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CN204166412U - Automatic constant-temperature control system - Google Patents

Automatic constant-temperature control system Download PDF

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Publication number
CN204166412U
CN204166412U CN201420538241.7U CN201420538241U CN204166412U CN 204166412 U CN204166412 U CN 204166412U CN 201420538241 U CN201420538241 U CN 201420538241U CN 204166412 U CN204166412 U CN 204166412U
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China
Prior art keywords
storage container
liquid storage
pipeline
heating module
control system
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Expired - Lifetime
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CN201420538241.7U
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Chinese (zh)
Inventor
卫洁
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Shanghai Chuangjie Technology Co ltd
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Shanghai Chuangjie Science & Technology Co Ltd
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Abstract

The utility model discloses a kind of automatic constant-temperature control system, comprises a liquid storage container, is connected with circulating fluid entrance by pipeline; One electrical heating module, is arranged on described liquid storage container, for heating liquid in described liquid storage container; One heat interchanger heating module, to be exported with described circulating fluid by pipeline and described liquid storage container and is connected; Described circulating fluid entrance exports with described circulating fluid and is connected; One temperature sensor, is arranged on the pipeline between described liquid storage container and described heat interchanger heating module, for the temperature of liquid in testing pipes, links with described electrical heating module and heat interchanger heating module.By adopting heat interchanger heating module and electrical heating module two kinds of type of heating, realizing automatic constant-temperature and controlling, there is firing rate soon and temperature controls accurate advantage, simple operation, there is more excellent technique effect.

Description

Automatic constant-temperature control system
Technical field
The utility model relates to domain of control temperature, particularly relates to thermostatic control.
Background technology
From the detection angles of process variable, temperature is one of modal process variable, and it is a very important process variable, because it directly affects the physics and chemistry such as chemical reaction, concentration process.
Since the seventies, due to the needs of industrial stokehold, particularly in the fast development of microelectric technique and computer technology, and under the promotion of Theory of Automatic Control and method for designing development, temperature control technology development rapidly, and in intellectuality, the aspects such as the Self-tuning System of auto-adaptive parameter achieve very large scientific and technological achievement.Two classes can be divided into: dynamic temperature is followed the tracks of and constant temperature controls according to the difference of control objectives.It is that the temperature value of controlled device is changed by pre-set curve that dynamic temperature follows the tracks of the control objectives realized.And the temperature controlled object of constant makes the temperature constant of controlled device numerically a certain, and require that its fluctuating range (i.e. steady-state error) can not exceed a certain set-point.
Widely, the states such as Japan, the U.S., Germany, Sweden are leading at the Technical comparing of thermostatic control system development this respect, and all produced the temperature system of a collection of commercial excellent performance in thermostatic control technology application.Because thermostatic control technology has the features such as operating mode complexity, parameter are changeable, control hysteresis; temperature control is bad just may cause the series of problems such as safety in production, product quality and output; and along with the fast development of technology; it to the miniaturization of equipment and intelligentized requirement also more and more higher; therefore as automatic constant-temperature control system; need to consider the many aspects such as temperature controlled accuracy, floor area, cost performance, reliability, temperature of controlling well usually can run into some unpredictable difficulties.From temperature control system and the technology of current domestic production, its overall development level is still not high.
Utility model content
The purpose of this utility model, proposes a kind of temperature control system that can realize the automatic control of temperature exactly.
The utility model, for solving the problems of the technologies described above, provides a kind of automatic constant-temperature control system, comprising:
One liquid storage container, is connected with circulating fluid entrance by pipeline;
One electrical heating module, is arranged on described liquid storage container, for heating liquid in described liquid storage container;
One heat interchanger heating module, to be exported with described circulating fluid by pipeline and described liquid storage container and is connected;
Described circulating fluid entrance exports with described circulating fluid and is connected;
One temperature sensor, is arranged on the pipeline between described liquid storage container and described heat interchanger heating module, for the temperature of liquid in testing pipes, links with described electrical heating module and described heat interchanger heating module.
Automatic constant-temperature control system that the utility model provides adopts heat interchanger heating module to realize Fast Heating to liquid, and adopts electrical heating module to carry out thermostatic control to liquid further, has that firing rate is fast, temperature controls accurate advantage.
As further improvement of the utility model, described automatic constant-temperature control system also comprises the total pipeline that is connected with liquid, it is connected with described liquid storage container by the first normally close valve, start in liquid storage container described in forward direction in system and inject required liquid, and, in system work process, liquid make-up is carried out to described liquid storage container.
As further improvement of the utility model, described automatic constant-temperature control system also comprises a pressure transducer, is arranged on the pipeline between described liquid storage container and described heat interchanger heating module, for the pressure in testing pipes.
As further improvement of the utility model, described automatic constant-temperature control system also comprises a supercharge pump, be arranged on the pipeline between described liquid storage container and described heat interchanger heating module, link with described pressure transducer, automatically start according to the pressure change that manifold pressure sensor detects and stop, realize manifold pressure to stablize, guarantee that liquid-circulating is carried.
As further improvement of the utility model, described automatic constant-temperature control system also comprises a liquid level sensor, is arranged on described liquid storage container, for monitoring the liquid level of described liquid storage container inside, when supplementing in time during fluid low in described liquid storage container.
As further improvement of the utility model, wherein, described electrical heating module type of heating is inductive heating, and temperature controls more accurate.
As further improvement of the utility model, wherein, described liquid storage container has the first opening, the second opening, the 3rd opening, exhausr port and overflow vent; Described first opening is connected with circulating fluid entrance by the first valve; Described second opening is connected with described total pipeline by described first normally close valve; Described 3rd opening is connected with described supercharge pump by the second valve, and described exhausr port is provided with a visor, can check liquid level in described liquid storage container, and described overflow vent is provided with described liquid level sensor, and is used for discharging of waste liquid by connection one pipeline.
As further improvement of the utility model, wherein, described heat interchanger heating module has the first corner apertures, the second corner apertures, delthyrium and the 4th corner apertures; Described first corner apertures is by the second opening in communication of pipeline and described liquid storage container; Described second corner apertures is connected with a liquid releasing valve by the second normally close valve; Described delthyrium passes into steam by pipeline; Described 4th corner apertures is by pipeline and described circulating fluid outlet; The 3rd valve is provided with between described 4th corner apertures and circulating fluid export.
As further improvement of the utility model, wherein, described liquid releasing valve one end connects a pipeline and discharges for condensed fluid, guarantees that condensed fluid can not affect heating effect.
As further improvement of the utility model, wherein, between described 4th corner apertures and described 3rd valve, be provided with cassette non-return valve, make flow direction in system be one-way conduction, namely can only to circulating fluid Way out trickle, and can not be contrary.
The beneficial effect of the utility model automatic constant-temperature control system is as follows:
1, first pass into heat interchanger heating module with industrial steam and carry out Fast Heating intensification, when in system, temperature rising approaches to temperature required, close heat interchanger heating module, re-using electrical heating module, to be slowly warmed up to system temperature required and keep circulation, has that firing rate is fast and temperature controls accurate advantage.
2, have employed heating temperatures automatically to control, simple operation, there is more excellent technique effect.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Fig. 1 is the structural representation of automatic constant-temperature control system.
Number in the figure illustrates:
1 first valve; 2 first normally close valves; 3 electrical heating modules; 4 visors; 5 liquid level sensors; 6 liquid storage containers; 61 first openings; 62 second openings; 63 the 3rd openings; 7 second valves; 8 supercharge pumps; 9 pressure transducers; 10 temperature sensors; 11 heat interchanger heating modules; 111 first corner apertures; 112 second corner apertures; 113 delthyriums; 114 the 4th corner apertures; 12 second normally close valves; 13 liquid releasing valves; 14 the 3rd normally close valves; 15 non-return valve; 16 the 3rd valves; 17 exhausr ports; 18 overflow vents; 19 total pipelines.
Embodiment
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, to those skilled in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the automatic constant-temperature control system that Fig. 1 provides for the utility model.The present embodiment proposes a kind of automatic constant-temperature control system, comprise a liquid storage container 6, be connected with circulating fluid entrance by pipeline, circulating fluid outlet is connected with circulating fluid entrance by pipeline, for carrying the circulating fluid after heating to circulating fluid entrance; One electrical heating module 3, is arranged on liquid storage container 6, and in accuracy-control system, liquid heats up; One heat interchanger heating module 11, to be exported with circulating fluid by pipeline and liquid storage container 6 and be connected, in the utility model, heat interchanger heating module adopts plate type heat exchanger, inputs liquid in industrial steam automotive quick-heat system, make its temperature rapidly close to desired temperature in heat interchanger heating module 11; Circulating fluid entrance exports with circulating fluid and is connected; One temperature sensor 10, is arranged on the pipeline between liquid storage container 6 and heat interchanger heating module 11, for the temperature of liquid in testing pipes, links with electrical heating module 3 and heat interchanger heating module 11.
Concrete, temperature sensor 10 is provided with the lower limit temperature of ceiling temperature that electrical heating module stops and startup, and the lower limit temperature of the ceiling temperature that stops of heat interchanger heating module and startup.Wherein, the lower limit temperature that electrical heating module starts and the ceiling temperature that heat interchanger heating module stops are identical values.After temperature sensor 10 detects the lower limit temperature that intrasystem fluid temperature is arranged lower than heat interchanger heating module 11, heat interchanger heating module starts heating automatically.When temperature sensor 10 detect intrasystem fluid temperature reach heat interchanger heating module 11 arrange ceiling temperature after heat interchanger heating module 11 automatically stop, now electrical heating module 3 starts.Automatically electrical heating module 3 is stopped after intrasystem fluid temperature reaches the ceiling temperature of electrical heating module 3 setting when temperature sensor 10 detects.After temperature sensor 10 detects the lower limit temperature that intrasystem fluid temperature is arranged lower than electrical heating module 3, automatically start electrical heating module 3, the liquid in heating system, circulates with this.
Aforesaid liquid can be water, comprises tap water, potable water etc.Mainly look application scenario and determine to adopt which kind of liquid, comprise Xiang Shuizhong and add various adjuvant or filter some objectionable impurities.
Improve embodiment one, obtain preferred embodiment two, wherein, automatic constant-temperature control system also comprises the total pipeline 19 that is connected with liquid.Total pipeline 19 is connected with liquid storage container 6 by the first normally close valve 2, starts in forward direction liquid storage container 6 inject required liquid in system.And in system work process, total pipeline 19 pairs of liquid storage containers 6 carry out liquid make-up.
Improve above-described embodiment, obtain preferred embodiment three, wherein, automatic constant-temperature control system also comprises a pressure transducer 9.Pressure transducer 9 is arranged on the pipeline between liquid storage container 6 and heat interchanger heating module 11, for the pressure change in testing pipes.Before system works, start and stop pressure is arranged to pressure transducer 9, comprise the threshold pression value needed for liquid in upwards conveyance conduit, and, the pressure upper limit value in conveyance conduit needed for liquid.
Improve above-described embodiment, obtain preferred embodiment four, wherein, automatic constant-temperature control system also comprises a supercharge pump 8.Supercharge pump 8 is arranged on the pipeline between liquid storage container 6 and heat interchanger heating module 11, links with pressure transducer 9.After pressure transducer 9 regulates start and stop pressure, when the pointer on pressure transducer 9 gets to the pressure upper limit value of user's setting, supercharge pump 8 auto-breaking is out of service.After liquid in system flows out from circulating fluid outlet, manifold pressure declines, and the pointer on pressure transducer 9 can be turned back to the threshold pression value of user's setting.Now, supercharge pump 8 start is reruned, and increases the pressure in pipeline, liquid can be carried on described heat interchanger heating module 11.Circulate and so forth, thus realize constant voltage conveying liquid.
Improve above-described embodiment, obtain preferred embodiment five, wherein, automatic constant-temperature control system also comprises a liquid level sensor 5, is arranged on described liquid storage container 6, for monitoring the liquid level of described liquid storage container 6 inside.In system works, liquid level sensor 5 to detect in described liquid storage container 6 whether fluid low, facilitates timely to liquid make-up in liquid storage container 6.
Improve above-described embodiment, obtain preferred embodiment six, wherein, electrical heating module 3 type of heating is inductive heating, and compared to common heating mode, inductive heating can the precision of control temperature more accurately.
Improve above-described embodiment, obtain preferred embodiment seven, wherein, liquid storage container 6 has the first opening 61, second opening 62, the 3rd opening 63, exhausr port 17 and overflow vent 18.First opening 61 is connected with circulating fluid entrance by the first valve 1.Wherein, the first valve 1 is manual ball valve, is entered in liquid storage container 6 by switch control rule circulating fluid.Second opening 62 is connected with total pipeline 19 by the first normally close valve 2.Wherein, the first normally close valve 2 is pneumatic angle pedestal valve, and the liquid of bring into operation in automatic constant-temperature control system front opening, heating needed for injecting from total pipeline 19 to liquid storage container 6, just closes the first normally close valve 2 after fluid injection completes, make it be in normally off.3rd opening 63 is connected with described supercharge pump 8 by the second valve 7, and the liquid in liquid storage container 6 is carried in heat interchanger heating module 11 by the 3rd opening 63.Wherein, the second valve 7 is manual ball valve, when the operation work of automatic constant-temperature control system, is normally open.
Concrete, liquid storage container 6 described in the automatic constant-temperature control system that the utility model provides also is provided with exhausr port 17 and overflow vent 18.Wherein, exhausr port 17 is for the air in removal system.Exhausr port 17 is also provided with visor 4, the liquid level situation of liquid in liquid storage container 6 can be checked by visor 4.Overflow vent 18 is provided with described liquid level sensor 5, discharges by connecting a pipeline waste liquid overflowed in liquid storage container 6.
Improve above-described embodiment, obtain preferred embodiment eight, wherein, heat interchanger heating module 11 has the first corner apertures 111, second corner apertures 112, delthyrium 113 and the 4th corner apertures 114.First corner apertures 111 is connected with the second opening 62 of described liquid storage container 6 by pipeline.Liquid in system through the second opening 62, is delivered in heat interchanger heating module 11 by the first corner apertures 111 and heats from liquid storage container 6.Second corner apertures 112 is connected with a liquid releasing valve 13 by the second normally close valve 12.Wherein, the second normally close valve 12 is pneumatic angle pedestal valve, is normally off.Delthyrium 113 passes into steam by pipeline.Between delthyrium 113 and steam inlet, be provided with the 3rd normally close valve 14, the 3rd normally close valve 14 is pneumatic angle pedestal valve.When system brings into operation, open described 3rd normally close valve 14, by the liquid in industrial steam heating heat exchanger heating module 11.When heat interchanger heating module 11 stops automatically, close the 3rd normally close valve 14 and keep its closed condition, stopping input industrial steam.When heat interchanger heating module 11 starts automatically, again open the 3rd normally close valve 14, input industrial steam to heat interchanger heating module 11.4th corner apertures 114 is by pipeline and described circulating fluid outlet, and the liquid after heating exports from circulating fluid outlet.Be provided with the 3rd valve 16 between 4th corner apertures and circulating fluid export, wherein, the 3rd valve 16 is manual ball valve.
Above-described embodiment is improved, obtains preferred embodiment nine.Liquid releasing valve 13 one end connects a pipeline.When producing condensed fluid in system, opening liquid releasing valve 13, carrying out lyophoby by pipeline, guarantee that condensed fluid can not affect heating effect.
Above-described embodiment is improved, obtains preferred embodiment ten, wherein, between the 4th corner apertures 114 and described 3rd valve 16, be provided with cassette non-return valve 15, to make in system flow direction for one-way conduction from bottom to top.
The utility model adopts the configuration of heat interchanger heating module 11, electrical heating module 3 and temperature sensor 10, realizes the automatic control of temperature.In the present embodiment, the preferred potable water of described liquid, it is as follows that its temperature controls specific implementation process: first open the first normally close valve 2, inject potable water by total pipeline 19 to liquid storage container 6.Monitored the liquid level situation in liquid storage container 6 by liquid level sensor 5 and visor 4, after injecting quantitative potable water, close the first normally close valve 2.Open the second valve 7, the potable water in liquid storage container 6 is exported by the 3rd opening 63, through supercharge pump 8, pressure transducer 9 and temperature sensor 10, enters in heat interchanger heating module 11.Now, open the 3rd normally close valve 14, in heat interchanger heating module 11, pass into industrial steam by the delthyrium 113 of heat interchanger heating module 11, the potable water flowed through in heat interchanger heating module 11 is heated.While passing into industrial steam, the second normally close valve 12 valve and liquid releasing valve 13 is utilized to carry out hydrophobic treatments by pipeline to the condensate water produced in system.Finally open the 3rd valve 16, the potable water after heating is transferred out by circulating fluid outlet.
Open the first valve 1, export the potable water after the heating transported out from circulating fluid and inject liquid storage container 6 by circulating fluid entrance.Check liquid level situation by the visor 4 on liquid storage container 6, if any flooded conditions, flow out by overflow vent 18.Potable water in liquid storage container 6 causes temperature to raise due to the potable water after the heating of newly injecting.Now, then export through the 3rd opening 63 of liquid storage container 6, enter in heat interchanger heating module 11 through supercharge pump 8, pressure transducer 9 and temperature sensor 10.Continue the potable water passed in industrial steam heat exchanger heating module 11 to heat, finally the potable water after heating is transferred out by circulating fluid outlet.The potable water in system is so repeatedly made to circulate rapidly intensification.
Pressure transducer 9 in system arranges pressure upper limit value and threshold pression value, monitors the pressure in pipeline.After potable water in system flows out from circulating fluid outlet, manifold pressure declines, and the pointer now on pressure transducer 9 can reach the threshold pression value of user's setting.Now, supercharge pump 8 starts, and increases the pressure in pipeline, potable water can be carried on described heat interchanger heating module 11.When the pointer that manifold pressure is increased to pressure transducer 9 reaches the pressure upper limit value of user's setting, supercharge pump 8 quits work.Supercharge pump 8 so circulating start and outage, can constant pressure in guarantee system.Temperature sensor 10 arranges and links with electrical heating module 3 and heat interchanger heating module 11.Temperature sensor 10 is provided with the ceiling temperature and the lower limit temperature of startup that heat interchanger heating module 11 stops, and the lower limit temperature of the ceiling temperature that stops of electrical heating module 3 and startup.Temperature sensor 10 moment is monitored the temperature of potable water in system.When the potable water temperature that temperature sensor 10 detects reaches the ceiling temperature of heat interchanger heating module 11 stopping that temperature sensor 10 is arranged, close the 3rd normally close valve 14, stop passing into industrial steam, heat interchanger heating module 11 no longer heats.
Now, start electrical heating module 3, the potable water in liquid storage container 6 is heated.Electrical heating module 3 and temperature sensor 10 link.When temperature sensor 10 detects that intrasystem potable water temperature reaches the ceiling temperature of electrical heating module 3 stopping that temperature sensor 10 sets, automatically stop electrical heating module 3.A period of time potable water temperature reduces naturally, and temperature sensor 10 detects that the temperature of potable water automatically starts electrical heating module 3 when reaching the lower limit temperature of electrical heating startup that it is arranged and continues heating.When potable water because a large amount of consumption causes not stopping moisturizing, during the lower limit temperature that heat interchanger heating module 11 that now temperature sensor 10 detection system temperature is arranged lower than it starts, the heat interchanger heating module 11 pairs of systems that reset automatically carry out Fast Heating, until when temperature sensor 10 detects that in system, the temperature of potable water reaches the ceiling temperature of heat interchanger heating module 11 stopping that temperature sensor 10 is arranged again, automatic stopping heat interchanger heating module 11, now, electrical heating module 3 automatically starts and starts heating.
Iterative cycles like this, the potable water temperature in guarantee system keeps constant in setting range, thus the automatic constant-temperature realizing temperature controls.In system work process, detect level condition in liquid storage container 6 at any time by liquid level sensor 5.When in liquid storage container 6 during shortage of drinking water, again open the first normally close valve 2, in liquid storage container 6, supplement potable water from total pipeline 19.
Automatic constant-temperature control system in above-described embodiment is only single cover, in actual use, can overlap more and use in groups, when many covers use, circulating fluid outlet in upper set of system connects the circulating fluid entrance of lower set of system, realizes the heat systemic circulation of many cover systems.
Be described in detail the specific embodiment of utility model above, but the utility model is not restricted to specific embodiment described above, it is just as example.To those skilled in the art, any equivalent modifications that this system is carried out and substituting also all among category of the present utility model.Therefore, equalization conversion done under the spirit and scope not departing from utility model and amendment, all should be encompassed in scope of the present utility model.

Claims (10)

1. an automatic constant-temperature control system, is characterized in that, comprising:
One liquid storage container, is connected with circulating fluid entrance by pipeline;
One electrical heating module, is arranged on described liquid storage container, for heating liquid in described liquid storage container;
One heat interchanger, to be exported with described circulating fluid by pipeline and described liquid storage container and is connected;
Described circulating fluid entrance exports with described circulating fluid and is connected;
One temperature sensor, is arranged on the pipeline between described liquid storage container and described heat interchanger, for the temperature of liquid in testing pipes, links with described electrical heating module.
2. a kind of automatic constant-temperature control system as claimed in claim 1, is characterized in that, also comprise:
One total pipeline being connected with liquid, it is connected with described liquid storage container by the first normally close valve.
3. a kind of automatic constant-temperature control system as claimed in claim 1 or 2, is characterized in that, also comprise:
One pressure transducer, is arranged on the pipeline between described liquid storage container and described heat interchanger, for the pressure in testing pipes.
4. a kind of automatic constant-temperature control system as claimed in claim 3, is characterized in that, also comprise:
One supercharge pump, is arranged on the pipeline between described liquid storage container and described heat interchanger, links with described pressure transducer.
5. a kind of automatic constant-temperature control system as claimed in claim 4, is characterized in that, also comprise:
One liquid level sensor, is arranged on described liquid storage container, for monitoring the liquid level of described liquid storage container inside.
6. a kind of automatic constant-temperature control system as claimed in claim 1, is characterized in that:
Described electrical heating module type of heating is inductive heating.
7. a kind of automatic constant-temperature control system as claimed in claim 5, is characterized in that:
Described liquid storage container has the first opening, the second opening, the 3rd opening, exhausr port and overflow vent; Described first opening is connected with circulating fluid entrance by the first valve; Described second opening is connected with described total pipeline by described first normally close valve; Described 3rd opening is connected with described supercharge pump by the second valve; Described exhausr port is provided with a visor; Described overflow vent is provided with described liquid level sensor, and is used for discharging of waste liquid by connection one pipeline.
8. a kind of automatic constant-temperature control system as claimed in claim 7, is characterized in that:
Described heat interchanger has the first corner apertures, the second corner apertures, delthyrium and the 4th corner apertures; Described first corner apertures is by described second opening in communication of pipeline and described liquid storage container; Described second corner apertures is connected with a liquid releasing valve by the second normally close valve; Described delthyrium passes into steam by pipeline; Described 4th corner apertures is by pipeline and circulating fluid outlet; The 3rd valve is provided with between described 4th corner apertures and circulating fluid export.
9. a kind of automatic constant-temperature control system according to claim 8, is characterized in that:
Described liquid releasing valve one end connects a pipeline and discharges for condensed fluid.
10. a kind of automatic constant-temperature control system according to claim 8, is characterized in that:
Cassette non-return valve is provided with between described 4th corner apertures and described 3rd valve.
CN201420538241.7U 2014-09-19 2014-09-19 Automatic constant-temperature control system Expired - Lifetime CN204166412U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420538241.7U CN204166412U (en) 2014-09-19 2014-09-19 Automatic constant-temperature control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420538241.7U CN204166412U (en) 2014-09-19 2014-09-19 Automatic constant-temperature control system

Publications (1)

Publication Number Publication Date
CN204166412U true CN204166412U (en) 2015-02-18

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106944427A (en) * 2017-05-04 2017-07-14 重庆南方数控设备有限责任公司 Esr analyzer cleaning device and the Wei Shi esr analyzers comprising the cleaning device
CN107728671A (en) * 2017-11-07 2018-02-23 深圳市奥德机械有限公司 A kind of double mode handover control system of automatic steam control and electric heating control

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106944427A (en) * 2017-05-04 2017-07-14 重庆南方数控设备有限责任公司 Esr analyzer cleaning device and the Wei Shi esr analyzers comprising the cleaning device
CN107728671A (en) * 2017-11-07 2018-02-23 深圳市奥德机械有限公司 A kind of double mode handover control system of automatic steam control and electric heating control
CN107728671B (en) * 2017-11-07 2023-03-28 深圳市奥德机械有限公司 Dual-mode switching control system for steam control and electric heating control

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Address before: Guo Shou Jing Road, Pudong New Area Zhangjiang hi tech park Shanghai city 201203 No. 415

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