CN105665053A - Low constant temperature device for cascade type high-low temperature test chamber - Google Patents
Low constant temperature device for cascade type high-low temperature test chamber Download PDFInfo
- Publication number
- CN105665053A CN105665053A CN201610199829.8A CN201610199829A CN105665053A CN 105665053 A CN105665053 A CN 105665053A CN 201610199829 A CN201610199829 A CN 201610199829A CN 105665053 A CN105665053 A CN 105665053A
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- temperature
- compressor
- low temperature
- test chamber
- electromagnetic valve
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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
- B01L7/50—Cryostats
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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
- B01L1/00—Enclosures; Chambers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/14—Means for pressure control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/18—Means for temperature control
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention provides a low constant temperature device for a cascade type high-low temperature test chamber. The low constant temperature device for the cascade type high-low temperature test chamber comprises a first compressor, high temperature and high pressure gas exhausted by the first compressor sequentially passes through a condenser, a first drying device, an electromagnetic valve B, a throttle and an evaporative condenser and returns to an inlet of the first compressor, a second compressor is sequentially connected with the evaporative condenser, a throttle of a second drying device, an electromagnetic valve C, a throttle and an evaporator to return back to the second compressor, an electromagnetic valve A is arranged between an exhaust port of the second compressor and an inlet of the evaporator, a temperature sensor is arranged at a recirculating air outlet in the test chamber, the temperature sensor transmits a temperature signal to a control system, and the control system controls the electromagnetic valves A and C to alternately act according to condition of a temperature pressure signal. The low constant temperature device for the cascade type high-low temperature test chamber always keeps temperature constant, and the evaporative condenser is avoided being frosted, so that service life of equipment is prolonged, constant temperature accuracy is improved, a heating inductor arranged above the evaporator is eliminated, electric energy is saved, and ultralow temperature ranging from -80 DEG C to -70 DEG C can be produced.
Description
Technical field
The invention belongs to high-low temperature test chamber field, especially relate to a kind of superposition type high-low temperature test chamber constant thermal apparatus at low temperature.
Background technology
High-low temperature test chamber is as a kind of test tools testing product reliability, it is widely used in aviation, space flight, military project, electronics, communication, machinery, automobile, motorcycle, biological, agricultural, weather, environmental protection, the fields such as building materials, the performance test of the product in the stricter field of temperature requirement is had great importance by the temperature constancy of high-low temperature test chamber for some, once the range of error of temperature constant will affect too greatly the performance test results of the product in some field, so the constant-temperature precision of high-low temperature test chamber is to evaluate an important indicator of its performance quality, also has the problem that high-low temperature test chamber exists evaporative condenser frosting, so how design the problem that a kind of constant-temperature precision is high and avoids the superposition type high-low temperature test chamber constant thermal apparatus at low temperature of evaporimeter frosting to become those skilled in the art's research.
Summary of the invention
In view of this, it is contemplated that propose a kind of constant-temperature precision height and avoid the superposition type high-low temperature test chamber constant thermal apparatus at low temperature of evaporimeter frosting.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:
A kind of superposition type high-low temperature test chamber constant thermal apparatus at low temperature, including the first compressor and the second compressor, the high temperature and high pressure gas condensed device successively that described first compressor is discharged, first drying device, B electromagnetic valve, reducer and evaporative condenser return to the first suction port of compressor, described second compressor is linked in sequence described evaporative condenser successively, second drying device reducer, C electromagnetic valve and vaporizer return to described second compressor, it is provided with A electromagnetic valve between described second exhaust outlet of compressor and described evaporator inlet, described proof box circulated air exit is provided with temperature, pressure induction installation, described temperature, pressure induction installation transmission temperature, pressure signal is to control system, described control system controls A electromagnetic valve and C electromagnetic valve alternating movement according to the situation of temperature, pressure signal.
Described first drying device and described second drying device are device for drying and filtering.
Described temperature sensing device is temperature sensors of high precision.
Described control system adopts instrument control Special temp controller module FA211 or FA200 to control.
Described reducer is capillary tube.
Relative to prior art, superposition type high-low temperature test chamber constant thermal apparatus at low temperature of the present invention has the advantage that
1. the superposition type high-low temperature test chamber constant thermal apparatus at low temperature of the present invention is controlled by temperature sensing device and control system, and constant-temperature precision is high, the input of evaporative condenser has two-way supply simultaneously, one tunnel is the low temperature low pressure gas through condenser and the first drying device and rearmounted reducer, one tunnel is the high temperature and high pressure gas discharged by the second compressor, the RST that control system gathers according to pressure and temp induction installation controls A, C electromagnetic valve linking, namely when temperature, pressure is lower than setting value, close C electromagnetic valve, start A electromagnetic valve simultaneously, when temperature, pressure is higher than setting value, start C electromagnetic valve, simultaneously close off A electromagnetic valve, remain temperature constant, and avoid evaporimeter frosting, the service life of extension device and raising constant-temperature precision, the ultra low temperature of-70 to-80 degree can be produced,
2. eliminate the heater assembly above vaporizer, saves energy;
3. the second drying device has filtering function can adsorb steam, filtering particle impurity etc., further extension device service life.
Accompanying drawing explanation
The accompanying drawing constituting the part of the present invention is used for providing a further understanding of the present invention, and the schematic description and description of the present invention is used for explaining the present invention, is not intended that inappropriate limitation of the present invention. In the accompanying drawings:
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
It should be noted that when not conflicting, the embodiment in the present invention and the feature in embodiment can be mutually combined.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than the device of instruction or hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not considered as limiting the invention. additionally, term " first ", " second " etc. are only for descriptive purposes, and it is not intended that indicate or imply relative importance or the implicit quantity indicating indicated technical characteristic. thus, the feature defining " first ", " second " etc. can express or implicitly include one or more these features. in describing the invention, except as otherwise noted, " multiple " are meant that two or more.
In describing the invention, it is necessary to explanation, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, for instance, it is possible to it is fixing connection, it is also possible to be removably connect, or connect integratedly; Can be mechanically connected, it is also possible to be electrical connection; Can be joined directly together, it is also possible to be indirectly connected to by intermediary, it is possible to be the connection of two element internals. For the ordinary skill in the art, it is possible to understand above-mentioned term concrete meaning in the present invention by concrete condition.
Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
A kind of superposition type high-low temperature test chamber constant thermal apparatus at low temperature, including the first compressor, the high temperature and high pressure gas condensed device successively that described first compressor is discharged, first drying device, B electromagnetic valve, reducer and evaporative condenser return to the first suction port of compressor, described second compressor is linked in sequence described evaporative condenser successively, second drying device reducer, C electromagnetic valve and vaporizer return to described second compressor, it is provided with A electromagnetic valve between described second exhaust outlet of compressor and described evaporator inlet, described temperature sensing device transmission temperature signal is to control system, when described control system controls the startup of A electromagnetic valve according to the situation of temperature, pressure signal, C closed electromagnetic valve, when C electromagnetic valve starts, A closed electromagnetic valve. the superposition type high-low temperature test chamber constant thermal apparatus at low temperature of the present invention is controlled by temperature sensing device and control system, and constant-temperature precision is high, the input of evaporative condenser has two-way supply simultaneously, one tunnel is the low temperature low pressure gas through condenser and the first drying device and rearmounted reducer, one tunnel is the high temperature and high pressure gas discharged by the second compressor, the RST that control system gathers according to pressure and temp induction installation controls A, C electromagnetic valve linking, namely when temperature, pressure is lower than setting value, close C electromagnetic valve, start A electromagnetic valve simultaneously, when temperature, pressure is higher than setting value, start C electromagnetic valve, simultaneously close off A electromagnetic valve, remain temperature constant, and avoid evaporimeter frosting, the service life of extension device and constant-temperature precision. eliminate the heater assembly above vaporizer, saves energy. can producing the ultra low temperature of-70 to-80 degree, B electromagnetic valve is by controlling system control, it is prevented that when the first compressor is closed, equipment is caused damage by backflow.
Described first drying device and the second drying device are device for drying and filtering. Drying device has filtering function can adsorb steam, filtering particle impurity etc., further extension device service life.
Described temperature, pressure induction installation is temperature sensors of high precision. Sensor is conveniently installed and used, and improves packaging efficiency.
Described control system adopts instrument control Special temp controller module FA211 or FA200 to control. Instrument control Special temp controller module FA211 or FA200 automatic control system have the advantages such as stability height, security performance is strong, capacity of resisting disturbance is strong, in addition, instrument control Special temp controller module FA211 or FA200 obtains effective simplification in parameter setting procedure, workability can be high so that the manipulation of operator becomes easy. Meanwhile, it is convenient that instrument control Special temp controller module FA211 or FA200 control system installs relatively other control system, and daily maintenance is also easier.
Described reducer is capillary tube. Throttle more stable.
Work process: the superposition type high-low temperature test chamber constant thermal apparatus at low temperature of the present invention is controlled by temperature sensing device and control system, constant-temperature precision is high, the input of evaporative condenser has two-way supply simultaneously, one tunnel is the low temperature low pressure gas through condenser and the first drying device and rearmounted reducer, one tunnel is the high temperature and high pressure gas discharged by the second compressor, the RST that control system gathers according to pressure and temp induction installation controls A, C electromagnetic valve linking, namely when temperature, pressure is lower than setting value, close C electromagnetic valve, start A electromagnetic valve simultaneously, when temperature, pressure is higher than setting value, start C electromagnetic valve, simultaneously close off A electromagnetic valve, remain temperature constant, and avoid evaporimeter frosting, the service life of extension device and raising constant-temperature precision, the ultra low temperature of-70 to-80 degree can be produced.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (5)
1. a superposition type high-low temperature test chamber constant thermal apparatus at low temperature, it is characterized in that: include the first compressor and the second compressor, the high temperature and high pressure gas condensed device successively that described first compressor is discharged, first drying device, B electromagnetic valve, reducer and evaporative condenser return to the first suction port of compressor, described second compressor is linked in sequence described evaporative condenser successively, second drying device reducer, C electromagnetic valve, reducer and vaporizer return to described second compressor, it is provided with A electromagnetic valve between described second exhaust outlet of compressor and described evaporator inlet, the outlet of described proof box circulated air is provided with temperature sensing device, described temperature sensing device transmission temperature signal is to control system, described control system controls A electromagnetic valve and C electromagnetic valve alternating movement according to the situation of temperature signal.
2. superposition type high-low temperature test chamber constant thermal apparatus at low temperature according to claim 1, it is characterised in that: described first drying device and described second drying device are device for drying and filtering.
3. superposition type high-low temperature test chamber constant thermal apparatus at low temperature according to claim 1, it is characterised in that: described temperature, pressure induction installation is high-precision temperature, pressure integrated sensor.
4. superposition type high-low temperature test chamber constant thermal apparatus at low temperature according to claim 2, it is characterised in that: described control system adopts instrument control Special temp controller module FA211 or FA200 to control.
5. the superposition type high-low temperature test chamber constant thermal apparatus at low temperature according to any one of claim 1-4, it is characterised in that: described reducer is capillary tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610199829.8A CN105665053A (en) | 2016-03-30 | 2016-03-30 | Low constant temperature device for cascade type high-low temperature test chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610199829.8A CN105665053A (en) | 2016-03-30 | 2016-03-30 | Low constant temperature device for cascade type high-low temperature test chamber |
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| CN105665053A true CN105665053A (en) | 2016-06-15 |
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| CN201610199829.8A Pending CN105665053A (en) | 2016-03-30 | 2016-03-30 | Low constant temperature device for cascade type high-low temperature test chamber |
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| CN (1) | CN105665053A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109367826A (en) * | 2018-10-18 | 2019-02-22 | 九江精密测试技术研究所 | Spatial attitude simulation table high-precision shafting systems stabilisation |
| CN109579337A (en) * | 2018-11-26 | 2019-04-05 | 江苏天舒电器有限公司 | A kind of superposition type hot wind control system and method |
| CN113019487A (en) * | 2021-03-02 | 2021-06-25 | 重庆浩生科技有限公司 | Temperature change test system capable of cooling to extremely low temperature at high rate |
| CN116879066A (en) * | 2023-09-04 | 2023-10-13 | 天津亭华科技有限公司 | Gas cylinder fatigue composite environment test system capable of controlling medium temperature |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1077029A (en) * | 1992-04-02 | 1993-10-06 | 上海制冷设备厂 | Energy-saving low-and high-temp test facility |
| KR100897131B1 (en) * | 2008-03-05 | 2009-05-14 | 유인석 | System of heat pump for cooling and heating of middle pressure binary cycle for cold areas |
| CN202420018U (en) * | 2012-01-13 | 2012-09-05 | 重庆市威尔试验仪器有限公司 | Energy-saving mixed cascade refrigeration system |
| KR20120131403A (en) * | 2011-05-25 | 2012-12-05 | 학교법인 두원학원 | Air-conditioning system using vortex tube |
| CN203274344U (en) * | 2013-03-26 | 2013-11-06 | 安徽亿瑞深冷能源科技有限公司 | Energy-saving cascade refrigerating system |
| CN103486754A (en) * | 2013-08-26 | 2014-01-01 | 安徽亿瑞深冷能源科技有限公司 | Energy-saving middle temperature refrigerant/middle temperature refrigerant cascade refrigeration system |
| CN205037609U (en) * | 2015-08-29 | 2016-02-17 | 东莞市捷新检测设备有限公司 | Low temperature environment control system |
| CN205628009U (en) * | 2016-03-30 | 2016-10-12 | 天津亭华科技有限公司 | Overlapping formula high low temperature test box low -temperature constant -temperature device |
-
2016
- 2016-03-30 CN CN201610199829.8A patent/CN105665053A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1077029A (en) * | 1992-04-02 | 1993-10-06 | 上海制冷设备厂 | Energy-saving low-and high-temp test facility |
| KR100897131B1 (en) * | 2008-03-05 | 2009-05-14 | 유인석 | System of heat pump for cooling and heating of middle pressure binary cycle for cold areas |
| KR20120131403A (en) * | 2011-05-25 | 2012-12-05 | 학교법인 두원학원 | Air-conditioning system using vortex tube |
| CN202420018U (en) * | 2012-01-13 | 2012-09-05 | 重庆市威尔试验仪器有限公司 | Energy-saving mixed cascade refrigeration system |
| CN203274344U (en) * | 2013-03-26 | 2013-11-06 | 安徽亿瑞深冷能源科技有限公司 | Energy-saving cascade refrigerating system |
| CN103486754A (en) * | 2013-08-26 | 2014-01-01 | 安徽亿瑞深冷能源科技有限公司 | Energy-saving middle temperature refrigerant/middle temperature refrigerant cascade refrigeration system |
| CN205037609U (en) * | 2015-08-29 | 2016-02-17 | 东莞市捷新检测设备有限公司 | Low temperature environment control system |
| CN205628009U (en) * | 2016-03-30 | 2016-10-12 | 天津亭华科技有限公司 | Overlapping formula high low temperature test box low -temperature constant -temperature device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109367826A (en) * | 2018-10-18 | 2019-02-22 | 九江精密测试技术研究所 | Spatial attitude simulation table high-precision shafting systems stabilisation |
| CN109579337A (en) * | 2018-11-26 | 2019-04-05 | 江苏天舒电器有限公司 | A kind of superposition type hot wind control system and method |
| CN113019487A (en) * | 2021-03-02 | 2021-06-25 | 重庆浩生科技有限公司 | Temperature change test system capable of cooling to extremely low temperature at high rate |
| CN116879066A (en) * | 2023-09-04 | 2023-10-13 | 天津亭华科技有限公司 | Gas cylinder fatigue composite environment test system capable of controlling medium temperature |
| CN116879066B (en) * | 2023-09-04 | 2023-11-17 | 天津亭华科技有限公司 | Gas cylinder fatigue composite environment test system capable of controlling medium temperature |
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Application publication date: 20160615 |