CN103335909A - High-low temperature impact test box - Google Patents
High-low temperature impact test box Download PDFInfo
- Publication number
- CN103335909A CN103335909A CN 201310300469 CN201310300469A CN103335909A CN 103335909 A CN103335909 A CN 103335909A CN 201310300469 CN201310300469 CN 201310300469 CN 201310300469 A CN201310300469 A CN 201310300469A CN 103335909 A CN103335909 A CN 103335909A
- Authority
- CN
- China
- Prior art keywords
- low temperature
- high temperature
- temperature
- casing
- electrical system
- 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.)
- Pending
Links
Images
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention relates to the technical field of sample temperature impact test instruments, in particular to a high-low temperature impact test box which comprises a high temperature box body, a low temperature box body, an electrical cabinet, an electrical system, a refrigeration system and a heating system, wherein the heating system is arranged inside the high temperature box body, the refrigeration system is arranged inside the low temperature box body, and both the heating system and the refrigeration system are in wired connection with the electrical system. The high-low temperature impact test box is characterized in that a high temperature slot air-conditioning system is arranged inside the high temperature box body, a low-temperature slot circulating system is arranged inside the low-temperature box body, both the high temperature slot air-conditioning system and the low-temperature slot circulating system are in wired connection with the electrical system, and basket transmission systems capable of moving up and down are arranged inside the high temperature box body and the low-temperature box body respectively. According to the invention, since the upper and lower boxes adopt different media, the high-temperature box adopts air, and the low-temperature box adopts water, the specific volume of water is very large, and during impacting, a test piece is enabled to reach a low temperature instantaneously. Therefore, the testing is enabled to be rigorous and the testing requirements of special material can be met.
Description
[technical field]
The present invention relates to sample temperature impulse test instrument technical field, specifically a kind of high and low temperature impulse test case.
[background technology]
At present, the two-box type thermal shock test chamber is very short switching time owing to its high low temperature, and temperature variation is violent, thereby can detect material very soon under the situation that temperature becomes fast repeatedly, the temp. variation resistant performance of trial target, but mainly there is following problem in main product in the market:
1. all be for two the casees up and down the high/low-temperature impact with a kind of medium basically, seldom relate to two kinds of different mediums, can not satisfy the special test requirement;
2. all be a kind of conflicting model basically, two packing lists up and down solely can not be done thermocycling, the utilization factor of product is not high;
3. temperature control is generally the air port temperature control, but not the product surface temperature control can not realize fast that product temperature reaches setting value;
4. wind speed is constant, can not set different wind speed according to different product;
5. automaticity is not high, can not concentrate remote monitoring, and the test history curve is preserved undesirable.
[summary of the invention]
Purpose of the present invention is exactly will solve above-mentioned deficiency and a kind of high and low temperature impulse test case is provided, and high-temperature cabinet is air, and cryogenic box is water, the specific volume of water is very big, during impact, can make test specimen moment reach low temperature, thereby make test harsher, can satisfy the testing requirements of special material.
Design a kind of high and low temperature impulse test case for achieving the above object, comprise the high temperature casing, the low temperature casing, regulator cubicle, electrical system, refrigeration system and heating system, described high temperature box house is provided with heating system, described low temperature box house is provided with refrigeration system, described heating system, refrigeration system circuit respectively connects electrical system, be provided with high temperature groove air handling system in the described high temperature casing, be provided with the cryostat, circulation system in the described low temperature casing, described high temperature groove air handling system, cryostat, circulation system circuit respectively connects electrical system, described high temperature casing, be respectively equipped with hand basket kinematic train moving up and down in the low temperature casing.
Described high temperature groove air handling system comprises high temperature groove, circulation motor and blower fan, described circulation motor is installed in the high temperature cabinet exterior, the output terminal of described circulation motor connects blower fan, and described blower fan is installed in the high temperature box house, and described circulation motor circuit connects electrical system.
The described cryostat, circulation system comprises cryostat,, stainless steel water circulating pump and water tank, described water tank is arranged on low temperature casing rear side, described stainless steel water circulating pump is installed in the water tank bottom, described cryostat, connects the stainless steel water circulating pump by pipeline, and described stainless steel water circulating pump circuit connects electrical system.
Be provided with level sensor in the described cryostat,, described level sensor circuit connects electrical system.
Described hand basket kinematic train comprises hand basket specimen holder and cylinder, and the piston end of described cylinder connects the hand basket specimen holder.
Described refrigeration system comprises compressor, evaporator and condenser, described evaporator is pipe-coil type evaporator, described pipe-coil type evaporator is installed on the low temperature cabinet wall, and described compressor, condenser are separately positioned on high temperature casing rear side, and described compressor connects electrical system by circuit.
Described heating system comprises stainless steel support and electric heater, and described electric heater is installed on the high temperature cabinet wall by stainless steel support, and described electric heater connects electrical system by circuit, and described electric heater adopts the nichrome wire electric heater.
Described high temperature casing and low temperature casing adopt panel beating to make, and described panel beating is made up of shell, outer courage and inner bag, and described shell adopts steel plate to make, and described outer surface of outer cover is sprayed with plastic layer, and described outer courage adopts corrosion resistant plate to make, and described inner bag is heat-insulation layer.
One side of described high temperature casing, low temperature casing connects regulator cubicle, described regulator cubicle and high temperature casing, cryogenic box system are integral the formula structure, the front of described regulator cubicle is provided with control panel, described control panel is provided with touch-screen, described electrical system is arranged on the rear side of control panel, and described electrical system is by the button control zone on the line connection control panel.
Described high temperature casing front end face is provided with sliding door, and described sliding door is provided with view window.
The present invention compares with prior art, has the following advantages:
1. adopt different mediums two the casees up and down, high-temperature cabinet is air, and cryogenic box is water, and the specific volume of water is very big, during impact, can make test specimen moment reach low temperature, thereby make test harsher, satisfies the testing requirements of special material;
2. touch screen operation, the temperature-controlled precision height, more convenient to operate succinct, and have network function, many bench teats can be tested the equipment collection and monitor at a computer display screen, improved automaticity greatly, controller carries capacity, but stored profiles reach more than 300 days, can very easily data be downloaded, be put on the computer and open, preserve;
3. high temperature groove wind speed automatic switchover design, when guaranteeing to impact high temperature, air circulation is accelerated in the high temperature groove, and the temperature inside the box is more even, thereby makes the test products faster speed reach setting value;
4. temperature probe can surperficial temperature control, is placed in the middle of the product, makes test temperature truer, tests more reliable;
5. compressor adopts the energy control mode, reduces the compressor on-off frequency, the serviceable life of improving compressor to greatest extent;
6. the cryostat, water pump is all steel, and pipe-coil type evaporator all passes through electroplating processes, thereby guarantees the clean of cryostat, water quality, prevents from getting rusty;
7. from start to finish, design concept is placed equipment above the other things based on safe and reliable to the safety of the person; the band creepage protection function, lack of water warning function, overtemperature prote function etc.; guarantee that equipment when any fault occurring, can both protect shutdown, can not damage the person.
[description of drawings]
Fig. 1 is inner structure synoptic diagram of the present invention;
Fig. 2 is side structure synoptic diagram of the present invention;
Fig. 3 is top structure synoptic diagram of the present invention;
Among the figure: 1, high temperature casing 2, low temperature casing 3, regulator cubicle 4, circulation motor 5, blower fan 6, stainless steel water circulating pump 7, cryostat, 8, water tank 9, hand basket specimen holder 10, cylinder 11, compressor 12, pipe-coil type evaporator 13, condenser 14, electric heater 15, control panel 16, sliding door 17, view window 18, controller.
[embodiment]
Further specify below below in conjunction with accompanying drawing the present invention being done:
As shown in drawings, the present invention includes high temperature casing 1, low temperature casing 2, regulator cubicle 3, electrical system, refrigeration system and heating system, the high temperature box house is provided with heating system, the low temperature box house is provided with refrigeration system, heating system, refrigeration system circuit respectively connects electrical system, be provided with high temperature groove air handling system in the high temperature casing, be provided with the cryostat, circulation system in the low temperature casing, high temperature groove air handling system, cryostat, circulation system circuit respectively connects electrical system, the high temperature casing, be respectively equipped with hand basket kinematic train moving up and down in the low temperature casing, high temperature groove air handling system comprises the high temperature groove, circulation motor 4 and blower fan 5, the circulation motor is installed in the high temperature cabinet exterior, the output terminal of circulation motor connects blower fan, blower fan is installed in the high temperature box house, circulation motor circuit connects electrical system, the cryostat, circulation system comprises cryostat, 7, stainless steel water circulating pump 6 and water tank 8, water tank is arranged on low temperature casing rear side, the stainless steel water circulating pump is installed in the water tank bottom, cryostat, connects the stainless steel water circulating pump by pipeline, stainless steel water circulating pump circuit connects electrical system, be provided with level sensor in the cryostat,, the level sensor circuit connects electrical system.
Among the present invention, the hand basket kinematic train comprises hand basket specimen holder 9 and cylinder 10, and the piston end of cylinder connects the hand basket specimen holder; Refrigeration system comprises compressor 11, evaporator and condenser 13, and evaporator is pipe-coil type evaporator 12, and pipe-coil type evaporator is installed on the low temperature cabinet wall, and compressor, condenser are separately positioned on high temperature casing rear side, and compressor connects electrical system by circuit; Heating system comprises stainless steel support and electric heater 14, and electric heater is installed on the high temperature cabinet wall by stainless steel support, and electric heater connects electrical system by circuit, and electric heater adopts the nichrome wire electric heater; High temperature casing and low temperature casing adopt panel beating to make, and panel beating is made up of shell, outer courage and inner bag, and shell adopts steel plate to make, and outer surface of outer cover is sprayed with plastic layer, and outer courage adopts corrosion resistant plate to make, and inner bag is heat-insulation layer; One side of high temperature casing, low temperature casing connects regulator cubicle, regulator cubicle and high temperature casing, cryogenic box system are integral the formula structure, the front of regulator cubicle is provided with control panel 15, control panel is provided with touch-screen, electrical system is arranged on the rear side of control panel, and electrical system is by the button control zone on the line connection control panel; High temperature casing front end face is provided with sliding door 16, and sliding door is provided with view window 17.
The temperature range of watertight aircase is 60 ℃~180 ℃ among the present invention, and the temperature range of fluid box is 1 ℃~30 ℃, and temperature fluctuation is ± 0.5 ℃, and temperature deviation is ± 2.0 ℃, and the hand basket lifting is≤10S that test temperature is≤5min stabilization time switching time.Interior box lumber matter is the SUS304 corrosion resistant plate, whole box body is divided into upper and lower two districts, be respectively air high-temperature region, liquid sub district, during impulse test, hand basket is according to the programmed control automatic lifting, with the trial target in the hand basket, be exposed in the high-temperature gas or in the cryogenic liquid, thereby reach the fast temperature impact effect; The outer container material is the outer surface plate plastic-blasting; The insulation material is that polyurethane foam plastic connects into an integral body through the High Temperature High Pressure foaming with inner room, shell, low temperature chamber; Hot room insulation material: glass fibre cotton; Controller 18 adopts Japanese imported with original packaging " excellent easy control " brand thermometric instrument, the 7 inches high color lcd touch display screens of Islamic; 100 groups of programs are set preservation arbitrarily; 300 days historical curves can be consulted at any time, download; The band USB, the LAN interface function, can make things convenient for computer carry out online, remote monitoring.Level sensor is high precision PT100 platinum resistance.
In the refrigeration system of the present invention, compressor adopts American-European imported with original packaging compressor, the unit refrigeration; Refrigerant adopts non-fluorine environmental protection refrigerant (Dupont R404A); Condenser adopts band fin high-efficiency air cooling formula condenser; Evaporator is the self-control pipe-coil type evaporator; The refrigeration system accessory has Italian import solenoid valve, Danfoss expansion valve, evaporating pressure regulating valve etc.
In the high temperature groove air handling system, the artificial atmosphere mode adopts forced draft inner equilibrium temperature adjustment method (BTC), the output quantity that the result that control system is exported by the automatic computing of PID according to the temperature spot of setting removes control heater, finally reach a kind of mobile equilibrium, built-in air conditioning room, circulation air path and major axis centrifugal fan, by the air of wind wheel to high-temperature cabinet, carry out forced circulation, the homogeneity of the oven temperature, degree that reaches a high temperature; Type of heating adopts high-quality nichrome wire electric heater; Fan speed regulation adopts frequency control way, and the supply frequency by frequency converter change motor reaches the effect of stepless time adjustment, thereby satisfies different product to the requirement of different wind speed, during impact, transfers fast rotating speed automatically, strengthens air circulation.
In the temperature groove circulation system, ebullator adopts the stainless steel water circulating pump, circulates by the water with cryostat,, and take away the cold that evaporator produces, thereby make the water temperature of cryostat, reach setting value, and even water temperature; Be equipped with level sensor in the excessive low water level protection system, when water level was lower than setting value, machine can be reported to the police automatically and be shut down, and prevents water pump dry tap or electrothermal tube dry combustion method; According to design temperature; controller is regulated the refrigerating capacity of compressor automatically, thereby makes the temperature of cold trap keep constant, when temperature reaches setting value; hot gas bypass valve is opened; regulate refrigerating capacity, temperature is no longer descended, when temperature is lower than 0.5 ℃ of setting value again; compressor shutdown; heating tube is started working, and trace is regulated temperature, and temperature is got back on the temperature spot of setting.
In the hand basket kinematic train, controller output signal is given solenoid valve, and control cylinder moves up and down, and drives wire rope, is delivered on the hand basket by pulley, finally realizes moving up and down of hand basket.
The present invention is not subjected to the restriction of above-mentioned embodiment, and other any do not deviate from change, the modification done under spiritual essence of the present invention and the principle, substitutes, combination, simplify, and all should be the substitute mode of equivalence, is included within protection scope of the present invention.
Claims (10)
1. high and low temperature impulse test case, comprise the high temperature casing, the low temperature casing, regulator cubicle, electrical system, refrigeration system and heating system, described high temperature box house is provided with heating system, described low temperature box house is provided with refrigeration system, described heating system, refrigeration system circuit respectively connects electrical system, it is characterized in that: be provided with high temperature groove air handling system in the described high temperature casing, be provided with the cryostat, circulation system in the described low temperature casing, described high temperature groove air handling system, cryostat, circulation system circuit respectively connects electrical system, described high temperature casing, be respectively equipped with hand basket kinematic train moving up and down in the low temperature casing.
2. high and low temperature impulse test case as claimed in claim 1, it is characterized in that: described high temperature groove air handling system comprises high temperature groove, circulation motor and blower fan, described circulation motor is installed in the high temperature cabinet exterior, the output terminal of described circulation motor connects blower fan, described blower fan is installed in the high temperature box house, and described circulation motor circuit connects electrical system.
3. high and low temperature impulse test case as claimed in claim 1 or 2, it is characterized in that: the described cryostat, circulation system comprises cryostat,, stainless steel water circulating pump and water tank, described water tank is arranged on low temperature casing rear side, described stainless steel water circulating pump is installed in the water tank bottom, described cryostat, connects the stainless steel water circulating pump by pipeline, and described stainless steel water circulating pump circuit connects electrical system.
4. high and low temperature impulse test case as claimed in claim 3 is characterized in that: be provided with level sensor in the described cryostat,, described level sensor circuit connection electrical system.
5. high and low temperature impulse test case as claimed in claim 4, it is characterized in that: described hand basket kinematic train comprises hand basket specimen holder and cylinder, the piston end of described cylinder connects the hand basket specimen holder.
6. high and low temperature impulse test case as claimed in claim 5, it is characterized in that: described refrigeration system comprises compressor, evaporator and condenser, described evaporator is pipe-coil type evaporator, described pipe-coil type evaporator is installed on the low temperature cabinet wall, described compressor, condenser are separately positioned on high temperature casing rear side, and described compressor connects electrical system by circuit.
7. high and low temperature impulse test case as claimed in claim 6, it is characterized in that: described heating system comprises stainless steel support and electric heater, described electric heater is installed on the high temperature cabinet wall by stainless steel support, described electric heater connects electrical system by circuit, and described electric heater adopts the nichrome wire electric heater.
8. high and low temperature impulse test case as claimed in claim 7, it is characterized in that: described high temperature casing and low temperature casing adopt panel beating to make, described panel beating is made up of shell, outer courage and inner bag, described shell adopts steel plate to make, described outer surface of outer cover is sprayed with plastic layer, described outer courage adopts corrosion resistant plate to make, and described inner bag is heat-insulation layer.
9. high and low temperature impulse test case as claimed in claim 8, it is characterized in that: a side of described high temperature casing, low temperature casing connects regulator cubicle, described regulator cubicle and high temperature casing, cryogenic box system are integral the formula structure, the front of described regulator cubicle is provided with control panel, described control panel is provided with touch-screen, described electrical system is arranged on the rear side of control panel, and described electrical system is by the button control zone on the line connection control panel.
10. high and low temperature impulse test case as claimed in claim 9, it is characterized in that: described high temperature casing front end face is provided with sliding door, and described sliding door is provided with view window.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201310300469 CN103335909A (en) | 2013-07-15 | 2013-07-15 | High-low temperature impact test box |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201310300469 CN103335909A (en) | 2013-07-15 | 2013-07-15 | High-low temperature impact test box |
Publications (1)
Publication Number | Publication Date |
---|---|
CN103335909A true CN103335909A (en) | 2013-10-02 |
Family
ID=49244117
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 201310300469 Pending CN103335909A (en) | 2013-07-15 | 2013-07-15 | High-low temperature impact test box |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN103335909A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104122040A (en) * | 2014-07-30 | 2014-10-29 | 中国人民解放军61846部队 | Integrated immersion test device |
CN104549577A (en) * | 2014-12-31 | 2015-04-29 | 江苏兆胜空调有限公司 | All-weather variable-working-condition compensating type high-low-temperature environment simulating test chamber |
CN104792642A (en) * | 2015-05-06 | 2015-07-22 | 重庆超力高科技股份有限公司 | Endurance test device for temperature valve |
CN105954178A (en) * | 2016-04-20 | 2016-09-21 | 上海林频仪器股份有限公司 | Anticorrosive low-humidity walk-in test chamber |
CN106225390A (en) * | 2016-08-31 | 2016-12-14 | 北京瑞尔腾普科技有限公司 | A kind of gas medium high/low temperature heat transfer system |
CN106248716A (en) * | 2016-08-29 | 2016-12-21 | 芜湖凯尔电气科技有限公司 | The detection device of high/low temperature battery |
CN106568656A (en) * | 2016-10-28 | 2017-04-19 | 中国寰球工程有限公司 | Testing device used for detecting component mechanical properties |
CN107036924A (en) * | 2016-11-25 | 2017-08-11 | 防城港市质量技术监督局 | A kind of high-low temperature tester that can be observed |
CN109253940A (en) * | 2018-10-12 | 2019-01-22 | 南昌航空大学 | A kind of experimental provision for turbo blade material heat fatigue |
CN111122639A (en) * | 2020-01-06 | 2020-05-08 | 西南电子技术研究所(中国电子科技集团公司第十研究所) | High-low temperature cycle test system for phase change composite material |
CN112958169A (en) * | 2021-02-18 | 2021-06-15 | 深圳市环测威检测技术有限公司 | Walk-in high-low temperature damp-heat test box |
RU2762902C1 (en) * | 2021-02-04 | 2021-12-23 | Федеральное государственное унитарное предприятие "Центральный научно-исследовательский институт конструкционных материалов "Прометей" имени И.В. Горынина Национального исследовательского центра "Курчатовский институт" (НИЦ "Курчатовский институт" - ЦНИИ КМ "Прометей") | Multifunctional mobile stand |
-
2013
- 2013-07-15 CN CN 201310300469 patent/CN103335909A/en active Pending
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104122040B (en) * | 2014-07-30 | 2016-08-24 | 中国人民解放军61846部队 | Integration dip testing apparatus |
CN104122040A (en) * | 2014-07-30 | 2014-10-29 | 中国人民解放军61846部队 | Integrated immersion test device |
CN104549577A (en) * | 2014-12-31 | 2015-04-29 | 江苏兆胜空调有限公司 | All-weather variable-working-condition compensating type high-low-temperature environment simulating test chamber |
CN104549577B (en) * | 2014-12-31 | 2016-01-13 | 江苏兆胜空调有限公司 | A kind of round-the-clock variable working condition offset-type high-low temperature environment simulation test box |
CN104792642A (en) * | 2015-05-06 | 2015-07-22 | 重庆超力高科技股份有限公司 | Endurance test device for temperature valve |
CN105954178A (en) * | 2016-04-20 | 2016-09-21 | 上海林频仪器股份有限公司 | Anticorrosive low-humidity walk-in test chamber |
CN106248716A (en) * | 2016-08-29 | 2016-12-21 | 芜湖凯尔电气科技有限公司 | The detection device of high/low temperature battery |
CN106225390A (en) * | 2016-08-31 | 2016-12-14 | 北京瑞尔腾普科技有限公司 | A kind of gas medium high/low temperature heat transfer system |
CN106568656A (en) * | 2016-10-28 | 2017-04-19 | 中国寰球工程有限公司 | Testing device used for detecting component mechanical properties |
CN106568656B (en) * | 2016-10-28 | 2024-01-30 | 中国寰球工程有限公司 | Test device for detecting mechanical property of component |
CN107036924A (en) * | 2016-11-25 | 2017-08-11 | 防城港市质量技术监督局 | A kind of high-low temperature tester that can be observed |
CN109253940A (en) * | 2018-10-12 | 2019-01-22 | 南昌航空大学 | A kind of experimental provision for turbo blade material heat fatigue |
CN111122639A (en) * | 2020-01-06 | 2020-05-08 | 西南电子技术研究所(中国电子科技集团公司第十研究所) | High-low temperature cycle test system for phase change composite material |
RU2762902C1 (en) * | 2021-02-04 | 2021-12-23 | Федеральное государственное унитарное предприятие "Центральный научно-исследовательский институт конструкционных материалов "Прометей" имени И.В. Горынина Национального исследовательского центра "Курчатовский институт" (НИЦ "Курчатовский институт" - ЦНИИ КМ "Прометей") | Multifunctional mobile stand |
CN112958169A (en) * | 2021-02-18 | 2021-06-15 | 深圳市环测威检测技术有限公司 | Walk-in high-low temperature damp-heat test box |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN103335909A (en) | High-low temperature impact test box | |
CN204865872U (en) | Proof box of high low temperature reversal | |
CN107788327A (en) | Multi-phase containment, which is realized, does not freeze long fresh method, refrigeration plant and readable storage medium storing program for executing | |
CN107044756B (en) | The anti-freeze control method of air door and refrigerator | |
CN103335908A (en) | Two-box type impact testing box | |
CN204027951U (en) | A kind of cold shock testing machine | |
CN105057010A (en) | Fire extinguishing high and low temperature test chamber with liquid nitrogen | |
CN204787589U (en) | Humidity control device , keep case and refrigerator | |
CN205164765U (en) | Fast temperature change test case of liquid nitrogen auxiliary cooling | |
CN105910366B (en) | Temperature control method for the special refrigerator and the refrigerator of the nearly freezing point refrigeration of fruits and vegetables | |
CN104949466A (en) | Humidity control device, preservation box and refrigerator | |
CN110346665A (en) | A kind of width temperature range low temperature environment testing apparatus | |
CN108132438B (en) | New energy motor high-low temperature test system | |
CN105605858A (en) | Refrigerator and temperature control method for thermostatic chamber in refrigerator | |
KR101269068B1 (en) | Controll method middle and small sized cold storage room | |
CN108061420B (en) | Temperature regulation and control method, temperature regulation and control device, refrigeration equipment and readable storage medium | |
CN206369294U (en) | Clean thermostatic chamber combines temperature-controlling system | |
CN203365357U (en) | Temperature shock test box consisting of gas box and liquid box | |
CN206415135U (en) | Coil pipe refrigeration experiment water tank built in independent heating formula | |
CN110672503A (en) | Energy-saving environment-friendly programmable constant temperature and humidity testing machine | |
CN202692261U (en) | Intake air-conditioning pressure control device | |
CN205537295U (en) | Cooling water minimum temperature automatic control device | |
CN102819280A (en) | Local environment temperature control method and device used for ball disc type friction testing machine | |
CN207367079U (en) | Constant speed groove and constant speed groove constant speed cooling system | |
CN209042851U (en) | A kind of freeze preservation refrigerator |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131002 |