CN107642622A - Chemical experiment water-bath system - Google Patents
Chemical experiment water-bath system Download PDFInfo
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- CN107642622A CN107642622A CN201710932008.5A CN201710932008A CN107642622A CN 107642622 A CN107642622 A CN 107642622A CN 201710932008 A CN201710932008 A CN 201710932008A CN 107642622 A CN107642622 A CN 107642622A
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Abstract
The invention discloses a kind of chemical experiment water-bath system, it is characterised in that：Including insulating box and temperature-sensing valve, constant temperature box outer wall is provided with water leg, and insulating box bottom is provided with temperature-sensitive bag, inflation fluid is loaded with temperature-sensitive bag；Overflow pipe is provided with water leg, overflow pipe upper end is located at the top of water leg and open setting, and overflow pipe lower end is located at water leg bottom and horizontal pipeline section is provided with after bending, and horizontal pipeline section stretches out water leg side wall；Hot water hole is connected with thermal water source by hot-water line, and cold water hole is connected with cold water source by cold water pipe, and water leg side wall is connected with thermometer, and water leg bottom is connected with evacuated tube, and evacuated tube is provided with exhaust-valve.Thermostatic control is carried out using the present invention, it need not be realized using electric-control system, temperature sensor need not be set and compared with setting value and judged water temperature by electric control gear, equipment cost and maintenance cost are greatly reduced compared to conventional like product, is particluarly suitable for the unstable area use of supply of electric power.
Description
Technical field
The present invention relates to chemical experiment technique field, more particularly to a kind of chemical experiment water-bath system.
Background technology
Water bath with thermostatic control is the experimental science such as biology, plant, physics, chemical industry, medical treatment, environmental protection field directly or auxiliary heats
Precision instrument, the control of temperature range is realized by temperature sensor, electric control gear etc..In chemistry teaching and in chemical research
Usually need to use water bath with thermostatic control system.So-called water bath with thermostatic control, do not mean that water temperature absolute constancy is constant, but refer to water
Temperature control system is within the scope of experiment needs.Existing water bath with thermostatic control is all precise electric control equipment, acquisition cost and maintenance cost
It is more high, it is unfavorable for popularization and application.
The content of the invention
It is an object of the invention to provide one kind constant temperature control can be carried out without temperature dependent sensor and electric control gear
The chemical experiment of system water-bath system.
To achieve the above object, chemical experiment of the invention water-bath system includes insulating box and temperature-sensing valve, outside insulating box
Wall is provided with water leg, and insulating box bottom is provided with temperature-sensitive bag, inflation fluid is loaded with temperature-sensitive bag；Overflow pipe is provided with water leg, is overflow
Flow tube upper end is located at the top of water leg and open setting, and overflow pipe lower end is located at water leg bottom and is provided with horizontal tube after bending
Section, horizontal pipeline section stretch out water leg side wall；The outer end of horizontal pipeline section is connected with Overflow drainage flexible pipe；Water leg above overflow pipe
It is connected with bleeder pipe；
Temperature-sensing valve includes valve body, and vertically arranged inner chamber is provided with valve body, and the horizontal cross-section of inner chamber is rounded, and intracavity sidewall slides
Be connected with valve element, valve element includes jacking block, sole piece and the connecting pole being connected between jacking block and sole piece, jacking block and sole piece respectively with it is interior
The sealing of chamber side walls coordinates；Jacking block, sole piece, connecting pole and the side wall of inner chamber surround toroidal cavity；It is provided with the valve body of side
Apopore, apopore is inner to be connected with outlet pipe with the intracavity inter-connection of valve body and its outer end, and outlet pipe is connected with water leg；
The inner inner chamber with valve body of hot water hole and cold water hole, hot water hole and cold water hole are interval with the valve body of apopore opposite side
It is connected, the outer end of hot water hole is connected with hot-water line, and the outer end of cold water hole is connected with cold water pipe；Hot water hole is less than cold water hole；
Stage clip is connected between the top of jacking block and the inner chamber roof of valve body；Sole piece is crimped with downwards push rod, push rod upper diameter
More than lower diameter, push rod top is through valve body and stretches into the inner chamber of valve body, and push rod top coordinates with valve body slides sealing, push rod
Top and sole piece press fit；Fixed seat is provided with below valve body, is provided with vertical through holes in fixed seat, push rod bottom extends downwardly into perpendicular
Cooperation is slidingly sealed to through hole and with the hole wall of vertical through holes；The lower ending opening of vertical through holes is connected with interface, and interface is connected with
Expansion tube, expansion tube stretch into insulating box and are connected with temperature-sensitive bag；
Valve element has upper extreme position and lower limit position, apopore when valve element is between upper extreme position and lower limit position
All the time it is connected with toroidal cavity；Cold water hole and toroidal cavity are fully switched on when valve element is located at upper extreme position, under valve element is located at
Hot water hole and toroidal cavity are fully switched on during extreme position；The height of toroidal cavity be equal between hot water hole and cold water hole away from
From；
Intracavity sidewall at the upper extreme position of valve element is provided with upper locating ring, and the intracavity sidewall at the lower limit position of valve element is provided with
Lower locating ring；
Hot water hole is connected with thermal water source by hot-water line, and cold water hole is connected with cold water source by cold water pipe, and hot-water line is provided with heat
Water valve, cold water pipe are provided with cold valves, and expansion tube is provided with expansion valve；Water leg side wall is connected with thermometer, water leg bottom
Evacuated tube is connected with, evacuated tube is provided with exhaust-valve.
Temperature-sensitive bag is connected with regulation pipe, and regulation pipe stretches out insulating box and is connected with regulating box, and regulation pipe is provided with regulating valve,
Regulating box is higher than temperature-sensitive bag.
Water leg inwall is connected with horizontally disposed water distribution endless tubes, and water distribution endless tubes are connected with outlet pipe, water distribution endless tubes table
Face is uniformly provided with multiple water distributing pores.
The thermal water source is hot water line or boiler or water heater；The cold water source is tap water pipe line or cold water storage cistern,
The inflation fluid is mercury or ethanol.
The fixed seat upper surface is provided with sealing ring around the push rod.
The present invention has the advantage that：
The present invention is simple in construction, easy to control, inflation fluid can be utilized to vary with temperature the characteristic that Volume Changes occur, with reference to bullet
The elastic force of spring, hot water is connected when valve element is less than constant temperature position, cold water is connected when valve element is higher than constant temperature position, so that water presss from both sides
Temperature in set and insulating box keeps constant.The thermostatic control of the present invention need not be realized using electric-control system, warm without setting
Degree sensor simultaneously compared with setting value and is judged water temperature by electric control gear, is greatly reduced and is set compared to conventional like product
Standby cost and maintenance cost, it is particluarly suitable for the unstable area use of supply of electric power.
The setting of regulating valve, the steady temperature that water-bath system provides can be adjusted by controlling to adjust the open degree of valve
Value.When needing to turn down the design temperature of water-bath system, the open degree of regulating valve is turned down, so when the temperature sensing liquid in temperature-sensitive bag
When temperature rises to design temperature after heated, it will there are more temperature sensing liquids to enter in the vertical through holes of fixed seat, promote push rod
Move more distances upwards with valve element, valve element is reached upper extreme position earlier, it means that adjust the open degree of regulating valve
After small, relatively low（Compare before the open degree of regulating valve is turned down）At a temperature of hot water hole may turn off, cold water hole will connect
It is logical, so that cold water is relative（Compare before the open degree of regulating valve is turned down）Water leg is put at relatively low temperature, from
And turn down the set temperature value of water bath with thermostatic control system.With this similarly, after the open degree of regulating valve is tuned up, constant temperature can be heightened
The set temperature value of water-bath system.
In a word, the setting of regulating valve and regulating box so that the present invention can be conveniently adjusted the design temperature of insulating box.
The setting of overflow pipe, the water outlet of water leg bottom can either be ensured and facilitate external connection, and can enough controls water leg
Interior water level, prevent the bad phenomenon of the too low constant temperature effect brought of water level in water leg.
The control process of the present invention is simple and convenient, and operating personnel need not carry out special training, by simply connecting and opening
The operation of closing valve, you can realize the constant temperature angle value of thermostatic control and regulation setting.
The structure of water distribution endless tubes, hot water or cold water can be made to enter water leg with being more uniformly distributed, made warm everywhere in water leg
Degree is more convergent.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of water distribution endless tubes；
Fig. 3 is the structural representation that temperature-sensing valve is engaged with fixed seat when valve element is located at upper extreme position；
Fig. 4 is the structural representation of temperature-sensing valve when valve element is located at lower limit position；
Fig. 5 is the structural representation of temperature-sensing valve when valve element is located at constant temperature position.
Embodiment
As shown in Figures 1 to 5, chemical experiment of the invention includes insulating box 1 and temperature-sensing valve 2, insulating box 1 with water-bath system
Outer wall is provided with water leg 3, and the bottom of insulating box 1 is provided with temperature-sensitive bag 4, inflation fluid 5 is loaded with temperature-sensitive bag 4；It is provided with and overflows in water leg 3
Flow tube 6, the upper end of overflow pipe 6 is located at the top of water leg 3 and open setting, after the lower end of overflow pipe 6 is located at the bottom of water leg 3 and bent
Provided with horizontal pipeline section 7, horizontal pipeline section 7 stretches out the side wall of water leg 3；The outer end of horizontal pipeline section 7 is connected with Overflow drainage flexible pipe 8；Overflow
The water leg 3 of the top of flow tube 6 is connected with bleeder pipe 9；
Temperature-sensing valve 2 includes valve body 10, is provided with vertically arranged inner chamber 11 in valve body 10, the horizontal cross-section of inner chamber 11 is rounded, interior
The side walls of chamber 11 are connected with valve element, and valve element includes jacking block 12, sole piece 13 and the connection being connected between jacking block 12 and sole piece 13
Post 14, jacking block 12 and sole piece 13 seal with the side walls of inner chamber 11 respectively to be coordinated；Jacking block 12, sole piece 13, connecting pole 14 and
The side wall of inner chamber 11 surrounds toroidal cavity 27；Apopore 15 is provided with side valve body 10, apopore 15 is inner interior with valve body 10
Chamber 11 is connected and its outer end is connected with outlet pipe 16, and outlet pipe 16 is connected with water leg 3；The valve body of the opposite side of apopore 15
Hot water hole 17 and cold water hole 18 are interval with 10, hot water hole 17 and the inner of cold water hole 18 are connected with the inner chamber 11 of valve body 10
Logical, the outer end of hot water hole 17 is connected with hot-water line 19, and the outer end of cold water hole 18 is connected with cold water pipe 20；Hot water hole 17 is less than cold water
Hole 18；
Stage clip 21 is connected between the top of jacking block 12 and the roof of inner chamber 11 of valve body 10；Sole piece 13 is crimped with downwards push rod 22,
The upper diameter of push rod 22 is more than lower diameter, and the top of push rod 22 is through valve body 10 and stretches into the inner chamber 11 of valve body 10, on push rod 22
Portion is slidingly sealed cooperation, the top of push rod 22 and the press fit of sole piece 13 with valve body 10；The lower section of valve body 10 is provided with fixed seat 23, fixed
Vertical through holes 24 are provided with seat 23, the bottom of push rod 22 extends downwardly into vertical through holes 24 and is slidingly sealed with the hole wall of vertical through holes 24
Coordinate；The lower ending opening of vertical through holes 24 is connected with interface 25, and interface 25 is connected with expansion tube 26, and expansion tube 26 stretches into insulating box
1 and it is connected with temperature-sensitive bag 4；
Valve element has upper extreme position and lower limit position, apopore when valve element is between upper extreme position and lower limit position
15 are connected with toroidal cavity 27 all the time；Cold water hole 18 and toroidal cavity 27 are fully switched on when valve element is located at upper extreme position, valve
Hot water hole 17 and toroidal cavity 27 are fully switched on when core is located at lower limit position；The height of toroidal cavity 27 be equal to hot water hole 17 with
The distance between cold water hole 18；
The side wall of inner chamber 11 at the upper extreme position of valve element is provided with upper locating ring 28, the side of inner chamber 11 at the lower limit position of valve element
Wall is provided with lower locating ring 29；It is located at lower limit position with the upper press fit of locating ring 28, valve element when valve element is located at upper extreme position
When with the lower press fit of locating ring 29.
Hot water hole 17 is connected with thermal water source 30 by hot-water line 19, and cold water hole 18 is connected with cold water source by cold water pipe 20
31, hot-water line 19 is provided with hot water valve 32, and cold water pipe 20 is provided with cold valves 33, and expansion tube 26 is provided with expansion valve 34；Water presss from both sides
Cover 3 side walls and be connected with thermometer 35, the bottom of water leg 3 is connected with evacuated tube 36, and evacuated tube 36 is provided with exhaust-valve 37.
Temperature-sensitive bag 4 is connected with regulation pipe 38, and regulation pipe 38 stretches out insulating box 1 and is connected with regulating box 39, in regulation pipe 38
Provided with regulating valve 40, regulating box 39 is higher than temperature-sensitive bag 4.Why regulating box 39 is less than temperature-sensitive bag 4 in accompanying drawing 1, is in order to clear
Annexation is expressed on ground, herein the not spatial relation of Expression modulation case 39 and temperature-sensitive bag 4.
The setting of regulating valve 40, the constant temperature that water-bath system provides can be adjusted by controlling to adjust the open degree of valve 40
Angle value.When needing to turn down the design temperature of water-bath system, the open degree of regulating valve 40 is turned down, so when in temperature-sensitive bag 4
When temperature rises to design temperature after temperature sensing liquid is heated, it will have the vertical through holes 24 that more temperature sensing liquids enter fixed seat 23
It is interior, promote push rod 22 and valve element to move more distances upwards, valve element is reached upper extreme position earlier, it means that will adjust
After the open degree of valve 40 is turned down, relatively low（Compare before the open degree of regulating valve 40 is turned down）At a temperature of hot water hole 17 will
Close, cold water hole 18 will be connected, so that cold water is relative（Compare before the open degree of regulating valve 40 is turned down）Relatively low
At a temperature of be put into water leg 3, so as to turn down the set temperature value of water bath with thermostatic control system.With this similarly, by regulating valve 40
After open degree tunes up, the set temperature value of water bath with thermostatic control system can be heightened.
The inwall of water leg 3 is connected with horizontally disposed water distribution endless tubes 41, and water distribution endless tubes 41 are connected with outlet pipe 16, water distribution
The surface of endless tube 41 is uniformly provided with multiple water distributing pores 42.This structure can make hot water or cold water enter water leg 3 with being more uniformly distributed,
Make in water leg 3 that temperature is more convergent everywhere.
The thermal water source 30 is hot water line or boiler or water heater；The cold water source 31 is tap water pipe line or cold water
Case, the inflation fluid 5 are mercury or ethanol.Mercury and ethanol have the larger coefficient of expansion, with its Volume Changes of the change of temperature
It is larger, so as to produce the change of pressure, make valve element that there is relatively large stroke.
The upper surface of fixed seat 23 is provided with sealing ring 43 around the push rod 22, so as to strengthen the sealing property at this.
The invention also discloses using the above-mentioned chemical experiment mechanical constant temperature adjusting method of water-bath system, this method according to
It is secondary to carry out according to the following steps：
First ensure that exhaust-valve 37 and regulating valve 40 are closed, open expansion valve 34, hot water valve 32 and cold valves 33；Will
The openend of Overflow drainage flexible pipe 8 and discharge structure（Such as sewer, gutter, indoor floor drain discharge structure）It is connected；
Laying bracket and experimental apparatus in insulating box 1.
Now temperature not yet raises at temperature-sensitive bag 4, and the small volume of inflation fluid 5 in temperature-sensitive bag 4, valve element is in limit inferior position
Put, the hot water of thermal water source 30 enters water leg 3 by temperature-sensing valve 2, raises the temperature in water leg 3 and insulating box 1；Water leg
When being intake in 3, bleeder pipe 9 discharges gas；
At temperature-sensitive bag 4 after temperature rise, the volumetric expansion of inflation fluid 5, the dilatation of inflation fluid 5 fully enters the perpendicular of fixed seat 23
Into through hole 24, valve element is promoted to move up simultaneously compression press spring 21 by push rod 22；Toroidal cavity 27 in valve element moves up
To constant temperature position during position between cold water hole 18 and hot water hole 17 for valve element, now cold water hole 18 and hot water hole 17 and water outlet
Hole 15 is not communicated with, and valve element can be tested after reaching constant temperature position in insulating box；
Under constant temperature position, if temperature further raises at temperature-sensitive bag 4, the dilatation of caused inflation fluid 5 promotes therewith
Push rod 22 and valve element move up, and so as to connect apopore 15 and cold water hole 18, cold water reduces water leg 3 after entering water leg 3
With the temperature in insulating box 1 so that the volume contraction of inflation fluid 5, after the volume contraction of inflation fluid 5, in the elastic force lower valve of stage clip 21
Core moves downward, until valve element reaches constant temperature position；
Under constant temperature position, if temperature further reduces at temperature-sensitive bag 4, the volume of inflation fluid 5 is shunk therewith, in stage clip 21
Elastic force bottom spool moves downward, and so as to connect apopore 15 and hot water hole 17, hot water raises the He of water leg 3 after entering water leg 3
Temperature in insulating box 1, so that the volumetric expansion of inflation fluid 5, inflation fluid 5 is moved until reaching constant temperature position upwards by valve element
Put；
When the water level in water leg 3 is higher than 6 top of overflow pipe, the water in water leg 3 enters overflow pipe 6 and flowed out.
After the completion of experiment, all hot water valves 32, regulating valve 40, cold valves 33 and expansion valve 34 are closed, opens exhaust-valve 37,
Water in water leg 3 is emptied.
When regulating valve 40 is closed, the dilatation of inflation fluid 5 fully enters the vertical through holes 24 of fixed seat 23
Interior, the temperature value corresponding to the constant temperature position of valve element is minimum thermostat temperature；
When needing to heighten the temperature corresponding to the constant temperature position of valve element, increase the open degree of regulating valve 40, temperature is swollen when raising
The dilatation of swollen liquid 5 is partly into the vertical through holes 24 of fixed seat 23 and another part enters regulating box 39, therefore is worked as
, can not be by valve into the inflation fluid 5 in the vertical through holes 24 of fixed seat 23 when temperature at temperature-sensitive bag 4 reaches minimum thermostat temperature
Core is raised to constant temperature position；When core valve rises to constant temperature position, the inflation fluid 5 in temperature-sensitive bag 4 compares regulating valve 40 and closes shape
State bottom spool generates more dilatations when reaching constant temperature position, so as to heighten the temperature corresponding to the constant temperature position of valve element
Value；
When regulating valve 40 is shown in a fully open operation, into the ratio of the dilatation of the inflation fluid 5 in the vertical through holes 24 of fixed seat 23
Example（Whole dilatations of partial volume increment/inflation fluid 5 of the inflation fluid 5 entered in the vertical through holes 24 of fixed seat 23）
Minimum, the temperature value corresponding to the constant temperature position of valve element is highest thermostat temperature；
Temperature value corresponding to the constant temperature position of valve element higher than minimum thermostat temperature and needs the constant temperature position for turning down valve element right
During the temperature answered, reduce the open degree of regulating valve 40, into the dilatation of the inflation fluid 5 in the vertical through holes 24 of fixed seat 23
Ratio rise, when core valve rises to constant temperature position, the inflation fluid 5 in temperature-sensitive bag 4 compare reduce regulating valve 40 open degree
Front valve core generates less dilatation when reaching constant temperature position, so as to turn down the temperature corresponding to the constant temperature position of valve element
Value；
After operating personnel increase or reduce the open degree of regulating valve 40, the new constant temperature angle value of observation thermometer 35, work as thermometer
When the constant temperature angle value of 35 instructions is less than design temperature, increase the open degree of regulating valve 40；When the constant temperature that thermometer 35 indicates
When angle value is higher than design temperature, reduce the open degree of regulating valve 40, repeat the action of open degree for increasing or reducing regulating valve 40,
Until the constant temperature angle value that thermometer 35 indicates is equal to design temperature.
Wherein, the discharge structure is sewer, indoor floor drain or gutter or municipal drain or foul water tank.
Above example is only to illustrative and not limiting technical scheme, although with reference to above-described embodiment to this hair
It is bright to be described in detail, it will be understood by those within the art that：Still the present invention can be modified or be waited
With replacing, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover the power in the present invention
Among sharp claimed range.
Claims (5)
1. chemical experiment water-bath system, it is characterised in that：Including insulating box and temperature-sensing valve, constant temperature box outer wall is provided with water leg,
Insulating box bottom is provided with temperature-sensitive bag, and inflation fluid is loaded with temperature-sensitive bag；Overflow pipe is provided with water leg, overflow pipe upper end is located at water
At the top of chuck and open setting, overflow pipe lower end is located at water leg bottom and horizontal pipeline section is provided with after bending, and horizontal pipeline section stretches out
Water leg side wall；The outer end of horizontal pipeline section is connected with Overflow drainage flexible pipe；Water leg above overflow pipe is connected with bleeder pipe；
Temperature-sensing valve includes valve body, and vertically arranged inner chamber is provided with valve body, and the horizontal cross-section of inner chamber is rounded, and intracavity sidewall slides
Be connected with valve element, valve element includes jacking block, sole piece and the connecting pole being connected between jacking block and sole piece, jacking block and sole piece respectively with it is interior
The sealing of chamber side walls coordinates；Jacking block, sole piece, connecting pole and the side wall of inner chamber surround toroidal cavity；It is provided with the valve body of side
Apopore, apopore is inner to be connected with outlet pipe with the intracavity inter-connection of valve body and its outer end, and outlet pipe is connected with water leg；
The inner inner chamber with valve body of hot water hole and cold water hole, hot water hole and cold water hole are interval with the valve body of apopore opposite side
It is connected, the outer end of hot water hole is connected with hot-water line, and the outer end of cold water hole is connected with cold water pipe；Hot water hole is less than cold water hole；
Stage clip is connected between the top of jacking block and the inner chamber roof of valve body；Sole piece is crimped with downwards push rod, push rod upper diameter
More than lower diameter, push rod top is through valve body and stretches into the inner chamber of valve body, and push rod top coordinates with valve body slides sealing, push rod
Top and sole piece press fit；Fixed seat is provided with below valve body, is provided with vertical through holes in fixed seat, push rod bottom extends downwardly into perpendicular
Cooperation is slidingly sealed to through hole and with the hole wall of vertical through holes；The lower ending opening of vertical through holes is connected with interface, and interface is connected with
Expansion tube, expansion tube stretch into insulating box and are connected with temperature-sensitive bag；
Valve element has upper extreme position and lower limit position,
Apopore is connected with toroidal cavity all the time when valve element is between upper extreme position and lower limit position；Valve element is positioned at upper
Cold water hole and toroidal cavity are fully switched on during extreme position, and hot water hole connects completely with toroidal cavity when valve element is located at lower limit position
It is logical；The height of toroidal cavity is equal to the distance between hot water hole and cold water hole；
Intracavity sidewall at the upper extreme position of valve element is provided with upper locating ring, and the intracavity sidewall at the lower limit position of valve element is provided with
Lower locating ring；
Hot water hole is connected with thermal water source by hot-water line, and cold water hole is connected with cold water source by cold water pipe, and hot-water line is provided with heat
Water valve, cold water pipe are provided with cold valves, and expansion tube is provided with expansion valve；Water leg side wall is connected with thermometer, water leg bottom
Evacuated tube is connected with, evacuated tube is provided with exhaust-valve.
2. chemical experiment according to claim 1 water-bath system, it is characterised in that：Temperature-sensitive bag is connected with regulation pipe, adjusts
Section pipe stretches out insulating box and is connected with regulating box, and regulation pipe is provided with regulating valve, and regulating box is higher than temperature-sensitive bag.
3. chemical experiment according to claim 1 water-bath system, it is characterised in that：Water leg inwall is connected with level and set
The water distribution endless tubes put, water distribution endless tubes are connected with outlet pipe, and water distribution endless tubes surface is uniformly provided with multiple water distributing pores.
4. chemical experiment according to claim 1 water-bath system, it is characterised in that：The thermal water source be hot water line or
Boiler or water heater；The cold water source is tap water pipe line or cold water storage cistern, and the inflation fluid is mercury or ethanol.
5. chemical experiment according to claim 1 water-bath system, it is characterised in that：The fixed seat upper surface is around institute
State push rod and be provided with sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710932008.5A CN107642622B (en) | 2017-10-10 | 2017-10-10 | Water bath system for chemistry experiments |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710932008.5A CN107642622B (en) | 2017-10-10 | 2017-10-10 | Water bath system for chemistry experiments |
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| CN107642622A true CN107642622A (en) | 2018-01-30 |
| CN107642622B CN107642622B (en) | 2023-04-07 |
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| 张国林，阚锦晴，刁国旺: "自制简易恒温装置" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107860065A (en) * | 2017-11-10 | 2018-03-30 | 西藏世峰高科能源技术有限公司 | Charging pile Control Room air-conditioning system |
| CN107860065B (en) * | 2017-11-10 | 2023-10-24 | 西藏世峰高科能源技术有限公司 | Charging pile monitoring room air conditioning system |
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| CN107642622B (en) | 2023-04-07 |
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