CN114160215A - High-precision high-low temperature high-low pressure environment test box and test method thereof - Google Patents
High-precision high-low temperature high-low pressure environment test box and test method thereof Download PDFInfo
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- CN114160215A CN114160215A CN202111616220.3A CN202111616220A CN114160215A CN 114160215 A CN114160215 A CN 114160215A CN 202111616220 A CN202111616220 A CN 202111616220A CN 114160215 A CN114160215 A CN 114160215A
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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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- 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
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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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
- B01L2300/00—Additional constructional details
- B01L2300/18—Means for temperature control
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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
- B01L2300/00—Additional constructional details
- B01L2300/18—Means for temperature control
- B01L2300/1838—Means for temperature control using fluid heat transfer medium
- B01L2300/185—Means for temperature control using fluid heat transfer medium using a liquid as fluid
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Abstract
The invention provides a high-precision high-low temperature high-low pressure environmental test chamber and an experimental method thereof, which comprise a box body structure, a temperature control system and a pressure control system, wherein the temperature control system and the pressure control system are arranged in the box body structure, the box body structure comprises an experimental chamber, the experimental chamber is designed in a double-layer concentric structure, an interlayer between the double-layer concentric structures forms a liquid channel interlayer, and the temperature control system and the pressure control system are matched with the experimental chamber.
Description
Technical Field
The invention relates to the technical field of environmental test chambers, in particular to a high-precision high-low temperature high-low pressure environmental test chamber and an experimental method thereof.
Background
The environmental test chamber can be applied to product tests needing high pressure, low pressure, high temperature or low temperature, such as testing the influence of different altitudes, water level depths and latitudes on product use or aging. The method is widely applied to the industries of electronics, aviation, energy, chemical engineering and the like.
At present, the industry has a plurality of various environmental test chambers, such as a high-low temperature test chamber, a temperature and humidity test chamber, a low-pressure test chamber, a high-pressure test chamber and the like. The test boxes basically have relatively single functions and few test items, and when a product needs to be tested in multiple ways, the test is carried out on multiple test boxes, so that the cost is high and the space is occupied. In addition, although a test box for testing pressure and temperature simultaneously exists in the market at present, the heater and the evaporator of the test box are both arranged in the air-conditioning box on one side in the test box, and when a low-pressure test is carried out, because the density of air in the box is lower, the heat exchange efficiency with the evaporator and the heater is greatly reduced, on one hand, the heat and the cold in the air-conditioning box cannot be sufficiently and effectively conducted to the inner box, and the temperature uniformity in the box is poor. On the other hand, the refrigerant in the evaporator can not be completely evaporated and returns to the compressor to cause liquid impact, which affects the service life of the compressor.
Some industries, particularly the mobile phone industry, need a test box combining ultra-high precision pressure control and temperature control, and the test box combining pressure and temperature in the current market cannot meet the requirements of the industries in terms of pressure control precision due to the defects of a sensor and a controller.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a high-precision high-low temperature high-low pressure environment test box and an experimental method thereof.
The technical scheme of the invention is as follows:
a high-precision high-low temperature high-low pressure environmental test chamber comprises:
a box structure, a temperature control system and a pressure control system, temperature control system and pressure control system all locates in the box structure, the box structure includes an experiment cabin, the experiment cabin adopts double-deck concentric structure design, just intermediate layer between the double-deck concentric structure constitutes a liquid passage interlayer, temperature control system with pressure control system all with the experiment cabin cooperatees.
In the invention, the temperature control system comprises a temperature controller, and the temperature control system also comprises a compressor, a condenser, a refrigeration electromagnetic valve, a throttling device and an evaporator which are connected in sequence.
In the invention, the temperature control system also comprises a heat conduction oil circulating system, the heat conduction oil circulating system is composed of a circulating pump, an evaporator, a pipeline heater and a liquid storage tank, and the liquid channel interlayer is matched with the heat conduction oil circulating system.
Further, still include a first ball valve, second ball valve, third ball valve, fourth ball valve and stop valve in the thermal conductance oil circulation system, just evaporimeter exit position is equipped with a pressure switch, pipe heater exit position is equipped with a temperature sensor, the third ball valve is located liquid channel interlayer bottom, just the liquid storage pot top is equipped with an oiling valve, and its import position still is equipped with an exhaust-valve, is located the liquid storage pot side still is equipped with a sight glass.
In the invention, the pressure control system comprises an ultrahigh precision pressure controller, the ultrahigh precision pressure controller is provided with three air connecting ports, namely a positive pressure connecting air port, a negative pressure connecting air port and a pressure regulating connecting air port, and the pressure control system also comprises an air compressor, a vacuum pump, a pressure reducing valve, an air compressor electromagnetic valve, a vacuum pump electromagnetic valve, a box electromagnetic valve, a pressure relief electromagnetic valve, an air pressure regulating valve, an automatic pressure relief valve, an air compressor check valve, a vacuum pump check valve, a radiating pipe, a manual pressure relief valve and a pressure gauge which are connected by a pressure resisting pipe.
Further, the positive pressure air receiving port terminal is connected with the air compressor, and the pressure reducing valve, the air pressure electromagnetic valve, the air pressure regulating valve, the automatic pressure relief valve and the air compressor check valve are installed between the ultrahigh-precision pressure controller and the air compressor along the air flow direction.
Furthermore, the negative pressure gas receiving port terminal is connected with the vacuum pump, and the vacuum pump check valve and the vacuum pump electromagnetic valve are arranged between the ultrahigh-precision pressure controller and the vacuum pump along the airflow direction.
Furthermore, the pressure regulating air inlet terminal is connected with the experiment cabin, the ultrahigh-precision pressure controller is arranged between the radiating pipe and the box body electromagnetic valve, and is positioned on the air inlet pipeline of the experiment cabin, and the pressure relief electromagnetic valve, the manual pressure relief valve and the pressure gauge are arranged on the air inlet pipeline of the experiment cabin.
In the invention, the box body structure further comprises a box door arranged in front of the experiment cabin, the box door is connected with the box body structure through a plurality of hinges, a door lock is further arranged on the box door, a base is further arranged at the bottom of the box body structure, a rear unit is arranged on the base, and a power distribution cabinet is arranged at the top of the box body structure.
An experimental method of a high-precision high-low temperature high-low pressure environmental test chamber comprises a temperature control method and a pressure control method:
a) according to the temperature control method, the air temperature control in the inner container is realized by controlling the temperature of heat conduction oil in a heat conduction oil system, and the temperature control of the heat conduction oil is controlled by a refrigerating part and a heating part. Under the drive of the circulating pump, the heat conduction oil enters the evaporator along the pressure-resistant pipe to be refrigerated, enters the pipeline heater 210 to be heated after coming out of the evaporator, and controls the output power of refrigeration and heating through the temperature controller, so that the accurate control of the temperature of the heat conduction oil is realized. And after the heat conduction oil comes out from the pipeline heater, the heat conduction oil enters from the bottom of the liquid channel interlayer, is filled in the whole liquid channel interlayer, and then enters the circulating pump again through the ball valve after coming out from the top to enter the next circulation. When the heat conducting oil is filled, the oil filling valve, the emptying valve and the ball valve are opened, the ball valve is closed, the circulating pump is operated, the oil filling valve, the emptying valve and the first ball valve are closed after the heat conducting oil is added to a proper amount from the oil filling valve, and the second ball valve is opened. Principle of the refrigerating device: the low-temperature low-pressure refrigerant gas is compressed into high-temperature high-pressure gas by the compressor, the high-temperature high-pressure gas is cooled and condensed by the condenser 203 and then is changed into a normal-temperature high-pressure liquid refrigerant, the refrigerant is changed into a low-temperature low-pressure gas-liquid two-phase state after being throttled by the throttling device, the low-temperature low-pressure gas enters the evaporator to absorb heat and is evaporated into low-temperature low-pressure gas, and finally the low-temperature low-pressure gas returns to the compressor and enters the next cycle;
b) according to the pressure control method, a high-precision pressure sensor is arranged in an ultrahigh-precision pressure controller, the ultrahigh-precision pressure controller is provided with a positive pressure connection air port and a negative pressure connection air port which are respectively connected with a high-pressure air source and a low-pressure air source, the pressure in an inner container is accurately controlled through an algorithm of the high-pressure connection air port, the air compressor provides the high-pressure air source for the ultrahigh-precision pressure controller, a pressure reducing valve and an air pressure regulating valve are respectively used for preliminary pressure regulation and fine pressure regulation, an automatic pressure relief valve sets a pressure threshold value, and when the pressure of air coming out of the air pressure regulating valve is too high, the automatic pressure relief valve automatically pops open to prevent the ultrahigh-precision pressure controller from being damaged due to the fact that the pressure of the positive pressure connection air port is too high. The one-way valve of the air compressor is used for preventing the air flow from running backwards. The vacuum pump provides a low-pressure air source for the ultrahigh-precision pressure controller, and the electromagnetic valve of the vacuum pump executes related actions according to the control logic. The pressure regulating and connecting air port of the ultrahigh-precision pressure controller is communicated with the inner container, the pressure inside the inner container is accurately controlled, the radiating pipe is used for preheating or precooling, and the temperature inside the inner container is prevented from being damaged due to overhigh temperature or overlow temperature of the inner container. The mechanical pressure gauge is communicated with the inner container and monitors the pressure inside the inner container in real time. The pressure relief electromagnetic valve is opened when the machine is stopped, so that the normal pressure in the liner is recovered, and when the pressure relief electromagnetic valve is damaged, the normal pressure can be manually recovered by using the manual pressure relief valve.
Compared with the prior art, the invention has the beneficial effects that:
the invention combines various experimental functions of high air pressure, low air pressure, high and low temperature and the like through the temperature control system and the pressure control system, so that one device has the functions of various machines, the cost and the space are saved, meanwhile, the temperature of the test box is controlled in a mode of controlling the temperature by filling the interlayer of the inner box with liquid, heat exchange is not needed to be carried out through forced convection heat exchange with the air of the inner box, and the problems of insufficient heat exchange, liquid impact of a compressor and the like under the low-pressure test condition are solved. In addition, the uniformity of the temperature of the inner box is improved by wrapping the inner box with liquid at the same temperature for heat exchange, particularly under the condition of low pressure, the effect is obvious, the pressure and the temperature are respectively controlled by independent controllers, the controllers with ultrahigh precision levels used by the pressure controllers are controlled, and then the operation is carried out on the same man-machine interaction picture in a unified manner by a communication mode. In this way, the requirement that some industries need a test box combining ultra-high precision pressure control and temperature control at present is met.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is an internal structure diagram of a high-precision high-low temperature high-low pressure environmental test chamber provided by the invention;
FIG. 2 is an external structural view of a high-precision high-low temperature high-low pressure environmental test chamber;
FIG. 3 is a schematic structural diagram of the temperature control system;
fig. 4 is a schematic structural diagram of the pressure control system.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Examples
Referring to fig. 1 to fig. 4, the high-precision high-temperature, low-temperature, high-pressure and low-pressure environmental test chamber provided in this embodiment includes:
the device comprises a box body structure 1, a temperature control system 2 and a pressure control system 3, wherein the temperature control system 2 and the pressure control system 3 are arranged in the box body structure 1, the box body structure 1 comprises an experiment chamber 101, the experiment chamber 101 is designed in a double-layer concentric structure, an interlayer between the double-layer concentric structures forms a liquid channel interlayer 212, and the temperature control system 2 and the pressure control system 3 are matched with the experiment chamber 101.
In this embodiment, the temperature control system 2 includes a temperature controller 201, and the temperature control system 201 further includes a compressor 202, a condenser 203, a refrigeration solenoid valve 204, a throttling device 205 and an evaporator 206 connected in sequence.
In this embodiment, the temperature control system 2 further includes a thermal oil circulation system, which is composed of a circulation pump 207, an evaporator 206, a pipe heater 210, and a liquid storage tank 213, and the liquid channel barrier 212 is matched with the thermal oil circulation system.
Furthermore, the heat conducting oil circulating system further comprises a first ball valve 217, a second ball valve 218, a third ball valve 219, a fourth ball valve 220 and a stop valve 209, a pressure switch 208 is arranged at the outlet of the evaporator 206, a temperature sensor 211 is arranged at the outlet of the pipe heater 210, the third ball valve 219 is arranged at the bottom of the liquid channel interlayer 212, an oil filling valve 214 is arranged at the top of the liquid storage tank 213, an emptying valve 215 is arranged at the inlet of the liquid storage tank 213, and a liquid viewing mirror 216 is arranged at the side edge of the liquid storage tank 213.
In this embodiment, the pressure control system 3 includes an ultra-high precision pressure controller 301, the ultra-high precision pressure controller 301 has three air ports, which are a positive pressure connection air port, a negative pressure connection air port and a pressure adjustment connection air port, and the pressure control system 3 further includes an air compressor 302, a vacuum pump 303, a pressure reducing valve 304, an air compressor solenoid valve 305, a vacuum pump solenoid valve 306, a box solenoid valve 307, a pressure relief solenoid valve 308, an air pressure adjustment valve 309, an automatic pressure relief valve 310, an air compressor check valve 311, a vacuum pump check valve 312, a heat dissipation pipe 313, a manual pressure relief valve 314 and a pressure gauge 315, which are connected by a pressure-resistant pipe.
Further, the positive pressure air inlet terminal is connected with the air compressor 302, and a pressure reducing valve 304, an air pressure electromagnetic valve 305, an air pressure regulating valve 390, an automatic pressure relief valve 310 and an air compressor check valve 311 are arranged between the ultrahigh-precision pressure controller 301 and the air compressor 302 along the air flow direction.
Furthermore, the negative pressure gas inlet terminal is connected with a vacuum pump 303, and a vacuum pump check valve 312 and a vacuum pump electromagnetic valve 306 are installed between the ultrahigh-precision pressure controller 301 and the vacuum pump 303 along the airflow direction.
Furthermore, the pressure-regulating air inlet terminal is connected to the experiment chamber 101, a heat dissipation pipe 313 and a box body electromagnetic valve 307 are arranged between the ultra-high precision pressure controller 301 and the experiment chamber 101, and a pressure relief electromagnetic valve 308, a manual pressure relief valve 314 and a pressure gauge 315 are arranged on an air inlet pipeline of the experiment chamber 101.
In this embodiment, the box structure 1 further includes a box door 102 disposed in front of the experiment chamber, the box door 102 is connected to the box structure 1 through a plurality of hinges 106, the box door 102 is further provided with a door lock 107, the bottom of the box structure 1 is further provided with a base 103, the base 103 is provided with a rear unit 104, and the top of the box structure 1 is provided with a power distribution cabinet 105.
An experimental method of a high-precision high-low temperature high-low pressure environmental test chamber comprises a temperature control method and a pressure control method:
according to the temperature control method, the temperature of air in the inner container 101 is controlled by controlling the temperature of heat conduction oil in a heat conduction oil system, and the temperature control of the heat conduction oil is controlled by a refrigerating part and a heating part. Under the drive of the circulating pump 207, the heat conduction oil enters the evaporator 206 along the pressure-resistant pipe to be refrigerated, enters the pipeline heater 210 to be heated after coming out of the evaporator 206, and controls the output power of refrigeration and heating through the temperature controller 201, so that the accurate control of the temperature of the heat conduction oil is realized. The heat conducting oil enters from the bottom of the liquid channel interlayer 212 after coming out of the pipeline heater 210, fills the whole liquid channel interlayer 212, and enters the circulating pump 207 again through the second ball valve 218 after coming out from the top to enter the next circulation. When the conduction oil is filled, the oil filling valve 214, the emptying valve 215 and the first ball valve 217 are opened, the second ball valve 218 is closed, the circulating pump 207 is operated, the conduction oil is filled to an appropriate amount from the oil filling valve 214, the emptying valve 215 and the first ball valve 217 are closed, and the second ball valve 218 is opened. Principle of the refrigerating device: the low-temperature low-pressure refrigerant gas is compressed into high-temperature high-pressure gas by the compressor 202, is cooled and condensed by the condenser 203 to become a normal-temperature high-pressure liquid refrigerant, is throttled by the throttling device 205, is changed into a low-temperature low-pressure gas-liquid two-phase state, enters the evaporator 206 to absorb heat, is evaporated into low-temperature low-pressure gas, finally returns to the compressor, and enters the next cycle.
According to the pressure control method, a high-precision pressure sensor is arranged in an ultrahigh-precision pressure controller 301, the ultrahigh-precision pressure controller is provided with a positive pressure connection air port and a negative pressure connection air port which are respectively connected with a high-pressure air source and a low-pressure air source, the pressure in an inner container 101 is accurately controlled through an algorithm of the high-pressure sensor, the air compressor 302 provides the high-pressure air source for the ultrahigh-precision pressure controller 301, a pressure reducing valve 304 and an air pressure regulating valve 309 respectively perform primary pressure regulating and fine pressure regulating, an automatic pressure relief valve 310 sets a pressure threshold value, when the pressure of air from the air pressure regulating valve 309 is too high, the automatic pressure relief valve 310 automatically pops open, and damage to the ultrahigh-precision pressure controller 301 due to the fact that the pressure of the positive pressure connection air port is too high is prevented. The air compressor check valve 311 is used to prevent the reverse flow of air. The vacuum pump 303 provides a source of low pressure gas to the ultra-high accuracy pressure controller 301 and the vacuum pump solenoid valve 306 performs the associated actions according to the control logic. The pressure regulating air port of the ultra-high precision pressure controller 301 is communicated with the inner container 101, the internal pressure of the inner container 101 is precisely controlled, and the heat dissipation pipe 313 is used for preheating or precooling to prevent the temperature in the inner container 101 from being too high or too low to damage the ultra-high precision pressure controller 301. The mechanical pressure gauge 315 is communicated with the inner container 101 to monitor the internal pressure of the inner container 101 in real time. The pressure relief solenoid valve 308 is opened when the machine is stopped, so that the normal pressure in the liner 101 is recovered, and when the pressure relief solenoid valve 308 is damaged, the normal pressure can be manually recovered by using the manual pressure relief valve 314.
While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (10)
1. The utility model provides a high low temperature high low pressure environmental test case of high accuracy, its characterized in that, includes a box structure, a temperature control system and a pressure control system, temperature control system and pressure control system all locates in the box structure, the box structure includes an experiment cabin, the experiment cabin adopts double-deck concentric structure design, just intermediate layer between the double-deck concentric structure constitutes a liquid passage interlayer, temperature control system with pressure control system all with the experiment cabin cooperatees.
2. A high-precision high-low temperature high-low pressure environmental test chamber as recited in claim 1, wherein said temperature control system comprises a temperature controller, said temperature control system further comprises a compressor, a condenser, a refrigeration solenoid valve, a throttling device and an evaporator connected in sequence.
3. The environmental test chamber of claim 1, further comprising a heat conducting oil circulating system in the temperature control system, wherein the heat conducting oil circulating system comprises a circulating pump, an evaporator, a pipe heater and a liquid storage tank, and the liquid channel barrier is engaged with the heat conducting oil circulating system.
4. The high-precision high-low temperature high-low pressure environmental test chamber according to claim 3, wherein the heat-conducting oil circulating system further comprises a first ball valve, a second ball valve, a third ball valve, a fourth ball valve and a stop valve, the evaporator outlet is provided with a pressure switch, the pipeline heater outlet is provided with a temperature sensor, the third ball valve is arranged at the bottom of the liquid channel interlayer, the top of the liquid storage tank is provided with an oil filling valve, the inlet is provided with an exhaust valve, and the side of the liquid storage tank is provided with a liquid viewing mirror.
5. The environmental test chamber of claim 1, wherein the pressure control system comprises an ultra-high precision pressure controller, the ultra-high precision pressure controller is provided with three air ports, namely a positive pressure air port, a negative pressure air port and a pressure regulating air port, and the pressure control system further comprises an air compressor, a vacuum pump, a pressure reducing valve, an air compressor solenoid valve, a vacuum pump solenoid valve, a box solenoid valve, a pressure relief solenoid valve, an air pressure regulating valve, an automatic pressure relief valve, an air compressor check valve, a vacuum pump check valve, a heat dissipation pipe, a manual pressure relief valve and a pressure gauge, which are connected by a pressure resistant pipe.
6. The high-precision high-low temperature high-low pressure environmental test chamber according to claim 5, wherein the positive pressure air port terminal is connected with the air compressor, and the pressure reducing valve, the air pressure solenoid valve, the air pressure regulating valve, the automatic pressure relief valve and the air compressor check valve are installed between the ultrahigh-precision pressure controller and the air compressor along the air flow direction.
7. A high-precision high-low temperature high-low pressure environmental test chamber as claimed in claim 5, wherein said negative pressure connection air port terminal is connected to said vacuum pump, and said vacuum pump check valve and vacuum pump solenoid valve are installed between said ultra-high precision pressure controller and said vacuum pump along the air flow direction.
8. The environmental test chamber of claim 5, wherein said pressure regulating port is connected to said test chamber, said heat dissipation pipe and said box body solenoid valve are disposed between said ultra-high precision pressure controller and said test chamber, and said test chamber air inlet pipeline is provided with a pressure relief solenoid valve, a manual pressure relief valve and a pressure gauge.
9. The high-precision high-low temperature high-low pressure environmental test chamber according to claim 1, wherein the chamber structure further comprises a chamber door disposed in front of the test chamber, the chamber door is connected to the chamber structure through a plurality of hinges, the chamber door is further provided with a door lock, a base is further provided at the bottom of the chamber structure, a rear unit is provided on the base, and a power distribution cabinet is provided at the top of the chamber structure.
10. An experimental method of a high-precision high-low temperature high-low pressure environmental test chamber is characterized by comprising a temperature control method and a pressure control method:
a) according to the temperature control method, the air temperature control in the inner container is realized by controlling the temperature of heat conduction oil in a heat conduction oil system, and the temperature control of the heat conduction oil is controlled by a refrigerating part and a heating part. Under the drive of the circulating pump, the heat conduction oil enters the evaporator along the pressure-resistant pipe to be refrigerated, enters the pipeline heater 210 to be heated after coming out of the evaporator, and controls the output power of refrigeration and heating through the temperature controller, so that the accurate control of the temperature of the heat conduction oil is realized. And after the heat conduction oil comes out from the pipeline heater, the heat conduction oil enters from the bottom of the liquid channel interlayer, is filled in the whole liquid channel interlayer, and then enters the circulating pump again through the ball valve after coming out from the top to enter the next circulation. When the heat conducting oil is filled, the oil filling valve, the emptying valve and the ball valve are opened, the ball valve is closed, the circulating pump is operated, the oil filling valve, the emptying valve and the first ball valve are closed after the heat conducting oil is added to a proper amount from the oil filling valve, and the second ball valve is opened. Principle of the refrigerating device: the low-temperature low-pressure refrigerant gas is compressed into high-temperature high-pressure gas by the compressor, the high-temperature high-pressure gas is cooled and condensed by the condenser 203 and then is changed into a normal-temperature high-pressure liquid refrigerant, the refrigerant is changed into a low-temperature low-pressure gas-liquid two-phase state after being throttled by the throttling device, the low-temperature low-pressure gas enters the evaporator to absorb heat and is evaporated into low-temperature low-pressure gas, and finally the low-temperature low-pressure gas returns to the compressor and enters the next cycle;
b) according to the pressure control method, a high-precision pressure sensor is arranged in an ultrahigh-precision pressure controller, the ultrahigh-precision pressure controller is provided with a positive pressure connection air port and a negative pressure connection air port which are respectively connected with a high-pressure air source and a low-pressure air source, the pressure in an inner container is accurately controlled through an algorithm of the high-pressure connection air port, the air compressor provides the high-pressure air source for the ultrahigh-precision pressure controller, a pressure reducing valve and an air pressure regulating valve are respectively used for preliminary pressure regulation and fine pressure regulation, an automatic pressure relief valve sets a pressure threshold value, and when the pressure of air coming out of the air pressure regulating valve is too high, the automatic pressure relief valve automatically pops open to prevent the ultrahigh-precision pressure controller from being damaged due to the fact that the pressure of the positive pressure connection air port is too high. The one-way valve of the air compressor is used for preventing the air flow from running backwards. The vacuum pump provides a low-pressure air source for the ultrahigh-precision pressure controller, and the electromagnetic valve of the vacuum pump executes related actions according to the control logic. The pressure regulating and connecting air port of the ultrahigh-precision pressure controller is communicated with the inner container, the pressure inside the inner container is accurately controlled, the radiating pipe is used for preheating or precooling, and the temperature inside the inner container is prevented from being damaged due to overhigh temperature or overlow temperature of the inner container. The mechanical pressure gauge is communicated with the inner container and monitors the pressure inside the inner container in real time. The pressure relief electromagnetic valve is opened when the machine is stopped, so that the normal pressure in the liner is recovered, and when the pressure relief electromagnetic valve is damaged, the normal pressure can be manually recovered by using the manual pressure relief valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111616220.3A CN114160215A (en) | 2021-12-27 | 2021-12-27 | High-precision high-low temperature high-low pressure environment test box and test method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111616220.3A CN114160215A (en) | 2021-12-27 | 2021-12-27 | High-precision high-low temperature high-low pressure environment test box and test method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN114160215A true CN114160215A (en) | 2022-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111616220.3A Pending CN114160215A (en) | 2021-12-27 | 2021-12-27 | High-precision high-low temperature high-low pressure environment test box and test method thereof |
Country Status (1)
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| CN (1) | CN114160215A (en) |
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2021
- 2021-12-27 CN CN202111616220.3A patent/CN114160215A/en active Pending
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