CN109999926B - Anti-frosting high-low temperature alternating damp-heat test box - Google Patents
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- 238000012360 testing method Methods 0.000 title claims abstract description 50
- 239000003507 refrigerant Substances 0.000 claims abstract description 109
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 238000005057 refrigeration Methods 0.000 claims abstract description 41
- 238000007791 dehumidification Methods 0.000 claims abstract description 31
- 230000001172 regenerating effect Effects 0.000 claims abstract description 24
- 238000001035 drying Methods 0.000 claims abstract description 22
- 239000002826 coolant Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 5
- 238000002474 experimental method Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
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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
- B01L2300/00—Additional constructional details
- B01L2300/10—Means to control humidity and/or other gases
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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
- B01L2300/1894—Cooling means; Cryo cooling
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Abstract
The invention provides an anti-frosting high-low temperature alternating damp-heat test box which comprises a regenerative compressed air refrigeration cycle system and a secondary refrigerant dehumidification system, wherein the regenerative compressed air refrigeration cycle system comprises a compressor (1), an oil separator (2), a condenser (3), a first drying filter (4), a second drying filter (6) and a regenerative refrigeration unit, and the secondary refrigerant dehumidification system comprises a first electromagnetic control valve (7), a first throttler (10), a secondary refrigerant water tank (13), a fourth electromagnetic control valve (14), a ball valve (15), a fifth electromagnetic control valve (17), a sixth electromagnetic control valve (18), a dehumidification evaporator (19) and a pump (16). The invention can not only carry out high temperature and high humidity test experiments, but also has the characteristics that the evaporator can not frost and can carry out low temperature and low humidity test experiments for a long time.
Description
Technical Field
The invention relates to the technical field of test equipment, in particular to an anti-frosting high-low temperature alternating damp-heat test box.
Background
The high-low temperature alternating damp-heat test box is experimental equipment for providing environments such as constant temperature and variable temperature for material equipment. Most of industrially common high-low temperature box equipment has the temperature lower limit of about-70 ℃, and is widely applied to the fields of aviation, aerospace, electronics, national defense, scientific research and the like. In order to enable the high-low temperature alternating damp-heat test box to meet multiple purposes, the existing test box comprises a refrigerating system, a heating system, a control system, a humidity system, an air circulation system, a sensor system and the like, so that the temperature and the humidity in the test box can meet various experimental requirements and can be kept constant, and various high-low temperature tests and humidity tests can be completed.
After the existing popular high-low temperature alternating damp-heat test box works for a period of time under constant humidity control, frost can be formed on an evaporator to influence cold-heat exchange, so that the temperature and the humidity in the test box can not meet the experimental requirements. Therefore, the existing high-low temperature alternating damp-heat test box can only meet the requirements of high-temperature test experiments but can not meet the requirements of long-time low-temperature and low-humidity test experiments.
There are many methods of dehumidification, the most common being freeze dehumidification and solid desiccant dehumidification. The freezing dehumidification method is to condense water vapor in the air of the working chamber into water or frost, and the dehumidification effect is affected if the frost is formed due to the long test process of the high-low temperature alternating humid heat test box, so that the phenomenon is avoided. To solve this phenomenon, the evaporator temperature should be controlled to 0 ℃ or higher and the dew point temperature or lower, generally about 7 ℃. When a lower dew point is required, further moisture absorption is usually achieved with solid moisture absorbers. The surface vapor pressure of the moisture absorbent is in the order of hundreds to tens of ppm, and the dew point temperature of about-70 ℃ can be obtained. This method is inconvenient to use or expensive to purchase specialized equipment. Only when there are some tests with special requirements.
Patent document CN 201543429U discloses a high-low temperature alternating humidity-heat test chamber, which includes a refrigeration system, a heating system, a humidification system and an electrical system, wherein the refrigeration system is disposed at the lower part of the test chamber, the humidification system is disposed at the right side of the test chamber, the heating system is connected with the humidification system, and the electrical system is disposed on the inner surface of the right side of the test chamber. Compared with the prior art, the utility model has the advantages of energy saving and consumption reduction function, observation window adopt multilayer cavity toughened glass, prevent that the observation window from dewing, have transparent, thermal-insulated, the difficult steam that produces frosts advantage, conveniently through the circumstances in the observation window observation box, the incasement illumination adopts the fluorescent lamp illumination, and the vision is soft bright, can clearly observe the test process, and reduces power consumption. This solution does not solve the problem of the cold-heat exchange being affected by the frost formation on the evaporator.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an anti-frosting high-low temperature alternating damp-heat test box.
The anti-frosting high-low temperature alternating damp-heat test box comprises a regenerative compressed air refrigeration circulating system and a secondary refrigerant dehumidification system, wherein the regenerative compressed air refrigeration circulating system comprises a compressor, an oil separator, a condenser, a first drying filter, a second drying filter and a regenerative refrigeration unit, and the secondary refrigerant dehumidification system comprises a first electromagnetic control valve, a first throttler, a secondary refrigerant water tank, a fourth electromagnetic control valve, a ball valve, a fifth electromagnetic control valve, a sixth electromagnetic control valve, a dehumidification evaporator and a pump;
the outlet of the compressor is connected with the inlet of the oil separator, the outlet of the oil separator is connected with the inlet of the condenser, the outlet of the condenser is connected with the inlet of the drying filter, the outlet of the first drying filter is connected with the regenerative refrigeration unit and the second drying filter, the outlet of the second drying filter is sequentially connected with the inlet of a first electromagnetic control valve and the inlet of a first throttler, the outlet of the first throttler is respectively connected with the inlet of a fourth electromagnetic control valve and a secondary refrigerant water tank, the outlet of the fourth electromagnetic control valve is connected with the inlet of a ball valve, the outlet of the ball valve and the secondary refrigerant water tank are connected with a regenerative refrigeration unit, the secondary refrigerant water tank is connected with the inlet of a pump, the outlet of the pump is respectively connected with the inlet of a fifth electromagnetic control valve and the inlet of a sixth electromagnetic control valve, the outlet of the fifth electromagnetic control valve is connected with the secondary refrigerant water tank, the outlet of the sixth electromagnetic control valve is connected with; and the oil return port of the oil separator is connected with the inlet of the compressor.
Preferably, the regenerative refrigeration unit comprises a heat exchanger, a second electromagnetic control valve, a third electromagnetic control valve, a second restrictor, a third restrictor and a refrigeration evaporator, wherein the outlet of the first dry filter is connected with the heat exchanger, the heat exchanger is connected with the inlet of the second dry filter, the outlet of the second dry filter is respectively connected with the inlet of the first electromagnetic control valve, the inlet of the second electromagnetic control valve and the inlet of the third electromagnetic control valve, the outlet of the second electromagnetic control valve is connected with the inlet of the second restrictor, the outlet of the third electromagnetic control valve is connected with the inlet of the third restrictor, the outlet of the second restrictor and the outlet of the third restrictor are connected with the inlet of the refrigeration evaporator, the outlet of the refrigeration evaporator is respectively connected with a secondary refrigerant water tank, an outlet of a ball valve.
Preferably, the heat exchanger comprises a forward flow refrigerant pipeline and a return flow refrigerant pipeline, an inlet of the forward flow refrigerant pipeline of the heat exchanger is connected with an outlet of the first dry filter, an outlet of the forward flow refrigerant pipeline of the heat exchanger is connected with an inlet of the second dry filter, inlets of the return flow refrigerant pipelines of the heat exchanger are respectively connected with an outlet of the refrigeration evaporator, a secondary refrigerant water tank and an outlet of the ball valve, and an outlet of the return flow refrigerant pipeline of the heat exchanger is connected with an inlet of the compressor.
Preferably, the secondary refrigerant water tank comprises a refrigerant pipeline and a secondary refrigerant pipeline, an inlet of the refrigerant pipeline of the secondary refrigerant water tank is connected with an outlet of the first throttler, an outlet of the refrigerant pipeline of the secondary refrigerant water tank is connected with an inlet of a return flow refrigerant pipeline of the heat exchanger, inlets of the secondary refrigerant pipelines of the secondary refrigerant water tank are respectively connected with an outlet of the dehumidification evaporator and an outlet of the fifth electromagnetic control valve, and an outlet of the secondary refrigerant pipeline of the secondary refrigerant water tank is connected with an inlet of the pump.
Preferably, the anti-frosting high-low temperature alternating humid heat test box adopts a binary or more than binary non-azeotropic mixed working medium as a refrigerant.
Preferably, the coolant tank can store the cooling capacity and adjust the temperature of the coolant entering the dehumidification evaporator, and the fifth electromagnetic control valve and the sixth electromagnetic control valve can adjust the flow of the coolant entering the dehumidification evaporator.
Preferably, the ball valve can adjust the cooling capacity entering the coolant tank, and the cooling capacity entering the coolant tank is adjusted by adjusting the opening degree of the ball valve.
Preferably, the first restrictor, the second restrictor and the third restrictor adopt manual throttles, automatic throttles or capillary tubes.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts a multi-element mixed working medium as a refrigerant, can realize low-temperature refrigeration below-70 ℃ by adopting a single compressor, adopts a secondary refrigerant dehumidification system, controls the refrigerating capacity entering a secondary refrigerant water tank by controlling the opening degree of a ball valve, controls the temperature of the secondary refrigerant water tank to be between 4 and 7 ℃, and ensures that a dehumidification evaporator has good dehumidification performance under the conditions of high temperature and low temperature and does not frost.
2. Aiming at the condition of constant high humidity, the output of the humidifier can be effectively reduced by opening the fifth electromagnetic control valve at regular time and closing the sixth electromagnetic control valve.
3. The invention can not only carry out high-temperature test experiments, but also has the characteristics that the evaporator can not frost and can carry out low-temperature and low-humidity test experiments for a long time.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural diagram of the present invention.
The figures show that:
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The invention aims to provide an anti-frosting high-low temperature alternating damp-heat test box which can be used for carrying out a high-temperature test experiment and has the characteristics that an evaporator cannot be frosted and a low-temperature test experiment can be carried out for a long time. Because the secondary refrigerant is used for dehumidification, the opening of the ball valve 15 is adjusted to control the refrigerating capacity of the secondary refrigerant, the low-temperature refrigerating capacity can be stored through the secondary refrigerant water tank 13, the temperature of the secondary refrigerant entering the dehumidification evaporator 19 is controlled to be 4-7 ℃, the anti-frosting alternating humid heat test box disclosed by the invention is used for carrying out a test experiment in a high-temperature environment, the dehumidification effect can meet the requirement in a high-temperature and low-temperature environment, and the evaporator cannot be frosted necessarily due to the fact that the temperature of the secondary refrigerant is controlled to be 4-7 ℃ and higher than the freezing point, so that no problem exists when the high-temperature and low-temperature constant humidity; for the constant high humidity condition, the humidifier output can be effectively reduced by opening the fifth electromagnetic control valve 17 at regular time and closing the sixth electromagnetic valve.
The invention relates to an improvement on a high-low temperature alternating damp-heat test box, which utilizes a mixed refrigerant regenerative refrigeration cycle to replace the traditional bipolar compression cycle, simultaneously uses a secondary refrigerant water tank 13 to store refrigeration capacity and control the temperature of the secondary refrigerant entering a dehumidifying evaporator 19, controls the flow of the secondary refrigerant entering the dehumidifying evaporator 19 through an electromagnetic control valve, has simple structure and reliable operation, can carry out high-low temperature test experiments, and has the characteristics that the dehumidifying evaporator cannot frost, has low limit relative humidity and can carry out low-temperature test experiments for a long time.
According to the anti-frosting high-low temperature alternating damp-heat test box provided by the invention, as shown in fig. 1, the anti-frosting high-low temperature alternating damp-heat test box comprises a regenerative compressed air refrigeration cycle system and a secondary refrigerant dehumidification system, wherein the regenerative compressed air refrigeration cycle system comprises a compressor 1, an oil separator 2, a condenser 3, a first drying filter 4, a second drying filter 6 and a regenerative refrigeration unit, and the secondary refrigerant dehumidification system comprises a first electromagnetic control valve 7, a first throttler 10, a secondary refrigerant water tank 13, a fourth electromagnetic control valve 14, a ball valve 15, a fifth electromagnetic control valve 17, a sixth electromagnetic control valve 18, a dehumidification evaporator 19 and a pump 16;
the outlet of the compressor 1 is connected with the inlet of the oil separator 2, the outlet of the oil separator 2 is connected with the inlet of the condenser 3, the outlet of the condenser 3 is connected with the inlet of the dry filter 4, the outlet of the first dry filter 4 is connected with the regenerative refrigeration unit and the second dry filter 6, the outlet of the second dry filter 6 is sequentially connected with the inlet of the first electromagnetic control valve 7 and the inlet of the first throttler 10, the outlet of the first throttler 10 is respectively connected with the inlet of the fourth electromagnetic control valve 14 and the secondary refrigerant water tank 13, the outlet of the fourth electromagnetic control valve 14 is connected with the inlet of the ball valve 15, the outlet of the ball valve 15 and the secondary refrigerant water tank 13 are connected with the regenerative refrigeration unit, the secondary refrigerant water tank 13 is connected with the inlet of the pump 16, the outlet of the pump 16 is respectively connected with the inlet of the fifth electromagnetic control valve 17 and the inlet of the sixth electromagnetic control valve, the outlet of the dehumidification evaporator 19 is connected with the secondary refrigerant water tank 13; and an oil return port of the oil separator 2 is connected with an inlet of the compressor 1. Preferably, the anti-frosting high-low temperature alternating humid heat test chamber is 500L; the regenerative compressed air refrigeration cycle system adopts a mixed refrigerant regenerative refrigeration cycle system.
The regenerative refrigeration unit comprises a heat exchanger 5, a second electromagnetic control valve 8, a third electromagnetic control valve 9, a second throttler 11, a third throttler 12 and a refrigeration evaporator 20, wherein the outlet of the first drying filter 4 is connected with the heat exchanger 5, the heat exchanger 5 is connected with the inlet of the second drying filter 6, the outlet of the second drying filter 6 is respectively connected with the inlet of the first electromagnetic control valve 7, the inlet of the second electromagnetic control valve 8 and the inlet of the third electromagnetic control valve 9, the outlet of the second electromagnetic control valve 8 is connected with the inlet of the second throttler 11, the outlet of the third electromagnetic control valve 9 is connected with the inlet of the third throttler 12, the outlet of the second throttler 11 and the outlet of the third throttler 12 are connected with the inlet of the refrigeration evaporator 20, the outlet of the refrigeration evaporator 20 is respectively connected with a secondary refrigerant water tank 13, the outlet of.
The heat exchanger 5 comprises a forward flow refrigerant pipeline and a return flow refrigerant pipeline, an inlet of the forward flow refrigerant pipeline of the heat exchanger 5 is connected with an outlet of the first drying filter 4, an outlet of the forward flow refrigerant pipeline of the heat exchanger 5 is connected with an inlet of the second drying filter 6, inlets of the return flow refrigerant pipelines of the heat exchanger 5 are respectively connected with an outlet of the refrigeration evaporator 20, an outlet of the secondary refrigerant water tank 13 and an outlet of the ball valve 15, and an outlet of the return flow refrigerant pipeline of the heat exchanger 5 is connected with an inlet of the compressor 1. The heat exchanger 5 adopts a double-pipe heat exchanger.
The secondary refrigerant water tank 13 comprises a refrigerant pipeline and a secondary refrigerant pipeline, the refrigerant pipeline inlet of the secondary refrigerant water tank 13 is connected with the outlet of the first throttler 10, the refrigerant pipeline outlet of the secondary refrigerant water tank 13 is connected with the inlet of the return flow refrigerant pipeline of the heat exchanger 5, the secondary refrigerant pipeline inlet of the secondary refrigerant water tank 13 is respectively connected with the outlet of the dehumidification evaporator 19 and the outlet of the fifth electromagnetic control valve 17, and the secondary refrigerant pipeline outlet of the secondary refrigerant water tank 13 is connected with the inlet of the pump 16.
The anti-frosting high-low temperature alternating damp-heat test box adopts a refrigerant which is a binary or more non-azeotropic mixed working medium, takes a multi-element mixed working medium as the refrigerant, and adopts a single compressor 1 to realize low-temperature refrigeration below-70 ℃ and realize the low temperature required by the high-low temperature test box. The secondary refrigerant water tank 13 can store refrigerating capacity and adjust the temperature of the secondary refrigerant entering the dehumidifying evaporator 19, the fifth electromagnetic control valve 17 and the sixth electromagnetic control valve 18 can adjust the flow rate of the secondary refrigerant entering the dehumidifying evaporator 19, and for the constant high humidity condition, the output of the humidifier can be effectively reduced by opening the fifth electromagnetic control valve 17 and closing the sixth electromagnetic valve 18 at regular time. The ball valve 15 can adjust the refrigerating capacity entering the secondary refrigerant water tank 13, and the refrigerating capacity entering the secondary refrigerant water tank 13 is adjusted by adjusting the opening degree of the ball valve 15, so that the temperature of the secondary refrigerant water tank 13 is 4-7 ℃, and the dehumidifying evaporator 19 is ensured to have good dehumidifying performance under the conditions of high temperature and low temperature and not frosted. The condenser 3 adopts an air-cooled condenser, the compressor 1 adopts a scroll compressor, and preferably, the compressor 1 adopts three scroll compressors. The first restrictor 10, the second restrictor 11 and the third restrictor 12 are manual throttles, automatic throttles or capillary tubes.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (5)
1. An anti-frosting high-low temperature alternating damp-heat test box is characterized by comprising a regenerative compressed air refrigeration cycle system and a secondary refrigerant dehumidification system, wherein the regenerative compressed air refrigeration cycle system comprises a compressor (1), an oil separator (2), a condenser (3), a first drying filter (4), a second drying filter (6) and a regenerative refrigeration unit, and the secondary refrigerant dehumidification system comprises a first electromagnetic control valve (7), a first throttler (10), a secondary refrigerant water tank (13), a fourth electromagnetic control valve (14), a ball valve (15), a fifth electromagnetic control valve (17), a sixth electromagnetic control valve (18), a dehumidification evaporator (19) and a pump (16);
the outlet of the compressor (1) is connected with the inlet of the oil separator (2), the outlet of the oil separator (2) is connected with the inlet of the condenser (3), the outlet of the condenser (3) is connected with the inlet of the first dry filter (4), the outlet of the first dry filter (4) is connected with the regenerative refrigeration unit and the second dry filter (6), the outlet of the second dry filter (6) is sequentially connected with the inlet of the first electromagnetic control valve (7) and the inlet of the first throttler (10), the outlet of the first throttler (10) is respectively connected with the inlet of the fourth electromagnetic control valve (14) and the secondary refrigerant water tank (13), the outlet of the fourth electromagnetic control valve (14) is connected with the inlet of the ball valve (15), the outlet of the ball valve (15) and the secondary refrigerant water tank (13) are connected with the regenerative refrigeration unit, the secondary refrigerant water tank (13) is connected with the inlet of the pump (16), and the outlet of the pump, An inlet of a sixth electromagnetic control valve (18), an outlet of a fifth electromagnetic control valve (17) is connected with the secondary refrigerant water tank (13), an outlet of the sixth electromagnetic control valve (18) is connected with an inlet of a dehumidification evaporator (19), and an outlet of the dehumidification evaporator (19) is connected with the secondary refrigerant water tank (13); an oil return port of the oil separator (2) is connected with an inlet of the compressor (1);
the regenerative refrigeration unit comprises a heat exchanger (5), a second electromagnetic control valve (8), a third electromagnetic control valve (9), a second restrictor (11), a third restrictor (12) and a refrigeration evaporator (20), wherein an outlet of a first drying filter (4) is connected with the heat exchanger (5), the heat exchanger (5) is connected with an inlet of a second drying filter (6), an outlet of the second drying filter (6) is respectively connected with an inlet of a first electromagnetic control valve (7), an inlet of the second electromagnetic control valve (8) and an inlet of the third electromagnetic control valve (9), an outlet of the second electromagnetic control valve (8) is connected with an inlet of the second restrictor (11), an outlet of the third electromagnetic control valve (9) is connected with an inlet of the third restrictor (12), an outlet of the second restrictor (11) and an outlet of the third restrictor (12) are connected with an inlet of the refrigeration evaporator (20), and an outlet of the refrigeration evaporator (20) is respectively connected with a secondary refrigerant water tank (13), An outlet of the ball valve (15) and a heat exchanger (5), wherein the heat exchanger (5) is connected with an inlet of the compressor (1);
the heat exchanger (5) comprises a forward flow refrigerant pipeline and a return flow refrigerant pipeline, an inlet of the forward flow refrigerant pipeline of the heat exchanger (5) is connected with an outlet of the first drying filter (4), an outlet of the forward flow refrigerant pipeline of the heat exchanger (5) is connected with an inlet of the second drying filter (6), inlets of the return flow refrigerant pipelines of the heat exchanger (5) are respectively connected with an outlet of the refrigeration evaporator (20), an outlet of the secondary refrigerant water tank (13) and an outlet of the ball valve (15), and an outlet of the return flow refrigerant pipeline of the heat exchanger (5) is connected with an inlet of the compressor (1);
the secondary refrigerant water tank (13) comprises a refrigerant pipeline and a secondary refrigerant pipeline, the refrigerant pipeline inlet of the secondary refrigerant water tank (13) is connected with the outlet of the first throttler (10), the refrigerant pipeline outlet of the secondary refrigerant water tank (13) is connected with the return refrigerant pipeline inlet of the heat exchanger (5), the secondary refrigerant pipeline inlet of the secondary refrigerant water tank (13) is respectively connected with the outlet of the dehumidification evaporator (19) and the outlet of the fifth electromagnetic control valve (17), and the secondary refrigerant pipeline outlet of the secondary refrigerant water tank (13) is connected with the inlet of the pump (16).
2. The anti-frosting high-low temperature alternating damp-heat test box according to claim 1, wherein a refrigerant adopted by the anti-frosting high-low temperature alternating damp-heat test box is a non-azeotropic mixed working medium with more than two elements.
3. The anti-frosting high-low temperature alternating damp-heat test box according to claim 1, wherein the coolant tank (13) can store refrigerating capacity and regulate the temperature of coolant entering the dehumidifying evaporator (19), and the fifth electromagnetic control valve (17) and the sixth electromagnetic control valve (18) can regulate the flow of coolant entering the dehumidifying evaporator (19).
4. The anti-frosting high-low temperature alternating humid heat test chamber as claimed in claim 1, wherein the ball valve (15) can adjust the cooling capacity entering the coolant water tank (13), and the cooling capacity entering the coolant water tank (13) is adjusted by adjusting the opening degree of the ball valve (15).
5. The anti-frosting high-low temperature alternating humid heat test box according to claim 1, wherein the first restrictor (10), the second restrictor (11) and the third restrictor (12) adopt manual throttling valves, automatic throttling valves or capillary tubes.
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