CN115342558A - Refrigerating system of test chamber and test chamber - Google Patents
Refrigerating system of test chamber and test chamber Download PDFInfo
- Publication number
- CN115342558A CN115342558A CN202210987492.2A CN202210987492A CN115342558A CN 115342558 A CN115342558 A CN 115342558A CN 202210987492 A CN202210987492 A CN 202210987492A CN 115342558 A CN115342558 A CN 115342558A
- Authority
- CN
- China
- Prior art keywords
- evaporator
- path
- refrigeration
- main
- compressor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 66
- 238000005057 refrigeration Methods 0.000 claims abstract description 108
- 238000007791 dehumidification Methods 0.000 claims abstract description 41
- 238000004378 air conditioning Methods 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 239000003507 refrigerant Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 10
- 238000001704 evaporation Methods 0.000 claims description 9
- 230000008020 evaporation Effects 0.000 claims description 9
- 238000001816 cooling Methods 0.000 description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000003921 oil Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 101150023613 mev-1 gene Proteins 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 239000010726 refrigerant oil Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 101150050883 ERV2 gene Proteins 0.000 description 1
- 102100039111 FAD-linked sulfhydryl oxidase ALR Human genes 0.000 description 1
- 101000959079 Homo sapiens FAD-linked sulfhydryl oxidase ALR Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/006—Accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The embodiment of the invention discloses a refrigerating system of a test box and the test box. The refrigeration system of the test chamber comprises: the system comprises a compressor, a condenser, a refrigeration main path and a refrigeration dehumidification main path; the outlet of the condenser is communicated with one end of the refrigeration main path and one end of the refrigeration dehumidification main path, and the other end of the refrigeration main path and the other end of the refrigeration dehumidification main path are both communicated with the inlet of the compressor; the refrigeration main path and the refrigeration dehumidification main path respectively comprise a throttling device and an evaporator; the evaporator of the main refrigerating path and the evaporator of the main refrigerating and dehumidifying path are located in the same air conditioning chamber of the test box, the evaporator of the main refrigerating path is used for refrigerating, and the evaporator of the main refrigerating and dehumidifying path is used for refrigerating and/or dehumidifying. The refrigerating system of the test box and the test box provided by the embodiment of the invention can reduce the use cost, and can stably and quickly cool and keep the temperature and the humidity constant.
Description
Technical Field
The embodiment of the invention relates to a refrigeration technology, in particular to a refrigeration system of a test box and the test box.
Background
For a plurality of devices, particularly loaded devices, the devices need to be tested through a damp and hot environment simulation test box, at the moment, a refrigerating system of the test box needs to work, the temperature and the humidity of the test box are guaranteed to meet requirements, and the requirements are provided for the test box, particularly the refrigerating system of the test box.
At present, the refrigerating system of the existing test box is generally a compressor with an evaporator capable of realizing refrigeration and dehumidification. However, for a test sample with a large load, the heat productivity is large, and the test sample is realized by configuring a high-power compressor and a large-area evaporator, and the high-power compressor and the large-area evaporator provide large cooling capacity, so that the system is incompatible when a large load is converted to a small load, or the small load is converted to the large load, and the temperature and the humidity fluctuate violently, even cannot be stabilized for a long time; in addition, in the operation process of the test box, a high-power compressor and a large-area evaporator provide large cooling energy, so that a high-power heater is required to provide heat energy for balance removal, and the use cost is high.
Disclosure of Invention
The embodiment of the invention provides a refrigerating system of a test box and the test box, which are used for reducing the use cost and can stably and quickly cool and keep the temperature constant.
In a first aspect, an embodiment of the present invention provides a refrigeration system for a test chamber, including: the system comprises a compressor, a condenser, a refrigeration main path and a refrigeration dehumidification main path; the outlet of the compressor is communicated with the inlet of the condenser, the outlet of the condenser is communicated with one end of the refrigeration main path and one end of the refrigeration dehumidification main path, and the other end of the refrigeration main path and the other end of the refrigeration dehumidification main path are both communicated with the inlet of the compressor; the refrigeration main path and the refrigeration dehumidification main path respectively comprise a throttling device and an evaporator; the evaporator of the main refrigerating path and the evaporator of the main refrigerating and dehumidifying path are located in the same air conditioning chamber of the test box, the evaporator of the main refrigerating path is used for refrigerating, and the evaporator of the main refrigerating and dehumidifying path is used for refrigerating and/or dehumidifying. Optionally, the evaporator includes a first evaporator and a second evaporator, and the throttling device includes a plurality of expansion valves;
the main refrigeration path is provided with two expansion valves which are connected in parallel, the two expansion valves which are connected in parallel are both communicated with the first evaporator, the two expansion valves which are connected in parallel are connected with two electromagnetic valves, one of the electromagnetic valves is positioned in a branch where one of the expansion valves is positioned, the other electromagnetic valve is connected with the two expansion valves which are connected in parallel in series, and the two expansion valves which are connected in parallel are arranged between the first evaporator and the two electromagnetic valves;
the main refrigeration and dehumidification circuit is provided with three parallel expansion valves which are all communicated with the second evaporator, the three parallel expansion valves are all connected with corresponding solenoid valves, and the three parallel expansion valves are arranged between the second evaporator and the corresponding solenoid valves.
Optionally, the main refrigeration and dehumidification circuit is further provided with an evaporation pressure regulating valve, the evaporation pressure regulating valve is arranged at an outlet of the second evaporator, and the evaporation pressure regulating valve is connected in parallel with at least one electromagnetic valve.
Optionally, the refrigeration system further includes a cold bypass and a hot bypass, the cold bypass is led out from a pipeline connecting the condenser and the evaporator, and is connected to the compressor; the hot bypass route is led out by a pipeline connected with the compressor and the condenser and is connected to the compressor.
Optionally, the cold bypass is provided with a plurality of solenoid valves and thermostatic expansion valves, the number of the cold bypasses is two, the two cold bypasses are connected in parallel, each cold bypass is provided with a solenoid valve and a thermostatic expansion valve, and the solenoid valves are close to a pipeline connecting the condenser and the evaporator than the thermostatic expansion valves.
Optionally, the hot bypass is provided with a plurality of electromagnetic valves and a hot gas bypass valve, the number of the hot bypass is two, the two hot bypasses are connected in parallel, each hot bypass is provided with an electromagnetic valve and a hot gas bypass valve, and the electromagnetic valves are close to a pipeline connecting the condenser and the compressor than the hot gas bypass valves.
Optionally, the refrigeration system further includes a controller, and a temperature sensor and/or a humidity sensor, where the temperature sensor, the humidity sensor, the compressor and the solenoid valve are electrically connected to the controller, and the controller is configured to control a working state of the compressor and on/off of the solenoid valve according to information collected by the temperature sensor and/or the humidity sensor.
Optionally, the refrigeration system further comprises a liquid storage tank, and the liquid storage tank is arranged on a passage between the condenser and the throttling device.
Optionally, the refrigeration system further comprises an oil separator disposed in the passage between the compressor and the condenser.
In a second aspect, embodiments of the present invention provide a test chamber comprising a refrigeration system as described in the first aspect.
The embodiment of the invention provides a refrigerating system of a test chamber and the test chamber, which comprise: the system comprises a compressor, a condenser, a refrigeration main path and a refrigeration dehumidification main path; the outlet of the compressor is communicated with the inlet of the condenser, the outlet of the condenser is communicated with one end of the refrigeration main path and one end of the refrigeration dehumidification main path, and the other end of the refrigeration main path and the other end of the refrigeration dehumidification main path are both communicated with the inlet of the compressor; the refrigeration main path and the refrigeration dehumidification main path respectively comprise a throttling device and an evaporator; the evaporator of the main refrigerating path and the evaporator of the main refrigerating and dehumidifying path are located in the same air conditioning chamber of the test box, the evaporator of the main refrigerating path is used for refrigerating, and the evaporator of the main refrigerating and dehumidifying path is used for refrigerating and/or dehumidifying. According to the refrigerating system of the test box and the test box provided by the embodiment of the invention, under the condition of a damp-heat test (the humidity test is generally at a temperature above zero degree centigrade) or a small load, the evaporator for refrigerating and dehumidifying can meet the temperature and humidity requirements. Under rapid cooling or constant temperature and heavy load condition, the evaporator for refrigeration and dehumidification and the evaporator for refrigeration work simultaneously, can carry out rapid cooling and keep the constancy of temperature steadily.
Drawings
Fig. 1 is a schematic structural diagram of a refrigeration system of a test chamber according to an embodiment of the invention;
fig. 2 is a block diagram of a part of the structure of a refrigeration system of a test chamber according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a refrigeration system of a test chamber according to an embodiment of the present invention. Referring to fig. 1, the refrigeration system of the test chamber includes: a compressor 10, a condenser 20, a refrigeration main path L1, and a refrigeration dehumidification main path L2.
Wherein, the outlet of one compressor 10 is communicated with the inlet of one condenser 20, the outlet of the condenser 20 is communicated with one end of the main refrigeration path L1 and one end of the main refrigeration dehumidification path L2, and the other end of the main refrigeration path L1 and the other end of the main refrigeration dehumidification path L2 are both communicated with the inlet of the compressor 10. The main refrigeration path L1 and the main refrigeration and dehumidification path L2 each include a throttling device 30 and an evaporator 40; the evaporator 40 of the main refrigeration path L1 and the evaporator 40 of the main refrigeration dehumidification path are located in the same air-conditioning room of the test chamber, the evaporator 40 of the main refrigeration path L1 is used for refrigeration, and the evaporator 40 of the main refrigeration dehumidification path L2 is used for refrigeration and/or dehumidification.
It should be noted that, when the spatial positions of the evaporators are arranged in practical application, when the evaporator 40 of the main cooling and dehumidifying path L2 and the evaporator 40 of the main cooling and dehumidifying path L1 are arranged on top of each other, the evaporator 40 of the main cooling and dehumidifying path L2 is arranged below the evaporator 40 of the main cooling path L1, so that the collection of the water dehumidified in the evaporator 40 of the main cooling and dehumidifying path L2 is facilitated.
Illustratively, the test chamber includes an air conditioning chamber, a test chamber, a refrigeration unit chamber, and a control chamber, and the test chamber may be a hot and humid environment simulation test chamber. The evaporator 40 is arranged in an air conditioning chamber, the compressor 10 and the condenser 20 are arranged in a refrigerating unit chamber, the laboratory is a test space provided for test samples according to environmental requirements such as temperature and humidity, and the air conditioning chamber can exchange temperature and humidity with the laboratory through a circulating fan. The condenser 20 may be water-cooled and is less affected by the ambient temperature. The evaporator 40 may adopt a double-inlet and double-outlet pipeline design, and a uniform liquid-separating pipeline is arranged at the inlet end, so as to improve the uniformity of the temperature of the test chamber. The cold bypass 50 can reduce the superheat of the return air of the compressor 10, and has the advantage of ensuring that the exhaust temperature of the compressor 10 is not too high, thereby causing the compressor to alarm and even stop. The hot bypass passage 60 can ensure that the compression ratio of the compressor 10 is within a preset range, and has the advantages of improving the return air pressure, preventing the return air pressure from being a negative value condition and preventing the compressor from liquid impact and damage to the compressor 10. The at least two evaporators 40 may be at least one evaporator for cooling and dehumidifying. Under the damp-heat test (the temperature is generally above zero degree centigrade in the humidity test) or the small load condition, the evaporator for refrigeration and dehumidification can meet the temperature and humidity requirements, and compared with the prior art in which a high-power compressor and a large-area evaporator are arranged, the use cost can be reduced because the heat energy provided by the high-power compressor and the large-area evaporator is prevented from being balanced by the heat energy provided by the high-power heater. Under rapid cooling or constant temperature and large load conditions, the evaporator for refrigeration and dehumidification and the evaporator for refrigeration operate simultaneously, rapid cooling and temperature constancy can be stably performed.
The refrigerating system of the test box provided by the embodiment comprises a compressor, a condenser, a refrigerating main path and a refrigerating and dehumidifying main path; the outlet of the condenser is communicated with one end of the refrigeration main path and one end of the refrigeration dehumidification main path, and the other end of the refrigeration main path and the other end of the refrigeration dehumidification main path are both communicated with the inlet of the compressor; the refrigeration main path and the refrigeration dehumidification main path respectively comprise a throttling device and an evaporator; the evaporator of the main refrigerating path and the evaporator of the main refrigerating and dehumidifying path are located in the same air conditioning chamber of the test box, the evaporator of the main refrigerating path is used for refrigerating, and the evaporator of the main refrigerating and dehumidifying path is used for refrigerating and/or dehumidifying. The refrigerating system of proof box that this embodiment provided, under damp and hot test (humidity test general temperature is above the zero degree of centigrade) or the little load condition, the evaporimeter work for refrigeration and dehumidification can satisfy the humiture demand, dispose powerful compressor and the evaporimeter of large tracts of land among the prior art relatively, owing to avoided providing the cold energy that heat energy debalanced powerful compressor and the evaporimeter of large tracts of land provided with powerful heater, but reduction in use cost. Under rapid cooling or constant temperature and large load conditions, the evaporator for refrigeration and dehumidification and the evaporator for refrigeration operate simultaneously, rapid cooling and temperature constancy can be stably performed.
Referring to fig. 1, alternatively, the evaporator 40 includes a first evaporator 41 and a second evaporator 42, and the throttling device 30 includes a plurality of expansion valves; the main refrigeration path L1 is provided with two parallel expansion valves, both of which are communicated with the first evaporator 41, and the two parallel expansion valves are connected with two solenoid valves, one of which is located in a branch where one of the expansion valves is located, and the other of which is connected in series with the two parallel expansion valves, and the two parallel expansion valves are disposed between the first evaporator and the two solenoid valves; the main cooling and dehumidifying path L2 is provided with three parallel expansion valves, the three parallel expansion valves are all communicated with the second evaporator 42, the three parallel expansion valves are all connected with corresponding solenoid valves, and the three parallel expansion valves are arranged between the second evaporator 42 and the corresponding solenoid valves.
Illustratively, two passages of the first evaporator 41 communicating with the condenser 20 are provided with a first expansion valve MEV1 and a second expansion valve MEV2, respectively, and three passages of the second evaporator 42 communicating with the condenser 20 are provided with a third expansion valve MEV3, a fourth expansion valve MEV4, and a fifth expansion valve MEV5, each of which is close to the corresponding evaporator 40. A branch where the first expansion valve MEV1 is located is provided with a sixth solenoid valve SV6, the first expansion valve MEV1 and the second expansion valve MEV2 are connected in parallel and then connected in series with the solenoid valve HSV, and the specific positional relationship is shown in fig. 1. The electromagnetic valve HSV is a quick-opening electromagnetic valve, and can control different low-temperature refrigeration more accurately. The first evaporator 41 and the second evaporator 42 are placed in parallel in the same air-conditioned room, the first evaporator 41 is used for cooling, and the second evaporator 42 is used for cooling and dehumidifying. Under the damp and hot test (the humidity test is generally at a temperature above zero ℃) or under the condition of small load, the second evaporator 42 can meet the temperature and humidity requirements when working, compared with the prior art in which a high-power compressor and a large-area evaporator are arranged, the cold output quantity is low, only one evaporator is started, and the use cost is low. In the case of rapid cooling or constant temperature and large load, the first evaporator 41 and the second evaporator 42 are simultaneously operated, rapid cooling and temperature keeping can be stably performed.
With continued reference to fig. 1, optionally, the refrigeration system further includes a plurality of solenoid valves, the second evaporator 42 is communicated with the compressor 10 through two passages, and each passage of the second evaporator 42 communicated with the compressor 10 is provided with a solenoid valve, and the solenoid valves are close to the second evaporator 42.
Illustratively, two passages of the second evaporator 42 communicating with the compressor 10 are provided with a first solenoid valve SV1 and a second solenoid valve SV2, respectively. The on-off of the electromagnetic valve can realize the on-off control of the passage where the electromagnetic valve is located. The first solenoid valve SV1 and the second solenoid valve SV2 are respectively arranged in two parallel passages, and the on-off of the passage where the first solenoid valve SV1 and the second solenoid valve SV2 are arranged can be respectively controlled.
In addition, three passages through which the second evaporator 42 communicates with the condenser 20 are provided with a third solenoid valve SV3, a fourth solenoid valve SV4, and a fifth solenoid valve SV5. The opening degree of the expansion valve can adjust the flow of the corresponding evaporator, thereby further adjusting the temperature and humidity of the evaporator after refrigeration and/or dehumidification.
Optionally, the main refrigeration and dehumidification circuit is further provided with an evaporation pressure regulating valve KVP, the evaporation pressure regulating valve KVP is disposed at an outlet of the second evaporator 42, and the evaporation pressure regulating valve KVP is connected in parallel with at least one electromagnetic valve.
Specifically, referring to fig. 1, the evaporation pressure regulating valve KVP is connected in parallel with two passages provided with a first solenoid valve SV1 and a second solenoid valve SV2. The evaporation pressure regulating valve KVP can maintain the refrigerant in the evaporator to evaporate at a relatively high pressure/temperature when the humidity in the room where the evaporator is located is high or the evaporator is continuously contacted with the external environment, so as to prevent the surface of the evaporator from being frozen and prevent ventilation and heat exchange; while maintaining a desired humidity environment.
Optionally, the refrigeration system further includes a cold bypass 50 and a hot bypass 60, the cold bypass 50 is led out from a pipe connecting the condenser 20 and the evaporator 40, and is connected to the compressor 10; the hot bypass line 60 is led out from a pipe connecting the compressor 10 and the condenser 20, and is connected to the compressor 10.
Specifically, as shown in fig. 1, the cold bypass path 50 is led out from a pipe connecting the condenser 20 and the evaporator 40, is connected to the compressor 10, and is used for cooling the refrigerant at the inlet of the compressor 10, thereby achieving the effect of reducing the return air temperature. The hot bypass line 60 is led out from a pipe connecting the compressor 10 and the condenser 20, is connected to the compressor 10, and serves to bypass excess energy generated in the system and raise the return air pressure.
With continued reference to fig. 1, optionally, the refrigeration system further includes a plurality of solenoid valves and thermostatic expansion valves, two cold bypass paths 50 are provided, two cold bypass paths 50 are connected in parallel, each cold bypass path 50 is provided with a solenoid valve and a thermostatic expansion valve, and the solenoid valve is close to a pipeline connecting the condenser 20 and the evaporator 40 than the thermostatic expansion valve.
Illustratively, the cold bypass passage 50 includes a first cold bypass passage 51 and a second cold bypass passage 52, and the first cold bypass passage 51 and the second cold bypass passage 52 are connected in parallel. The first cold bypass passage 51 is provided with a solenoid valve SV7 and a thermostatic expansion valve EV1, and the second cold bypass passage 52 is provided with a solenoid valve SV8 and a thermostatic expansion valve EV2. Under the condition of heavy load, the solenoid valve and the thermostatic expansion valve in one passage of the first cold bypass passage 51 and the second cold bypass passage 52 are opened, or the solenoid valves and the thermostatic expansion valves in the first cold bypass passage 51 and the second cold bypass passage 52 are all disconnected, so that the constant temperature reduction rate and temperature can be ensured, when the load is low and a humidity test is carried out, the solenoid valves and the thermostatic expansion valves in the first cold bypass passage 51 and the second cold bypass passage 52 are opened or partially opened, and redundant cold energy can bypass and flow back to the compressor through the first cold bypass passage 51 and/or the second cold bypass passage 52, so that the stability of the whole system is maintained. In addition, temperature sensors TT1 and TT2 and two temperature sensing bulbs are arranged on two sides of the compressor 10; the temperature sensor TT1 and the pressure sensor LTP are matched for use, so that liquid impact of the compressor 10 is prevented, and an alarm is given in advance; the temperature sensor TT2 is used for measuring the discharge temperature of the compressor 10, and when the discharge temperature exceeds a predetermined value, the controller 70 controls the cold bypass path to lower the return air temperature of the compressor 10, thereby lowering the discharge temperature; the two temperature sensing bulbs are respectively connected with thermal expansion valves EV1 and EV2, and the thermal expansion valves EV1 and EV2 adjust the opening degree thereof according to the superheat degree in a return air passage connected with the compressor 10.
With continued reference to fig. 1, optionally, the hot bypass path 60 is provided with a plurality of solenoid valves and hot gas bypass valves, two hot bypass paths 60 are provided, two hot bypass paths 60 are connected in parallel, each hot bypass path 60 is provided with a solenoid valve and a hot gas bypass valve, and the solenoid valves are close to the pipeline connecting the condenser 20 and the compressor 10 than the hot gas bypass valves.
Illustratively, the hot bypass passage 60 includes a first hot bypass passage 61 and a second hot bypass passage 62, and the first hot bypass passage 61 and the second hot bypass passage 62 are connected in parallel. The first hot bypass passage 61 is provided with a solenoid valve SV9 and a hot gas bypass valve ERV1, and the second hot bypass passage 62 is provided with a solenoid valve SV10 and a hot gas bypass valve ERV2. Under the condition of heavy load, the solenoid valve and the hot gas bypass valve in one of the first hot bypass path 61 and the second hot bypass path 62 are opened, or the solenoid valves and the hot gas bypass valves in the first hot bypass path 61 and the second hot bypass path 62 are all opened, so that the constant temperature and temperature can be ensured, when the load is low and the humidity test is carried out, the solenoid valves and the hot gas bypass valves in the first hot bypass path 61 and the second hot bypass path 62 are both opened, and redundant heat energy can bypass through the first hot bypass path 61 and the second hot bypass path 62 and flow back to the compressor 10, so that the stability of the whole refrigeration system is maintained.
Optionally, the refrigeration system further comprises a reservoir RL disposed in the path between the condenser 20 and the throttling device 30.
Specifically, referring to fig. 1, when the operation condition of the refrigeration system changes, the flow rate of the refrigerant in the system changes greatly, and the purpose of providing the liquid storage tank RL is to adapt to the situation that the flow rate of the refrigerant increases or decreases suddenly. When the flow demand is reduced, redundant refrigerants can be stored in the liquid storage tank RL, and large impact on the system cannot be generated; when the flow demand is increased, the refrigerant in the liquid storage tank RL can be put into circulation, so that the problem of short-term insufficient flow is avoided.
Optionally, the refrigeration system further comprises an oil separator OS arranged in the passage between the compressor 10 and the condenser 20.
Specifically, referring to fig. 1, shock absorbing hoses STO and STI may be respectively disposed at the outlet end and the inlet end of the compressor to reduce the impact of vibration of the compressor 10 on the system piping. The passage between the compressor 10 and the condenser 20 is provided with an oil separator OS and an oil return pipe to separate the refrigerant oil contained in the exhaust gas so that the refrigerant oil is returned to the compressor 10 again.
In addition, referring to fig. 1, a check valve NV (the purpose of the check valve NV is to avoid oil return), a pressure sensor LTP, a radiator fan FM, a water pressure regulating valve WFC, a filling port TV, pressure gauges G1 and G2, a dry filter D, and a sight glass SGN are further provided in the passage of the refrigeration system. The specific location of the low pressure sensor LTP is shown in fig. 1. The radiator fan FM is disposed at the position of the compressor 10, the water pressure regulating valve WFC is disposed in the water cooling pipeline of the condenser 20, and by detecting the condensing pressure at the outlet of the condenser, when the condensing pressure is too high, the flow rate of the cooling medium (water) can be increased by increasing the opening degree of the water pressure regulating valve WFC, and when the condensing pressure is too low, the flow rate of the cooling medium (water) can be decreased, thereby limiting the condensing pressure of the system within a relatively safe range. The passage where the water pressure regulating valve WFC is located is provided with cleaning plugs A1 and A2, and temperature pressure gauges G3 and G4, ball valves B1 and B2, and a filter C which are arranged outdoors in the passage. The filling port TV is used for filling or adjusting the amount of refrigerant in the system, and the pressure gauges G1 and G2 monitor the running condition of the refrigerating system. The dry filter D and the liquid sight glass SGN are disposed between the condenser 20 and the evaporator 40, the dry filter D may filter impurities in the system, and the liquid sight glass SGN may display a state of a refrigerant.
Optionally, the refrigeration system further includes a controller 70, a temperature sensor 80 and/or a humidity sensor 90, the temperature sensor 80, the humidity sensor 90, the compressor 10 and the solenoid valve are all electrically connected to the controller 70, and the controller 70 is configured to control a working state of the compressor 10 and on/off of the solenoid valve according to information collected by the temperature sensor and/or the humidity sensor.
Fig. 2 is a block diagram illustrating a part of the structure of a refrigeration system of a test chamber according to an exemplary embodiment of the present invention. Referring to fig. 1 and 2, the controller 70 may be provided in a control room of the test chamber, and the temperature sensor 80 and the humidity sensor 90 may be provided in a test room of the test chamber. The controller 70 may control the operating state of the compressor 10, such as controlling the operation of the compressor 10, according to the temperature collected by the temperature sensor 80 and/or the humidity collected by the humidity sensor 90, and control the on/off of the solenoid valve, such as controlling the conduction of the solenoid valve, according to the measurement result of the temperature sensors TT1, TT 2.
The refrigerating system of proof box that this embodiment provided, under damp and hot test (humidity test general temperature is above the zero degree of centigrade) or the little load condition, the evaporimeter work for refrigeration and dehumidification can satisfy the humiture demand, dispose powerful compressor and the evaporimeter of large tracts of land among the prior art relatively, owing to avoided providing the cold energy that heat energy debalanced powerful compressor and the evaporimeter of large tracts of land provided with powerful heater, but reduction in use cost. Under rapid cooling or constant temperature and heavy load condition, the evaporator for refrigeration and dehumidification and the evaporator for refrigeration work simultaneously, can carry out rapid cooling and keep the constancy of temperature steadily.
The embodiment of the invention also provides a test box which comprises the refrigeration system according to any embodiment of the invention, so that the test box has corresponding beneficial effects of the refrigeration system.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A test chamber refrigeration system, comprising: the system comprises a compressor, a condenser, a refrigeration main path and a refrigeration dehumidification main path;
an outlet of the compressor is communicated with an inlet of the condenser, an outlet of the condenser is communicated with one end of the main refrigerating path and one end of the main refrigerating and dehumidifying path, and the other end of the main refrigerating path and the other end of the main refrigerating and dehumidifying path are communicated with an inlet of the compressor;
wherein the main refrigeration path and the main refrigeration and dehumidification path each comprise a throttling device and an evaporator;
the evaporator of the main refrigeration path and the evaporator of the main refrigeration and dehumidification path are located in the same air conditioning chamber of the test box, the evaporator of the main refrigeration path is used for refrigeration, and the evaporator of the main refrigeration and dehumidification path is used for refrigeration and/or dehumidification.
2. The refrigerant system as set forth in claim 1, wherein said evaporator includes a first evaporator and a second evaporator, and said throttling means includes a plurality of expansion valves;
the main refrigeration path is provided with two expansion valves connected in parallel, the two expansion valves connected in parallel are both communicated with the first evaporator, the two expansion valves connected in parallel are connected with two solenoid valves, one of the solenoid valves is positioned in a branch where one of the expansion valves is positioned, the other solenoid valve is connected in series with the two expansion valves connected in parallel, and the two expansion valves connected in parallel are arranged between the first evaporator and the two solenoid valves;
the main refrigeration and dehumidification path is provided with three expansion valves connected in parallel, the three expansion valves connected in parallel are all communicated with the second evaporator, the three expansion valves connected in parallel are all connected with corresponding solenoid valves, and the three expansion valves connected in parallel are arranged between the second evaporator and the corresponding solenoid valves.
3. The refrigeration system according to claim 2, wherein the main refrigeration and dehumidification circuit is further provided with an evaporation pressure regulating valve, which is arranged at the outlet of the second evaporator, and which is connected in parallel with at least one solenoid valve.
4. The refrigerant system as set forth in claim 1, further including a cold bypass path and a hot bypass path, said cold bypass path leading from a conduit connecting said condenser and said evaporator to said compressor; the hot bypass route is led out by a pipeline connected with the compressor and the condenser and is connected to the compressor.
5. The refrigerating system as recited in claim 4 wherein said cold bypass is provided with a plurality of solenoid valves and thermostatic expansion valves, two cold bypass are provided, two cold bypass are connected in parallel, each of said cold bypass is provided with said solenoid valve and thermostatic expansion valve, and said solenoid valves are closer to a pipe connecting said condenser and said evaporator than said thermostatic expansion valve.
6. The refrigeration system as claimed in claim 4, wherein the hot bypass path is provided with a plurality of solenoid valves and a hot gas bypass valve, the number of the hot bypass paths is two, two of the hot bypass paths are connected in parallel, each of the hot bypass paths is provided with the solenoid valve and the hot gas bypass valve, and the solenoid valve is closer to a pipeline connecting the condenser and the compressor than the hot gas bypass valve.
7. The refrigeration system according to claim 2, 5 or 6, further comprising a controller, a temperature sensor and/or a humidity sensor, wherein the temperature sensor, the humidity sensor, the compressor and the solenoid valve are electrically connected to the controller, and the controller is configured to control the operating state of the compressor and the on/off of the solenoid valve according to information collected by the temperature sensor and/or the humidity sensor.
8. The refrigerant system as set forth in claim 1, further including a liquid reservoir disposed in the passage between said condenser and said throttling device.
9. The refrigeration system of claim 1, further comprising an oil separator disposed on the passage between the compressor and the condenser.
10. A test chamber comprising a refrigeration system as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210987492.2A CN115342558A (en) | 2022-08-17 | 2022-08-17 | Refrigerating system of test chamber and test chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210987492.2A CN115342558A (en) | 2022-08-17 | 2022-08-17 | Refrigerating system of test chamber and test chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115342558A true CN115342558A (en) | 2022-11-15 |
Family
ID=83951464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210987492.2A Pending CN115342558A (en) | 2022-08-17 | 2022-08-17 | Refrigerating system of test chamber and test chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115342558A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116795158A (en) * | 2023-03-20 | 2023-09-22 | 江苏拓米洛高端装备股份有限公司 | Environment box and temperature and humidity adjusting method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000034075A (en) * | 1998-11-27 | 2000-06-15 | 김진억 | Constant temperature and constant humidity apparatus |
| CN101799695A (en) * | 2010-02-08 | 2010-08-11 | 重庆哈丁科技有限公司 | Adsorption and dehumidification control system of cold well of high-low temperature test chamber |
| CN209295475U (en) * | 2018-09-29 | 2019-08-23 | 苏州贝茵医疗器械有限公司 | It can be improved the throttling and evaporation structure of cooling effect and the refrigeration system using it |
| CN209342547U (en) * | 2018-11-28 | 2019-09-03 | 无锡帕捷科技有限公司 | A kind of high/low temperature cyclic damp heat test device |
| CN114152886A (en) * | 2021-09-15 | 2022-03-08 | 江苏拓米洛环境试验设备有限公司 | Power battery test equipment and defrosting method |
| CN114440504A (en) * | 2022-02-14 | 2022-05-06 | 江苏拓米洛环境试验设备有限公司 | Refrigerating system |
| CN114484911A (en) * | 2022-02-24 | 2022-05-13 | 江苏拓米洛环境试验设备有限公司 | Refrigerating system and double-layer one-to-two high-low temperature test box comprising same |
-
2022
- 2022-08-17 CN CN202210987492.2A patent/CN115342558A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000034075A (en) * | 1998-11-27 | 2000-06-15 | 김진억 | Constant temperature and constant humidity apparatus |
| CN101799695A (en) * | 2010-02-08 | 2010-08-11 | 重庆哈丁科技有限公司 | Adsorption and dehumidification control system of cold well of high-low temperature test chamber |
| CN209295475U (en) * | 2018-09-29 | 2019-08-23 | 苏州贝茵医疗器械有限公司 | It can be improved the throttling and evaporation structure of cooling effect and the refrigeration system using it |
| CN209342547U (en) * | 2018-11-28 | 2019-09-03 | 无锡帕捷科技有限公司 | A kind of high/low temperature cyclic damp heat test device |
| CN114152886A (en) * | 2021-09-15 | 2022-03-08 | 江苏拓米洛环境试验设备有限公司 | Power battery test equipment and defrosting method |
| CN114440504A (en) * | 2022-02-14 | 2022-05-06 | 江苏拓米洛环境试验设备有限公司 | Refrigerating system |
| CN114484911A (en) * | 2022-02-24 | 2022-05-13 | 江苏拓米洛环境试验设备有限公司 | Refrigerating system and double-layer one-to-two high-low temperature test box comprising same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116795158A (en) * | 2023-03-20 | 2023-09-22 | 江苏拓米洛高端装备股份有限公司 | Environment box and temperature and humidity adjusting method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10760807B2 (en) | Air conditioner and control method therefor | |
| US10739045B2 (en) | Systems and methods for controlling a refrigeration system | |
| JP6105831B2 (en) | Method and apparatus for equalizing pumping refrigerant system | |
| JP2008185229A (en) | Refrigerating device | |
| CN110319541B (en) | Unloading adjustment control method of large-displacement variable-frequency multi-split system | |
| CN113339946A (en) | Air conditioner operation control method and device, air conditioner and computer storage medium | |
| CN115342558A (en) | Refrigerating system of test chamber and test chamber | |
| JP5283587B2 (en) | Air conditioner | |
| JP2017146285A (en) | Environmental test device | |
| JP2007232265A (en) | Refrigeration unit | |
| CN114377740B (en) | Temperature coupling control system of equipment operating at low temperature for long time | |
| WO2018034275A1 (en) | Refrigeration cycle device | |
| KR20130090133A (en) | Air conditoner | |
| JP6404539B2 (en) | Air conditioner | |
| WO2008114952A1 (en) | Multi-unit air conditioning system and controlling method for the same | |
| JP2009115336A (en) | Refrigeration system | |
| CN214200673U (en) | Enthalpy difference testing device | |
| CN214200671U (en) | Enthalpy difference testing device | |
| CN220062191U (en) | Constant temperature system | |
| CN218884342U (en) | Refrigerating system and cold chain equipment | |
| JPWO2019163042A1 (en) | Air conditioner and air handling unit | |
| CN113701374B (en) | Refrigeration equipment, refrigeration system and control method thereof | |
| CN214200675U (en) | Enthalpy difference testing device | |
| CN109999926B (en) | Anti-frosting high-low temperature alternating damp-heat test box | |
| CN221035981U (en) | Multi-split air conditioning system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 215300 plants A6, a7, a8 and B10, No. 8, Huacheng Road, Lujia Town, Kunshan City, Suzhou City, Jiangsu Province Applicant after: Jiangsu Tuomiluo High-end Equipment Co.,Ltd. Address before: 215300 plants A6, a7, a8 and B10, No. 8, Huacheng Road, Lujia Town, Kunshan City, Suzhou City, Jiangsu Province Applicant before: JIANGSU TOLIMO ENVIRONMENT TESTING EQUIPMENT Co.,Ltd. |
|
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20221115 |