CN211436251U

CN211436251U - Energy-saving temperature control system of high-low temperature alternating damp-heat test chamber

Info

Publication number: CN211436251U
Application number: CN201922194231.1U
Authority: CN
Inventors: 章建军
Original assignee: Shenzhen Tops Electronic Co ltd
Current assignee: Shenzhen Tops Electronic Co ltd; Top Effort Ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-09-08
Anticipated expiration: 2029-12-09

Abstract

The utility model discloses an energy-conserving temperature control system of high low temperature reversal damp heat test case, relate to the refrigeration technology field, its technical scheme main points are including the box, set up the evaporimeter in the box, set up heat exchanger and A group's compressor outside the box, and supply the A group's return circuit that the A condensing agent flows, A group's return circuit includes the circulation main road, and all connect in the cooling branch road and the first return branch road at circulation main road both ends, evaporimeter and A group's compressor set up on the circulation main road along A condensing agent flow direction, be equipped with first return valve on the first return branch road; the heat medium flowing section of the heat exchanger is arranged on the cooling branch, and the cooling branch is provided with a cooling valve group at the heat medium output end of the heat exchanger. The technical effect is that through opening and closing corresponding valves, uncooled condensing agent and cooled condensing agent are mixed with each other to achieve the temperature control effect, and the condensed condensing agent is not required to be heated additionally, so that the energy-saving and environment-friendly effects are achieved.

Description

Energy-saving temperature control system of high-low temperature alternating damp-heat test chamber

Technical Field

The utility model relates to a refrigeration technology field, in particular to energy-conserving temperature control system of high low temperature reversal damp-heat test case.

Background

The high-low temperature alternating damp-heat test box is an important means for testing and verifying various electrical properties and physical properties of materials in high-low temperature or damp-heat alternating environments of aviation space products, information electronic instruments, materials, electricians, vehicles, metals, electronic products and various electronic components; it can perform multiple climate environment tests such as high-temperature storage, low-temperature storage, high-temperature high-humidity, humidity and heat alternation, etc.

At present, high low temperature alternation damp and hot proof box adjusts inside temperature through temperature control system, and temperature control system is including setting up in the inside evaporimeter of high low temperature alternation damp and hot proof box, set up in the outside heat exchanger of high low temperature alternation damp and hot proof box, establish ties evaporimeter and heat exchanger and be the multiple pipeline of pipeline return circuit and set up the compressor on the pipeline, is provided with a plurality of heater strips between the input of heat medium output and evaporimeter of heat exchanger. The heat exchanger cools the passing condensing agent, then the heating wire heats the passing condensing agent, and the temperature of the condensing agent entering the evaporator is changed by adjusting the heating power.

Although the temperature of the high-low temperature alternating wet heat test box can be adjusted in the mode, the cooled condensing agent needs to be heated by a heater, and the method of firstly cooling and then controlling the temperature consumes a large amount of energy.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an energy-conserving temperature control system of high low temperature alternation damp heat test case, it passes through the corresponding valve of switch, makes the condensing agent after uncooled condensing agent and the cooling intermix reach accuse temperature effect, need not additionally to heat the condensing agent after the condensation, more energy-concerving and environment-protective.

The above technical purpose of the present invention can be achieved by the following technical solutions:

an energy-saving temperature control system of a high-low temperature alternating damp-heat test box comprises a box body, an evaporator arranged in the box body, a heat exchanger and an A group of compressors arranged outside the box body, and an A group of loops for A condensing agent to flow, wherein the A group of loops comprise a circulation main loop, a cooling branch and a first return branch, the cooling branch and the first return branch are connected to two ends of the circulation main loop respectively, the evaporator and the A group of compressors are arranged on the circulation main loop along the flowing direction of the A condensing agent, and a first return valve is arranged on the first return branch; the heat medium flowing section of the heat exchanger is arranged on a cooling branch, a cooling valve bank is arranged on the cooling branch at the heat medium output end of the heat exchanger, and the first return valve and the cooling valve bank are opened and closed alternately to control the A condensing agent with higher temperature and the A condensing agent with lower temperature to enter the evaporator and be mixed.

By adopting the technical scheme, the A group loop is used for flowing the A condensing agent, the A condensing agent with lower temperature enters the evaporator to be evaporated and absorbs the temperature in the box body, and the heated A condensing agent flows out of the evaporator to enter the A group compressor so as to be compressed to high temperature and high pressure. When the first reflux valve is opened, the high-temperature and high-pressure A condensing agent enters the first reflux branch from the circulation main circuit and enters the evaporator; when the cooling valve group is opened, the A condensing agent with high temperature and high pressure enters a heat medium flowing section of the heat exchanger, and a cooling medium flowing section in the heat exchanger absorbs the temperature of the heat medium flowing section so as to cool the A condensing agent in the heat medium flowing section. The first reflux valve and the cooling valve group are opened and closed alternately, so that the A condensing agent with the cooler cooling branch and the A condensing agent with the higher temperature of the first reflux branch are mixed in the evaporator to reach the required temperature. When the temperature in the box body needs to be changed, the opening time length of the first reflux valve and the cooling valve group only needs to be correspondingly adjusted.

The temperature control effect is achieved by mixing the uncooled condensing agent and the cooled condensing agent, and compared with the prior art, the condensing agent is not required to be additionally heated, so that the energy-saving and environment-friendly effects are achieved.

Further setting: the A group of circuits further comprises a second backflow branch circuit, the second backflow branch circuit is connected to the output end of the evaporator and one end, far away from the evaporator, of the first backflow valve respectively, and a second backflow valve is arranged on the second backflow branch circuit.

By adopting the technical scheme, the condensing agent A flowing out of the outlet of the evaporator has higher temperature and is mixed with the condensing agent A flowing out of the compressor in the group A at high temperature and high pressure to obtain condensing agent flow A with proper pressure, and the condensing agent flow A is mixed with the condensing agent flow with lower temperature in the cooling branch to obtain condensing agent flow with proper temperature. The first return branch and the second return branch are matched with each other, only part of the condensing agent A is compressed, and the pressure is reduced after the whole part of the condensing agent A is not compressed, so that the energy consumption is reduced.

Further setting: the cooling is equipped with first cooling branch road and second cooling branch road on the branch road, the valve unit of cooling is including locating the first cooling valve on first cooling branch road respectively and locating the second cooling valve on the second cooling branch road, the both ends of first cooling branch road and second cooling branch road are equallyd divide and are connect respectively in heat medium output and the input of evaporimeter of heat exchanger, still be equipped with first heater on the first cooling branch road, still be equipped with the second heater that power is higher than first heater on the second cooling branch road.

By adopting the technical scheme, when the condensing agents A in the cooling branch and the reflux branch are mixed, the density, the flow rate and the temperature of the condensing agents in different states have great difference, and the temperature of the mixed condensing agents is difficult to accurately reach the required temperature. Therefore, a heater and a cooling valve are respectively arranged on the first cooling branch and the second cooling branch, the heater is close to the input evaporator, and the refrigerant flow at the tail end of the cooling branch can be heated to rapidly change the temperature. Because the power of the first heater is different from that of the second heater, the first cooling valve and the second cooling valve are alternately opened, so that the temperature of the A condensing agent flowing through the cooling branch is finely adjusted, and the overall temperature control is more accurate.

Further setting: and the cooling branch is provided with a group A water cooler connected with a heating medium input end of the heat exchanger, and the input end of the group A water cooler is connected with the circulation trunk.

Through adopting above-mentioned technical scheme, A water cooler carries out the primary cooling to the A condensing agent that the circulation trunk flowed into the cooling branch road, and the A condensing agent after will the primary cooling penetrates heat medium flow section of heat exchanger again and carries out secondary cooling to realize cooling effect by a relatively large margin.

Further setting: the heat exchanger comprises a heat exchanger, a refrigerant flowing section on the heat exchanger, a group B of compressors, a group B of water coolers, a group B of heat exchangers, a group B of water coolers and a circulating loop, wherein the group B of loops are used for enabling a group B of condensing agents to flow, and the group B of compressors and the group B of water coolers are further arranged on the group B of loops.

By adopting the technical scheme, the B condensing agent circularly flows in the group B loop, and enters the group B water cooler after being compressed into high-temperature and high-pressure gas by the group B compressor, and the group B water cooler cools the B condensing agent into low-temperature and low-pressure liquid which is then converged into a refrigerant flowing section in the heat exchanger. The refrigerant B in the refrigerant flowing section absorbs the heat of the refrigerant A in the heat medium flowing section, the temperature is raised, and finally the refrigerant B flows into the group B compressors, thereby completing a cycle.

Further setting: the water outlets of the group A water cooler and the group B water cooler are connected with water outlet pipes, and water temperature probes and water flow switches are arranged on the water outlet pipes.

By adopting the technical scheme, the water temperature probe detects the temperature of the water flow flowing out of the water outlet pipe, the temperature of the A group of condensing agents and the temperature of the B group of condensing agents in the water cooler are calculated and pushed by combining the flow of the water flow, and then the water flow switch is correspondingly adjusted according to the requirement to adjust the cooling efficiency of the water cooler.

Further setting: the group A loop further comprises a pressure stabilizing branch, the input end of the pressure stabilizing branch is connected between the output end of the evaporator and the input end of the group A compressor, the output end of the pressure stabilizing branch is connected between the cooling branch and the first return branch, and a pressure stabilizer and a pressure stabilizing valve are arranged on the pressure stabilizing branch.

Through adopting above-mentioned technical scheme, because this device mixes in order to adjust the temperature through the A condensing agent of different states, consequently can fluctuate from the pressure of the A condensing agent of evaporimeter outflow, when pressure is too big, the partial A condensing agent that flows out from the evaporimeter flows into the stabiliser and carries out the accumulation, and when pressure was lower, the pressure stabilizing valve opened, and the A condensing agent in the stabiliser flows into cooling branch road and first return branch road through the pressure stabilizing valve.

Further setting: and the group A loop is provided with an oil-water separator at the output end of the group A compressor.

By adopting the technical scheme, because the high-pressure steam discharged from the compressor is mixed with the lubricating oil steam, the oil-water separator separates oil particles in the high-pressure steam under the action of gravity according to the oil separating principle of reducing the air flow speed and changing the air flow direction, so that the heat transfer effect in the evaporator can be improved, and the lubricating oil can be recycled.

To sum up, the utility model discloses following beneficial effect has:

1. the corresponding valves are switched, so that the uncooled condensing agent and the cooled condensing agent are mixed with each other to achieve the temperature control effect, the condensed condensing agent is not required to be heated additionally, and the energy-saving and environment-friendly effects are achieved;

2. the temperature in the high-low temperature alternating damp-heat test box can be more accurately adjusted.

Drawings

FIG. 1 is a piping diagram of an energy-saving temperature control system of a high-low temperature alternating-humidity thermal test chamber according to a first preferred embodiment;

FIG. 2 is a piping diagram of an energy-saving temperature control system of a high-low temperature alternating-humidity thermal test chamber according to a second preferred embodiment.

In the figure, the position of the upper end of the main shaft,

1. a box body;

2. a group A of loops;

21. circulating the main road; 211. an evaporator; 212. a group A compressor; 213. an oil-water separator;

22. a voltage stabilizing branch; 221. a voltage regulator; 222. a pressure maintaining valve;

23. a cooling branch; 231. a group A water cooler; 232. a heat exchanger; 233. a cooling valve block; 2331. a first cooling valve; 2332. a second cooling valve; 234. a first cooling branch; 235. a second cooling branch; 236. a first heater; 237. a second heater;

24. a first return branch;

25. a second return branch;

26. a return valve bank; 261. a first reflux valve; 262. a second reflux valve;

3. b group of loops; 31. a group B compressor; 32. a group B water cooler; 33. a water outlet pipe; 34. a water temperature probe; 35. a water flow switch.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

First preferred embodiment:

an energy-saving temperature control system of a high-low temperature alternating humidity-heat test chamber refers to fig. 1 and comprises a chamber body 1, an evaporator 211 arranged in the chamber body 1 to cool the inside of the chamber body 1, a group A of loops 2 for a condensing agent A to flow and be connected with the evaporator 211, and a group B of loops 3 for a condensing agent B to flow, wherein the condensing agent B in the group B of loops 3 cools the condensing agent A in the group A of loops 2.

Referring to fig. 1, the group a circuit 2 includes a circulation trunk 21 and a pressure stabilizing branch 22 for regulating the pressure of the circulation trunk 21, and further includes a cooling branch 23, a first return branch 24 and a second return branch 25, which are connected to both ends of the circulation trunk 21.

The circulation trunk 21 is provided with the evaporator 211 and the group A compressor 212, the output end of the evaporator 211 is connected with the input end of the group A compressor 212, and the direction of the output end of the evaporator 211 towards the input end of the group A compressor 212 is the flowing direction of the group A refrigerant. The circulation main line 21 is also connected in series with a plurality of oil-water separators 213 at the output end of the group a compressor 212, in this embodiment, the number of the oil-water separators 213 is two, and the oil return pipes of the oil-water separators 213 are connected to the group a compressor 212.

The cooling branch 23 is provided with a group A water cooler 231, a heat exchanger 232 and a cooling valve group 233 in sequence along the flow direction of the group A refrigerant, and the group A water cooler 231 is connected to the output end of the oil-water separator 213 far away from the group A compressor 212. The heat medium flow path of heat exchanger 232 is located in cooling branch 23, the heat medium input of heat exchanger 232 is connected to the output of group a water cooler 231, the heat medium output of heat exchanger 232 is connected to first cooling branch 234 and second cooling branch 235 which are connected in parallel to cooling branch 23, and the outputs of first cooling branch 234 and second cooling branch 235 are connected to the input of evaporator 211. Cooling valve block 233 includes a first cooling valve 2331 disposed in first cooling branch 234 and a second cooling valve 2332 disposed in second cooling branch 235.

The input end of the first return branch 24 is connected to the output end of the oil-water separator 213 far from the group a compressor 212, the output end of the first return branch 24 is connected to the input end of the evaporator 211, and the first return branch 24 is provided with a first return valve 261, in this embodiment, the first return valve 261 is a solenoid valve. The input end of the second return branch 25 is connected to the output end of the evaporator 211, the output end of the second return branch 25 is connected to the input end of the first return branch 24, and the second return branch 25 is provided with a second return valve 262, in this embodiment, the second return valve 262 is a solenoid valve. First and

second return valves

261, 262 form return valve block 26 and are opened and closed simultaneously during use. Return valve block 26 and cooling valve block 233 are alternately opened and closed to control the higher temperature a refrigerant and the lower temperature a refrigerant to enter evaporator 211 and mix.

The input end of the pressure stabilizing branch 22 is connected between the output end of the evaporator 211 and the input end of the group A compressor 212, the output end of the pressure stabilizing branch 22 is connected with the cooling branch 23 and the first return branch 24, and the pressure stabilizing branch 22 is sequentially provided with a pressure stabilizer 221 and a pressure stabilizing valve 222 in the flowing direction of the A condensing agent. When the pressure of the A condensing agent in the circulation trunk line 21 is overlarge, part of the A condensing agent flowing out of the evaporator 211 flows into the voltage stabilizer 221 for storage; when the pressure is low, the pressure maintaining valve 222 is opened, and the a refrigerant in the pressure maintaining valve 221 flows into the cooling branch 23 and the first return branch 24 through the pressure maintaining valve 222.

The group B loop 3 is connected with the refrigerant flowing section of the heat exchanger 232, and is also provided with a group B compressor 31 and a group B water cooler 32, the group B loop 3 connects the refrigerant output end of the refrigerant flowing section of the heat exchanger 232 with the input end of the group B compressor 31, the output end of the group B compressor 31 with the input end of the group B water cooler 32, and the output end of the group B water cooler 32 with the input end of the heat exchanger 232 to form a circulation loop. The B refrigerant circularly flows in the B group loop 3, is compressed into high-temperature and high-pressure gas by the B group compressor 31, then enters the B group water cooler 32, and is cooled into low-temperature and low-pressure liquid by the B group water cooler 32, and then is converged into a refrigerant flowing section in the heat exchanger 232. The refrigerant B in the refrigerant flowing section absorbs the heat of the refrigerant A in the heat medium flowing section, the temperature rises, and finally, the refrigerant B flows into the compressor 31 in the group B, thereby completing a cycle.

The water outlets of the group A water cooler 231 and the group B water cooler 32 are connected with a water outlet pipe 33, and a water temperature probe 34 and a water flow switch 35 are arranged on the water outlet pipe 33. The water temperature probe 34 detects the temperature of the water flowing out of the water outlet pipe 33, and combines the flow of the water flow, so as to calculate and estimate the temperature of the A group of condensing agents and the B group of condensing agents passing through the water cooler, and then correspondingly adjust the water flow switch 35 according to the requirement to adjust the cooling efficiency of the water cooler.

The working principle of the energy-saving temperature control system of the high-low temperature alternating damp-heat test box is as follows:

when the first reflux valve 261 is opened, the a condensate with high temperature and high pressure enters the first reflux branch 24 from the circulation trunk 21 and enters the evaporator 211; when the cooling valve set 233 is opened, the a refrigerant having high temperature and high pressure enters a heat medium flow section of the heat exchanger 232, and a refrigerant flow section in the heat exchanger 232 absorbs the temperature of the heat medium flow section to cool the a refrigerant in the heat medium flow section. The first reflux valve 261 and the cooling valve block 233 are alternately opened and closed such that the a refrigerant of which the temperature of the cooling branch 23 is relatively cool is mixed with the a refrigerant of which the temperature of the first reflux branch 24 is relatively high in the evaporator 211 to reach a desired temperature. When the temperature in the box body 1 needs to be changed, the ratio of the opening time duration of the first reflux valve 261 to the opening time duration of the cooling valve bank 233 needs to be adjusted correspondingly.

Second preferred embodiment:

compared with the first preferred embodiment, referring to fig. 2, the first cooling branch 234 is further provided with a first heater 236 located between the first cooling valve 2331 and the evaporator 211, the second cooling branch 235 is further provided with a second heater 237 located between the first cooling valve 2331 and the evaporator 211, in this embodiment, the first heater 236 and the second heater 237 are both heating wires, and the heating power of the second heater 237 is higher than that of the first heater 236.

The above-mentioned embodiments are merely illustrative of the present invention, and are not intended to limit the present invention, and those skilled in the art can make modifications of the present embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent law within the scope of the present invention.

Claims

1. The energy-saving temperature control system of the high-low temperature alternating humidity-heat test box is characterized by comprising a box body (1), an evaporator (211) arranged in the box body (1), a heat exchanger (232) and an A group of compressors (212) which are arranged outside the box body (1), and an A group of loops (2) for A condensing agent to flow, wherein the A group of loops (2) comprise a circulation main loop (21), and a cooling branch (23) and a first return branch (24) which are connected to two ends of the circulation main loop (21), the evaporator (211) and the A group of compressors (212) are arranged on the circulation main loop (21) along the flowing direction of the A condensing agent, and a first return valve (261) is arranged on the first return branch (24); the heat medium flowing section of the heat exchanger (232) is arranged on the cooling branch (23), the cooling branch (23) is provided with a cooling valve group (233) at the heat medium output end of the heat exchanger (232), and the first reflux valve (261) and the cooling valve group (233) are opened and closed alternately to control the A condensing agent with higher temperature and the A condensing agent with lower temperature to enter the evaporator (211) and be mixed.

2. The energy-saving temperature control system of the high-low temperature alternating-humidity thermal test chamber according to claim 1, wherein the group A loop (2) further comprises a second return branch (25), the second return branch (25) is respectively connected to the output end of the evaporator (211) and one end of the first return valve (261) far away from the evaporator (211), and a second return valve (262) is arranged on the second return branch (25).

3. The energy-saving temperature control system of the high-low temperature alternating humid heat test box as claimed in claim 2, wherein a first cooling branch (234) and a second cooling branch (235) are arranged on the cooling branch (23), the cooling valve bank (233) comprises a first cooling valve (2331) arranged on the first cooling branch (234) and a second cooling valve (2332) arranged on the second cooling branch (235), the two ends of the first cooling branch (234) and the second cooling branch (235) are respectively connected to the heat medium output end of the heat exchanger (232) and the input end of the evaporator (211), a first heater (236) is further arranged on the first cooling branch (234), and a second heater (237) with higher power than the first heater (236) is further arranged on the second cooling branch (235).

4. The energy-saving temperature control system of the high-low temperature alternating-humidity heat test box according to claim 3, wherein the cooling branch (23) is provided with a group A water cooler (231) connected with a heat medium input end of the heat exchanger (232), and an input end of the group A water cooler (231) is connected with the circulation main circuit (21).

5. The energy-saving temperature control system of the high-low temperature alternating-humidity heat test box according to claim 4, further comprising a group B of loops (3) for flowing of a group B of condensing agents, wherein a group B of compressors (31) and a group B of water coolers (32) are further arranged on the group B of loops (3), and the group B of loops (3) connect the refrigerant output end of the refrigerant flowing section on the heat exchanger (232) with the input end of the group B of compressors (31), the output end of the group B of compressors (31) with the input end of the group B of water coolers (32), and the output end of the group B of water coolers (32) with the input end of the heat exchanger (232) to form a circulation loop.

6. The energy-saving temperature control system of the high-low temperature alternating-humidity heat test box according to claim 5, wherein water outlets of the group A water cooler (231) and the group B water cooler (32) are connected with a water outlet pipe (33), and a water temperature probe (34) and a water flow switch (35) are arranged on the water outlet pipe (33).

7. The energy-saving temperature control system of the high-low temperature alternating-humidity thermal test chamber according to claim 6, wherein the group A loop (2) further comprises a pressure stabilizing branch (22), an input end of the pressure stabilizing branch (22) is connected between an output end of the evaporator (211) and an input end of the group A compressor (212), an output end of the pressure stabilizing branch (22) is connected between the cooling branch (23) and the first return branch (24), and a pressure stabilizer (221) and a pressure stabilizing valve (222) are arranged on the pressure stabilizing branch (22).

8. The energy-saving temperature control system of the high-low temperature alternating-humidity thermal test chamber as claimed in claim 7, wherein the group A loop (2) is provided with an oil-water separator (213) at the output end of the group A compressor (212).