CN208332736U - A kind of direct condensation by contact refrigeration system with hot gas defrosting - Google Patents
A kind of direct condensation by contact refrigeration system with hot gas defrosting Download PDFInfo
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- CN208332736U CN208332736U CN201820559635.9U CN201820559635U CN208332736U CN 208332736 U CN208332736 U CN 208332736U CN 201820559635 U CN201820559635 U CN 201820559635U CN 208332736 U CN208332736 U CN 208332736U
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- outlet
- evaporator
- inlet
- subcooler
- defrosting
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 47
- 238000010257 thawing Methods 0.000 title claims abstract description 31
- 238000009833 condensation Methods 0.000 title claims description 15
- 230000005494 condensation Effects 0.000 title claims description 15
- 239000012530 fluid Substances 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 239000011555 saturated liquid Substances 0.000 claims abstract description 7
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 230000002427 irreversible effect Effects 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000001112 coagulating effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000006837 decompression Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004781 supercooling Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 239000012047 saturated solution Substances 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000013526 supercooled liquid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Defrosting Systems (AREA)
Abstract
本实用新型公开带热气融霜的直接接触冷凝制冷系统，其制冷压缩机出口一路接直接接触换热器高温气体入口，一路经调压阀后经截止阀接两并联蒸发器融霜气体入口，两蒸发器融霜凝结液体出口经截止阀后接过冷器融霜流体换热管入口，融霜流体换热管出口与两蒸发器低温气体出口接制冷压缩机入口；过冷器过冷液体出口一路接直接接触换热器过冷液体入口，一路分别经电磁阀、热力膨胀阀接两蒸发器低温低压液体入口；直接接触换热器饱和液体出口接过冷器饱和液体入口；过冷器冷流体换热管出口与涡流管热流体出口接辅助制冷压缩机入口，辅助制冷压缩机出口经冷凝器接涡流管主流体入口，涡流管冷流体出口接冷流体换热管入口。本实用新型能减少循环不可逆损失。
The utility model discloses a direct contact condensing refrigeration system with hot gas defrosting. The outlet of the refrigeration compressor is connected to the high temperature gas inlet of the direct contact heat exchanger, and the outlet of the refrigeration compressor is connected to the defrosting gas inlets of two parallel evaporators through a pressure regulating valve and a stop valve. The defrosting and condensed liquid outlet of the two evaporators is connected to the inlet of the defrosting fluid heat exchange tube of the subcooler after passing through the stop valve, and the outlet of the defrosting fluid heat exchange tube and the low temperature gas outlet of the two evaporators are connected to the inlet of the refrigeration compressor; the subcooling liquid of the subcooler One outlet is connected to the subcooled liquid inlet of the direct contact heat exchanger, and the other is connected to the low temperature and low pressure liquid inlets of the two evaporators through the solenoid valve and thermal expansion valve respectively; the saturated liquid outlet of the direct contact heat exchanger is connected to the saturated liquid inlet of the subcooler; the subcooler The outlet of the cold fluid heat exchange tube and the hot fluid outlet of the vortex tube are connected to the inlet of the auxiliary refrigeration compressor, the outlet of the auxiliary refrigeration compressor is connected to the main fluid inlet of the vortex tube through the condenser, and the cold fluid outlet of the vortex tube is connected to the inlet of the cold fluid heat exchange tube. The utility model can reduce the cycle irreversible loss.
Description
Technical field
The utility model relates to freezing and refrigeration refrigeration technology fields, and in particular to a kind of directly contact with hot gas defrosting is cold
Solidifying refrigeration system.
Background technique
In conventional freezing cold storage refrigeration system, between being between the high temperature and high pressure gas and cooling medium of refrigeration compressor discharge
Wall type heat transfer, the thermal resistance of condensing heat exchanger is big, and heat transfer coefficient is low, and heat transfer temperature difference is caused to increase, and the pressure ratio of refrigeration compressor increases,
Volumetric efficiency reduces, wasted work increases, system performance decline.
Utility model content
The purpose of this utility model and is provided a kind of with hot gas defrosting for technological deficiency existing in the prior art
Direct condensation by contact refrigeration system.
It is for technical solution used by realization the purpose of this utility model:
A kind of direct condensation by contact refrigeration system with hot gas defrosting, comprising:
Refrigeration compressor, the first evaporator, the second evaporator, subcooler, vortex tube, assisted refrigeration compressor, condenser,
Direct contact heat transfer device；The outlet of refrigeration compressor is divided into two-way, connects all the way with the high-temperature gas entrance of direct contact heat transfer device
It connects, another way divides two-way after pressure regulator valve and respectively through the first shut-off valve, the second shut-off valve and the first evaporator in parallel, second
The defrosting gas access of evaporator connects, and third is passed through in the defrosting coagulating liq outlet of the first evaporator, the second evaporator respectively
It is in parallel after shut-off valve, the 4th shut-off valve, and connect with the entrance of the defrosting fluid heat transfer pipe of subcooler, defrosting fluid heat transfer pipe
It exports and is connect with after the cryogenic gas of the first evaporator, the second evaporator outlet parallel connection with the entrance of refrigeration compressor；Subcooler
Subcooled liquid outlet be divided into two-way, connect with direct contact heat transfer device subcooled liquid entrance, pass sequentially through respectively all the way all the way
One solenoid valve, a heating power expansion valve are connect with the low temperature and low pressure liquid entrance of the first evaporator, the second evaporator；Directly contact is changed
The saturated liquid outlet of hot device is connect with the saturated liquid entrance of subcooler；The outlet of assisted refrigeration compressor and entering for condenser
Mouth connection, the outlet of condenser and the main fluid entrance of vortex tube connect, the cold fluid outlet of vortex tube and the cold flow of subcooler
The entrance of body heat exchanger tube connects, and makes after the outlet of the cold fluid heat exchanger tube of subcooler is in parallel with vortex tube hot fluid outlet ports with auxiliary
The entrance of cold compressor connects.
The opening and closing of the solenoid valve, it is thick by the frost layer installed on the first evaporator and the second evaporator surface respectively
Spend detection sensor control.
The high temperature and high pressure gas and supercooled liquid of the refrigeration compressor discharge of the utility model directly contact condensation heat transfer, utilize
The high-temperature gas defrosting of refrigeration compressor discharge, cold source of the defrosting condensation water for directly contact condensation circulation subcooler；And it is auxiliary
Supercooling is helped to recycle the eddy expansion decompression of vortex tube, the cold air isolated provides cold source for subcooler, reduces circulation
Irreversible loss effectively improves the performance of system, economizes on resources, and protects environment.
Detailed description of the invention
Fig. 1 is the schematic diagram of the direct condensation by contact refrigeration system with hot gas defrosting of the utility model.
Specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that this place
The specific embodiment of description is only used to explain the utility model, is not used to limit the utility model.
It is shown in Figure 1, a kind of direct condensation by contact refrigeration system with hot gas defrosting, comprising:
Refrigeration compressor 1, pressure regulator valve 2, the first shut-off valve 3, the first evaporator 4, the second shut-off valve 5, the second evaporator 6,
4th shut-off valve 7, the second heating power expansion valve 8, second solenoid valve 9, the first heating power expansion valve 10, the first solenoid valve 11, third are cut
Only valve 12, subcooler 13, vortex tube 14, assisted refrigeration compressor 15, condenser 16, direct contact heat transfer device 17.
The outlet of the refrigeration compressor 1 is divided into two-way, connects all the way with the high-temperature gas entrance of direct contact heat transfer device 17
Connect, another way pass through pressure regulator valve 2 after be divided into two-way, respectively by the first shut-off valve 3, the second shut-off valve 5 and the first evaporator 4,
The defrosting gas access of second evaporator 6 connects, and the defrosting coagulating liq outlet of the first evaporator 4, the second evaporator 6 passes through respectively
It crosses in parallel after third shut-off valve 12, the 4th shut-off valve 7, then connect, melt with the entrance of the defrosting fluid heat transfer pipe of subcooler 13
White fluid heat transfer pipe outlet it is in parallel with the first evaporator 4, the cryogenic gas outlet of the second evaporator 6, then with refrigerant compression
The entrance of machine 1 connects.
The subcooler 13 subcooled liquid outlet is divided into two-way, all the way with 17 subcooled liquid entrance of direct contact heat transfer device
Connection, is taken up in order of priority swollen by the first solenoid valve 11, the first heating power expansion valve 10 and second solenoid valve 9, the second heating power all the way
Swollen valve 8 is connect with the low temperature and low pressure liquid entrance of the first evaporator 4, the second evaporator 6, the saturated solution of direct contact heat transfer device 17
Body outlet is connect with the saturated liquid entrance of subcooler 13.
The outlet of the assisted refrigeration compressor 15 is connect with the entrance of condenser 16, the outlet of condenser 16 and vortex tube
14 main fluid entrance connection, the entrance of the cold fluid heat exchanger tube of the cold fluid outlet and subcooler 13 of vortex tube 14 are connect, mistake
Entrance after the outlet of the cold fluid heat exchanger tube of cooler 13 is in parallel with 14 hot fluid outlet ports of vortex tube with assisted refrigeration compressor 15
Connection.
Wherein, the defrosting coagulating liq outlet of first evaporator 4, the second evaporator 6 enters with low temperature and low pressure liquid
Mouth is that (setting as shown in Figure 1 draws two pipelines in parallel by same aperture, and on two pipelines in parallel in same aperture
Shut-off valve and/or solenoid valve are installed, and by the opening and closing of shut-off valve and/or solenoid valve, realize that corresponding liquid disengaging first is steamed
Send out device 4, the second evaporator 6) or the in parallel pipeline of parallel arrangement of different orifice connection, and be arranged on pipeline shut-off valve,
Solenoid valve, to realize that corresponding liquid passes in and out the first evaporator 4, the second evaporator 6 respectively.
Wherein, the opening and closing of first solenoid valve 11 and second solenoid valve 9 can be respectively by the first evaporator
4 and 6 surface of the second evaporator installation frost thickness detection sensor controlled.
When system operates to two cold cooling supply, the gas that assisted refrigeration compressor 15 is discharged is put in condenser 16
Thermal coagulation, liquid enter vortex tube 14, and in volute chamber eddy expansion, the cold fluid for separating generation is absorbed heat in subcooler 13, based on
Liquid supercooling provides cold source in the subcooler 13 of circulation, enters assisted refrigeration compressor 15 after heat absorption with hot gas.First electromagnetism
Valve 11 and second solenoid valve 9 are opened, and the first shut-off valve 3 and the second shut-off valve 5 are closed, the discharge of the refrigeration compressor 1 of major cycle
High temperature and high pressure gas enter direct contact heat transfer device 17 be subcooled through subcooler 13 a part of liquid mixing directly contact coagulate
Knot, the saturated solution of outflow enter the supercooling of subcooler 13, and another part liquid that subcooler 13 is subcooled is taken up in order of priority through the first electricity
Magnet valve 11,10 reducing pressure by regulating flow of the first heating power expansion valve and second solenoid valve 9,8 reducing pressure by regulating flow of the second heating power expansion valve enter the
One evaporator 4, the second evaporator 6 are cold cooling supply, and the gas of heat absorption returns to the refrigeration compressor 1 of major cycle.
When the first evaporator 4 freezes, 6 surface frost layer of the second evaporator is thickened, and needs defrosting, then the first solenoid valve 11 is beaten
It opens, second solenoid valve 9 is closed, and the first shut-off valve 3 and third shut-off valve 12 are closed, and the second shut-off valve 5 and the 4th shut-off valve 7 are beaten
It opens, is vented from major cycle refrigeration compressor 1 and draws high temperature and high pressure gas after the decompression of pressure regulator valve 2, enter the through the second shut-off valve 5
Two evaporators 6 release heat, melt the frost layer on surface, the liquid of condensation enters subcooler 13, provides cold source for main circulating liquid.
When the second evaporator 6 freezes, 4 surface frost layer of the first evaporator is thickened, and needs defrosting, then the first solenoid valve 11 closes
It closes, second solenoid valve 9 is opened, and the first shut-off valve 3 and third shut-off valve 12 are opened, and the second shut-off valve 5 and the 4th shut-off valve 7 close
It closes, is vented from major cycle refrigeration compressor 1 and draws high temperature and high pressure gas after the decompression of pressure regulator valve 2, enter the through the first shut-off valve 3
One evaporator 4 releases heat, melts the frost layer on surface, the liquid of condensation enters subcooler 13, provides cold source for main circulating liquid.
The utility model can reduce the delivery temperature of refrigeration compressor using the condensing heat exchanger of directly contact condensation,
Pressure ratio is reduced, volumetric efficiency is improved, wasted work is reduced, improves the performance of refrigeration system；Cold interior evaporator surface frosting, reference
The high-temperature gas of refrigeration compressor discharge enters evaporator, and defrosting is rapid, small to cold flow, and defrosting process gas is solidifying
The waste cold that knot liquid band has, can be with reasonable energy utilization for directly contacting the cold source of condensation circulation subcooler.Subcooler cooling supply mentions
For cold source auxiliary SAPMAC method, using vortex tube eddy expansion be depressured, reduce the irreversible loss of circulation, that isolates is cold
Gas heat absorption provides cold source for subcooler, can effectively improve the performance of system, economizes on resources, and protects environment, has important
Meaning.
The above is only the preferred embodiment of the utility model, it is noted that for the general of the art
For logical technical staff, without departing from the principle of this utility model, several improvements and modifications can also be made, these change
It also should be regarded as the protection scope of the utility model into retouching.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820559635.9U CN208332736U (en) | 2018-04-19 | 2018-04-19 | A kind of direct condensation by contact refrigeration system with hot gas defrosting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820559635.9U CN208332736U (en) | 2018-04-19 | 2018-04-19 | A kind of direct condensation by contact refrigeration system with hot gas defrosting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208332736U true CN208332736U (en) | 2019-01-04 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820559635.9U Expired - Fee Related CN208332736U (en) | 2018-04-19 | 2018-04-19 | A kind of direct condensation by contact refrigeration system with hot gas defrosting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208332736U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108458511A (en) * | 2018-04-19 | 2018-08-28 | 天津商业大学 | It is a kind of to be in direct contact condensation refrigerating system with hot gas defrosting |
| CN109682102A (en) * | 2019-01-28 | 2019-04-26 | 天津商业大学 | Direct condensation by contact cryogenic refrigerating system with injection injection |
| CN110986461A (en) * | 2019-12-25 | 2020-04-10 | 天津商业大学 | A refrigeration control system for one machine and two warehouses |
-
2018
- 2018-04-19 CN CN201820559635.9U patent/CN208332736U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108458511A (en) * | 2018-04-19 | 2018-08-28 | 天津商业大学 | It is a kind of to be in direct contact condensation refrigerating system with hot gas defrosting |
| CN108458511B (en) * | 2018-04-19 | 2020-02-14 | 天津商业大学 | Direct contact condensation refrigerating system with hot gas defrosting function |
| CN109682102A (en) * | 2019-01-28 | 2019-04-26 | 天津商业大学 | Direct condensation by contact cryogenic refrigerating system with injection injection |
| CN110986461A (en) * | 2019-12-25 | 2020-04-10 | 天津商业大学 | A refrigeration control system for one machine and two warehouses |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190104 Termination date: 20190419 |
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| CF01 | Termination of patent right due to non-payment of annual fee |