CN203533945U - One-machine screw rod compression refrigeration cycle system with air supplementation through high and low pressure - Google Patents
One-machine screw rod compression refrigeration cycle system with air supplementation through high and low pressure Download PDFInfo
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- CN203533945U CN203533945U CN201320523020.8U CN201320523020U CN203533945U CN 203533945 U CN203533945 U CN 203533945U CN 201320523020 U CN201320523020 U CN 201320523020U CN 203533945 U CN203533945 U CN 203533945U
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- pressure stage
- low
- pressure
- economizer
- tonifying
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Abstract
The utility model discloses a one-machine screw rod compression refrigeration cycle system with air supplementation through high and low pressure. The one-machine screw rod compression refrigeration cycle system is wider in refrigeration temperature range, and comprises a condenser, a screw rod refrigeration compressor, an evaporator, a thermal expansion valve, a second economizer, a first economizer and an intermediate cooler. The screw rod refrigeration compressor is composed of a low-pressure section, a high-pressure section and a motor. The low-pressure section is provided with a low-pressure air inlet connection pipe, a low-pressure air supplementation connection pipe and a low-pressure exhaust connection pipe. The high-pressure section is provided with a high-pressure air inlet connection pipe, a high-pressure air supplementation connection pipe and a high-pressure exhaust connection pipe. An outlet connection pipe located at the shell side of the second economizer is connected with an inlet of the evaporator through the thermal expansion valve, an outlet of the evaporator is connected with the low-pressure air inlet connection pipe, the low-pressure exhaust connection pipe is connected in parallel with a gas outlet of the intermediate cooler and then connected with the high-pressure air inlet connection pipe, an outlet connection pipe of the pipe side of the first economizer is connected with the high-pressure air supplementation connection pipe, and an outlet connection pipe of pipe side of the second economizer is connected with the low-pressure air supplementation connection pipe.
Description
Technical field
The utility model relates to refrigeration technology field, particularly relates to a kind of unit low temperature screw-compression mechanism cold circulation system with two-stage economizer for lower temperature refrigeration occasion.
Background technology
The screw type refrigerating compressor features such as insensitive and runnability is good because its volumetric efficiency is high, to liquid hammer, are more and more subject to user to pay close attention to, and are widely used in various cooling cycle systems.For closing by awkward silence at a meeting of lower temperature, be to adopt single machine two-stage screw bolt refrigerant compressor or the cooling cycle system of two-shipper combo formula two-stage screw bolt refrigerant compressor mostly.
At present, dual-stage screw refrigerating compressor circulation system complex structure for existing lower temperature refrigeration occasion, to produce temperature range limited.If need to produce lower temperature, the evaporating temperature of kind of refrigeration cycle reduces, and pressure ratio increases, and the wasted work of the circulatory system increases, hydraulic performance decline.Therefore the unit low temperature screw type refrigerating compressor circulatory system that, urgently development structure is compact, control is simple, runnability is high.
Utility model content
The purpose of this utility model is the defect for prior art, provide a kind of simple in structure, produce the unit low temperature screw-compression mechanism cold circulation system with two-stage economizer that temperature is lower.
For realizing the technical scheme that the purpose of this utility model adopts, be:
A unit screw compression cooling cycle system for high-low pressure tonifying Qi, comprises condenser, Spiral Lobe Refrigeration Compressor, evaporimeter, heating power expansion valve, the second economizer, the second electric expansion valve, the second choke valve, the first economizer, the first electric expansion valve, check valve, first throttle valve and intercooler, described Spiral Lobe Refrigeration Compressor is comprised of low pressure stage, high pressure section and motor, on described low pressure stage, be respectively arranged with low-pressure stage air inlet tube, low-pressure stage tonifying Qi adapter and low-pressure stage vent connection, described low-pressure stage air inlet tube is positioned at the side away from described high pressure section, and described low-pressure stage vent connection is positioned at the side near described high pressure section, on described high pressure section, be respectively arranged with hiigh pressure stage air inlet tube, hiigh pressure stage tonifying Qi adapter and hiigh pressure stage vent connection, described hiigh pressure stage air inlet tube is positioned at the side near described low pressure stage, and described hiigh pressure stage blast pipe is positioned at the side away from described low pressure stage, described hiigh pressure stage vent connection is connected with the import of described condenser, the outlet of described condenser is divided into three tunnels, one tunnel is connected with the feed flow import of described intercooler through described first throttle valve, one tunnel is taken over and is connected with the pipe side-entrance of described the first economizer through described the first electric expansion valve, and a road is taken over and is connected with the shell-side inlet of described the first economizer, the tapping of described intercooler is taken over shell-side discharge connection through described the second choke valve and described the first economizer and is divided into two tunnels after in parallel, one tunnel is taken over and is connected with the pipe side-entrance of described the second economizer through described the second electric expansion valve, and a road is taken over and is connected with the shell-side inlet of described the second economizer, the shell-side discharge connection of described the second economizer is connected with the entrance of described evaporimeter through described heating power expansion valve, the outlet of described evaporimeter is connected with the low-pressure stage air inlet tube of described Spiral Lobe Refrigeration Compressor, after the gas vent parallel connection of described low-pressure stage vent connection and described intercooler, be connected with described hiigh pressure stage air inlet tube, described check valve is installed on the gas vent of described intercooler, the pipe side outlet of described the first economizer is taken over the hiigh pressure stage tonifying Qi of described Spiral Lobe Refrigeration Compressor high pressure section and is taken over and be connected, and the pipe side outlet of described the second economizer is taken over the low-pressure stage tonifying Qi of described Spiral Lobe Refrigeration Compressor low pressure stage and taken over and be connected, the tonifying Qi position of described low pressure stage is provided with low pressure stage pressure sensor, the tonifying Qi position of described high pressure section is provided with high pressure section pressure sensor, described low pressure stage pressure sensor is connected with high pressure section pressure signal input with the low pressure stage pressure signal input of refrigeration controler respectively with high pressure section pressure sensor, the low-pressure stage control signal output of described refrigeration controler is connected with the control end of described the second expansion valve, the hiigh pressure stage control signal output of described refrigeration controler is connected with the control end of described the first expansion valve, by the aperture of the second expansion valve described in the signal controlling of described low pressure stage pressure sensor, by the aperture of the first expansion valve described in the signal controlling of described high pressure section pressure sensor.
The middle part that is positioned at described Spiral Lobe Refrigeration Compressor high pressure section is taken in described hiigh pressure stage tonifying Qi.
The middle part that is positioned at described Spiral Lobe Refrigeration Compressor low pressure stage is taken in described low-pressure stage tonifying Qi.
Compared with prior art, the beneficial effects of the utility model are:
1, the unit screw compression cooling cycle system of high-low pressure tonifying Qi of the present utility model, the high pressure section of unit Spiral Lobe Refrigeration Compressor and low pressure stage are respectively with economizer, can either carry out the tonifying Qi of hiigh pressure stage, can carry out the tonifying Qi of low-pressure stage again, cooling cycle system can be produced lower evaporating temperature, and the use awkward silence at a meeting that meets lower temperature is required.
2, the unit screw compression cooling cycle system of high-low pressure tonifying Qi of the present utility model, owing to taking tonifying Qi in the middle of high-low pressure, increases the refrigerating capacity of high-low pressure section, and the performance of kind of refrigeration cycle is good, energy-conserving and environment-protective.
3, the unit screw compression cooling cycle system of high-low pressure tonifying Qi of the present utility model, the signal that the open degree size of described the second electric expansion valve is passed over by the pressure sensor of low pressure stage tonifying Qi position is controlled automatically, the signal that the first electric expansion valve is passed over by the pressure sensor of high pressure section tonifying Qi position is controlled automatically, make two economizer collaborative works, to produce lower evaporating temperature, meet lower temperature use awkward silence at a meeting needs.
4, the unit screw compression cooling cycle system of high-low pressure tonifying Qi of the present utility model, the appearance and size of refrigeration compressor is little, compact conformation.
Accompanying drawing explanation
Figure 1 shows that the unit screw compression cooling cycle system schematic diagram of the utility model high-low pressure tonifying Qi;
Figure 2 shows that the structural representation of screw type refrigerating compressor;
Figure 3 shows that the adapter schematic diagram of the first economizer;
Figure 4 shows that the adapter schematic diagram of the second economizer.
In figure: 1. condenser, 2. Spiral Lobe Refrigeration Compressor, 3. evaporimeter, 4. heating power expansion valve, 5. the second economizer, 6. the second electric expansion valve, 7. the second choke valve, 8. the first economizer, 9. the first electric expansion valve, 10. check valve, 11. first throttle valves, 12. intercoolers, 13. hiigh pressure stage air inlet tubes, 14. low-pressure stage air inlet tubes, 15. motors, 16. low pressure stages, 17. low-pressure stage tonifying Qi are taken over, 18. low-pressure stage vent connections, 19. hiigh pressure stage tonifying Qi are taken over, 20. hiigh pressure stage vent connections, 21. high pressure sections, the shell-side discharge connection of 22. first economizers, the pipe side outlet of 23. first economizers is taken over, the shell-side inlet of 24. first economizers is taken over, the pipe side-entrance of 25. first economizers is taken over, the shell-side discharge connection of 26. second economizers, the pipe side outlet of 27. second economizers is taken over, the shell-side inlet of 28. second economizers is taken over, the pipe side-entrance of 29. second economizers is taken over.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
The unit screw compression cooling cycle system schematic diagram of the utility model high-low pressure tonifying Qi as shown in Figures 1 to 4, comprises condenser 1, Spiral Lobe Refrigeration Compressor 2, evaporimeter 3, heating power expansion valve 4, the second economizer 5, the second electric expansion valve 6, the second choke valve 7, the first economizer 8, the first electric expansion valve 9, check valve 10, first throttle valve 11 and intercooler 12.Described Spiral Lobe Refrigeration Compressor 2 is comprised of low pressure stage 16, high pressure section 21 and motor 15, on described low pressure stage 16, be respectively arranged with low-pressure stage air inlet tube 14, low-pressure stage tonifying Qi adapter 17 and low-pressure stage vent connection 18, described low-pressure stage air inlet tube 14 is positioned at the side away from described high pressure section 21, and described low-pressure stage vent connection 18 is positioned at the side near described high pressure section 21; On described high pressure section, be respectively arranged with hiigh pressure stage air inlet tube 13, hiigh pressure stage tonifying Qi adapter 19 and hiigh pressure stage vent connection 20, described hiigh pressure stage air inlet tube 13 is positioned at the side near described low-pressure stage 16, and described hiigh pressure stage blast pipe 20 is positioned at the side away from described low-pressure stage 16.Described hiigh pressure stage tonifying Qi adapter 19 is preferably positioned at the middle part of described Spiral Lobe Refrigeration Compressor high pressure section 21.Described low-pressure stage tonifying Qi adapter 17 is preferably positioned at the middle part of described Spiral Lobe Refrigeration Compressor low pressure stage 16.Described hiigh pressure stage vent connection 20 is connected with the import of described condenser 1, the outlet of described condenser 1 is divided into three tunnels, one tunnel is connected with the feed flow import of described intercooler 12 through described first throttle valve 11, one tunnel is taken over 25 through described the first electric expansion valve 9 with the pipe side-entrance of described the first economizer and is connected, and a road is taken over 24 with the shell-side inlet of described the first economizer and is connected; The tapping of described intercooler 12 is taken over shell-side discharge connection 22 through described the second choke valve 7 and described the first economizer and is divided into two tunnels after in parallel; one tunnel is taken over 29 through described the second electric expansion valve 6 with the pipe side-entrance of described the second economizer and is connected, and a road is taken over 28 with the shell-side inlet of described the second economizer and is connected; The shell-side discharge connection 26 of described the second economizer is connected with the entrance of described evaporimeter 3 through described heating power expansion valve 4, the outlet of described evaporimeter 3 is connected with the low-pressure stage air inlet tube 14 of described Spiral Lobe Refrigeration Compressor, after the gas vent parallel connection of described low-pressure stage vent connection 18 and described intercooler 12, be connected with described hiigh pressure stage air inlet tube 13, described check valve 10 is installed on the gas vent of described intercooler.The pipe side outlet of described the first economizer is taken over 23 and is connected with the hiigh pressure stage tonifying Qi adapter 19 of described Spiral Lobe Refrigeration Compressor high pressure section, and the pipe side outlet of described the second economizer is taken over 27 and is connected with the low-pressure stage tonifying Qi adapter 17 of described Spiral Lobe Refrigeration Compressor low pressure stage.The tonifying Qi position of described low pressure stage 16 is provided with low pressure stage pressure sensor, the tonifying Qi position of described high pressure section 21 is provided with high pressure section pressure sensor, described low pressure stage pressure sensor is connected with high pressure section pressure signal input with the low pressure stage pressure signal input of refrigeration controler respectively with high pressure section pressure sensor, the low-pressure stage control signal output of described refrigeration controler is connected with the control end of described the second expansion valve 6, the hiigh pressure stage control signal output of described refrigeration controler is connected with the control end of described the first expansion valve 9, by the aperture of the second expansion valve 6 described in the signal controlling of described low pressure stage pressure sensor, by the aperture of the first expansion valve 9 described in the signal controlling of described high pressure section pressure sensor.When the pressure of the high pressure section tonifying Qi position that high pressure section pressure sensor spreads out of is high, by the hiigh pressure stage control signal output of refrigeration controler, control described the first expansion valve 9, its aperture is reduced, the refrigerant flow entering in the first economizer 8 pipes by the first expansion valve 9 reduces, outlet temperature after tube refrigerant heat absorption raises, pressure raises, and takes over 19 make-up gas by hiigh pressure stage tonifying Qi, enters smoothly in the cylinder of high pressure section 21; When the pressure of the high pressure section tonifying Qi position that high pressure section pressure sensor spreads out of is low, by the hiigh pressure stage control signal output of refrigeration controler, control described the first expansion valve 9, its aperture is increased, the refrigerant flow entering in the first economizer 8 pipes by the first expansion valve 9 increases, outlet temperature after tube refrigerant heat absorption reduces, pressure decreased, the make-up gas by hiigh pressure stage tonifying Qi adapter 19, enters in the cylinder of high pressure section 21 smoothly.When the pressure of the low pressure stage tonifying Qi position that low pressure stage pressure sensor spreads out of is high, by the low-pressure stage control signal output of refrigeration controler, control described the second expansion valve 6, its aperture is reduced, the refrigerant flow entering in the second economizer 5 pipes by the second expansion valve 6 reduces, outlet temperature after tube refrigerant heat absorption raises, pressure raises, and takes over 17 make-up gas by low-pressure stage tonifying Qi, enters smoothly in the cylinder of low pressure stage 16; When the pressure of the low pressure stage tonifying Qi position that low pressure stage pressure sensor spreads out of is low, by the low-pressure stage control signal output of refrigeration controler, control described the second expansion valve 6, its aperture is increased, the refrigerant flow entering in the second economizer 5 pipes by the second expansion valve 6 increases, outlet temperature after tube refrigerant heat absorption reduces, pressure decreased, the make-up gas by low-pressure stage tonifying Qi adapter 17, enters in the cylinder of low pressure stage 16 smoothly.
When starting kind of refrigeration cycle, under the drive of motor 15, Spiral Lobe Refrigeration Compressor 2 runnings, low pressure stage 16 absorbs the low-temperature low-pressure refrigerant gas of evaporimeter 3 through low-pressure stage air inlet tube 14, through being compressed to intermediate pressure mix with the tonifying Qi of the second economizer 5 after further compression pressure raise, through low-pressure stage vent connection 18, discharge low pressure stage 16, mix by hiigh pressure stage air inlet tube 13 and enter high pressure section 21 with the gas of intercooler 12, through being compressed to intermediate pressure mix with the tonifying Qi of the first economizer 8 after further compression pressure raise, through hiigh pressure stage vent connection 20, discharge high pressure section 21, the high temperature and high pressure gas of discharging Spiral Lobe Refrigeration Compressor 2 enters condenser 1, condenser 1 high temperature high pressure liquid is out divided into three tunnels, the gas-liquid mixture fluid of one tunnel after first throttle valve 11 reducing pressure by regulating flows enters intercooler 12, one tunnel is through the first electric expansion valve 9 reducing pressure by regulating flows, gas-liquid mixture fluid after temperature and pressure reduces, through the pipe side-entrance of the first economizer, taking over 25 enters in the first economizer heat exchanger tube, from the shell-side inlet of the first economizer, take over 24 liquid heat-exchange that enter the first economizer heat exchanger tube with another road, the gas process hiigh pressure stage tonifying Qi that the heat of vaporization of the outer liquid of absorption tube generates is taken over 19 tonifying Qi to the middle tonifying Qi position of high pressure section 21, after mixing, the gas that the gas on intercooler 12 tops is discharged with low pressure stage 16 through check valve 10 enters high pressure section 21 through hiigh pressure stage air inlet tube 13, the liquid of intercooler 12 bottoms is divided into two tunnels after mixing with the outer liquid of pipe of the first economizer shell-side discharge connection 22 through the second choke valve 7, one tunnel is through the second electric expansion valve 6 reducing pressure by regulating flows, gas-liquid mixture fluid after temperature and pressure reduces, through the pipe side-entrance of the second economizer, taking over 29 enters in heat exchanger tube, from the shell-side inlet of the second economizer, take over 28 liquid heat-exchange that enter the second economizer heat exchanger tube with another road, the gas process low-pressure stage tonifying Qi that the heat of vaporization of the outer liquid of absorption tube generates is taken over 17 tonifying Qi to the middle tonifying Qi position of low pressure stage 16, liquid outside the second economizer 5 heat exchanger tubes enters evaporimeter 3 through heating power expansion valve 4 reducing pressure by regulating flows and absorbs cold heat, provides low-temperature receiver for cold.
The above is only preferred embodiment of the present utility model; it should be noted that; for those skilled in the art; do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (3)
1. the unit screw compression cooling cycle system of a high-low pressure tonifying Qi, it is characterized in that, comprise condenser (1), Spiral Lobe Refrigeration Compressor (2), evaporimeter (3), heating power expansion valve (4), the second economizer (5), the second electric expansion valve (6), the second choke valve (7), the first economizer (8), the first electric expansion valve (9), check valve (10), first throttle valve (11) and intercooler (12), described Spiral Lobe Refrigeration Compressor (2) is comprised of low pressure stage (16), high pressure section (21) and motor (15), on described low pressure stage (16), be respectively arranged with low-pressure stage air inlet tube (14), low-pressure stage tonifying Qi adapter (17) and low-pressure stage vent connection (18), described low-pressure stage air inlet tube (14) is positioned at the side away from described high pressure section (21), and described low-pressure stage vent connection (18) is positioned at the side near described high pressure section (21), on described high pressure section (21), be respectively arranged with hiigh pressure stage air inlet tube (13), hiigh pressure stage tonifying Qi adapter (19) and hiigh pressure stage vent connection (20), described hiigh pressure stage air inlet tube (13) is positioned at the side near described low pressure stage (16), and described hiigh pressure stage blast pipe (20) is positioned at the side away from described low pressure stage (16), described hiigh pressure stage vent connection (20) is connected with the import of described condenser (1), the outlet of described condenser (1) is divided into three tunnels, one tunnel is connected with the feed flow import of described intercooler (12) through described first throttle valve (11), one tunnel is taken over (25) through described the first electric expansion valve (9) with the pipe side-entrance of described the first economizer and is connected, and a road is taken over (24) with the shell-side inlet of described the first economizer and is connected, the tapping of described intercooler (12) is taken over shell-side discharge connection (22) through described the second choke valve (7) and described the first economizer and is divided into two tunnels after in parallel, one tunnel is taken over (29) through described the second electric expansion valve (6) with the pipe side-entrance of described the second economizer and is connected, and a road is taken over (28) with the shell-side inlet of described the second economizer and is connected, the shell-side discharge connection (26) of described the second economizer is connected with the entrance of described evaporimeter (3) through described heating power expansion valve (4), the outlet of described evaporimeter (3) is connected with the low-pressure stage air inlet tube (14) of described Spiral Lobe Refrigeration Compressor, after the gas vent parallel connection of described low-pressure stage vent connection (18) and described intercooler (12), be connected with described hiigh pressure stage air inlet tube (13), described check valve (10) is installed on the gas vent of described intercooler, the pipe side outlet of described the first economizer is taken over (23) and is connected with the hiigh pressure stage tonifying Qi adapter (19) of described Spiral Lobe Refrigeration Compressor high pressure section, and the pipe side outlet of described the second economizer is taken over (27) and is connected with the low-pressure stage tonifying Qi adapter (17) of described Spiral Lobe Refrigeration Compressor low pressure stage, the tonifying Qi position of described low pressure stage (16) is provided with low pressure stage pressure sensor, the tonifying Qi position of described high pressure section (21) is provided with high pressure section pressure sensor, described low pressure stage pressure sensor is connected with high pressure section pressure signal input with the low pressure stage pressure signal input of refrigeration controler respectively with high pressure section pressure sensor, the low-pressure stage control signal output of described refrigeration controler is connected with the control end of described the second expansion valve (6), the hiigh pressure stage control signal output of described refrigeration controler is connected with the control end of described the first expansion valve (9), by the aperture of the second expansion valve (6) described in the signal controlling of described low pressure stage pressure sensor, by the aperture of the first expansion valve (9) described in the signal controlling of described high pressure section pressure sensor.
2. the unit screw compression cooling cycle system of high-low pressure tonifying Qi according to claim 1, is characterized in that, the middle part that (19) are positioned at described Spiral Lobe Refrigeration Compressor high pressure section (21) is taken in described hiigh pressure stage tonifying Qi.
3. the unit screw compression cooling cycle system of high-low pressure tonifying Qi according to claim 1 and 2, is characterized in that, the middle part that (17) are positioned at described Spiral Lobe Refrigeration Compressor low pressure stage (16) is taken in described low-pressure stage tonifying Qi.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320523020.8U CN203533945U (en) | 2013-08-26 | 2013-08-26 | One-machine screw rod compression refrigeration cycle system with air supplementation through high and low pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320523020.8U CN203533945U (en) | 2013-08-26 | 2013-08-26 | One-machine screw rod compression refrigeration cycle system with air supplementation through high and low pressure |
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| Publication Number | Publication Date |
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| CN203533945U true CN203533945U (en) | 2014-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320523020.8U Expired - Fee Related CN203533945U (en) | 2013-08-26 | 2013-08-26 | One-machine screw rod compression refrigeration cycle system with air supplementation through high and low pressure |
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| CN (1) | CN203533945U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411338A (en) * | 2013-08-26 | 2013-11-27 | 天津商业大学 | Screw compressor refrigeration cycle system with two-stage economizers |
| CN106403336A (en) * | 2016-11-02 | 2017-02-15 | 广州欧亚制冷设备制造有限公司 | Screw type ultralow temperature one-machine two-stage unit system and control method |
-
2013
- 2013-08-26 CN CN201320523020.8U patent/CN203533945U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411338A (en) * | 2013-08-26 | 2013-11-27 | 天津商业大学 | Screw compressor refrigeration cycle system with two-stage economizers |
| CN106403336A (en) * | 2016-11-02 | 2017-02-15 | 广州欧亚制冷设备制造有限公司 | Screw type ultralow temperature one-machine two-stage unit system and control method |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20150826 |
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| EXPY | Termination of patent right or utility model |