CN207849810U - A kind of multi-parallel screw low-temperature handpiece Water Chilling Units of direct-expansion type feed flow - Google Patents
A kind of multi-parallel screw low-temperature handpiece Water Chilling Units of direct-expansion type feed flow Download PDFInfo
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- CN207849810U CN207849810U CN201820236148.9U CN201820236148U CN207849810U CN 207849810 U CN207849810 U CN 207849810U CN 201820236148 U CN201820236148 U CN 201820236148U CN 207849810 U CN207849810 U CN 207849810U
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Abstract
The utility model discloses a kind of multi-parallel screw low-temperature handpiece Water Chilling Units of direct-expansion type feed flow, and unit is by exhaust condensation module, economizer module, evaporation module, return-air module and the closed refrigerant circulation circuit of oil circuit module composition and oil circulation circuit；Wherein economizer module is single economizer list expansion valve, and unit is at low cost；Evaporation module setting divides gas tank, refrigerant steam after separating, throttling expansion to ensure that evaporator inlet liquid separation is uniform, improve unit efficiency.Surge tank is arranged in the return-air module of the utility model, in the risk for ensureing to reduce machine string formation while unit oil return and leaking, improves unit operation reliability.
Description
Technical field
The utility model belongs to art of refrigeration units, low more specifically to a kind of multi-parallel screw rod of direct-expansion type feed flow
Warm handpiece Water Chilling Units field.
Background technology
In recent years, refrigeration industry develops rapidly, and handpiece Water Chilling Units especially screw water cooling machine set market proportion increases increasingly.From
From the point of view of products characteristics, screw water cooling machine set is extremely strong to the adaptability of project, and civilian, business, industry can be used, also can be with other
Type Unit Combination uses.From the point of view of application range, high temperature, medium temperature, low temperature multi-state has may be implemented in screw water cooling machine set
It uses.In the prior art, the multi-parallel screw low-temperature handpiece Water Chilling Units of low-temperature cold water unit especially direct-expansion type feed flow are still deposited
In some shortcomings.
The first, economizer module is complicated, and manufacturing cost is high.
Multi-parallel screw low-temperature handpiece Water Chilling Units are usually arranged to improve compressor operating efficiency, reducing compressor exhaust temperature
Economizer module.Existing way：First, more more economizer auxiliaries of economizer, the i.e. number of economizer are kept with compressor number of units
Unanimously, cause machine set compressor parallel connection number more, auxiliary such as heating power expansion valve, economizer electromagnetism in economizer and economic device assembly
The quantity such as valve increase, and then increase unit cost.Second is that the more economizer auxiliaries of single economizer, i.e. economizer quantity is always one
A, attachment such as heating power expansion valve, economizer solenoid valve quantity are determined according to compressor number of units in economizer auxiliary, economizer return-air
If return-air manifold, multichannel is divided to return compressor economizer mouth by return-air manifold, economizer quantity is one, but economizer auxiliary number
Amount is more equally to improve unit cost.Third, single economizer list economizer auxiliary, when freezer load reduction, compressor energy adjustment
Start to unload, since load variations cannot be reacted to economizer circuit in time, the economizer return-air manifold degrees of superheat do not change in time,
Expansion valve does not make adjusting yet, is easy to cause compressor and returns liquid.
The second, evaporator heat transfer efficiency still can be improved.
For handpiece Water Chilling Units evaporator mostly based on dry evaporator, expansion valve is arranged in evaporator.The expanded valve section of refrigerant
It will produce part refrigerant steam after stream, liquid separation unevenness be easy to cause when entering dry evaporator, evaporator heat exchange area cannot
It efficiently uses.
The limitation of third, technical matters condition, condenser, evaporator can not avoid leakage problem.
Handpiece Water Chilling Units are to reduce risk of leakage, usually all gas-liquid separator can be arranged in return-air.In actual motion, work as unit
When leaking, water or refrigerating medium often can be all found inside compressor.On the one hand another since gas-liquid separator volume is inadequate
Aspect gas-liquid separator return-air bottom of the tube can design oil return hole, and deposition is sucked when this hole also causes unit to leak while oil return
Water or refrigerating medium in bottom.
Utility model content
The utility model is to provide that a kind of production cost is low, the energy is sharp to avoid above-mentioned deficiency of the prior art
With the multi-parallel screw low-temperature handpiece Water Chilling Units of rate height, the high direct-expansion type feed flow of reliability.
The utility model adopts the following technical scheme that solve above-mentioned technical problem：
The multi-parallel screw low-temperature handpiece Water Chilling Units of the utility model direct-expansion type feed flow are structurally characterized in that：The unit is by arranging
Gas condensation module, economizer module, evaporation module, return-air module and the closed refrigerant circulation circuit of oil circuit module composition and oil circuit
Circulation loop；
The exhaust condensation module by refrigerant flow to from the outlet of compressor set gradually for：It is compressor, oil eliminator, cold
Condenser, filter vat and liquid-sighting glass, the compressor is the two or more helical-lobe compressors parallel connection determined frequency band and can adjusted, described
Condenser is using water cooling, the condensing mode that air-cooled or evaporation is cold；
Economizer module major loop containing refrigerant and refrigerant branch-path, the refrigerant major loop are considered oneself as by refrigerant flow direction
The outlet of liquid mirror set gradually for：Inlet tube ball valve, the side-entrance of economizer high pressure, economizer, economizer high pressure side outlet and go out
Liquid pipe ball valve；The refrigerant branch-path drawn from the outlet of inlet tube ball valve and by refrigerant flow direction set gradually for：Branch regards
Liquid mirror, economizer branch way solenoid valve, electric expansion valve, the side-entrance of economizer low pressure, economizer, economizer low side outlets and in
Push back gas manifold, in medium pressure return-air manifold refrigerant pushed back in the form of in parallel and in passing through successively gas branch check valve and
In push back the economizer interface that gas branch ball valve accesses each compressor；
The economizer is plate heat exchanger or shell-and-tube heat exchanger, refrigerant and electronic expansion in the refrigerant major loop
The refrigerant in refrigerant branch-path after valve throttling exchanges heat in economizer, so that main refrigerant circuit is subcooled, branch refrigerant evaporation；
The evaporation module is connected by general piping for liquids with the outlet tube ball valve of economizer module, and the evaporation module is by cold
Matchmaker flow direction set gradually from the outlet of outlet tube ball valve for：Manifold solenoid valves, divide gas tank inlet tube, divide gas heating power expansion valve
Tank divides gas tank outlet tube, dry evaporator and evaporator muffler, divides gas tank separation after heating power expansion valve throttles using described
The cold media gas carried secretly in refrigerant liquid, liquid enter dry evaporator through excessive gas tank outlet tube, and gas goes out through excessive gas tank
Tracheae enters evaporator muffler；
The return-air module connects evaporator muffler by surge tank inlet tube, and it is total that surge tank outlet connects return-air
Pipe, utilizes the refrigerant liquid carried secretly in surge tank separating evaporator muffler refrigerant；It is respectively set in the bottom of the surge tank
Surge tank bottom bypass pipe, heat exchanger tube and surge tank liquid-sighting glass, the surge tank bottom bypass pipe connects low pressure bypass pipe, and passes through
Low pressure bypass solenoid valve accesses return-air manifold；
The oil circuit module is divided into refrigeration oil master using refrigeration oil in oil eliminator separation refrigerant, the refrigeration oil by flow direction
Circuit and refrigeration oil bypass circulation；The refrigeration oil major loop by oil circuit flow to from oil eliminator oil outlet set gradually for：Oil
Separator flowline, the import of buffering pot bottom heat exchanger tube, buffering pot bottom heat exchanger tube, buffering pot bottom heat transfer tube outlet to oil cooling
But device oil inlet pipe；The refrigeration oil is in buffering pot bottom heat exchanger tube and is deposited on the refrigerant liquid heat exchange for buffering pot bottom, makes
The freezing oil temperature reduces, refrigerant liquid evaporation；The refrigeration oil bypass circulation is that oil eliminator flowline is drawn all the way
Bleed off circuit, and oil cooler oil inlet pipe is accessed, oil circuit bypass solenoid valve is set on the bleed off circuit.
The design feature of the multi-parallel screw low-temperature handpiece Water Chilling Units of the utility model direct-expansion type feed flow is lain also in：Described in setting
The inlet height for dividing the tank body height of gas tank to be higher than dry evaporator, makes refrigerant liquid overcome in dry evaporator heat exchanger tube
Flow resistance.
The design feature of the multi-parallel screw low-temperature handpiece Water Chilling Units of the utility model direct-expansion type feed flow is lain also in：Described slow
High level switch and low liquid level switch is respectively set in the side wall for rushing tank, and the high level switch is in the top of low liquid level switch.
The design feature of the multi-parallel screw low-temperature handpiece Water Chilling Units of the utility model direct-expansion type feed flow is lain also in：The oil is other
Three-way electromagnetic valve is controlled according to the temperature signal of oil cooler oil inlet pipe so that freezes oil temperature in oil cooler oil inlet pipe
When less than setting value, oil bypass solenoid valve is opened, conversely, oil bypass solenoid valve remains closing.
Compared with the prior art, the utility model has the beneficial effect that：
1, economizer module is using single economizer single electron expansion valve in the utility model, and production cost is low, occupied space
It is small, it is suitable for enlarged multi-parallel low-temperature cold water unit.
2, electric expansion valve is become by pushing back the gas manifold degrees of superheat and compression function tune section in economizer in the utility model
Change co- controlling, solve due to electronic expansion valve opening change delay caused by unit energy modulation, reduces compressor and return
The risk of liquid.
3, module setting is evaporated in the utility model and divides gas tank, isolates the refrigerant steam and refrigerant after expanded valve throttling
Liquid, it is refrigerant liquid to ensure evaporator all, so that liquid separation in evaporator is more uniformly distributed, heat exchange area is utilized effectively.
4, return-air module is surge tank in the utility model, and compressor is controlled by the high level switch installed on surge tank
Alarm, which is shut down, effectively reduces danger of leaking out in handpiece Water Chilling Units evaporator, and buffering pot bottom is drawn all the way, and low pressure bypass solenoid valve is arranged,
Low pressure bypass solenoid valve, by the button control start-stop on configuration interface, not only makes unit according to low liquid level switch and liquid-sighting glass state
Can normal oil return, also solve evaporator it is a small amount of in leakage when bypass sucking refrigerating medium hidden danger.
5, in the utility model oil eliminator detach high temperature refrigeration oil by buffer pot bottom heat exchanger tube be deposited on it is slow
Rush the liquid heat exchange of pot bottom.High temperature freezes oil temperature and reduces, and refrigerant evaporates in surge tank bottom liquid, effectively increases machine
Group efficiency.Oil circuit is arranged bypass and according to the folding of oil cooler inlet tube Oil-temperature control oil bypass solenoid valve, avoids pressure
The too low risk of contracting machine returning-oil temperature.
Description of the drawings
Fig. 1 is Tthe utility model system structural schematic diagram；
Fig. 2 is economizer interface diagram in Tthe utility model system；
Fig. 3 is to divide gas tank interface diagram in Tthe utility model system；
Fig. 4 is buffer tank structure schematic diagram in Tthe utility model system；
Figure label：1 compressor, 2 oil eliminators, 3 condensers, 4 filter vats, 5 liquid-sighting glass, 6 inlet tube ball valves, 7 is economical
Device, 71 economizer high pressure side-entrances, 72 economizer high pressure side outlets, 73 economizer low pressure side-entrances, 74 economizer low-pressure sides go out
Mouthful, 8 branch liquid-sighting glass, 9 economizer branch way solenoid valves, 10 electric expansion valves, 11 outlet tube ball valves, 12 manifold solenoid valves, 13 heat
Power expansion valve, 14 points of gas tanks, 141 points of gas tank inlet tubes, 142 points of gas tank outlet tubes, 143 points of gas tank escape pipes, the evaporation of 15 dry types
Device, 16 surge tanks, 161 surge tank liquid-sighting glass, 162 heat exchanger tubes, 163 high level switches, 164 low liquid levels switch, 165 surge tanks into
Mouth pipe, 166 surge tank outlets, 167 surge tank bottom bypass pipes, 168 buffering pot bottom heat exchanger tube imports, 169 surge tank bottoms
Portion's heat transfer tube outlet, 17 oil bypass solenoid valves push back gas branch check valve in 18, push back gas branch ball valve in 19, by 20 low pressure
Three-way electromagnetic valve, pushes back gas manifold in 21,22 general piping for liquids, 23 evaporator mufflers, 24 return-air manifold, 25 low pressure bypass pipes, and 26
Oil cooler oil inlet pipe, 27 bleed off circuits, 28 oil eliminator flowlines.
Specific implementation mode
Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, in the present embodiment the multi-parallel screw low-temperature handpiece Water Chilling Units of direct-expansion type feed flow be by
It is vented condensation module, economizer module, evaporation module, return-air module and the closed refrigerant circulation circuit of oil circuit module composition and oil
Road circulation loop.
Exhaust condensation module by refrigerant flow to from compressor 1 outlet set gradually for：Compressor 1, oil eliminator 2, condensation
Device 3, filter vat 4 and liquid-sighting glass 5, compressor 1 are the two or more helical-lobe compressors parallel connection determined frequency band and can adjusted, condenser
3 using water cooling, the condensing mode that air-cooled or evaporation is cold.
Economizer module major loop containing refrigerant and refrigerant branch-path, refrigerant major loop are flowed to by refrigerant from liquid-sighting glass 5
Outlet set gradually for：Inlet tube ball valve 6, economizer high pressure side-entrance 71, economizer 7, economizer high pressure side outlet 72 and go out
Liquid pipe ball valve 11；Refrigerant branch-path drawn from the outlet of inlet tube ball valve 6 and by refrigerant flow direction set gradually for：Branch regards
Liquid mirror 8, economizer branch way solenoid valve 9, electric expansion valve 10, economizer low pressure side-entrance 73, economizer 7, economizer low-pressure side
Outlet 74 and in push back gas manifold 21, in push back in gas manifold 21 refrigerant and push back gas branch in the form of in parallel and in passing through successively
Road check valve 18 pushes back the economizer interface that gas branch ball valve 19 accesses each compressor in；Economizer 7 be plate heat exchanger or
Shell-and-tube heat exchanger, the refrigerant in refrigerant major loop throttle with electric expansion valve 10 after refrigerant branch-path in refrigerant passing through
It exchanges heat in Ji device 7, so that main refrigerant circuit is subcooled, branch refrigerant evaporation.
Evaporation module is connected by general piping for liquids 22 with the outlet tube ball valve 11 of economizer module, and evaporation module presses refrigerant stream
To set gradually from the outlet of outlet tube ball valve 11 for：Manifold solenoid valves 12, heating power expansion valve 13, divide gas tank inlet tube 141,
Divide gas tank 14, divide gas tank outlet tube 142, dry evaporator 15 and evaporator muffler 23, what is utilized divides gas tank 14 to detach through heat
The cold media gas carried secretly in refrigerant liquid after power expansion valve 13 throttles, liquid enter dry type through excessive gas tank outlet tube 142 and evaporate
Device 15, gas enter evaporator muffler 23 through excessive gas tank escape pipe 143.
Return-air module connects evaporator muffler 23 by surge tank inlet tube 165, and surge tank outlet 166 connects return-air
Manifold 24 utilizes the refrigerant liquid carried secretly in 16 separating evaporator muffler of surge tank, 23 refrigerant；In the bottom of surge tank 16 point
Not She Zhi surge tank bottom bypass pipe 167, heat exchanger tube 162 and surge tank liquid-sighting glass 161, surge tank bottom bypass pipe 167 connect
Low pressure bypass pipe 25, and access return-air manifold 24 through low pressure bypass solenoid valve 20.
Oil circuit module using oil eliminator 2 detach refrigerant in refrigeration oil, refrigeration oil by flow direction be divided into refrigeration oil major loop and
Refrigeration oil bypass circulation；Refrigeration oil major loop by oil circuit flow to from 2 oil outlet of oil eliminator set gradually for：Oil eliminator is fuel-displaced
Pipe 28, buffering pot bottom heat exchanger tube import 168, buffering pot bottom heat exchanger tube 162, buffering pot bottom heat transfer tube outlet 169 to oil
Cooler oil inlet pipe 26；Refrigeration oil in buffering pot bottom heat exchanger tube 162 be deposited on buffering pot bottom refrigerant liquid heat exchange,
Make the reduction of freezing oil temperature, refrigerant liquid evaporation；Refrigeration oil bypass circulation is the bypass all the way that oil eliminator flowline 28 is drawn
Oil circuit 27, and oil cooler oil inlet pipe 26 is accessed, oil circuit bypass solenoid valve 17 is set on bleed off circuit 27.
Module is evaporated in the present embodiment using single economizer list economizer auxiliary, compared with the more economizer auxiliaries of more economizers
Reduce unit cost.
The aperture that electric expansion valve 10 is arranged in the present embodiment is that the overheat of cold media gas in gas manifold 21 is pushed back in
The energy modulationization of degree and running compressor controls as follows：
Refrigerant temperature T31 in gas manifold 21 is pushed back in being obtained by temperature sensor detection, and unit is DEG C, by low pressure sensor
Detection pushes back the pressure of refrigerant in gas manifold 21 in obtaining, refrigerant pressure in gas manifold 21 is pushed back in, is handled by controller
Obtain corresponding refrigerant saturation temperature T32, unit is DEG C that it is T0 that the refrigerant degree of superheat in gas manifold 21 is pushed back in setting, and unit is
℃。
If T31-T32>T0 then increases the aperture of electric expansion valve 10, until when T31=T32, electric expansion valve 10 stops
Action；If T31-T32<T0 then reduces the aperture of electric expansion valve 10, until when T31=T32, electric expansion valve 10 stops dynamic
Make.
The current aperture preset value of electric expansion valve 10 is set as S1, and the aperture preset value after electric expansion valve 10 changes is set as
S2, multi-parallel screw low-temperature handpiece Water Chilling Units it is current state can be adjusted to be set as R1%, state can be adjusted to be set as R2% after variation, judged
The operating status of the multi-parallel screw low-temperature handpiece Water Chilling Units of direct-expansion type：If stress state, the aperture of electric expansion valve 10 is default
It is worth constant, i.e. S2=S1；If unloaded state, aperture preset value S2=R2/R1 × S1 of electric expansion valve 10.
Such as：It is 5 DEG C that the refrigerant degree of superheat in gas manifold 21 is pushed back in setting, which is T0, in push back refrigerant pressure in gas manifold 21
It is 2 DEG C for 0.53MPa, corresponding refrigerant saturation temperature T32, if T31 is 8 DEG C, increases the aperture of electric expansion valve 10, until
When T31=T32,10 stopping of electric expansion valve action；If T31 is 5 DEG C, reduce the aperture of electric expansion valve 10, until T31=
When T32,10 stopping of electric expansion valve action.
The current aperture preset value of electric expansion valve 10 is set as 2000 steps, the aperture preset value after the variation of electric expansion valve 10
Be set as S2, multi-parallel screw low-temperature handpiece Water Chilling Units it is current state can be adjusted to be set as 100%, state can be adjusted to be set as after variation
50%, judge the operating status of the multi-parallel screw low-temperature handpiece Water Chilling Units of direct-expansion type：If stress state, electric expansion valve 10
Aperture preset value is constant, i.e. S2=S1=2000；If unloaded state, the aperture preset value S2=100/50 of electric expansion valve 10
× 2000=1000.
As shown in figure 3, in the present embodiment, divide gas tank 14 need to be according to effective in dry evaporator in safety time 15 by volume
The volume of liquid calculates, and divides gas tank air inlet pipe 141 to be located at and divides gas tank side wall upper part and away from dividing the gas tank escape pipe 143 1 spacing
From to ensure that refrigerant liquid and cold media gas efficiently separate.Dividing gas tank outlet tube 142 to be located at divides gas tank bottom to ensure feed flow.
Setting divides the inlet height that the tank body height of gas tank 14 is higher than dry evaporator 15 in the present embodiment, makes refrigerant liquid
Overcome the flow resistance in 15 heat exchanger tube of dry evaporator, divide the import of gas tank 14 and dry evaporator 15 there are difference in height,
On the one hand, evaporator heat transfer efficiency can be improved；On the other hand, it can prevent refrigerant directly by dividing gas tank escape pipe 143 to go here and there out.
As shown in figure 4, refrigerant enters surge tank 16 in evaporator muffler 23 in the present embodiment, is turned to and flowed using refrigerant
The cold media gas carried secretly in refrigerant is isolated in speed variation, and high level switch 163 and low liquid is respectively set in the side wall of surge tank 16
Bit switch 164, high level switch 163 are in the top of low liquid level switch 164.
Compressor 1 controls as follows according to the liquid level in surge tank 16：If liquid level is high in surge tank 16
In high level switch 163, high liquid level warning signal is exported to controller using high level switch 163, is exported and is compressed by controller
Machine alarm stopping signal, makes the alarm of compressor 1 shut down.
Surge tank 16 isolates cooling medium liquid cognition and carries the refrigeration oil being dissolved in refrigerant liquid in the present embodiment, therefore is arranged other
Three-way electromagnetic valve 20 controls the connection and closing of low pressure bypass pipe 25 according to bypass solenoid valve 20, and then ensures oil return.Bypass electromagnetism
Valve 20 controls as follows according to the state of liquid level and surge tank liquid-sighting glass 161 in surge tank 16：If in surge tank 16
Liquid level is less than low liquid level switch 164, exports low liquid level warning signal to controller using low liquid level switch 164, surge tank regards liquid
The state of mirror 161 is by in-site installation projection device to Central Control Room, and the state of middle control observation surge tank liquid-sighting glass 161 is if dry
It is dry, then open bypass solenoid valve 20；Conversely, it is to close to keep bypass solenoid valve 20 so that 1 normal oil return of compressor.
Oil bypass solenoid valve 17 is controlled according to the temperature signal of oil cooler oil inlet pipe 26 in the present embodiment so that
When freezing oil temperature is less than setting value in oil cooler oil inlet pipe 26, oil bypass solenoid valve 17 is opened, conversely, oil bypass solenoid valve
17 remain closing.If refrigeration oil set temperature is 70 DEG C in oil cooler oil inlet pipe 26, when actual oil temperature is less than 70 DEG C, oil
Bypass solenoid valve 17 is opened, conversely, oil bypass solenoid valve 17 is closed, and then controls compressor returning-oil temperature.
Claims (4)
1. a kind of multi-parallel screw low-temperature handpiece Water Chilling Units of direct-expansion type feed flow, it is characterized in that：The unit by exhaust condensation module,
Economizer module, evaporation module, return-air module and the closed refrigerant circulation circuit of oil circuit module composition and oil circulation circuit；
The exhaust condensation module by refrigerant flow to from the outlet of compressor (1) set gradually for：Compressor (1), oil eliminator
(2), condenser (3), filter vat (4) and liquid-sighting glass (5), the compressor (1) be determine frequency band can adjust it is two or more
Helical-lobe compressor is in parallel, and the condenser (3) is using water cooling, the condensing mode that air-cooled or evaporation is cold；
Economizer module major loop containing refrigerant and refrigerant branch-path, the refrigerant major loop are flowed to by refrigerant from liquid-sighting glass
(5) outlet set gradually for：Inlet tube ball valve (6), economizer high pressure side-entrance (71), economizer (7), economizer high-pressure side
Export (72) and outlet tube ball valve (11)；The refrigerant branch-path draws from the outlet of inlet tube ball valve (6) and presses refrigerant stream
To set gradually for：Branch liquid-sighting glass (8), economizer branch way solenoid valve (9), electric expansion valve (10), economizer low-pressure side into
Mouthful (73), economizer (7), economizer low side outlets (74) and in push back gas manifold (21), medium pressure return-air manifold (21)
Middle refrigerant pushed back in the form of in parallel and in passing through successively gas branch check valve (18) and in push back gas branch ball valve (19) and access
The economizer interface of each compressor；
The economizer (7) is plate heat exchanger or shell-and-tube heat exchanger, refrigerant and electronic expansion in the refrigerant major loop
The heat exchange in economizer (7) of the refrigerant in refrigerant branch-path after valve (10) throttling, makes main refrigerant circuit be subcooled, branch refrigerant
Evaporation；
The evaporation module is connected by general piping for liquids (22) with the outlet tube ball valve (11) of economizer module, the evaporation module
By refrigerant flow direction set gradually from the outlet of outlet tube ball valve (11) for：Manifold solenoid valves (12), divide heating power expansion valve (13)
Gas tank inlet tube (141) divides gas tank (14), divides gas tank outlet tube (142), dry evaporator (15) and evaporator muffler
(23), the cold media gas for dividing gas tank (14) separation to be carried secretly in refrigerant liquid after heating power expansion valve (13) throttling, liquid are utilized
Body enters dry evaporator (15) through excessive gas tank outlet tube (142), and gas enters evaporator through excessive gas tank escape pipe (143)
Muffler (23)；
The return-air module connects evaporator muffler (23) by surge tank inlet tube (165), and surge tank outlet (166) is even
Gas manifold (24) is taken back, the refrigerant liquid carried secretly in surge tank (16) separating evaporator muffler (23) refrigerant is utilized；Described
Surge tank bottom bypass pipe (167), heat exchanger tube (162) and surge tank liquid-sighting glass (161) is respectively set in the bottom of surge tank (16),
Surge tank bottom bypass pipe (167) the connection low pressure bypass pipe (25), and it is total through low pressure bypass solenoid valve (20) access return-air
It manages (24)；
The oil circuit module is divided into refrigeration oil master using refrigeration oil in oil eliminator (2) separation refrigerant, the refrigeration oil by flow direction
Circuit and refrigeration oil bypass circulation；The refrigeration oil major loop by oil circuit flow to from oil eliminator (2) oil outlet set gradually for：
Oil eliminator flowline (28), buffering pot bottom heat exchanger tube import (168), buffering pot bottom heat exchanger tube (162), buffering pot bottom
Heat transfer tube outlet (169) is to oil cooler oil inlet pipe (26)；The refrigeration oil in buffering pot bottom heat exchanger tube (162) with deposition
In the refrigerant liquid heat exchange of buffering pot bottom, the freezing oil temperature is set to reduce, refrigerant liquid evaporation；The freezing oil bypass returns
Road is the bleed off circuit all the way (27) that oil eliminator flowline (28) is drawn, and accesses oil cooler oil inlet pipe (26), described
Oil circuit bypass solenoid valve (17) is set on bleed off circuit (27).
2. the multi-parallel screw low-temperature handpiece Water Chilling Units of direct-expansion type feed flow according to claim 1, it is characterized in that：Setting institute
The tank body height for stating a point gas tank (14) is higher than the inlet height of dry evaporator (15), and refrigerant liquid is made to overcome in dry evaporator
(15) flow resistance in heat exchanger tube.
3. a kind of multi-parallel screw low-temperature handpiece Water Chilling Units of direct-expansion type feed flow according to claim 1, it is characterized in that：
High level switch (163) and low liquid level switch (164), the high level switch is respectively set in the side wall of the surge tank (16)
(163) it is in the top of low liquid level switch (164).
4. the multi-parallel screw low-temperature handpiece Water Chilling Units of direct-expansion type feed flow according to claim 1, it is characterized in that：The oil
Bypass solenoid valve (17) is controlled according to the temperature signal of oil cooler oil inlet pipe (26) so that in oil cooler oil inlet pipe
(26) when freezing oil temperature is less than setting value in, oil bypass solenoid valve (17) is opened, conversely, oil bypass solenoid valve (17) remains
It closes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820236148.9U CN207849810U (en) | 2018-02-09 | 2018-02-09 | A kind of multi-parallel screw low-temperature handpiece Water Chilling Units of direct-expansion type feed flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820236148.9U CN207849810U (en) | 2018-02-09 | 2018-02-09 | A kind of multi-parallel screw low-temperature handpiece Water Chilling Units of direct-expansion type feed flow |
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| CN207849810U true CN207849810U (en) | 2018-09-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108131854A (en) * | 2018-02-09 | 2018-06-08 | 安徽美乐柯制冷空调设备有限公司 | A kind of multi-parallel screw low-temperature handpiece Water Chilling Units of direct-expansion type feed flow |
| CN110682156A (en) * | 2019-09-18 | 2020-01-14 | 珠海格力电器股份有限公司 | Main shaft oil cooling system, main shaft oil temperature control method and machine tool cooling machine system |
-
2018
- 2018-02-09 CN CN201820236148.9U patent/CN207849810U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108131854A (en) * | 2018-02-09 | 2018-06-08 | 安徽美乐柯制冷空调设备有限公司 | A kind of multi-parallel screw low-temperature handpiece Water Chilling Units of direct-expansion type feed flow |
| CN108131854B (en) * | 2018-02-09 | 2023-10-10 | 安徽美乐柯制冷空调设备有限公司 | Direct expansion type liquid supply multi-parallel screw low-temperature water chilling unit |
| CN110682156A (en) * | 2019-09-18 | 2020-01-14 | 珠海格力电器股份有限公司 | Main shaft oil cooling system, main shaft oil temperature control method and machine tool cooling machine system |
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