CN205918597U - Helical -lobe compressor has level can transfer control system - Google Patents
Helical -lobe compressor has level can transfer control system Download PDFInfo
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- CN205918597U CN205918597U CN201620811295.5U CN201620811295U CN205918597U CN 205918597 U CN205918597 U CN 205918597U CN 201620811295 U CN201620811295 U CN 201620811295U CN 205918597 U CN205918597 U CN 205918597U
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Abstract
The utility model relates to a helical -lobe compressor has level can transfer control system has made clear that the classification that can transfer is 25%, 50%, 75%, 100%, and the relation that corresponds the solenoid valve is the 25%CR relay, 50%CR relay, 75%CR relay, 100%CR relay. When the compressor was shut down, 25%CR is electrical works then, for start preparation once more. The compressor plays the measured time, and the compressor can be transferred step by step, and the compressor is progressively through 25%, 50%, 75%, 100% process promptly. Every actuation time can be according to nimble regulations the such as operating mode of compressor. Control switch is temperature control switch or pressure control switch for the action of CR relay during compressor normal operating. Starting procedure and operation in -process, the action of relay does not influence each other, gets into running state promptly behind the proceed -to -send.
Description
Technical field
This utility model is related to a kind of compressor control system, and specifically a kind of helical-lobe compressor has level can regulate and control system system
System.
Background technology
There is level can adjust control system for helical-lobe compressor, the always hot issue of refrigeration industry research, is originally to adopt
Across-the-line starting, the problem mainly brought is that compressor probably starts at full capacity, and starting current is quite big, and it is right to cause
The impact of electrical network.In recent years, through theoretical research, employ no-load starting, that is, during compressor start, 25% can adjust with operation
For a period of time, I is proved by test for this theoretical research at department, in the case that orderly closedown is restarted, unloads
The dynamic impact that can reduce starting current, reduce to electrical network；If running into fault or in the case that emergent shutdown restarts, unload
The dynamic effect not playing obvious reduction starting current, because while 25%cr3 relay work in theory, but last time is improper
Shut down relay to be likely to be under higher load condition, do not return to 25% state although 25% cr3 relay works, but compression
Machine slide block action to 25% state it is still necessary to a period of time, thus when starting, actual for high load capacity starting.
Comprehensive present research, compressor does not effectively accomplish that underload starts, and does not in addition accomplish adjust step by step yet,
High load capacity is caused to start, the state of direct heavy-duty service, it is likely to result in the abrasion of compressor slide block it is also possible to cause to compress
Machine is to oily phenomenon, the service life of impact compressor.
Content of the invention
It is not enough that this utility model is directed to prior art, there is provided a kind of reduction starting current, reduces and electrical network is impacted, improve
The helical-lobe compressor of electric power system stability and compressor service life has level can adjust control system.
This utility model is achieved through the following technical solutions: a kind of helical-lobe compressor has level can adjust control system, its
It is characterised by: include ac power supply, 25%cr relay, 50%cr relay, 75%cr relay, 100%cr relay, compressor fortune
Row contact, compressor operating normally open contact, compressor operating normally closed interlock, three time relays, energization delay relay, arteries and veins
Rush the time relay and two controlling switches, ac positive source is through compressor operation normally open contact and nine tunnels circuit parallel with one another
Connect ac power cathode, the first circuit is provided with energization delay relay, and second circuit is provided with impulse timer, the 3rd
Circuit is provided with the compressor operating contact being sequentially connected in series and very first time relay, and the 4th circuit is provided with being sequentially connected in series
Two time relays and the normally opened time delay contact of very first time relay first, the 5th circuit is provided with the 3rd time being sequentially connected in series
Relay and second time relay normally opened time delay contact, it is normally closed that the 6th circuit is provided with the very first time relay being sequentially connected in series
Time delay contact, the instantaneous contact of very first time relay and 25%cr relay, also go here and there between ac positive source and 25%cr relay
It is connected to the compressor operating in parallel with very first time relay normally closed time delay contact, the instantaneous contact of very first time relay normally closed tactile
Head, the 7th circuit is provided with second time relay normally closed time delay contact, the instantaneous contact of second time relay, 50%cr relay
Device, the first controlling switch and the normally opened time delay contact of energization delay relay first, second time relay normally closed time delay contact and
After the instantaneous contact of second time relay, the first controlling switch and the normally opened time delay contact of energization delay relay first are connected two-by-two
Parallel connection concatenates 50%cr relay again, and the 8th circuit is provided with the normally closed time delay contact of the 3rd time relay, the 3rd time relay
Instantaneous contact, 75%cr relay, the second controlling switch and the normally opened time delay contact of energization delay relay second, the 3rd time continued
Electrical equipment normally closed time delay contact and the instantaneous contact of the 3rd time relay, the second controlling switch and energization delay relay second are normally opened
Parallel connection after time delay contact is connected two-by-two concatenates 75%cr relay again, and the 9th circuit is provided with the burst length relay being sequentially connected in series
Device normally opened time delay contact and 100%cr relay.
Further, described controlling switch is temp control switch or pressure control switch.
Yet further, described 25%cr relay, in parallel on 50%cr relay, 75%cr relay, 100%cr relay
There is display lamp.
Helical-lobe compressor has level can adjust control system, specify that that can adjust is categorized as 25%, 50%, 75%, 100%, corresponding electricity
The relation of magnet valve is 25%cr relay, 50%cr relay, 75%cr relay, 100%cr relay.During compressor shutdown, 25%
Cr relay works, for preparation of starting shooting again.During compressor start, compressor can be adjusted step by step, that is, compressor be staged through 25%,
50%th, 75%, 100% process.Every relay actuation time can be according to flexible such as the operating modes of compressor.Controlling switch is
Temp control switch or pressure control switch, the action of cr relay when normally running for compressor.Starting process and operation
During, the action of relay is independent of each other, and enters running status after proceed-to-send.
During compressor shutdown, 25%cr relay works, for preparation of starting shooting again.It is embodied as compressor operating normally closed
Before contact is series at 25%cr relay, when compressor stops, 25%cr relay works, and slide block slides into 25% position, for opening again
Machine is prepared.
After compressor start, 25%cr relay continuous firing for a period of time, reduces starting current.Specific embodiments are
Before compressor operating contact is series at very first time relay, the normally closed time delay of very first time relay, instantaneous contact are series at
Before 25%cr relay, 25%cr relay works, and when very first time relay reaches setting value, cuts off its normally closed time delay contact,
25%cr relay disconnects.
During compressor start, can adjust step by step, that is, compressor is staged through 25%, 50%, 75%, 100% process；Every relay
Movement time can be according to flexible such as the operating modes of compressor.Specific implementation process is for during compressor operating contact series connection first
Between relay, after compressor operating contact action, very first time relay obtains electric and starts timing, and 25%cr relay works；
When the very first time, relay reached setting value, second time relay starts timing, the normally closed time delay of second time relay,
Before instantaneous contact is series at 50%cr relay, 50%cr relay works；When second time relay reaches setting value, cut off it
Normally closed time delay contact, 50%cr relay disconnects, and the normally opened time delay contact of second time relay obtains electric simultaneously, and the 3rd time continued
Electrical equipment starts timing, before the normally closed time delay of the 3rd time relay, instantaneous contact are series at 75%cr relay, 75%cr relay
Work；When the 3rd time relay reaches setting value, cut off its normally closed time delay contact, 75%cr relay disconnects；Compressor operating
Before normally open contact is series at impulse timer, impulse timer is the batch (-type) time relay, and contact is series at
100%cr relay.
In starting process and running, the action of relay is independent of each other, and enters running status after proceed-to-send.Tool
Body embodiment is series at before energization delay relay for compressor operating normally open contact, and the setting value of energization delay relay is big
In first, second and third time relay setting value summation.
Control system of the present utility model greatly reduces starting current, reduces the impact to electrical network, improves on ship
The stability of electric power system, improves the service life of compressor simultaneously.
Brief description
Fig. 1 is this utility model electric operation control circuit figure.
In figure: control power supply ac220v, 25%cr relay 3yv, 50%cr relay 2yv, 75%cr relay 1yv, 100%
Cr relay 4yv, display lamp yl, compressor operating contact k9, the first controlling switch k10, the second controlling switch k11, compressor
Operation normally open contact 1km1, compressor operating normally closed interlock 1km2, energization delay relay 3kt, impulse timer 2kt,
Very first time relay kt1, the second time relay kt2, the 3rd time relay kt3, energization delay relay first is normally opened
Time delay contact 3kt1, the normally opened time delay contact 3kt2 of energization delay relay second, impulse timer normally opened time delay contact
2kt1, very first time relay normally open time delay contact kt11, very first time relay normally closed time delay contact kt12, the very first time continues
Electrical equipment instantaneous contact kt13, second time relay normally opened time delay contact kt21, second time relay normally closed time delay contact
Kt22, second time relay instantaneous contact kt23, the 3rd time relay normally closed time delay contact kt31, the 3rd time relay
Instantaneous contact kt32.
Specific embodiment
It is described further below in conjunction with drawings and Examples.
Shown in Fig. 1: a kind of helical-lobe compressor has level that control system can be adjusted to include controlling power supply ac220v, 25%cr relay
3yv, 50%cr relay 2yv, 75%cr relay 1yv, 100%cr relay 4yv, display lamp yl, compressor operating contact k9,
First controlling switch k10, the second controlling switch k11, compressor operating normally open contact 1km1, compressor operating normally closed interlock
1km2, energization delay relay 3kt, impulse timer 2kt, very first time relay kt1, the second time relay kt2,
3rd time relay kt3, the normally opened time delay contact 3kt1 of energization delay relay first, energization delay relay second is normally opened prolongs
When contact 3kt2, impulse timer normally opened time delay contact 2kt1, very first time relay normally open time delay contact kt11, first
The time relay normally closed time delay contact kt12, very first time relay instantaneous contact kt13, the normally opened time delay of second time relay
Contact kt21, second time relay normally closed time delay contact kt22, second time relay instantaneous contact kt23, the 3rd time continue
The electrical equipment normally closed time delay contact kt31 and instantaneous contact kt32 of the 3rd time relay.Power supply ac220v positive pole is controlled to transport through compressor
Row normally open contact 1km1 and nine tunnels circuit parallel with one another connects and controls power supply ac220v negative pole, and the first circuit is provided with energising and prolongs
When relay 3kt, second circuit is provided with impulse timer 2kt, and tertiary circuit is provided with the compressor fortune being sequentially connected in series
Row contact k9 and very first time relay kt1, when the 4th circuit is provided with the second time relay kt2 and first being sequentially connected in series
Between the normally opened time delay contact kt11 of relay first, the 5th circuit is provided with the 3rd time relay kt3 and second being sequentially connected in series
The time relay normally opened time delay contact kt21, the 6th circuit is provided with the very first time relay normally closed time delay contact being sequentially connected in series
Kt12, very first time relay instantaneous contact kt13 and 25%cr relay, also go here and there between ac positive source and 25%cr relay
It is connected to the compressor operating in parallel with very first time relay normally closed time delay contact, the instantaneous contact of very first time relay normally closed tactile
Head 1km2, the 7th circuit is provided with second time relay normally closed time delay contact kt22, the instantaneous contact of second time relay
Kt23,50%cr relay, the first controlling switch k10 and the normally opened time delay contact 3kt1 of energization delay relay first, the second time
Relay normally closed time delay contact and the instantaneous contact of second time relay, the first controlling switch and energization delay relay first are normal
Open parallel connection after time delay contact is connected two-by-two and concatenate 50%cr relay again, the 8th circuit is provided with that the 3rd time relay is normally closed to be prolonged
When contact kt31, the 3rd time relay instantaneous contact kt32,75%cr relay, the second controlling switch k11 and on-delay continue
The normally opened time delay contact kt32 of electrical equipment second, the normally closed time delay contact of the 3rd time relay and the instantaneous contact of the 3rd time relay,
Parallel connection after second controlling switch and the normally opened time delay contact of energization delay relay second are connected two-by-two concatenates 75%cr relay again,
9th circuit is provided with the impulse timer being sequentially connected in series normally opened time delay contact and 100%cr relay.Controlling switch is temperature
Degree controlling switch or pressure control switch.25%cr relay, on 50%cr relay, 75%cr relay, 100%cr relay simultaneously
It is associated with display lamp yl.
Start: compressor coil obtains electric, probe of contactor 1km1 adhesive, time relay 2kt, 3kt, kt1 coil obtain electric,
25%cr relay 3yv works, simultaneously impulse timer 2kt work, and the intermittent time is 10s/10s；After 1 minute (adjustable)
Kt12 time delay contact disconnect, 25%cr relay 3yv dead electricity, time relay kt2 obtain electric, simultaneously 50%cr relay 2yv obtain electric
Work, display lamp 13hl is bright；3 minutes (adjustable) kt22 time delay contact disconnects afterwards, 50%cr relay 2yv dead electricity, display lamp 13hl
Go out, time relay kt3 obtains electric simultaneously, and 75%cr relay 1 yv obtains electric work, and display lamp 12hl is bright；After 3 minutes (adjustable)
Kt31 time delay contact disconnects, 75%cr relay 1yv dead electricity；Subsequently unit enters 100% and can adjust state；After 7 minutes (adjustable),
3kt time relay time delay head obtains electric, and unit can be adjusted according to temperature controller or pressure controller k10, k11 action and work,
If k11 closes, 75%cr relay 1yv obtains electric work；If k10 closes, 50%cr relay 2yv obtains electric work.
Shutdown: shutdown is offloaded to step by step according to refrigeration capacity requirement and system temperature or pressure k10, k11, that is, refrigerating capacity from
100% gradually arrives shutdown again to 25%；After shutdown, compressor normally closed interlock 1km2 connects, and 25%cr relay 3yv remains
Electricity work.
Claims (3)
1. a kind of helical-lobe compressor have level can adjust control system it is characterised in that: include ac power supply, 25%cr relay, 50%cr
Relay, 75%cr relay, 100%cr relay, compressor operating contact, compressor operating normally open contact, compressor operating
Normally closed interlock, three time relays, energization delay relay, impulse timer and two controlling switches, ac power supply is just
Pole connects ac power cathode through compressor operation normally open contact and nine tunnels circuit parallel with one another, and the first circuit is provided with energising and prolongs
When relay, second circuit is provided with impulse timer, and tertiary circuit is provided with the compressor operating contact being sequentially connected in series
With very first time relay, the 4th circuit is provided with second time relay being sequentially connected in series and very first time relay first is normal
Open time delay contact, the 5th circuit is provided with the 3rd time relay being sequentially connected in series and the normally opened time delay of second time relay is touched
Head, the 6th circuit is provided with the very first time relay normally closed time delay contact being sequentially connected in series, the instantaneous contact of very first time relay
With 25%cr relay, also it is serially connected with the normally closed time delay with very first time relay between ac positive source and 25%cr relay and touches
Head, the instantaneous contact of very first time relay compressor operating normally closed interlock in parallel, the 7th circuit is provided with the second time relay
Device normally closed time delay contact, the instantaneous contact of second time relay, 50%cr relay, the first controlling switch and on-delay relay
The normally opened time delay contact of device first, second time relay normally closed time delay contact and the instantaneous contact of second time relay, the first control
Parallel connection after system switch is connected two-by-two with the normally opened time delay contact of energization delay relay first concatenates 50%cr relay, the 8th electricity again
Road is provided with the normally closed time delay contact of the 3rd time relay, the instantaneous contact of the 3rd time relay, 75%cr relay, the second control
System switch and the normally opened time delay contact of energization delay relay second, the normally closed time delay contact of the 3rd time relay and the 3rd time continue
Parallel connection after the instantaneous contact of electrical equipment, the second controlling switch and the normally opened time delay contact of energization delay relay second are connected two-by-two concatenates again
75%cr relay, the 9th circuit is provided with the impulse timer being sequentially connected in series normally opened time delay contact and 100%cr relay.
2. a kind of helical-lobe compressor according to claim 1 has level can adjust control system, it is characterized in that: described controlling switch
For temp control switch or pressure control switch.
3. a kind of helical-lobe compressor according to claim 1 has level can adjust control system, it is characterized in that: described 25%cr continues
Electrical equipment, 50%cr relay, 75%cr relay, 100%cr relay are parallel with display lamp.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2015209774169 | 2015-12-01 | ||
| CN201520977416 | 2015-12-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205918597U true CN205918597U (en) | 2017-02-01 |
Family
ID=57873655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620811295.5U Withdrawn - After Issue CN205918597U (en) | 2015-12-01 | 2016-07-29 | Helical -lobe compressor has level can transfer control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205918597U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386976A (en) * | 2015-12-01 | 2016-03-09 | 江苏兆胜空调有限公司 | Stepped energy adjustment control system of screw compressor |
-
2016
- 2016-07-29 CN CN201620811295.5U patent/CN205918597U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386976A (en) * | 2015-12-01 | 2016-03-09 | 江苏兆胜空调有限公司 | Stepped energy adjustment control system of screw compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170201 Effective date of abandoning: 20171114 |
|
| AV01 | Patent right actively abandoned |