CN204984821U - Soft starting drive of refrigeration plant and compressor - Google Patents
Soft starting drive of refrigeration plant and compressor Download PDFInfo
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- CN204984821U CN204984821U CN201520539546.4U CN201520539546U CN204984821U CN 204984821 U CN204984821 U CN 204984821U CN 201520539546 U CN201520539546 U CN 201520539546U CN 204984821 U CN204984821 U CN 204984821U
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Abstract
The utility model discloses a soft starting drive of refrigeration plant and compressor. This compressor soft starting drive include: compressor soft starter for generate the first signal when the compressor starts completion and total head operation, otherwise generate the second signal, main control unit, soft starter is connected with the compressor for open compressor gas bypass under the circumstances of closing compressor gas bypass under the first signal's the circumstances and receiving the second signal receiving. The utility model discloses can improve the success rate of heavily loaded compressor soft start, still can improve the voltage control scope of soft starter real work, practice thrift soft starter's lectotype cost, have simple structure, characteristics with low costs.
Description
Technical field
The utility model relates to art of refrigeration units, in particular to a kind of chiller plant and compressor soft starting device.
Background technique
Realize the mode that compressor reduction inrush current makes compressor smoothly start at present, mainly contain and utilize frequency variator startup and soft initiator to start two kinds of modes.Soft initiator general regulating voltage, reduces inrush current, does not change frequency.For the motor not needing speed governing only need control start-up course, soft-start mode is adopted comparatively to adopt frequency variator more cost-saving.
But due to the randomness of compressor shutdown, or again start in the short time, when making compressor start, there is pressure reduction between internal high pressure chamber and low pressure volumes, pressure reduction is larger, and resistance is larger, make compressor by static larger to the torque needed for rotation.Especially for the compressor of heavy duty, because required torque is very large, after adopting soft start, during startup, starting voltage is lower, and the torque provided less (when rotating speed is certain, torque is directly proportional to voltage squared), probably causes and start unsuccessfully.
Therefore, the initial level of torque improving startup only has by improving the setting of soft initiator starting voltage, but too high starting voltage can make the adjustable voltage scope of soft start diminish, inrush current becomes large, and soft start reduces inrush current meaning by reducing voltage weakens.
In addition, start for induced heavy-duty compression machine, inrush current is very large, if use the soft initiator of conveniently load type selecting, can affect the soft initiator life-span.Therefore need lifting parameter specification type selecting, cost improves.
Model utility content
A kind of structure is simple, cost is low, soft start success rate is high, soft start voltage regulation range is large chiller plant and compressor soft starting device are provided in the utility model embodiment.
For solving the problems of the technologies described above, the utility model embodiment provides a kind of compressor soft starting device, comprising: compressor soft initiator, generates the first signal, otherwise generate secondary signal for completing at compressor start when also total head is run; Master controller, is connected with compressor soft initiator, opens compressor gas bypass for the close compressor gas bypass when receiving the first signal when receiving secondary signal.
As preferably, compressor soft initiator comprises the normally opened contact for exporting the first signal or secondary signal; Compressor soft starting device also comprises the first relay, and the control end of the first relay is connected with normally opened contact, and the output terminal of the first relay is connected with master controller.
The utility model additionally provides a kind of chiller plant, comprises above-mentioned compressor soft starting device.
The utility model can improve the success rate of induced heavy-duty compression machine soft start, also can improve the voltage regulation limits of soft initiator real work, has saved the type selecting cost of soft initiator, has the advantages that structure is simple, cost is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of the compressor soft starting device of the utility model embodiment.
Description of reference numerals:
1, compressor soft initiator; 2, master controller; 3, compressor gas bypass; 4, normally opened contact; 5, the first relay; 6, compressor; 7, compressor A.C. contactor.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, but not as to restriction of the present utility model.
Please refer to Fig. 1, the utility model provides a kind of compressor soft starting device, comprising: compressor soft initiator 1, generates the first signal, otherwise generate secondary signal for having started at compressor 6 when also total head is run; Master controller 2, is connected with compressor soft initiator 1, opens compressor gas bypass 3 for the close compressor gas bypass 3 when receiving the first signal when receiving secondary signal.In Fig. 1, L1, L2, L3 represent three-phase firewire, and N represents zero line.
Owing to have employed technique scheme, before compressor 6 starts, compressor gas bypass 3 is in opening state.When machine to be compressed has started also total head operation, master controller 2 can close compressor gas bypass 3.
Like this, in the start-up course of compressor 6, compressor gas bypass 3 is in opening state, balance is to a certain extent obtained with the air pressure of the hyperbaric chamber and low-pressure cavity that make motor, thus reduce the resistance of compressor rotation, and then compressor 6 is reduced from static torque required to start-up course, therefore, compressor soft initiator 1, when arranging lower starting voltage, just can produce enough torques and ensure compressor start success.Meanwhile, compared with not adopting the soft start of compressor gas bypass mode, inrush current of the present utility model can remain on relatively little level.
In addition, the capacity requirement for the power electronic devices in compressor soft initiator also can reduce, thus while extending the life-span, does not need to improve specification and select more jumbo compressor soft initiator.
Visible, the utility model can improve the success rate of induced heavy-duty compression machine soft start, also can improve the voltage regulation limits of soft initiator real work, has saved the type selecting cost of soft initiator, has the advantages that structure is simple, cost is low.
Preferably, compressor soft initiator 1 comprises the normally opened contact 4 for exporting the first signal or secondary signal; The control end that compressor soft starting device also comprises the first relay 5, first relay 5 is connected with normally opened contact 4, and the output terminal of the first relay 5 is connected with master controller 2.Like this, the state of normally opened contact 4, just can pass to master controller 2 by the first relay 5, also just the first signal or secondary signal is sent and gives master controller 2.
Preferably, the default conditions of compressor gas bypass 3 when powering on are opening state.Please refer to Fig. 1, when utensil powers on, master controller 2 receives the starting-up signal of wire controller, the coil of compressor A.C. contactor 7 obtains electric, so major loop make contact, the auxiliary contact of compressor A.C. contactor 7 close simultaneously, start to make compressor soft initiator 1 and start working.So, when through after a period of time, soft start completes, its normally opened contact 4 closes, thus make the coil of the first relay 5 obtain electric, make contact, when master controller 2 detects this signal, just control compressor gas bypass 3 and close, after machine 6 to be compressed normally runs, master controller 2 is close compressor gas bypass 3 again.
Please refer to Fig. 1; when shutting down, the coil losing electricity of compressor A.C. contactor 7, major loop contact disconnects; the auxiliary contact of compressor A.C. contactor 7 disconnect simultaneously; so compressor soft initiator 1 startup quits work, and its normally opened contact returns to off state and its coil losing electricity; therefore; the contact of the first relay disconnects, and when master controller 2 detects this signal, controls compressor gas bypass 3 and opens.Like this, can guarantee before compressor start, compressor gas bypass 3 is in open mode, and the air pressure in the high and low pressure chamber of compressor 6 is balanced, for soft start is ready next time.
Please refer to Fig. 1, compressor A.C. contactor 7 is the ac contactor contact of compressor, and wherein, three-phase loop is main contact, single-phase loop is auxiliary contact, does not draw coil.Master controller 2 can be the master board of air-conditioning or water-heating machine.After compressor adopts soft starting mode, compressor soft initiator 1 itself needs to provide single-phase 220V power supply, for the bypass relay (not drawing in Fig. 1) of compressor soft initiator 1 inside, utilize the normally opened contact 4 of the built-in relay of compressor soft initiator 1 can provide for representing that compressor start completes the first signal that total head is run or the secondary signal started not yet completely simultaneously, by the coils connected in series of this normally opened contact 4 and the first relay 5, the contact of the first relay 5 just can be utilized to master controller to send the control signal of whether closing bypass of holding one's breath.
The utility model additionally provides a kind of chiller plant, comprises above-mentioned compressor soft starting device.Such as, this chiller plant can be air-conditioning, refrigerator etc.
Certainly, be more than preferred implementation of the present utility model.It should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model basic principle, can also make some improvements and modifications, these improvements and modifications are also considered as protection domain of the present utility model.
Claims (3)
1. a compressor soft starting device, is characterized in that, comprising:
Compressor soft initiator (1), generates the first signal for having started at compressor (6) when also total head is run, otherwise generates secondary signal;
Master controller (2), be connected with described compressor soft initiator (1), for closing described compressor gas bypass (3) when receiving described first signal and opening described compressor gas bypass (3) when receiving described secondary signal.
2. compressor soft starting device according to claim 1, is characterized in that,
Described compressor soft initiator (1) comprises the normally opened contact (4) for exporting described first signal or described secondary signal;
Described compressor soft starting device also comprises the first relay (5), the control end of described first relay (5) is connected with described normally opened contact (4), and the output terminal of described first relay (5) is connected with described master controller (2).
3. a chiller plant, is characterized in that, comprises the compressor soft starting device described in claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520539546.4U CN204984821U (en) | 2015-07-23 | 2015-07-23 | Soft starting drive of refrigeration plant and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520539546.4U CN204984821U (en) | 2015-07-23 | 2015-07-23 | Soft starting drive of refrigeration plant and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204984821U true CN204984821U (en) | 2016-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520539546.4U Expired - Fee Related CN204984821U (en) | 2015-07-23 | 2015-07-23 | Soft starting drive of refrigeration plant and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204984821U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065245A (en) * | 2015-07-23 | 2015-11-18 | 珠海格力电器股份有限公司 | Refrigeration equipment and compressor soft start device and method |
-
2015
- 2015-07-23 CN CN201520539546.4U patent/CN204984821U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065245A (en) * | 2015-07-23 | 2015-11-18 | 珠海格力电器股份有限公司 | Refrigeration equipment and compressor soft start device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20210723 |
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| CF01 | Termination of patent right due to non-payment of annual fee |