CN1458414A - Low load operation device and method for reciprocating compressor - Google Patents
Low load operation device and method for reciprocating compressor Download PDFInfo
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- CN1458414A CN1458414A CN 02117316 CN02117316A CN1458414A CN 1458414 A CN1458414 A CN 1458414A CN 02117316 CN02117316 CN 02117316 CN 02117316 A CN02117316 A CN 02117316A CN 1458414 A CN1458414 A CN 1458414A
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Abstract
The present invention relates to a kind of low load operation device and method for the reciprocating compressor of refrigerator and air conditioner. The low load operation device includes triggering transistor to control the powering of the compressor, reciprocating compressor capable of changing stroke via motor, capacitor to reduce the resistive component of the compressor and parallelly connected switch, outer temperature sensor and microcomputer. After the reciprocating compressor is started, the microcomputer senses via the outer temperature sensor the outer temperature and controls the on-off of the switch according to the comparison between the outer temperature and the set temperature. The present invention can reduce the high voltage caused by the reverse force during low load operation of the reciprocating compressor and avoid the damage of the triggering transistor effectively.
Description
Technical field
The present invention relates to a kind of low load operation device and method that is used for the reciprocating type compression of refrigerator and air conditioner.
Background technique
General reciprocal compressor (Linear Compressor) is not owing to adopt crankshaft, and to convert in the straight line motion process frictional loss to little so will rotatablely move.So, aspect efficient than the efficient height of other compressors.In addition, reciprocal compressor is used at refrigerator or air conditioner, utilize to change stroke (STROKE) voltage that adds to reciprocal compressor, can change compression ratio and control the change of refrigerating capacity.
Fig. 1 is the circuit block diagram of the rotating device of general reciprocal compressor.
As shown in Figure 1, the rotating device of above-mentioned reciprocal compressor includes following structure: trigger triode (Tr), reciprocal compressor (100), electric capacity (C), discharge and recharge control device (400), current detecting part (200) and microcomputer (300).When being provided with commonly used ac power supply, the above-mentioned trigger triode (Tr) that is used to control electric current is unlocked according to the trigger signal of input or is closed and controls electric current and flow into to reciprocal compressor; Above-mentioned reciprocal compressor (100) can change stroke (displacement) by motor and regulate refrigerating capacity; Above-mentioned electric capacity (C) works the buffer function of the resistance components of dwindling above-mentioned reciprocal compressor (100); Above-mentioned charging, the discharge that discharges and recharges the above-mentioned electric capacity of control device (400) adjusting in parallel with above-mentioned electric capacity (C); Above-mentioned current detecting part (200) detects the electric current that flows into to above-mentioned reciprocal compressor (100) from above-mentioned trigger triode (Tr); Above-mentioned microcomputer (300) is according to the above-mentioned adjusting portion (400) that discharges and recharges of current detection signal control of the above-mentioned current detecting part (200) of input.
Below, the driving with above-mentioned rotating device reciprocal compressor is elaborated.
At first, the ac power supply of power end 220V is supplied with the above-mentioned trigger triode (Tr1) that is used to control electric current, when above-mentioned trigger triode (Tr1) is powered, the electric power that provides to above-mentioned reciprocal compressor (100) by the above-mentioned ac power supply of triggering (trigger) SC sigmal control to door (G1) input.
So, can change stroke (displacement) by the motor of above-mentioned reciprocal compressor (100), therefore can change compression ratio.
At this moment, above-mentioned electric capacity (C) rises and to dwindle (L) buffer function of resistance components of inductor (inductor) that constitutes above-mentioned reciprocal compressor (100).
The reciprocal compressor that can change compression ratio with said structure is widely used in air-conditioning and refrigerator rise control cold energy power.
If the gate control signal that applies to the door (G1) of the above-mentioned trigger triode (Trl) that is used to control electric current is a high-end trim, then can make above-mentioned trigger triode (Tr1) conducting that is used to control electric current.So electric current flows into to above-mentioned reciprocal compressor (100), along with the inflow of electric current makes above-mentioned reciprocal compressor (100) drive the change stroke.
At this moment, in above-mentioned current detecting part (200), detect the electric current that flow into above-mentioned reciprocal compressor (100), the current value after detecting is offered above-mentioned microcomputer (300).
So, for above-mentioned reciprocal compressor (100) is worked on, above-mentioned microcomputer is calculated (300) to above-mentioned control device (400) the output control signal that discharges and recharges, and above-mentioned control signal is charged the above-mentioned electric capacity (C) that is attached at above-mentioned reciprocal compressor (100) rear end.Receive the above-mentioned gate control signal that discharges and recharges the gate signal generating unit (500) of control device (400) to door (G2) the output low-end trim of the trigger triode that is used to discharge and recharge (Tr2) of above-mentioned control signal, turn-off the above-mentioned trigger triode (Tr2) that is used to discharge and recharge above-mentioned electric capacity (C) is charged.
In addition, if the gate control signal that applies to the door (G1) of the above-mentioned trigger triode (Tr1) that is used to control electric current is a low-end trim, the above-mentioned trigger triode (Tr1) that is used to control electric current is turned off electric current can not be flowed into to above-mentioned reciprocal compressor (100).
At this moment, detecting the electric current that flow into above-mentioned reciprocal compressor (100) in above-mentioned current detecting part (200) is zero, that is to say, provides null value to above-mentioned microcomputer (300).
So, continue to drive in order to stop above-mentioned reciprocal compressor (100), above-mentioned microcomputer is calculated (300) to above-mentioned control device (400) the output control signal that discharges and recharges, and above-mentioned control signal is discharged the above-mentioned electric capacity (C) that is attached at above-mentioned reciprocal compressor (100) rear end.
Receive the above-mentioned gate control signal that discharges and recharges the gate signal generating unit (500) of control device (400) to door (G2) the output high-end trim of the above-mentioned trigger triode (Tr2) that is used to discharge and recharge of above-mentioned control signal, the above-mentioned trigger triode (Tr2) that conducting is used to discharge and recharge.
So above-mentioned electric capacity (C) discharges.
The reverse power that produces when driving by above-mentioned reciprocal compressor (100), make the voltage on the above-mentioned trigger triode (Tr1) very high, particularly, when turning round, low temperature can produce the high voltage of damaging electronic component, so need to use the trigger triode (Tr1) of high voltage bearing high price.
Summary of the invention
In order to overcome the above-mentioned shortcoming that prior art exists, the invention provides a kind of reciprocal compressor low load operation device and method, the high voltage that produces because of the reverse power of compressor when reducing low load operation, thus the trigger triode that prevents to be used to control electric current is damaged.
The technical solution adopted for the present invention to solve the technical problems is:
The present invention sets up a switch in parallel with charge and discharge capacitance and an external temperature sensor in existing reciprocal compressor rotating device, microcomputer is by external temperature sensor perception external temperature and control the break-make of above-mentioned switch according to the comparative result of external temperature and setting temperature.
Low load operation method among the present invention comprises to be judged and two steps of switch control, promptly after reciprocal compressor starts, judges that at first external temperature is higher than set point of temperature or is lower than set point of temperature; If external temperature is higher than set point of temperature, then disconnect above-mentioned switch; If external temperature is lower than set point of temperature, the above-mentioned switch of conducting then.
Based on above rotating device and method, the high voltage of the trigger triode that low temperature when running cause because of the reverse power of compressor is reduced, thereby prevent that effectively trigger triode is damaged.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the block diagram of the rotating device of general reciprocal compressor.
Fig. 2 is the block diagram of reciprocal compressor low load operation device of the present invention.
Embodiment
Fig. 2 is the circuit block diagram of reciprocal compressor low load operation device of the present invention.
As shown in Figure 2, the present invention returns campaign-styled compressor low load operation device and includes following structure: trigger triode (Trl), reciprocal compressor (100), electric capacity (C), discharge and recharge adjusting portion (400), switch (SW1), current detecting part (400) and microcomputer (300).When commonly used ac power supply was provided, the above-mentioned trigger triode (Tr1) that is used to control electric current was switched on or is turned off according to the trigger signal of input, so that electric current flows into to reciprocal compressor (100); Above-mentioned reciprocal compressor (100) changes stroke (displacement) by motor and regulates refrigerating capacity; Above-mentioned electric capacity (C) works the buffer function of the resistance components of dwindling above-mentioned reciprocal compressor (100); Above-mentioned charging, the discharge that discharges and recharges the above-mentioned electric capacity of control device (400) adjusting in parallel with above-mentioned electric capacity (C); Above-mentioned switch (SW1) is in parallel with above-mentioned electric capacity (C), and by the control signal of microcomputer (300), above-mentioned switch (SW1) is switched on or is disconnected so that the voltage of controlling on the above-mentioned trigger triode (Tr1) of electric current descends; Above-mentioned current detecting part (200) detects the electric current that flows into to reciprocal compressor (100) from the above-mentioned trigger triode (Tr1) of control electric current; Above-mentioned microcomputer (300) is according to the above-mentioned adjusting portion (400) that discharges and recharges of current detection signal control of the above-mentioned current detecting part (200) of input, and by temperature transducer (S1) perception external temperature, according to comparing the on/off of controlling above-mentioned switch (SW1) with the temperature of having set.
Fig. 3 is the workflow diagram of reciprocal compressor low load operation method of the present invention.
As shown in Figure 3, reciprocal compressor low load operation method of the present invention had as the next stage: after starting reciprocal compressor, judge whether external temperature is lower than set point of temperature; Above-mentioned judged result, if external temperature than set point of temperature height, then cut-off switch cuts off the power supply connect with reciprocal compressor; Above-mentioned judged result, if external temperature is lower than set point of temperature, then actuating switch series connection reciprocal compressor and power supply.
Below, the driving of reciprocal compressor of the present invention is elaborated.
The driving that the present invention is general is identical with prior art.That is to say, at first the ac power supply of power end 220V is supplied to the above-mentioned trigger triode (Tr1) of control electric current, when above-mentioned trigger triode (Tr1) power supply of control electric current, the electric power that provides to reciprocal compressor (100) by the above-mentioned ac power supply of triggering (trigger) SC sigmal control to door (G1) input.
So, can change stroke (displacement) by the motor of above-mentioned reciprocal compressor (100), therefore can change compression ratio.
At this moment, above-mentioned electric capacity (C) rises and to dwindle (L) buffer function of resistance components of inductor (inductor) that constitutes above-mentioned reciprocal compressor (100).
The reciprocal compressor that can change compression ratio with said structure is widely used in air-conditioning and refrigerator rise control cold energy power.
In the present invention, above-mentioned microcomputer (300) is by temperature transducer (S1) perception external temperature, if when the external temperature of perception is high than the temperature of having set, the disconnection control signal of exporting (OFF) inputed to above-mentioned switch (SW1).
So according to the disconnection control signal (OFF) of above-mentioned microcomputer (300), above-mentioned switch (SW1) is turned off and cuts off the power supply of connecting with above-mentioned reciprocal compressor (100).
On the other hand, if when the external temperature by said temperature sensor (S1) perception is lower than the temperature of having set, conducting control signal (ON) is inputed to above-mentioned switch (SW1).So above-mentioned switch (SW1) is switched on and connect above-mentioned reciprocable machine (100) and power supply, make through the high voltage on the above-mentioned trigger triode (Tr1) of control electric current to descend.
Claims (3)
1, a kind of reciprocal compressor low load operation device comprises the trigger triode that is used to control to the reciprocal compressor energising, can change the reciprocal compressor of stroke, the electric capacity that can reduce the reciprocal compressor resistance components and microcomputer by motor; The invention is characterized in to be provided with switch in parallel and external temperature sensor in the described running that microcomputer is by external temperature sensor perception external temperature and according to controlling the break-make of described switch with the comparative result of setting temperature with electric capacity.
2, reciprocal compressor low load operation device according to claim 1 is characterized in that when external temperature is lower than setting temperature, described switch conduction; When external temperature was higher than setting temperature, described switch disconnected.
3, a kind of reciprocal compressor low load operation method is characterized in that comprising and judges and switch is controlled two steps, promptly start reciprocal compressor after, judge that at first external temperature is higher than setting temperature or is lower than setting temperature; Judged result such as external temperature are higher than setting temperature, then stopcock and cut off the power supply of connecting with reciprocal compressor; Judged result such as external temperature are lower than setting temperature, then actuating switch and reciprocal compressor is connected with power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02117316 CN1292170C (en) | 2002-05-17 | 2002-05-17 | Low load operation device and method for reciprocating compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02117316 CN1292170C (en) | 2002-05-17 | 2002-05-17 | Low load operation device and method for reciprocating compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1458414A true CN1458414A (en) | 2003-11-26 |
| CN1292170C CN1292170C (en) | 2006-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02117316 Expired - Fee Related CN1292170C (en) | 2002-05-17 | 2002-05-17 | Low load operation device and method for reciprocating compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1292170C (en) |
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2002
- 2002-05-17 CN CN 02117316 patent/CN1292170C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1292170C (en) | 2006-12-27 |
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Granted publication date: 20061227 |