CN204063723U - A kind of self-con-tained unit of refrigeration compressor capable of preventing low temperature liquid hammer - Google Patents
A kind of self-con-tained unit of refrigeration compressor capable of preventing low temperature liquid hammer Download PDFInfo
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- CN204063723U CN204063723U CN201420539518.8U CN201420539518U CN204063723U CN 204063723 U CN204063723 U CN 204063723U CN 201420539518 U CN201420539518 U CN 201420539518U CN 204063723 U CN204063723 U CN 204063723U
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Abstract
The utility model discloses a kind of self-con-tained unit of refrigeration compressor capable of preventing low temperature liquid hammer, wherein self-con-tained unit comprises gas-liquid separator, and this gas-liquid separator arranges the inlet end of admission line; And on gas-liquid separator, be provided with the separator temperature sensor of collector surface temperature; On admission line outer wall, be arranged with electric heating body, this electric heating body is electrically connected with drive circuit, and this drive circuit is electrically connected with control circuit simultaneously; This control circuit also gathers the suction temperature pressure of inspiration(Pi) in admission line; The separator temperature sensor collected, suction temperature sensor and inspiratory pressure sensor numerical value compare by this control circuit, in situation normal any one of three numerical value, in admission line, liquid hit phenomenon does not occur, electric heating body does not heat elimination liquid hammer; In three all abnormal situations of numerical value, control circuit controls drive circuit and connects, and makes electric heating body start heating to eliminate liquid hammer.Therefore the utility model achieves and automatically watches out for liquid hammer, reduces the damage of refrigeration compressor.
Description
Technical field
The utility model relates to technical field of refrigeration compressors, particularly relates to a kind of self-con-tained unit of refrigeration compressor capable of preventing low temperature liquid hammer.
Background technology
Day by day serious along with world energy sources situation in short supply, proposes more and more higher requirement to the efficiency of the energy-consuming products such as refrigeration compressor.And refrigeration compressor is the nucleus equipment of the systems such as refrigeration, air-conditioning, handpiece Water Chilling Units, heat pump, it significantly affects the energy consumption of system, and the most direct effective means of efficiency therefore improving system improves the efficiency of refrigeration compressor.
The factor affecting refrigerant compression engine efficiency comprises low temperature liquid hammer, and this factor makes the actual efficiency of refrigeration compressor well below theoretical efficiency.Low temperature liquid hammer is because cold-producing medium does not evaporate completely, makes in the gaseous refrigerant of evaporation containing drop; Or because throttling arrangement aperture is excessive or to control the malfunctioning system refrigerant that makes too much; Or because operating temperature is low, lubricating oil viscosity ambassador lubricating condition worsens and causes liquid hammer.When refrigeration compressor occur abnormal impact with knock or strike note time, and during strong sway vibration, show liquid hit phenomenon to occur in refrigerant compression body, therefore liquid hammer exacerbates the wearing and tearing of refrigeration compressor.Especially in the winter time use refrigeration compressor, often can cause heavier liquid hammer because environment temperature is low, and directly damage refrigeration compressor.
For above-mentioned technical problem, the measure of current employing is: between evaporimeter and the admission line of refrigeration compressor, add gas-liquid separator, and the principle being equivalent to the temperature of the evaporation state cold-producing medium of normal condition according to the surface temperature of gas-liquid separator eliminates liquid hammer.The effect of this gas-liquid separator reduces the amount of liquid entering compressor, its mode eliminating liquid hammer is: allow lower pressure vapor refrigerant before cooled compressor sucks first through gas-liquid separator, the liquid be likely entrained in low-pressure steam is separated, thus ensure that the cold-producing medium entering refrigeration compressor is evaporating state, namely ensure that refrigeration compressor is dry running.The mode of this elimination liquid hammer is when refrigeration compressor normal operation, liquid hammer can be eliminated according to the surface temperature of gas-liquid separator, but once occur that evaporation is not thorough, throttling is out of control, temperature is too low, the degree of superheat is on the low side waits the situation producing drop, gas-liquid separator surface temperature is sharply declined, even frosting, cause the surface temperature of gas-liquid separator lower than the temperature of the evaporation state cold-producing medium of normal condition, if eliminate liquid hammer according to the temperature on gas-liquid separator surface more in this case, then accurately can not eliminate liquid hammer, cause refrigeration compressor damaged.
Such as, ground-source heat pump central air-conditioning using adaptability good screw type refrigerating compressor composition system, and the refrigeration compressor in system is provided with inspiratory pressure sensor and suction temperature sensor near its outlet side in admission line, this inspiratory pressure sensor and suction temperature sensor are electrically connected with the switch board of earth source heat pump machine room, the unattended automated system operation that allows in the machine room of this earth source heat pump usually.And screw type refrigerating compressor processing requires very high with assembly precision, require very high to lubricating system, lubricating oil needs oil pump, the more auxiliary equipment such as oil cooler and oil saver is supporting, therefore screw type refrigerating compressor can keep safety under compared with the liquid hammer of low degree, once occur that suction superheat is smaller liquid hammer must occur, or once be in unattended fall situation in accumulation liquid hammer situation, hydrops can make operating temperature decline, lubricating oil viscosity ambassador lubricating condition worsens, refrigeration compressor strong sway is caused to vibrate, adopt current gas-liquid separator then can not eliminate, result damages screw type refrigerating compressor.
Utility model content
The purpose of this utility model is the self-con-tained unit providing a kind of refrigeration compressor capable of preventing low temperature liquid hammer, and this self-con-tained unit just can accurately eliminate liquid hammer automatically without the need to direct surveillance, improves the efficiency of refrigeration compressor.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of self-con-tained unit of refrigeration compressor capable of preventing low temperature liquid hammer comprises gas-liquid separator, the inlet end of described gas-liquid separator is connected with the exhaust end of evaporimeter, the outlet side of described gas-liquid separator is connected with the inlet end of admission line, and the outlet side of described admission line is connected with the inlet end of refrigeration compressor; The surface of described gas-liquid separator is provided with separator temperature sensor, and described separator temperature sensor is for detecting the temperature on described gas-liquid separator surface; Also comprise the electric heating body that quantity is the ring-type of the integral multiple of three, often mutually described electric heating body is all set on described admission line outer wall; The drive circuit that quantity is consistent with described electric heating body; Each described drive circuit is all for driving the described electric heating body be connected electrically to start or stopping heating; Control circuit, described control circuit is electrically connected with described separator temperature sensor and described drive circuit respectively; Described control circuit is also electrically connected with the suction temperature sensor and inspiratory pressure sensor that are located at its outlet side close in described admission line respectively.
Preferred embodiment is, described drive circuit comprises photoelectrical coupler, and the input of described photoelectrical coupler is electrically connected with described control circuit, and the output of described photoelectrical coupler is electrically connected with bidirectional triode thyristor, and described bidirectional triode thyristor is electrically connected with described electric heating body.
Preferred embodiment is, often mutually described electric heating body all with outside ambient dielectric
Preferred embodiment is, described electric heating body selects the ceramic electric heating body of ring-type.
Preferred embodiment is, single chip circuit selected by described control circuit.
Preferred embodiment is, the self-con-tained unit of described refrigeration compressor capable of preventing low temperature liquid hammer also comprises control panel, and described control panel is provided with display screen and loudspeaker, and described display screen and loudspeaker are all electrically connected with described control circuit.
After adopting technique scheme, the beneficial effects of the utility model are: because the self-con-tained unit of refrigeration compressor capable of preventing low temperature liquid hammer of the present utility model comprises gas-liquid separator and control circuit, wherein control circuit gathers near the suction temperature sensor of outlet side and the numerical value of inspiratory pressure sensor in separator temperature sensor, admission line simultaneously, and gathered numerical value also compares by control circuit; When above-mentioned gathered any one of numerical value is normal, show that the admission line of refrigeration compressor is interior and liquid hit phenomenon does not occur, so control circuit is without the need to starting electric heating body to heat elimination liquid hammer; When the temperature on gas-liquid separator surface is lower than preset value, and continuing lower than preset value of the suction temperature in admission line, when pressure of inspiration(Pi) in admission line all continues higher than preset value, then control circuit controls drive circuit and connects, and makes electric heating body start to heat and eliminate drop in admission line to eliminate liquid hammer.Because self-con-tained unit of the present utility model is by the numerical value at detection three place, carry out automatic control electrical heating body heating accurately and eliminate liquid hammer, thus the misoperation that the surface temperature inequivalence avoiding gas-liquid separator causes when the temperature of the evaporation state cold-producing medium of normal condition; Therefore the utility model when without the need to can be automatic accurate when direct surveillance elimination liquid hammer, reduce the damage of refrigeration compressor.
Accompanying drawing explanation
Fig. 1 is the structural representation of the self-con-tained unit of the utility model refrigeration compressor capable of preventing low temperature liquid hammer;
Fig. 2 is the flow chart of the automatic control method of the self-con-tained unit of the utility model refrigeration compressor capable of preventing low temperature liquid hammer;
In figure: the inlet end of the inlet end of 1-gas-liquid separator, 10-separator, the outlet side of 11-separator, 2-admission line, 20-admission line, the outlet side of 21-admission line, 3-ceramic electric heating body, 4-suction temperature sensor, 5-inspiratory pressure sensor, 6-separator temperature sensor, the inlet end of 7-refrigeration compressor, 8-drive circuit, 80-photoelectrical coupler, 81-bidirectional triode thyristor, 9-single chip circuit.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, a kind of self-con-tained unit of refrigeration compressor capable of preventing low temperature liquid hammer, comprise gas-liquid separator 1, the inlet end 10 of this gas-liquid separator is connected with the exhaust end of evaporimeter, the outlet side 11 of this gas-liquid separator is connected with the inlet end 20 of admission line, and the outlet side 21 of this admission line is connected with the inlet end 7 of refrigeration compressor; Wherein the surface of gas-liquid separator 1 is provided with separator temperature sensor 6, and this separator temperature sensor 6 is for detecting the temperature on gas-liquid separator 1 surface; Also comprise
Quantity is the electric heating body of the twice of 3, is divided into two groups, and often group is A phase electric heating body, B phase electric heating body and C phase electric heating body, and the zero line E of every phase electric heating body is connected together; Every phase electric heating body all insulate with external environment condition, makes the environment in its applicable refrigeration compressor, increases security; The electric heating body of the present embodiment selects ring-shaped pottery electric heating body 3;
The drive circuit 8 that quantity is consistent with electric heating body, the present embodiment is six drive circuits 8, the drive circuit 8 of the present embodiment comprises a photoelectrical coupler 80, the input of this photoelectrical coupler 80 is electrically connected with control circuit, the output of this photoelectrical coupler 80 is electrically connected with bidirectional triode thyristor 81, and this bidirectional triode thyristor 81 is electrically connected with ceramic electric heating body 3; Wherein bidirectional triode thyristor 81 can be replaced by switches such as one-way SCR, triode or diodes, but the power utilization rate of rest switch is not high; Because bidirectional triode thyristor 81 has the function of two-way admittance, the forward of power supply and negative sense are all utilized; Above-mentioned photoelectrical coupler 80, by isolation good for the signal of telecommunication of input, output, improves the security that refrigeration compressor runs;
Control circuit, the present embodiment selects single chip circuit 9, this single chip circuit 9 is electrically connected with separator temperature sensor 6, suction temperature sensor 4 and inspiratory pressure sensor 5 respectively, therefore single chip circuit 9 can gather the surface temperature of gas-liquid separator 1, near the suction temperature of its outlet side and pressure of inspiration(Pi) in admission line 2.This single chip circuit 9 is also electrically connected with the input of the photoelectrical coupler 80 of each drive circuit 8, make the signal of telecommunication that single chip circuit 9 can disconnect to photoelectrical coupler 80 input or connect, and then control bidirectional triode thyristor 81 ends or conducting, the final control ceramic electric heating body 3 that realizes starts or stops heating;
The self-con-tained unit of refrigeration compressor capable of preventing low temperature liquid hammer also comprises control panel, this control panel is provided with display screen and loudspeaker, wherein display screen and loudspeaker are all electrically connected with single chip circuit 9, make single chip circuit 9 can by the display of every numerical value on a display screen, can allow loudspeaker sounding alarm simultaneously.
As shown in Figure 2, the automatic control method of the utility model self-con-tained unit is:
Gather numerical value: single chip circuit 9 does not stop to gather the numerical value of separator temperature sensor 6, suction temperature sensor 4 and inspiratory pressure sensor 5;
Compare: the surface temperature value Ta1 of the gas-liquid separator 1 that separator temperature sensor 6 gathers by single chip circuit 9 and preset value Ta0 compares; Temperature value Tb1 and the preset value Tb0 of the admission line 2 gathered by suction temperature sensor 4 compare; Pressure value P 1 and the preset value P0 of the admission line 2 gathered by inspiratory pressure sensor 5 compare;
Judge and issue an order: when the surface temperature value Ta1 of gas-liquid separator 1 is not less than preset value Ta0, single chip circuit 9 controls drive circuit 8 and disconnects; When the surface temperature value Ta1 of gas-liquid separator 1 is lower than preset value Ta0, when suction superheat (refer in kind of refrigeration cycle under identical evaporating pressure the overtemperature of cold-producing medium and the difference of saturation temperature) value is lower than preset value, the suction temperature Tb1 of admission line 2 continues lower than preset value Tb0, when the pressure of inspiration(Pi) force value P1 of admission line 2 continues lower than preset value P0, single chip circuit 9 controls drive circuit 8 and connects, and ceramic electric heating body 3 heats; This ceramic electric heating body 3, with the heating of the heating rate of temperature rise each second 0.2 ~ 0.5 DEG C, due to ceramic electric heating body 3 quick heating, thus does not affect the work of refrigeration compressor;
Liquid hammer is eliminated: single chip circuit 9 detects the heated condition of ceramic electric heating body 3, after ceramic electric heating body 3 is heated to 15 DEG C, liquid evaporation liquid hammer in admission line 2 is eliminated, and single chip circuit 9 controls drive circuit 8 and disconnects, and makes ceramic electric heating body 3 stop heating.
Above-mentioned single chip circuit 9 control ceramic electric heating body 3 energising start heat or power-off stop heating mode can be, bidirectional triode thyristor 81 is disconnected and makes the voltage of ceramic electric heating body 3 be adjusted to 50V stopping heating, make the voltage of ceramic electric heating body 3 be adjusted to 220V bidirectional triode thyristor 81 connection and start heating.
When the pressure of inspiration(Pi) P1 of the suction temperature value Tb1 in the surface temperature value Ta1 of gas-liquid separator 1, admission line 2 lower than preset value Ta0, admission line 2 being detected higher than preset value, gathered every numerical value shows on a display screen by single chip circuit 9, and loudspeaker powers alarm.When normal any one of the pressure of inspiration(Pi) P1 of the suction temperature value Tb1 detected in the surface temperature value Ta1 of gas-liquid separator 1, admission line 2 and admission line 2, single chip circuit 9 all to the signal of telecommunication that the input of the input of photoelectrical coupler 80 disconnects, makes ceramic electric heating body 3 not heat.
In use, separator temperature sensor 6 does not stop the surface temperature of detection gas-liquid separator 1 and this temperature value is passed to single chip circuit 9 self-con-tained unit of the present utility model, and single chip circuit 9 by this numeric ratio comparatively, draws normal or abnormal result; The single chip circuit 9 locality test item pressure of inspiration(Pi) of source source pump indispensability and the numerical value of suction temperature simultaneously, and this numerical value is compared; Final single chip circuit 9 utilizes 3 modes detected, assign the order that ceramic electric heating body 3 stops or starting heating, thus avoid the situation of the generation drops such as cold-producing medium evaporation is thorough, throttling is out of control, temperature is too low, the degree of superheat is on the low side, gas-liquid separator 1 surface temperature is sharply declined even frosting, and the situation making gas-liquid separator 1 accurately can not eliminate liquid hammer occurs.And self-con-tained unit of the present utility model is without the need to manual operation, automatically completes liquid hammer and eliminate, improve the security of operation.
The above preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, etc. the improvement etc. of self-con-tained unit structure of same refrigeration compressor capable of preventing low temperature liquid hammer, all should be included within protection domain of the present utility model.
Claims (6)
1. the self-con-tained unit of a refrigeration compressor capable of preventing low temperature liquid hammer, comprise gas-liquid separator, the inlet end of described gas-liquid separator is connected with the exhaust end of evaporimeter, the outlet side of described gas-liquid separator is connected with the inlet end of admission line, and the outlet side of described admission line is connected with the inlet end of refrigeration compressor; The surface of described gas-liquid separator is provided with separator temperature sensor, and described separator temperature sensor is for detecting the temperature on described gas-liquid separator surface; It is characterized in that: also comprise
Quantity is the electric heating body of the ring-type of the integral multiple of three, and often mutually described electric heating body is all set on described admission line outer wall;
The drive circuit that quantity is consistent with described electric heating body; Each described drive circuit is all for driving the described electric heating body be connected electrically to start or stopping heating;
Control circuit, described control circuit is electrically connected with described separator temperature sensor and described drive circuit respectively; Described control circuit is also electrically connected with the suction temperature sensor and inspiratory pressure sensor that are located at its outlet side close in described admission line respectively.
2. the self-con-tained unit of refrigeration compressor capable of preventing low temperature liquid hammer according to claim 1, it is characterized in that: described drive circuit comprises photoelectrical coupler, the input of described photoelectrical coupler is electrically connected with described control circuit, the output of described photoelectrical coupler is electrically connected with bidirectional triode thyristor, and described bidirectional triode thyristor is electrically connected with described electric heating body.
3. the self-con-tained unit of refrigeration compressor capable of preventing low temperature liquid hammer according to claim 2, is characterized in that: every mutually described electric heating body all with the ambient dielectric of outside.
4. the self-con-tained unit of refrigeration compressor capable of preventing low temperature liquid hammer according to claim 2, is characterized in that: described electric heating body selects the ceramic electric heating body of ring-type.
5. the self-con-tained unit of the refrigeration compressor capable of preventing low temperature liquid hammer according to any one of claim 1-4, is characterized in that: single chip circuit selected by described control circuit.
6. the self-con-tained unit of refrigeration compressor capable of preventing low temperature liquid hammer according to claim 5, it is characterized in that: the self-con-tained unit of described refrigeration compressor capable of preventing low temperature liquid hammer also comprises control panel, described control panel is provided with display screen and loudspeaker, and described display screen and loudspeaker are all electrically connected with described control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420539518.8U CN204063723U (en) | 2014-09-18 | 2014-09-18 | A kind of self-con-tained unit of refrigeration compressor capable of preventing low temperature liquid hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420539518.8U CN204063723U (en) | 2014-09-18 | 2014-09-18 | A kind of self-con-tained unit of refrigeration compressor capable of preventing low temperature liquid hammer |
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| CN204063723U true CN204063723U (en) | 2014-12-31 |
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| CN201420539518.8U Withdrawn - After Issue CN204063723U (en) | 2014-09-18 | 2014-09-18 | A kind of self-con-tained unit of refrigeration compressor capable of preventing low temperature liquid hammer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104197596A (en) * | 2014-09-18 | 2014-12-10 | 山东宏力热泵能源股份有限公司 | Self-control device for low-temperature liquid impact prevention of refrigeration compressor and self-control method |
| CN115218556A (en) * | 2021-04-20 | 2022-10-21 | 芜湖美智空调设备有限公司 | Compressor for air conditioner, air conditioner and control method of air conditioner |
-
2014
- 2014-09-18 CN CN201420539518.8U patent/CN204063723U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104197596A (en) * | 2014-09-18 | 2014-12-10 | 山东宏力热泵能源股份有限公司 | Self-control device for low-temperature liquid impact prevention of refrigeration compressor and self-control method |
| CN115218556A (en) * | 2021-04-20 | 2022-10-21 | 芜湖美智空调设备有限公司 | Compressor for air conditioner, air conditioner and control method of air conditioner |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141231 Effective date of abandoning: 20160608 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |