CN105298797A - Liquid impact preventing device for compressor, control method of liquid impact preventing device and refrigeration air conditioner - Google Patents
Liquid impact preventing device for compressor, control method of liquid impact preventing device and refrigeration air conditioner Download PDFInfo
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- CN105298797A CN105298797A CN201410312321.5A CN201410312321A CN105298797A CN 105298797 A CN105298797 A CN 105298797A CN 201410312321 A CN201410312321 A CN 201410312321A CN 105298797 A CN105298797 A CN 105298797A
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Abstract
The invention provides a liquid impact preventing device for a compressor, a control method of the liquid impact preventing device and a refrigeration air conditioner. The liquid impact preventing device for the compressor comprises the compressor and a gas-liquid separation buffer. The air compressor and the gas-liquid separation buffer are communicated through an air compressor suction pipe. The gas-liquid separation buffer is connected with a drain pipe. A first switch valve is arranged on the drain pipe. The liquid impact preventing device for the compressor has the beneficial effects that through the arrangement of the gas-liquid separation buffer and the drain pipe used for discharging liquid left in the gas-liquid separation buffer, the situation that the liquid left in the gas-liquid separation buffer is sucked into the air compressor when the air compressor is started, and consequentially liquid impact is caused when the air compressor is started is avoided; the safety when the air compressor is started is improved, and accordingly the service life of the refrigeration air conditioner is prolonged.
Description
Technical field
The present invention relates to the technical field of air-conditioning, refer more particularly to a kind of compressor anti-liquid impact device and controlling method, refrigeration air-conditioner.
Background technique
In refrigerated air-conditioning system, liquid hammer causes one of compressor badly damaged key factor.Liquid hit phenomenon is once occur, often cause that compressor scroll is broken (for scroll compressor), connecting rod cracking (for piston compressor), even there will be severe the consequences such as fried cylinder, and then compressor electric motor also may be caused to burn and the problems such as contaminated system pipeline.Because compressor damage often causes very large economic loss to user, as: cause visual plant in refrigerating environment to break down, need change and damage compressor and cleaning pollution pipeline etc.Therefore, seeming of liquid hammer situation is particularly important to prevent compressor from occurring.
When refrigeration air-conditioner lengthy shut down; refrigerant migration may be caused due to factors such as indoor and outdoor temperature differences and accumulate in sucking pipe place in liquid form, just easily causing liquid hit phenomenon to occur if these liquid refrigerants are drained not in time before compressor start.Along with refrigeration air-conditioner producer is to the enhancing day by day of energy-conserving product attention degree, some equipment, for energy-conservation consideration, can be provided with refrigerated medium pump and compressor in the circulatory system simultaneously.When outdoor temperature is very low, isolated operation refrigerated medium pump refrigerant conveying is discharged to outdoor low temperature environment the heat of indoor; And when outdoor temperature is higher, then use compressor traditionally against Carnot's cycle, the heat of indoor to be discharged to outdoor environment.Because above-mentioned two kinds of methods of operation need main devices and most of gas/liquid pipes such as shared identical vaporizer, condenser, expansion valve, so need the auxiliary elements such as corresponding electromagnetic switch valve or one-way valve to isolate according to different operating modes.But these auxiliary elements are in use if there is fault, liquid refrigerant accumulation also may be caused at the place such as compressor suction duct and gas-liquid separator, if do not drained in time, also it can be caused to damage because of liquid hammer when compressor start.
Summary of the invention
The invention provides a kind of compressor anti-liquid impact device and controlling method, refrigeration air-conditioner, in order to improve Safety performance when refrigeration air-conditioner uses, and then improve the working life of refrigeration air-conditioner.
The invention provides a kind of compressor anti-liquid impact device, this device comprises: compressor and gas-liquid separation buffer device, be communicated with by compressor suction duct between described compressor with described gas-liquid separation buffer, and described gas-liquid separation buffer is connected with liquid-discharging tube, described liquid-discharging tube is provided with the first switch valve.
In technique scheme, by the gas-liquid separation buffer arranged and the liquid-discharging tube that liquid remaining in gas-liquid separation buffer is discharged, avoid compressor when starting, the liquid remained in gas-liquid separation buffer is inhaled in compressor, compressor is caused to occur the situation of liquid hammer when starting, improve the Security of compressor when starting, and then improve the working life of refrigeration air-conditioner.
Preferably, described gas-liquid separation buffer has first-level buffer chamber, and described first-level buffer chamber is communicated with described liquid-discharging tube, is communicated with between described first-level buffer chamber and described compressor by compressor suction duct.The gas-liquid separation buffer with first-level buffer chamber can be adopted.
Preferably, described compressor suction duct is positioned at the pipeline opening in described first-level buffer chamber upward.Structure is simple, facilitates the flowing of gas.
Preferably, described gas-liquid separation buffer has first-level buffer chamber and level 2 buffering chamber, and described level 2 buffering chamber was communicated with described first-level buffer chamber by connecting tube, and described level 2 buffering chamber is communicated with described compressor by described compressor suction duct.The Security of compressor when starting further is improve by level 2 buffering chamber.By having the gas-liquid separation buffer separating liquid in first-level buffer chamber and level 2 buffering chamber.
Preferably, be positioned at the pipeline opening in described first-level buffer chamber described connecting tube upward, described compressor suction duct is positioned at the pipeline opening in described level 2 buffering chamber upward.Structure is simple, facilitates the flowing of gas.
Preferably, described liquid-discharging tube is provided with positive displacement pump.Further improve the efficiency of discharge opeing, and can the better liquid got rid of thoroughly in gas-liquid separation buffer.
Preferably, also comprise:
To be arranged in described first buffer cavity and liquid level detection device for detecting liquid level in gas-liquid separation buffer;
Control gear, is connected with described liquid level detection device and described signal compressor respectively, when the liquid level that described liquid level detection device detects exceeds the first setting value, stops described compressor start.Achieve the liquid level in automatic monitoring gas-liquid separation buffer by control gear, avoid compressor and start under unfavorable operating mode and the liquid hammer situation caused.
Preferably, described first switch valve is electromagnetic switch valve, and described electromagnetic switch valve is connected with described control gear signal, when the liquid level that described control gear is also further used for detecting at described liquid level detection device exceeds the first setting value, control described electromagnetic switch valve to open, when described liquid level is lower than the second setting value, controls described electromagnetic switch valve and close.Achieve the Automated condtrol of discharge opeing, further improve Safety performance during compressor start.
Preferably, described first switch valve is electromagnetic switch valve, and described positive displacement pump is electromagnetic pump, also comprises:
To be arranged in described first buffer cavity and liquid level detection device for detecting liquid level in gas-liquid separation buffer;
Control gear, be connected with described liquid level detection device, described compressor, described first switch valve and described positive displacement pump signal respectively, when the liquid level that described liquid level detection device detects exceeds the first setting value, stop described compressor start, control described first switch valve to open to start with described positive displacement pump and carry out discharge opeing simultaneously, when described liquid level is lower than the second setting value, control described first switch valve and described positive displacement pump closedown stopping discharge opeing.Further improve the efficiency of automatic drain, associate the start-stop of compressor simultaneously, ensure the safe operation of compressor.
Present invention also offers a kind of controlling method of above-mentioned compressor, this controlling method comprises the following steps:
Detect the liquid level of the liquid in gas-liquid separation buffer;
When the liquid level of described liquid is more than the first setting value, controls the first switch valve and open, by the liquid in drain line drains gas-liquid separation buffer, when described liquid level is lower than the second setting value, controls described first switch valve and close.
Preferably, the liquid in described detection gas-liquid separation buffer is specially: detect the liquid level in described gas-liquid separation buffer by liquid level detection device.
Preferably, also comprise: when the liquid level of described liquid is more than the first setting value, stop compressor start; Improve the Security of compressor.
Preferably, when the liquid level of described liquid is lower than the second setting value, start compressor according to refrigeration demand.Improve the Security of compressor when starting.
The invention provides a kind of refrigeration air-conditioner, this refrigeration air-conditioner comprises: the compressor anti-liquid impact device described in above-mentioned any one.
In technique scheme, by the gas-liquid separation buffer arranged and the liquid-discharging tube that liquid remaining in gas-liquid separation buffer is discharged, avoid compressor when starting, the liquid remained in gas-liquid separation buffer is inhaled in compressor, compressor is caused to occur the situation of liquid hammer when starting, improve the Security of compressor when starting, and then improve the working life of refrigeration air-conditioner.
Accompanying drawing explanation
The structural representation of the compressor anti-liquid impact device that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the another kind of compressor anti-liquid impact device that Fig. 2 provides for the embodiment of the present invention;
The structural representation of the another kind of compressor anti-liquid impact device that Fig. 3 provides for the embodiment of the present invention;
The structural representation of the refrigeration air-conditioner of the employing single compressor that Fig. 4 provides for the embodiment of the present invention;
The structural representation of the refrigeration air-conditioner of the employing pump that Fig. 5 provides for the embodiment of the present invention and compressor;
The structural representation of the another kind of refrigeration air-conditioner of the employing pump that Fig. 6 provides for the embodiment of the present invention and compressor;
The structural representation of the another kind of refrigeration air-conditioner of the employing pump that Fig. 7 provides for the embodiment of the present invention and compressor;
The structural representation of the another kind of refrigeration air-conditioner of the employing pump that Fig. 8 provides for the embodiment of the present invention and compressor.
Reference character:
101-air suction main 102-compressor bypass pipe 103-second switch valve
104-sucking pipe 105-one-way valve 106-compressor
107-compressor exhaust pipe 108-oil separator 109-exhaust check valve
110-exhaust manifold 111-condenser 112-refrigerated medium pump
113-one-way valve 114-expansion valve 115-vaporizer
301-first-level buffer chamber 302-connecting tube 303-compressor suction duct
304-gas-liquid separation buffer 305-first switch valve 306-liquid-discharging tube
307-positive displacement pump 308-liquid level detection device 309-level 2 buffering chamber
400-control gear
Embodiment
In order to improve the compressor Security in use of refrigeration air-conditioner, and then improve the working life of refrigeration air-conditioner, the invention provides a kind of compressor anti-liquid impact device and controlling method thereof, refrigeration air-conditioner, in the inventive solutions, to the liquor separation of the gas entered in compressor be about to out by adopting gas-liquid separation buffer, and isolated liquid is sent in condenser by liquid-discharging tube, thus avoid compressor and occur the situation of liquid hammer when starting, improve compressor Security in use, and then improve the working life of refrigeration air-conditioner.For making the object, technical solutions and advantages of the present invention clearly, for nonrestrictive embodiment, the present invention is described in further detail below.
As shown in Figure 1, Fig. 1 shows the structural representation of a kind of compressor anti-liquid impact device that the embodiment of the present invention provides.
Embodiments provide a kind of compressor anti-liquid impact device, this device comprises: compressor 106 and gas-liquid separation buffer device 304, compressor 106 is communicated with by compressor suction duct 303 with gas-liquid separation buffer device 304, and described gas-liquid separation buffer 304 is connected with liquid-discharging tube 306, described liquid-discharging tube 306 is provided with the first switch valve 305.
In the above-described embodiments, by arranging gas-liquid separation buffer 304 in the ingress of compressor 106, enter the liquid contained in the gas of compressor 106 to be separated in gas-liquid separation buffer 304, avoid liquid to enter in compressor 106 and cause liquid hammer, simultaneously, in order to avoid the liquid level remaining in the liquid in gas-liquid separation buffer 304 higher time, enter in compressor 106 and cause liquid hammer, the compressor anti-liquid impact device provided in the present embodiment is also provided with liquid-discharging tube 306, for the liquid in gas-liquid separation buffer 304 is discharged, concrete, in use, the outlet of liquid-discharging tube 306 can be connected to the ingress of condenser, before compressor 106 starts, if desired discharge opeing, then open the first switch valve 305, the liquid that liquid-discharging tube 306 is discharged enters in condenser, close the first switch valve 305 afterwards, restart compressor 106, thus avoid the situation that liquid hammer appears in compressor 106, improve the working life of compressor 106, and then improve the working life of air-conditioning.
Gas-liquid separation buffer 304 wherein can adopt different structures, both can adopt the structure with first-level buffer chamber 301, also can adopt and have the first-level buffer chamber 301 of connection and the structure in level 2 buffering chamber 309, be described below in conjunction with accompanying drawing.
As shown in Figure 1, Fig. 1 shows structure when adopting first-level buffer chamber 301.This gas-liquid separation buffer 304 only has first-level buffer chamber 301, first-level buffer chamber 301 is communicated with liquid-discharging tube 306, be communicated with by compressor suction duct 303 between first-level buffer chamber 301 and compressor 106, wherein, the opening direction being positioned at the compressor suction duct 303 in first-level buffer chamber 301 can towards any direction, preferably, compressor suction duct 303 is positioned at the pipeline opening in first-level buffer chamber 301 upward.Adopt the relatively simple for structure of this kind of structure compresses machine sucking pipe 303, facilitate the flowing of gas simultaneously.
As shown in Figure 3, Fig. 3 shows structure when adopting first-level buffer chamber and level 2 buffering chamber.This level 2 buffering chamber 309 was communicated with first-level buffer chamber 301 by connecting tube 302, and level 2 buffering chamber 309 is communicated with compressor 106 by compressor suction duct 303, and level buffer cavity 301 is communicated with liquid-discharging tube 306.Wherein, the opening direction of connecting tube 302 and compressor suction duct 303 can be any direction, preferably, be positioned at the pipeline opening in described first-level buffer chamber 301 connecting tube 302 upward, described compressor suction duct 303 is positioned at the pipeline opening in described level 2 buffering chamber 309 upward, facilitates the flowing of gas.The Security of compressor 106 when starting further is improve by arranging two-stage buffer cavity.Should be understood that, in level 2 buffering chamber 309, connecting tube 302 is directly communicated with compressor suction duct 303, in level 2 buffering chamber 309, the setting position of the mouth of pipe of connecting tube 302 and compressor suction duct 303 staggers, and the liquid that the connecting tube 302 being communicated with first-level buffer chamber 301 and level 2 buffering chamber 309 is flowed out can not directly enter in compressor suction duct 303.
In the structure of above-mentioned concrete gas-liquid separation buffer 304, no matter adopt that structure, the compressor suction duct 303 used and the set-up mode of connecting tube 302 all adopt vertical set-up mode, preferably, the import of pipeline all upward, avoids the liquid remained in gas-liquid separation buffer 304 to flow in pipeline.
When by opening the first switch valve 305 fluid discharge in gas-liquid separation buffer 304 being gone out, human at periodic intervals can be adopted to open the mode of discharge, and conveniently staff obtains the opportunity of tapping, as shown in Figure 2, preferably, this compressor anti-liquid impact device also comprises:
To be arranged in described first buffer cavity 301 and liquid level detection device 308 for detecting liquid level in gas-liquid separation buffer 304;
Control gear 400, is connected with described liquid level detection device 308 and described compressor 106 signal respectively, when the liquid level that described liquid level detection device 308 detects exceeds the first setting value, stops described compressor 106 to start.
By the liquid level adopting liquid level detection device 308 to detect the liquid in gas-liquid separation buffer 304, and by control gear 400 when the liquid level received exceeds the first setting value, compressor 106 is stoped to start, thus avoid compressor 106 and occur liquid hammer when starting, wherein the first setting value of liquid level is ensure that compressor 106 can not suck the highest liquid level of liquid when starting, first switch valve 305 is opened by staff, liquid in gas-liquid separation buffer 304 is bled off, when the liquid level of the liquid in gas-liquid separation buffer 304 is lower than the first setting value, close the first switch valve 305, control gear 400 stops the restriction starting compressor 106, now, compressor 106 normally can start according to refrigeration demand, control gear 400 wherein can be single-chip microcomputer conventional in prior art, PLC or industrial PC, above-mentioned control gear 400 has good controlling functions, liquid level detection device 308 wherein can be level meter, the liquid level detection device 308 that sensor is common, the producer can select different control gear 400 and liquid level detection device 308 according to actual conditions.
Continue with reference to figure 2, as a kind of preferred version, above-mentioned first switch valve 305 is electromagnetic switch valve, and electromagnetic switch valve is connected with control gear 400 signal, when the liquid level that described control gear 400 is also further used for detecting at described liquid level detection device 308 exceeds the first setting value, control described electromagnetic switch valve to open, and when liquid level is lower than the second setting value, controls described electromagnetic switch valve and close.Control the first switch valve 305 by control gear 400 to open or close, achieve the Automated condtrol to fluid discharge in gas-liquid separation buffer 304, the situation of making a fault when avoiding labor management occurs, and further improves refrigeration air-conditioner Security in use.
In addition, as shown in Figures 2 and 3, in order to improve the efficiency of discharge opeing, this liquid-discharging tube 306 is provided with positive displacement pump 307.As the preferred scheme of one, this positive displacement pump 307 is electromagnetic pump, and the first switch valve 305 adopts electromagnetic switch valve, positive displacement pump 307 is all connected with control gear 400 signal with the first switch valve 305, control gear 400 is also further used for: when the liquid level that described liquid level detection device 308 detects exceeds the first setting value, described compressor 106 is stoped to start, control described first switch valve 305 to open to start with described positive displacement pump 307 and carry out discharge opeing simultaneously, when described liquid level is lower than the second setting value, control described first switch valve 305 and described positive displacement pump 307 closedown stopping discharge opeing.By the positive displacement pump 307 arranged, the liquid be stored in gas-liquid separation buffer 304 can be discharged away fast, improve the efficiency of discharge opeing, and can more thoroughly liquid be discharged.
The embodiment of the present invention additionally provides a kind of controlling method of above-mentioned compressor anti-liquid impact device, and this controlling method comprises the following steps:
Detect the liquid level of the liquid in gas-liquid separation buffer;
When the liquid level of described liquid is more than the first setting value, controls the first switch valve and open, by the liquid in drain line drains gas-liquid separation buffer, when described liquid level is lower than the second setting value, controls described first switch valve and close.
The Security of compressor when starting is improve by above-mentioned controlling method.Concrete, the liquid level of the liquid in gas-liquid separation buffer was detected before starting compressor, when liquid level is more than the first setting value, the startup demand of shielding compressor, then control the first switch valve to open, by the liquid in drain line drains gas-liquid separation buffer, when described liquid level is lower than the second setting value, control described first switch valve to close, then start compressor according to refrigeration demand.Thus make the height of the liquid in gas-liquid separation buffer lower than the liquid height be easily inhaled in compressor, improve the Security of compressor when starting.
Conveniently to the understanding of this method, be described in detail with specific embodiment below.
The liquid level of the liquid in step one, detection vapor-liquid separation buffer;
Concrete, detect the liquid level in described gas-liquid separation buffer by liquid level detection device.
Step 2, when the liquid level of described liquid is more than the first setting value, shielding compressor startup demand, then control the first switch valve and open, by the liquid in drain line drains gas-liquid separation buffer.
Concrete, the altitude signal of the liquid detected by control gear 400 receiving liquid level detecting apparatus, and this signal and the first setting value are compared, when altitude signal is higher than the first setting value, first control gear 400 shields the startup demand of compressor, then controls the first switch valve and opens.Improve the Security of compressor.
Step 3, when described liquid level is lower than the second setting value, control described first switch valve close, then according to refrigeration demand start compressor.
Can be found out by foregoing description, the controlling method that this enforcement provides can effectively avoid compressor to occur liquid hammer situation when starting, and improves compressor Security in use.
Embodiments provide a kind of refrigeration air-conditioner, this refrigeration air-conditioner comprises: the compressor anti-liquid impact device described in above-mentioned any one.
In the above-described embodiments, by the gas-liquid separation buffer 304 arranged and the liquid-discharging tube 306 that liquid remaining in gas-liquid separation buffer 304 is discharged, avoid compressor 106 when starting, the liquid remained in gas-liquid separation buffer 304 is inhaled in compressor 106, compressor 106 is caused to occur the situation of liquid hammer when starting, improve the Security of compressor 106 when starting, and then improve the working life of refrigeration air-conditioner.
Wherein, above-mentioned air-conditioning both can adopt the air-conditioning only having compressor 106, also can adopt the air-conditioning of band compressor 106 and pump 112, concrete:
As shown in Figure 4, Fig. 4 shows the structure of the air-conditioning adopting single compressor, now, this air-conditioning comprises compressor 106, condenser 111, vaporizer 115 and expansion valve 114, preferably can comprise oil separator 108, its concrete linkage structure as shown in Figure 4, wherein, condenser 111 and vaporizer 115 are linked to be the path of a circulation by pipeline, between condenser 111 and vaporizer 115, be also provided with expansion valve 114, the outlet of vaporizer 115 has air suction main 101, the inlet communication of condenser 111 has exhaust manifold 110, the gas-liquid separation buffer 304 of gas for entering in sucking pipe 104 and liquor separation is provided with between vaporizer 115 and compressor 106, and gas-liquid separation buffer 304 is communicated with exhaust manifold 110 by liquid-discharging tube 306, liquid-discharging tube 306 is provided with the first switch valve 305, compressor 106 is connected with oil separator 108 by compressor exhaust pipe 107, the pipeline of the outlet of oil separator 108 is provided with one-way valve, this one-way valve is exhaust check valve 109.In this air-conditioning, the situation avoiding compressor by providing the gas-liquid separation buffer 304 with liquid-discharging tube 306 and occur liquid hammer.In structure in the diagram, illustrate only the structure adopting first-level buffer chamber, gas-liquid separation buffer adopts level 2 buffering chamber 309, structure with positive displacement pump 307, and adopt the structure with control gear 400 also can be applied in the air-conditioning adopting single compressor, principle when its principle works with above-mentioned compressor anti-liquid impact device is identical, and this is no longer going to repeat them.Better, when adopting the compressor anti-liquid impact device with control gear 400, control gear 400 can also be connected with warning device, when the liquid level detected is more than the first setting value, remind staff to need to discharge liquid in time by warning device, prevent compressor start generation liquid hammer situation.
When adopting the air-conditioning of pattern of pump+compressor, as shown in Fig. 5, Fig. 6, Fig. 7 and Fig. 8, the above-mentioned structure that there is shown air-conditioning employing pump+compressor, concrete Fig. 5 shows structure when adopting the gas-liquid separation buffer in first-level buffer chamber to be arranged on air-conditioning, Fig. 6 shows, with the structure of the air-conditioning of the gas-liquid separation buffer of positive displacement pump; Fig. 7 and Fig. 8 gas-liquid separation buffer shown with first-level buffer chamber and level 2 buffering chamber is arranged on structure during air-conditioning, and wherein, Fig. 8 is with structure during positive displacement pump.
Conveniently understand the technological scheme that the present embodiment provides, below in conjunction with Fig. 8, the refrigeration air-conditioner that the embodiment of the present invention provides is described.
Composition graphs 8, the refrigeration air-conditioner that the present embodiment provides comprises: condenser 111, vaporizer 115, compressor 106, gas-liquid separation buffer 304, preferably, also comprises oil separator 108, wherein, condenser 111 and vaporizer 115 are linked to be the path of a circulation by pipeline, on the pipeline being communicated with condenser 111 outlet and vaporizer 115 import, be parallel with two branch path, one of them branch path is provided with refrigerated medium pump 112, another branch path is refrigerated medium pump 112 bypass, this bypass is provided with one-way valve 113, and house steward between refrigerated medium pump 112 and vaporizer 115 is also provided with expansion valve 114, the outlet of vaporizer 115 has air suction main 101, the inlet communication of condenser 111 has exhaust manifold 110, and air suction main 101 is communicated with by compressor bypass pipe 102 or sucking pipe 104 with exhaust manifold 110, compressor bypass pipe 102 is provided with one-way valve 105, sucking pipe 104 is provided with second switch valve 103, compressor 106 and oil separator 108, the gas-liquid separation buffer 304 of gas for entering in sucking pipe 104 and liquor separation is provided with between second switch valve 103 and compressor 106, and gas-liquid separation buffer 304 is communicated with exhaust manifold 110 by liquid-discharging tube 306, liquid-discharging tube 306 is provided with the first switch valve 305, compressor 106 is connected with oil separator 108 by compressor exhaust pipe 107, the pipeline of the outlet of oil separator 108 is provided with one-way valve, this one-way valve is exhaust check valve 109.
Refrigerated air-conditioning system shown in composition graphs 2 is analyzed, and apparatus of the present invention realize compressor 106, and to start the specific works principle of liquid impact prevention protective function as follows:
(1) when operating in pump pattern and each cooling module all normally works, the circulation route of refrigeration agent is 101-102-105-110-111-112-114-115-101;
(2) when system is run according to step (1) mode, if second switch valve 103 cannot reliable turn-off, owing to there is pressure reduction between air suction main 101 and exhaust manifold 110, second switch valve 103 can be passed through under above-mentioned differential pressure action from vaporizer 115 gas-liquid two-phase refrigerant mixture out, then leak into the first-level buffer chamber 301 of gas-liquid separation buffer 304.Owing to being communicated with only by connecting tube 302 between first-level buffer chamber 301 and level 2 buffering chamber 309, therefore, if the pressure reduction foot between air suction main 101 and exhaust manifold 110 is large, and the pressure reduction endurance longer time, liquid refrigerant liquid level in first-level buffer chamber 301 can raise gradually, and forms the fluid column increased gradually.When the refrigerant level in first-level buffer chamber 301 reaches the alarm liquid level of liquid level detection device 308, " failure of second switch valve breakdown " alarm can be triggered.Now, if compressor 106 has startup demand, then this startup demand can shield by controlled device 400.Meanwhile, control gear 400 is opened the first switch valve 305 and is carried out discharge opeing.Can be learnt by fluid flowing law, compressor bypass pipe 102 can be greater than the pressure of liquid-discharging tube 306 and exhaust manifold 110 joint with the pressure of air suction main 101 joint.Therefore, once the first switch valve 305 is opened, the liquid refrigerant in the first-level buffer chamber 302 of gas-liquid separation buffer 304 can flow directly in exhaust manifold 110 and can not rise always.Liquid level in first-level buffer chamber 301 is higher, and the fluid column of formation impels the speed of its discharge opeing faster.In order to further improve the efficiency of discharge opeing, also on liquid-discharging tube 306, a positive displacement pump 307 can be installed, by positive displacement pump 307, liquid be emitted as soon as possible.
(3) the liquid refrigerant liquid level in the first-level buffer chamber 301 of gas-liquid separation buffer 304 lower than the second setting value after, control gear 400 controls the first switch valve 305 and cuts out, then the restriction that compressor 106 starts is removed, if now still have startup demand, then according to normal logic startup optimization.And second switch valve 103 turns off failed alarm and can eliminate, also can retain, after reminding attendant, fault second switch valve 103 be overhauled or changed.
(4) alarm liquid level of gas-liquid separation buffer 304 lower than the suction port of the compressor suction duct 303 in first-level buffer chamber 301, and should leave certain safe distance, enters secondary delay in chamber 309 to prevent liquid refrigerant.Two buffer cavitys independent of each other are arranged in gas-liquid separation buffer 304, mainly consider if when liquid-discharging tube 306 discharge opeing is not thorough, a small amount of liquid refrigerant can be retained in first-level buffer chamber 301 and compressor suction duct 303 inside, if compressor 106 starts at this moment, still there is the risk that liquid hammer occurs.Especially may be larger for hyperbaric chamber scroll compressor liquid hammer risk, so need increase level 2 buffering chamber 309 to start moment from the residual liquid refrigeration agent in first-level buffer chamber 301 to deposit compressor 106.In addition, for the ease of compressor 106 oil return, be provided with spill port at compressor suction duct 303 and the bottom of connecting tube 302, with to ensure when compressor 106 runs lubricant oil can between two buffer cavitys proper flow.As traditional gas-liquid separator, also reserve balancing orifice at compressor suction duct 303 and the top of connecting tube 302, to ensure the liquid level safety between down period in described two pipelines.
(5) when compressor 106 runs, the first switch valve 305 is in closed condition all the time and directly gets back to suction side to prevent compressor 106 high pressure gas.
By increasing above-mentioned protective gear in refrigeration air-conditioner, then coordinate corresponding protecting control logic just can reach the function that compressor 106 starts liquid impact prevention.Relate in excessive season and first run by refrigerated medium pump 112 situation that a period of time is switched to compressor 106 operation again, because second switch valve 103 turns off not thorough, probability that is that cause compressor 106 to start liquid hazards can be controlled very well, improves the reliability and stability of equipment application greatly.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (14)
1. a compressor anti-liquid impact device, it is characterized in that, comprise compressor (106) and gas-liquid separation buffer device (304), be communicated with by compressor suction duct (303) between described compressor (106) with described gas-liquid separation buffer (304), and described gas-liquid separation buffer (304) is connected with liquid-discharging tube (306), described liquid-discharging tube (306) is provided with the first switch valve (305).
2. compressor anti-liquid impact device as claimed in claim 1, it is characterized in that, described gas-liquid separation buffer (304) has first-level buffer chamber (301), described first-level buffer chamber (301) is communicated with described liquid-discharging tube (306), is communicated with between described first-level buffer chamber (301) and described compressor (106) by compressor suction duct (303).
3. compressor anti-liquid impact device as claimed in claim 2, it is characterized in that, described compressor suction duct (303) is positioned at the pipeline opening of described first-level buffer chamber (301) upward.
4. compressor anti-liquid impact device as claimed in claim 1, it is characterized in that, described gas-liquid separation buffer (304) has first-level buffer chamber (301) and level 2 buffering chamber (309), described level 2 buffering chamber (309) was communicated with described first-level buffer chamber (301) by connecting tube (302), described level 2 buffering chamber (309) is communicated with described compressor (106) by described compressor suction duct (303), and described first-level buffer chamber (301) is communicated with described liquid-discharging tube (306).
5. compressor anti-liquid impact device as claimed in claim 4, it is characterized in that, be positioned at the pipeline opening of described first-level buffer chamber (301) described connecting tube (302) upward, described compressor suction duct (303) is positioned at the pipeline opening of described level 2 buffering chamber (309) upward.
6. the compressor anti-liquid impact device as described in any one of claim 2 ~ 5, is characterized in that, described liquid-discharging tube (306) is provided with positive displacement pump (307).
7. the compressor anti-liquid impact device as described in any one of claim 2 ~ 5, is characterized in that, also comprise:
To be arranged in described first buffer cavity (301) and liquid level detection device (308) for detecting gas-liquid separation buffer (304) interior liquid level;
Control gear (400), be connected with described liquid level detection device (308) and described compressor (106) signal respectively, when the liquid level that described liquid level detection device (308) detects exceeds the first setting value, described compressor (106) is stoped to start.
8. compressor anti-liquid impact device as claimed in claim 7, it is characterized in that, described first switch valve (305) is electromagnetic switch valve, and described electromagnetic switch valve is connected with described control gear (400) signal, when the liquid level that described control gear (400) is also further used for detecting at described liquid level detection device (308) exceeds the first setting value, control described electromagnetic switch valve to open, when described liquid level is lower than the second setting value, controls described electromagnetic switch valve and close.
9. compressor anti-liquid impact device as claimed in claim 6, it is characterized in that, described first switch valve (305) is electromagnetic switch valve, and described positive displacement pump (307) is electromagnetic pump, also comprises:
To be arranged in described first buffer cavity (301) and liquid level detection device (308) for detecting gas-liquid separation buffer (304) interior liquid level;
Control gear (400), respectively with described liquid level detection device (308), described compressor (106), described first switch valve (305) is connected with described positive displacement pump (307) signal, when the liquid level that described liquid level detection device (308) detects exceeds the first setting value, described compressor (106) is stoped to start, control simultaneously described first switch valve (305) open with described positive displacement pump (307) start carry out discharge opeing, when described liquid level is lower than the second setting value, control described first switch valve (305) and described positive displacement pump (307) closedown stopping discharge opeing.
10. a controlling method for compressor anti-liquid impact device as claimed in claim 1, is characterized in that, comprise the following steps:
Detect the liquid level of the liquid in gas-liquid separation buffer (304);
When the liquid level of described liquid is more than the first setting value, control the first switch valve (305) to open, the liquid in described gas-liquid separation buffer (304) is discharged by liquid-discharging tube (306), when described liquid level is lower than the second setting value, control the closedown of described first switch valve (305).
11. controlling methods as claimed in claim 10, is characterized in that, the liquid in described detection gas-liquid separation buffer is specially:
The liquid level in described gas-liquid separation buffer is detected by liquid level detection device.
12. controlling methods as claimed in claim 11, is characterized in that, also comprise: when the liquid level of described liquid is more than the first setting value, stop compressor start.
13. controlling methods as claimed in claim 12, is characterized in that, also comprise: when the liquid level of described liquid is lower than the second setting value, start compressor according to refrigeration demand.
14. 1 kinds of refrigeration air-conditioners, is characterized in that, comprise the compressor anti-liquid impact device as described in any one of claim 1 ~ 9.
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| CN201410312321.5A CN105298797A (en) | 2014-07-02 | 2014-07-02 | Liquid impact preventing device for compressor, control method of liquid impact preventing device and refrigeration air conditioner |
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| CN201410312321.5A CN105298797A (en) | 2014-07-02 | 2014-07-02 | Liquid impact preventing device for compressor, control method of liquid impact preventing device and refrigeration air conditioner |
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| 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 |
| CN108731311A (en) * | 2018-07-12 | 2018-11-02 | 珠海凌达压缩机有限公司 | A kind of compressor assembly and its air-conditioning system |
| CN111811171A (en) * | 2020-05-29 | 2020-10-23 | 北京中能航科科技有限公司 | Gas-liquid separation control method for megawatt centrifugal low-temperature air source heat pump system |
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| CN111811171A (en) * | 2020-05-29 | 2020-10-23 | 北京中能航科科技有限公司 | Gas-liquid separation control method for megawatt centrifugal low-temperature air source heat pump system |
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Address after: Nanshan District Xueyuan Road in Shenzhen city of Guangdong province 518055 No. 1001 Nanshan Chi Park building B2 Applicant after: Vitamin Technology Co., Ltd. Applicant after: Vitamin Technology (Jiangmen) Co., Ltd. Address before: Nanshan District Xueyuan Road in Shenzhen city of Guangdong province 518055 No. 1001 Nanshan Chi Park building B2 Applicant before: Aimosheng Network Energy Source Co., Ltd. Applicant before: Emerson Network Power (Jiangmen) Co., Ltd. |
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Application publication date: 20160203 |