CN103615774A - Auxiliary device for pump system, control method for auxiliary device and pump system - Google Patents
Auxiliary device for pump system, control method for auxiliary device and pump system Download PDFInfo
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- CN103615774A CN103615774A CN201310560543.4A CN201310560543A CN103615774A CN 103615774 A CN103615774 A CN 103615774A CN 201310560543 A CN201310560543 A CN 201310560543A CN 103615774 A CN103615774 A CN 103615774A
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Abstract
The invention discloses an auxiliary device for a pump system, a control method for the auxiliary device and a pump system. The auxiliary device for the pump system comprises a first adjusting valve, a second adjusting valve, a compressor, a sensor and a controller, wherein the first adjusting valve is connected with a pump to form a closed loop through pipes; the second adjusting valve is arranged on a bypass of the closed loop; the bypass is connected with the first adjusting valve in parallel; the compressor is arranged on the bypass; the sensor is arranged on the closed loop and is used for measuring the pressure value and the temperature value in the closed loop; and the controller is connected with the sensor, acquires the pressure value and the temperature value, and controls the first adjusting valve, the second adjusting valve and the compressor according to the pressure valve and the temperature valve. When the pump system is started under the condition of low load or when the load of the pump system is low, the controller is used for controlling the first adjusting valve, the second adjusting valve and the compressor according to the acquired pressure value and the acquired temperature value in the closed loop, so that the phenomenon of cavitation erosion is avoided, the normal operation of the pump system is guaranteed, and running abrasion and noise vibration of a pump are reduced.
Description
Technical field
The present invention relates to refrigeration technology field, and especially, relate to a kind of servicing unit for pumping system and for the control method of this servicing unit, a kind of pumping system.
Background technology
Contemporary data center is in order to maintain temperature lower in machine room, and needing the annual air-conditioning that starts be that in data center, the load in work is lowered the temperature, and has produced thus huge power consumption and operating cost.Under energy-saving and emission-reduction and the dual-pressure that cuts operating costs, need to research and develop new power-saving technology and new energy-conserving product for data center.
When transition season outdoor temperature is lower, nature exists abundant natural cooling source, therefore, utilizes the low-temperature receiver of outdoor air, after technical finesse, low-temperature receiver is transported to machine room, thereby reduces the temperature of machine room, can reach the effect of energy-saving and emission-reduction.
Pumping system (because the conventional cold-producing medium of air-conditioning refrigeration system is freon, therefore also can be called fluorine pumping system) is a kind of air-conditioning system that drives cold-producing medium with pump replacement compressor.In summer, data center's special air conditioner is opened refrigeration compressor and is normally freezed, when outdoor temperature is during lower than the predefined temperature of controller, controller automatically switches to fluorine pump by compressor cooling and freezes: the cooling freon liquid in outdoor air-cooled condensation part is transported in evaporation part by fluorine pump, after heat in absorption chamber, freon changes gaseous state into by liquid state, enters air-cooled condensation part, again be cooled to liquid, go round and begin again.Because fluorine pump power is much smaller than refrigerant compression acc power, under the prerequisite of identical refrigerating capacity, the Energy Efficiency Ratio of fluorine pump is higher than refrigeration compressor, thereby when reaching cooling, plays energy-saving effect.
As shown in Figure 1, be fluorine pumping system of the prior art, in the fluorine pumping system shown in Fig. 1, its workflow is:
Pumping plant outside priming chamber (not shown, and the water side of not shown plate type heat exchanger 1), make the inflow temperature of plate type heat exchanger 1 water side drop to design temperature;
In plate type heat exchanger 1 water side absorption system, the heat of freon, makes it to be condensed into liquid state by gaseous state, enters fluid reservoir;
Load in data center is started working, and produces heat;
In system, freon passes through heat in plate type heat exchanger 2 absorption chambers, because temperature raises, and volumetric expansion, and then to plate type heat exchanger 1 diffusion;
The work that so moves in circles, thus to indoor, lower the temperature.
Wherein, fluid by pump should be liquid, if there is gas in the fluid by pump, will produce cavitation, and pump (also referred to as water pump) impeller surface is subject to the impact of cavitation and corrodes producing the phenomenon of peeling off and damaging, there is cavitation phenomenons, in addition, also can make pump produce noise and vibration, and cause pump performance to decline, when serious, can make liquid in pump interrupt, cisco unity malfunction.Therefore pumping system, before operation, needs to guarantee do not have gas to enter pump.
But existing pumping system, only have when indoor temperature is when enough freon evaporated volume high, by plate type heat exchanger 2 expands enough greatly, just can make system obtain enough driving forces, guarantee the liquid level of freon liquid in fluid reservoir, thus not residual any gas.Now open pumping system, system just can normally be moved.
Therefore, existing pump is before operation, and indoor temperature should be enough high.Otherwise, can cause pump to produce cavitation phenomenons, affect the normal operation of whole pumping system.
Although existing pump system can normally be moved in the course of the work, when being all faced with cold start-up or starting, in system drive power deficiency, fluid reservoir, there is gas residue under low loading condition, cause occurring cavitation phenomenons, affect the problem of the normal operation of pumping system.
For during in low load condition, because system drive power deficiency causes cavitation phenomenons, affecting the problem of the normal operation of pumping system in cold start-up pumping system or system in correlation technique, effective solution is not yet proposed at present.
Summary of the invention
For in correlation technique in cold start-up pumping system or system during in low load condition, because system drive power deficiency causes cavitation phenomenons, affect the problem of the normal operation of pumping system, the present invention proposes a kind of servicing unit for pumping system and for control method and the pumping system of this servicing unit, can make system in the situation that while starting under low loading condition or when the load of pumping system on the low side, reduce the generation of cavitation phenomenons, thereby improve the refrigerating efficiency of system, and reduced service wear and the noise vibration of system.
Technical scheme of the present invention is achieved in that
According to an aspect of the present invention, provide a kind of servicing unit for pumping system
Pump in accordance with the present invention system comprises pump, and pumping system servicing unit comprises the first control valve, the second control valve, compressor, sensor, controller: the first control valve, forms by pipeline and pump the closed-loop path being interconnected; The second control valve, is arranged at the bypass of closed-loop path, and bypass is in parallel with the first control valve; Compressor, is arranged at bypass; Sensor, is arranged at closed-loop path, for measuring force value and the temperature value in closed-loop path; Controller, connecting sensor, obtains force value and temperature value, and controls the first control valve, the second control valve and compressor according to force value and temperature value.
Wherein, controller is used for opening the first control valve, closes the second control valve and compressor.
Alternatively, controller is used for cutting out the first control valve, opens the second control valve and compressor.
Preferably, above-mentioned the first control valve and the second control valve are magnetic valve.
A kind of control method of the servicing unit for pumping system is provided according to an aspect of the present invention.
The control method of the servicing unit of pump in accordance with the present invention system comprises: obtain force value and temperature value in closed-loop path; According to force value and temperature value, determine the control method to the first control valve, the second control valve and compressor; According to control method, the first control valve, the second control valve and compressor are controlled.
Wherein, in force value higher than pipeline in the situation that saturation pressure during temperature value is closed the first control valve, open compressor and the second control valve; In force value lower than pipeline in the situation that saturation pressure during temperature value is opened the first control valve, close compressor and the second control valve.
According to an aspect of the present invention, provide a kind of pumping system.
Pump in accordance with the present invention system further comprises evaporation part, condensation part: evaporation part, is arranged at closed-loop path, for holding cold-producing medium; Condensation part, is arranged at closed-loop path, for holding cold-producing medium.
Preferably, evaporation part and condensation part include plate type heat exchanger.
In addition, said pump system further comprises the 3rd control valve, is arranged at closed-loop path.
And said pump system further comprises fluid reservoir, for store refrigerant.
The present invention by the situation that while starting pumping system under low loading condition or when the load of pumping system on the low side, utilize controller to control the first control valve, the second control valve and compressor according to the force value in the closed-loop path obtaining and temperature value and avoid occurring cavitation phenomenons, thereby guarantee the normal operation of pumping system, and the service wear and the noise vibration that reduce pump.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of pumping system in prior art;
Fig. 2 is according to the block diagram of the servicing unit of the pumping system of the embodiment of the present invention;
Fig. 3 is according to the flow chart of the control method of the servicing unit of the pumping system of the embodiment of the present invention;
Fig. 4 is according to the block diagram of the pumping system of the embodiment of the present invention;
Fig. 5 is the schematic diagram of fluorine pumping system according to an embodiment of the invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, the every other embodiment that those of ordinary skills obtain, belongs to the scope of protection of the invention.
According to embodiments of the invention, provide a kind of servicing unit of pumping system.
As shown in Figure 2, this pumping system comprises pump 20, according to the servicing unit of the embodiment of the present invention, comprises the first control valve 21, the second control valve 22, compressor 23, sensor 24 and controller 25.
Wherein, the first control valve 21 forms by pipeline and pump 20 closed-loop path being interconnected;
The second control valve 22 is arranged at the bypass of closed-loop path, and this bypass is in parallel with the first control valve 21;
In Fig. 2, hachure is the pipeline in closed-loop path, lines with arrow represent the direction that temperature and pressure feedback information are transmitted, the core component that controller 25 is FEEDBACK CONTROL, controller 25 is in cold start-up or under low loading condition, force value in closed-loop path is less than the saturation pressure of current temperature value, close the first control valve 21, and open the second control valve 22 and compressor 23; In the situation that the load of needs refrigeration normal operation or indoor/outdoor temperature-difference are when larger,, force value in closed-loop path is greater than the saturation pressure of current temperature value, switch the flow branch of cold-producing medium, open the first control valve 21, close the second control valve 22 and compressor 23, preferably, the first control valve 21 described in literary composition and the second control valve 22 are magnetic valve, so that controller 25 can its unlatching of electricity consumption signal controlling and closure.
According to embodiments of the invention, provide a kind of control method of servicing unit of pumping system simultaneously.
As shown in Figure 3, according to the control method of the servicing unit of the pumping system of the embodiment of the present invention, comprise:
Step S301, obtains force value and temperature value in closed-loop path;
Step S303, determines the control method to the first control valve 21, the second control valve 22 and compressor 23 according to force value and temperature value;
Step S305, controls the first control valve 21, the second control valve 22 and compressor 23 according to definite control method, controls the first control valve 21, the second control valve 22 and compressor 23 and carries out opening and closing.
Wherein, in force value higher than pipeline in the situation that saturation pressure during temperature value is closed the first control valve 21, open compressor 23 and the second control valve 22; In force value lower than pipeline in the situation that saturation pressure during temperature value is opened the first control valve 21, close compressor 23 and the second control valve 22.
According to embodiments of the invention, provide a kind of pumping system simultaneously.
As shown in Figure 4, according to the pumping system of the embodiment of the present invention, comprise the servicing unit shown in Fig. 2, and further comprise:
Wherein, evaporation part 41He condensation part 42 includes plate type heat exchanger.
Pumping system also comprises the 3rd control valve 43, is arranged at closed-loop path.
Pumping system also comprises fluid reservoir (not shown), be arranged at closed-loop path, for store refrigerant, need store refrigerant in fluid reservoir in advance, the work heat radiation situation of load of heat radiation is determined the amount of cold-producing medium and all kinds of as required, and the specification of fluid reservoir.
According to one embodiment of present invention, provide a kind of fluorine pumping system.As shown in Figure 5, on existing fluorine pumping system basis as shown in Figure 1, in the pipe section parallel connection of magnetic valve 3 light duty compressor and magnetic valve 2, and according to the temperature value in fluorine pumping system and force value by controlling the second mentioned control valve 22 in the corresponding literary composition of magnetic valve 2(), the first mentioned control valve 21 in the corresponding literary composition of magnetic valve 3() on off state, thereby selective system running status, the temperature sensor of temperature in not shown collection air pump system in Fig. 5, and control end.
Can select capacity little, but the compressor that compression ratio is high, acting as of this compressor: before fluorine pumping system is opened, by the gas of the normal temperature and pressure Freon gas boil down to HTHP in fluorine pumping system pipeline, the gas of this HTHP can liquefy at an easy rate as freon liquid, enters in fluid reservoir.
The workflow of fluorine pumping system as shown in Figure 5 comprises: before fluorine pumping system needs cold start-up, control end shut electromagnetic valve 3, while opens solenoid valve 2 and compressor, by magnetic valve 2 and compressor, the Freon gas in system pipeline is liquefied, via plate type heat exchanger 1, be extracted in fluid reservoir, now, can be so that the pressure drop in the pipeline of air pump system; When the pressure drop of the pipeline that control end receives is during to the saturation pressure of Current Temperatures in lower than pipeline, system has just obtained the original driving force that starts circulation; Now shut electromagnetic valve 2 and compressor again, opens solenoid valve 3, switches the circulation duct of cold-producing medium, then opens fluorine pump, and system is normally moved.
In sum, by means of technique scheme of the present invention, the present invention by the situation that while starting pumping system under low loading condition or when the load of pumping system on the low side, utilize controller to control the first control valve, the second control valve and compressor according to the force value in the closed-loop path obtaining and temperature value and avoid occurring cavitation phenomenons, thereby guarantee the normal operation of pumping system, and the service wear and the noise vibration that reduce pump, and can eliminate by opening at any time fluorine pumping system the rising of room temperature, just can fast reducing room temperature as long as open fluorine pump.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. for a servicing unit for pumping system, described pumping system comprises pump, it is characterized in that, comprising:
The first control valve, forms by pipeline and described pump the closed-loop path being interconnected;
The second control valve, is arranged at the bypass of described closed-loop path, and described bypass is in parallel with described the first control valve;
Compressor, is arranged at described bypass;
Sensor, is arranged at described closed-loop path, for measuring force value and the temperature value in described closed-loop path;
Controller, connects described sensor, obtains described force value and temperature value, and controls described the first control valve, described the second control valve and described compressor according to described force value and temperature value.
2. servicing unit according to claim 1, is characterized in that, described controller is used for opening described the first control valve, closes described the second control valve and described compressor.
3. servicing unit according to claim 1, is characterized in that, described controller is used for cutting out described the first control valve, opens described the second control valve and described compressor.
4. according to the servicing unit described in any one in claim 1-3, it is characterized in that, described the first control valve and described the second control valve are magnetic valve.
5. for a control method for the servicing unit described in claim 1-4 any one, it is characterized in that, comprising:
Obtain force value and temperature value in described closed-loop path;
According to described force value and temperature value, determine the control method to described the first control valve, described the second control valve and described compressor;
According to described control method, described the first control valve, described the second control valve and described compressor are controlled.
6. control method according to claim 5, is characterized in that, in described force value higher than described pipeline in the situation that saturation pressure during described temperature value is closed described the first control valve, open described compressor and described the second control valve;
In described force value lower than described pipeline in the situation that saturation pressure during described temperature value is opened described the first control valve, close described compressor and described the second control valve.
7. a pumping system, is characterized in that, comprises the servicing unit described in the favorite any one of claim 1-4, and described pumping system further comprises:
Evaporation part, is arranged at described closed-loop path, for holding cold-producing medium;
Condensation part, is arranged at described closed-loop path, for holding cold-producing medium.
8. pumping system according to claim 7, is characterized in that, described evaporation part and described condensation part include plate type heat exchanger.
9. pumping system according to claim 7, is characterized in that, further comprises:
The 3rd control valve, is arranged at described closed-loop path.
10. pumping system according to claim 7, is characterized in that, further comprises:
Fluid reservoir, for store refrigerant.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310560543.4A CN103615774B (en) | 2013-11-12 | 2013-11-12 | Auxiliary device for pump system, control method for auxiliary device and pump system |
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| CN201310560543.4A CN103615774B (en) | 2013-11-12 | 2013-11-12 | Auxiliary device for pump system, control method for auxiliary device and pump system |
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| CN103615774A true CN103615774A (en) | 2014-03-05 |
| CN103615774B CN103615774B (en) | 2017-01-18 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105928268A (en) * | 2016-07-13 | 2016-09-07 | 上海海洋大学 | Control method and system for liquid supplying of two-phase jet pump in refrigerating system |
| CN108917091A (en) * | 2018-09-28 | 2018-11-30 | 奥克斯空调股份有限公司 | A kind of air conditioner intelligent test method and its air conditioner |
| CN111609497A (en) * | 2020-05-26 | 2020-09-01 | 深圳市艾特网能技术有限公司 | Control method and control device for natural cooling machine room air conditioner and natural cooling machine room air conditioner |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105928268A (en) * | 2016-07-13 | 2016-09-07 | 上海海洋大学 | Control method and system for liquid supplying of two-phase jet pump in refrigerating system |
| CN108917091A (en) * | 2018-09-28 | 2018-11-30 | 奥克斯空调股份有限公司 | A kind of air conditioner intelligent test method and its air conditioner |
| CN111609497A (en) * | 2020-05-26 | 2020-09-01 | 深圳市艾特网能技术有限公司 | Control method and control device for natural cooling machine room air conditioner and natural cooling machine room air conditioner |
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| CN103615774B (en) | 2017-01-18 |
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Effective date of registration: 20161228 Address after: 100193 Beijing City, northeast of Haidian District Road No. 8 Building No. 36 hospital 5 floor room 528 Applicant after: Shuguang energy saving technology (Beijing) Limited by Share Ltd Address before: 100193 Beijing, Haidian District, northeast Wang West Road, building 8, No. 36 Applicant before: Dawning Information Industry (Beijing) Co., Ltd. |
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Address after: 100193 No.36 Zhongguancun Software Park, No.8 Dongbeiwang West Road, Haidian District, Beijing Patentee after: Dawning data infrastructure innovation technology (Beijing) Co.,Ltd. Address before: 100193 room 528, 5th floor, building 36, courtyard 8, Dongbeiwang Road, Haidian District, Beijing Patentee before: SUGON ENERGY-SAVING TECHNOLOGY (BEIJING) Co.,Ltd. |
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