阅读说明：本技术 一种零负荷输出不停机的控制方法、装置及机组 (A kind of zero load exports non-stop-machine control method, device and unit ) 是由 刘华 张治平 龙忠铿 罗炽亮 张丙 赵明智 于 2019-09-16 设计创作，主要内容包括：本发明公开一种零负荷输出不停机的控制方法、装置及机组。其中,该装置包括：三通阀,设置在压缩机的排气口处；混合罐,设置在压缩机的吸气口和冷凝器之间,用于将由压缩机排出的冷媒与经由冷凝器节流后的冷媒混合；第一电子膨胀阀,设置在由冷凝器到混合罐之间的第一管路上,用于控制经由冷凝器节流后的冷媒进入混合罐的冷媒量；电磁阀,设置在由三通阀到混合罐之间的第二管路上,用于控制由压缩机排除的冷媒直接进入混合罐的冷媒量。通过本发明,实现了机组零负荷输出且不停机,使得机组始终处于待命状态,可以做到最短时间响应,提高可靠性。(The present invention discloses a kind of zero load and exports non-stop-machine control method, device and unit.Wherein, which includes: triple valve, and the exhaust ports of compressor are arranged in；Blending tank is arranged between the air entry of compressor and condenser, for mixing the refrigerant being discharged by compressor with the refrigerant after throttling via condenser；First electric expansion valve is arranged in by entering the coolant quantity of blending tank for controlling the refrigerant after throttling via condenser on condenser to the first pipeline blending tank；Solenoid valve is arranged in by triple valve to the second pipeline blending tank, for controlling the coolant quantity for being directly entered blending tank by the refrigerant that compressor excludes.Through the invention, it realizes the output of unit zero load and does not shut down, so that unit is standby always, can accomplish that the shortest time responds, improve reliability.)

1. a kind of load control unit, which is characterized in that described device includes:

The exhaust ports of compressor are arranged in triple valve；

Blending tank is arranged between the air entry and condenser of the compressor, the refrigerant for will be discharged by the compressor It is mixed with the refrigerant after throttling via condenser；

First electric expansion valve is arranged in by being passed through on the condenser to the first pipeline the blending tank for controlling Refrigerant after being throttled by condenser enters the coolant quantity of the blending tank；

Solenoid valve is arranged in by being used to control by the compression on the triple valve to the second pipeline the blending tank The refrigerant that machine excludes is directly entered the coolant quantity of the blending tank.

2. the apparatus according to claim 1, which is characterized in that described device further include:

Second electric expansion valve is arranged between the condenser and evaporator, cold after throttling via condenser for controlling Matchmaker enters the coolant quantity of the evaporator.

3. the apparatus of claim 2, which is characterized in that described device further include:

Controller, for controlling first electric expansion valve, institute according to unit target load and the adjustable minimum load of compressor State the movement of the second electric expansion valve and the solenoid valve.

4. a kind of duty control method, applied to load control unit described in any one of claims 1 to 3, feature exists In, which comprises

Compare unit target load and the adjustable minimum load of compressor；

The opening and closing of the first electric expansion valve, the second electric expansion valve and solenoid valve is controlled according to comparison result；Wherein, described first Electric expansion valve is arranged in by condenser to the first pipeline blending tank, the second electric expansion valve setting is being condensed Between device and evaporator, the solenoid valve is arranged in by compressor to the second pipeline blending tank.

5. according to the method described in claim 4, it is characterized in that, controlling the first electric expansion valve, second according to comparison result The opening and closing of electric expansion valve and solenoid valve, comprising:

If the adjustable minimum load of unit target load > compressor, the first solenoid valve closing, second electricity are controlled Magnet valve regular event, the solenoid valve are closed.

6. according to the method described in claim 4, it is characterized in that, controlling the first electric expansion valve, second according to comparison result The opening and closing of electric expansion valve and solenoid valve, comprising:

If unit target load≤compressor is adjustable minimum load, controls first solenoid valve and the second solenoid valve Standard-sized sheet, the solenoid valve are closed.

7. according to the method described in claim 4, it is characterized in that, controlling the first electric expansion valve, second according to comparison result The opening and closing of electric expansion valve and solenoid valve, comprising:

If unit target load≤compressor is adjustable minimum load, and after continuing preset duration, then it controls the solenoid valve and opens It opens, second solenoid valve closing, and, the aperture of first solenoid valve is controlled according to operating parameter.

8. the method according to the description of claim 7 is characterized in that the operating parameter includes: compressor exhaust temperature, mixing Tank liquid level, blending tank temperature；

The aperture of first solenoid valve is controlled according to operating parameter, comprising:

When the compressor exhaust temperature is more than preset temperature, controls and increase default open in the first solenoid valve unit time Degree；

In degree of superheat < 0, controls and reduce default aperture in the first solenoid valve unit time；Wherein, the degree of superheat= Blending tank temperature-saturation pressure the corresponding temperature；

When the blending tank liquid level-presets liquid level≤0, controls and reduce default aperture in the first solenoid valve unit time.

9. the method according to the description of claim 7 is characterized in that controlling opening for first solenoid valve according to operating parameter Degree, comprising:

According to the priority of the operating parameter, the aperture of the first solenoid valve described in linkage control；Wherein, the operating parameter Priority is from high to low are as follows: compressor exhaust temperature, blending tank liquid level, blending tank temperature.

10. the method according to the description of claim 7 is characterized in that controlling, the solenoid valve is opened, the second solenoid valve is closed It closes, and, before the aperture that first solenoid valve is controlled according to operating parameter, the method also includes:

If receiving zero load run signal, compressor load is reduced to minimum.

11. a kind of water-cooling screw rod unit, which is characterized in that filled including load control system described in any one of claims 1 to 3 It sets.

12. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that described program is processed The method as described in any one of claim 4 to 10 is realized when device executes.

Technical field

The present invention relates to machine set technology fields, export non-stop-machine control method, dress in particular to a kind of zero load It sets and unit.

Background technique

In the related art, determine frequency Screw chiller and be limited to slide valve control, can only achieve minimum 25% load.If be lower than 25% load, conventional frequency Screw chiller of determining cannot achieve.Under many industrial requirements backgrounds, unit is needed to accomplish that 0% is negative Lotus operation, and do not shut down, it is equivalent in standby and does not shut down.

But Screw chiller is not achieved in the case of 0% output not by compressor itself adjustable extent minimum 10% Shut down the effect of operation.

It cannot achieve zero load output and non-stop-machine problem for Screw chiller in the prior art, not yet propose have at present The solution of effect.

Summary of the invention

A kind of zero load is provided in the embodiment of the present invention and exports non-stop-machine control method, device and unit, it is existing to solve There is Screw chiller in technology to cannot achieve zero load output and non-stop-machine problem.

In order to solve the above technical problems, the present invention provides a kind of load control units, wherein the device includes:

The exhaust ports of compressor are arranged in triple valve；

Blending tank is arranged between the air entry and condenser of the compressor, for will be discharged by the compressor Refrigerant is mixed with the refrigerant after throttling via condenser；

First electric expansion valve is arranged in by the condenser to the first pipeline the blending tank, for controlling Make the coolant quantity that the refrigerant after throttling via condenser enters the blending tank；

Solenoid valve is arranged in by being used to control by described on the triple valve to the second pipeline the blending tank The refrigerant that compressor excludes is directly entered the coolant quantity of the blending tank.

Further, described device further include: the second electric expansion valve is arranged between the condenser and evaporator, Enter the coolant quantity of the evaporator for controlling the refrigerant after throttling via condenser.

Further, described device further include: controller, for according to unit target load and the adjustable minimal negative of compressor Lotus controls the movement of first electric expansion valve, second electric expansion valve and the solenoid valve.

The present invention also provides a kind of duty control methods, applied to above-mentioned load control unit, wherein the method It include: to compare unit target load and the adjustable minimum load of compressor；The first electric expansion valve, second are controlled according to comparison result The opening and closing of electric expansion valve and solenoid valve；Wherein, first electric expansion valve is arranged in by condenser to blending tank On first pipeline, second electric expansion valve is arranged between condenser and evaporator, and the solenoid valve is arranged by compressing On machine to the second pipeline between blending tank.

Further, the opening and closing of the first electric expansion valve, the second electric expansion valve and solenoid valve is controlled according to comparison result, If including: the adjustable minimum load of unit target load > compressor, the first solenoid valve closing, second electricity are controlled Magnet valve regular event, the solenoid valve are closed.

Further, the opening and closing of the first electric expansion valve, the second electric expansion valve and solenoid valve is controlled according to comparison result, If including: unit target load≤compressor is adjustable minimum load, first solenoid valve and second electromagnetism are controlled Valve standard-sized sheet, the solenoid valve are closed.

Further, the opening and closing of the first electric expansion valve, the second electric expansion valve and solenoid valve is controlled according to comparison result, If including: unit target load≤compressor is adjustable minimum load, and after continuing preset duration, then controls the solenoid valve and open It opens, second solenoid valve closing, and, the aperture of first solenoid valve is controlled according to operating parameter.

Further, the operating parameter includes: compressor exhaust temperature, blending tank liquid level, blending tank temperature；

The aperture of first solenoid valve is controlled according to operating parameter, comprising:

When the compressor exhaust temperature is more than preset temperature, controls in the first solenoid valve unit time and increase in advance If aperture；

In degree of superheat < 0, controls and reduce default aperture in the first solenoid valve unit time；Wherein, the overheat Degree=blending tank temperature-saturation pressure the corresponding temperature；

When the blending tank liquid level-presets liquid level≤0, control reduce in the first solenoid valve unit time it is default Aperture.

Further, the aperture of first solenoid valve is controlled according to operating parameter, comprising: according to the operating parameter Priority, the aperture of the first solenoid valve described in linkage control；Wherein, the priority of the operating parameter is from high to low are as follows: compression Machine delivery temperature, blending tank liquid level, blending tank temperature.

Further, the solenoid valve unlatching, second solenoid valve closing are controlled, and, it is controlled according to operating parameter Before the aperture of first solenoid valve, the method also includes: if receiving zero load run signal, reduce compressor Load is to minimum.

The present invention also provides a kind of water-cooling screw rod units, including above-mentioned load control unit.

The present invention also provides a kind of computer readable storage mediums, are stored thereon with computer program, wherein the journey Such as above-mentioned method is realized when sequence is executed by processor.

Apply the technical scheme of the present invention, realize unit zero load output and do not shut down so that unit be in always to Life state can accomplish that the shortest time responds, improve reliability.Shorten the conventional power unit standby time restarted.Reduce electricity Machine is tired because of caused by repeatedly starting and stopping, increases service life.Improve the speed that unit responds end.It reduces to machine oil The low risk of temperature drop.

Detailed description of the invention

Fig. 1 is the configuration diagram of load control unit according to an embodiment of the present invention；

Fig. 2 is the flow chart of duty control method according to an embodiment of the present invention.

Specific embodiment

To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts All other embodiment, shall fall within the protection scope of the present invention.

The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments The present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the" It is also intended to including most forms, unless the context clearly indicates other meaning, " a variety of " generally comprise at least two.

It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".

Depending on context, word as used in this " if ", " if " can be construed to " ... when " or " when ... " or " in response to determination " or " in response to detection ".Similarly, context is depended on, phrase " if it is determined that " or " such as Fruit detection (condition or event of statement) " can be construed to " when determining " or " in response to determination " or " when detection (statement Condition or event) when " or " in response to detection (condition or event of statement) ".

It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability Include, so that commodity or device including a series of elements not only include those elements, but also including not clear The other element listed, or further include for this commodity or the intrinsic element of device.In the feelings not limited more Under condition, the element that is limited by sentence "including a ...", it is not excluded that in the commodity or device for including the element also There are other identical elements.

The alternative embodiment that the invention will now be described in detail with reference to the accompanying drawings.