CN113959131A - Method and device for controlling water chilling unit and water chilling unit - Google Patents
Method and device for controlling water chilling unit and water chilling unit Download PDFInfo
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- CN113959131A CN113959131A CN202111173069.0A CN202111173069A CN113959131A CN 113959131 A CN113959131 A CN 113959131A CN 202111173069 A CN202111173069 A CN 202111173069A CN 113959131 A CN113959131 A CN 113959131A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 217
- 238000000034 method Methods 0.000 title claims abstract description 53
- 239000000498 cooling water Substances 0.000 claims abstract description 59
- 238000004891 communication Methods 0.000 claims abstract description 21
- 238000005057 refrigeration Methods 0.000 claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 claims description 61
- 230000001276 controlling effect Effects 0.000 claims description 57
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 14
- 238000001704 evaporation Methods 0.000 abstract description 7
- 230000002265 prevention Effects 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 description 23
- 238000010586 diagram Methods 0.000 description 15
- 239000003507 refrigerant Substances 0.000 description 12
- 238000007710 freezing Methods 0.000 description 8
- 230000008014 freezing Effects 0.000 description 8
- 238000001816 cooling Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/13—Vibrations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Air Conditioning Control Device (AREA)
Abstract
The application relates to the technical field of refrigeration, and discloses a method for controlling a water chilling unit, wherein the water chilling unit comprises the following components: the refrigeration cycle pipeline that forms by compressor, evaporimeter and condenser intercommunication still includes: the bypass circulating pipeline is arranged between the evaporator and the condenser; the chilled water enters the condenser through a bypass circulation pipeline and then is recycled back to the evaporator, or the cooling water enters the evaporator through the bypass circulation pipeline and then is recycled back to the condenser; the method comprises the following steps: acquiring operation parameters of a water chilling unit; controlling the communication of the bypass circulation pipeline according to the operation parameters of the water chilling unit; wherein, the bypass circulation pipeline is disconnected in the initial state. In this way, when the bypass circulation line is controlled to communicate with each other, the condensing pressure of the condenser is reduced and the evaporating pressure of the evaporator is increased, thereby improving the effect of reducing the pressure ratio between the condenser and the evaporator and further improving the surge prevention effect. The application also discloses a device for controlling the water chilling unit and the water chilling unit.
Description
Technical Field
The present application relates to the field of refrigeration technology, and for example, to a method and an apparatus for controlling a chiller, and a chiller.
Background
For chiller units, when the condenser pressure is high and the evaporator pressure is low, i.e., the pressure ratio is high, the unit's unloading capacity is degraded. When the required load is small, if the load is always reduced, the water chilling unit is easy to surge. The high pressure ratio is easy to cause faults such as over-current of the compressor, high pressure ratio, high exhaust pressure, low suction pressure and the like, thereby influencing the use range of the unit.
In order to prevent the surge of a water chilling unit, an anti-surge system of the existing centrifugal refrigerating unit is shown in figure 1, a compressor (3) and a throttling device (4) are respectively connected between a condenser (1) and an evaporator (2), and a boosting branch for reducing the pressure difference between the condenser (1) and the evaporator (2) is arranged between the throttling device (4) and a freezing water inlet (7); the boosting branch circuit comprises a heat exchange device, the heat exchange device is provided with a refrigerant passage and a water passage, the refrigerant passage is communicated with the condenser (1) and the throttling device (4), the water passage is communicated with the freezing water inlet (7) and the evaporator (2), and water entering from the freezing water inlet (7) in the heat exchange device exchanges heat with a refrigerant coming out of the condenser (1).
It can be seen that in the above system, in order to prevent surge, a pressure boost branch is provided between the throttling device and the chilled water inlet to reduce the pressure differential between the condenser and the evaporator. The boosting branch circuit comprises a heat exchange device, the heat exchange device is provided with a refrigerant passage and a water passage, the refrigerant passage is communicated with the condenser and the throttling device, the water passage is communicated with the freezing water inlet and the evaporator, and water entering from the freezing water inlet in the heat exchange device exchanges heat with refrigerant coming out of the condenser. However, the refrigerant from the condenser exchanges heat with the chilled water and then enters the evaporator, and only the pressure of the evaporator can be increased, so that the effect of reducing the pressure ratio is limited, and surging cannot be well prevented.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a method and a device for controlling a water chilling unit and the water chilling unit, so as to improve the surge prevention effect.
In some embodiments, the chiller comprises: the refrigeration cycle pipeline that forms by compressor, evaporimeter and condenser intercommunication still includes: a bypass circulation line disposed between the evaporator and the condenser; the chilled water enters the condenser through the bypass circulation pipeline and is recycled back to the evaporator, or the cooling water enters the evaporator through the bypass circulation pipeline and is recycled back to the condenser; the method comprises the following steps: acquiring the operating parameters of the water chilling unit; controlling the bypass circulation pipeline to be communicated according to the operating parameters of the water chilling unit; wherein the bypass circulation line is initially disconnected.
In some embodiments, the apparatus comprises: a processor and a memory storing program instructions, the processor being configured to execute the aforementioned method for controlling a chiller when executing the program instructions.
In some embodiments, the chiller comprises: a refrigeration cycle pipeline formed by communicating a compressor, an evaporator and a condenser; the bypass circulation pipeline is arranged between the evaporator and the condenser, the chilled water enters the condenser through the bypass circulation pipeline and is recycled back to the evaporator, or the cooling water enters the evaporator through the bypass circulation pipeline and is recycled back to the condenser, and the bypass circulation pipeline is disconnected in an initial state; the pump is arranged on the bypass circulation pipeline; the regulating valve is arranged on the bypass circulation pipeline; and the device for controlling the water chilling unit.
The method and the device for controlling the water chilling unit and the water chilling unit provided by the embodiment of the disclosure can achieve the following technical effects:
according to the parameters of the water chilling unit, the bypass circulation pipeline is controlled to be communicated, so that the bypass circulation pipeline is communicated with the parameters of the water chilling unit, the condensing pressure of the condenser is reduced, the evaporating pressure of the evaporator can be increased at the same time, the effect of reducing the pressure ratio between the condenser and the evaporator is improved, and the effect of preventing surging is improved.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
FIG. 1 is a schematic diagram of a prior art centrifugal chiller surge prevention system;
fig. 2 is a schematic structural diagram of a water chiller provided in the embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of another water chiller provided by the embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a method for controlling a chiller according to an embodiment of the present disclosure;
FIG. 5 shows a method for controlling a chiller according to an embodiment of the present disclosure, where r > r1In the case of (3), control of the bypass circuitSchematic view of the general scheme;
FIG. 6 is a schematic diagram of another method for controlling a chiller according to an embodiment of the present disclosure;
fig. 7 is a schematic diagram illustrating the bypass circulation line communication control in a method for controlling a chiller according to an embodiment of the present disclosure, in a case where the unloading capacity of the chiller is minimized, the temperature of the chilled water is lower than a target temperature, and the difference between the temperature of the chilled water and the target temperature is smaller than a shutdown temperature difference;
FIG. 8 is a schematic diagram of another method for controlling a chiller according to an embodiment of the present disclosure;
FIG. 9 is a schematic diagram illustrating control of bypass circuit communication based on chiller operating parameters in a method for controlling a chiller according to an embodiment of the present disclosure;
FIG. 10 is a schematic diagram of an apparatus for controlling a chiller according to an embodiment of the present disclosure;
fig. 11 is a schematic diagram of another device for controlling a chiller according to an embodiment of the present disclosure.
Reference numerals:
10. a compressor; 20. an evaporator; 21. a chilled water line; 22. a liquid inlet section of the freezing water pipeline; 23. a liquid outlet section of the freezing water pipeline; 30. a condenser; 31. a cooling water line; 32. a liquid inlet section of the cooling water pipeline; 33. a liquid outlet section of the cooling water pipeline; 40. a bypass circulation line; 41. the liquid inlet end of the bypass circulation pipeline; 42. the liquid outlet end of the bypass circulating pipeline; 43. a heat exchange section; 50. a pump; 60. adjusting a valve; 70. a first pipeline; 71. a one-way valve; 80. a second pipeline; 81. an electronic expansion valve; 90. a third pipeline.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The term "plurality" means two or more unless otherwise specified.
The term "correspond" may refer to an association or binding relationship, and a corresponds to B refers to an association or binding relationship between a and B.
Referring to fig. 2 and 3, an embodiment of the present disclosure provides a water chilling unit, including: compressor 10, evaporator 20, condenser 30, bypass circuit 40, pump 50 and regulator valve 60. The discharge port of the compressor 10 is communicated with the inlet of the condenser 30 through a first pipe 70, the outlet of the condenser 30 is communicated with the inlet of the evaporator 20 through a second pipe 80, and the outlet of the evaporator 20 is communicated with the suction port of the compressor 10 through a third pipe 90, so that the compressor 10, the condenser 30 and the evaporator 20 are communicated to form a refrigeration cycle pipe. The first pipe 70 is provided with a check valve 71, and the check valve 71 can prevent the refrigerant in the condenser 30 from flowing backward to the compressor 10. The second pipe 80 is provided with an electronic expansion valve 81, and the electronic expansion valve 81 can control the amount of refrigerant flowing into the evaporator 20 from the condenser 30. A cooling water line 31 is provided in the condenser 30, and a freezing water line 21 is provided in the evaporator 20. A bypass circulation line 40 is also provided between the condenser 30 and the evaporator 20. The bypass circulation line 40 is initially disconnected, i.e., both the pump 50 and the regulator valve 60 are closed. Optionally, the regulator valve 60 is a PID proportional regulator valve. The compressor 10 is an air-suspension compressor, a magnetic suspension compressor, or other centrifugal compressor.
Heat exchange passages are provided in the condenser 30 or the evaporator 20. When the heat exchange channels are arranged at different positions, the bypass circulation line 40 is arranged in different ways.
The setting mode is as follows: referring to fig. 2, when a heat exchange channel is disposed in the condenser 30, the liquid inlet end 41 and the liquid outlet end 42 of the bypass circulation line 40 are both communicated with the liquid inlet section 22 of the chilled water line 21, and the liquid inlet end 41 and the liquid outlet end 42 of the bypass circulation line 40 are both located outside the evaporator 20 and are sequentially arranged along the flowing direction of the chilled water in the liquid inlet section 22 of the chilled water line 21. The heat exchange section 43 of the bypass circuit 40 is located within the condenser 30. The bypass circulation line 40 is provided with a pump 50 and a regulating valve 60. In summer, when the temperature of the chilled water is lower than the temperature of the cooling water, the control pump 50 and the control valve 60 are opened to allow the chilled water to enter the condenser 30, and the chilled water exchanges heat with the cooling water in the cooling water pipeline 31 in the heat exchange section 43 of the bypass circulation pipeline 40. The chilled water after heat exchange is circulated back to the liquid inlet section 22 of the chilled water pipeline 21 through the bypass circulation pipeline 40 and then enters the evaporator 20. After heat exchange in the evaporator 20, the refrigerant flows out from the liquid outlet section 23 of the chilled water pipeline 21.
The arrangement mode is also suitable for the use of the water chilling unit in winter. In winter, when the temperature of cooling water is about 0 ℃, some factories need to use a water chilling unit to cool equipment. At this time, the low temperature of the cooling water may cause the unit pressure to be low, which may result in the water chiller not being started or being operated reversely after being started, which is not favorable for cooling the refrigerant of the compressor 10. At this time, the pump 50 and the control valve 60 of the bypass circulation line 40 may be opened to allow the chilled water to enter the condenser 30 and exchange heat with the cooling water. Therefore, under the condition that the temperature of the chilled water is far higher than that of the cooling water in winter, the temperature of the cooling water can be increased and reduced, and the problem that a water chilling unit cannot be started and runs reversely after being started is solved.
The setting mode is two: referring to fig. 3, when a heat exchange passage is formed in the evaporator 20, the liquid inlet 41 and the liquid outlet 42 of the bypass circulation line 40 are both communicated with the liquid inlet section 32 of the cooling water line 31, and the positions where the liquid inlet 41 and the liquid outlet 42 of the bypass circulation line 40 are communicated with the cooling water line 31 are both located outside the condenser 30 and are sequentially arranged along the flowing direction of the cooling water in the liquid inlet section 32 of the cooling water line 31. The heat exchange section 43 of the bypass circuit 40 is located within the evaporator 20. The bypass circulation line 40 is provided with a pump 50 and a regulating valve 60. The arrangement mode and the arrangement mode are both suitable for the condition that the temperature of the chilled water is lower than that of the cooling water in summer. The control pump 50 and the regulating valve 60 are opened to allow the cooling water to enter the evaporator 20, and the cooling water exchanges heat with the chilled water in the chilled water line 21 in the heat exchange section 43 of the bypass circulation line 40. The cooling water after heat exchange is circulated back to the liquid inlet section 32 of the cooling water pipeline 31 through the bypass circulation pipeline 40 and then enters the condenser 30. After heat exchange in the condenser 30, the resultant liquid flows out from a liquid outlet section 33 of the cooling water line 31.
In the disclosed embodiment, a bypass circulation line 40 is added between the evaporator 20 and the condenser 30. On one hand, the flow of the chilled water is controlled by the pump 50 of the bypass circulation pipeline 40 and the regulating valve 60 and then the chilled water enters the condenser 30, so that the temperature of the chilled water absorbing heat through the condenser 30 can be increased and the condensing pressure can be reduced under the condition that the temperature of the chilled water is lower than that of the cooling water in summer, and the pressure of the evaporator 20 can be increased when the chilled water after heat exchange in the condenser 30 enters the evaporator 20 again, so that the pressure ratio between the condenser 30 and the evaporator 20 can be reduced. The reduced pressure ratio results in better compressor 10 unloading capacity, reduced surge risk, and can increase compressor 10 load at low loads, more surge resistant. Meanwhile, under the condition that the temperature of the chilled water is far higher than that of the cooling water in winter, the temperature of the cooling water is increased, the temperature of the chilled water is reduced, and the problems that a water chilling unit cannot be started and runs reversely after being started are solved. On the other hand, the flow rate of the cooling water is controlled by the pump 50 and the control valve 60 of the bypass circulation line 40 and then the cooling water is introduced into the evaporator 20, and the condensing pressure of the condenser 30 is reduced in summer, and the pressure of the evaporator 20 is increased, thereby improving the effect of reducing the pressure ratio between the condenser 30 and the evaporator 20 and the effect of preventing surging.
Referring to fig. 4, an embodiment of the present disclosure provides a method for controlling a chiller, including:
s401, the water chilling unit obtains the operation parameters of the water chilling unit.
And S402, controlling the bypass circulation pipeline to be communicated by the water chilling unit according to the operation parameters of the water chilling unit.
The operation parameters of the water chilling unit comprise: a pressure ratio r between the condenser and the evaporator, a load of the compressor, a temperature of the chilled water, a temperature of the cooling water, and the like. The water chilling unit obtains the parameters through a sensor and controls the bypass circulation pipeline to be communicated according to the parameters. When the bypass circulation pipeline is controlled to be communicated, on one hand, in summer, the temperature of the chilled water is lower than that of the cooling water: the bypass circulation pipeline adopts a first setting mode, so that chilled water enters the condenser through the bypass circulation pipeline to exchange heat with cooling water, and the condensing pressure of the condenser is reduced. And then recycled back to the evaporator to increase the evaporation pressure of the evaporator. Or the bypass circulation pipeline adopts a second setting mode, so that cooling water enters the evaporator through the bypass circulation pipeline to exchange heat with chilled water, and the evaporation pressure of the evaporator is improved. And then recycled back to the condenser, reducing the condensing pressure of the condenser. Both of the two arrangements can reduce the pressure ratio between the condenser and the evaporator, thereby preventing the surge of the water chilling unit. On the other hand, in winter, under the condition that the temperature of chilled water is far lower than that of cooling water, the bypass circulation pipeline adopts a first setting mode, so that the temperature of the cooling water is increased, the temperature of the chilled water is reduced, and the problems that a water chilling unit cannot be started and runs reversely after being started are solved.
In the embodiment of the disclosure, the on-off state of the bypass circulation pipeline is controlled according to the parameters of the water chilling unit, so that the on-off state of the bypass circulation pipeline is matched with the parameters of the water chilling unit, and under the condition of controlling the communication of the bypass circulation pipeline, the condensing pressure of the condenser is reduced, and meanwhile, the evaporating pressure of the evaporator can be improved, so that the effect of reducing the pressure ratio between the condenser and the evaporator is improved, and the effect of preventing surging is improved.
Optionally, the water chilling unit controls the bypass circulation pipeline to be communicated according to the operation parameters thereof, and includes:
the water chilling unit obtains a pressure ratio value r between the condenser and the evaporator.
At r > r1Under the condition of (3), the water chilling unit controls the communication of the bypass circulation pipeline.
r is the pressure ratio between the condenser and the evaporator, r1Is a first pressure ratio threshold. If r > r1If the pressure ratio is higher than the required unloading pressure ratio, the water chilling unit has the risk of stopping the machine if the pressure ratio is not reduced. Under the condition, the bypass circulation pipeline is controlled to be communicated, and the bypass circulation pipeline is arranged in a first arrangement mode or a second arrangement mode, so that the purpose of reducing the pressure ratio is achieved. If r is less than or equal to r1The pressure ratio is in a normal range, the water chilling unit cannot be stopped without reducing the pressure ratio, and in this case, the bypass circulation pipeline is kept in a current disconnection state. The first pressure ratio threshold r is1Can be determined according to actual needs, and the embodiment of the disclosure does not limit the embodiment.
In the embodiment of the disclosure, the communication of the bypass circulation pipeline is controlled by comparing the pressure ratio between the condenser and the evaporator with the magnitude relation of the first threshold value, so as to prevent the high pressure ratio of the water chilling unit, thereby improving the surge prevention effect.
Optionally, with reference to fig. 5, the chiller controls the bypass circulation line communication, including:
s501, the water chilling unit controls the pump to be started, and controls the adjusting valve to be opened to a preset opening degree.
S502, the water chilling unit adjusts the opening degree of the regulating valve to keep the pressure ratio r at r2(ii) a Wherein r is2Is a second pressure ratio threshold value, r1＞r2。
At r > r1The pump is controlled to be opened and the regulating valve is controlled to be opened at the same time, so that the bypass circulation pipeline is communicated. The adjusting valve is opened to a preset opening degree, and the preset opening degree is the initial opening degree of the adjusting valve. After the opening degree of the regulating valve is maintained at the preset opening degree for the first preset time, the opening degree of the regulating valve is continuously regulated, so that the pressure ratio r is kept at r2。r2Is the second pressure ratio threshold, is the target pressure ratio, and is also the pre-pressureThe ideal pressure ratio for preventing surging. Second pressure ratio threshold r2The first preset time and the preset opening degree can be determined according to actual needs, and the embodiment of the disclosure does not limit the time and the opening degree.
In this disclosed embodiment, when control bypass circulation pipeline intercommunication, when the control pump is opened, control the governing valve earlier and open to predetermineeing the aperture, make refrigerated water or cooling water circulate to the pressure ratio carries out preliminary reduction, but the reduction range is less, takes place great fluctuation in order to avoid the operation of cooling water set. After a period of time, the opening of the regulating valve is continuously regulated to keep the pressure ratio r at r2Thereby reducing the pressure ratio to a desired pressure ratio to reduce the probability of compressor surge.
Optionally, another method for controlling a water chilling unit is provided in an embodiment of the present disclosure, including:
the water chilling unit obtains a pressure ratio value r between the condenser and the evaporator.
At r > r1Under the condition of (3), the cooling unit controls the communication of the bypass circulation pipeline.
After the cooling unit controls the communication of the bypass circulation pipeline, r is less than r3Under the condition of (3), the cooling unit controls the bypass circulation pipeline to be disconnected.
And after the bypass circulation pipeline is communicated, the opening degree of the regulating valve is controlled by a PID control algorithm. The pressure ratio between the condenser and the evaporator is continuously monitored. When r < r3When the bypass circulation pipeline is controlled to be disconnected, namely the pump and the regulating valve are controlled to be closed.
Specifically, in conjunction with fig. 6, another method for controlling a chiller is provided in an embodiment of the present disclosure, including:
s601, the water chilling unit obtains a pressure ratio r between the condenser and the evaporator.
S602, when r is more than r1Under the condition of (3), the water chilling unit controls the pump to be opened and controls the regulating valve to be opened to a preset opening degree.
S603, the water chilling unit adjusts the opening degree of the regulating valve to keep the pressure ratio r at r2。
S604, adjusting the opening of the adjusting valve in the water chilling unitIn the process of degree, r is less than r3Under the condition of (3), the water chilling unit controls the bypass circulation pipeline to be disconnected.
S605, after the water chilling unit executes S601, r is less than or equal to r1The chiller maintains the current state of the pump and the regulating valve; wherein r is1Is a first pressure ratio threshold value, r2Is a second pressure ratio threshold value, r3Is a third pressure ratio threshold value, r1＞r2＞r3。
A pressure ratio r between the condensing pressure of the condenser and the evaporating pressure of the evaporator is obtained. At r > r1The pump is controlled to open, while the regulating valve is controlled to open. The adjusting valve is opened to a preset opening degree, and the preset opening degree is the initial opening degree of the adjusting valve. And after the opening degree of the regulating valve is maintained for the first preset time at the preset opening degree, continuously regulating the opening degree of the regulating valve. Under ideal conditions, the pressure ratio r can reach r by regulating the opening of the regulating valve through a PID control algorithm2. In this case, the opening degree of the regulator valve is adjusted so that the pressure ratio r is maintained at r2And (4) finishing. In another case, the pressure ratio r drops too much, i.e. to less than r, during the adjustment of the opening of the regulating valve3When, or, in order to keep the pressure ratio r at r2In the process (2), the pressure ratio r still falls and is reduced to less than r3In order to prevent the pressure ratio r from continuously decreasing, the bypass circulation line is controlled to be disconnected, that is, the pump and the regulating valve are controlled to be closed, and the decrease of the pressure ratio value is stopped. r is2Is a second pressure ratio threshold value, r3Is a third pressure ratio threshold value, r1＞r2＞r3Here, r is1The pressure ratio is a warning value of the pressure ratio, and is a value that the pressure ratio should at least reach in order to prevent the compressor from surging, so when the pressure ratio is reduced, the pressure ratio is reduced to r2And enough ascending space is reserved for the pressure ratio value, and the compressor is kept not to generate surge for a long time as far as possible, so that the cold water unit is kept to operate stably for a long time.
If the pressure ratio r between the condenser and the evaporator is obtained after the water chilling unit, if r is less than or equal to r1It shows that the pressure ratio is in a safe range without reducing the pressure ratio,and controlling the bypass circulation pipeline to be continuously disconnected, so that the pump and the regulating valve are maintained in the current closed state.
The second pressure ratio threshold r is2A third pressure ratio threshold r3And the first preset time period can be determined according to actual needs, and the embodiment of the disclosure does not limit the time period at all.
In the embodiment of the disclosure, the pressure ratio between the condenser and the evaporator can be reduced by controlling the opening of the pump and the opening of the regulating valve, thereby reducing the risk of the compressor surging. When r < r3At this time, the pump and the regulator valve are controlled to close to prevent the pressure ratio from continuing to drop.
Optionally, the water chilling unit controls the bypass circulation pipeline to be communicated according to the operation parameters thereof, and includes:
the water chilling unit obtains the unloading capacity, the load of the compressor and the temperature of the chilled water.
And under the conditions that the unloading capacity of the water chilling unit is minimum, the temperature of the chilled water is lower than the target temperature, and the difference value between the temperature of the chilled water and the target temperature is smaller than the shutdown temperature difference, the water chilling unit controls the bypass circulation pipeline to be communicated.
And acquiring the unloading capacity of the water chilling unit, the load of the compressor and the temperature of the chilled water. When the unloading capacity of the water chilling unit reaches the minimum, the temperature of the chilled water is lower than the target temperature, and the difference value between the temperature of the chilled water and the target temperature does not reach the shutdown temperature difference, namely is smaller than the shutdown temperature difference, if the small load is still continuously given to the compressor, the compressor has the risk of surging. In this case, the bypass circulation line is controlled to be communicated, and the bypass circulation line is set in a first setting mode or a second setting mode. This increases the load on the compressor and thus reduces the risk of compressor surge. The unloading capacity of the water chilling unit reaches the minimum specifically: the compressor is unloaded until the output capacity of the compressor is minimum, the power, the rotating speed and the current of the compressor can be considered as the minimum values under the corresponding working conditions, and at the moment, the output capacity of the compressor can not be reduced any more.
It should be noted that the target temperature may be determined according to actual needs, and the embodiment of the present disclosure does not set any limit to the target temperature.
Optionally, with reference to fig. 7, the chiller controls the bypass circulation line communication, including:
and S701, the water chilling unit controls the pump to be started and controls the regulating valve to be opened to a preset opening degree.
S702, the water chilling unit adjusts the opening degree of the adjusting valve, so that the temperature of the chilled water is kept at the target temperature, and the load of the compressor is kept at the target load.
And under the conditions that the unloading capacity of the water chilling unit is minimum, the temperature of the chilled water is lower than the target temperature, and the difference value between the temperature of the chilled water and the target temperature is smaller than the shutdown temperature difference, the pump is controlled to be started, and the regulating valve is controlled to be opened at the same time. The adjusting valve is opened to a preset opening degree, and the preset opening degree is the initial opening degree of the adjusting valve. And after the opening degree of the regulating valve is maintained at the preset opening degree for a second preset time, continuously regulating the opening degree of the regulating valve to increase the temperature of the chilled water and the load of the compressor, keeping the temperature of the chilled water at the target temperature and keeping the load of the compressor at the target load. It should be noted that, the second preset time period, the target temperature and the target load may all be determined according to actual needs, and the embodiment of the present disclosure does not set any limit to them.
In this disclosed embodiment, when control bypass circulation pipeline intercommunication, when the control pump was opened, control the governing valve earlier and open to predetermineeing the aperture, make refrigerated water or cooling water circulate to the temperature that makes the refrigerated water and the load of compressor obtain tentatively improving, but the increase range is less, takes place great fluctuation in order to avoid the operation of cooling water set. After a period of time, the opening degree of the regulating valve is continuously regulated, so that the temperature of the chilled water and the load of the compressor are further increased and kept at the target temperature and the target load, and the risk of surging of the compressor is reduced.
Optionally, another method for controlling a water chilling unit is provided in an embodiment of the present disclosure, including:
and under the conditions that the unloading capacity of the water chilling unit is minimum, the temperature of the chilled water is lower than the target temperature, and the difference value between the temperature of the chilled water and the target temperature is smaller than the shutdown temperature difference, the water chilling unit controls the bypass circulation pipeline to be communicated.
And under the condition that the temperature of the chilled water is higher than the target temperature and the load of the compressor is higher than a load threshold value, the water chilling unit controls the bypass circulation pipeline to be disconnected.
And after the bypass circulation pipeline is communicated, the opening degree of the regulating valve is controlled by a PID control algorithm. The temperature of the chilled water and the load on the compressor continue to be monitored. And when the temperature of the chilled water is higher than the target temperature and the load of the compressor is higher than the load threshold value, the bypass circulation pipeline is controlled to be disconnected, namely the pump and the regulating valve are controlled to be closed.
Specifically, in conjunction with fig. 8, another method for controlling a chiller is provided in an embodiment of the present disclosure, including:
s801, the water chilling unit obtains the unloading capacity, the load of the compressor and the temperature of the chilled water.
S802, when the unloading capacity of the water chilling unit is minimum, the temperature of the chilled water is lower than the target temperature, and the difference value between the temperature of the chilled water and the target temperature is smaller than the shutdown temperature difference, the water chilling unit controls the pump to be started, and controls the regulating valve to be opened to a preset opening degree.
And S803, the water chilling unit adjusts the opening degree of the adjusting valve, so that the temperature of the chilled water is kept at the target temperature, and the load of the compressor is kept at the target load.
And S804, in the process that the water chilling unit adjusts the opening of the adjusting valve, the water chilling unit controls the bypass circulation pipeline to be disconnected under the conditions that the temperature of the chilled water is higher than the target temperature and the load of the compressor is higher than a load threshold value.
And acquiring the unloading capacity of the water chilling unit, the load of the compressor and the temperature of the chilled water. And under the conditions that the load of the compressor is less than or equal to the load threshold value, the temperature of the chilled water is lower than the target temperature, and the difference value between the temperature of the chilled water and the target temperature is less than the shutdown temperature difference, controlling the pump to be started and simultaneously controlling the regulating valve to be opened. Otherwise, the bypass circulation line is controlled to remain open, i.e. the pump and the regulating valve are controlled to remain closed. After the adjusting valve is opened, the adjusting valve is opened to a preset opening degree, and the preset opening degree is the initial opening degree of the adjusting valve. And after the opening degree of the regulating valve is maintained at the preset opening degree for the second preset time, continuously regulating the opening degree of the regulating valve to improve the temperature of the chilled water and the load of the compressor. Under the ideal condition, the opening degree of the regulating valve is regulated through a PID control algorithm, so that the temperature of the chilled water can reach the target temperature, and the load of the compressor can also reach the target load. In this case, the opening degree of the regulating valve may be adjusted so that the temperature of the chilled water is maintained at the target temperature and the load of the compressor is maintained at the target load. In another case, the temperature of the chilled water increases excessively and exceeds the target temperature during the opening of the regulating valve, or the temperature of the chilled water still increases during the process of maintaining the temperature of the chilled water at the target temperature. In this case, when the load of the compressor is greater than the load threshold, the bypass circulation line is controlled to be disconnected, that is, the pump and the regulating valve are controlled to be slowly closed, and the increase of the load of the compressor and the temperature of the chilled water is stopped, in order to prevent the temperature of the chilled water from continuing to increase. Optionally, the load threshold is a compressor minimum load. It should be noted that the second preset time period, the target temperature and the target load may be determined according to actual needs, and the embodiment of the disclosure does not limit them at all.
In the embodiment of the disclosure, the temperature of the chilled water and the load of the compressor can be increased by controlling the opening of the pump and the opening of the regulating valve, so that the risk of the compressor surging is reduced. After the temperature of the chilled water and the load of the compressor reach a safe range, the pump and the regulating valve are closed in time, and certain energy can be saved.
Optionally, with reference to fig. 9, the controlling, by the chiller, communication of the bypass circulation line according to an operation parameter of the chiller includes:
and S901, the water chilling unit acquires the temperature of cooling water and the temperature of chilled water.
And S902, when the water chilling unit is started and under the condition that the temperature of the cooling water is less than the temperature threshold value, the water chilling unit controls the bypass circulation pipeline to be communicated.
The temperature of the cooling water and the temperature of the chilled water are obtained. In winter, when the temperature of cooling water is about 0 ℃, some factories need to use a water chilling unit to cool equipment. Under this condition, when the water chilling unit starts, the water chilling unit pressure is low due to the low temperature of the cooling water, and then the water chilling unit cannot be started, or the water chilling unit runs reversely after being started, so that the cooling of the refrigerant of the compressor is not facilitated. Therefore, when the water chilling unit is started, if the temperature of the cooling water is lower than the temperature threshold value, the first setting mode is adopted for the bypass circulation pipeline, the pump and the regulating valve are controlled to be opened, the chilled water enters the condenser to exchange heat, and the chilled water is recycled to the evaporator. In practical applications, the temperature threshold is 2 ℃. Therefore, under the condition that the temperature of the chilled water is far higher than that of the cooling water in winter, the temperature of the cooling water can be increased, the temperature of the chilled water can be reduced, and the problems that the water chilling unit cannot be started and runs reversely after being started are solved. And after the water chilling unit is started successfully, continuously monitoring the temperature of the cooling water and the temperature of the chilled water. Under the condition that the temperature of the cooling water is higher than that of the chilled water, the water chilling unit cannot reverse, and therefore the bypass circulation pipeline is controlled to be disconnected, namely the pump and the regulating valve are controlled to be closed.
And if the temperature of the cooling water is greater than or equal to the temperature threshold value when the water chilling unit is started, the water chilling unit controls the bypass circulation pipeline to be kept disconnected continuously, namely controls the pump and the regulating valve to be kept closed continuously.
In the embodiment of the disclosure, when the water chilling unit is started, if the temperature of the cooling water is lower than the temperature threshold, the pump and the regulating valve are controlled to be opened so as to improve the temperature of the cooling water, reduce the temperature of the chilled water and reduce the problems that the water chilling unit cannot be started and runs reversely after being started. After the water chilling unit is started successfully, if the temperature of the cooling water is higher than that of the chilled water, the pump and the regulating valve are controlled to be closed, and therefore energy is saved.
Referring to fig. 10, an apparatus for controlling a water chilling unit according to an embodiment of the present disclosure includes an obtaining module 11 and a control module 12. The acquisition module 11 is configured to acquire operating parameters of the water chilling unit; the control module 12 is configured to control the bypass circulation pipeline to be communicated according to the operation parameters of the water chilling unit; wherein, the bypass circulation pipeline is disconnected in the initial state.
The device for controlling the water chiller can control the on-off state of the bypass circulation pipeline according to the parameters of the water chiller, so that the on-off state of the bypass circulation pipeline is matched with the parameters of the water chiller, the evaporation pressure of the evaporator can be improved while the condensation pressure of the condenser is reduced under the condition of controlling the communication of the bypass circulation pipeline, the effect of reducing the pressure ratio between the condenser and the evaporator is improved, and the surge prevention effect is further improved.
As shown in fig. 11, an apparatus for controlling a water chiller according to an embodiment of the present disclosure includes a processor (processor)100 and a memory (memory) 101. Optionally, the apparatus may also include a Communication Interface (Communication Interface)102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via a bus 103. The communication interface 102 may be used for information transfer. The processor 100 may call logic instructions in the memory 101 to perform the method for controlling a chiller, of the above-described embodiments.
In addition, the logic instructions in the memory 101 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 101, which is a computer-readable storage medium, may be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes functional applications and data processing by executing program instructions/modules stored in the memory 101, that is, implements the method for controlling the chiller in the above-described embodiment.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
The embodiment of the present disclosure provides a water chilling unit, including: compressor, evaporator, condenser, bypass circulation pipeline, pump, governing valve and the above-mentioned device that is used for controlling the cooling water set. The specific embodiments of the compressor, the evaporator, the condenser, the bypass circulation line, the pump, and the regulating valve may be found in the above embodiments, and are not described herein again.
The disclosed embodiments provide a storage medium storing computer-executable instructions configured to perform the above-described method for controlling a chiller.
The storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. A method for controlling a chiller, the chiller comprising: refrigeration cycle pipeline by compressor, evaporimeter and condenser intercommunication formation, its characterized in that still includes: a bypass circulation line disposed between the evaporator and the condenser; the chilled water enters the condenser through the bypass circulation pipeline and is recycled back to the evaporator, or the cooling water enters the evaporator through the bypass circulation pipeline and is recycled back to the condenser; the method comprises the following steps:
acquiring the operating parameters of the water chilling unit;
controlling the bypass circulation pipeline to be communicated according to the operating parameters of the water chilling unit;
wherein the bypass circulation line is initially disconnected.
2. The method of claim 1, wherein the operating parameters of the chiller comprise: a pressure ratio r between the condenser and the evaporator;
the controlling the communication of the bypass circulation pipeline according to the operation parameters of the water chilling unit comprises the following steps:
at r > r1Under the condition of (3), controlling the bypass circulation pipeline to be communicated;
wherein r is1Is a first pressure ratio threshold.
3. The method of claim 2, wherein a pump and a regulator valve are provided on the bypass circulation line;
the controlling the bypass circulation line to communicate includes:
controlling the pump to be started, and controlling the regulating valve to be opened to a preset opening degree;
adjusting the opening of the regulating valve to keep the pressure ratio r at r2；
Wherein r is2Is a second pressure ratio threshold value, r1＞r2。
4. The method of claim 3, wherein after said controlling said bypass circulation line to communicate, said method further comprises:
during the process of adjusting the opening of the regulating valve, and r is less than r3Under the condition of (3), controlling the bypass circulation pipeline to be disconnected;
wherein r is3Is a third pressure ratio threshold value, r2＞r3。
5. The method of claim 1, wherein the operating parameters of the chiller comprise: the unloading capacity of the water chilling unit, the load of the compressor and the temperature of the chilled water;
the controlling the communication of the bypass circulation pipeline according to the operation parameters of the water chilling unit comprises the following steps:
and controlling the bypass circulation pipeline to be communicated under the conditions that the unloading capacity of the water chilling unit is minimum, the temperature of the chilled water is lower than the target temperature, and the difference value between the temperature of the chilled water and the target temperature is smaller than the shutdown temperature difference.
6. The method of claim 5, wherein a pump and a regulator valve are provided on the bypass circulation line;
the controlling the bypass circulation line to communicate includes:
controlling the pump to be started, and controlling the regulating valve to be opened to a preset opening degree;
and adjusting the opening of the adjusting valve to keep the temperature of the chilled water at the target temperature and keep the load of the compressor at the target load.
7. The method of claim 6, wherein after said controlling said bypass circulation line to communicate, said method further comprises:
and controlling the bypass circulation pipeline to be disconnected when the temperature of the chilled water is higher than a target temperature and the load of the compressor is higher than a load threshold value in the process of adjusting the opening of the regulating valve.
8. The method of claim 1, wherein the operating parameters of the chiller comprise: the temperature of the cooling water and the temperature of the chilled water;
the controlling the communication of the bypass circulation pipeline according to the operation parameters of the water chilling unit comprises the following steps:
and when the water chilling unit is started, controlling the bypass circulation pipeline to be communicated under the condition that the temperature of the cooling water is less than the temperature threshold value.
9. An apparatus for controlling a chiller comprising a processor and a memory storing program instructions, characterized in that the processor is configured to execute the method for controlling a chiller according to any of claims 1 to 8 when executing the program instructions.
10. The utility model provides a water chilling unit, includes the refrigeration cycle pipeline that is formed by compressor, evaporimeter and condenser intercommunication, its characterized in that still includes:
the bypass circulation pipeline is arranged between the evaporator and the condenser, the chilled water enters the condenser through the bypass circulation pipeline and is recycled back to the evaporator, or the cooling water enters the evaporator through the bypass circulation pipeline and is recycled back to the condenser, and the bypass circulation pipeline is disconnected in an initial state;
the pump is arranged on the bypass circulation pipeline;
the regulating valve is arranged on the bypass circulation pipeline; and the combination of (a) and (b),
the apparatus for controlling a chiller as set forth in claim 9.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114992801A (en) * | 2022-05-10 | 2022-09-02 | 青岛海尔空调电子有限公司 | Air conditioning system and control method thereof |
| CN115235051A (en) * | 2022-07-27 | 2022-10-25 | 广州市铭汉科技股份有限公司 | Double-control type efficient cooling water control system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100258235B1 (en) * | 1997-09-30 | 2000-06-01 | 황한규 | Surging-proof device of turbo refrigerator |
| US20050144965A1 (en) * | 2003-12-18 | 2005-07-07 | Mitsubishi Heavy Industries, Ltd. | Turbo chiller, compressor therefor, and control method therefor |
| CN104567054A (en) * | 2014-12-26 | 2015-04-29 | 珠海格力电器股份有限公司 | Anti-surge system of centrifugal refrigerating unit |
| CN106247509A (en) * | 2016-09-23 | 2016-12-21 | 昆山台佳机电有限公司 | Integral type handpiece Water Chilling Units |
| CN106288092A (en) * | 2016-09-30 | 2017-01-04 | 海南唯视雅科工程服务有限公司 | A kind of have the centrifugal refrigerating host computer system preventing surge phenomenon |
| CN109405237A (en) * | 2018-10-26 | 2019-03-01 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
-
2021
- 2021-10-08 CN CN202111173069.0A patent/CN113959131B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100258235B1 (en) * | 1997-09-30 | 2000-06-01 | 황한규 | Surging-proof device of turbo refrigerator |
| US20050144965A1 (en) * | 2003-12-18 | 2005-07-07 | Mitsubishi Heavy Industries, Ltd. | Turbo chiller, compressor therefor, and control method therefor |
| CN104567054A (en) * | 2014-12-26 | 2015-04-29 | 珠海格力电器股份有限公司 | Anti-surge system of centrifugal refrigerating unit |
| CN106247509A (en) * | 2016-09-23 | 2016-12-21 | 昆山台佳机电有限公司 | Integral type handpiece Water Chilling Units |
| CN106288092A (en) * | 2016-09-30 | 2017-01-04 | 海南唯视雅科工程服务有限公司 | A kind of have the centrifugal refrigerating host computer system preventing surge phenomenon |
| CN109405237A (en) * | 2018-10-26 | 2019-03-01 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114992801A (en) * | 2022-05-10 | 2022-09-02 | 青岛海尔空调电子有限公司 | Air conditioning system and control method thereof |
| CN114992801B (en) * | 2022-05-10 | 2024-03-22 | 青岛海尔空调电子有限公司 | Air conditioning system and control method thereof |
| CN115235051A (en) * | 2022-07-27 | 2022-10-25 | 广州市铭汉科技股份有限公司 | Double-control type efficient cooling water control system |
| CN115235051B (en) * | 2022-07-27 | 2023-03-14 | 广州市铭汉科技股份有限公司 | Double-control cooling water control system |
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