KR101584451B1 - Chiller system and chiller set - Google Patents
Chiller system and chiller set Download PDFInfo
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- KR101584451B1 KR101584451B1 KR1020140109557A KR20140109557A KR101584451B1 KR 101584451 B1 KR101584451 B1 KR 101584451B1 KR 1020140109557 A KR1020140109557 A KR 1020140109557A KR 20140109557 A KR20140109557 A KR 20140109557A KR 101584451 B1 KR101584451 B1 KR 101584451B1
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Abstract
The present invention relates to a chiller set.
The chiller set according to one aspect includes: a first chiller module having a first compressor; A second chiller module having a second compressor; And a control panel for controlling the first chiller module and the second chiller module, wherein when the first compressor and the second compressor are operated together, either the first compressor or the second compressor is connected to the main compressor And the other operates as the sub compressor, and when the condition change condition of the sub compressor is satisfied, the sub compressor is changed to the main compressor and operates.
Description
The present specification relates to a chiller system.
Generally, a chiller supplies cold water to a cold water consumer, and is characterized in that heat exchange is performed between a refrigerant circulating in a refrigeration system and cold water circulating between a cold water consumer and a refrigeration system to cool the cold water. The chiller is a large-capacity facility and can be installed in a large-scale building.
1 is a view showing a conventional chiller system.
Referring to FIG. 1, a
The chiller unit includes a
The refrigerant is heat-exchanged with the outside air in the condenser (3), and can be heat-exchanged with the cold water in the evaporator (5).
The
When the
The evaporator (5) is provided with a refrigerant passage (5a) through which refrigerant flows and a cold water passage (5b) through which cold water flows. The coolant in the
The chiller unit may be provided in various sizes or capacities. Here, the size or the capacity of the chiller unit may be expressed in units of a freezing tone (RT) as a concept corresponding to the capability of the refrigeration system, that is, the refrigeration capacity.
The conventional chiller unit may be equipped with various refrigeration tones according to the size of a building or the like where the chiller unit is installed, the capacity of the circulating cold water, the air conditioning capacity, or the like. For example, the chiller unit may have a capacity of 1000RT, 1500RT, 2000RT, 3000RT, or the like.
Generally, as the capacity of the chiller unit increases, the volume of the chiller unit becomes larger.
Once the size of the building on which the chiller unit is installed or the required air conditioning capacity is determined, the capacity of the chiller unit is determined and the chiller unit is built based on the determined capacity.
However, since the chiller unit is a large-capacity facility, it takes several months for the production to be completed after the specific capacity is determined, and the consumer is complaining about the production period.
In addition, when the chiller unit is broken during the use of the chiller system, the operation of the entire chiller unit is limited, and it takes a long time to repair the chiller unit, thereby limiting the air conditioning operation of the building.
It is an object of the present invention to provide a chiller system with good product productivity and market responsiveness.
It is another object of the present invention to provide a chiller system and a chiller set in which the operation of the entire system can be stably maintained even when a warning or a fault occurs in a compressor of a chiller module.
The chiller set according to one aspect includes: a first chiller module having a first compressor; A second chiller module having a second compressor; And a control panel for controlling the first chiller module and the second chiller module, wherein when the first compressor and the second compressor are operated together, either the first compressor or the second compressor is connected to the main compressor And the other operates as the sub compressor, and when the condition change condition of the sub compressor is satisfied, the sub compressor is changed to the main compressor and operates.
Also, the main compressor may be controlled by a first control method, and the sub compressor may be controlled by a second control method.
The first control method is a method of controlling the operation of the main compressor so that the outlet temperature of the cold water discharged from the evaporator reaches the target temperature, The second control method may be a method of operating following the main compressor.
If the state change condition of the sub compressor is satisfied, a warning cause of the main compressor is generated. If the condition change condition of the sub compressor is satisfied, the compressor operating as the main compressor is changed to the sub compressor .
If the state change condition of the sub compressor is satisfied, it may be the case that the main compressor is stopped due to a failure cause of the main compressor.
In addition, the control panel may include a display unit for displaying a screen including driving order information of the compressors, and the driving order information may include priority and operational information of the compressors.
When the cause of the warning of the main compressor is generated, the priorities of the compressors may be changed and displayed in the driving order information.
In addition, if a warning cause of the main compressor is generated, warning information may be displayed in the alarm generating unit of the screen.
The warning information may disappear from the alarm generating unit when the status change from the alarm generating unit to the main compressor of the compressor operating as the sub compressor is completed.
Also, when the main compressor is stopped, the order of the compressors operating in the sub-compressor is changed to the first order in the operation order information, and the stopped compressor is displayed in the off state.
A chiller system according to another aspect comprises a chiller set having a plurality of chiller modules; And a starter communicating with the chiller set and capable of supplying power to the chiller set, wherein each of the plurality of chiller modules includes a compressor, a condenser, and an evaporator, wherein condition change conditions of some of the plurality of compressors If satisfied, the control method of the compressor may be changed.
The first compressor of the plurality of compressors is controlled by a first control method, the second compressor of the compressor is controlled by a second control method, and when the condition change condition of the second compressor is satisfied, The control method of the second compressor can be changed from the second control method to the first control method.
If the state change condition of the second compressor is satisfied, the first compressor may be stopped.
If the state change condition of the second compressor is satisfied, the control method of the first compressor may be changed from the first control method to the second control method.
According to the proposed invention, since the chiller set is provided as a modularized structure, the chiller set can be produced quickly and effectively according to the size of the building where the chiller system is installed or the required air conditioning ability.
In addition, even if some chiller modules fail during the use of the chiller system, only the failed chiller module can be repaired or replaced, thereby preventing the chiller system from being operated for a long period of time.
Further, since the sub compressor is controlled in accordance with the main compressor, the load can be prevented from being concentrated by any of the compressors.
Further, when the cause of the alarm occurs in the compressor operating as the main compressor, the control method is changed so as to operate as the sub compressor, and the control method is changed so that the sub compressor which operates normally functions as the main compressor. Can be prevented.
In addition, when the cause of the alarm occurs in the compressor operating as the main compressor, frequent changes in the opening of the guide vane of the compressor causing the warning cause are prevented by changing the control method to operate with the sub compressor, The performance can be maintained at the present performance, so that the operation performance of the compressor in which the warning cause has occurred can be prevented from deteriorating.
According to the present embodiment, even if the main compressor is stopped due to a failure in the main compressor, it is minimized that the operation performance of the entire system is lowered as the sub compressor is changed to the main compressor and operated.
1 is a view showing a conventional chiller system.
2 is a diagram illustrating a configuration of a chiller system according to an embodiment of the present invention.
3 is a system diagram showing a configuration of a chiller module according to an embodiment of the present invention.
4 is a conceptual diagram of the chiller module of Fig.
5 is a perspective view of a chiller module in accordance with one embodiment of the present invention.
6 is a front view of the chiller module shown in Fig.
FIG. 7 is a perspective view showing a chiller set according to an embodiment of the present invention; FIG.
8 is a block diagram schematically illustrating a chiller system according to an embodiment of the present invention.
9 is a flowchart illustrating a control method of a chiller system according to an embodiment of the present invention.
10 is a flowchart illustrating a control method for changing a state of a compressor according to an embodiment of the present invention.
11 to 13 are views showing screens displayed on a first control panel according to an embodiment of the present invention.
14 is a flowchart illustrating a control method for changing a state of a compressor according to an embodiment of the present invention.
15 is a diagram illustrating a screen displayed on a first control panel according to an embodiment of the present invention.
Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals whenever possible, even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.
In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;
FIG. 2 is a diagram illustrating the configuration of a chiller system according to an embodiment of the present invention. FIG. 3 is a system diagram illustrating a configuration of a chiller module according to an embodiment of the present invention. It is a conceptual diagram.
2 to 4, a
The
Between the
The cooling water circulating
At least one of the cooling water
An
A cold water circulating passage (50) is provided between the chiller module (100) and the cold water consumer (30). The cold
The cold
A cold water pump (56) driven for the flow of cold water may be provided in at least one of the cold water inlet flow path (52) and the cold water outlet flow path (54). For example, in FIG. 2, it is shown that the cold water
The
For example, the
In Fig. 2, for example, the
Specifically, the air handling unit includes a
The
An indoor
When the
The mixed air that has been exchanged (cooled) with the
The
The
The
An
The compressor (110) includes an impeller (111) for compressing the refrigerant. Also, the
The
The
The
The
The cooling
On the coolant outlet side of the
The
The
The
The cold
FIG. 5 is a perspective view of a chiller module according to an embodiment of the present invention, and FIG. 6 is a front view of a chiller module shown in FIG.
4 to 6, the
The
In the
The cooling water flows through the cooling
For convenience of explanation, the flow direction of the cooling water or the cold water will be referred to as the longitudinal direction of the
In addition, the cooling
Also, in the
The cold water flows through the cold
In addition, the cold
Here, the
The
Here, the
This is to reduce the interval between the
Also, the installation area can be reduced by stacking the
The
The
6, the
As described above, the
The
In one embodiment, the user may control the operation of the
At this time, the
In addition, various pipes (for example, refrigerant pipes) constituting the
The
In addition, the
The
The
The
A
A
Meanwhile, the flow direction of the cold water flowing through the
7 is a perspective view illustrating a chiller set according to an embodiment of the present invention.
Referring to FIG. 7, the chiller set according to an embodiment of the present invention may include a plurality of
In FIG. 7, for example, a plurality of
The plurality of
The
The chiller set may include a cooling water connection pipe connecting the
Here, the cold water connection pipe serves as a passageway for transferring the cold water that has passed through the cold water tube array of the
In addition, the cooling water connection pipe serves as a passageway for transmitting the cooling water, which has passed through the cooling water tube array of the
As described above, the first compressor, the first evaporator, and the first condenser are stacked along the vertical direction of the installation surface of the
Specifically, a
At this time, the cold water connection pipe connects the
The
The
At this time, the first supporting
8 is a block diagram schematically illustrating a chiller system according to an embodiment of the present invention.
8, a chiller system according to an embodiment of the present invention includes a plurality of chiller sets 301 and 302, a starter 320 capable of supplying power to the plurality of chiller sets 301 and 302, And a main control unit 340 connected to the
Each of the plurality of chiller sets 301 and 302 may include a plurality of chiller modules.
For example, the plurality of chiller sets 301 and 302 may include a first chiller set 301 and a second chiller set 302.
The first chiller set 310 may include a
Each of the
In the present specification, it is to be noted that the number of the plurality of chiller sets and the number of the plurality of chiller modules constituting each set of chillers are not limited.
Although not shown, each of the
The first chiller set 301 may further include a
The main control unit 300 can control whether the chiller module is operated according to a required refrigeration load or an operation load of the chiller module.
The
The
The plurality of
In this embodiment, the number of the plurality of switches may be equal to the number of the plurality of chiller modules.
The plurality of chiller modules according to the present embodiment can be sequentially activated. Here, the startup sequence of the chiller module may be determined in advance.
The main control unit 340 may transmit an operation signal of the chiller module to the
For example, if each chiller module has a capacity of 500RT, the chiller system will require three chiller modules to be activated when the refrigeration capacity required for the chiller system, ie the operating load of the chiller system is 1,500RT.
At this time, the main controller 340 may transmit a control command to the
And, with three Chiller modules operating, it is possible to maintain, increase or decrease the number of Chillom modules operated on the basis of the load of the system, that is, the cold water temperature load or the compressor operating load.
According to the present embodiment, since the chiller set is provided in a modularized form, the production of the chiller set can be made quickly and effectively according to the size of the building on which the chiller system is installed or the necessary air conditioning ability.
In addition, even if some chiller modules fail during the use of the chiller system, only the failed chiller module can be repaired or replaced, preventing the chiller system from running out for a long period of time.
9 is a flowchart illustrating a method of controlling a chiller system according to an embodiment of the present invention.
9 shows a control method of the first and second compressors constituting the first chiller set. The description of FIG. 9 can be similarly applied to the third and fourth compressors constituting the second chiller set.
Referring to FIG. 9, when the operation start command of the chiller system is inputted, the operation of the chiller system is started (S1).
When the chiller system starts to operate, the
The main control unit 340 sets one of the plurality of compressors constituting one chiller set as a main compressor and sets the other compressor as a sub compressor when the operation start command of the chiller system is inputted do. Then, the main controller 340 operates the main compressor first. In Fig. 8, it is assumed that the first compressor is a main compressor and the second compressor is a sub compressor, for example.
The main control unit 340 determines whether the operating condition of the
If the operating condition of the
When the two compressors operate, the main controller 340 controls the
The temperature control method is a method for controlling the compressor so that the cold water temperature of the cold water outflow channel (see 54 in FIG. 3) reaches the target temperature. When the
The current follow-up control method is a method of controlling the opening of the guide vane of the sub compressor by following the current of the main compressor.
The
The main control unit 340 may determine whether the sum of the current value of the
If it is determined in step S5 that the sum of the current value of the
When the sum of the current value of the
On the other hand, if it is determined in step S5 that the sum of the current value of the
If it is determined in step S7 that the sum of the current value of the
When the sum of the current value of the
On the other hand, if it is determined in step S7 that the sum of the current value of the
In the present embodiment, steps S5 to S8 are performed in the main control unit 340 or the control commands are generated. Alternatively, the
The main control unit 340 or the
In the present embodiment, the first reference value and the second reference value may be the same or different.
The reason why the reference value is used without directly comparing the current value of the second compressor with the current value of the first compressor in steps S5 and S7 of this embodiment is that the opening degree of the guide vane of the second compressor is prevented from being changed frequently .
FIG. 10 is a flowchart illustrating a control method for changing the state of a compressor according to an embodiment of the present invention. FIGS. 11 to 13 are views showing screens displayed on a first control panel according to an embodiment of the present invention. to be.
10 shows a control method for changing the state of the compressor when an alarm cause of the main compressor occurs.
Referring to FIGS. 7, 10 to 13, the operating conditions of the two compressors are satisfied, and the
Hereinafter, the
When the chiller system operates, a
The
The
In addition, the
The
The opening of the guide vane may be represented in the form of "%" for example.
The driving
In this case, the operation start order of the
The operation information may include on or off.
10, when the
That is, the occurrence of a warning cause of the
If it is determined in step S12 that the alarm cause of the
The
When the operation of the
The second compressor whose state is changed to the main compressor can be controlled by the temperature control method. That is, in this specification, it can be understood that the temperature control method is referred to as a first control method, the current follow-up control method is referred to as a second control method, and the control method is changed when a sub-compressor is changed to a main compressor.
When the second compressor is changed to the main compressor and the first compressor is changed to the sub compressor as shown in FIG. 13, the operation order of the compressor is changed in the compressor
Since the main compressor is controlled by the temperature control method, the opening degree of the guide vane of the main compressor can be frequently changed. On the other hand, since the sub compressor is controlled by following the main compressor, the number of times of change of the opening of the guide vane can be reduced.
In the case of the present embodiment, when the cause of the alarm occurs in the compressor operating as the main compressor, the control method is changed so as to operate as the sub compressor, and the control method is changed so that the sub compressor serving as the normal operation is operated as the main compressor. Deterioration of performance can be prevented.
In addition, when the cause of the alarm occurs in the compressor operating as the main compressor, frequent changes in the opening of the guide vane of the compressor causing the warning cause are prevented by changing the control method to operate with the sub compressor, The performance can be maintained at the present performance, so that the operation performance of the compressor in which the warning cause has occurred can be prevented from deteriorating.
FIG. 14 is a flowchart illustrating a control method for changing a state of a compressor according to an embodiment of the present invention, and FIG. 15 is a diagram illustrating a screen displayed on a first control panel according to an embodiment of the present invention.
14 shows a control method for changing the state of the compressor when an error cause of the main compressor occurs, for example.
Referring to FIGS. 13, 14 and 15, the operating conditions of the two compressors are satisfied, and the
Hereinafter, the
When the
While the
That is, the failure of the
If it is determined in step S22 that the cause of the failure of the
Therefore, the second compressor changed to the main compressor can be controlled by the temperature control method.
The
When the second compressor is changed to the main compressor and the first compressor is changed to the sub compressor, the operation order information and operation information of the compressor are changed in the compressor
In the operation information, the second compressor is displayed in an ON state and the first compressor is displayed in an OFF state.
According to the present embodiment, even if the main compressor is stopped due to a failure in the main compressor, the operation performance of the entire system can be minimized as the sub compressor is changed to the main compressor and operated.
10 and 14, step S12 and step S14 are collectively referred to as a step of judging whether or not the operating condition change condition of the compressor is satisfied.
When the condition for changing the operating state of the compressor is satisfied, the sub compressor is changed to the main compressor and operated.
In the above embodiment, the relationship between the first compressor and the second compressor has been described. However, the relationship between the third compressor and the fourth compressor is also applicable. That is, either the third compressor or the fourth compressor may operate as the main compressor and the other may operate as the sub-compressor.
While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.
The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.
10: Chiller system 100: Chiller module
40: cooling water circulation flow path 50: cold water circulation flow path
301: first chiller set 302: second chiller set
315: first compressor 316: second compressor
Claims (14)
A second chiller module having a second compressor; And
And a control panel for controlling the first and second chiller modules,
When the first compressor and the second compressor work together,
Wherein one of the first compressor and the second compressor operates as a main compressor and the other operates as a sub compressor,
Wherein the sub compressor is changed to a main compressor and operated when the condition change condition of the sub compressor is satisfied.
Wherein the main compressor is controlled by a first control method,
Wherein the sub compressor is controlled by a second control method.
Wherein each of the chiller modules includes an evaporator for heat exchange with cold water,
The first control method is a method of controlling the operation of the main compressor so that an outlet temperature of cold water discharged from the evaporator reaches a target temperature,
The second control method is a method of operating following the main compressor.
When the state change condition of the sub compressor is satisfied, when a warning cause of the main compressor is generated,
Wherein the compressor operating as the main compressor is changed to the sub compressor when the condition change condition of the sub compressor is satisfied.
Wherein when the condition change condition of the sub compressor is satisfied, a failure cause of the main compressor occurs and the main compressor is stopped.
Wherein the control panel includes a display unit for displaying a screen including driving order information of each compressor,
Wherein the driving order information includes priority information and operational information of each compressor.
Wherein when the cause of the warning of the main compressor is generated, the priorities of the compressors are changed and displayed in the driving order information.
Wherein warning information is displayed in an alarm generating unit of the screen when a warning cause of the main compressor occurs.
Wherein the warning information disappears from the alarm generating unit when the status change from the warning generating unit to the main compressor of the compressor operated as the sub compressor is completed.
When the main compressor is stopped, the order of the compressors operating as a sub compressor in the operation order information is changed to the first order,
And the stopped compressor is displayed in an off state in the operation information.
A starter communicating with the chiller set and capable of supplying power to the chiller set,
Each of said plurality of chiller modules comprising a compressor, a condenser and an evaporator,
The first compressor and the second compressor of the plurality of compressors are controlled by a first control method and a second control method, respectively,
Wherein the control method of the second compressor is changed from the second control method to the first control method when the condition change condition of the second compressor is satisfied.
And the first compressor is stopped when the condition change condition of the second compressor is satisfied.
Wherein the control method of the first compressor is changed from the first control method to the second control method when the condition change condition of the second compressor is satisfied.
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KR1020140109557A KR101584451B1 (en) | 2014-08-22 | 2014-08-22 | Chiller system and chiller set |
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KR1020140109557A KR101584451B1 (en) | 2014-08-22 | 2014-08-22 | Chiller system and chiller set |
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