JPH10122604A - Control device for refrigerating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately flatten actual operating time of each of chilling devices and at the same time to reduce a storage capacity. SOLUTION: Operations of a plurality of chilling devices 2a to 2d are controlled in rotation in response to the number of times of thermo-ON operations of each of the chilling devices 2a to 2d. The rotation control is performed in such a way that the chilling devices 2a to 2d having the smaller number of times of thermo-ON during a previous freezing operation are preferentially set to thermo-ON state. In addition, when a load is decreased from a state in which servant chilling devices 2b to 2d are set at thermo-ON, it is controlled to thermo-OFF state is sequence from the earlier thermo-ON set servant chilling device 2b and in turn, when the load is increased again under a state in which a master chilling device 2a is set at thermo-ON state, the thermo-ON is set from the earlier thermo-OFF servant chilling device 2b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a refrigeration system, and more particularly to a measure for controlling the operation of a plurality of chilling units.

[0002]

2. Description of the Related Art Conventionally, an air conditioner having a chilling unit includes a compressor, a four-way switching valve, a heat source heat exchanger, an electric expansion, as disclosed in Japanese Patent Application Laid-Open No. 7-55206. There is a type in which a valve and a use-side heat exchanger are sequentially connected. Then, a water system is connected to the use side heat exchanger to generate conditioned water such as cold water or hot water, and the conditioned water is circulated to a fan coil unit or the like.

[0003]

In the above-mentioned air conditioner, it is necessary to perform leveling control for leveling the actual operation time of the compressor in a plurality of chilling units. Was not done correctly.

More specifically, in the above air conditioner, for example, as shown in FIG. 24, a plurality of chilling units (b,...) Are connected to a water system (a), while each of the chilling units (b) is connected. ,...) Are connected to the controller (c). The controller (c)
The CPU (d) has an output unit (e) and an input unit (f),
The operation unit (g) and the display unit (h) are connected to each other. The output section (e) of the controller (c) is connected to the operating contact (i) and the stopping contact (j) of each chilling unit (b,...), And the input section (f) has an abnormal The contact (k) is connected, and a temperature signal (m) is input from the outlet temperature sensor.

In the above air conditioner, since the operation signal and the stop signal of each chilling unit (b,...) Are transmitted as analog signals, the output section (e) of the controller (c) and each chilling unit (b,. ..) Are connected to two signal lines (n, n).
..), And the input section (f) and the abnormal contact (k) are connected by two signal lines (n,...).

Therefore, in this case, since the controller (c) obtains only the operation time information from the operation signal and the stop signal of each chilling unit (b,...), The chilling units (b, ..) Are sequentially started, and the operation time of the chilling units (b,...) Is leveled.

However, in this case, the operation time includes a thermo-off state in which the compressor is stopped.
In some cases, the operation of the compressor is biased toward a specific chilling unit (b,...), And it is difficult to say that the actual operation time of the chilling unit (b,...) Has been accurately leveled.

Further, since the operation time is simply counted, there is a problem that the memory capacity is increased and the control element itself is enlarged.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to accurately equalize the actual operation time of each chilling unit and to reduce the storage capacity. is there.

[0010]

[Means for Solving the Problems]

-Summary of the Invention- In the present invention, the rotation of the operation of a plurality of chilling units (2a to 2d) is controlled based on the number of times of thermo-on of each chilling unit (2a to 2d). Rotation control is
The chilling units (2a to 2d), which have a small number of times of thermo-on during the refrigeration operation up to the previous time, are preferentially thermo-oned. Further, when the load decreases from the state where the chilling units (2b to 2d) of the slave units are thermo-on, the chilling unit (2b) of the slave unit which has been thermo-on is controlled to be in the thermo-off state in order, while the chilling unit of the master unit. If the load increases again while (2a) is thermo-on, the chilling unit (2b) of the sub-unit that was previously thermo-off
More thermo on.

-Specific Items of the Invention- Specifically, as shown in FIG. 1, means taken by the invention according to claim 1 is to adjust the conditioned liquid flowing through the liquid system (30) to a predetermined temperature. A plurality of chilling units (2a to 2d) for performing the freezing operation are connected to the liquid system (30). Furthermore, the chilling unit (2a
2d) based on the thermo-on state where the compressor is driving and the thermo-off state where the compressor is stopped,
During each freezing operation of the chilling units (2a to 2d), each chilling unit (2a to 2d) during the previous freezing operation
The chilling unit (2a) having the smallest judgment value based on the number of times of thermo-on is set as the master unit, and the other chilling units (2b to 2d) are set as slave units, and the master unit is preferentially thermo-on each time the operation is started. A leveling means (52) for controlling the state to the state and activating the child units in ascending order of the determination value based on the number of times of thermo-on is provided.

According to the first aspect of the present invention, the leveling means (52) is based on the thermo-on state and the thermo-off state of the chilling units (2a to 2d).
However, during each refrigeration operation, the operation of each chilling unit (2a to 2d) is rotation-controlled, and the chilling unit ( 2a-2
Set d) as the master unit, and set another chilling unit (2
Set a to 2d) for the slave unit. And leveling means (52)
The operation control means (5) controls the main unit preferentially to be in the thermo-on state each time the operation is started, and starts the sub-units in descending order of the determination value based on the number of times of thermo-on according to the load.
1) Outputs the thermo-on control sequence signal. As a result, the actual operation time of each chilling unit (2a to 2d) is substantially equalized.

According to a second aspect of the present invention, in the first aspect of the present invention, when the load decreases from a state in which the slave unit is in a thermo-on state, the leveling means (52) may be configured to perform the first thermo-on state in the slave unit. While the thermostat is controlled in order from the machine, when the load increases again in a state where the thermostat of the master machine is on, the slave machine which has been thermostated off is turned on.

According to the second aspect of the present invention, when the load decreases during the refrigeration operation, the slave units that have been thermo-on are controlled to be in the thermo-off state in order, and conversely, when the load increases again, The leveling means (52) outputs a thermo-on / off control sequence signal to the operation control means (51) so that the slave which has been previously thermo-off is thermo-on. As a result, the chilling units (2a-2
The bias of the compressor in d) is prevented.

According to a third aspect of the present invention, in the first aspect of the present invention, when the load during the refrigeration operation is reduced, the leveling means (52) may be configured such that the chilling units (2b to 2d) which have been thermo-on first are turned on. ), The thermo-off state is controlled in order, and when the load increases again, the chilling units (2b to 2d), which have been thermo-off first, are thermo-on.

According to the third aspect of the present invention, the operating time of the compressor of each chilling unit (2a to 2d) is equalized during each refrigeration operation.

According to a fourth aspect of the present invention, in the first aspect of the present invention, a correction signal for increasing and increasing the number of times of thermo-on in accordance with the duration of the thermo-on state is output to the leveling means (52). Means (53).

According to the fourth aspect of the present invention, when the chilling units (2a to 2d) are continuously in the thermo-on state, the correcting means (53) increases the number of times of thermo-on. . As a result, the operation time of the compressor in the chilling units (2a to 2d) is reflected in the number of times of thermo-on.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the leveling means (52) derives a determination value based on a difference between the number of times of thermo-on during the previous refrigeration operation. Configuration.

According to the fifth aspect of the present invention, since the leveling means (52) uses the difference in the number of times of thermo-on, an increase in the memory capacity is prevented.

The measures taken by the invention according to claim 6 are the same as those of the above-mentioned claim 1 except that each chilling unit (2a to 2a)
d) has a configuration provided with a capacity control means (27) for independently performing capacity control so that the outlet temperature of the conditioning liquid becomes a predetermined temperature.

According to the invention, the capacity control means (27) of each of the chilling units (2a to 2d) has a capacity control function so that the outlet temperature of the conditioned liquid flowing out becomes a predetermined temperature. Control is performed, and the operating time of the compressor of each of the chilling units (2a to 2d) is leveled by the leveling means (52).

[0023]

Therefore, according to the first aspect of the present invention, the chilling unit (2a
2d), the operation time of each chilling unit (2a to 2d) can be reliably leveled. In particular, since the master unit and the like are determined by the number of times of thermo-on, the actual operation time of the compressor can be reflected, so that leveling can be accurately performed.

Further, since the number of times of thermo-on is counted, the memory capacity can be reduced as compared with the case where the thermo-on time is counted, so that the control element can be downsized. Can be stored, so that the control system can be improved.

According to the second aspect of the present invention, during each refrigeration operation, the chilling units (2a to 2d) that thermo-off in the order of thermo-on are determined, while the chilling units (2a to 2d) that thermo-on in the order of thermo-off are determined. As a result, the operation of each chilling unit (2a to 2d) can be rotated based on the actual operation time of the compressor, and the actual operation time of each chilling unit (2a to 2d) can be substantially leveled. It can be achieved reliably.

According to the third aspect of the present invention, the operation time of the compressor of each chilling unit (2a to 2d) can be leveled during each refrigeration operation, so that more accurate leveling control can be performed. It can be carried out.

According to the fourth aspect of the present invention, the number of times of thermo-on is corrected based on the thermo-on time of the chilling units (2a to 2d). About 2d)
Since this operation time can be accurately reflected on the number of times of thermo-on, the compressor can be leveled more accurately.

According to the fifth aspect of the present invention, since the base unit and the like are determined based on the difference between the number of times of thermo-on, the memory capacity can be reduced as compared with storing the number of times of thermo-on itself.

According to the sixth aspect of the invention, even when each of the chilling units (2a to 2d) independently performs the capacity control, the master unit and the like are determined by the number of times of the thermo-on, so that the actual operation of the compressor is performed. Time can be leveled.

[0030]

Embodiment 1 Hereinafter, Embodiment 1 of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 2, the refrigeration system (10)
An air conditioner including two chilling units (2a to 2d) is configured to perform air conditioning operation for cooling or heating as a freezing operation to air-condition a room.

Although not shown, the chilling units (2a to 2d) each include a compressor, a four-way switching valve, a heat source heat exchanger, a temperature-sensitive expansion valve, an expansion mechanism including a capillary tube, and a utilization side heat exchanger. Are connected in order. The use-side heat exchanger is connected to the water system (30), which is a liquid system, and generates conditioned water, that is, cold water or hot water.

The water system (30) includes a forward pipe (31) and a return pipe (32), and the forward pipe (31) and the return pipe (32) are branched pipes into the respective chilling units (2a to 2d). (33, 34, ...). Although not shown, the outward pipe (31) and the return pipe (32) are extended indoors.
Connected to indoor units such as fan coil units,
In the indoor unit, the conditioned water generated in the use side heat exchanger circulates to cool or heat the room.

Furthermore, each chilling unit (2a) is connected to each branch pipe (34, 34,...) On the return path side in the water system (30).
~ 2d) is provided with a circulation pump (35),
As shown in FIG. 4, each branch pipe (34, 34,...) On the return path is provided with an inlet temperature sensor (11), and each branch pipe (33, 3
, 3) are provided with outlet temperature sensors (12), respectively. The inlet temperature sensor (11) and the outlet temperature sensor (12) are integrated into the casings of the chilling units (2a to 2d). The inlet temperature sensor (11)
Constitutes an inlet temperature detecting means for detecting an inlet water temperature which is an inlet temperature of conditioned water flowing into the chilling units (2a to 2d), and an outlet temperature sensor (12) flows out of each chilling unit (2a to 2d). The outlet temperature detecting means detects the outlet water temperature which is the outlet temperature of the conditioned water.

On the other hand, each of the chilling units (2a to 2d)
Is a feature of the present invention, as shown in FIGS.
One remote controller (50) is connected via a communication line (40), and a data network (41) for performing data transmission by bidirectional serial transmission is provided between each of the chilling units (2a to 2d) and the control unit. ) Is configured. The connection topology of the communication line (40) adopts a point-to-point tree format, and the chilling units (2a to 2d) as nodes are sequentially connected in a hierarchical relationship.

The communication line (40) is composed of two signal lines, a positive signal line and a negative signal line, and is a transmission system between each chilling unit (2a-2d) and the remote controller (50). Has adopted the balanced communication method in the AMI communication method,
It is configured to perform half-duplex signal transmission with a preset polarity. In addition, the polarity of the positive signal line and the negative signal line is automatically detected, and it is not necessary to set the polarity when connecting the wiring.

The one chilling unit (2a) includes:
The central control line (42) is connected. That is, FIG.
Shows four chilling units (2a to 2d), but the four chilling units (2a to 2d)
Although not shown, when a plurality of groups are provided, each group is connected by a centralized control line (42), and a centralized controller or the like is connected to the centralized control line (42). Will be.

In the present embodiment, the one group is composed of four chilling units (2a to 2d) as shown in FIGS. 2 and 3, but may be five or more. A maximum of 16 chilling units (2a, 2b,...) May be configured.
a, 2b,...) may be connected by one communication line (40).

The remote controller (50) is provided for each group and constitutes a control unit for controlling each of the chilling units (2a to 2d). As shown in FIG. 5, the remote control (50) has a display panel (60) and an operation panel (70). The display panel (60) has an operation button (61) and an operation display lamp (62). ) Are provided. The display panel (60) is provided with a first display section (6a) to a fourth display section (6d). The first display unit (6a) is arranged at the upper stage and lights up “Centralized management” or the like, and the second display unit (6a).
b) is arranged on the left side and displays “unit number”, “group number”, etc. in eight segments, and a third display section (6
c) is located in the center "outlet temperature" or "high pressure"
And the like are displayed in eight segments, and the fourth display section (6d) is disposed on the left side and lights up such as "Rotating operation" and "During demand control".

The operation panel (70) includes an operation mode switch (7a) for switching operation modes, a demand control switch (7b) for performing demand control, and a defrost interval reduction for changing a defrost interval. Switch (7c), setting mode switch (7d) for switching the setting mode,
Heat storage normal switch (7e) for switching between heat storage operation and normal operation, temperature control switch (7f) for temperature control, unit number switch (7g) for switching unit numbers, and each display section (6a to 6d) ), A display changeover switch (7h) for changing the display, a setting release switch (7i) for performing on-site settings, etc., an inspection adjustment switch (7j) for performing inspections, etc., and a forced forcibly turning on the fan. A fan switch (7k) is provided.

The third display section (6c) displays the inlet water temperature and the outlet water temperature of the conditioned water received from the inlet temperature sensor (11) and the outlet temperature sensor (12) of each chilling unit (2a to 2d). I do.

Each of the chilling units (2a to 2d) is provided with a controller (21) as shown in FIG. 4, and the controller (21) is connected to a remote controller (5) via a transmission unit (22).
0). The controller (21) outputs control signals to various solenoid valves (23), a compressor (24) and a fan (25), while temperature data from an inlet temperature sensor (11) and an outlet temperature sensor (12) are output. As well as
A detection signal is input from a sensor such as a pressure (26).
Further, the controller (21) includes a capability control means (2
7) is provided, and the capacity control means (27) is provided with a water system (3).
Refrigeration operation capacity control is performed according to the load of 0). In other words, each chilling unit (2a to 2d) independently sets the outlet water temperature of the conditioned water flowing out to a predetermined temperature based on the temperature data of the inlet temperature sensor (11) and the outlet temperature sensor (12). To control the driving ability.

Specifically, the chilling units (2a to 2a)
d), the driving capacity is adjusted to four stages of 0%, 40%, 70%, and 100%, and each chilling unit (2a to 2d) is
During an air-conditioning operation for generating cold water or hot water, the compressor can be switched between a thermo-on state in which the compressor is driven and a thermo-off state in which the compressor is stopped. The chilling units (2a to 2d) have a driving capacity of 0.
% Is in the thermo-off state, and in the thermo-on state, the operating capacity changes to 40%, 70%, and 100%.

The above-mentioned thermo-off means that the water system (3
0) Temperature of conditioned water circulating (outlet water temperature or outlet water temperature)
Refers to a state in which the compressor is stopped with a load represented by the following or less than a predetermined value. Thermo-on means that the load represented by the temperature of the conditioned water circulating in the water system (30) is larger than a predetermined value and the compressor is stopped. Refers to the state of driving.

Further, each of the above chilling units (2a to 2d)
Is configured to store the number of times of thermo-on for each air-conditioning operation and output a data signal of the number of times of thermo-on to the communication line (40).

The remote controller (50) is provided with operation control means (51) for each chilling unit (2a to 2d), and as a feature of the present invention, each chilling unit (2a to 2d).
Means (52) for d) actual operation time of the compressor are provided.

The operation control means (51) transmits and receives control data to and from each of the chilling units (2a to 2d) via the communication line (40), and controls each of the chilling units (2a to 2d).
Is configured to perform state control. In other words, the operation control means (51) controls each of the chilling units (2a to 2d)
Receiving the temperature data of the inlet temperature sensor (11) and the outlet temperature sensor (12) of each of the chilling units (2a) so that the outlet water temperature of the conditioned water flowing out of each of the chilling units (2a to 2d) becomes a predetermined temperature. Control the number of operating units up to 2d).

Specifically, the operation control means (51) permits the operation of a predetermined number of chilling units (2a,...) Based on the outlet water temperature of the conditioned water during the refrigeration operation, and controls the operation to the operation permission state. , Outputs a forced thermo-off signal for prohibiting the operation of the other chilling units (2d,...), And controls the operation to the operation prohibited state (forced thermo-off state). The operation control means (51) further includes a chilling unit (2a,
…) Only one of the units is capable of variable capability (27)
If the chilling unit (2b,...) In another permitted state exists, the thermo-on is performed so as to fix the chilling unit (2b,...) To the maximum capacity. Outputs a signal and controls to fixed capacity state (forced thermo-on state).

The leveling means (52), based on the data signal of the number of times of thermo-on from each chilling unit (2a-2d), performs each air-conditioning operation, and each chilling unit (2a-2d) in the previous air-conditioning operation. The chilling unit (2a to 2d) having the smallest judgment value based on the number of times of thermo-on is set as the master unit, and the other chilling units (2a to 2d) are set.
Is set to the slave unit, and the master unit is preferentially controlled to be in the thermo-on state every time the operation is started, while the operation control means (5
1) Outputs the thermo-on control sequence signal.

Further, when the load is reduced from the state where the chilling units (2b to 2d) of the slave units are thermo-on, the leveling means (52) sets the chilling units (2b to 2d) of the slave units that have been thermo-on earlier. While the load is increased again while the chilling unit (2a) of the master unit is in the thermo-on state, the thermo unit is thermo-on from the chilling unit (2b to 2d) of the slave unit in which the thermo-off is performed first.
Operation control means (51) so as to control the chilling unit (2a) of the master unit to a forced thermo-on state (capacity fixed state).
To output a thermo-on / off control sequence signal.

That is, the leveling means (52) rotates the thermo-on state of each chilling unit (2a-2d) so as to level the actual operating time of the compressor in the four chilling units (2a-2d). Like that.

The leveling means (52) derives a judgment value based on the difference between the number of times of thermo-on during the previous air conditioning operation.

Operation of Refrigeration Unit (10) Next, the operation of each chilling unit (2a to 2d) in the refrigeration unit (10) will be described with reference to the timing charts of FIGS. 6 to 8 and FIGS. Will be described based on the transmission sequence diagram of FIG.

First, the remote controller (50) and each of the chilling units (2a to 2d) perform bidirectional data transmission via the communication line (40) to control the operation state of each of the chilling units (2a to 2d). . Therefore, the chilling unit (2a ~
The control operation 2d) will be described with reference to the transmission sequence diagrams of FIGS.

In step ST1 in FIGS. 9 to 12, when the power of each chilling unit (2a to 2d) is turned on, the remote controller (50) is supplied with power from one chilling unit (2a) in one group and communicates. Data transmission will be performed via the line (40). Steps
In ST2, an auto-tuning process is performed, and a unit number as a communication address is automatically set in each of the chilling units (2a to 2d). That is, a master unit and a slave unit for performing remote control group control for communication are set in each chilling unit (2a to 2d). The master unit and the slave unit for the remote control group control are different from the master unit and the slave unit for the rotation control described later.

Thereafter, the process proceeds to step ST3, in which the remote controller (50) collects information of each device. Specifically, the remote controller (50) operates the circulating pump (35) by each chilling unit (2a).
チ 2d) outputs a request signal for specification data such as whether it is individually set, and each chilling unit (2a〜2d) returns the specification data.

During the first air-conditioning operation, the remote controller (50) transmits setting signals for the above-mentioned master unit and slave unit for remote control group control to the respective chilling units (2a to 2d), and the respective chilling units (2a to 2d). 2d) returns the parent-child data to the remote control (50). For example, during the first air-conditioning operation, the remote controller (50) sets the chilling unit (2a) with the youngest unit number as the master unit, sets the other chilling units (2b to 2d) as slave units, and sets the unit number as the unit number. The settings are sequentially set from the first slave unit to the third slave unit.

Next, the above all chilling units (2a to 2d)
Output the compulsory thermo-off signal to all the chilling units (2a to 2d) and disable the operation, while all the chilling units (2a to 2d) return the reply data to the remote control (50) after receiving the compulsory thermo-off signal I do.

After the above-described information collection is performed and the initial transmission process is completed in step ST4, the process proceeds to step ST5.
And rotation control is started. That is, the remote controller (50) transmits a master device setting signal indicating which chilling unit (2a to 2d) is the master device for rotation control to all chilling units (2a to 2d), (2a to 2d) return the setting data to the remote controller (50).

Then, the process proceeds to step ST6, in which the remote controller (50) transmits a request signal of the outlet water temperature to each of the chilling units (2a to 2d), by executing a periodic rotation process.
Each chilling unit (2a to 2d) returns the temperature data of the outlet water temperature to the remote controller (50). Thereafter, a request for the outlet water temperature data is made every 60 seconds, and each chilling unit (2a to 2d) transmits the outlet water temperature data to the remote controller (50).

After executing each of the above-described processes, the process proceeds to step ST7, where a process for performing an air-conditioning operation is performed. When the operation button (61) is pressed, the remote controller (50) transmits an operation command signal to all the chilling units (2a to 2d), and each chilling unit (2a to 2d) transmits a reception signal of the operation command to the remote controller (2a to 2d). Reply to 50). The remote controller (50) transmits a forced thermo-off release command signal to the chilling unit (2a) of the base unit, and the chilling unit (2a) of the base unit receives a signal for accepting the forced thermo-off release command by the remote control (50). Reply to. Since the forced thermo-off keeps the thermo-off state so that each of the chilling units (2a to 2d) does not independently start operation, the forced thermo-off is first released.

Next, the process proceeds to step ST8, and when the thermo-on control is performed, the following processing is executed. Remote control (50)
Transmits a request signal of the conditioned water outlet water temperature to each chilling unit (2a-2d), and the chilling units (2a-2d) return the outlet water temperature data to the remote control (50) (60).
periodic processing every sec).

At least one chilling unit (2a)
When the load increases and the other chilling units (2b to 2d) are thermo-on while the thermo-on is on, the remote controller (50) sends a compulsory thermo-on command signal to the currently thermo-chilled chilling unit (2a). Then, the chilling unit (2a) that is thermo-on returns a forced thermo-on acceptance signal to the remote control (50). Since the forced thermo-on is for holding the chilling units (2a to 2d) at full load (operating capacity 100%), capacity control such as load down is prohibited.

The remote controller (50) transmits a compulsory thermo-off release command signal to the chilling unit (2b) to be thermo-on from now on, and this chilling unit (2b)
Returns a signal for accepting the command to cancel the forced thermo-off to the remote controller (50), and enters the capability variable state to execute the capability control.

On the other hand, when the process proceeds to step ST9 and the thermo-off control is performed, the following processing is executed. Remote control (50)
Sends a request signal for the outlet water temperature to each chilling unit (2a to 2d), and each chilling unit (2a to 2d) returns temperature data of the outlet water temperature to the remote control (50).

When the load decreases and the chilling units (2a to 2d) are thermo-off (operation prohibited state),
The remote controller (50) sends a command signal for forced thermo-off to the chilling unit (2d) for thermo-off, and the chilling unit (2d) for thermo-off returns a reception signal for forced thermo-off to the remote controller (50).

When only the chilling unit (2a) of the master unit is in the thermo-on state, the chilling unit (2a) of the master unit performs its own capacity control. , Thermo-off (capability 0
%) And thermo-on (capacity 40% or more).

Thereafter, the process proceeds to step ST10, and when the air conditioning operation is to be stopped, the following processing is executed. When the operation button (61) is pressed, the remote controller (50) transmits an operation stop signal to each chilling unit (2a to 2d), and each chilling unit (2a to 2d) receives an operation stop signal from the remote controller (50). Reply the signal to the remote control (50).

The remote controller (50) transmits a forced thermo-off command signal to all the chilling units (2a to 2d), and the all chilling units (2a to 2d) transmit a forced thermo-off acceptance signal to the remote controller (50). Reply to step ST
At 11, an air-conditioning operation stop process is performed.

When one air conditioning operation is completed by stopping the air conditioning operation and the operation button (61) is pressed again to perform the air conditioning operation, the operation from step ST1 is performed.

The air-conditioning operation for generating the chilled water during the cooling operation will be described in detail with reference to the timing charts of FIGS.
FIGS. 6 to 8 show that the capacity 10 is selected from the driving permission state.
Forced thermo-on state fixed to 0% (capacity fixed state)
Is indicated by X, the capacity variable state is indicated by Y, and the forced thermo-off state in which the operation is prohibited (operation prohibited state) is indicated by Z.

First, at the time of the first air conditioning operation, the master unit and the slave unit for the rotation control are set based on the unit number as the address, and the chilling unit (2a) of unit number 1 as the first unit is set as the master unit. The chilling unit (2b) of the unit number 2 as the second unit is the first slave unit, and the chilling unit (2c) of the unit number 3 as the third unit is the second slave unit and the chilling unit (4) of the fourth unit is unit number 4. The unit (2d) is set in each of the third slave units, and the drive order is set in the order of the first slave unit, the second slave unit, and the third slave unit from the master unit. In addition, in the timing charts of FIGS. 6 to 8, circled symbols indicate the number of times of thermo-on.

In A1, when the air-conditioning operation at the time of cooling is started, first, when the load is large, the chilling unit (2a) of the master unit is turned on and the operating capacity is increased with the load based on the outlet water temperature. From 40% to 100%
To increase. If the chilling unit (2a) of the master unit is in a full load state and the full load state continues until a predetermined time has elapsed, and the load is large and the outlet water temperature does not drop to the predetermined temperature, the capacity Is insufficient, the first slave unit is turned on at A2. At that time, forcible thermo-on is set for the chilling unit (2a) of the master unit, and the chilling unit (2a) is fixed to the full load state.

Thereafter, the chilling unit (2
b) When the load increases, the operating capacity is increased from 40% to 100% based on the outlet water temperature, and a full load state is established. This full load state continues until a predetermined time elapses, and the load is increased. When the temperature is large and the outlet water temperature does not drop to the predetermined temperature, the capacity is insufficient, and the chilling unit (2c) of the second slave unit is thermo-on at A3. At that time, the forced chill-on of the chilling unit (2b) of the first slave unit is set, and the chilling unit (2b) is fixed to the full load state.

Further, the chilling unit (2c) of the second slave unit
Will increase operating capacity by 4 based on outlet water temperature when load increases.
It increases from 0% to 100% and becomes full load state,
This full load state continues until a predetermined time elapses,
In addition, when the load is large and the outlet water temperature does not drop to the predetermined temperature, the capacity is insufficient, so that the chilling unit (2d) of the third slave unit is thermo-on in A4. At that time, the chilling unit (2c) of the second slave unit is set to the forced thermo-on state and is fixed at the full load state.

In this state, only the chilling unit (2d) of the third slave unit is in a state where the driving ability can be controlled (variable capacity state). When the chilling unit (2d) of the third slave unit is set to a full load with the operation capacity set to 100%, the entire device is in a full load state. Thereafter, when the load is reduced and the chilling unit (2d) of the third slave unit is reduced in load when the outlet water temperature is reduced, and further, when the outlet water temperature is low even when the operation capacity is reduced to 40%, the chilling unit (2d) performs the processing in A5 The chilling unit (2d) of the third slave unit is turned off.

When the thermo-off state of the chilling unit (2d) of the third slave unit continues for a predetermined time and the outlet water temperature is low, the chilling unit (2b) of the first slave unit is thermo-off at A6. . In other words, when reducing the driving capability of the entire apparatus, the thermostat is turned off from the chilling unit (2b) of the slave unit that has been thermostated first, the forced thermostat is set, and the thermostat is fixed to the thermostat off state (driving prohibited state).

Thereafter, when the load rises again, only the chilling unit (2d) of the third slave unit is in a state where only the chilling unit (2d) of the third slave unit can control the driving ability, and therefore, the chilling unit (2d) of the third slave unit turns on. Control the outlet water temperature.

Then, the chilling unit (2) of the first slave unit
b) In the thermo-off state, the load decreases, and in A7,
The chilling unit (2d) of the third slave unit is thermo-offed. If this thermo-off state continues for a predetermined time and the outlet water temperature is low, the chilling unit (2c) of the second slave unit is thermo-off at A8. . In other words, in this case, the chilling unit (2c) of the slave unit that has been secondly thermostated is thermostated off, the forced thermostat is set, and the thermostat is fixed to the thermostat off state (driving prohibited state).

Thereafter, when the load rises again, since only the chilling unit (2d) of the third slave unit is in a state where the operating capacity can be controlled at present, the chilling unit (2d) of the third slave unit turns on. Control the outlet water temperature.

When the chilling units (2b, 2c) of the first and second slave units are in the thermo-off state, the load decreases,
In A9, the chilling unit (2d) of the third slave unit is thermo-offed. If this thermo-off state continues for a predetermined time and the outlet water temperature is low, the chilling unit (2d) of the third slave unit is forcibly forced in A10. When the thermo-off is set, the forced thermo-on of the chilling unit (2a) of the master unit is released, and the chilling unit (2a) of the master unit is brought into a state in which the operation ability can be controlled. Then, in this state, when the outlet water temperature is low, the chilling unit (2a) of the parent machine thermo-offs.

Thereafter, when the load rises again, the chilling unit (2a) of the master unit thermo-ons, the chilling unit (2a) of the master unit increases the operating capacity, and the full load state continues for a predetermined time. When the load increases, the chilling unit (2b) of the first slave unit is thermo-on at A11. That is, when the driving ability is increased again, the chilling unit (2b) of the slave unit which has been thermostated off and is in the operation prohibition state is thermo-on to control the outlet water temperature.

When the load decreases and the outlet water temperature is low while the chilling unit (2b) of the first slave unit is controlling the capacity, the chilling unit (2b) of the first slave unit is thermo-off at A12 when the outlet water temperature is low. . When the thermo-off state of the chilling unit (2b) of the first slave unit continues for a predetermined time, in A13, forced chilling is set to the chilling unit (2b) of the first slave unit, and the chilling unit (2a) of the master unit is set. Is released, so that the chilling unit (2a) of the master unit can control the driving ability. Note that when canceling the forced thermo-on of the chilling unit (2a) of the master unit, a determination time twice as long as that of the case of A10 is set in consideration of a change in load, and the chilling unit of the first slave unit ( When the thermo-off state of 2b) is continued (added) for a predetermined time, the forced thermo-on is released.

Thereafter, when the load rises again, the chilling unit (2a) of the master unit turns on and the chilling unit (2a) of the master unit continuously operates in a full load state for a predetermined time, and the load is reduced. When it increases, in A14, the chilling unit (2c) of the second child device turns on. That is, the chilling unit (2a) of the master unit is in the forced thermo-on state, and the chilling unit (2c) of the second slave unit is turned on.
Performs capacity control. At this time, of the chilling units (2b to 2d) that have been thermo-off, the chilling unit (2c) that has been thermo-off for the longest time, and the chilling unit (2c) of the slave unit that has been thermo-offed second is thermo-on. Control outlet water temperature.

Then, when the operation stop signal is input thereafter, in A15, the chilling units (2a, 2c) of the master unit and the second slave unit are thermo-off and the respective chilling units (2a to 2d) are forcibly thermo-off. And again,
When an operation command is input, the above operation is repeated.

Therefore, each chilling unit (2b
The criterion in the number control of 2d) will be described with reference to FIGS.

As shown in FIG. 13, for example, when the circulation pumps (35) are provided corresponding to the three chilling units (2a to 2c), respectively, the chilling unit (3) in the operation permission state is provided. 2a,…) Outlet water temperature Tho1,…, average temperature Th
oa is used as a criterion. Specifically, when the two chilling units (2a, 2b) are in the operation permission state, Thoa = (Tho1 + Tho2) / 2 as shown in the equation, and the two chilling units (2a, 2b) are obtained. The average temperature Thoa is obtained from the outlet water temperatures Tho1 and Tho2.

As shown in FIG. 14, unit control is performed by comparing the average temperature Thoa with the set value, and the differential DEF in this case is set to 1 ° C. Specifically, the first chilling unit (2a) is operated at 100% capacity for 10 minutes, and at this time, if the average temperature Thoa (= Tho1) is higher than the set value by 1 ° C., the second chilling unit (2a) Set 2b) to the operation permission state and turn on the thermo.

The second chilling unit (2b) was operated at 100% capacity for 10 minutes, at which point the average temperature Thoa
When (= (Tho1 + Tho2) / 2) is higher than the set value by 1 ° C., the third chilling unit (2c) is set in the operation permission state and turned on.

Conversely, the third chilling unit (2c), which was thermo-on lastly, was thermo-off and the average temperature Thoa (=
When (Tho1 + Tho2 + Tho3) / 3) is lower than the set value by 1 ° C., the operation of the second chilling unit (2b) is prohibited as described above.

As shown in FIG. 15, for example, when one circulating pump (35) is provided for three chilling units (2a to 2c), the average temperature Thoa is expressed by the following equation. Then, Thoa = (Tho1 + Tho2 + Tho3) / 3 is obtained, and the average temperature Thoa is always obtained from the outlet water temperatures Tho1 to Tho3 of the three chilling units (2a to 2c). Based on the average temperature Thoa, the number of operating units is controlled as described above.

-Rotation Control- Next, rotation control for setting the first, second and third slave units in addition to the master unit will be described.

This rotation control is executed when each air-conditioning operation is started, that is, when the operation button (61) is pressed, and the judgment value is determined based on the difference in the number of times of thermo-on during the air-conditioning operation so far. Is derived.

Specifically, the results are as shown in Table 1. Table 1 uses the number of times of thermo-on in the timing charts of FIGS.

[Table 1]

That is, as shown in Table 1 (a), during the first air conditioning operation, all the chilling units (2a to 2d)
Is zero, the master unit, the first slave unit, the second slave unit, and the third slave unit are set in the order of the unit number which is the address of each chilling unit (2a to 2d). In this case, the above-described air-conditioning operation is executed based on the parent device and the child device of the remote control group control.

Then, at the time of the second air conditioning operation, Table 1
As shown in (b), the thermo-on count A this time, that is,
The number of times of thermo-on during the first operation is
2d), the leveling means (52) of the remote controller (50) determines the parent device or the like based on the difference in the number of times of thermo-on. Since the previous difference number B does not exist at the present time, the values of all the chilling units (2a to 2d) become zero, and as shown in Table 1 (b), the cumulative difference number C is obtained. The number of times Cmax is obtained, and the number of times of difference D this time, which is the number of times of difference during the first operation, is obtained.

On the basis of this difference number D, during the current air-conditioning operation, the chilling unit (2c) of unit number 3, which is the third unit, becomes the parent unit, and the chilling unit (2a) of unit number 1, which is the first unit. The chilling unit (2d) of the unit number 4, which is the fourth unit, is set to the second child unit, and the chilling unit (2c) of the unit number 2, which is the second unit, is set to the third child unit. Then, the above-described air-conditioning operation is performed based on the master device and the like.

Subsequently, at the time of the third air conditioning operation, Table 1
As shown in (c), the thermo-on count A this time, that is,
The cumulative difference count C is determined from the thermo-on count A during the second air-conditioning operation and the previous difference count D (see Table 1 (b)), which is the previous difference count B, and the maximum difference count Cmax is determined by 2 The current difference number D, which is the difference number during the second air conditioning operation, is obtained.

On the basis of this difference number D, during the current air conditioning operation, the chilling unit (2d) of unit number 4 which is the fourth unit is the master unit, and the chilling unit (2c) of unit number 3 which is the third unit is the unit. The chilling unit (2a) of the unit number 1 as the first slave unit is set to the second slave unit, and the chilling unit (2b) of the unit number 2 as the second slave unit is set to the third slave unit. Then, the above-described air-conditioning operation is performed based on the master device and the like.

Based on the above-described rotation control, each master unit and the like are set, and the air conditioning operation is executed.

-Irregular Processing-FIGS. 16 and 17 show rotation control when one chilling unit (2a to 2d) leaves. For example, as shown in FIG. 16, when the chilling unit (2a) of the master unit is removed for maintenance or the like, the chilling unit (2b) of the first slave unit becomes the master unit, and the chilling units (2c) of the other slave units are used. , 2d) in turn. Then, the above-described rotation control is performed between the chilling units (2b to 2d).

As shown in FIG. 16, for example, the second
When the chilling unit (2c) of the slave unit is removed, the chilling units (2d) of the third and subsequent slave units are sequentially moved up. Then, each chilling unit (2a, 2b, 2
The rotation control described above is performed during d).

The chilling unit (2a)
When 2d) returns, the rotation control is added from the next air-conditioning operation. At this time, the chilling units (2a to 2d) perform the above-described rotation based on the number of times of thermo-on during the previous air-conditioning operation. Execute control.

-Control of Defrosting Operation- The remote controller (50) is provided with a defrost control means (54) for each of the chilling units (2a to 2d) as a feature of the present invention. The defrost control means (54), when receiving a request for the defrost operation from each chilling unit (2a,...), Sets a predetermined number of chilling units (2a).
Only a predetermined number of chilling units (2a) output a defrost permission signal so that only the chilling unit (2a) performs the defrost operation at the same time. The predetermined number of chilling units (2a,...)
Is set according to the number of connected devices.

For example, as shown in FIG. 2, when four chilling units (2a to 2d) are connected, the predetermined number of defrost operations is set to one for up to four chilling units.
If 5 to 8 chilling units (2a, ...) are connected, set to 2 units, and if 9 to 12 chilling units (2a, ...) are connected, 3 units 13 to 16 chilling units (2
a, ...) are connected, the number is set to four. That is, if a large number of chilling units (2a,...) Simultaneously execute the defrost operation, the water temperature of the water system (30) decreases. Therefore, the defrost operation is executed every predetermined number.

The control of the defrost operation during the heating operation will be described with reference to the transmission sequence diagram of FIG.

First, each chilling unit (2a to 2d)
For example, a defrost request signal is output to the remote controller (50) based on the outside air temperature, the heat exchange temperature of the heat source side heat exchanger, and the like. Remote control (50) that received this defrost request signal
Determines whether the number of possible defrost operations has been reached. In this embodiment, since four chilling units (2a to 2d) are provided, only one chilling unit can perform the defrost operation.

If the remote controller (50) does not output the defrost permission signal to any of the chilling units (2a to 2d), the remote controller (50) transmits the defrost request signal to the chilling unit (2a) that has output the defrost request signal. A signal is output, and a defrost inhibition signal is output to the other chilling units (2b to 2d).

The chilling unit (2a) having output the defrost request signal executes the defrost operation and outputs a defrost execution signal indicating the execution of the defrost operation to the remote controller (50).

Thereafter, the chilling unit (2a) that has performed the defrost outputs a defrost end signal to the remote controller (50) when the defrost operation ends. The remote controller (50) outputs a defrost permission signal to all chilling units (2a to 2d). When it is necessary to perform the defrost operation, all the chilling units (2a to 2d) transmit the defrost request signal to the remote controller (5
0), and the above operation is repeated.

When the number of units capable of performing the defrost simultaneous operation is two or more, a defrost permission signal is output in response to the defrost request signal until the number of units becomes possible.

-Effects of First Embodiment- Therefore, in the first embodiment, the data circuit network (41) is configured so that data can be bidirectionally transmitted between the remote controller (50) and each of the chilling units (2a to 2d). Thus, it is not necessary to provide a signal line for each control signal, and various data can be transmitted through one communication line (40), so that wiring work can be simplified.

Since the chilling units (2a to 2d) independently perform capacity control, the chilling unit (2a
Since the amount of data transmission between the remote controller (2) and the remote controller (50) can be minimized, the control system of the remote controller (50) can be simplified.

Since the number of operating chilling units (2a to 2d) can be controlled by the remote controller (50), refrigeration operations such as cooling and heating can be controlled with high accuracy.

In particular, since it is necessary to control the load of the liquid system (30), that is, the temperature of the conditioned liquid, according to the number of operating chilling units (2a to 2d), the remote controller (50) controls all the chilling units (2a to 2d). ) To control the number of operation
High efficiency operation is possible with a simple control configuration.

In addition, since the performance of one chilling unit (2a) is controlled, the load can be controlled with high accuracy while simplifying the control configuration.

Further, since the remote controller (50) can capture the temperature data of the chilling unit (2a) and the like,
There is no need to separately provide detection means for various types of temperature data required by the remote controller (50), so that an increase in the number of sensors can be prevented.

Further, since the chilling units (2a to 2d) serving as the master unit and the like are determined for each air conditioning operation, the actual operation time of each chilling unit (2a to 2d) can be reliably leveled. In particular, since the master unit and the like are determined by the number of times of thermo-on, the actual operation time of the compressor can be reflected, so that leveling can be accurately performed.

In particular, when each of the chilling units (2a to 2d) independently performs the capability control, information on the number of times of thermo-on is obtained and the master unit or the like is determined by the number of times of thermo-on.
The actual operation time of the compressor can be leveled.

Further, since the number of times of thermo-on is counted, the memory capacity can be reduced as compared with the case where the thermo-on time is counted, so that the control element can be downsized. Can be stored, so that the control system can be improved.

During each air-conditioning operation, the chilling units (2a to 2d) that are to be thermo-off in the order of thermo-on are determined, while the chilling units (2a to 2d) to be thermo-on in the order of thermo-off are determined. Each chilling unit (2a ~ 2
The operation of d) can be rotated, and the actual operation time of each chilling unit (2a to 2d) can be reliably leveled.

Further, since the master unit and the like are determined based on the difference between the number of times of thermo-on, the memory capacity can be reduced as compared with storing the number of times of thermo-on itself.

Further, since the remote controller (50) is provided with the third display section (6c) for displaying the inlet water temperature, the outlet water temperature, etc., the inlet water temperature, the outlet water temperature, etc. are displayed so that the operating condition can be accurately grasped. can do.

The chilling unit (2a
Since the defrost operation of (1) to (2d) is executed, it is possible to reliably prevent a large number of chilling units (2a, ...) from performing the defrost operation at the same time. As a result, an unnecessarily low temperature of the conditioning liquid can be reliably suppressed.

[0125]

Second Embodiment FIGS. 19 to 21 show a second embodiment.
This figure shows a timing chart in which a remote control (50) is provided with a thermo-on frequency correction means (53). The correction means (53) outputs a correction signal to the leveling means (52) so as to increase the number of times of thermo-on when the chilling units (2a to 2d) of the master unit continue operating in the full load state. .

More specifically, as shown in FIG. 19, at A21, the chilling unit (2a) of the master unit enters a full load state, and thereafter this full load state is maintained for a predetermined time Tfu.
The predetermined time Tfull is updated at A22, and after the predetermined time Tfull elapses at A23, the thermo-on count is set to two. That is, from A21 to A
23, it can be regarded as a normal one thermo-on state.
From 24, the number of thermo-ons is set to 3.

The same applies to the case where the chilling unit (2a) of the master unit is once turned off and then turned on again.
After the number of times of thermo-on is set to 4, at A25, the chilling unit (2a) of the parent machine enters the full load state, and then the full load state continues for a predetermined time Tfull,
In A26, the predetermined time Tfull is updated, and A27
In the above, when the predetermined time Tfull elapses, the number of thermo-ons is set to 5.

Thereafter, when the chilling unit (2a) of the master unit is once turned off and then turned on again, A2
In step 8, the number of thermo-ons is set to 6.

Therefore, the setting of the master unit when the above-mentioned correction of the number of times of thermo-on is performed is as shown in Table 2.

[Table 2]

At the time of the first air conditioning operation in Table 2 (a), the operation is the same as that of Table 1 (a) of the previous embodiment, but at the time of the second air conditioning operation, as shown in Table 2 (b), The number of times of thermo-on of the master unit at the time of the first operation is 6. As a result, the chilling unit (2c) of the unit number 3 which is the third unit is the master unit, the chilling unit (2d) of the unit number 4 which is the fourth unit is the first slave unit, and the chilling unit (2d) of the unit number 2 is the second unit. Unit (2b) is assigned to the second slave unit,
Chilling unit with unit number 1 (2a)
Are set in the third slave units, respectively.

In the third air-conditioning operation, Table 2
As shown in (c), the chilling unit (2d) of unit number 4 which is the fourth unit is the master unit, and the chilling unit (2c) of unit number 3 which is the third unit is the first slave unit.
Chilling unit with unit number 2 (2b)
Is set to the second slave unit, and the chilling unit (2a) having the unit number 1 as the first slave unit is set to the third slave unit.

Therefore, according to the second embodiment, since the number of times of thermo-on is corrected based on the thermo-on time of the chilling units (2a to 2d) of the master, the compression of the master with the longest operating time is reduced. Since the operating time of the machine can be accurately reflected in the number of thermo-ons,
More accurate leveling can be performed.

[0133]

FIGS. 22 and 23 show another embodiment of the present invention, in which two remote controllers (50, 50) are provided. That is, in FIG. 22, two remote controllers (50, 50) are connected to one chilling unit (2a), and a communication line (40) is connected between the chilling unit (2a) and each remote controller (50). A data circuit network (41) is formed via).

In FIG. 23, two remote controllers (50, 50) are connected to a plurality of chilling units (2a to 2d), and the plurality of chilling units (2a to 2d) and each remote controller (2a to 2d) are connected. A data network (41) is formed between the data network (50, 50) and the communication line (40).

The refrigeration system (10) of the present invention may be a cooling-only machine or a heating-only machine in addition to cooling and heating.
Further, a hot water supply operation may be performed, or a heat storage tank may be provided to perform cold heat storage or hot heat storage.

Further, the remote controller (50) is not limited to the one shown in FIG.
Is not limited to remote controllers.

The liquid system is not limited to the water system (30), but may be a system for circulating brine.

The data transmission method is not limited to each embodiment. In particular, the present invention only needs to control the rotation of each chilling unit (2a to 2d). , Remote control (50)
It is not necessary to perform this operation, but it is only necessary to perform the operation by transmitting and receiving signals between the chilling units (2a to 2d).

In each of the above embodiments, the slave unit is preferentially thermo-on and thermo-off during each refrigeration operation. However, in the invention according to claim 3, the thermo-on and thermo-off including the master unit are also performed. You may do so.
In other words, when the load during the refrigeration operation is reduced, the leveling means (52) starts the chilling unit (2b-2
While control is performed in the thermo-off state sequentially from d), when the load increases again, the chilling units (2b to 2d) that have been thermo-off may be thermo-on. According to this, during each refrigeration operation, the operation time of the compressor of each chilling unit (2a to 2d) is leveled, and more accurate leveling control can be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of the present invention.

FIG. 2 is a piping diagram of a chilling unit.

FIG. 3 is a transmission system diagram illustrating data transmission of the refrigeration apparatus.

FIG. 4 is a control block diagram illustrating a control system of the refrigeration apparatus.

FIG. 5 is a front view showing a remote controller.

FIG. 6 is a timing chart showing a rotation process.

FIG. 7 is a timing chart showing a rotation process.

FIG. 8 is a timing chart showing a rotation process.

FIG. 9 is a sequence diagram showing a control process of the air conditioning operation.

FIG. 10 is a sequence diagram showing a control process of an air-conditioning operation.

FIG. 11 is a sequence diagram illustrating a control process of the air-conditioning operation.

FIG. 12 is a sequence diagram illustrating a control process of the air conditioning operation.

FIG. 13 is a schematic diagram of a refrigerating apparatus for explaining a criterion for controlling the number of units.

FIG. 14 is a temperature characteristic diagram showing determination criteria.

FIG. 15 is a schematic diagram of a refrigerating apparatus for explaining another determination criterion for controlling the number of units.

FIG. 16 is an explanatory diagram showing a detachment process of a parent device.

FIG. 17 is an explanatory diagram illustrating a detachment process of the third slave unit.

FIG. 18 is a sequence diagram illustrating a control process of a defrost operation.

FIG. 19 is a timing chart showing another rotation process.

FIG. 20 is a timing chart showing a rotation process.

FIG. 21 is a timing chart showing a rotation process.

FIG. 22 is a transmission system diagram showing a connection state between another chilling unit and a remote controller.

FIG. 23 is a transmission system diagram showing a connection state between another chilling unit and a remote controller.

FIG. 24 is a transmission system diagram showing data transmission of a conventional air conditioner. .

[Explanation of symbols]

 10 Refrigeration equipment 11 Inlet temperature sensor (inlet temperature detecting means) 12 Outlet temperature sensor (outlet temperature detecting means) 2a ~ 2d chilling unit 21 Capacity control means 30 Water system (liquid system) 40 Communication line 41 Data network 50 Remote control (Control Unit) 51 Operation control means 52 Leveling means 53 Correction means 60 Display panel 6c Third display unit 70 Operation panel

Claims (6)

[Claims] A plurality of chilling units (2a to 2d) for performing a refrigeration operation for adjusting a conditioned liquid flowing in a liquid system (30) to a predetermined temperature are connected to the liquid system (30). In the chilling unit (2a-2d) during operation, the chilling unit (2a
In each of the refrigeration operations of ~ 2d), the chilling unit (2a) having the smallest judgment value based on the number of times of thermo-on of each chilling unit (2a ~ 2d) in the previous refrigeration operation is set as the master unit and the other chilling units are set. Leveling means (52) for setting the units (2b to 2d) as slave units and controlling the master unit to be in a thermo-on state preferentially each time the operation is started, while starting the slave units in ascending order based on the number of times of thermo-on in ascending order; A control device for a refrigeration system, comprising: 2. The control device for a refrigerating apparatus according to claim 1, wherein the leveling means (52) sequentially switches from a state in which the slave unit is thermo-on to a thermo-off state when the load decreases from a state in which the slave unit is thermo-on. A control device for a refrigerating apparatus, wherein when a load increases again in a state where the main unit is thermo-on while the control is being performed, the sub-unit thermostated first is thermo-oned. 3. The control device for a refrigeration system according to claim 1, wherein the leveling means (52) is configured to:
A refrigeration system control device characterized in that the chilling units (2b to 2d) that have been previously thermo-on are sequentially controlled to be in the thermo-off state, and when the load increases again, the chilling units (2b to 2d) that have been thermo-offed are thermo-on from the first chilling units (2b to 2d). . 4. The control device for a refrigeration system according to claim 1, further comprising a correction unit (53) that outputs a correction signal for increasing the number of times of thermo-on according to the duration of the thermo-on state to the leveling unit (52). A control device for a refrigeration system, comprising: 5. The control device for a refrigeration system according to claim 1, wherein the leveling means derives a determination value based on a difference in the number of times of thermo-on during a previous refrigeration operation. Control device for refrigeration equipment. 6. The control device for a refrigeration system according to claim 1, wherein each of the chilling units (2a to 2d) has a capacity control means (2a to 2d) for independently performing a capacity control so that an outlet temperature of the conditioned liquid becomes a predetermined temperature. 27) A control device for a refrigeration system, comprising: