KR20160038606A - Cascade system for controlling numbers of standby boiler or gas water heater and method of the system - Google Patents

Abstract

The present invention relates to a cascade system for controlling standby unit numbers and a control method for the same. A cascade control unit determines that water amount is detected in a cascade system using a water amount sensor when a boiler or water heaters are set in an automatic standby mode. After a water amount safety time passes, the cascade system calculates whole water amount detected by the water amount sensor and calculates Y based on the whole water amount and an operation water amount calculated in the boiler or the water heaters. The cascade system determines whether formula (1) Z >= Y >= X is satisfied, wherein Z is a maximum standby number of the boiler or the water heater, Y is a requested standby number of the boiler or the water heater, and X is a setting standby number of the boiler or the water heater. When the condition of the formula (1) is not satisfied, the X is renewed. The cascade system can provide optimal hot water or heating for a user and also provides convenience for managing a system for a manager managing the cascade system.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cascade system capable of adjusting a standby number,

The present invention relates to a cascade system capable of adjusting the number of atmospheres and a control method thereof. More particularly, the present invention relates to a cascade system having a plurality of compact boilers or water heaters, The present invention relates to a cascade system capable of providing optimum hot water or heating to a user and also capable of providing convenience to the administrator who manages the cascade system.

Generally, a cascade system is a system in which a plurality of small boilers are connected in parallel to accommodate the capacity of a large boiler so that the boiler can be selectively operated as much as the heat required for the heating load. , It is possible to install in a small space by using a small boiler and it is easy to maintain, repair and manage. In addition, the cascade system operates only a part of the heat source when the heating load is low, and when the heating load is required, the heat source is operated in addition to the required amount to increase the heat amount. Thereby contributing to energy savings.

In the conventional cascade system, the administrator of the system directly sets the number of waiting seats so that the number of the boilers or the water heater is manually controlled according to the user's requested hot water or the amount of heating heat.

Therefore, when the number of heat source devices capable of directly burning is relatively smaller than the number of heaters required for supplying the user, the hot water springs are delayed and the time is delayed until the user reaches the set temperature required by the user. In addition, the administrator of the cascade system is inconvenient to manually adjust the number of waiting devices of the heat source device to improve the tapping speed according to the amount of hot water used by the user.

In general, the number of boilers or water heaters in a cascade system refers to the number of heat source devices in which the servo va lle is open when these devices are not used.

For example, if the amount of water consumed when a single shower is turned on is 11 liters per minute and the minimum amount of combustion of the boiler or water heater is 3 liters per minute and there are four water heaters in the standby state, (3 liters), the three water heaters operate and the remaining one has a combustion quantity of less than the minimum number of liters (11 liters) - the minimum number of liters (9 liters) of litter = 2 liters, .

Therefore, the controller of the cascade system must close the servo valve of the remaining water heater and shut off the supply of water, so that the water will not be supplied to the other water heater.

Therefore, in the above case, since the waiting period is larger than the appropriate waiting period, the user experiences inconvenience due to the temperature change of the hot water. In the above example, the appropriate waiting logarithm is 3.

Korean Patent Laid-Open Publication No. 10-2011-0032750 discloses a method of measuring the temperature of direct water flowing into a multi-water heater, detecting a set temperature set by a user, comparing a user set value and a direct water temperature, The operation reference value for further activating the water heater and the regular reference value for further stopping each water heater are changed. However, in this method, the operation reference value and the stop reference value are changed according to the user use condition, and the operation temperature and the user set temperature difference are calculated every time the user uses the hot water. It is inconvenient to change the set value.

Korean Patent Publication No. 10-2011-0032750 Korean Patent Laid-Open No. 10-2009-0120752 Korean Patent Publication No. 10-2012-0076092 Korean Patent No. 10-1433084

SUMMARY OF THE INVENTION The present invention has been made under the above background and it is an object of the present invention to provide a cascade system in which a plurality of compact boilers or water heaters are configured in a complex manner, The present invention provides a cascade system capable of providing optimum hot water or heating for the user, and also capable of providing a convenience of system management to a manager who manages the cascade system, and a control method thereof.

According to an aspect of the present invention, there is provided a cascade system capable of adjusting the number of atmospheres,

A quantity control unit for controlling the amount of heating or hot water supplied to the user in the cascade system;

A quantity calculation unit for calculating the amount of heating or hot water supplied to the user;

A combustion controller for transmitting a command to start or stop the combustion device to the combustion device;

A quantity control unit for controlling an amount of water supplied to the user;

A display unit for displaying user input contents or a state of the device;

A quantity sensor for detecting the amount of water supplied from the direct water source;

A quantity controller for controlling the amount of water supplied from the direct water source;

And a cascade control unit for performing a heat quantity control and an operation control based on data transmitted from a data processing unit for processing data transmitted from each boiler or a water heater through a communication unit for communication between each boiler or water heaters,

The cascade control unit determines whether the quantity is detected by the quantity sensor in the cascade system under the condition that the boiler or the water heaters are set to the automatic standby mode and calculates the total quantity detected by the quantity sensor after the quantity safety time has elapsed And Y is calculated on the basis of the total water quantity and the operation water quantity collected from the boiler or the water heaters,

Z > = Y > = X (1)

(Where Z is the maximum waiting number of the boiler or water heater, Y is the waiting number of the boiler or the water heater, and X is the set waiting number of the boiler or water heater), and satisfies the condition of the above formula (1) And if it does not, updates the X. A cascade system is provided.

In yet another embodiment, the cascade control unit may be configured to control the cascade control unit based on previously set values of A, B, and C (where A is a previous minimum standby number, B is a previous maximum standby number, and C is a manager setting value)

A> Y> C ... (2) and

B> Y> C ... It is judged whether or not the condition of the expression (3) is judged.

In another embodiment, in the case where the Y value satisfies the conditions of the equations (2) and (3), the determination is repeated a plurality of times to calculate an average value of the set waiting queue number X, Inform update.

According to another embodiment of the present invention, there is provided a control method of a cascade system capable of adjusting the number of atmospheres,

Determining whether a quantity is detected in the cascade system while the cascade system is in an automatic standby mode;

Counting the total quantity discharged from the cascade system after the quantity stabilization time when the quantity is detected, and calculating the total quantity / operating quantity = Y (here, the number of waiting boilers or water heater requests);

Determining whether Z > = Y > = X (1); And

(Where Z is the maximum waiting number of the boiler or water heater, Y is the number of waiting requests of the boiler or water heater, and X is the set waiting number of the boiler or water heater)

Wherein X is updated when the condition of the formula (1) is not satisfied.

In yet another embodiment, the method further comprises the steps of: determining, based on the previously set values of A, B, C (where A is the previous minimum waiting number, B is the previous maximum waiting number B,

A> Y> C ... (2) and

B > Y > C ... (3).

In another embodiment, in the case where the Y value satisfies the conditions of the equations (2) and (3), the determination is repeated a plurality of times to calculate an average value of the set waiting queue number X And notifying the update of the set waiting number.

The present invention extracts the current request waiting log value based on the operation quantity as the minimum quantity for burning the total quantity and the total quantity collected by the heat source device. If this value is not proper, the previous minimum waiting log number, maximum waiting log number, It is possible to provide the user with optimal hot water or heating by determining whether the current request waiting log value is an appropriate range based on the calculated waiting log value and calculating the average value of the waiting waiting log number, It is possible to provide the administrator with convenience of system management.

Figure 1 shows a block diagram of an atmospheric logarithm adjustable cascade system in accordance with an embodiment of the present invention.
2 shows a flowchart of a control method of a cascade system according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, those skilled in the art will recognize that the embodiments of the present invention may be modified in various ways and that the scope of the present invention is not limited to the embodiments described below. The shape and size of the elements in the drawings may be exaggerated for clarity of description and the same or similar reference numerals are given to the same or similar elements throughout the drawings and are not directly related to the gist of the present invention The description thereof will be omitted so as not to obscure the gist of the present invention.

Referring to Figure 1, a block diagram of an atmospheric logarithm adjustable cascade system in accordance with one embodiment of the present invention is shown.

As shown in the drawing, the cascade system of the present invention is constituted by a main device A and a sub device B, and the main device A is connected to the cascade system 1000 in such a manner that the amount of heating or hot water A combustion control unit 20 for transmitting a command for starting or stopping the combustion device 70 to the combustion device 90, a quantity control unit 40 for controlling the amount of water supplied to the user, And a display unit 30 for displaying user input contents or the state of the apparatus. The sub apparatus B includes a quantity sensor 110 for detecting the amount of water supplied from the direct water source, And a water quantity controller 80 for controlling the water quantity. The cascade control unit 70 performs the heat quantity control and the operation control based on the data transmitted from the data processing unit 60 through the communication unit 50 from each water heater.

The operation of the cascade system according to the present invention will now be described in detail.

The cascade control unit 70 of the present invention determines whether the quantity of the water in the cascade system 1000 is detected by the quantity sensor 110 in a state where the water heaters are set in the automatic standby mode do. If it is determined that the quantity is detected, the cascade control unit 70 calculates the total quantity detected by the quantity sensor 70 after the quantity stabilization time for stabilizing the quantity for a certain period of time.

Then, the cascade control unit 70 calculates the current water heater request waiting number Y on the basis of the total water amount collected from the water heaters and the operation water quantity, which is a minimum quantity for burning.

Next, the cascade control unit 70 determines whether the value of the waiting queue number Y is appropriate based on the relationship between the maximum waiting queue number Z and the waiting queue number X of the usage water heater. In the case of the example described in the background art above, the number of requests waiting and the appropriate waiting queue number is three. After that, it is judged whether or not the current waiting waiting logarithm can accommodate the request waiting logarithm from the relation between the maximum waiting logarithm and the setting waiting logarithm.

That is, Z> = Y> = X (1)

, The set waiting queue number X is not updated.

If the condition of the above formula (1) is not satisfied, the setting waiting log number X is updated as follows.

The cascade control unit 70 sets the request waiting logarithm Y (Y) based on the previous minimum standby logarithm A, the previous maximum standby logarithm B, and the manager's set value C previously set in operating the cascade system It is judged whether or not the value is in a proper range.

That is, A> Y> C (2) and

    B> Y> C ... (3).

In the case where the Y value satisfies the conditions of the above equations (2) and (3), the request waiting logarithmic Y value may be used later for correction of the final set waiting logarithmic value X '. Then, the routine is repeated several times to calculate the average value of the set waiting queue number X. For example, in the case of the prior art example, in the case of five iterations,

 1 time  Episode 2  3rd time  4 times  5 times  3  4  3  3  4

, The average Y value is 17/5 = 3.4, and the setting waiting number 4 is updated to 3.

Then, for example, when there is a request from the user, the user is notified of the waiting algebra update through the display unit 30 of the cascade system or the unshown regulator.

Referring to FIG. 2, a flowchart of a method of controlling a cascade system according to an embodiment of the present invention is shown.

First, in step S20, the cascade control unit 70 determines whether the cascade system is in the automatic standby mode and whether the quantity is detected in the cascade system 1000 (S40). If not, the process returns to step S20 .

If it is determined in step S40 that the quantity of water has been detected, after the quantity stabilization time for discharging the quantity of water has elapsed, the cascade control unit 70 compiles the total quantity detected in the entire cascade system 1000 (S60, S80). Then, the cascade control unit 70 calculates the current water heater request waiting log value Y based on the total water amount collected from the water heaters and the operation water quantity, which is a minimum quantity for burning. That is, Y = total quantity / operational quantity

The cascade control unit 70 determines whether the value of the request waiting queue number Y is appropriate based on the relationship between the maximum waiting queue number Z of the used hot water heater and the set waiting queue number X. [

It is determined whether or not the above condition (1) satisfies the condition of Z> = Y> = X. If the above condition is satisfied, the setting waiting logarithm X is not updated and the process returns to step S20.

If the condition of the above equation (1) is not satisfied, the setting waiting log number X is updated (S140)

In step S200, the waiting-logarithm update procedure is performed. First, based on the previous minimum standby logarithm A, the previous maximum standby logarithm B, and the manager's set value C, Value, and specifically

In step S220, it is determined whether the condition of formula (2), the minimum minimum waiting number> Y> manager set value is satisfied. When the above condition is not satisfied,

That is, if the previous minimum waiting number < = request waiting number, the previous minimum waiting number is updated (step S240).

Then, in step S260, it is determined whether the condition of the above equation (3), the previous maximum waiting queue number> Y> manager set value is satisfied. When the above condition is not satisfied,

 That is, if the previous maximum waiting number < = request waiting number, the previous maximum waiting number is updated (step S280).

 When the Y value satisfies the above-mentioned conditions (2) and (3), the routine is repeated several times to calculate the average value of the set waiting queue number X.

That is, as in step S300, the value of X update = Y / average CNT is calculated, and when there is a request from the user, for example, the display unit 30 of the cascade system or the non- To the user.

Although the cascade system of the present invention and its control method have been described above in connection with a water heater cascade system, the same can be applied to a boiler cascade system as well.

Although the present invention has been described with reference to the drawings, it is to be understood that the present invention is not limited by the foregoing description, and the scope of the present invention is not limited to the following embodiments It is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

10: quantity calculation unit 20: combustion control unit
30: Display unit 40:
50: communication unit 60: communication data processing unit
70: Cascade control unit 80: Quantity controller
90: Fan / solenoid valve / ignition / combustion device
100: Display device 1000: Cascade system

Claims (6)

In the atmospheric logarithm adjustable cascade system,
A quantity control unit for controlling the amount of heating or hot water supplied to the user in the cascade system;
A quantity calculation unit for calculating the amount of heating or hot water supplied to the user;
A combustion controller for transmitting a command to start or stop the combustion device to the combustion device;
A quantity control unit for controlling an amount of water supplied to the user;
A display unit for displaying user input contents or a state of the device;
A quantity sensor for detecting the amount of water supplied from the direct water source;
A quantity controller for controlling the amount of water supplied from the direct water source;
And a cascade control unit for performing a heat quantity control and an operation control based on data transmitted from a data processing unit for processing data transmitted from each boiler or a water heater through a communication unit for communication between each boiler or water heaters,
The cascade control unit determines whether the quantity is detected by the quantity sensor in the cascade system under the condition that the boiler or the water heaters are set to the automatic standby mode and calculates the total quantity detected by the quantity sensor after the quantity safety time has elapsed And Y is calculated on the basis of the total water quantity and the operation water quantity collected from the boiler or the water heaters,
Z > = Y > = X (1)
(Where Z is the maximum waiting number of the boiler or water heater, Y is the waiting number of the boiler or the water heater, and X is the set waiting number of the boiler or water heater), and satisfies the condition of the above formula (1) And if not, updates X. &lt; Desc / Clms Page number 24 &gt;
The method according to claim 1,
The cascade control unit determines whether or not the cascade control unit is in a state in which the cascade control unit determines that the cascade control unit
A>Y> C ... (2) and
B>Y> C ... It is determined whether the condition of the expression (3) is satisfied or not.
3. The method according to claim 1 or 2,
And when the Y value satisfies the conditions of the equations (2) and (3), the determination is repeated a plurality of times to calculate an average value of the set waiting queue number X to notify the update of the set waiting queue number Cascade system with adjustable standby number.
A method for controlling a cascade system capable of adjusting the number of queues,
Determining whether a quantity is detected in the cascade system while the cascade system is in an automatic standby mode;
Counting the total quantity discharged from the cascade system after the quantity stabilization time when the quantity is detected, and calculating the total quantity / operating quantity = Y (here, the number of waiting boilers or water heater requests);
Determining whether Z > = Y > = X (1); And
(Where Z is the maximum waiting number of the boiler or water heater, Y is the number of waiting requests of the boiler or water heater, and X is the set waiting number of the boiler or water heater)
X is updated when the condition of the formula (1) is not satisfied.
5. The method of claim 4,
Based on the previously set A, B, and C values (where A: previous minimum number of days, B: previous maximum number of days (B), C:
A>Y> C ... (2) and
B>Y> C ... (3) is satisfied. The method according to claim 1, further comprising the step of:
The method according to claim 4 or 5,
Further comprising the step of repeatedly performing the above determination a plurality of times to calculate an average value of the setting waiting logarithm X to notify the update of the setting waiting logarithmic value when the Y value satisfies the condition of the formula (2) and the formula (3) Wherein the at least one at least one of the plurality of at least one of the at least two at least two of the at least one at least one of the plurality of at least one at least one of

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