KR102539014B1 - Apparatus to prevent freezing in the booster pump system and method for driving thereof - Google Patents

Abstract

The present invention is for a booster pump system capable of preventing the water filled inside the branch pipe from freezing by vibrating the branch pipe itself mounted on the discharge header by the vibration motor and vibrating the vibrator inside the branch pipe by the vibration motor. It relates to an antifreeze device and a driving method thereof.
A freeze protection device for a booster pump system according to the present invention is a booster pump system in which a plurality of booster pumps (P) are connected in parallel to a discharge header (10), wherein the discharge header (10) has a lower end of a branch pipe (110) connected, the sensor connection pipe 120 is vertically connected to the branch pipe 110 at the upper end of the branch pipe 110, the pressure sensor 130 is mounted on one end of the sensor connection pipe 120, and the branch pipe ( 110) is mounted on top of the vibration motor 140, the vibrator 150 is connected to the vibration motor 140, and the vibrator 150 is disposed long in the longitudinal direction of the branch tube 110 inside the branch tube 110. characterized by being

Description

Freeze protection device for booster pump system and its driving method

The present invention is for a booster pump system capable of preventing the water filled inside the branch pipe from freezing by vibrating the branch pipe itself mounted on the discharge header by the vibration motor and vibrating the vibrator inside the branch pipe by the vibration motor. It relates to an antifreeze device and a driving method thereof.

Korean Patent No. 10-0897477 (registered on May 6, 2009) introduces "Inverter Booster Pump for Freeze Prevention and Freeze Prevention Method in Inverter Booster Pump".

The inverter of the inverter booster pump for preventing freezing includes a rectifier receiving AC power from input power and converting it into DC power; a smoothing capacitor for smoothing the DC power rectified by the rectifying unit; an inverter unit receiving a signal from the PWM generator and converting the DC power smoothed by the smoothing capacitor into AC power of variable frequency-variable voltage; a current sensor for detecting the output power of the inverter unit; a PID controller; a Real Time Clock (RTC) outputting the current time; a temperature sensor for measuring external temperature; A freeze prevention determination unit is provided to set the freeze prevention mode using the external temperature of the temperature sensor and determine the operation time of the booster pump using RTC to prevent the pump from being damaged due to freezing in winter or when the ambient temperature is low.

However, in the inverter booster pump for preventing freezing, the fact that the pressure sensor, which is substantially most vulnerable to freezing and bursting, has not been considered.

Accordingly, an object of the present invention is to mount a pressure sensor and a vibration motor on a branch pipe branched from a discharge header, connect a vibrator to the vibration motor, and arrange the vibrator inside the branch pipe in a lengthwise direction of the branch pipe, Not only does the branch pipe itself vibrate, but the vibrator vibrates inside the branch pipe by the vibrating motor, so that it is possible to prevent water from freezing from the inner surface of the branch pipe due to surface peeling and to reduce the flow of water stored inside the branch pipe. It is to provide a freeze protection device for a booster pump system and a driving method thereof capable of inducing freezing of water filled inside a branch pipe.

Another object of the present invention is a booster pump system in which a hydrophobic coating agent is coated on the inner circumferential surface of the branch pipe, so that water particles are better surface peeled from the inner circumferential surface of the branch pipe by the hydrophobic coating agent, thereby preventing the water filled inside the branch pipe from freezing. It is to provide a freeze protection device and a driving method thereof.

An example of a freeze protection device for a booster pump system according to the present invention for achieving the above object is,

A booster pump system in which a plurality of booster pumps are connected in parallel to a discharge header,

The lower end of the branch pipe is connected to the discharge header, a sensor connection pipe is connected perpendicularly to the branch pipe at the upper end of the branch pipe, a pressure sensor is mounted on one end of the sensor connection pipe, and a vibration motor is mounted on the top of the branch pipe. , It is characterized in that the vibrator is connected to the vibration motor, and the vibrator is disposed long in the longitudinal direction of the branch pipe inside the branch pipe.

Another example of a freeze protection device for a booster pump system according to the present invention is,

A booster pump system in which a plurality of booster pumps are connected in parallel to a discharge header,

The lower end of the branch pipe is connected to the discharge pipe, a sensor connection pipe is connected perpendicularly to the branch pipe at the upper end of the branch pipe, a pressure sensor is mounted on one end of the sensor connection pipe, and a vibration motor is attached to the other end of the sensor connection pipe. is installed, the vibration motor is disposed on the opposite side of the pressure sensor based on the branch pipe, one end of the connecting rod is connected to the vibration motor, and the upper end of the vibrator is connected to the other end of the connecting rod, so that the vibrator moves from the inside of the branch pipe to the longitudinal direction of the branch pipe It is characterized in that it is arranged long as.

The paper pipe is characterized in that a hydrophobic coating agent is coated on the inner circumferential surface.

The vibrator is made of a metal material having corrosion resistance and is formed in a coil shape.

Alternatively, the vibrator may be made of a metal material having corrosion resistance and formed in a straight line shape.

A method of driving a freeze protection device for a booster pump system according to the present invention

Measuring the temperature of the branch pipe through a temperature sensor mounted on the branch pipe at regular intervals (monitoring time) for monitoring antifreeze (S1);

A step (S2) of comparing whether the measured temperature is higher than the critical temperature;

If the measured temperature is higher than the critical temperature, feeding back to step S1 (S3);

If the measured temperature is not higher than the critical temperature, driving the vibration motor for at least 3 seconds and measuring the current of the vibration motor (S4);

A step (S5) of comparing whether the measured current value is higher than the threshold current value;

If the measured current value is not greater than the threshold current value, performing a freeze prevention prevention mode (S6);

When the measured current value is greater than the threshold current value, performing a freeze protection warning mode (S7).

In the step (S1) of measuring the temperature of the branch pipe through the temperature sensor mounted on the branch pipe at regular intervals (monitoring time) for monitoring of freeze protection, the monitoring time is based on the critical temperature. It is characterized in that the monitoring time interval is changed in an increasing direction and, when the measured temperature is less than or equal to the critical temperature, the monitoring time interval is changed in a decreasing direction.

The step of performing the freeze prevention mode (S6) is characterized in that the vibration motor is started as much as the start-up time according to the operating conditions, and this is repeated a set number of times.

The startup time according to the operating conditions is characterized by the same as Equation 1 below.

(Equation 1)

t _runningm is the start-up time of the vibration motor, t _max is the maximum start-up time of the vibration motor, P _v is the percentage of flow rate revolutions of the currently driven booster pump, and P _s is the percentage of flow rate revolutions of all booster pumps.

The step of performing the freeze protection warning mode (S7) is

Issuing a warning sound, driving all booster pumps of the booster pump system, and repeatedly starting the vibration motor as many times as the number of times set as the maximum startup time (5 seconds) regardless of operating conditions (S7-1);

Measuring the current value and comparing whether the currently measured current value is smaller than the previous measured current value (S7-2);

If the currently measured current value is smaller than the previous measured current value, comparing whether the currently measured current value is greater than the threshold current value (S7-3);

If the measured current value is greater than the threshold current value, feeding back to step 7-1 so as to maintain the freeze protection warning mode (S7-4);

If the measured current value is less than the threshold current value, releasing the anti-freezing warning motor and feeding back to the anti-freezing mode (S6) (S7-5);

If the currently measured current value is not smaller than the previous measured current value, it is characterized in that it consists of a step (S7-6) of feeding back to step S7-1.

Accordingly, the driving method of the freeze protection device for a booster pump system according to the present invention has an effect of preventing components such as a pressure sensor from freezing due to freezing of water filled inside the branch pipe.

FIG. 1 shows a freeze protection device according to a first embodiment of the present invention mounted on a discharge header in a booster pump system.
FIG. 2 is an enlarged detailed view of (a) of FIG. 1 showing a freeze protection device according to a first embodiment of the present invention, and the vibrator is in the form of a coil.
FIG. 3 shows a modified example of FIG. 2 in which the vibrator has a straight line shape.
4 shows a freeze protection device according to a second embodiment of the present invention, in which a coil-shaped vibrator is connected to a vibration motor by a connecting rod.
FIG. 5 is a modified example of FIG. 4 , in which a straight-line vibrator is connected to a vibration motor through a connecting rod.
6 is a flowchart illustrating a driving method of a freeze protection device for a booster pump system according to the present invention.
7 is a flowchart illustrating a freeze protection warning mode.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. This description is not intended to limit the present invention to specific embodiments, but should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. While describing each drawing, similar reference numerals have been used for similar components, and unless otherwise defined, all terms used in this specification, including technical or scientific terms, are common knowledge in the art to which the present invention belongs. has the same meaning as commonly understood by the person who has it.

In this document, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated. And, regardless of the embodiment, the same reference numerals will be used for the same components.

In general, a booster pump system is used to provide a constant head (pressure) in a place where a flow rate is changed in real time by a number of users, such as a building or an apartment building. To this end, a plurality of booster pumps are connected in parallel between a suction header and a discharge header, each booster pump is controlled by its corresponding inverter, the inverter is controlled by a controller, and the pressure change is sensed at the discharge header. A pressure sensor is installed, and a pressure tank is connected to the discharge header.

Referring to FIG. 1 , FIG. 1 shows a booster pump system according to the present invention, in which a plurality of booster pumps P are connected to a discharge header 10 in parallel.

Unexplained reference numeral 30 denotes a pressure tank in the discharge header 10, and unexplained reference numeral 40 denotes a control box.

Referring to FIG. 2, in the booster pump system configured as described above, in the freeze protection device according to the first embodiment of the present invention, the lower end of the branch pipe 110 is connected to the discharge header 10, and the branch pipe 110 The sensor connection pipe 120 is vertically connected to the branch pipe 110 at the upper end, the pressure sensor 130 is mounted on one end of the sensor connection pipe 120, and the vibration motor is mounted on the top of the branch pipe 110. 140 is mounted, the vibrator 150 is connected to the vibration motor 140, and the vibrator 150 is disposed inside the branch pipe 110 in a longitudinal direction of the branch pipe 110.

The paper pipe 110 is coated with a hydrophobic coating on the inner circumferential surface. The hydrophobic coating agent is already known and can be purchased commercially, so a detailed description thereof will be omitted.

As shown in FIG. 2 , the vibrator 150 is made of a metal material having corrosion resistance and is formed in a coil shape.

Referring to FIG. 3 , alternatively, the vibrator 150 is made of a metal material having corrosion resistance and is formed in a straight line shape.

In general, the straight type vibrator is suitable for a branch pipe having a small diameter, and the coil type vibrator is suitable for a branch pipe having a large diameter.

The vibrator 150 is for inducing resonance inside the branch pipe 110, and is designed to be close to the resonant frequency range to increase the efficiency of vibration. That is, the length and thickness of the vibrator and the connection structure with the vibration motor are adjusted according to the diameter and length of the branch pipe.

In addition, the freeze protection device according to the first embodiment of the present invention further includes a temperature sensor 160 mounted on the branch pipe 110 to measure the temperature of the branch pipe 110 .

In the freeze protection device for a booster pump system according to the first embodiment of the present invention configured as described above, not only the branch pipe 110 itself is vibrated by the vibrating motor 140, but also the vibrator 150 is moved by the vibrating motor 140. By vibrating inside the branch pipe 110, it is possible to prevent water from freezing from the inner surface of the branch pipe 110 due to surface peeling, and to induce the flow of water stored inside the branch pipe 110. , It prevents the water filled inside the branch pipe 110 from freezing. Here, the surface peeling phenomenon by vibration generates uniform nuclei from non-uniform nuclei of particles, so that the water filled inside the branch pipe 110 does not freeze well.

In addition, since the inner circumferential surface of the paper pipe 110 is coated with a hydrophobic coating agent, when the water particles are vibrated, the water particles are better surface peeled off from the inner circumferential surface of the paper pipe 110 by the hydrophobic coating agent, so that the inside of the paper pipe 110 The filled water will be better protected from freezing.

4, in the freeze protection device according to the second embodiment of the present invention, the lower end of the branch pipe 110 is connected to the discharge pipe 10, and the sensor connection pipe 120 is installed at the upper end of the branch pipe 110. It is vertically connected to the branch pipe 110, the pressure sensor 130 is mounted on one end of the sensor connector 120, and the vibration motor 140 is mounted on the other end of the sensor connector 120, The vibration motor 140 is disposed on the opposite side of the pressure sensor 130 based on the branch pipe 110, one end of the connecting rod 145 is connected to the vibration motor 140, and the vibrator 150 is connected to the other end of the connecting rod 145. ) is connected, the vibrator 150 is disposed long in the longitudinal direction of the branch pipe 110 inside the branch pipe 110.

The paper pipe 110 is coated with a hydrophobic coating on the inner circumferential surface. The hydrophobic coating agent is already known and can be purchased commercially, so a detailed description thereof will be omitted.

As shown in FIG. 4 , the vibrator 150 is made of a metal material having corrosion resistance and is formed in a coil shape.

Referring to FIG. 5 , alternatively, the vibrator 150 is made of a metal material having corrosion resistance and is formed in a straight line shape.

In general, the straight type vibrator is suitable for a branch pipe having a small diameter, and the coil type vibrator is suitable for a branch pipe having a large diameter.

The vibrator 150 is for inducing resonance inside the branch pipe 110, and is designed to be close to the resonant frequency range to increase the efficiency of vibration. That is, the length and thickness of the vibrator and the connection structure with the vibration motor are adjusted according to the diameter and length of the branch pipe.

In addition, the freeze protection device according to the second embodiment of the present invention further includes a temperature sensor 160 mounted on the branch pipe 110 to measure the temperature of the branch pipe 110 .

In the freeze protection device for a booster pump system according to the second embodiment of the present invention configured as described above, not only the branch pipe 110 itself is vibrated by the vibrating motor 140, but also the vibrator 150 is moved by the vibrating motor 140. By vibrating inside the branch pipe 110, it is possible to prevent water from freezing from the inner surface of the branch pipe 110 due to surface peeling, and to induce the flow of water stored inside the branch pipe 110. , It prevents the water filled inside the branch pipe 110 from freezing. Here, the surface peeling phenomenon by vibration generates uniform nuclei from non-uniform nuclei of particles, so that the water filled inside the branch pipe 110 does not freeze well.

In addition, since the inner circumferential surface of the paper pipe 110 is coated with a hydrophobic coating agent, when the water particles are vibrated, the water particles are better surface peeled off from the inner circumferential surface of the paper pipe 110 by the hydrophobic coating agent, so that the inside of the paper pipe 110 The filled water will be better protected from freezing.

A driving method of the freeze protection device for a booster pump system according to the present invention configured as described above will be described in detail with reference to FIG. 6 .

1. The temperature of the branch pipe is measured through the temperature sensor 160 mounted on the branch pipe 110 at regular intervals (monitoring time) for monitoring of freeze protection (S1).

At this time, the monitoring time is changed in the direction of increasing the monitoring time interval according to the measured temperature if the measured temperature is greater than or equal to the critical temperature based on the critical temperature, and in the direction of decreasing the monitoring time interval if the measured temperature is less than or equal to the critical temperature. Changed.

The critical temperature varies depending on the fluid to be pumped. For example, in the case of tap water (water supplied from a tap water supply), 0° C. is set as the critical temperature.

For example, if the temperature of the branch pipe 110 measured by the temperature sensor 160 is 0° C. in a state where the monitoring time is set to 1 hour, the next monitoring time becomes an interval of 1 hour, and the measured temperature is 1° C. , the monitoring time interval increases to 1 hour and 30 minutes, when the measured temperature is 2°C, the monitoring time interval increases to 2 hours, and when the measured temperature is -1°C, the monitoring time interval decreases to 50 minutes, , when the measured temperature is -2 °C, the monitoring time interval is reduced to 40 minutes.

2. Is the measured temperature higher than the critical temperature? (S2).

Here, when the fluid pumped by the booster pump system is tap water (water supplied from tap water), 0° C. is set as the critical temperature.

3. If the measured temperature is higher than the critical temperature, it is fed back to step S1 (S3).

4. If the measured temperature is not higher than the critical temperature, drive the vibration motor for at least 3 seconds and measure the current of the vibration motor (S4).

5. Compare whether the measured current value is higher than the threshold current value (S5).

6. If the measured current value is not greater than the critical current value, the freeze protection prevention mode is performed (S6).

7. If the measured current value is greater than the threshold current value, a freeze protection warning mode is performed (S7).

6. The step of performing the antifreeze prevention mode (S6) starts the vibration motor as much as the start time according to the operating conditions, and sets it a set number of times (for example, twice at 1 second delay intervals depending on the environment in which the booster pump system is installed) ~ 10 times).

The startup time according to the operating conditions is shown in Equation 1 below.

t _runningm is the starting time of the vibration motor.

t _max is the maximum startup time of the vibration motor. In the present invention, the maximum activation time is set to 5 seconds. However, the maximum operating time can be adjusted depending on the liquid and conditions.

P _v is the flow speed percentage of the currently driven booster pump.

P _s is the percentage of total booster pump flow rate.

For example, if a total of 3 booster pumps are configured, each with a maximum speed percentage of 100%, and one booster pump is currently running at maximum (100%), t _runningm = 5×(1-100/300) = 3.33 seconds.

Therefore, the vibration motor is repeatedly started as many times as set for 3.33 seconds.

And, as shown in FIG. 1, the booster pump system is composed of two small flow pumps and two large flow pumps, the maximum rotational speed percentage of the low flow pump is 50%, and the maximum rotational speed percentage of the large flow pump is 100%. Currently If one small-flow pump and one large-flow pump are driven to their maximum, t _running = 5 × (1-150/300) = 2.5 seconds.

Therefore, the vibration motor is repeatedly started as many times as set for 2.5 seconds.

Referring to FIG. 7, 7. In the step of performing the freeze protection warning mode (S7), a warning sound is issued, all booster pumps of the booster pump system are driven, and the vibration motor operates for a maximum operating time (5 seconds) regardless of operating conditions. ) is repeatedly started as many times as set (S7-1).

Thereafter, the current value is measured, and whether the currently measured current value is smaller than the previous measured current value is compared (S7-2).

If the currently measured current value is smaller than the previous measured current value, whether the currently measured current value is greater than the threshold current value is compared (S7-3).

If the measured current value is greater than the critical current value, feedback is given to step 7-1 to maintain the freeze protection warning mode (S7-4).

If the measured current value is smaller than the threshold current value, the freeze protection warning motor is released and fed back to the freeze prevention prevention mode (S6) (S7-5).

In the step of comparing whether the currently measured current value is smaller than the previous measured current value (S7-2), if the current measured current value is not smaller than the previous measured current value, it is fed back to step S7-1 (S7-6) .

As described above, the present invention has been described by specific details such as specific components and limited embodiments and drawings, but these are provided to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , Those skilled in the art in the field to which the present invention belongs can make various modifications and variations from these descriptions.

For example, the present invention has been described as the branch pipe 110 to which the pressure sensor 130 is mounted is mounted on the discharge header 10, but the branch pipe 110 to which the pressure sensor 130 is mounted is also mounted on the suction header. can

Therefore, the spirit of the present invention should not be limited to the described embodiments, and it will be said that not only the claims to be described later, but also all modifications equivalent or equivalent to these claims belong to the scope of the present invention. .

P: booster pump 10: discharge header
110: branch pipe 120: sensor connector
130: pressure sensor 140: vibration motor
150: vibrator

Claims (11)

delete delete delete delete delete delete Measuring the temperature of the branch pipe through the temperature sensor 160 mounted on the branch pipe 110 at regular intervals (monitoring time) for monitoring antifreeze (S1);
A step (S2) of comparing whether the measured temperature is higher than the critical temperature;
If the measured temperature is higher than the critical temperature, feeding back to step S1 (S3);
If the measured temperature is not higher than the critical temperature, driving the vibration motor for at least 3 seconds and measuring the current of the vibration motor (S4);
A step (S5) of comparing whether the measured current value is higher than the threshold current value;
If the measured current value is not greater than the threshold current value, performing a freeze prevention prevention mode (S6);
If the measured current value is greater than the threshold current value, performing a freeze protection warning mode (S7);
The step of performing the freeze protection warning mode (S7) is
Issuing a warning sound, driving all booster pumps of the booster pump system, and repeatedly starting the vibration motor as many times as the number of times set as the maximum startup time (5 seconds) regardless of operating conditions (S7-1);
Measuring the current value and comparing whether the currently measured current value is smaller than the previous measured current value (S7-2);
If the currently measured current value is smaller than the previous measured current value, comparing whether the currently measured current value is greater than the threshold current value (S7-3);
If the measured current value is greater than the threshold current value, feeding back to step 7-1 so as to maintain the freeze protection warning mode (S7-4);
If the measured current value is less than the threshold current value, releasing the anti-freezing warning motor and feeding back to the anti-freezing mode (S6) (S7-5);
If the currently measured current value is not smaller than the previous measured current value, the method of driving a freeze protection device for a booster pump system, characterized in that consisting of a step (S7-6) of feeding back to step S7-1.
According to claim 7,
In the step (S1) of measuring the temperature of the branch pipe through the temperature sensor 160 mounted on the branch pipe 110 at regular intervals (monitoring time) for freezing prevention monitoring, the monitoring time is determined by the critical temperature as the measured temperature. If the temperature is higher than the temperature, the monitoring time interval is changed in the direction of increasing according to the measured temperature, and if the measured temperature is less than the critical temperature, the monitoring time interval is changed in the direction of decreasing. driving method.
According to claim 7,
The step (S6) of performing the freeze prevention mode is a method of driving a freeze protection device for a booster pump system, characterized in that the vibration motor is started as much as the start time according to the operating conditions and repeated a set number of times.
According to claim 9,
A method of driving a freeze protection device for a booster pump system, characterized in that the startup time according to the operating conditions is as shown in Equation 1 below.
(Equation 1)

t _runningm is the start-up time of the vibration motor, t _max is the maximum start-up time of the vibration motor, P _v is the percentage of flow rate revolutions of the currently driven booster pump, and P _s is the percentage of flow rate revolutions of all booster pumps.
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