JP5950584B2 - Open type deaerator and flow rate control method - Google Patents

Description

  The present invention relates to an open type deaeration device and a flow rate control method.

  As a hot water supply system used for buildings, there is a central hot water supply type circulating hot water supply system. An example of a circulating hot water system is a sealed hot water tank, an outgoing pipe through which hot water flowing out of the hot water tank flows, a return pipe that returns hot water to the hot water tank, an elevated water tank that sends water to the hot water tank, and these pipes And a circulation pump for forcibly circulating hot water. In a circulating hot water supply system shown as an example, water stored in an elevated water tank is sent to a sealed hot water tank installed on the ground or underground, and heated by a heat source installed in the hot water tank to produce hot water. After the hot water flows into the return pipe from the outward pipe due to the supply pressure, the hot water returns to the hot water tank again from the return pipe and is heated. Hot water is used by opening a hot water tap installed in the pipe, and the used decrease in hot water is replenished from the elevated water tank to the hot water tank.

  Copper pipes, copper alloy pipes, and stainless steel pipes are used as outgoing pipes and return pipes used in the circulating hot water supply system. Copper pipes, copper alloy pipes, and stainless steel pipes may cause corrosion such as pitting corrosion and erosion due to dissolved oxygen, free carbonic acid, and residual chlorine contained in hot water. There may be water leakage. If these pipes are corroded or if water leaks to them, maintenance such as pipe repair and replacement must be performed frequently, not only requiring labor, but also to maintain a circulating hot water system. The cost will increase significantly. In order to prevent corrosion and water leakage of those pipes, an open type deaeration device is disclosed that is installed in a circulating hot water supply system and removes dissolved oxygen, free carbonic acid, and residual chlorine contained in hot water supply (see Patent Document 1).

  The open-type deaeration device disclosed in Patent Document 1 stores a predetermined amount of hot water flowing in the circulating hot water system at a predetermined water level and is located above the hot water storage unit and stores a predetermined amount of air. A tank having an air reservoir, a nozzle that is located in the air reservoir and sprays hot water, an outflow pipe that discharges hot water from the hot water storage, and a hot water that is installed in the outflow pipe to force hot water from the hot water storage Formed from an outflow pump that discharges, an air supply pipe that supplies outside air to the air pool, and an exhaust pipe that releases dissolved oxygen, free carbonic acid, and residual chlorine contained in hot water from the air pool to the atmosphere together with air Has been. This open-type deaeration device is installed in the outgoing pipe of the circulating hot water supply system.

  In the open-type deaerator, a part of hot water flowing in the outgoing pipe flows into the inlet pipe branched from the outgoing pipe, reaches the nozzle located in the air reservoir of the tank from the inlet pipe, and the hot water is supplied from the nozzle to the air. Sprayed on the pool. The hot water sprayed from the nozzle is heated to a temperature of about 60 ° C., becomes fine particles and is released into the air reservoir of the tank, and the dissolved air, free carbonic acid, and residual Chlorine is separated. The particulate hot water separated from dissolved air, free carbonic acid, and residual chlorine is dropped into the hot water storage section as water droplets in the tank. Hot water in the hot water storage section flows out of the tank through the outflow pipe, and then returns to the forward pipe from the outflow pipe. Dissolved oxygen, free carbonic acid, and residual chlorine separated from the hot water and remaining in the air reservoir of the tank are released to the outside of the tank (atmosphere) through the exhaust pipe together with the air in the air reservoir.

JP 2010-255882 A

  The open-type deaerator disclosed in Patent Document 1 is a hot water supply sprayed from a nozzle when the amount of hot water used in a circulating hot water supply system increases rapidly and the pressure of the hot water flowing through the outgoing pipe or return pipe decreases. When the amount of inflow of water decreases and the water level of hot water stored in the hot water storage section of the tank decreases, the air pressure in the tank's air pool becomes negative pressure, and outside air enters the tank through the exhaust pipe and enters the air pool. The remaining dissolved air, free carbonic acid and residual chlorine cannot be released to the atmosphere. Conversely, in a circulating hot water system, the amount of hot water used is drastically decreased, the pressure of hot water flowing through the outgoing pipe and the return pipe is increased, and the amount of hot water sprayed from the nozzle is increased. If the hot water level in the hot water rises more than necessary, the hot water closes the air outlet of the air supply pipe, so that air is not supplied from the air supply pipe to the air reservoir, and as a result, air is exhausted from the exhaust pipe. In other words, the dissolved air, free carbonic acid, and residual chlorine remaining in the air reservoir cannot be released to the atmosphere. In addition, since this open-type deaeration device cannot change the flow rate of hot water in the spill pump, the capacity of the spill pump is selected according to the pressure in the piping of the circulating hot water system of the building where the device is installed. It is necessary to customize and replace, and it takes labor and cost to replace the spill pump.

  The object of the present invention is to use dissolved oxygen separated from hot water even if the amount of hot water used in the circulating hot water system suddenly increases and the level of hot water stored in the hot water storage section of the tank changes. An object of the present invention is to provide an open type deaeration device capable of releasing free carbonic acid and residual chlorine to the atmosphere and a flow rate control method for controlling the flow rate of hot water flowing in the open type deaeration device. Another object of the present invention is to provide a solution that is separated from hot water even if the amount of hot water used in the circulating hot water system is drastically decreased and the level of hot water stored in the hot water storage section of the tank is changed. An object of the present invention is to provide an open type deaeration device capable of releasing oxygen, free carbonic acid and residual chlorine into the atmosphere, and a flow rate control method for controlling the flow rate of hot water flowing in the open type deaeration device.

  The first premise of the present invention for solving the above-mentioned problems is that a hot water storage part that stores hot water flowing in the circulating hot water system at a predetermined water level and an air pool part that is located above the hot water storage part and stores air. , A nozzle that is located in the air reservoir and sprays hot water, an outflow pipe that discharges hot water from the hot water storage section, and an outflow that is installed in the outflow pipe to force out hot water from the hot water storage section An open type equipped with a pump, an air supply pipe for supplying outside air to the air reservoir, and an exhaust pipe for releasing dissolved oxygen, free carbonic acid, and residual chlorine contained in the hot water from the air reservoir to the atmosphere together with air. Deaeration device.

The feature of the present invention in the first premise is that the open-type deaeration device determines the rotational speed of the flowing water pump and the sensor for measuring the level of hot water stored in the hot water storage unit or the pressure of the hot water stored in the hot water storage unit. While storing the correlation between the variable voltage or frequency and the hot water level or pressure measured by the sensor, the inflow and outflow of hot water flowing into the hot water storage unit from the nozzle based on the measurement signal sent from the sensor through tube so as to retain the balance between outflow of hot water flowing out from the hot water storage unit, and a controller for adjusting the flow rate of hot water flowing through the outlet pump, the controller of the hot water in the circulation hot water system The amount of hot water flowing in from the nozzle to the hot water storage section decreases, and the amount of hot water collected in the hot water storage section is lowered by the measurement signal sent from the sensor. Then, the voltage or frequency corresponding to the lowered water level or the reduced pressure indicated by the measurement signal sent from the sensor is applied to the correlation, and the rotation speed of the outflow pump is determined by the identified voltage or frequency. Decreasing the flow rate of hot water flowing to the outflow pump, drastically reducing the amount of hot water used in the circulating hot water system, and increasing the amount of hot water flowing into the hot water storage from the nozzle Then, if it is determined that the water level of the hot water accumulated in the hot water storage unit has risen according to the measurement signal sent from the sensor, the level of the hot water supplied by the measurement signal sent from the sensor applied to the correlation or the increased pressure The voltage or frequency corresponding to the is determined, and the rotation speed of the spill pump is increased by the identified voltage or frequency to flow to the spill pump. In increasing the hot water flow rate.

  As an example of the open-type deaerator of the present invention, the controller controls the rotational speed of the outflow pump using an inverter and adjusts the flow rate of hot water flowing through the outflow pump.

  As another example of the open-type deaerator of the present invention, the circulating hot water supply system includes an outgoing pipe through which hot water supplied from a hot water source flows, a return pipe for returning hot water to the hot water source, and a return pipe or a hot water source. A water supply pipe for replenishing water and a circulation pump for forcibly circulating hot water in the pipe are provided, and an open type deaeration device is installed in at least one of the outgoing pipe and the return pipe.

  The second premise of the present invention for solving the above problems is that dissolved oxygen, free carbonic acid, and residual chlorine contained in the hot water are made to correspond to fluctuations in the supply pressure of hot water flowing in the circulating hot water system. This is a flow rate control method for controlling the flow rate of the hot water flowing through the open deaerator to be removed.

In the second premise, the flow rate control method of the present invention is characterized in that the open-type deaeration device is located above the hot water storage section and the hot water storage section for storing hot water flowing in the circulating hot water supply system at a predetermined water level. A tank having an air reservoir for containing air, a nozzle for spraying hot water located in the air reservoir, an outflow pipe for discharging hot water from the hot water storage, and hot water from the hot water storage installed in the outflow pipe An exhaust pump that forcibly flows out air, an air supply pipe that supplies outside air to the air reservoir, and an exhaust pipe that releases dissolved oxygen, free carbonic acid, and residual chlorine contained in the hot water from the air reservoir to the atmosphere. The flow rate control method measures the water level or water pressure of the hot water accumulated in the hot water storage section of the open-type deaerator, and the amount of hot water used in the circulating hot water system increases rapidly. Incoming hot water flow If it is determined that the amount of hot water accumulated in the hot water storage section has dropped and the level of the hot water is lowered, it is applied to the correlation between the voltage or frequency that changes the rotational speed of the running water pump and the water level or pressure of the hot water. The voltage or frequency corresponding to the water level or the reduced pressure is identified, and the rotational speed of the spill pump is decreased by the identified voltage or frequency to reduce the flow rate of hot water flowing to the spill pump, which is used in the circulating hot water system. If it is determined that the amount of hot water used was drastically decreased, the amount of hot water flowing into the hot water storage unit from the nozzle increased, and the level of hot water accumulated in the hot water storage unit was raised, The voltage or frequency corresponding to the rising water level or the rising pressure is identified and applied to the outlet pump by the identified voltage or frequency. Speed increases to increase the flow rate of hot water flowing through the outlet pump, the outflow from the nozzles of the open deaerator hot water flowing out from the hot water storage unit through inflow hot water and the outflow pipe flowing into the hot water storage unit The purpose is to adjust the flow rate of hot water flowing through the outflow pump so that the balance with the amount can be maintained.

  According to the open-type deaeration device of the present invention, the sensor measures the water level of hot water accumulated in the hot water storage section, and the hot water flowing into the hot water storage section from the nozzle based on the measurement signal sent from the sensor. Since the controller adjusts the flow rate of hot water flowing through the outflow pump so as to maintain a balance between the inflow amount and the outflow amount of hot water flowing out of the hot water storage section through the outflow pipe, for example, hot water supply in a circulating hot water system The amount of water used increases rapidly, the pressure of hot water flowing through the outgoing pipe and return pipe decreases, the amount of hot water sprayed from the nozzle decreases, and the level of hot water collected in the hot water storage section of the tank Even if it changes so as to decrease, the flow rate of hot water flowing through the outflow pump is adjusted to maintain the balance between the inflow and outflow amount of hot water, and the water level of the hot water in the hot water storage section does not drop rapidly. ,Exhaust pipe Luo outside air entry into the tank can be prevented, dissolved oxygen and free carbon dioxide remaining in the air reservoir unit, the residual chlorine can be reliably discharged to the atmosphere along with air. In the open-type deaerator, the amount of hot water used in the circulating hot water system decreases rapidly, and the pressure of the hot water flowing in the outgoing pipe and return pipe rises, increasing the inflow of hot water sprayed from the nozzle. Even if the level of hot water stored in the hot water storage section of the tank changes, the balance between the inflow and outflow of hot water is maintained by adjusting the flow rate of the hot water flowing through the outflow pump. The level of hot water in the hot water supply will not rise more than necessary, and the supply pipe can be prevented from being blocked by the hot water, and dissolved oxygen, free carbonic acid, and residual chlorine remaining in the air pool will be released into the atmosphere together with air. Can do. An open-type deaerator functions reliably in a circulating hot water supply system, thereby removing dissolved oxygen, free carbonic acid, and residual chlorine contained in the hot water supply from the hot water supply. Corrosion of the pipe and return pipe can be prevented, and leakage of hot water from the pipe can be prevented.

When the controller determines that the amount of hot water flowing into the hot water storage unit from the nozzle decreases and the controller determines that the level of the hot water stored in the hot water storage unit has dropped due to the measurement signal sent from the sensor, Applying the correlation between the voltage or frequency that changes the rotation speed of the hot water and the level or pressure of the hot water measured by the sensor, the voltage corresponding to the lowered or lower pressure of the hot water indicated by the measurement signal sent from the sensor or to identify the frequency, to reduce the flow rate of the hot water flowing to the specified voltage or efflux pump to reduce the rotational speed of the outflow pump with frequency, since holding the balance between outflow and inflow, circulation hot water in the system The amount of hot water used in the water increases rapidly, the pressure of the hot water flowing through the outgoing and return pipes decreases, and the amount of hot water sprayed from the nozzle decreases. Even changed as the water level of the hot water storage unit to accumulated hot water in the tank is lowered, that the controller reduce the hot water flow rate of the efflux pump to hold the balance between the inflow of hot water and runoff, The hot water level in the hot water storage section does not drop sharply, preventing the entry of outside air from the exhaust pipe into the tank, and the dissolved oxygen, free carbonic acid, and residual chlorine remaining in the air pool section together with air. Can be reliably released.

The open-type deaeration device uses a flowing water pump when the flow rate of hot water flowing into the hot water storage unit from the nozzle increases and the controller determines that the level of hot water stored in the hot water storage unit has risen according to the measurement signal sent from the sensor. Applying the correlation between the voltage or frequency that changes the rotation speed of the hot water and the water level or pressure measured by the sensor, the voltage corresponding to the rising or rising pressure of the hot water indicated by the measurement signal sent from the sensor or to identify the frequency and increasing the flow rate of the hot water flowing to the specified voltage or efflux pump to increase the rotational speed of the outflow pump with frequency, since holding the balance between outflow and inflow, circulation hot water in the system The amount of hot water that is sprayed from the nozzle increases due to a sudden decrease in the amount of hot water used in Even changed as the water level of the hot water storage unit to accumulated hot water in the tank is increased, that the controller increases the hot water flow rate of the efflux pump to hold the balance between the inflow of hot water and runoff, The hot water level in the hot water storage section does not rise more than necessary, and the supply pipe can be prevented from being blocked by the hot water supply, and dissolved oxygen, free carbonic acid, and residual chlorine remaining in the air pool are released into the atmosphere together with the air. can do.

When the sensor is a pressure sensor that measures the pressure of hot water at the bottom of the hot water storage unit and sends the measurement signal to the controller, the pressure sensor accurately measures the water level of the hot water at the hot water storage unit. However, the measurement signal is sent to the controller, and the controller adjusts the flow rate of hot water flowing to the outflow pump based on the measurement signal sent from the pressure sensor, so that the balance between the inflow amount and the outflow amount is maintained. The amount of hot water used in the circulating hot water system suddenly increases, the pressure of hot water flowing through the outgoing and return pipes decreases, the amount of hot water sprayed from the nozzles decreases, and accumulates in the hot water storage section of the tank. Even if the hot water level changes so that the hot water level drops, the hot water level in the hot water storage section does not drop sharply, and the outside air can be prevented from entering the tank from the exhaust pipe. Dissolved oxygen and free carbon dioxide remaining in reservoir portion, the residual chlorine can be reliably discharged to the atmosphere along with air. In addition, the amount of hot water used in the circulating hot water system suddenly decreases, the pressure of hot water flowing through the outgoing pipe and return pipe rises, and the amount of hot water sprayed from the nozzle increases, so that the hot water storage section of the tank The controller adjusts the flow rate of hot water flowing through the spill pump to maintain the balance between the inflow and outflow amount of hot water even if the level of hot water accumulated in the water rises. The water level of hot water does not rise more than necessary, and the supply pipe can be prevented from being blocked by hot water, and dissolved oxygen, free carbonic acid, and residual chlorine remaining in the air pool can be released into the atmosphere together with air. it can.

  An open-type deaerator, in which the controller controls the rotational speed of the spill pump using an inverter and adjusts the flow rate of hot water flowing through the spill pump, controls the rotational speed of the spill pump by means of the inverter. The pump rotational speed can be quickly and smoothly dealt with a decrease or increase in the level of hot water in the hot water supply section, so that the balance between the inflow and outflow of hot water can be reliably maintained. It is possible to prevent a rapid decrease in the water level of the hot water in the section, and to prevent an excessive increase in the water level of the hot water in the hot water storage section. The open-type deaerator can control the flow rate of hot water in the spill pump freely by controlling the rotation speed of the spill pump with an inverter, so the pressure in the piping of the circulating hot water system of the building where the device is installed It is not necessary to select the capacity of the spill pump or to customize and replace the pump according to the difference, and it is possible to save labor and cost for replacing the spill pump.

When an open degasser is installed in at least one of the return pipe and return pipe of the circulating hot water system, dissolved oxygen, free carbonic acid, and residual chlorine contained in the hot water are removed from the hot water by the open degasser. Therefore, the corrosion of the outgoing pipe and the return pipe used in the circulating hot water supply system can be prevented, and the leakage of hot water from those pipes can be prevented. The open-type deaerator can be used for a circulating hot water supply system, so that maintenance of the outgoing pipe and return pipe can be performed regularly at a predetermined interval, so that no effort is required and the circulating hot water system is maintained. The cost can be reduced.

According to the flow rate control method of the present invention, the water level of hot water stored in the hot water storage section of the open-type deaerator is measured, and flows into the hot water storage section from the nozzle of the open-type degasser based on the measurement result. The flow rate of hot water flowing through the outflow pump is adjusted so that the balance between the inflow amount of hot water and the outflow amount of hot water flowing out of the hot water storage section through the outflow pipe can be maintained. The amount of hot water used in the tank suddenly increases, the pressure of the hot water flowing through the outgoing pipe and the return pipe decreases, the amount of hot water sprayed from the nozzle decreases, and the hot water collected in the hot water storage section of the tank Even if the water level changes, the voltage or frequency that changes the rotation speed of the running water pump is applied to the correlation between the water level or pressure measured by the sensor and the water level lowered or reduced pressure. Correspondence That identifies the voltage or frequency, by decreasing the flow rate of hot water flowing through the outflow pump to reduce the rotational speed of the outflow pump by specified voltage or frequency, of the hot water to adjust the hot water flow rate of the efflux pump The balance between the inflow and outflow is maintained, the hot water level in the hot water storage section does not drop sharply, it is possible to prevent outside air from entering the tank from the exhaust pipe, and it remains in the air pool Dissolved oxygen, free carbonic acid, and residual chlorine can be reliably released into the atmosphere together with air. In the open-type deaerator, the amount of hot water used in the circulating hot water system decreases rapidly, and the pressure of the hot water flowing in the outgoing pipe and return pipe rises, increasing the inflow of hot water sprayed from the nozzle. Even if the level of hot water stored in the hot water storage section of the tank changes so as to increase, it is applied to the correlation between the voltage or frequency that changes the rotational speed of the running water pump and the water level or pressure measured by the sensor. By specifying the voltage or frequency corresponding to the rising water level or the rising pressure of the hot water, and increasing the flow rate of the hot water flowing to the outflow pump by increasing the rotation speed of the outflow pump by the specified voltage or frequency, The balance between the inflow and outflow of hot water is adjusted by adjusting the hot water flow rate of the pump, and the hot water level in the hot water storage section does not rise more than necessary. That the air supply pipe clogging can be prevented, and the dissolved oxygen and free carbon dioxide remaining in the air reservoir unit, the residual chlorine can be released to the atmosphere along with air.

The systematic diagram of the circulating hot-water supply system containing the open-type deaeration apparatus shown as an example. The schematic block diagram of an open-type deaeration apparatus. The figure which shows an example of the correlation with the voltage or frequency stored in the controller, and a water level or pressure. The figure which shows the dissolved oxygen reduction effect verification result at the time of utilizing an open-type deaeration apparatus. The figure which shows the free carbonic acid reduction effect verification result at the time of utilizing an open-type deaeration apparatus. The figure which shows the residual chlorine reduction effect verification result at the time of utilizing an open-type deaeration apparatus.

  The details of the open-type degassing apparatus and the flow rate control method according to the present invention will be described below with reference to the accompanying drawings such as FIG. 1 showing the configuration of the open-type degassing apparatus 10 shown as an example. 2 is a schematic configuration diagram of the open-type deaeration device 10, and FIG. 3 is a diagram illustrating an example of the correlation between the voltage or frequency stored in the controller 31 and the water level or pressure. In FIG. 1, illustration of the building is omitted. In FIG. 2, the vertical direction is indicated by an arrow A, and the horizontal direction is indicated by an arrow B.

  The open-type deaerator 10 is installed in a central hot water supply type circulating hot water supply system 11 and effectively removes dissolved oxygen, free carbonic acid, and residual chlorine contained in hot water water 12 flowing in the system 11. In the flow rate control method, the flow rate of the hot water 12 flowing through the outflow pump 28 described later is controlled in accordance with the fluctuation of the supply pressure of the hot water 12 flowing in the circulating hot water system 11.

  The circulating hot water supply system 11 is installed in buildings such as welfare facilities for the elderly, hospitals, and accommodation facilities. As shown in FIG. 1, the circulating hot water supply system 11 includes a hot water tank 13 provided with a boiler (not shown), a circulation pump 14 and an elevated water tank 15, and hot water 12 supplied by the hot water tank 13. Is sent to each room (not shown) of the building. The hot water tank 13, the circulation pump 14, and the elevated water tank 15 are connected via a pipe. The piping is formed of an outgoing pipe 16 through which hot water 12 delivered from the hot water tank 13 flows, a return pipe 17 that returns the hot water 12 to the hot water tank 13, a return pipe 17, or a water supply pipe 18 that supplies water to the hot water tank 13. ing.

  The outgoing pipe 16 extends from the hot water storage tank 13, and the return pipe 17 is connected to the hot water storage tank 13. The water supply pipe 18 is connected from the elevated water tank 15 to the return pipe 17 or the hot water storage tank 13. The outgoing pipe 16 supplies hot water 12 to each room. A hot water tap 21 is attached to the outgoing pipe 16 extending to each chamber. By opening the hot water tap 21, the hot water 12 can be used in each room. A copper tube, a copper alloy tube, or a stainless tube is used for the outgoing tube 16 and the return tube 17.

  The hot water storage tank 13 heats the water supplied from the elevated water tank 15 through a boiler to make hot water 12, and stores a certain amount of the hot water 12 while sending the hot water 12 to the outgoing pipe 16. . When the hot water 12 is used in each room and the hot water 12 is insufficient, the elevated water tank 15 supplies the shortage of water to the return pipe 17 or the hot water tank 13 through the water supply pipe 18. The circulation pump 14 is installed in the return pipe 17 and circulates the hot water 12 in the outgoing pipe 16 and the return pipe 17.

  The open-type deaerator 10 is installed in the outgoing pipe 16. Note that the open-type degassing device 10 can be installed in the return pipe 17 or in the outgoing pipe 16 and the return pipe 17. As shown in FIG. 2, the open-type deaerator 10 includes a tank 22 and a nozzle 23, an inflow pipe 24 and an outflow pipe 25, an air supply pipe 26 and an exhaust pipe 27, an outflow pump 28 and an inverter 29, and a pressure sensor. 30 (sensor) and a controller 31.

  Although the three-dimensional shape of the tank 22 is not illustrated, the tank 22 is a rectangular parallelepiped box having six walls of a top bottom wall, front and rear walls, and both side walls, and is made of stainless steel or heat resistant resin. The three-dimensional shape of the tank 22 is not particularly limited, and the tank 22 may be a cylindrical box. The tank 22 has a hot water storage portion 32 located below the hot water storage portion 32 and an air reservoir 33 located above the hot water storage portion 32 (above the tank 22). The hot water storage section 32 stores (stores) a predetermined amount of hot water 12 at a predetermined water level L. The air reservoir 33 stores (stores) a predetermined amount of air (air containing dissolved oxygen, free carbonic acid, and residual chlorine when the open-type deaerator 10 is in operation). In FIG. 2, the water level L of the hot water 12 stored in the hot water storage unit 32 is substantially the lower half of the height of the tank 22, but the water level of the hot water 12 in the tank 22 is not particularly limited.

  The nozzles 23 are installed on both sides of the inflow pipe 24 in the lateral direction, and are arranged in the air reservoir 33. The nozzle 23 has a discharge port (not shown) at its upper end. The nozzle 23 is made of copper, copper alloy, stainless steel or heat resistant resin. As shown in FIG. 2, the nozzle 23 sprays the hot water 12 from its outlet toward the upper part of the air reservoir 32.

  The inflow pipe 24 diverges from the outgoing pipe 16 and enters the open type deaeration device 10, and is connected to the bottom wall of the tank 22. The inflow pipe 24 extends in the vertical direction of the tank 22, reaches the air reservoir 33 through the hot water storage section 32, and then extends in the lateral direction. The inflow pipe 24 is made of copper, copper alloy, stainless steel, or heat resistant resin. The inflow pipe 24 causes a part of the hot water 12 flowing through the forward pipe 16 to flow into the tank 22. On the inflow pipe 24 extending between the outgoing pipe 16 and the open type deaerator 10, an on-off valve 34 used for maintenance of the open type deaerator 10 is installed. An electromagnetic valve 35 is installed in the inflow pipe 24 extending inside the open type deaerator 10. The electromagnetic valve 35 is connected to the controller 31 via the interface 42.

  The outflow pipe 25 is connected to the bottom wall of the tank 22, and is connected to the forward pipe 16 after leaving the open type deaerator 10. The outflow pipe 25 is made of copper, copper alloy, stainless steel, or heat resistant resin. The outflow pipe 25 causes a predetermined amount of hot water 12 to flow out of the hot water storage section 32 of the tank 22, and returns the hot water 12 to the outgoing pipe 16. On the outflow pipe 25 extending between the open type deaeration device 10 and the outgoing pipe 16, an opening / closing valve 36 used during maintenance of the open type deaeration device 10 is installed. A check valve 37 that prevents a back flow of the hot water 12 into the inflow pipe 24 and the hot water storage tank 13 is installed in the forward pipe 16 that extends between the inflow pipe 24 and the outflow pipe 25.

  The air supply pipe 26 is connected to the bottom wall of the tank 22, extends in the tank 22 in the vertical direction, and reaches the air reservoir 33 through the hot water storage part 32. The supply pipe 26 is made of copper, copper alloy, stainless steel, or heat resistant resin (for example, heat resistant polyvinyl chloride). The air supply pipe 26 has an air inlet 38 that opens below the bottom wall of the tank 22, and an air outlet 39 that opens to the air reservoir 33 of the tank 22. The air supply pipe 26 supplies outside air to the air reservoir 33 of the tank 22.

  The exhaust pipe 27 is connected to the top wall of the tank 22, extends upward of the tank 22, and then extends in the lateral direction. The exhaust pipe 27 is made of copper, copper alloy, stainless steel, or heat resistant resin (for example, heat resistant polyvinyl chloride). The exhaust pipe 27 has an air inlet 40 that opens to the top wall and an air outlet 41 that opens above the top wall of the tank 22. The exhaust pipe 27 opens dissolved oxygen, free carbonic acid, and residual chlorine contained in the hot water 12 to the atmosphere together with air from the air reservoir 33.

  The outflow pump 28 is installed in the outflow pipe 25 extending between the open-type deaeration device 10 and the outgoing pipe 16. The outflow pump 28 forcibly causes a predetermined amount of hot water 12 to flow out from the hot water storage section 32 of the tank 22. The outflow pump 28 is connected to the inverter 29 via the interface 42. The inverter 29 is connected to the controller 31 via the interface 42, and controls the rotation speed of the outflow pump 28 (motor) by a variable voltage / variable frequency power source in accordance with a control signal from the controller 31.

  The pressure sensor 30 is installed on the bottom wall of the tank 22 and is connected to the controller 31 via the interface 42. The pressure sensor 30 measures the pressure (water pressure) of the hot water 12 stored in the hot water storage section 32 of the tank 22 (the hot water 12 at the bottom position of the hot water storage section 32), and sends the measured pressure to the controller 31. As the pressure sensor 30, it is preferable to use a pressure transmitter.

  The controller 31 is a microcomputer having a central processing unit (CPU or MPU) and a memory (main storage unit), and has a built-in data storage device. Input / output devices such as a numeric keypad unit (not shown) and a display (not shown) are connected to the controller 31 via an interface. The central processing unit of the controller 31 starts an application from the memory based on control by the operating system, and performs flow control of the open-type deaeration device 10 according to the started application. Further, the central processing unit of the controller 31 stops (OFF) or operates (ON) the open-type degassing device 10 and opens / closes the valve mechanism of the electromagnetic valve 35.

  The data storage device of the controller 31 stores the correlation between the voltage or frequency and the water level or pressure shown in FIG. In the correlation of FIG. 3, the horizontal axis indicates the water level or pressure of the hot water 12 accumulated in the hot water storage section 32 of the tank 22, and the vertical axis indicates the voltage or frequency of the inverter 29. This correlation is obtained by displaying a value obtained by measuring the voltage or frequency of the inverter 29 corresponding to the water level or pressure actually obtained using the open-type deaeration device 10 on a graph, and linearly approximating the relationship. is there. The correlation can be freely set via the numeric keypad unit of the controller 31.

  The distribution route of the hot water 12 in the circulating hot water system 11 will be described as follows. When the system 11 is activated, the circulation pump 14 is activated, and as shown by an arrow in FIG. 1, a necessary amount of water in the system 11 is supplied from the elevated water tank 15 to the hot water tank 13 through the water supply pipe 18. In the hot water tank 13, water is heated using a boiler, and the hot water 12 is kept at about 60 ° C.

  A predetermined amount of hot water 12 is stored in the hot water storage tank 13, and flows from the hot water storage tank 13 into the outgoing pipe 16, and then flows into the return pipe 17 through the outgoing pipe 16 as indicated by arrows in FIG. 1. . The hot water 12 that has flowed into the return pipe 17 again flows into the hot water storage tank 13 and is heated to a predetermined temperature by the boiler. In this way, the hot water is circulated in the order of the hot water storage tank 13 → the outgoing pipe 16 → the return pipe 17 → the hot water storage tank 13.

  When the hot-water tap 21 attached to the outgoing pipe 16 extending to each room of the building is opened, the occupant can use the hot water 12. When the hot water 12 is used, the amount of hot water 12 circulating in the forward pipe 16 and the return pipe 17 decreases, but the used amount of the hot water 12 is reduced from the elevated water tank 15 to the hot water tank 13. (Or the return pipe 17) is replenished, and the required amount of hot water 12 in the system 11 is maintained.

  When the power source (switch) of the open type deaerator 10 is turned on, the controller 31 opens the valve mechanism of the electromagnetic valve 35 and activates the open type deaerator 10 (outflow pump 28). Note that the on-off valves 34 and 36 installed in the inflow pipe 24 and the outflow pipe 25 are opened except during maintenance of the open-type deaeration device 10. When the open-type deaerator 10 is operated, a part of the hot water 12 flowing through the outgoing pipe 16 flows into the inflow pipe 24 branched from the outgoing pipe 16. Hot water 12 that has flowed into the inflow pipe 24 enters the nozzle 23 through the inflow pipe 24, and is sprayed from the outlet of the nozzle 23 toward the upper portion of the air reservoir 33 of the tank 22.

  Hot water 12 sprayed from the discharge port is heated to about 60 ° C. by a boiler, and is sprayed into the air reservoir 33 of the tank 22 in the form of mist or fine particles. To charge. The particulate hot water 12 filled in the air reservoir 33 is separated from dissolved oxygen, free carbonic acid, and residual chlorine contained therein. The hot-water supply water 12 from which dissolved oxygen, free carbonic acid, and residual chlorine are separated falls as water droplets in the air reservoir 33 of the tank 22 and falls into the hot water storage unit 32.

  The hot water 12 stored (stored) in the hot water storage section 32 of the tank 22 is maintained at a predetermined water level L in the hot water storage section 32, and a predetermined amount of the hot water 12 passes through the outflow pipe 25 by the outflow pump 28 to the outside of the tank 22. And then returned to the outgoing pipe 16 from the outlet pipe 25 again. In addition, the hot water 12 which flows through the outward pipe 16 without flowing into the open-type deaeration device 10 passes through the check valve 37, travels through the outward pipe 16, and goes to each chamber.

  The dissolved oxygen, free carbonic acid, and residual chlorine separated from the hot water 12 and remaining in the air reservoir 33 of the tank 22 enter the exhaust pipe 27 from the air inlet 40 of the exhaust pipe 27 together with the air of the air reservoir 33, The gas is discharged from the air outlet 41 through the exhaust pipe 27 to the outside (atmosphere) of the tank 22. The air outside the tank 22 (outside air) enters the air supply pipe 26 from the air inlet 38 of the air supply pipe 26 and flows into the air reservoir 33 through the air supply pipe 26 and from the air outlet 39.

  In the open-type deaeration device 10, air (outside air) is supplied to the air reservoir 33 through the air supply pipe 26, so that release of air remaining in the air reservoir 33 from the exhaust pipe 27 to the atmosphere is delayed. Done without. Since the air supply pipe 26 passes through the hot water storage section 32, the air supply pipe 26 is heated by the hot water 12 accommodated in the hot water storage section 32, and the air in the air supply pipe 26 is heated. Air flows from the air supply inlet 38 toward the air outlet 39. Further, the air existing in the air reservoir 33 flows from the air reservoir 33 toward the air supply inlet 40 of the exhaust pipe 27, and the air in the exhaust pipe 27 flows from the air inlet 40 of the exhaust pipe 27 to the air flow. The air flows toward the outlet 41, and air containing dissolved oxygen, free carbonic acid, and residual chlorine is smoothly discharged from the exhaust pipe 27 to the atmosphere.

  The pressure sensor 30 continuously measures the pressure (water pressure) at the bottom position of the hot water storage portion 32 of the hot water 12 accumulated in the hot water storage portion 32 of the tank 22 and sends a measurement signal (measured value) to the controller 31. Based on the measurement signal sent from the pressure sensor 30, the controller 31 flows out the hot water 12 flowing from the nozzle 23 into the hot water storage unit 32 and the hot water 12 flowing out of the hot water storage unit 32 through the outflow pipe 25. The hot water flow rate of the outflow pump 28 is adjusted so as to maintain a balance with the amount.

  Specifically, the controller 31 applies the measurement signal (measured value) sent from the pressure sensor 30 to the correlation between the voltage or frequency stored in the data storage device and the water level or pressure, and corresponds to the water level or pressure. The specified voltage or frequency is specified, and the specified voltage or frequency is output to the inverter 29 as a control signal. The inverter 29 controls the rotational speed of the outflow pump 28 (motor) with a variable voltage / variable frequency power supply in accordance with a control signal output from the controller 31. The outflow pump 28 is maintained at a predetermined value by the control of the inverter 29, and causes a predetermined amount of hot water 12 to flow out from the hot water storage section 32 of the tank 22.

  In a usage state of the system 11 in which a large amount of hot water 12 is not used, the flow rate of the hot water 12 circulating through the outgoing pipe 16 and the return pipe 17 does not greatly increase and decrease, and the controller 31 rotates the outflow pump 28 (motor). The amount of hot water 12 flowing into the hot water storage unit 32 and the amount of hot water 12 flowing out of the hot water storage unit 32 are maintained so that the speed is kept constant and the water level L of the hot water 12 accumulated in the hot water storage unit 32 is maintained constant. Maintain balance with runoff. In this case, in the open-type deaerator 10, as described above, the hot water 12 is sprayed from the nozzle 23, and dissolved oxygen, free carbonic acid, and residual chlorine contained in the hot water 12 are separated from the hot water 12 and dissolved. Hot water 12 from which oxygen, free carbonic acid, and residual chlorine have been removed is returned from the hot water storage section 32 to the outgoing pipe 16.

  Next, the control operation of the controller 31 when a large amount of hot water 12 is used in the circulating hot water system 11 and the usage amount of the hot water 12 rapidly increases in the system 11 will be described. When the hot water tap 21 attached to the outgoing pipe 16 is opened and a large amount of hot water 12 is used, the used decrease in the hot water 12 is supplied from the elevated water tank 15 to the hot water tank 13. However, the supply pressure of the hot water 12 that circulates in the outgoing pipe 16 and the return pipe 17 decreases. When the supply pressure of the hot water 12 circulating through the outgoing pipe 16 and the return pipe 17 decreases, the flow rate of the hot water 12 flowing from the inflow pipe 24 into the tank 22 of the open-type deaeration device 10 decreases, and hot water is stored from the nozzle 23. The amount of hot water 12 flowing into the portion 32 decreases, and the water level L of the hot water 12 accumulated in the hot water storage portion 32 gradually decreases.

  When the water level L of the hot water supply 12 gradually decreases in the hot water storage section 32, the pressure measured by the pressure sensor 30 decreases. When the controller 31 determines that the water level L of the hot water 12 accumulated in the hot water storage section 32 has been lowered based on the measurement signal (measured value) sent from the pressure sensor 30, the controller 31 decreases the flow rate of the hot water 12 flowing to the outflow pump 28. The balance between the inflow amount of the hot water 12 flowing into the hot water storage section 32 and the outflow amount of the hot water water 12 flowing out of the hot water storage section 32 is maintained.

  The controller 31 fits the correlation between the voltage or frequency stored in the data storage device and the water level or pressure, and the water level (the water level L lowered by the use of the hot water supply water 12) or the pressure (lowered by the use of the hot water supply water 12). The voltage or frequency corresponding to the supply pressure) is specified, and the specified voltage or frequency is output to the inverter 29 as a control signal. The inverter 29 reduces the rotation speed of the outflow pump 28 with a variable voltage / variable frequency power supply according to the control signal output from the controller 31. The rotation speed of the outflow pump 28 is reduced by the control by the inverter 29. When the rotation speed of the outflow pump 28 decreases, the amount of hot water 12 flowing out of the hot water storage section 32 of the tank 22 decreases. In this case, in the open-type deaerator 10, hot water 12 is sprayed from the nozzle 23, and dissolved oxygen, free carbonic acid, and residual chlorine contained in the hot water 12 are separated from the hot water 12, and dissolved oxygen, free carbonic acid, and residual The hot water 12 from which chlorine has been removed is returned from the hot water storage section 32 to the outgoing pipe 16.

  The flow rate control method for controlling the flow rate of the hot water supply water 12 flowing through the open degassing device 10 and the open degassing device 10 causes the usage amount of the hot water hot water 12 to rapidly increase in the circulating hot water supply system 11. The pressure of the hot water 12 circulating through the return pipe 17 decreases, the amount of hot water 12 sprayed from the nozzle 23 decreases, and the water level L of the hot water 12 accumulated in the hot water storage section 32 of the tank 22 decreases. Even if it does, since the controller 31 reduces the flow rate of the hot water 12 flowing to the outflow pump 28 and maintains the balance between the inflow amount and the outflow amount of the hot water 12, the water level L of the hot water 12 in the hot water storage section 32 suddenly increases. It is possible to prevent the outside air from entering from the exhaust pipe 27 to the air reservoir 33 of the tank, and the dissolved oxygen, free carbonic acid, and residual chlorine remaining in the air reservoir 33 together with the air. It is possible to reliably released into the atmosphere.

Next, the control operation of the controller 31 when the use of a large amount of hot water 12 that has been used in the circulating hot water supply system 11 rapidly decreases will be described. When the hot water tap 21 attached to the outgoing pipe 16 is closed and the use of the hot water 12 that has been used in large quantities decreases, the water pressure of the hot water 12 circulating through the outgoing pipe 16 and the return pipe 17 increases.

  When the supply pressure of the hot water 12 circulating through the outgoing pipe 16 and the return pipe 17 rises, the flow rate of the hot water 12 flowing into the open-type deaerator 10 from the inflow pipe 24 increases and from the nozzle 23 to the hot water storage section 32. The inflow amount of the hot water 12 flowing in increases, and the water level L of the hot water 12 accumulated in the hot water storage section 32 gradually increases. Note that the flow rate of the hot water 12 delivered by the outflow pump 28 at this time is a flow rate corresponding to a case where the usage amount of the hot water 12 is rapidly increased in the system 11.

  As the water level L of the hot water 12 gradually increases, the pressure measured by the pressure sensor 30 increases. When the controller 31 determines that the water level L of the hot water 12 accumulated in the hot water storage unit 32 has risen based on the measurement signal (measured value) sent from the pressure sensor 30, the controller 31 increases the flow rate of the hot water 12 flowing to the outflow pump 28. The balance between the inflow amount of the hot water 12 flowing into the hot water storage section 32 and the outflow amount of the hot water water 12 flowing out of the hot water storage section 32 is maintained.

  The controller 31 applies the correlation between the voltage or frequency stored in the data storage device and the water level or pressure, and the water level (the water level that has risen due to the stop of the use of the hot water 12) or the pressure (by the use of the hot water 12 is stopped). The voltage or frequency corresponding to the increased pressure) is specified, and the specified voltage or frequency is output to the inverter 29 as a control signal. The inverter 29 increases the rotational speed of the outflow pump 28 by a variable voltage / variable frequency power source according to the control signal output from the controller 31. The flow rate of the outflow pump 28 is increased by the control of the inverter 29.

  When the rotation speed of the outflow pump 28 increases, the amount of hot water 12 flowing out of the hot water storage section 32 of the tank 22 increases. In this case, in the open-type deaerator 10, hot water 12 is sprayed from the nozzle 23, and dissolved oxygen, free carbonic acid, and residual chlorine contained in the hot water 12 are separated from the hot water 12, and dissolved oxygen, free carbonic acid, and residual The hot water 12 from which chlorine has been removed is returned from the hot water storage section 32 to the outgoing pipe 16.

  The flow rate control method for controlling the flow rate of the hot water supply 12 flowing through the open degassing device 10 and the open degassing device 10 causes the usage amount of the hot water 12 to rapidly decrease in the circulating hot water supply system 11, The supply pressure of the hot water 12 circulating through the return pipe 17 rises so that the inflow amount of the hot water 12 sprayed from the nozzle 23 increases, and the water level L of the hot water 12 accumulated in the hot water storage section 32 of the tank 22 increases. Even if there is a change, the controller 31 increases the flow rate of the hot water 12 flowing to the outflow pump 28 to maintain the balance between the inflow amount and the outflow amount of the hot water 12 so that the water level L of the hot water 12 in the hot water storage section 32 is It does not rise more than necessary, and it is possible to prevent the air outflow portion 39 of the air supply pipe 26 from being clogged with the hot water 12, and to dissolve dissolved oxygen, free carbonic acid, and residual chlorine remaining in the air pool 33 with air. It can be released to monitor the atmosphere.

  FIG. 4 is a diagram showing a verification result of the dissolved oxygen reduction effect when the open degassing device 10 is used, and FIG. 5 shows a free carbon dioxide reduction effect verification result when the open degassing device 10 is used. FIG. FIG. 6 is a diagram showing the results of verifying the residual chlorine reduction effect when the open-type degassing device 10 is used. In these drawings, no degassing without operating the open-type degassing apparatus 10 is indicated by a dotted line, and the presence of degassing when the open-type degassing apparatus 10 is operated is indicated by a solid line.

  As shown in the results of verifying the dissolved oxygen reduction effect in FIG. 4, the dissolved oxygen contained in the hot water 12 is removed from the hot water 12 even if time has passed without degassing without operating the open-type degassing device 10. It can be seen that dissolved oxygen remains in hot water 12 at a high concentration. On the other hand, in the case of degassing with the open-type degassing device 10 operated, dissolved oxygen contained in the hot water 12 is gradually removed from the hot water 12 over time, and the concentration of dissolved oxygen in the hot water 12 is degassed. The level can be lower than none. Therefore, it can be seen that the open type deaerator 10 and the flow rate control method for controlling the flow rate of the hot water 12 flowing through the open type deaerator 10 are extremely effective in removing dissolved oxygen contained in the hot water 12.

  The flow rate control method for controlling the flow rate of the open-type degassing device 10 and the hot-water supply water 12 flowing through the open-type degassing device 10 ensures that the dissolved oxygen removal function functions in the circulating hot-water supply system 11. Since the dissolved oxygen contained can be removed from the hot water supply water 12 and the concentration of dissolved oxygen in the hot water supply water 12 can be lowered, the corrosion of the outgoing pipe 16 and the return pipe 17 used in the circulating hot water supply system 11. It is possible to prevent the leakage of hot water 12 from the outgoing pipe 16 and the return pipe 17.

  Further, as shown in the verification result of the free carbonic acid reduction effect in FIG. 5, the free carbonic acid contained in the hot water supply water 12 is removed from the hot water supply water 12 even if time passes without deaeration without operating the open-type deaeration device 10. It can be seen that free carbon dioxide remains in the hot water supply water 12 at a high concentration without being removed. On the other hand, in the case of degassing with the open-type degassing device 10 operated, free carbon dioxide contained in the hot water 12 is gradually removed from the hot water 12 over time, and the concentration of free carbon in the hot water 12 is degassed. The level can be lower than none. Therefore, it can be seen that the open type deaerator 10 and the flow rate control method for controlling the flow rate of the hot water 12 flowing through the open type deaerator 10 are extremely effective in removing free carbonic acid contained in the hot water 12.

  The flow rate control method for controlling the flow rate of the open-type degassing device 10 and the hot-water supply water 12 flowing through the open-type degassing device 10 ensures that the free carbonic acid removing function functions in the circulating hot-water supply system 11, thereby The contained free carbonic acid can be removed from the hot water supply water 12, and the concentration of free carbonic acid in the hot water supply water 12 can be lowered. Therefore, the corrosion of the outgoing pipe 16 and the return pipe 17 used in the circulating hot water supply system 11 It is possible to prevent the leakage of hot water 12 from the outgoing pipe 16 and the return pipe 17.

  Furthermore, as shown in the residual chlorine reduction effect verification result in FIG. 6, even if time has elapsed without deaeration without operating the open-type deaeration device 10, the residual chlorine contained in the hot water supply water 12 is from the hot water supply water 12. Although it is not effectively removed, the concentration gradually decreases, but it can be seen that the concentration of residual chlorine stops at a high level as compared with the case with deaeration. On the other hand, in the case of deaeration with the open-type deaerator 10 operated, a large amount of residual chlorine contained in the hot water 12 is removed from the hot water 12 over time, and the concentration of residual chlorine in the hot water 12 is removed. The level can be lower than that without care. Therefore, it can be seen that the open type deaerator 10 and the flow rate control method for controlling the flow rate of the hot water 12 flowing through the open type deaerator 10 are extremely effective in removing residual chlorine contained in the hot water 12.

  The flow rate control method for controlling the flow rate of the open-type degassing device 10 and the hot-water supply water 12 flowing through the open-type degassing device 10 ensures that the residual chlorine removal function functions in the circulating hot-water supply system 11. The residual chlorine contained can be removed from the hot water supply water 12 and the concentration of residual chlorine in the hot water supply water 12 can be reduced to a low level. Therefore, the corrosion of the outgoing pipe 16 and the return pipe 17 used in the circulating hot water supply system 11 It is possible to prevent the leakage of hot water 12 from the outgoing pipe 16 and the return pipe 17.

DESCRIPTION OF SYMBOLS 10 Open type deaeration device 11 Circulating hot water supply system 12 Hot water supply water 13 Sealed hot water storage tank 14 Circulation pump 15 Elevated water tank 16 Outward pipe 17 Return pipe 18 Water supply pipe 22 Tank 23 Nozzle 24 Inflow pipe 25 Outflow pipe 26 Air supply pipe 27 Exhaust pipe 28 Outflow pump 29 Inverter 30 Pressure sensor (sensor)
31 Controller 32 Hot Water Storage Unit 33 Air Storage Portion 38 Air Inlet 39 Air Outlet 40 Air Inlet 41 Air Outlet L Water Level

Claims (4)

A hot water storage part that stores hot water flowing in the circulating hot water system at a predetermined water level, a tank that is located above the hot water storage part and has an air storage part that stores air, and hot water supply that is located in the air storage part A nozzle for spraying hot water, an outflow pipe for flowing hot water from the hot water storage section, an outflow pump installed in the outflow pipe for forcibly flowing hot water from the hot water storage section, and supplying air to the air reservoir In an open type deaeration device comprising an air supply pipe to be ventilated, and an exhaust pipe for releasing dissolved oxygen, free carbonic acid, and residual chlorine contained in hot water from the air reservoir to the atmosphere together with air,
The open-type deaeration device measures a water level of hot water stored in the hot water storage unit or a pressure of hot water stored in the hot water storage unit, a voltage or frequency for changing a rotation speed of the flowing water pump, and the sensor. The amount of hot water flowing into the hot water storage section from the nozzle and the outflow pipe based on the measurement signal sent from the sensor while storing the correlation with the water level or pressure measured by the A controller for adjusting the flow rate of hot water flowing through the outflow pump so as to maintain a balance with the outflow amount of hot water flowing out from the hot water storage section,
In the circulating hot water supply system, the controller rapidly increases the amount of hot water used, reduces the amount of hot water flowing into the hot water storage unit from the nozzle, and uses the measurement signal sent from the sensor to measure the hot water storage unit. If it is determined that the level of hot water stored in the water has dropped, the voltage or frequency corresponding to the lowered water level or the reduced pressure indicated by the measurement signal sent from the sensor is applied to the correlation, The rotational speed of the spill pump is reduced by the specified voltage or frequency to reduce the flow rate of hot water flowing to the spill pump,
The controller uses a large amount of hot water used in the circulating hot water system to rapidly decrease, and an inflow amount of hot water flowing into the hot water storage unit from the nozzle increases and is sent from the sensor. When it is determined by the measurement signal that the level of the hot water stored in the hot water storage unit has increased, the voltage corresponding to the increased level or the increased pressure of the hot water indicated by the measurement signal sent from the sensor by applying the correlation Alternatively , the open type deaerator is characterized in that the frequency is specified and the flow rate of hot water flowing through the outflow pump is increased by increasing the rotational speed of the outflow pump by the specified voltage or frequency . The open-type deaerator according to claim 1 , wherein the controller controls the rotational speed of the outflow pump using an inverter to adjust the flow rate of hot water flowing through the outflow pump . The circulating hot water system includes an outgoing pipe through which hot water supplied from a hot water source flows, a return pipe for returning hot water to the hot water source, a water supply pipe for supplying water to the return pipe or the hot water source, and these pipes The opening according to claim 1 or 2 , further comprising a circulation pump for forcibly circulating hot water, and wherein the open-type degassing device is installed in at least one of the outgoing pipe and the return pipe. Type deaerator. The flow rate of the hot water flowing through the open-type deaerator for removing dissolved oxygen, free carbonic acid and residual chlorine contained in the hot water is controlled in response to fluctuations in the supply pressure of the hot water flowing in the circulating hot water system. In the flow control method to
The open-type deaeration device includes a hot water storage unit that stores hot water flowing in a circulating hot water supply system at a predetermined water level, a tank that is located above the hot water storage unit and stores an air, and the air A nozzle that is located in a pool portion and sprays hot water, an outflow pipe that discharges hot water from the hot water storage section, an outflow pump that is installed in the outflow pipe and forcibly discharges hot water from the hot water storage section; An air supply pipe for supplying outside air to the air reservoir, and an exhaust pipe for releasing dissolved oxygen, free carbonic acid, and residual chlorine contained in the hot water from the air reservoir to the atmosphere,
In the flow rate control method, while measuring the level or water pressure of hot water stored in the hot water storage section of the open-type deaerator, the amount of hot water used in the circulating hot water system increases rapidly, and the hot water storage from the nozzle is performed. When it is determined that the amount of hot water flowing into the hot water flowing in decreases and the level of hot water stored in the hot water storage has decreased, the voltage or frequency for changing the rotational speed of the flowing water pump, the water level or pressure of the hot water The voltage or frequency corresponding to the lowered water level or the lowered pressure is specified by applying the correlation, and the rotating speed of the outflow pump is decreased by the specified voltage or frequency to flow to the outflow pump. Reduce the water flow,
In the flow rate control method, a large amount of hot water used in the circulating hot water system is drastically reduced, and an inflow amount of hot water flowing into the hot water storage unit from the nozzle is increased. When it is determined that the level of the accumulated hot water is raised, the voltage or frequency corresponding to the raised water level or the raised pressure is specified by applying the correlation, and the rotation of the outflow pump is determined by the identified voltage or frequency. Increase the flow rate to increase the flow rate of hot water flowing to the outflow pump, and flow out of the hot water storage unit through the nozzle of the open-type degasser and the hot water storage unit through the outflow pipe. A flow rate control method characterized by adjusting a flow rate of hot water flowing through the outflow pump so as to maintain a balance with an outflow amount of hot water .

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