JP2012145298A - Liquid supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid supply device capable of adjusting the amount of liquids supplied from respective liquid supply parts to a liquid supply port precisely and quickly.SOLUTION: The liquid supply device supplies the liquids from a plurality of liquid supply parts connected in parallel with one another to a common liquid supply location, and includes a supply amount detecting means which detects the amount of the liquids supplied from each liquid supply part to the liquid supply port and a flow rate adjusting means which adjusts the amount of the liquids supplied from each liquid supply part. The liquid supply device further includes a normal operation control in which the liquid is supplied from each liquid supply part to the liquid supply location and an upper limit supply amount setting control performed prior to normal operation control in which the upper limit supply amount of the liquid for each liquid supply part is set. In the upper limit supply amount setting control, the liquid is supplied in such a state that a supposed supply amount for each liquid supply part is aligned, the actual supply amount is detected for each liquid supply part and, based on the actual supply amount detected for each liquid supply part, the upper limit supply amount in the normal operation control is set for each liquid supply part.

Description

  The present invention relates to a liquid supply apparatus that collects liquids supplied from a plurality of liquid supply units connected in parallel and discharges them from a liquid supply port.

  As a liquid supply apparatus, for example, there is a hot water supply apparatus that supplies high-temperature water heated from room temperature water as a liquid. In general, the hot water supply apparatus performs heat pump operation using nighttime electric power, which is an electricity bill discount time zone, and heats room temperature water to high temperature water of, for example, 65 ° C. to 90 ° C. and stores it in a tank. Has been. And when a faucet opens at the time of high temperature water use, a hot water heater mixes normal temperature water with the high temperature water in a tank, and makes hot water at appropriate temperature water, for example, about 42 degreeC.

  Moreover, as a liquid supply apparatus, there exist some which connect a plurality of tanks in parallel, collect hot water stored in the plurality of tanks, and discharge hot water from a common hot water flow path (see, for example, Patent Document 1). .

  By the way, when a plurality of tanks are connected in parallel and used, a difference occurs in the amount of hot water in each tank, and the amount of remaining hot water in the tank may differ. In order to prevent this, in Patent Document 1, the amount of remaining hot water in each of the plurality of tanks is measured, the amount of water injected into each tank is adjusted based on the amount of remaining hot water in each tank, and the amount of remaining hot water is made uniform. It has been proposed to make the amount of hot water uniform.

JP 2005-134063 A

  However, the conventional liquid supply apparatus detects a deviation in the amount of hot water supply based on the time taken for the amount of remaining hot water in the tank to change. For this reason, the amount of hot water supply is indirectly calculated based on the amount of remaining hot water in the tank, and there is a problem that the accuracy is not high. Further, since it is necessary to store hot water in the tank prior to adjusting the amount of hot water, for example, when performing an operation for adjusting the deviation of the amount of hot water during installation, there is a problem that it takes time.

  Therefore, an object of the present invention is to provide a liquid supply apparatus that can adjust the supply amount of liquid supplied from each liquid supply unit to the liquid supply port with high accuracy and in a short time.

  The present invention is a liquid supply device for supplying liquid from a plurality of liquid supply units connected in parallel to a common liquid supply location, wherein the liquid supplied from each liquid supply unit to the liquid supply port A normal operation control that includes a supply amount detecting means for detecting a supply amount and a flow rate adjusting means for adjusting a supply amount of the liquid from each liquid supply section, and supplying the liquid from each liquid supply section to the liquid supply location And an upper limit supply amount setting control for setting an upper limit supply amount of liquid for each liquid supply unit, which is performed prior to the normal operation control, and in the upper limit supply amount setting control, for each liquid supply unit The actual supply amount is detected for each of the liquid supply units by supplying the liquid in a state where the assumed supply amounts are matched, and the normal operation control is performed based on the detected actual supply amount of each of the liquid supply units The upper limit supply amount is set for each of the liquid supply units.

  ADVANTAGE OF THE INVENTION According to this invention, adjustment of the supply amount of the liquid supplied to the said liquid supply port from each liquid supply part can be performed with high precision and for a short time.

It is a block block diagram of 1st Embodiment of this invention. It is a block block diagram of the heating part of one Embodiment of this invention. It is a flowchart which shows the front | former stage of the process of the liquid supply adjustment control of one Embodiment of this invention. It is a flowchart which shows the back | latter stage of the process of liquid supply adjustment control of one Embodiment of this invention. It is a process flowchart of the liquid supply adjustment control at the normal time of one Embodiment of this invention.

  Hereinafter, embodiments of the liquid supply apparatus of the present invention will be described. In addition, the heat pump water heater is demonstrated as one Embodiment of the liquid supply apparatus of this invention.

(overall structure)
First, the overall configuration of the first embodiment of the present invention will be described. FIG. 1 shows a block diagram of a first embodiment of the present invention.

  The liquid supply apparatus 100 of the present embodiment is a hot water supply apparatus, in which high-temperature liquids (hot water) supplied from three liquid supply units 201, 202, and 203 connected in parallel are gathered from a liquid supply port 301. It is set as the structure discharged | emitted (tapping out).

  The three liquid supply units 201, 202, and 203 are connected in parallel to each other. For example, a heating unit 211 that heats liquid at room temperature and a tank unit that stores high-temperature liquid heated by the heating unit 211, respectively. 212. The high-temperature liquid heated by the heating units 211 of the three liquid supply units 201, 202, and 203 and stored in the tank unit 212 is collected at the liquid supply port 301 and discharged (hot water).

(Flow sensor / Flow adjustment valve)
Next, the supply amount detection means for detecting the supply amount of the liquid supplied from the liquid supply units 201, 202, 203 to the liquid supply port 301, and the supply amount of the liquid from each of the liquid supply units 201, 202, 203 are The flow rate adjusting means to be adjusted will be described.

  The supply amount detection means includes a flow rate sensor 401 provided in each of the liquid supply units 201, 202, and 203. Further, the flow rate adjusting means is constituted by a flow rate adjusting valve 501 provided in each liquid supply unit 201, 202, 203.

  Specifically, between the liquid supply unit 201 and the liquid supply port 301, a flow rate sensor 401 a that measures the flow rate of the high-temperature liquid supplied from the liquid supply unit 201, and the liquid supply unit 201 to the liquid supply port 301. A flow rate adjustment valve 501a for adjusting the flow rate of the high-temperature liquid supplied to the is provided. Similarly, between the liquid supply unit 202 and the liquid supply port 301, a flow rate sensor 401 b that measures the flow rate of the high-temperature liquid heated by the liquid supply unit 202, and the liquid supply unit 202 to the liquid supply port 301. A flow rate adjusting valve 501b for adjusting the flow rate of the heated high-temperature liquid supplied to is provided. Further, similarly between the liquid supply unit 203 and the liquid supply port 301, a flow rate sensor 401c that measures the flow rate of the high-temperature liquid supplied from the liquid supply unit 203 to the liquid supply port 301, and the liquid supply unit 203 A flow rate adjustment valve 501c for adjusting the flow rate of the high-temperature liquid supplied from the liquid supply port 301 to the liquid supply port 301 is provided.

  Note that the flow sensors 401a, 401b, and 401c are collectively referred to as a flow sensor 401. Similarly, the flow rate adjusting valves 501a, 501b, and 501c are collectively referred to as the flow rate adjusting valve 501.

  In this embodiment, the flow rate sensor 401 is provided on the liquid supply port 301 side of each of the tank units 212 of the liquid supply units 201, 202, and 203 and on the downstream side of the tank unit 212. It may be provided on the upstream side. In short, as long as the flow rate of the liquid supplied to the liquid supply port 301 from each tank unit 212 of the liquid supply units 201, 202, and 203 can be detected, the installation position is It is not limited. The flow rate adjusting valves 501 a, 501 b, and 501 c are also provided on the liquid supply port 301 side and the downstream side of the tank unit 212 of each tank unit 212 of the liquid supply units 201, 202, and 203. It may be provided on the upstream side. In short, if it is a position where the flow rate of the liquid supplied from the tank part 212 of each of the liquid supply parts 201, 202, 203 to the liquid supply port 301 can be adjusted, its installation position Is not limited.

  The flow sensor 401 is configured by any one of a flow sensor of an impeller type, a Coriolis type, a Kalman type, an electromagnetic type flow sensor, and the like. As described above, the flow sensor 401 is provided in each of the liquid supply units 201, 202, and 203. Speaking of the liquid supply unit 201, the flow rate sensor 401a measures the flow rate of the high-temperature liquid supplied from the liquid supply unit 201 to the liquid supply port 301 via the flow rate adjustment valve 501a, and the measured value is used as the liquid supply unit 201. To the control unit 237 (see FIG. 2).

  For example, the flow rate adjusting valve 501 a is provided between the flow rate sensor 401 a and the liquid supply port 301, and the flow rate of the high-temperature liquid supplied from the liquid supply unit 201 to the liquid supply port 301 is controlled by the control unit of the liquid supply unit 201. It adjusts by the command from 237 (refer FIG. 2). The other flow rate adjusting valves 501a and 501c are the same as the flow rate adjusting valve 501a.

  The control unit 237 (see FIG. 2) of the liquid supply unit 201 measures the flow rate measured by the flow rate sensors 401 (401a, 401b, 401c) of the three liquid supply units 201, 202, and 203, as will be described later. Collecting signals and adjusting the flow rate of the three liquid supply units 201, 202, and 203 so that the deviation of the flow rate of the high-temperature liquid supplied from the three liquid supply units 201, 202, and 203 to the liquid supply port 301 is reduced. The valve 501 (501a, 501b, 501c) is controlled. The flow rate adjustment control method in the control unit 237 of the liquid supply unit 201 will be described later.

(Liquid supply part)
Next, the liquid supply units 201, 202, and 203 will be described. Since all three liquid supply units 201, 202, and 203 have the same configuration, the liquid supply unit 201, which is one of them, will be described as an example.

  The liquid supply unit 201 is connected to the heating unit 211 that heats the liquid, the tank unit 212 that stores the high-temperature liquid heated by the heating unit 211 (see the dotted frame in the drawing), and the upstream side of the tank unit 212. The pressure reducing valve 213 is provided.

  Of these, the heating unit 211, as will be described in detail later, heats a normal temperature liquid (normal temperature water) supplied from the lower part of the tank unit 212 via a pipe line by a heat pump heating device using heat pump technology. And it supplies to the upper part of the tank part 212 via a pipe line.

  As will be described in detail later, the tank unit 212 has a configuration in which three tanks 221, 222, and 223 are connected in series in this order when viewed from the liquid supply port 301 side. The three tanks 221, 222, and 223 have a heat insulating structure, and the inside is operated in a full state. In addition, it is assumed that such a liquid supply apparatus having a large number of tanks is used in facilities that use a large amount of hot water, such as restaurants, welfare facilities, and accommodation facilities.

  A heating unit 211 (exit side) is connected to the upper portion of the tank 221 and a liquid supply port 301 is connected via a flow rate sensor 401a and a flow rate adjustment valve 501a. In addition, a liquid injection port 601 is connected to the lower part of the tank 223 via a pressure reducing valve 213, and a heating unit 211 (incoming side) is connected. 1 shows an example in which the tank unit 212 is composed of three tanks, such as tanks 221, 222, and 223, the number of tanks may be one, two, or four or more. .

  When the pressure on the tank unit 212 side (secondary side pressure) is reduced from the pressure on the liquid injection port 601 side (primary side pressure), the pressure reducing valve 213 opens a valve body (not shown), and the tank unit 212 extends from the liquid injection port 601. Inject liquid at room temperature (normal temperature water). That is, the inside of the tank unit 212 (respective tanks 221, 222, and 223) is pressurized by the pressure on the liquid injection port 601 side through the pressure reducing valve 213.

(Heating section)
Next, the heating unit 211 will be described. FIG. 2 is a block diagram of the heating unit 211 according to the first embodiment of the present invention.

  The heating unit 211 is, for example, a heat pump type heating device. As shown in FIG. 2, the compressor 231, the liquid heat medium heat exchanger 232, the expansion valve 233, the air heat exchanger 234, the air blowing unit 235, the pump 236, A control unit 237, a temperature sensor 238, a heat medium pipe 239, and a liquid pipe 240 are provided. The heating unit 211 is not limited to a heat pump type heating device, and may be a heating device using an electric heater or the like.

  The compressor 231, the liquid heat medium heat exchanger 232, the expansion valve 233, and the air heat exchanger 234 are configured in a closed loop connected in a ring shape via a heat medium pipe 239, and the heat medium is enclosed therein. Thus, a circulating heat pump heat medium circuit is configured. The heat medium is, for example, a heat medium gas. This heat medium gas may be carbon dioxide gas. Further, instead of gas, for example, heat exchange via a liquid containing a latent heat storage material, brine, antifreeze, or the like may be used. Further, heating by an electric heater may be used. That is, the heating unit 211 is an example using a heat pump.

  The compressor 231 compresses the heat medium that has absorbed heat from the air by the air heat exchanger 234 and supplies the compressed heat medium to the liquid heat medium heat exchanger 232. The compressor 231 is capable of capacity control, and is configured to be able to operate with a large capacity when supplying a large amount of hot water. Further, the compressor 231 has a low speed, for example, from 700 rpm to a high speed by PWM (Pulse Width Modulation) voltage control, PAM (Pulse Amplitude Modulation) voltage control, and a combination control thereof. For example, the rotation speed can be controlled up to 7000 rpm. Thus, the heating performance can be varied.

  The heat medium compressed by the compressor 231 is supplied to the liquid heat medium heat exchanger 232. The liquid heat medium heat exchanger 232 includes a heat medium side heat transfer tube 232a and a liquid side heat transfer tube 232b, and the heat medium compressed by the compressor 231 is supplied to the heat medium side heat transfer tube 232a. In addition, a liquid at normal temperature (normal temperature water) is supplied from the tank 223 via the pump 236 to the liquid side heat transfer tube 232b.

  In the liquid heat medium heat exchanger 232, a heat medium side heat transfer tube 232a and a liquid side heat transfer tube 232b are provided adjacent to each other, and a normal temperature flowing through the liquid side heat transfer tube 232b from the heat medium flowing through the heat medium side heat transfer tube 232a. The normal temperature liquid flowing through the liquid side heat transfer tube 232b is heated by transferring heat to the liquid, and the high temperature liquid is sent out. The high temperature liquid (high temperature water) heated by the liquid heat medium heat exchanger 232 is supplied to the upper part of the tank 221.

  The expansion valve 233 is composed of, for example, an electronic expansion valve, depressurizes the heat medium sent via the liquid heat medium heat exchanger 232, and sends it to the air heat exchanger 234.

  Moreover, the temperature of the air heat exchanger 234 is raised by opening the expansion valve 233 by the control unit 237 and supplying the heat medium to the air heat exchanger 234 at a relatively high temperature without reducing the pressure of the heat medium. A so-called defrosting operation for melting frost adhering to the air heat exchanger 234 can be performed. The efficiency of heat exchange between the air and the heat medium can be improved by the defrosting operation.

  The heat medium decompressed by the expansion valve 233 is supplied to the air heat exchanger 234. Outside air is supplied to the air heat exchanger 234 from the blower 235. The blower 235 includes a fan motor and a blower fan. The blower 235 rotates the blower fan by the rotation of the fan motor, and supplies outside air to the air heat exchanger 234 by the rotation of the blower fan.

  The air heat exchanger 234 performs so-called air heat exchange in which the heat of the outside air taken in by the blower 235 is transferred to a heat medium. A temperature sensor 238 is attached to the outside air intake side of the air heat exchanger 234. The temperature sensor 238 measures the outside air temperature drawn into the air heat exchanger 234. The outside air temperature measured by the temperature sensor 238 is supplied to the control unit 237.

  The control unit 237 controls the capacity of the compressor 231 of the heating unit 211 and the heat medium circulation amount of the expansion valve 233 in accordance with the outside air temperature measured by the temperature sensor 238 so as to efficiently heat the control unit 237. ing.

  The heat medium in which the heat of the outside air is transferred by the air heat exchanger 234 is supplied to the compressor 231. In the heating unit 211, the liquid heat medium heat exchanger 232 and the pump 236 are connected to the tanks 221 and 223 via the liquid pipe 240. The pump 236 is a so-called liquid circulation pump, which draws a high-temperature liquid from the lower part of the tank 223 through the liquid pipe 240 and supplies it to the liquid side heat transfer pipe 232 b of the liquid heat medium heat exchanger 232 through the liquid pipe 240. is doing.

  As described above, the liquid heat medium heat exchanger 232 moves heat from the heat medium flowing through the heat medium side heat transfer tube 232a to the liquid flowing through the liquid side heat transfer tube 222b. Heat is transferred from the heat medium by the liquid heat medium heat exchanger 232, and the heated high-temperature liquid is supplied to the upper portion of the tank 221 through the liquid pipe 240.

  Here, the difference between the control unit 237 of the liquid supply units 202 and 203 and the control unit 237 of the liquid supply unit 201 will be described.

  The control unit 237 of the liquid supply unit 202 collects the flow rate from the flow rate sensor 401b of the liquid supply unit 202, notifies the control unit 237 of the liquid supply unit 201, and various types of notification notified from the control unit 237 of the liquid supply unit 203. Data is notified to the control unit 237 of the liquid supply unit 201. Further, the flow rate adjustment valve 501 b is controlled by a command from the control unit 237 of the liquid supply unit 201.

  The control unit 237 of the liquid supply unit 203 collects flow rate data from the flow rate sensor 401 c of the liquid supply unit 203 and notifies the control unit 237 of the liquid supply unit 201 via the control unit 237 of the liquid supply unit 202. The flow rate adjustment valve 501c is controlled by a command from the control unit 237 of the liquid supply unit 201.

(Tank part)
Next, the tank unit 212 will be described. The tank unit 212 has a configuration in which the three tanks 221, 222, and 223 are connected in series as described above, and stores the high-temperature liquid supplied from the heating unit 211. The high-temperature liquid stored in the upper part of the tank 221 in the tank unit 212 is supplied to the liquid supply port 301 via the flow rate sensor 401a and the flow rate adjustment valve 501a.

  The tank unit 212 is a sealed type, and the same amount of room temperature liquid as the amount of high temperature liquid delivered to the liquid supply port 301 is transferred from the liquid injection port 601 to the tank unit 212 by the action of the pressure reducing valve 213. It is injected into the lower part of the tank 223.

  Thus, as described above, after the flow rate sensor 401 and the adjustment valve 501 are not provided between the liquid supply portions (201, 202, 203) and the liquid supply port 301, the flow injection port 601 is branched into a plurality of parts. Even if the flow rate sensor 401 and the flow rate adjustment valve 501 are provided between the pressure reducing valve 213 and the tank portion 212, the liquid delivered from the liquid supply portions (201, 202, 203) to the liquid supply port 301 in the same manner as described above. The flow rate of the liquid can be measured and the flow rate of the liquid can be controlled.

  As shown in FIG. 1, temperature sensors 241a, 241b, and 241c as high-temperature liquid amount detecting means are attached to each of the tanks 221, 222, and 223 at a plurality of locations on the outer surface and in the vertical direction, for example, three locations. Yes. The temperature sensors 241a, 241b, and 241c are composed of a thermistor and the like, and output signals from the temperature sensors 241a, 241b, and 241c are supplied to the control unit 237.

  In the configuration of the tank unit 212, for example, at the time of liquid supply operation (hot water supply operation), high-temperature liquid (hot water) is extracted from the upper part of the tank 221 to the liquid supply port 301 through the flow rate adjustment valve 501a. As a result, the pressure decrease generated in the upper part of the tank 221 is immediately transmitted to the pressure reducing valve 213 through the tanks 222 and 223. Then, the pressure reducing valve 213 is activated, and liquid at room temperature is injected from the liquid injection port 601 into the tank 223 via the pressure reducing valve 213, so that the amount of liquid in the tank portion 212 is filled and the internal pressure is also reduced. It is held and can be continuously supplied with hot water. That is, during the liquid supply operation, the liquid at the lower part of the tank 223 moves (rises) to the upper part so that the liquid at normal temperature supplied from the liquid injection port 601 is pushed out, and the liquid at the upper part of the tank 223 is It moves to the lower part of the next tank 222 so as to be pushed out, the liquid in the lower part of the tank 222 moves to the upper part (rises), and the liquid in the upper part of the tank 222 moves to the lower part of the next tank 221 so as to be pushed out. The liquid in the lower part of the tank 221 moves (rises) to the upper part thereof, and the liquid in the upper part of the tank part 221 is discharged from the liquid supply port 301 through the flow rate adjusting valve 501a so as to be pushed out. That is, the liquid is discharged from the tank 212 to the liquid supply port 301.

  On the other hand, in the liquid heating operation (hot water storage operation), when the normal temperature liquid (normal temperature water) is extracted from the lower part of the tank 223 to the heating unit 211 by the operation of the pump 236 described later, the tank unit 212 In each of the tanks 221, 222, and 223, a flow reverse to that in the liquid supply (hot water supply operation) occurs from the upper part to the lower part. That is, room temperature liquid (room temperature water) extracted from the lower part of the tank part 212 (lower part of the tank 223) circulates back to the upper part of the tank 212 (upper part of the tank 221) via the heating part 211. .

(Control part)
The control unit 237 detects the storage amount (stepwise water level) of the liquid stored in the tank 221 and the temperature based on output signals from the temperature sensors 241a, 241b, and 241c. Supplementally, as described above, since the inside of the tank 221 is always full, the control unit 237 indicates, for example, that the output signal of the temperature sensor 241a disposed at a higher position of the tank 221 indicates a temperature higher than a predetermined temperature. When the value is a value, it is determined that the liquid having a high temperature is stored up to the upper position of the tank 221, and the output signal of the temperature sensor 241b arranged at the middle position of the tank 221 indicates a temperature higher than a predetermined temperature. In this case, it is determined that the liquid having a high temperature is stored up to the middle position of the tank 221. When the output signal of the temperature sensor 241c arranged at the lower position of the tank 221 is a value indicating a temperature higher than the predetermined temperature, it is determined that the liquid having the higher temperature is stored up to the lower position of the tank 221. This determination by the control unit 237 is the same for the other tanks 222 and 223.

  The operation panel 701, the control unit 237 of the liquid supply unit 201, the control unit 237 of the liquid supply unit 202, and the control unit 237 of the liquid supply unit 203 are connected by, for example, a daisy chain method. Further, the control unit 237 of the heating unit 211 of the liquid supply unit 201 is connected to the operation panel 701 and the control unit 237 of the liquid supply unit 202 so as to communicate with each other. In addition, the control unit 237 of the heating unit 211 of the liquid supply unit 202 is connected to the control unit 237 of the liquid supply unit 201 and the control unit 237 of the liquid supply unit 203 so as to communicate with each other.

  The operation panel 701 is connected to the control unit 237 of the liquid supply unit 201 and includes a key switch and a display (not shown). When the user operates the key switch while looking at the display on the operation panel 701, various settings such as operation, operation stop, liquid amount (storage amount), temperature setting, operation time setting, etc. of the liquid supply units 201, 202, 203 are performed. It is also possible to perform a warning display to the user from each piece of information of the liquid supply unit 201.

  The control unit 237 of the liquid supply unit 201 performs overall operation control of the liquid supply units 201, 202, and 203 according to the input setting from the operation panel 701, and the control unit 237 of the liquid supply unit 202 and the liquid supply unit 203 are controlled. The controller 237 functions as a master device. On the other hand, the control unit 237 of the liquid supply unit 202 and the control unit 237 of the liquid supply unit 203 function as slave devices.

(Liquid supply adjustment control)
In the liquid supply apparatus according to the present embodiment, for example, at the time of installation of the liquid supply apparatus, liquid supply adjustment control is performed as part of the initial setting control prior to the normal operation control.

  Next, liquid supply adjustment control by the control unit 237 of the liquid supply unit 201 according to an embodiment of the present invention will be described.

  In the liquid supply adjustment control of this embodiment, the flow rate of the liquid supplied from each of the liquid supply units 201, 202, and 203 to the liquid supply port 301 is measured by each flow sensor 401, and the liquid supply units 201, 202, 203 are measured. In this control, each flow rate adjusting valve 501 is adjusted so that the flow rate of the liquid supplied from each of the liquid to the liquid supply port 301 becomes a predetermined value.

  In addition, the upper limit opening of the flow rate adjustment valve 501 at this time is set to an opening determined by performing a predetermined operation.

  The control unit 237 determines that each of the flow rates measured by the flow rate sensors 401 of the liquid supply units 201, 202, and 203 during the predetermined operation for determining the upper limit opening of the flow rate adjustment valve 501 is, for example, the maximum value. If there is a flow rate that is less than or equal to the predetermined ratio, the liquid supply unit that has the flow rate equal to or less than the predetermined ratio is stored in the storage device 250 and displayed on the display unit of the operation panel.

  Furthermore, the liquid supply adjustment control is performed in such a manner that the average storage amount of the high-temperature liquid storage amount in each tank unit 212 of each of the liquid supply units 201, 202, 203 and the tank unit 212 of each liquid supply unit 201, 202, 203 are high. The flow rate adjusting valve 501 is adjusted so that the ratio of the temperature liquid storage amount takes into account the flow rate of the liquid to be supplied to the liquid supply port 301 by each of the liquid supply units 201, 202, 203.

  Next, details of the liquid supply adjustment control will be described with reference to the drawings.

  3 and 4 show processing flowcharts of liquid supply adjustment control according to the embodiment of the present invention.

  The liquid supply adjustment control is roughly divided into a supply that detects an actual supply amount by supplying a liquid in a state where the assumed supply amounts of the respective liquid supply units 201, 202, and 203 are combined, and detects an abnormality in the supply amount. Volume abnormality detection control and upper limit supply amount setting control for setting an upper limit supply amount for each of the liquid supply units 201, 202, and 203 based on the detected actual supply amount of each of the liquid supply units 201, 202, and 203 It is divided into.

  Specifically, in the supply amount abnormality detection control, the flow rate adjustment valve 501 provided in each liquid supply unit is set to a fully open state for the flow rate of the liquid sent from each liquid supply unit 201, 202, 203 to the liquid supply port 301. Check the flow rate.

  In the upper limit supply amount setting control, the upper limit opening of each flow rate adjustment valve 501 is determined for each liquid supply unit 201, 202, 203 based on the result of the flow rate confirmation control. By the way, in the present embodiment, since the supply amount abnormality detection control and the upper limit supply amount setting control are performed in a series of flows, the opening amount of the flow rate adjustment valve 501 is fully opened during the supply amount abnormality detection control. The assumed supply amount in the supply amount setting control is combined. However, the supply amount abnormality detection control and the upper limit supply amount setting control can be made independent. In this case, if each flow rate adjustment valve 501 is in a state adjusted to a predetermined opening, it is fully opened. It is not limited to. Further, the state in which the assumed supply amounts are combined is not limited to the case where they are completely the same, and the variation is not inconvenient for detecting the actual supply amount for each of the liquid supply units 201, 202, and 203. (For example, within a few percent).

  First, in step S1-1, the control unit of the liquid supply unit 201, which is a master device, confirms the presence or absence of an operation start signal that determines an upper limit opening that is input by performing a predetermined operation on the operation panel 701, for example. . When there is no signal input, a standby state is set, and when there is a signal input, the process proceeds to the next step. In step S1-2, a display (display of driving instruction information) for notifying the user of an operation necessary for performing an operation for determining the upper limit opening degree on the operation panel is performed. For example, in this operation, since the flow rate information of the liquid sent from the liquid supply units 201, 202, 203 to the liquid supply port 301 is required, the user needs to open the liquid supply port 301. Accordingly, in step S1-2, for example, a message such as “Open the hot water supply port” is displayed to alert the user that the liquid supply port 301 needs to be opened. In addition, you may perform the alert display which prompts confirmation work of piping etc. simultaneously here.

  Next, in step S1-3, a list of each flow rate information measured by the flow rate sensor 401 provided in each liquid supply unit 201, 202, 203 is displayed. Here, by displaying the flow rate information in the current state, for example, the state in which each flow rate adjustment valve 501 is being operated by each control unit 237 of each liquid supply unit 201, 202, 203, each current liquid supply unit 201, 202 is displayed. , 203, the user can compare and confirm the flow rate of the liquid being delivered to the liquid supply port 301.

  In the next step S1-4, it is determined whether or not the user performs an operation for determining the upper limit opening degree of the flow rate adjustment valve 501 based on the flow rate information confirmed in step S1-3. When performing an operation for determining the supply amount, the supply amount abnormality detection control is performed by performing a predetermined operation for performing the main operation on the operation panel 701. Here, when it is determined that the user does not need to perform the operation for determining the upper limit opening degree, the operation can be terminated by performing a predetermined operation for terminating the operation without performing the operation ( Not shown).

  The supply amount abnormality detection control is shown in steps S1-5 to S1-12. In step S1-5, an operation of fully opening the flow rate adjustment valve 501 provided in each of the liquid supply units 201, 202, and 203 is performed. Specifically, an instruction signal for fully opening each flow rate adjustment valve 501 is output from the control unit 237 of the liquid supply unit 201 which is a master device to the control units of the liquid supply units 202 and 203 which are slave devices. When the instruction signal is input, each flow control valve is fully opened. As a result, the flow rate of the liquid sent from each of the liquid supply units 201, 202, 203 to the liquid supply port 301 becomes a flow rate value corresponding to each pressure loss generated depending on, for example, the installation state of the pipe.

  Next, in step S1-6, the operation panel 701 displays a list of flow rate values measured by the flow rate sensors 401 provided in the liquid supply units 201, 202, and 203 in the state of step S1-5, and the current value. The control state displays that the flow rate adjustment valve 501 is confirming the flow rate in the fully open state. Here, measurement and display are continuously performed for a predetermined time (for example, 1 minute) so that the measurement of each flow sensor 401 becomes stable. In step S1-7, the time until each flow rate adjustment valve finishes confirming the flow rate in the fully open state is measured, and when a predetermined time has elapsed, the process proceeds to step S1-8.

  Steps S1-8 and S1-9 determine whether the flow rate measurement result of each flow sensor 401 when the flow rate adjustment valves 501 are fully opened is within a predetermined range. Thus, it becomes a determination unit that alerts the user.

  Step S1-8 determines whether or not the actual supply amount measured by each flow sensor 401 provided in each liquid supply unit 201, 202, 203 is equal to or less than a predetermined value (for example, 5 L / min). I do. When there is at least one liquid supply unit having a flow rate value at which the actual supply amount measurement result is equal to or less than the predetermined value, the process proceeds to step S1-11. If there is no liquid supply unit at which the measurement result of the liquid flow rate is equal to or lower than the predetermined value, the process proceeds to S1-9 of the second determination process.

  Step S1-9 determines the calculation target lower limit supply amount based on the supply amount from each of the liquid supply units 201, 202, and 203, and there is a liquid supply unit whose actual supply amount is less than the calculation target lower limit supply amount. This is a step of determining whether or not to do so. Specifically, in step S1-9, the flow rate value obtained by multiplying the flow rate value of the liquid supply unit having the maximum value by a predetermined ratio (for example, 75%) is set as the calculation target lower limit supply amount, and each liquid supply unit It is determined whether or not there is a liquid supply unit in which the flow rate value of the liquid measured by each flow sensor 401 provided in 201, 202, and 203 is equal to or less than the calculation target lower limit supply amount. If there is even one liquid supply unit having a flow rate value equal to or less than the predetermined value, the process proceeds to step S1-10, and if there is not, the process proceeds to step S1-13.

  In step S1-10, information for identifying an individual such as the number or address information of the liquid supply unit whose flow rate measurement result is less than or equal to a predetermined value (less than) by the control unit of the liquid supply unit 201 serving as the master device. The data is stored in the storage device 250 provided in 237.

  Step S1-11 is a step of notifying when an abnormality in the supply amount is detected. Specifically, in order to notify the user that there is a difference of a predetermined value or more in the flow rate of the liquid delivered from each of the liquid supply units 201, 202, 203 to the liquid supply port 301, an operation is performed. This is processing for displaying on the panel 701. It shows the possibility that the effect of the control to equalize the decrease in the amount of high-temperature liquid stored in the tank part and the uniform control of the flow rate sent from each liquid supply part to the liquid supply port, which will be described later, becomes small. In the display of step S1-11, the difference in the flow rate between the above-described liquid supply units is large, and as a cause of the large difference in the flow rate, it is confirmed whether the piping has been routed or the equipment (flow rate adjustment valve 501, etc.) has failed. At the same time, alerts will be made to promote the above.

  Step S1-12 terminates the alert display when the user performs a predetermined confirmation operation so that the alert in step S1-11 is confirmed on the operation panel 701 with certainty. Here, in FIG. 3, when the confirmation operation in step S1-12 is Yes, the process proceeds to step S1-13 so that the control can be continued as a normal operation, but this control is forcibly terminated. It is also possible to select from two or three of waiting for operation or continuing or ending.

  In step S1-13, when the flow rate adjustment valves 501 provided in the respective liquid supply units 201, 202, and 203 are fully opened, the liquid to be delivered from the respective liquid supply units to the liquid supply port 301 is processed. Confirms the end of the control for confirming the flow rate, and confirms the start of the control for setting the upper limit opening of each next flow rate adjustment valve. When the user performs a confirmation operation on the operation panel 701, the upper limit supply amount Perform setting control.

  In the upper limit supply amount setting control, the reference supply amount is determined based on the detected actual supply amount of each of the liquid supply units 201, 202, 203, and the actual supply amount exceeds the reference supply amount. On the other hand, the flow rate adjusting means is adjusted so as to reduce the supply amount. In this way, it is possible to suppress variations in the supply amount for each of the liquid supply units 201, 202, and 203 while securing the overall supply amount as much as possible. That is, by reducing the supply amount of the liquid supply units 201, 202, 203 exceeding the reference supply amount, the pressure relationship between the liquid supply units 201, 202, 203 connected in parallel changes, and the supply amount It is possible to increase the supply amount from the liquid supply section where there is little. Specifically, if the opening of the flow rate adjustment valve of the liquid supply unit that exceeds the reference supply amount is reduced, the pressure loss in the liquid supply path increases, so that the liquid supply units 201, 202, and 203 supply each other. The deviation of the pressure loss in the liquid path is small, and more liquid can be supplied from the liquid supply unit where the supply amount is small.

  Specifically, the reference supply amount is set to a value between the largest value and the smallest value among the actual supply amounts of the liquid supply unit to be calculated. More specifically, the reference supply amount is an average supply amount of the detected actual supply amounts of the liquid supply units 201, 202, and 203. Then, the flow rate adjusting means is adjusted so that the supply amount becomes the average supply amount with respect to the liquid supply unit in which the actual supply amount exceeds the average supply amount.

  The upper limit supply amount setting control is specifically shown in FIG. In step S1-14, each control unit 237 provided in the liquid supply unit 201 serving as a master device measures each flow rate of the liquid sent to each liquid supply unit 201, 202, 203 to the liquid supply port 301. An average supply amount is calculated from the result of the sensor 401, and the average supply amount is set as a target flow rate at which the flow rate adjustment valve 501 provided in each liquid supply unit 201, 202, 203 performs opening degree adjustment control. The target flow rate is output by communication from the control unit 237 of the liquid supply unit 201 serving as a master device to the control unit 237 of the liquid supply units 202 and 203 serving as slave devices.

  In addition, in the upper limit supply amount setting control, when there is a liquid supply unit whose actual supply amount is less than the calculation target lower limit supply amount, the actual supply amount of the liquid supply unit is excluded and the reference supply amount (specifically Specifically, the average supply amount) is calculated. In addition, the liquid supply part in which the actual supply amount is less than the calculation target lower limit supply amount is previously stored in step S1-10. Thus, by excluding from the reference supply amount determination and the target value calculation, the target flow rate is prevented from becoming smaller.

  In step S1-15, the control unit 237 of each liquid supply unit 201, 202, 203 supplies the liquid supply port 301 from each liquid supply unit 201, 202, 203 measured by the flow rate sensor provided in each liquid supply unit. The flow rate adjustment valve 501 is controlled to open so that the flow rate of the liquid delivered to the gas reaches the target value determined in step S1-14.

  Step S1-16 is a process for determining the result of the flow rate control valve control in step S1-15. For example, the control unit 237 of the liquid supply unit 201 serving as the master device compares all the flow rate values of the measurement results of the flow rate sensor 401 of each liquid supply unit with the target flow rate calculated in step S1-14, and the flow rate of the measurement result. When the value falls within a predetermined range with respect to the target flow rate (for example, a range of 95 to 105%), it is determined that the process is normally completed, and the process proceeds to step S1-19. If any or all of the flow rate measurement results do not fall within the predetermined range, the determination is continued until a predetermined time set in advance (step S1-17), and the measured flow rate value remains even after the predetermined time elapses. If not within the predetermined range, the process proceeds to step S1-18.

  In step S1-18, an individual such as the number or address information of the liquid supply unit whose flow rate measurement result did not fall within the predetermined range in steps S1-16 and S1-17 in liquid supply unit 201 serving as a master device. Information to be identified is stored in the storage device 250 provided in the control unit 237. And the information of the liquid supply part memorize | stored here is reflected in the normal time flow regulating valve control mentioned later.

Step S1-19 is a process of storing the control information of the control unit 237 of each liquid supply unit 201, 202, 203 when determined in steps S1-16, S1-17. For example, the flow rate value of the liquid delivered from each liquid supply part 201, 202, 203 to the liquid supply port 301 at the time when step S1-17 is completed (during the liquid supply operation in which each flow rate adjustment valve 501 is fully opened) is 10L. / Min, 9 L / min, and 8 L / min, the target flow rate in step S1-15 is as follows:
(10 + 9 + 8) / 3 = 9L / min
The control units 237 of the liquid supply units 201, 202, and 203 perform opening degree control of the flow rate adjustment valves 501 so that the measurement results of the flow rate sensors 401 become 9 L / min.

  Here, the flow rate adjustment valve of the liquid supply unit, which has been 10 L / min before the control, is adjusted to an opening of, for example, about 90%, so that the flow rate of the liquid delivered from the liquid supply unit to the liquid supply port Can be 9 L / min. On the other hand, since the flow rate adjustment valve of the liquid supply unit, which was 8 L / min before the control, was 8 L / min in the fully opened state, it could not be adjusted to 9 L / min. The result is “8 L / min at the opening”. Furthermore, since the flow rate adjustment valve of the liquid supply unit, which had been 9 L / min before the control, was originally 9 L / min in the fully open state, it is almost as it is, that is, “100% flow rate adjustment valve open”. 9 L / min in degrees "results.

  Then, the flow rate adjustment valve opening result (for example, one is 90% and the remaining is 100%) is described later. The opening when standing by when not. As a result, the flow rate of the liquid delivered from each of the liquid supply units 201, 202, 203 to the liquid supply port can be made uniform to some extent. Accordingly, in step S1-19, the opening degree information is set as the upper limit opening degree at the time of the normal flow rate adjustment control of the flow rate adjustment valves provided in the respective liquid supply units 201, 202, 203 in step S1-19. Is stored in an external storage unit provided in the control unit 237.

  Next, in step S1-20, the measurement results of the respective flow rate sensors 401 resulting from the adjustment control of the respective flow rate adjustment valves 501 in steps S1-15 and S1-16 are displayed in a list on the operation panel 701, and the operation panel 701 by the user is displayed. The display state is maintained until a predetermined end confirmation operation is input, thereby informing the user of the result. If an end confirmation operation is input by the user, the process proceeds to step S1-21. Here, a message indicating that the upper limit opening degree determination control of the flow rate adjusting valve has been completed is displayed, and “close the hot water supply port” or the like. The liquid supply port 301 is displayed to call for closing.

  Here, in the above description, when starting the control method for determining the upper limit opening degree of each flow rate adjustment valve 501, for example, the operation is started based on a positive operation by the user so as to perform a dedicated mode or the like. However, there is no particular limitation. For example, the flow rate measured by each flow sensor 401 in a state where the opening degree of each flow rate adjustment valve is equal to or greater than a predetermined value suitable for adjusting the upper limit supply amount. The case where the value is equal to or greater than a predetermined value may be detected and the control may be automatically started. Further, in this case, if the notification of steps S1-2, S1-21, etc. (displaying on the operation panel 701 with a stimulating content that prompts the user to release or close the liquid supply port 301), the user may be confused. However, notification is not particularly necessary, but notification may be performed.

  By the way, in the liquid supply apparatus which concerns on one Example of this invention, the following liquid supply adjustment control is performed also at the time of normal operation control other than the liquid supply adjustment control at the time of the above-mentioned initial setting. For convenience of explanation, the liquid supply adjustment control during the normal operation control is referred to as flow rate adjustment valve control.

  Next, a flow rate adjustment valve control method for controlling the flow rate of the liquid delivered from each of the liquid supply units 201, 202, 203 to the liquid supply port 301 according to one embodiment of the present invention with each flow rate adjustment valve 501 will be described with reference to FIG. The flowchart will be described.

  First, as a flow of a basic control method, the liquid supply unit 201 as a master device grasps the supply amount of the liquid sent from each of the liquid supply units 201, 202, 203 to the liquid supply port 301, and supplies the liquid. The reference value (that is, the reference supply amount) is calculated, and the reference supply amount is output to the liquid supply units 202 and 203 serving as slave devices through communication.

  Specifically, the reference supply amount is set to a value between the largest value and the smallest value among the actual supply amounts of the liquid supply unit to be calculated. More specifically, the reference supply amount is an average supply amount of the detected actual supply amounts of the liquid supply units 201, 202, and 203.

  Further, the control unit 237 of the liquid supply units 201, 202, and 203 includes the reference supply amount, the storage amount of the high-temperature liquid stored in the tank unit 212 of each liquid supply unit, and the liquid supply units 201, 202, Based on the storage amount of the high-temperature liquid stored in the tank unit 212 of the entire 203, a necessary supply amount that is considered to be necessary to match the storage amount of each liquid supply unit 201, 202, 203 is calculated, The control unit 237 is configured to control the opening of the flow rate adjustment valve 501 so that the measured flow rate of the flow rate sensor 401 provided in each liquid supply unit becomes the necessary supply amount.

  This will be specifically described below. In step S2-1, the control unit of the liquid supply unit 201 serving as the master device calculates the average liquid flow rate (average supply amount) measured by the flow rate sensor 401 provided in all the liquid supply units. Here, when a liquid supply unit whose actual supply amount is less than the calculation target lower limit supply amount is stored in step S1-10 of the supply amount abnormality detection control, also in this step S2-1, The average supply amount is calculated by excluding the actual supply amount of the liquid supply unit.

  When the calculation result is less than a predetermined value (for example, 2 L / min), the control unit 237 of the liquid supply unit 201 serving as the master device determines that the liquid supply operation is not performed, and proceeds to step S2-2.

  In step S2-2, a command is output to the control unit 237 of each liquid supply unit 201, 202, 203 so that each flow rate adjustment valve 501 sets the upper limit opening described above with reference to FIG.

  In step S2-1, when the average flow rate calculation result is equal to or greater than a predetermined value, it is determined that the liquid supply operation is being performed, and the process proceeds to step S2-12.

  In step S2-12, a reference storage amount is calculated based on the amount of high-temperature liquid stored in the tank portion of each of the liquid supply units detected by the temperature sensors 241a, 241b, and 241c as the high-temperature liquid amount detection means, A process of comparing the reference storage amount with the storage amount of the high-temperature liquid stored in each tank unit 212 of each liquid supply unit 201, 202, 203 is performed. Specifically, the reference storage amount is set to a value between the largest value and the smallest value among the storage amounts of the tank units 212. More specifically, the reference storage amount is an average supply amount of the detected storage amount of each tank unit 212.

  And in step S2-12, when each individual storage amount is more than the said average storage amount, it progresses to step S2-2, and in step S2-2, the opening degree command of the flow regulating valve 501 of a corresponding liquid supply part. The value is set to the upper limit opening described above. On the other hand, when each individual storage amount is less than the average storage amount, the process proceeds to step S2-3.

In step S <b> 2-3, a necessary supply amount that is considered necessary to match the storage amounts of the liquid supply units 201, 202, and 203 is calculated. Specifically, the control unit 237 of each liquid supply unit 201, 202, 203 calculates a required flow rate that is a control target of the flow rate adjustment valve 501 provided in each liquid supply unit. Here, the required flow rate is calculated using the following equation.
Required flow rate = Average flow rate x (A / B)

  Here, A is the storage amount (for example,%) of the high-temperature liquid stored in each tank unit 212 of each liquid supply unit 201, 202, 203 provided with the flow rate adjusting valve 501 to be controlled, and B is these The average storage amount (for example,%) of the storage amount is represented.

  If the value obtained by subtracting the actual supply amount of the liquid supply unit whose stored amount is less than the reference storage amount from the required supply amount is larger than a predetermined margin value, the supply of liquid from the liquid supply unit The flow rate adjusting means is controlled so that the amount increases.

  Specifically, in step S2-4, the control unit 237 of each liquid supply unit 201, 202, 203 controls the flow rate adjusting valve 501, and the required flow rate and each liquid supply unit 201, 202, 203. This is a process of comparing the flow rate values of the liquids sent from the respective liquid supply units to the liquid supply ports 301 measured by the respective flow rate sensors 401 provided in 203. For example, when the required flow rate is larger than a predetermined margin value (including 0) as compared with the flow rate value measured by the flow rate sensor 401, the process proceeds to step S2-5.

  In step S2-5, a predetermined operation amount is added to the current opening degree command value of the flow rate adjusting valve 501. Then, the process proceeds to step S2-6. In step S2-6, it is determined whether the flow rate adjustment valve opening command value after the addition exceeds the upper limit opening determined above. In step 7, the upper limit opening value is set to the flow rate adjustment valve opening command value, and the control is terminated.

  On the other hand, in step S2-4, the required flow rate and the flow rate of the liquid delivered to the liquid supply port 301 from each liquid supply unit measured by each flow sensor 401 provided in each liquid supply unit 201, 202, 203 are determined. When the comparison result indicates that the required flow rate is less than or equal to the predetermined margin value, the process proceeds to step S2-8.

  When the value obtained by subtracting the necessary supply amount from the actual supply amount of the liquid supply unit in which the storage amount is less than the reference storage amount is larger than a predetermined margin value, the supply of liquid from the liquid supply unit The flow rate adjusting means is controlled so as to reduce the amount.

  Specifically, in step S2-8, it is determined whether or not the required flow rate is larger than a predetermined margin value (including 0) compared to the flow rate value measured by the flow rate sensor 401. When the result of this determination is YES, the process proceeds to step S2-9, and in step S2-9, a predetermined operation amount is subtracted from the current opening command value of the flow rate adjusting valve 501.

  Then, the process proceeds to step S2-10. In step S2-10, it is determined whether or not the subtracted flow rate adjustment valve opening command value is less than a predetermined lower limit opening. In step S2-11, the predetermined lower limit value is set in the flow rate adjustment valve command, and the control is terminated. In addition, by setting the lower limit opening before reaching full closure, it is possible to prevent inconveniences such as air mixing by supplying liquid with a small opening. However, the predetermined lower limit opening is not particularly provided, and control may be performed until the valve is fully closed.

  Here, in steps S2-4 to S2-11, as a method of operating the opening degree command value of the flow rate adjusting valve 501, the magnitude relationship in which the current measured flow rate value is equal to or greater than a predetermined value with respect to the required flow rate is simply used. The method of adding or subtracting the predetermined opening value to the current flow rate adjustment valve opening command when there is a magnitude relationship greater than or equal to the predetermined value is described, but general P control, PI control, PID Control and fuzzy control may be used.

  In addition to the above liquid supply adjustment control, the control unit 237 controls the operation / stop of the heat medium circuit, the rotation speed of the compressor 231, the opening degree of the expansion valve 233, and the storage in the tank unit 212. Controls such as storage operation and defrosting operation are performed.

  For example, the control unit 237 controls the rotation speed of the compressor 231 during the storage operation, gradually increases the rotation speed from the start of operation to high speed rotation, shortens the heating start-up time, and after the heating is stabilized, Control to perform low-speed operation. At this time, the control unit 237 controls the rotational speed of the compressor 231 so as to operate at a rotational speed commensurate with the heat load and the heating temperature.

  Further, when the use of the high-temperature liquid of the day ends, the control unit 237 measures the remaining amount of the high-temperature liquid in the tanks 221, 222, and 223 using the temperature sensors 241a, 241b, and 241c, and the next day's liquid. The heating unit 211 is operated so that the amount of hot liquid accumulated in the tank unit 112 is larger than the estimated usage amount. At this time, the control unit 237 sets the operation start time so that the heating operation ends within the application time of the night discount electricity rate, for example, from 23:00 to 7 o'clock, and when it reaches the set time, starts the storage operation, Control to end.

  As described above, according to the present embodiment, since the flow rate can be directly detected, the adjustment of the supply amount of the liquid supplied from each of the liquid supply units 201, 202, 203 to the liquid supply port can be performed with high accuracy. It can be carried out. Moreover, since it is not necessary to use a high-temperature liquid when adjusting the supply amount of the liquid, for example, an operation for adjusting the deviation of the hot water supply amount during installation can be performed in a short time.

  That is, the upper limit of the opening degree for operating the flow rate adjustment valve 501 of the liquid supply units 201, 202, 203 can be determined in advance as an upper limit value according to the installation environment of each liquid supply unit 201, 202, 203, Further, since this upper limit value is the standby opening degree of each supply amount adjusting valve, the flow rate of the liquid sent from each of the liquid supply units 201, 202, 203 to the liquid supply port 301 can be made uniform. Thereby, it is possible to prevent the compressor 231 of the heating unit 211 of the specific liquid supply unit among the liquid supply units 201, 202, and 203 from being operated excessively, and the compressor of the heating unit 211 of the specific liquid supply unit It is possible to prevent the life of 231 from being shortened.

  In addition, since it has a supply amount abnormality detection control for detecting an abnormality in the supply amount of liquid from each of the liquid supply units, which is performed prior to normal operation control, it is possible to detect abnormalities such as construction defects and equipment failures. A liquid supply device that can be provided can be provided.

  Furthermore, in the case where there is a difference for each liquid supply unit in the storage amount of the high-temperature liquid stored in the tank unit 212 provided in each liquid supply unit 201, 202, 203, the storage amount of the average storage amount Since the flow rate adjusting valve 501 of the small liquid supply unit is controlled so as to reduce the flow rate in accordance with the ratio of the storage amount to the average storage amount, it is possible to operate so as to reduce the difference in the storage amount.

  Further, a reference storage amount is calculated based on the amount of high-temperature liquid stored in the tank portion of each liquid supply unit, and for a liquid supply unit whose storage amount does not satisfy the reference storage amount, In order to calculate the required supply amount of the liquid supply unit based on the ratio between the storage amount and the reference storage amount and the reference supply amount, and to control the flow rate adjusting means based on the required supply amount, The supply amount of the liquid supplied from the unit to the liquid supply port can be adjusted with high accuracy.

  By these, the operation rate of the liquid supply units 201, 202, and 203 can be made uniform, and the operation rate of the heating unit 211 of the liquid supply units 201, 202, and 203 can be made uniform. It is possible to prevent the heating unit 211 of the specific liquid supply unit from being operated excessively. Thereby, shortening of the lifetime of the compressor 231 of the heating unit 211 can be prevented. In addition, since the use of the high-temperature liquid stored in the tank unit 212 is made uniform, it is possible to prevent a temperature drop due to the fact that the high-temperature liquid is not used, and to improve the thermal efficiency. In addition, it is possible to prevent a phenomenon in which one tank is out of hot water but the other tank is out of hot water.

  In addition, it cannot be overemphasized that this invention is applicable to various embodiment in the range which is not limited to the said embodiment and does not deviate from description of a claim.

  For example, in the above embodiment, as shown in FIG. 1, the tank unit 212 is composed of three tanks 221, 222, and 223, but the tank unit 212 may be composed of one tank. Moreover, it may be constituted by two or four or more tanks.

  Furthermore, in the said embodiment, as shown in FIG. 1, although it is set as the structure which connected the three tanks 221,222,223 which comprise the tank part 212 in series, the structure connected in parallel may be sufficient.

  In the above embodiment, as shown in FIG. 1, the heating unit 211 and the tank unit 212 are provided in each of the three liquid supply units 201, 202, and 203, but a single heating unit 211 is provided with three supply units. The liquid parts 201, 202, 203 may be shared.

  In the above embodiment, the flow rate adjusting means is described as being configured by the flow rate adjusting valve 501 provided in each liquid supply unit, but is not limited thereto, and is supplied from each liquid supply unit. You may be comprised by the mixing valve arrange | positioned at the confluence | merging part of a liquid.

  In addition to this, the flow rate adjusting means may be constituted by an on-off valve provided in each liquid supply unit. In this case, a method of opening / closing the on / off valve so that the integrated liquid supply amount of each liquid supply unit becomes the upper limit supply amount can be considered.

DESCRIPTION OF SYMBOLS 100 Liquid supply apparatus 201,202,203 Liquid supply part 211 Heating part 212 Tank part 237 Control part 250 Memory | storage device 301 Liquid supply port 401 (401a, 401b, 401c) Flow rate sensor 501 (501a, 501b, 501c) Flow rate adjustment valve 601 Injection port 701 Operation panel

Claims (5)

A liquid supply device that supplies liquid from a plurality of liquid supply units connected in parallel to a common liquid supply location,
A supply amount detection means for detecting a supply amount of the liquid supplied from the liquid supply units to the liquid supply port;
Flow rate adjusting means for adjusting the amount of liquid supplied from each of the liquid supply units,
Normal operation control for supplying liquid from each liquid supply unit to the liquid supply location, and upper limit supply amount setting control for setting an upper limit supply amount of liquid for each liquid supply unit, which is performed prior to the normal operation control Have
In the upper limit supply amount setting control, the liquid supply is performed in a state in which the assumed supply amount for each of the liquid supply units is matched, and the actual supply amount is detected for each of the liquid supply units, and each detected liquid supply is detected. An upper limit supply amount in the normal operation control is set for each liquid supply unit based on an actual supply amount for each unit. A reference supply amount is determined based on the detected actual supply amount of each liquid supply unit,
2. The liquid supply apparatus according to claim 1, wherein the flow rate adjusting unit is adjusted so that the supply amount decreases with respect to a liquid supply unit in which an actual supply amount exceeds the reference supply amount. An average supply amount is calculated based on the detected actual supply amount of each liquid supply unit,
3. The supply according to claim 2, wherein the flow rate adjusting unit is adjusted so that the supply amount becomes the average supply amount with respect to a liquid supply unit in which an actual supply amount exceeds the average supply amount. Liquid device. Determine the calculation target lower limit supply amount based on the supply amount from each liquid supply unit,
The reference supply amount is calculated by excluding the actual supply amount of the liquid supply unit when there is a liquid supply unit in which the actual supply amount is less than the calculation target lower limit supply amount. 2. The liquid supply apparatus according to 2. The flow rate adjusting means is constituted by a flow rate adjusting valve provided in each liquid supply unit,
The flow rate adjusting valve supplies liquid with the maximum opening, and detects an actual supply amount for each liquid supply unit, and the flow rate based on the detected actual supply amount for each liquid supply unit. The liquid supply apparatus according to claim 1, wherein an upper limit opening of the adjustment valve is set for each liquid supply unit.

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