JP3774615B2 - Test run control method for hot water heater - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a test operation control method for a hot water heater used for trial operation control during a trial operation of the hot water heater, and in particular, a thermal valve for switching on and off the circulation supply of hot water to a terminal radiator is normally opened. This relates to checking whether or not the conversion operation is performed.
[0002]
[Prior art]
Conventionally, as a hot water heating device, a heat source device provided with a heating circuit provided with a heat exchanger heated by a combustion burner and a circulation pump for circulating water in a hot water storage tank, and each room outside the heat source device What consists of several terminal radiators (for example, a floor heater and a bathroom heater) installed in is generally known. In this, the plurality of terminal radiators are connected in parallel to the heating circuit via a thermal valve and a circulation pipe, and the hot water heated by the heat exchanger by opening a desired thermal valve is opened. Are individually circulated to the corresponding terminal radiator.
[0003]
And about said hot water heating apparatus, after installing a heat source machine and each terminal radiator, and performing piping construction, such as circulation piping, between the heat source machine and each terminal radiator, it is used (normal heating Before being used for operation, a test run is generally performed to determine whether or not it functions normally by filling it with water. That is, whether or not each of the thermal valves normally opens and closes, whether or not the circulation piping is normally connected, whether or not the terminal radiator is supplied with warm water at a predetermined temperature and heating by the terminal radiator is normal Whether or not to be performed is checked as a test run.
[0004]
In particular, the above-mentioned thermal valve is structured so that heater heating is performed in response to an opening operation command from the controller, and the opening conversion operation is performed in response to this heating. It is important to check whether or not to perform the test operation.
[0005]
The above check on the thermal valve is usually performed by monitoring the variation in the temperature difference between the outgoing hot water circulated between the circulation pump and the terminal radiator and the return hot water. Yes. That is, hot water heated to a predetermined temperature by the heat exchanger is circulated in the heating circuit by the operation of the circulation pump, and in this state, an opening operation command is output to the thermal valve to be checked. If the thermal valve normally opens and converts, it is heated and the high-temperature forward hot water is supplied from the heating circuit to the terminal radiator through the circulation pipe, and is radiated by the terminal radiator to a low temperature. Return-side hot water is returned to the circulation pump. Therefore, the temperature difference between the temperature detection values of the forward-side hot water and the return-side hot water before the output of the opening operation command to the thermal valve increases and fluctuates due to heat radiation from the terminal radiator. Therefore, by detecting that the temperature difference is stabilized in an increased state, it is detected that the thermal valve has been normally opened and converted to an open state.
[0006]
[Problems to be solved by the invention]
However, the conventional open-conversion operation check for the above-described thermal valve requires a very long time, and there is a problem that the total time required for the trial operation is lengthened.
[0007]
That is, in the conventional open conversion operation check, since the heat radiation gradually proceeds after the hot water is supplied to the terminal radiator, the temperature difference is gradually increased even if the thermal valve is normally opened. In addition to increasing, this increase will proceed for a relatively long time. Moreover, even if the thermal valve has actually been fully opened, the above heat dissipation does not become stable and continues for some time thereafter, so both hot water temperatures on the forward side and the return side are detected. Even if the temperature difference is monitored, the temperature difference will increase for a while after the thermal valve reaches the fully open state. For this reason, a time longer than the actual thermal valve operation elapses until the temperature difference becomes stable, and a predetermined determination time elapses to determine that the temperature has reached the stable state. It is necessary to expect. As a result, in order to obtain the result of the open conversion operation check, there is an inconvenience that a long standby time (for example, 12 minutes) longer than the time required for the actual open conversion operation of the thermal valve is required.
[0008]
In addition, conventionally, after performing an open conversion operation check for one thermal valve, a close operation command is subsequently output to perform a close conversion operation check, and then the other thermal valve is opened and closed as described above. Both the open / closed conversion operation checks are sequentially performed for each thermal valve such that both conversion operation checks are performed. The waiting time required for the closing conversion operation check is slightly shorter (for example, 10 minutes) than the opening conversion operation check, but double waiting time is required for both opening and closing.
[0009]
In particular, in a hot water heater, normally, there are many cases where multiple or many (for example, 4 to 10) terminal radiators are connected to a heat source unit, and it is necessary to check the same number of thermal valves as the terminal radiator. Therefore, the time required for the entire test run is extremely long.
[0010]
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a test operation time for checking the open conversion operation of a thermal valve that requires a particularly long time even during a test operation of a hot water heater. An object of the present invention is to provide a test operation control method for a hot water heating apparatus that can be shortened as much as possible.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a heat source device having a heating circuit in which at least a heating unit and a circulation pump are disposed, and the heating device provided outside the heat source device by an individual thermal valve and a circulation pipe. At least one terminal radiator connected to the circuit, and hot water heated from the heating circuit by the conversion of the thermal valve to an open state is circulated and supplied to the terminal radiator through the circulation pipe. Concerning the hot water heating apparatus configured in the above, the following specific matters are intended for the trial operation control method of the hot water heating apparatus that checks whether or not the above-mentioned thermal valve operates normally before performing normal operation. It is. That is, the hot water heating device is installed using a variable flow rate pump driven by a DC motor as the circulation pump and the discharge flow rate is variable by changing the rotation speed, and then the heat source device and the circulation pipe are installed. In the water-filled state, the DC motor is controlled to operate at a constant rotational speed by a controller that performs trial operation control, and an opening operation command is output to the thermal valve. Thereafter, the voltage value or current value applied during the operation control of the DC motor, or at least one of the circulating flow rate value or the piping pressure value in the heating circuit is set as the monitoring target value, and the monitoring target value is set. monitoring the variation, in which a main specific matters to make it detects that the opening conversion operation of the heat valve train to be successful by predetermined variation occurs in the monitored value.
[0012]
Here, as the “heating unit”, a combination of a combustion burner and a heat exchanger heated by the combustion heat of the combustion burner, or an electric heater or the like is used.
[0013]
If it has the above-mentioned main specific matters, it becomes possible to shorten the time required for the open conversion operation check whether or not the thermal valve normally performs the open conversion operation based on the open operation command. It is possible to significantly reduce the total time required for the trial operation of the apparatus. In other words, when the thermal valve receives an opening operation command, if it is normal, heating by the heater is started and initially the opening operation is only slightly performed from the fully closed state due to a heating delay, but the opening degree suddenly increases when heating is sufficient. Then it will be almost fully open. Due to the rapid increase in the opening degree, the circulating flow rate value of the water circulated from the heating circuit of the heat source machine to the circulation pipe also increases rapidly. As a result, the piping pressure value also fluctuates suddenly due to new resistance based on the piping length of the circulating piping and the presence of the terminal radiator, or the DC motor of the circulating pump that is affected by these fluctuations is kept at a constant rotation speed. In the operation control for maintaining, the applied voltage value fluctuates, or the current value fluctuates as the applied voltage value changes. Therefore, any one of current value, voltage value, pipe pressure value and circulating flow value is monitored as a monitoring target, and the monitoring target value indicates that a predetermined fluctuation corresponding to the sudden increase in the opening degree has occurred. By detecting, it becomes possible to detect reliably and early that the thermal valve has been normally opened and converted.
[0014]
As described above, in the conventional technology, after the thermal valve is fully opened, it is necessary to wait until the temperature difference between the warm water on the return side and the return side of the warm water becomes stable before the normal operation is performed. Compared to the fact that it was not possible to determine that the open conversion operation has been performed, it is possible to determine that the open conversion operation has been performed normally without waiting for the fully open state. Figured. In particular, in the case of a hot water heating apparatus in which a plurality or a large number of thermal valves are installed, it is possible to greatly reduce the time. In addition, when it is detected that the open conversion operation of the thermal valve is normally performed, for example, a notification that the notification is normal or a voice notification is given by a notification means such as a remote controller connected to the controller. To the operator.
[0015]
In addition, since the open conversion operation check can be performed without depending on the temperature fluctuation, the heating operation in the heating unit, which was necessary in the prior art in the case of the above-described invention, is unnecessary, and the water filled in the pipe line is not necessary. It is possible to perform the open conversion operation check of the thermal valve in the state. Thereby, simplification of trial run control is achieved.
[0016]
In response to the above-mentioned main specific items , the timer value starts until the monitoring target value reaches a stable state after the timer is started at the same time as the output of the opening operation command to the thermal valve and a predetermined fluctuation occurs in the monitoring target value. detects, so as to store sets the detection timer value as an open conversion reference open time value required for the operation to fully open the opening operation start of the heat valve train to controller. In this case, in the normal heating operation after the trial operation, by detecting the time required for the open conversion operation, it is possible to detect an abnormality such as a failure by comparing the detection time value with the reference open time value. It becomes possible.
[0017]
In addition to the above-mentioned main specific matters , the terminal radiator, the circulation pipe for circulating the hot water individually to each terminal radiator, and the heat for switching the opening and closing of the supply of hot water through the circulation pipe to the terminal radiator When targeting a hot water heater with two or more terminal systems consisting of a combination with a valve, by adding the following specific items, the time required for the trial operation time required to check the open conversion of the heat valve Further and drastic reduction will be achieved. That is, first, a thermal valve of any one terminal system is to be checked, an opening operation command is output to this check target thermal valve, and when the monitored value fluctuates, the check target thermal valve is opened. Perform an open conversion operation check to detect that the operation is normal, and then change the check target thermal valve to any new thermal valve until the open conversion operation check has been completed for all the thermal valves. When the check target thermal valve is changed, the check target thermal valve is opened simultaneously with the detection of the normally open conversion operation for the current check valve. The opening operation command may be output to the next check target thermal valve while the state is maintained.
[0018]
In this case, it is possible to start the opening operation for the next check target thermal valve at the stage before the current check target thermal valve is fully opened. Compared with the prior art that waits for the passage of time, the time can be greatly shortened. Thus, even if the opening operation command is output to the next check target thermal valve, it is not opened immediately due to the heating delay of the thermal valve at the initial stage after the output as described above. On the other hand, when the opening of the next check target thermal valve suddenly increases, the previous check target thermal valve is already fully open, and there is no further change to the circulation flow rate value, etc. Therefore, even if the previous check target thermal valve is opened, the open conversion operation check for the current check target valve can be reliably performed.
[0019]
Further, in the case where the plurality of terminal systems are targeted, after completion of the open conversion operation check for the total thermal valve, a closing operation command may be simultaneously output to the total thermal valve. .
[0020]
In the monitoring of the monitoring target value in the above invention, when the circulation flow rate value or the pipe pressure value is set as the monitoring target, for example, the flow rate detection means or the pressure detection means may be disposed in the heating circuit and detected. Not limited to this, as long as the heat source device has a hot water supply circuit, a bath pouring circuit or a bath reheating circuit, etc., a flow rate detecting means or a pressure detecting means already installed in a circuit other than the heating circuit. May be temporarily used effectively only during trial operation.
[0021]
【The invention's effect】
As described above, according to the trial operation control method for a hot water heating apparatus according to any one of claims 1 to 4, it is possible to reliably and early detect that the thermal valve has been normally opened and converted. This makes it possible to shorten as much as possible the trial operation time required for checking the open conversion operation of the thermal valve that requires a particularly long time even during the trial operation of the hot water heater. In particular, in the case of a hot water heating apparatus in which a plurality or a plurality of thermal valves are installed, an extremely large time reduction can be obtained.
[0022]
In particular , according to the first aspect , the time from the output of the thermal valve opening operation command to the fully open state during the trial operation is stored in advance as a reference opening time value, so that the heat during the normal heating operation can be stored. It becomes possible to easily detect the abnormality of the valve operating.
[0023]
Further, according to claim 2 , when a plurality of thermal valves are targeted, it is necessary to wait for the closing operation of the current check valve to be checked before outputting the opening operation command to the next check target valve. As a result, the trial run time can be greatly shortened.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0025]
FIG. 1 shows an example of a composite heat source machine to which an embodiment of the present invention is applied. The composite heat source machine 20 has functions of hot water supply, heating, and bathing. In the figure, 21 is a hot water supply circuit, 22 is a heating circuit, 23 is a reheating circuit, and 24 is a controller for controlling the operation and trial operation of each of these circuits. This combined heat source machine 20 is a type that heats up the hot water of the reheating circuit 23 by exchanging heat between the hot water of the heating circuit 22 and the hot water of the reheating circuit 23 when reheating the bath. belongs to. Hereinafter, each main component 21, 22, 23, 24 of the composite heat source machine 20 will be described.
[0026]
(Hot water supply circuit 21)
The hot water supply circuit 21 includes a hot water supply casing (can) 32 that forms a hot water supply combustion chamber 31, a hot water supply heat exchanger 33 that is disposed above the combustion chamber 31 in the casing 32, and this heat exchange. A hot water supply burner 34 disposed below the heater 33, a hot water supply fuel supply system 35 for supplying fuel gas to the burner 34, a blower fan 36 for supplying combustion air to the burner 34, and the hot water supply The hot water supply water intake pipe 37 and the hot water supply hot water discharge pipe 38 connected to the heat exchanger 33 are provided.
[0027]
The hot water supply fuel supply system 35 includes a hot water supply gas pipe 40 connecting the downstream side of the solenoid valve 39 for opening and closing common to a heating fuel supply system 55 described later and the hot water supply burner 34, and the hot water supply gas pipe. 40, and a hot water proportional solenoid valve 41 for changing and adjusting the amount of fuel gas supplied to the burner 34.
[0028]
Then, water such as tap water supplied to the hot water supply heat exchanger 33 through the water intake pipe 37 is heated by the flame of the hot water supply burner 34 while passing through the hot water supply heat exchanger 33, and the hot water discharge pipe 38. The hot water is supplied to a predetermined hot water supply location such as a curan 44 such as a kitchen or the reheating circuit 23. The hot water supply pipe 37 is provided with a water amount sensor 45 for detecting the flow rate of incoming water to the hot water supply heat exchanger 33 and a water input thermistor 46, and the hot water supply hot water pipe 38 is provided with a hot water thermistor 47. is set up.
[0029]
(Heating circuit 22)
The heating circuit 22 includes a heating casing (can) 52 that forms a heating combustion chamber 51, a heating heat exchanger 53 and a heating burner 54 that constitute a heating unit, and the burner 54 that has the same fuel as described above. A heating fuel supply system 55 that supplies gas, a heating blower fan 56 that supplies combustion air to the burner 54, and a heating circulation passage 57 that passes through the heating heat exchanger 53 are provided. .
[0030]
The heating fuel supply system 55 includes a heating gas pipe 60 connecting the downstream side of the common opening / closing solenoid valve 39 and the heating burner 54, and the heating gas pipe 60 interposed between the heating gas pipe 60 and the burner. And a heating electromagnetic proportional valve 61 that changes and adjusts the amount of fuel gas supplied to 54.
[0031]
The heating circulation channel 57 includes an expansion tank 64 serving as a hot water storage tank interposed in the middle, a heating water inlet pipe 65 extending from the expansion tank 64 to the heating heat exchanger 53, and heat exchange for the heating. A heating hot water discharge pipe 66 extending from the vessel 53 to the expansion tank 64 is provided. The expansion tank 64 is connected to the downstream end of a heating water injection pipe 68 branched from the hot water supply pipe 37 and provided with a water injection valve and a replenishing water solenoid valve. Water supply when the water level in 64 is lowered is performed based on detection signals from the high water level switch 641 (see FIG. 2) and the low water level switch 642 (see FIG. 2). The heating inlet pipe 65 is provided with a heating circulation pump 67 for circulating the hot water in the expansion tank 64 through the heating circulation passage 57 and the like. Are disposed so as to pass through a reheating heat exchanger 81 described later.
[0032]
The heating circulation pump 67 is constituted by a DC pump using a DC (direct current) motor as a driving motor, and the rotation speed of the pump blade (invera) is controlled by changing the applied voltage command value by PWM (Pulse Width Modulation) control. Change control can be performed. The discharge flow rate capacity is changed by the change control of the rotation speed. In addition, a rotation speed detection means for detecting the rotation speed and a current value detection means for detecting a current value flowing under a voltage applied by the applied voltage command are provided, and the detected values are output to the controller 24, respectively. It is supposed to be.
[0033]
An upstream end of the low-temperature heating pipe 69 is branched and connected to the intermediate position of the heating inlet pipe 65, and a plurality of (six in the illustrated example) thermal motions are provided as terminal on-off valves at the downstream end of the low-temperature heating pipe 69. A 6P header 72 having valves 721 to 726 (see FIG. 2) is connected. And as shown in FIG. 2, the upstream end of the circulation piping 11-14 which goes to several low temperature terminal radiators A1-A4 with respect to each thermal valve 721-726 of the said 6P header 72 is connected separately, and the said low temperature The low-temperature water from the heating pipe 69 is branched in parallel to the terminal radiators A1 to A4. Each of the low-temperature terminal radiators A1 to A4 is composed of a floor heating radiator panel or a radiator tube installed in each room of the building, and is relatively low in temperature (for example, 60 ° C.) during normal heating operation. Of hot water is circulated. In the example of FIG. 2, the four terminal radiators A1 to A4 are individually connected to the four thermal valves 721 to 724, and the other two thermal valves 725 and 726 are not connected. Shows the case.
[0034]
The upstream end of the high-temperature heating pipe 70 is branchedly connected to the heating outlet pipe 66 at an intermediate position between the heating heat exchanger 53 and the reheating heat exchanger 81, and the downstream side of the high-temperature heating pipe 70. Is provided with a downstream connection end 701. The downstream connection end 701 is connected to the upstream end of the circulation pipe 15 toward one or more (two examples are shown in FIG. 2) high-temperature terminal radiators A5 and A6. . The circulation pipe 15 is branched into two branch circulation pipes 15a and 15b in the middle of the circulation pipe 15 and passes through the high-temperature terminal radiators A5 and A6 via thermal valves 151 and 152 each constituted by a thermal valve. It is like that. The high-temperature terminal radiators A5 and A6 are constituted by, for example, a bathroom dryer, an indoor heater, or the like, and hot water having a relatively high temperature (for example, 80 ° C.) is circulated and supplied during normal heating operation. ing.
[0035]
The upstream end of the heating bypass pipe 75 is branched from the high temperature heating pipe 70 in front of the downstream connection end 701, and the downstream end of the heating bypass pipe 75 is connected to the heating return pipe 71 in front of the expansion tank 64. Connected to join. The downstream ends of the circulation pipes 11 to 14, 15a, and 15b that have passed through the low-temperature and high-temperature terminal radiators A1 to A6 are connected to the upstream connection end 711 of the heating return pipe 71. The downstream end of the heating return pipe 71 is joined and connected to the heating tap pipe 66 at a position before the expansion tank 64.
[0036]
Terminal controllers 241 to 246 are individually arranged in the terminal radiators A1 to A6, and the terminal controllers 241 to 246 communicate with the controller 24 on the heat source unit 20 side by wireless or wired. It is possible. As a result, during the trial operation, the terminal controllers 241 to 246 output the statuses of the terminal radiators A1 to A6 to the heat source unit-side controller 24, and open / close operation commands for the thermal valves 721 to 724, 151, and 152. Can be output from each of the terminal controllers 241 to 246 or from the heat source unit controller 24.
[0037]
The terminals installed in parallel outside the heat source device 20 constitute one terminal system 1 with the thermal valve 721, the circulation pipe 11, and the terminal radiator A1, and the thermal valve 722, the circulation pipe 12 and the terminal. Similarly, the heat exchanger A2 constitutes one terminal system 2, so that each of the thermal valves 723, 724, 151, 152, the circulation pipes 13, 14, 15 and 15a, 15 and 15b, and each terminal radiator A3 Each terminal system 3-6 is comprised by each combination with -A6.
[0038]
Returning to FIG. 1, the outlet temperature of the outgoing hot water from the heat exchanger 53 is detected in the heating outlet 66 from the heating heat exchanger 53 to the branch to the upstream end of the high-temperature heating pipe 70. The return side thermistor 73 for detecting the temperature of the return side hot water is installed in the heating return pipe 71.
[0039]
Further, a bath thermal valve 76 is interposed downstream of the reheating heat exchanger 81 of the heating hot water discharge pipe 66, and the heating hot water valve 76 is closed to close the heating hot water discharge pipe 66. Hot water flows only through the high-temperature heating pipe 70 and flows through the circulation pipe 15 when one or both of the thermal valves 151 and 152 are open, and flows through the heating bypass pipe 75 when both are closed. become.
[0040]
(Turning circuit 23)
The reheating circuit 23 includes the reheating heat exchanger 81, a recirculation circulation passage 82 that passes through the heat exchanger 81, a recirculation circulation pump 83 that circulates hot water through the circulation passage 82, A hot water supply pipe 84 that branches off from the hot water supply hot water supply pipe 38 and pours hot water into the circulation channel 82 is provided.
[0041]
The recirculation circulation channel 82 includes a bath return pipe 85 extending from a bathtub (not shown) to the reheating heat exchanger 81 and a bath return pipe 86 extending from the reheating heat exchanger 81 to the bathtub. Has been. The bath return pipe 85 is provided with the circulation pump 83 and connected to the downstream end of the pouring pipe 84. The pouring pipe 84 is provided with a hot water amount sensor 87 for detecting the flow rate of the pouring pipe 84 and an electromagnetic on-off valve 88. In addition, the bath return pipe 85 is provided with a pressure sensor 89 for detecting the water level in the bathtub.
[0042]
(Controller 24)
The controller 24 controls the operation of each of the heat exchange circuits 21, 22, 23 in response to various operation commands based on the input operation of the user or the test run operator from the remote controller 240 constituting the notification means. And a memory and the like. The controller 24 includes a portion for controlling normal operation such as a hot water supply control means, a bath reheating control means and a heating control means corresponding to the circuits 21, 22, and 23, a storage means, and the circuits 21 and 22 respectively. , 23 and the trial run control means for controlling the trial run of each of the terminal radiators A1 to A6 connected to the heating circuit 22.
[0043]
(Test run control)
On the premise of the above configuration, the pressure sensor 7 (see FIG. 2) as pressure detection means for detecting the pressure in the pipeline with respect to the discharge side pipeline of the circulation pump 67 of the heating circuit 22 is used only for trial operation control. The trial run control in the case of being arranged for this purpose will be described below. In the following description, test operation control for the hot water heating system including the heating circuit 22 and the terminal systems 1 to 6 will be described.
[0044]
This trial operation control is performed after the installation of the heat source device 20, the installation of the terminal radiators A1 to A6 in each room, and the various works and the wiring work of the piping and connection of the circulation pipes 11 to 15 are completed. In this state, all the thermal valves 721-726, 151, 152, the bath thermal valve 76, etc. are all closed. In addition, a predetermined pump characteristic table for the circulation pump 67 is stored in advance in the storage means of the controller 24.
[0045]
This trial run control is started, for example, by turning on an automatic trial run switch disposed on the remote controller 240. As shown in FIG. 3, after performing the water filling process SUB1, the pump characteristic value correction process SUB2 for the circulation pump 67 is performed. I do. Next, the terminal radiator Aj to be checked, that is, the terminal system is selected (step S1). In this selection, an arbitrary terminal system is selected one by one from the six terminal systems 1 to 6 to check whether or not the open conversion operation of the thermal valve of the newly selected terminal system is normally performed. After performing the open check process SUB3, the pressure loss check process SUB4, and the normal operation check process SUB5 of the newly selected terminal system, the terminal system is increased and selected one by one until all of the six terminal systems 1 to 6 are selected. Each process SUB3-5 is repeated (refer to the case of “NO” in step S2). And if each process SUB3-5 about all the terminal systems 1-6 is complete | finished (in step S2, j = jmax = 6; in the case of "YES"), all the heat operated valves 721- which have been opened by then 724, 151, 152 are closed simultaneously and simultaneously (step S3), and the close check processing SUB6 of all the thermal valves 721-724, 151, 152 and the pressure loss variation check processing SUB7 of each terminal system 1-6 are performed. To complete the trial run control. Hereafter, each said process is demonstrated in detail. In addition, the ON operation of the automatic test run switch receives the output signals from the installed terminal controllers 241 to 246, the number of currently connected terminal radiators, which thermal valve is connected, and Whether or not normal communication is possible is confirmed.
[0046]
In the water filling process SUB1, water is injected into the expansion tank 64 through the heating water injection pipe 68, and then all of the low temperature thermal valves 721 to 724 and the high temperature thermal valves 151, 152 are opened. Next, the circulation pump 67 is operated to fill the heat source device 20 side and the terminal radiators A1 to A6 side outside the heat source device 20 with water filling, and after the water filling is completed, all the thermal valves 721 to 724, 151, above. 152 is closed to close again.
[0047]
In the pump characteristic value correction processing SUB2, the operation of the circulation pump 67 is continued while all the above-described thermal valves 721 to 724, 151, 152 are closed, whereby the flow of water is changed in the heating circuit 22 of the heat source unit 20. Only in circulation. That is, the water from the expansion tank 64 is sucked and discharged by the circulation pump 67, and the discharged water passes through the water inlet pipe 65, the heat exchanger 53, the high temperature heating pipe 70, the bypass pipe 75 and the return pipe 71. The internal circulation state is set such that the tank 64 is returned to the tank 64. Since the bypass pipe 75 is incorporated in advance on the heat source unit 20 side, the piping specifications and the flow rate (bypass flow rate) with respect to a predetermined pump output are also known by performing tests and the like in advance.
[0048]
In the above-mentioned internal circulation state, a predetermined applied voltage command value is output to the circulating pump 67 and is operated with a pump work (pump capacity) corresponding to a pump characteristic table (see the one-dot chain line in FIG. 4) that is set in advance. Let Next, in this operating state, the rotational speed detection value of the circulation pump 67 by the rotational speed detection means and the current detection value by the current value detection means are detected, and the pump work defined by these rotational speed detection value and current detection value is detected. The pump characteristic table is corrected to match the quantity. This correction is performed by offsetting the difference or multiplying by a ratio that can eliminate the difference. This correction processing SUB2 may be performed a plurality of times corresponding to the plurality of pump works if the stored pump characteristic table is a plurality of pump work tables corresponding to the plurality of pump works. Thereafter, the corrected pump characteristic table (see the solid line in FIG. 4) is used. By the correction process SUB2 described above, variations caused by manufacturing errors of the circulation pump 67 and the like are corrected in advance.
[0049]
In the newly selected terminal thermal valve opening check process SUB3, as shown in FIG. 5, while performing the constant rotation speed continuous control (step S11) for maintaining the rotation speed of the circulation pump 67 at a constant rotation speed, the newly selected terminal is newly selected. An opening operation command is output to a thermal valve (for example, 721), which is a check target thermal valve, to start the opening operation, and at the same time, a timer is started (step S12).
[0050]
If the opened thermal valve 721 is normal, as shown in FIG. 6, the opening operation is started only slightly from the fully closed state due to a heating delay, but the opening degree suddenly increases when heating is sufficient. Close to full opening. Due to the rapid increase in the opening degree, the flow rate of the water circulated and supplied from the low temperature heating pipe 69 to the circulation pipe 11 also increases rapidly. As a result, the resistance based on the length of the circulation pipe 11 and the presence of the terminal radiator A1 is newly received, and the pressure detection value in the pressure sensor 7 is suddenly changed, or the circulation pump 67 which is affected by these fluctuations. Is maintained at a constant rotational speed, the applied voltage value is changed, or the current value varies with the change of the applied voltage value.
[0051]
Therefore, any one of the current value, voltage value, pressure value, and flow rate value (for example, the pressure detection value by the pressure sensor 7) is detected and monitored, and the detected value increases the opening degree rapidly. It is determined whether or not the corresponding predetermined fluctuation has occurred until the determination time by the timer has elapsed (steps S13 and S14). “Open check OK” is displayed on the display unit (steps S13 and S15). Next, if the monitored value after the fluctuation stabilizes without further fluctuation, the timer value at the stable time is stored and set in the storage means as the reference open time value (steps S16 and S17). If the fluctuation does not occur even after a predetermined determination time has elapsed, it is determined that there is an abnormality in the opening operation of the thermal valve 721, and a "thermal valve opening error" is displayed on the liquid crystal display unit (step S1). S14, S18), in order to make sure the thermal valve 721, a closing operation signal is output, and after that, jump to step S2 (steps S19, S20). Although not shown, when “open check OK” is displayed in step S15, the next process (pressure loss check process SUB4, etc.) is started before steps S16 and S17. While the selection of a new terminal in step S1 is sequentially advanced, the detection of the reference opening time value and the storage setting in steps S16 and S17 are performed in parallel.
[0052]
With the above-described open check process SUB3, in the prior art, it is not necessary to wait for the temperature difference between the return side and the return side of the heated hot water to be in a fully open state and the temperature difference between the heated warm water and the return side becomes stable. Therefore, the time required for the open check can be shortened in that the normal open operation can be determined without waiting for the full open state. In particular, when a plurality or a large number of thermal valves are installed, a significant time reduction can be obtained. As a result, as shown in FIG. 6, the opening operation of the next thermal valve can be started before the current thermal valve is fully opened, and the current thermal valve is fully opened. The next process (for example, the pressure loss check process SUB4) can be started from the position immediately before becoming. As a result, the overall time required for the trial run can be greatly shortened.
[0053]
In the pressure loss check process SUB4, as shown in FIG. 7, first, the rotational speed of the circulation pump 67 (indicated as “heating pump” in FIG. 7) is increased from the initial rotational speed (for example, 2000 rpm) to a predetermined rotational speed (for example, 100 rpm). ) Step by step (step S21). For each speed increase step of the rotational speed, the relationship between the pressure value P and the flow rate value Q (PQ relationship) at that time is sequentially acquired and stored in the storage means of the controller 24 (step S22). At this time, the pressure value P is directly detected from the pressure sensor 7, while the flow rate value Q may be obtained by calculating from the control rotation speed and the current detection value at that time. Next, the pressure loss curve for the terminal system (for example, terminal system 1; terminal radiator A1) to be circulated and supplied this time is stored and the calculated pressure loss curve is stored in the storage means (step S23). That is, based on the set of values of P and Q acquired in step S22, a relational expression for both values is obtained by a high-order approximation, and this is obtained as a pressure loss curve (pressure loss characteristic) for the terminal system 1 (A1). Data) in the storage means. Specifically, when the combinations of both values of P and Q acquired in step S22 are plotted in order on the orthogonal coordinates of the pressure P and the external flow rate Q as shown in FIG. 8 (see the black circles in the figure), The pressure loss curve is obtained by an approximate curve that connects in order.
[0054]
When the terminal system 1 (A1) is selected in step S1, SUB3 to 5 are performed for the terminal system 1, and when the process returns to step S1 again through step S2, the next opening operation is performed to The terminal system that circulates and supplies is selected. Here, assuming that the terminal system 6 (A6) is selected as the next time, the pressure loss check processing of the SUB 4 is performed in the same manner as described above in a state in which the thermal valves 721 and 152 are both opened through the SUB 3. . In this case, as shown in FIG. 9, in addition to the previous pressure loss curve of the terminal system 1 (A1) alone, a combined pressure loss curve of the two terminal systems 1, 6 (A1, A6) is obtained. The pressure loss curve for the combination of the two terminal systems 1, 6 (A1, A6) is stored and held. In this way, pressure loss curves in the case of combining a plurality of terminal systems such as three terminal systems and four terminal systems are sequentially obtained and stored.
[0055]
At that time, a pressure loss curve in the case of a single terminal system newly selected by comparison between the pressure loss curve obtained this time and the pressure loss curve obtained last time is sequentially acquired and stored (step S24). For example, if the combined pressure loss curve of the above two terminal systems 1, 6 (A1, A6) is obtained, the difference between the combined pressure loss curve and the pressure loss curve of the terminal system 1 (A1) alone obtained previously is plotted. By doing so, a pressure loss curve (curve indicated by a dotted line in FIG. 9) in the case of the terminal system 6 (A6) newly selected this time alone is obtained. Thereby, the pressure loss curve in case water is circulated and supplied independently about all the terminal systems 1-6 (A1-A6) will be obtained. In addition, a pressure loss curve in the case of a combination of any two or more terminal systems for which a pressure loss curve has not been acquired by the same method is also obtained, and each of the above pressure loss curves is stored in the storage means It becomes.
[0056]
FIG. 10 shows an example in which six pressure loss curves are obtained for each of the six terminal systems 1 to 6 (A1 to A6) at the time of single use by the process of step S24. In the figure, four curves shown by solid lines are pressure loss curves when the terminal systems 1 to 4 (A1 to A4) are used individually, and two curves shown by dotted lines are terminal systems 5 and 6 (A5 and A6). It is a pressure-loss curve at the time of each individual use.
[0057]
The normal operation check processing SUB5 of the newly selected terminal system determines whether or not the terminal radiator of the terminal system is normally heated by circulating and supplying hot water heated to a predetermined temperature by burning the heating burner 54 to the predetermined temperature. A known method is conventionally used. That is, the terminal controllers 241 to 246 detect whether the terminal radiators A1 to A6 rise to a predetermined temperature and output them to the controller 24, or each of the forward side thermistor 73 and the return side thermistor 74. It may be determined based on the difference between the temperature detection values.
[0058]
And in the thermal valve closing check processing SUB6 after the simultaneous closing operation start (step S3) of all the thermal valves 721 to 724, 151 and 152 of all the terminal systems 1 to 6, as shown in FIG. The timer started from the start of the closing operation waits for the elapse of a preset closing operation time (required time to reach the fully closed state if normal) (step S31), and the number of revolutions at that time is similar to the above. It is determined whether or not the actual circulating flow rate value obtained by calculation based on the detected value and the detected current value is greater than the known bypass flow rate value (step S32). If the actual circulating flow value is the bypass flow value, all the circulating water is circulated through the bypass pipe 75 and all the thermal valves 721 to 724, 151 and 152 are fully closed. It is determined that “closed check OK” is displayed on the liquid crystal display unit of the remote controller 240 (step S33).
[0059]
Conversely, if the actual circulating flow value is larger than the bypass flow value, it is determined that an abnormality has occurred in which one of the thermal valves is not fully closed, and is identified (step) S34). That is, the pressure loss curve that matches the combination of the flow value at that time and the pressure value detected by the pressure sensor 7 is calculated from the various pressure loss curves stored and held in the pressure loss check process SUB4. If the calculated pressure loss curve is a pressure loss curve when used alone, it is specified that the thermal valve of the terminal system is not fully closed but is still open, and the calculated pressure loss curve has two or more terminal systems. If it is a pressure loss curve at the time of combination use, it will be specified that each thermal valve of two or more terminal systems concerning the combination is not fully closed but is still open.
[0060]
And it displays on the liquid crystal display part of the remote control 240 that the thermal valve identified above and these are abnormalities of closing (closing error), and notifies the operator (step S35).
[0061]
Finally, in the pressure loss variation check process SUB7 of each terminal system 1-6, as shown in FIG. 12, the maximum pressure loss curve Wmax among the various pressure loss curves stored and held in the storage means in the pressure loss check process SUB4, The minimum pressure loss curve Wmin is extracted (step S41), and it is determined whether the ratio of Wmax to Wmin (degree of variation; Wmax / Wmin) is larger than a limit value α (for example, α = 1.6) (step S41). S42). If the degree of variation is smaller than the limit value α, “pressure loss variation check OK” is displayed on the liquid crystal display unit of the remote controller 240 as being within the allowable limit (step S43), and if the degree of variation is larger than the limit value α. The fact that pressure loss variation has occurred on the liquid crystal display unit, the specific terminal system corresponding to Wmax and Wmin, and the numerical value of the degree of variation occurring are displayed (step S44). In this case, it is possible to easily and surely notify the operator of the occurrence of pressure loss variation and the terminal system in which the pressure loss variation has been known only with the intuition of skilled workers. Countermeasure work can be carried out quickly and easily. As a result, it is possible to reliably avoid the occurrence of a situation where heating cannot be performed in one terminal system when the two terminal systems having the largest and the smallest pressure loss are simultaneously used in normal operation due to the occurrence of large pressure loss variations. become. In addition, as a countermeasure, the adjustment by the ball valve arrange | positioned at each piping, etc. are mentioned, for example.
[0062]
When the above trial operation control is completed, the heating operation control during normal use is performed by the heating control means. In this case, control is started by turning on the heating operation switch of one or more terminal radiators that the user wants to use from among the terminal radiators A1 to A6 using the terminal controllers 241 to 246 or the remote controller 240. The By this control start, the opening operation of the thermal valve of the terminal system that has been turned ON, the operation of the circulation pump 67, and the combustion operation of the burner 54 are started. In that case, the pressure loss curve memorize | stored in the memory | storage means is used as a reference | standard of the operation | movement control of the said circulation pump 67. FIG. That is, an applied voltage command to the circulation pump 67 is output from the heating control means so as to obtain a circulation flow rate corresponding to the pressure loss based on the pressure loss curve of the terminal system that has been turned ON, and based on the applied voltage command. The rotational speed control is performed. As a result, hot water having a flow rate that matches the pressure loss characteristics of the terminal system that is heating-operated is circulated and energy saving is achieved with respect to the driving energy of the circulation pump 67 together with reliable heating operation.
[0063]
To give a more specific example, for example, in FIG. 10, a flow rate value with a pressure loss of 5.00 × 9.8 kPa is calculated from six pressure loss curves, and the flow rate value is circulated at the time of circulation supply to the corresponding terminal system. The operation control standard of the pump 67 may be used.
[0064]
<Other embodiments>
In addition, this invention is not limited to the said embodiment, Other various embodiment is included. That is, in the above-described embodiment, the pressure sensor 7 as pressure detecting means is disposed on the discharge side pipe of the circulation pump 67 to directly detect the pressure in the pipe and indirectly obtain the circulation flow rate value. However, conversely, a flow rate sensor as a flow rate detecting means may be provided for trial operation to directly detect the circulating flow rate value and indirectly obtain the pressure value. In this case, as shown in FIG. 13, the flow rate sensor 8 may be provided in the return pipe 71, or the flow rate sensor 8 may be provided in the discharge side (outward side) pipeline of the circulation pump 67.
[0065]
Further, by omitting the provision of the pressure sensor 7 or the flow rate sensor 8 only for the trial operation, the existing sensors in the hot water supply circuit 21 (see FIG. 1) and the reheating circuit 23 are effectively used only for the trial operation. It may be. For example, a bypass pipe that bypasses from the middle of the return pipe 71 so as to pass through the water amount sensor 45 of the hot water supply water pipe 37 is detachably connected between the return pipe 71 and the hot water supply water pipe 37, The sensor 45 is effectively used as the flow rate detecting means for acquiring the pressure loss characteristic data and detecting the monitoring target value. The bypass pipe should be used only during trial operation and removed after the trial operation. By using a bypass pipe similar to the above, the hot water amount sensor 87 of the pouring pipe 84 may be effectively used as the flow rate detecting means for acquiring the pressure loss characteristic data and detecting the monitoring target value. In addition, a communication pipe that communicates with the high-temperature or low-temperature heating pipe 70 or 69 is connected to the pressure sensor 89 for detecting the water level in the bathtub of the reheating circuit 23, for example, by switching operation of a three-way switching valve. It is used as pressure detecting means for detecting the pipe pressure by communicating with the heating pipes 70 and 69 during the test operation, and used as a water level detecting sensor for detecting the water level in the bathtub by communicating with the bath return pipe 85 during normal operation. May be.
[0066]
Alternatively, neither the pressure detection means nor the flow rate detection means for trial operation is provided in the heating circuit 22, and correction is made by a pump characteristic table or a pump characteristic correction process SUB2 (see FIG. 3) preset in the controller 24. The pressure loss curve may be obtained using the pump characteristic table.
[Brief description of the drawings]
FIG. 1 is an overall schematic diagram showing a composite heat source apparatus to which an embodiment of the present invention is applied.
FIG. 2 is a schematic diagram showing a heat source unit in a heating circuit portion and a terminal radiator outside the heat source unit.
FIG. 3 is an overall flowchart of test operation control.
FIG. 4 is a pressure-flow rate relationship diagram for explaining correction of a pump characteristic table.
FIG. 5 is a flowchart showing a subroutine of thermal valve open check processing;
FIG. 6 is a time-passing flow rate relationship diagram showing an open characteristic of a thermal valve.
FIG. 7 is a flowchart showing a subroutine of pressure loss check processing.
FIG. 8 is a pressure-flow rate relationship diagram for explaining a method of acquiring a pressure loss curve when one terminal system is used alone.
FIG. 9 is a pressure-flow rate relationship diagram for explaining each pressure loss curve of a single terminal system and two terminal systems, and a method for obtaining a pressure loss curve when using an unknown terminal system alone from these.
FIG. 10 is a pressure (pressure loss) -flow rate relationship diagram illustrating an example of a pressure loss curve when each of the six terminal systems is used alone.
FIG. 11 is a flowchart showing a subroutine for thermal valve closing check processing;
FIG. 12 is a flowchart showing a subroutine of pressure loss variation check processing;
FIG. 13 is a view corresponding to FIG. 2 showing a heating circuit to which another embodiment is applied.
[Explanation of symbols]
A1 to A6 Terminal radiators 1 to 6 Terminal system 7 Pressure sensor 8 Flow rate sensors 11 to 15, 15a, 15b Circulating piping 20 Heat source unit 22 Heating circuit 24 Controller 53 Heat exchanger for heating (heating unit)
54 Heating burner (heating unit)
67 Circulation pump for heating (variable flow rate type pump)
151,152 Thermal valve 240 Remote control (notification means)
721-724 Thermally operated valve

Claims (4)

A heat source device having a heating circuit in which at least a heating unit and a circulation pump are disposed, and at least one terminal radiator installed outside the heat source device and connected to the heating circuit by individual thermal valves and circulation piping; A hot water heating apparatus configured to circulate and supply hot water heated from the heating circuit by the conversion to an open state of the thermal valve through the circulation pipe to the terminal radiator. In the test operation control method of the hot water heating apparatus for checking whether or not the above-mentioned thermal valve normally performs a conversion operation before performing,
The hot water heating device is installed using a flow rate variable type pump that is driven by a DC motor as the circulation pump and the discharge flow rate is variable by changing the rotation speed thereof.
Next, in a state where the heat source unit and the circulation pipe are filled with water, the controller that performs trial operation control controls the operation of the DC motor so that the number of rotations of the DC motor remains constant, while opening the thermal valve. Command output,
Thereafter, the voltage value or current value applied during the operation control of the DC motor, or at least one of the circulating flow rate value or the piping pressure value in the heating circuit is set as the monitoring target value, and the monitoring target value is set. Monitor changes,
While detecting that a predetermined fluctuation occurs in the monitored value, the open conversion operation of the thermal valve is normally performed,
The timer is started simultaneously with the output of the opening operation command to the thermal valve,
After a predetermined fluctuation occurs in the monitored value, a timer value until the monitored value reaches a stable state is detected, and the detected timer value is detected from the start of the thermal valve to the fully opened state for the controller. to store set as the reference open time value required for the opening transformation operation
Commissioning method of controlling temperature water heating system, characterized in that. A heat source device having a heating circuit in which at least a heating unit and a circulation pump are disposed, and at least one terminal radiator installed outside the heat source device and connected to the heating circuit by individual thermal valves and circulation piping; A hot water heating apparatus configured to circulate and supply hot water heated from the heating circuit by the conversion to an open state of the thermal valve through the circulation pipe to the terminal radiator. In the test operation control method of the hot water heating apparatus for checking whether or not the above-mentioned thermal valve normally performs a conversion operation before performing,
A terminal system comprising a combination of a terminal radiator, a circulation pipe that circulates hot water individually in each terminal radiator, and a thermal valve that opens and closes the supply of hot water through the circulation pipe to the terminal radiator. attached to the hot-water heating apparatus having two or more,
The hot water heating device is installed using a flow rate variable type pump that is driven by a DC motor as the circulation pump and the discharge flow rate is variable by changing the rotation speed thereof.
Next, in a state where the heat source unit and the circulation pipe are filled with water, the controller that performs trial operation control controls the operation of the DC motor so that the number of rotations of the DC motor remains constant, while opening the thermal valve. Command output,
Thereafter, the voltage value or current value applied during the operation control of the DC motor, or at least one of the circulating flow rate value or the piping pressure value in the heating circuit is set as the monitoring target value, and the monitoring target value is set. Monitor changes,
In order to detect that the open conversion operation of the thermal valve is normally performed when a predetermined fluctuation occurs in the monitoring target value,
Also not a, and the Netsudoben of any one of the terminal system to be checked, and outputting an open operation command to the checked thermal valve train, opening conversion operation of the checked thermal valve operating fluctuations occur in the monitored value Perform an open conversion operation check to detect that the
Thereafter, until the open conversion operation check for all the thermal valves is completed, the check target thermal valve is changed to any new thermal valve, and the open conversion operation check is sequentially repeated.
When the above check target thermal valve is changed, the next check target thermal valve is kept open while the above check target thermal valve is kept open at the same time as detecting the normally open conversion operation for the current check valve. you to output an open operation command to
Commissioning method of controlling temperature water heating system, characterized in that. A test operation control method for a hot water heater according to claim 2 ,
A test operation control method for a hot water heating apparatus in which, after completing an open conversion operation check for a total heat operated valve, a close operation command is simultaneously output to the total heat operated valve. A test operation control method for a hot water heater according to claim 2,
Connect the notification means to the controller,
A test operation control method for a hot water heating apparatus, wherein when the open conversion operation is normally detected, the check result is notified by the notification means.

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