JP5316838B2 - Hot water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water heating device and a hot water heating system capable of preventing falling of water of a radiation terminal unit disposed at a position higher than the hot water heating device. <P>SOLUTION: In this hot water heating device 2 disposed in the hot water heating system 1, connected with the external radiation terminal unit 3 and having a circulation pump 6, an operation of the circulation pump 6 is stopped on condition that a temperature of the hot water detected by a temperature detector 7 of the hot water heating device 2 reaches a prescribed temperature or less, or on condition that a specific time has passed from the time when the temperature reaches the prescribed temperature or less, when an operation of the radiation terminal unit 3 is stopped. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a hot water heating apparatus that circulates hot water through a hot water pipe, and more particularly to a hot water heating apparatus that is suitable when a heat radiation terminal is installed at a higher position than the hot water heating apparatus.

  As the hot water heating system, a system provided with a hot water heating device for heating hot water circulating using a heat radiating terminal and gas as fuel is used. In such a heating system, there is a problem that air enters the pipe due to various causes, and the air stays in the pipe as time passes.

  Here, the heat radiating terminal may be installed at a higher position than the hot water heater. In this case, the hot water in the heat radiating terminal may “fall down” due to the action of the air staying in the pipe. Furthermore, there is a concern that this “falling water” causes the hot water to flow into the open tank provided in the hot water heating apparatus and overflow.

Therefore, in order to prevent such a problem of “falling water”, Patent Document 1 discloses that air staying in the pipe by periodically driving the circulation pump and forcibly circulating the hot water in the pipe. A method for preventing “falling water” by pulling out the water is disclosed. Patent Document 2 discloses a method for preventing “falling water” to an open tank by providing shut-off valves on both the forward and return pipes in the hot water heating system.
Japanese Utility Model Publication No. 5-83617 JP 2006-145119 A

  However, with such a method, an inefficient situation occurs in which operation is performed even when air does not stay in the pipe (Patent Document 1). Moreover, when the heat radiating terminal is installed at a position higher than the hot water heater, in the conventional heating system, when the operation is stopped, the circulation pump stops first, and then the closing valve is closed. For this reason, the hot water in the pipe on the heat radiating terminal side is pulled by the gravity of the hot water in the pipe, and the pressure of the pipe on the heat radiating terminal side decreases. At this time, the pressure in the pipe is equal to or lower than the atmospheric pressure, and a phenomenon of low-temperature boiling occurs in which hot water less than 100 ° C. is boiled.

Therefore , in view of the above problems, the hot water heating apparatus of the present invention, when stopping the hot water heating apparatus, is based on the condition that the hot water circulating in the system has reached a predetermined temperature or below, or below the predetermined temperature. The purpose of the present invention is to provide a hot water heating apparatus that stops the operation of the circulation pump on the condition that a certain period of time has passed after reaching the target.

In order to solve the above problems, the invention of claim 1 is a hot water heating apparatus provided in a hot water heating system and connected to an external heat radiating terminal, wherein the hot water heating apparatus includes a circulation pump, hot water A combustion unit that is a heating means that heats, a temperature detector that detects a temperature of hot water , and a blower that supplies air to the combustion unit, and the hot water heating device and the heat dissipation terminal are connected by hot water piping The hot water pipe is composed of a forward pipe through which hot water flows to the heat radiating terminal side and a return pipe through which the hot water flows to the hot water heater side, and the hot water heating apparatus, or the forward pipe and the return pipe The pipe is provided with an opening / closing valve, and each of the opening / closing valves is driven at a predetermined time difference and in a predetermined order when the operation of the hot water heater is started and stopped. First of all, After the predetermined time has elapsed, the return side open / close valve is opened, and when the operation is stopped, the return side open / close valve is first closed, and after the predetermined time has elapsed. The on-off side opening / closing valve is closed, and when the hot water heater is stopped, the temperature detected by the temperature detector reaches a predetermined temperature or lower, or falls below the predetermined temperature temperature. The operation of the circulating pump is stopped on the condition that a certain time has passed since the time until the temperature detected by the temperature detector reaches a predetermined air blow stop temperature or below the predetermined air blow stop temperature. The hot water heating apparatus is characterized in that the air blower is operated at a higher output than the output during normal heating operation until a certain time elapses .

The hot water heating apparatus according to claim 1 is configured such that when the operation of the hot water heating apparatus is stopped, the operation of the circulation pump is continued and the hot water in the heating system is circulated. Therefore, hot hot water does not stay in the piping. Furthermore, since the operation of the circulation pump is continued until the temperature of the hot water detected by the temperature detector reaches a predetermined temperature or below, or until a predetermined time has elapsed after the temperature has fallen below the predetermined temperature, the piping is contracted by heat shrinkage of the piping. It is possible to prevent “falling water” caused by an increase in the internal pressure. Moreover, since the circulating pump is stopped after the temperature of the hot water remaining in the pipe is sufficiently lowered, the hot water does not boil even if the inside of the pipe is at atmospheric pressure or lower. For this reason, it is possible to prevent “falling water” caused by low temperature boiling, which was a problem in the prior art.
In the configuration of the present invention, the meaning of the term “warm water heating device” is a general term for devices that heat liquid and supply it to heating equipment, and usually a heat medium mainly composed of water is used. It does not exclude devices that use other liquids.

The blowing stop temperature may be the same as the predetermined temperature or may be different. The hot water heating apparatus according to claim 1 controls the operation of the circulation pump and the blower when the operation of the hot water heating apparatus is stopped. Therefore, the effect of cooling the temperature of the hot water is increased, and the “falling water” phenomenon due to the heat shrinkage of the piping and the low temperature boiling of the hot water can be prevented.

Moreover, the hot water heating apparatus according to claim 1 shortens the cooling time of the hot water by controlling the output of the blower device to be higher than the normal output when stopping the operation of the hot water heating apparatus. Can do. By doing so, efficient control can be performed in a short time, and wasteful power consumption can be suppressed.

Moreover, the hot water heating apparatus of Claim 1 can control each on-off valve by a predetermined time difference and a predetermined order. That is, when the heating system is started and stopped, the hot water is efficiently circulated and air can be prevented from remaining in the pipe. Further, even when the heat radiating terminal is installed at a position higher than the hot water heater, the inside of the pipe becomes below atmospheric pressure, and it is possible to prevent the “falling water” phenomenon due to the low temperature boiling of hot water.

According to a second aspect of the present invention, in the invention of the first aspect , when the operation of the hot water heating apparatus is started, the circulation pump starts before the opening / closing valve that starts the valve opening operation first, or the When the on-off valve is opened, the operation is started, and when the operation of the hot water heater is stopped, when the on-off valve to be closed last is closed or after the on-off valve is closed. The hot water heater is characterized in that the operation of the circulating pump is stopped after a predetermined time has elapsed.

Hot-water heating apparatus according to claim 2, since the opening and closing valve is first opened when the start operation upon previously or opening opened, operation of the circulation pump is started, the heat radiation terminal unit is hot water heating Even in the case where the apparatus is installed at a higher position than the apparatus, the inside of the piping does not become atmospheric pressure or less, and the operation is started smoothly. In order to stop the circulation pump when the on-off valve that closes last when the operation is stopped or after a predetermined time has elapsed since the valve was closed, the heat dissipating terminal is installed higher than the hot water heater. Even if it is, the inside of piping does not become below atmospheric pressure, and a driving | operation is stopped smoothly. Therefore, it is possible to prevent “falling water” due to low temperature boiling of hot water.

A third aspect of the present invention provides the hot water according to the first or second aspect , wherein the output of the circulation pump is made less than the output during normal heating operation during the opening / closing operation of the on-off valve. It is a heating device.

The hot water heating apparatus according to claim 3 can suppress useless power of the circulation pump by controlling the output of the circulation pump to be less than the output during the normal heating operation during the opening / closing operation of the on-off valve. That is, since the resistance that the hot water receives from the on-off valve during the opening / closing operation can be suppressed, the hot water can be circulated smoothly.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the hot water heating apparatus has a control method switching means, and the switching means is used to stop the hot water heating apparatus. The hot water heating apparatus is characterized in that the condition can be canceled.

The hot water heating apparatus according to claim 4 can cope with the construction situation on site by providing the switching means. Here, the “falling water” phenomenon is a phenomenon that occurs only in a situation where the heat radiating terminal is installed at a higher position than the hot water heater. Therefore, by providing the switching means in this way, it is possible to control only the site where “waterfall” measures are required. In other words, it can be constructed economically according to the site.

Further, the invention related to the present invention is a hot water heating system comprising a hot water heating apparatus, at least one heat radiating terminal, and a hot water pipe connecting both, wherein the hot water heating system includes an on-off valve and hot water. A temperature detector for detecting temperature is provided, the hot water heater has a heating means and a circulation pump, the hot water heater and the heat radiating terminal each have a control terminal, and the control terminals communicate with each other. When the operation of the heat radiating terminal is stopped, it is determined that the detected temperature of the hot water circulating in the hot water heating system has reached a predetermined temperature or lower, or after the predetermined temperature has been decreased. The hot water heating system is characterized in that, on the condition that time elapses, the circulating pump is stopped, and the closing operation of the on-off valve is executed simultaneously with or before this. .

In the hot water heating system of the related invention, each of the hot water heating device and the heat radiating terminal has a control terminal, and can perform interlinked control by enabling mutual communication. Therefore, the opening / closing operation of the opening / closing valve can be controlled by a time difference or a temperature difference. Further, the circulation pump continues to operate until the temperature reaches a predetermined temperature or below, or until a predetermined time elapses after the temperature falls below the predetermined temperature, and further delays the closing operation of the on-off valve. Therefore, it is possible to prevent hot hot water from staying in the pipe without preventing the hot water from circulating. In other words, even when the heat radiating terminal is installed at a higher position than the hot water heating device, it is possible to prevent “falling down” due to the thermal contraction of the pipe and the inside of the pipe below the atmospheric pressure and the low temperature boiling of the hot water. Become.

The invention according to claim 5 is the invention according to any one of claims 1 to 4 , wherein the on-off valve is provided in the heat radiating terminal, the hot water heating device or the hot water pipe, and the heat radiating terminal. When the operation of the heat radiating terminal is stopped or the on-off valve is closed by a predetermined time before the operation stop, the hot water heating apparatus is characterized in that the on-off valve of the heat radiating terminal is opened.

The hot water heating system according to claim 5 is configured to control to open the on-off valve when the on-off valve provided in the heat radiating terminal is closed by a predetermined time before stopping the operation of the heat radiating terminal. It is possible to circulate hot hot water staying in the piping on the heat radiating terminal side, and further cool the hot water. By doing so, even if the heat radiating terminal is installed at a higher position than the hot water heater, it is possible to prevent the “falling water” phenomenon due to the thermal contraction of the piping and the low temperature boiling of the hot water.

  When the hot water heating apparatus and the hot water heating system of the present invention stop the hot water heating apparatus, the circulating pump is operated, and the hot water in the pipe is cooled. There is no.

  Next, the hot water heating apparatus 2 and the hot water heating system 1 which are embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an operation principle diagram of a hot water heating system 1 (hereinafter also referred to as a heating system 1) according to an embodiment of the present invention. The hot water heating system 1 is configured by combining a hot water heating device 2, a heat radiating terminal 3, and a hot water pipe 23 connecting them. The hot water pipe 23 includes an outgoing pipe 21 that circulates in the system, which will be described later, and a return pipe 22. Furthermore, inside the hot water heater 2, a return side internal connection pipe 18 connected to the return pipe 22 and a forward side internal connection pipe 19 connected to the forward pipe 21 are provided.

  The hot water heating system 1 is a system in which hot water heated by the hot water heating device 2 flows into the heat radiating terminal 3 through the hot water piping 23, dissipates heat, returns to the hot water heating device 2 again, and the hot water circulates. is there.

  The hot water heating device 2 includes an open tank 4, a heat source device 5 having a heat exchanging unit 16, a circulation pump 6, a temperature detector 7 for detecting the temperature of circulating hot water, a control terminal 8, and a forward side. It consists of an on-off valve 13p and a return-side on-off valve 13q.

  The open-type tank 4 is configured by a tank that can store hot water so as not to overflow. The open tank 4 is provided with a through hole 27 communicating with the atmosphere side. Further, the open type tank 4 is arranged so that a return side internal connection pipe 18 connected to the heat source device 5 is connected downstream of a return side on-off valve 13q described later. In other words, the open-type tank 4 is arranged on the return side and upstream of the heat source device 5.

  The heat source device 5 is connected to a return side internal connection tube 18 connected to the open tank 4 and a forward side internal connection tube 19 from which hot water heated by the heat source device 5 is discharged.

The heat source device 5 includes a heat exchange unit 16, a combustion unit (heating means) 17, and a blower device 11 that sends air into the combustion unit 17.
The heat source device 5 heats the heat medium flowing through the return-side internal connecting pipe 18 in the heat exchange unit 16 by heat exchange with the combustion gas generated by burning the fuel in the combustion unit 17, and this is a heat radiating terminal described later. 3 can be supplied.

A fuel supply pipe 25 is connected to the combustion unit 17. The combustion unit 17 can vaporize and burn liquid fuel such as oil supplied via the fuel supply pipe 25. The combustion gas generated by burning the liquid fuel in the combustion unit 17 flows upward through the combustion gas passage 26 provided inside the combustion unit 17.
The heat exchange unit 16 is disposed above the combustion unit 17.

  The blower 11 feeds combustion air into the combustion unit 17. Further, in the present invention, the blower 11 continues to operate for a certain period of time after the operation of the combustion unit 17 is stopped, and promotes cooling of hot hot water circulating through the hot water pipe 23 in addition to the exhaust inside the heat source device 5. it can.

  The circulation pump 6 is provided in the middle of the return-side internal connection pipe 18 that connects the open tank 4 and the heat source device 5 described above. Moreover, the circulation pump 6 is the same as that of a well-known thing, has a water intake port and a discharge port, and pressurizes warm water.

One on-off valve 13 is provided on each of the forward side and the return side. One on-off valve 13p is provided on the outgoing pipe 21 side in the middle of the outgoing side internal connecting pipe 19, and the other on-off valve 13q is on the upstream side of the open-type tank 4 and on the return side internal connecting pipe 18. It is provided in the middle.
The hot water heater 2 is provided with a bypass 20 that connects the return side internal connection pipe 18 and the forward side internal connection pipe 19 respectively connected to the on-off valve 13. As the on-off valve 13 and the on-off valve 10 described later, a thermally operated valve, an electromagnetic valve, or the like can be used. In this embodiment, a thermally operated valve is employed.

  The control terminal 8 is connected by a communication line 29 that can communicate with each other and is connected to a control terminal 9 included in the heat radiating terminal 3 described later. Further, the control terminal 8 has a valve voltage unit 14, and the valve voltage unit 14 is connected to the on-off valve 13 by a control line 30. The valve voltage unit 14 includes two systems that are independent on the forward side and the return side. That is, when the heating system 1 is started and stopped, the on-off valve 13 can be regulated to a predetermined time difference and a predetermined order. In other words, independent voltage output is possible on the forward side and the return side, and the on-off valve 13 can be driven for each system such as the forward side and the return side.

Furthermore, the control terminal 8 can communicate with and control the opening / closing operation of the on-off valve 13 and the control terminal 9 of the heat radiating terminal 3 described later. The control terminal 8 has a power connector that is connected to an external power source and receives power supply.
The control terminal 8 of the present invention is provided with switching means 12. The switching means 12 can switch whether or not to execute the control of the present invention described later. In other words, by enabling control to be switched by the switching means 12, in the heating system 1 that does not worry about "falling water", the time for post circulation and post purge can be shortened, and generation of wasteful power consumption is suppressed. be able to.

Next, the heat radiating terminal 3 to which the forward piping 21 and the return piping 22 are connected will be described.
As the heat radiating terminal 3, a fan convector that uses hot water having a high temperature of about 80 to 85 ° C, a floor heating panel that uses hot water having a low temperature of about 50 to 60 ° C, or the like can be used. The hot water heating system of this embodiment shows a hot water heating system 1 using a fan convector.

The heat radiating terminal 3 is provided with a control terminal 9 and a heat exchanger 28. Further, an opening / closing valve 10 is provided inside the heat radiating terminal 3, and an outward piping 21 and a return piping 22 are connected to the opening / closing valve 10. In FIG. 1, since two heat radiating terminals 3 are shown, the forward and return pipes are indicated by forward pipes 21A and B and return pipes 22A and 22B, respectively.
The control terminal 9 is connected to the remote controller 24, and a command is transmitted to the control terminal 9 by the operation of the remote controller 24, and the operation, control, etc. of the hot water heating system 1 are performed via the communication line 29.

The heat exchanger 28 has a configuration through which an outgoing pipe 21 connected to the hot water heating device 2 that passes through the heat exchanger 28 passes. Hot water heated by the heat source device 5 described above flows inside the forward pipe 21. That is, the heat of the high-temperature hot water heats the gas released from the heat radiating terminal 3 to the outside, and the heating effect can be obtained.
Moreover, if it is a floor heating panel, the floor surface can be heated with the heat which the warm water of the going piping 21 has, and the heating effect can be acquired.

Next, operation | movement of the hot water type heating system 1 of this embodiment is demonstrated in detail, referring drawings.
In the present invention, the maximum feature is exhibited at the time of operation and stop command in the heating system 1, but the operation during operation is also briefly described for convenience.

The operation of the hot water heating system 1 shown in FIG. 1 starts when an operation request from the remote controller 24 is first generated artificially and received by the control terminals 8 and 9.
After the operation command, first, the circulation pump 6 is started, the air blower 11 of the heat source device 5 is rotated, and at the same time, the combustion unit 17 starts combustion, and the hot water in the hot water pipe 23 starts to circulate. And the voltage from the voltage part 14 for valves in the control terminal 8 is output to the going side on-off valve 13p, and the going side on-off valve 13p starts valve opening operation | movement. At this time, the on-off valve 10 on the side of the heat radiating terminal 3 starts the valve opening operation by communication between the control terminals 8 and 9. Further, after a predetermined time has elapsed from the opening of the valve, a voltage is output from the valve voltage unit 14 to the return side on-off valve 13q connected to the return side internal connection pipe 18, and the valve opening operation is started.

  Further, during the opening operation of the on-off valves 10 and 13 at this time, the rotational speed of the motor of the circulation pump 6 is controlled to be lower than that in the normal operation. By controlling in this way, useless power consumption can be suppressed. When the on-off valves 10 and 13 are opened, the hot water heating system 1 is in the heating operation.

Here, the heating operation will be described. Combustion of the combustion unit 17 of the heat source device 5 is always controlled by the temperature of the hot water. That is, based on the temperature detected by the temperature detector 7, the temperature of the hot water circulating inside the heating system 1 is kept constant by ON / OFF control or proportional control.
In the case where the ON / OFF control is employed in the present invention, the predetermined temperature of the hot water when the ON is executed is different from the predetermined temperature of the hot water when the OFF is executed. For example, when the hot water temperature reaches about 80 ° C., the OFF control is executed, and when the hot water temperature decreases to about 65 ° C., the ON control is executed. Furthermore, when the OFF control is executed, the blower 11 performs post-purge for a predetermined time. The present invention may be configured to employ proportional control.

  Control when the hot water heating system 1 is stopped will be described with reference to the control flowchart of FIG.

First, it starts from a stop request generated by the remote controller 24, as in driving.
In step 1, a signal is transmitted to the control terminals 8 and 9 as a stop command. And it progresses to step 2, and it confirms whether the control switch required when the heat radiating terminal device 3 is installed in the position higher than the hot water heating apparatus 2, and if it has been set, it will progress to step 3.

From step 3, the control in this embodiment is performed. In step 3, post circulation is started. That is, the circulation pump 6 is activated and the hot water in the heating system circulates. And if it progresses to step 4 and it is not in the post purge of the state which the combustion part 17 stopped during the above-mentioned heating operation, it will progress to step 5 and the driving | operation of the air blower 11 will be started. However, if the post-purge is being performed in step 4, the process proceeds to step 5 ′, and the operation of the blower 11 is maintained.
The post purge here refers to exhaust of the heat source device 5 and cooling of the hot water in the hot water pipe 23.

  Moreover, useless power consumption can be suppressed by controlling the rotational speed of the motors of the circulation pump 6 and the blower 11 at this time to be lower than the rotational speed during normal operation. On the contrary, by controlling to increase the rotation speed of the motor of the blower 11, the cooling effect of the hot water can be promoted, and accordingly, the stop of the heating system 1 can be accelerated in time.

  Then, after steps 5 and 5 ′, both proceed to step 6, and the valve opening history of the on-off valve 10 remaining in the control terminal 9 is read. Specifically, the on-off valve that was opened between the time when the operation stop command in Step 1 was issued for a certain period of time, for example, between the time when the operation of the heat radiating terminal 3 was stopped and the time 5 minutes before that time. 10 histories are read. Then, if there is a closed on-off valve 10 in the read history, valve opening control is performed. In this control, all the on-off valves 10 of the heat radiating terminal 3 may be controlled to be opened. By performing such control, it is possible to prevent “falling water” due to high-temperature hot water staying in the heat radiating terminal 3.

  Then, the process proceeds to step 7, and if the temperature of the hot water is detected by the temperature detector 7, and the temperature reaches a temperature at which low temperature boiling cannot be performed, the process proceeds to step 8. For example, the temperature at this time can be set to 78 ° C. or lower. At this time, if the temperature does not reach the predetermined temperature or lower, the confirmation in step 7 is performed again, and the confirmation is repeated until the temperature reaches the predetermined temperature or lower.

  In step 8, if the temperature of the hot water detected in step 7 is continuously maintained for a certain time, the process proceeds to step 9. That is, it can be recognized that substantially the entire warm water in the heating system 1 has reached the predetermined temperature by confirming that the state of the predetermined temperature or lower is maintained continuously for a certain period of time. The continuous time at this time can be, for example, 4 minutes.

  However, if the detected temperature does not continue below the predetermined temperature for 4 minutes, the process proceeds to Step 9 ′, and whether or not the predetermined elapsed time from the start of post circulation in Step 3 has passed 20 minutes. It is confirmed. If 20 minutes have not passed, step 8 is passed again. On the other hand, if 20 minutes have passed, the process proceeds to step 9. By performing such control, it is possible to avoid the problem that power is consumed by the circulation pump 6 and the on-off valves 10 and 13 for a long time.

  In step 9, the return side on-off valve 13q is closed and the routine proceeds to step 10. In step 10, the on-off valve 10 inside the heat radiating terminal 3 is closed, and the process proceeds to step 11. In step 11, the forward opening / closing valve 13 p is closed, and in step 12, the blower 11 is stopped. Further, in step 13, the post circulation is stopped (circulation pump stop), and the heating system is stopped. In the present embodiment, a thermally operated valve is used as the on-off valve 13, and a feature that takes time to open and close the on-off valve 13 is also used.

Here, if the switching of the switching means 12 has not been switched in step 2 described above, the routine proceeds to step a, where post circulation is started. That is, since the heat radiating terminal 3 is not installed at a high position, there is no fear of “falling water”. Therefore, the control of this embodiment is not performed. As a result, the control setting does not cause unnecessary power consumption, which is economical.
In step b, if 10 minutes have passed since the start of post circulation, the process proceeds to step c, and the on-off valves 10 and 13 are closed. In addition, if 10 minutes have not elapsed at this time, the elapsed time is confirmed until it has elapsed. And it progresses to step d, post circulation stops, and heating system 1 stops.

By providing the above-described control, the hot water heating device 2 and the hot water heating system 1 of the present embodiment are arranged on the side of the heat radiating terminal 3 even when the heat radiating terminal 3 is installed at a higher position than the hot water heating device 2. Even if the pressure in the piping is equal to or lower than the atmospheric pressure, the problem of hot water boiling at a low temperature can be prevented.
That is, in the present invention, post circulation is started after the stop command for the heating system 1 from the heat radiating terminal 3 side, and the operation of the blower 11 is also started accordingly. At that time, the opening / closing valve 10 on the side of the heat radiating terminal 3 opened 5 minutes before the stop command of the heating system 1 is opened, and hot hot water in the pipe starts to circulate in the pipe. This makes it possible to reliably perform post circulation even when a plurality of heat radiating terminals 3 are used.

Next, the hot water in the pipe is cooled to a predetermined temperature or lower (78 ° C. in this embodiment), and the temperature or lower is continued for a predetermined time (four minutes in this embodiment) continuously or after the start of post circulation. When the time (20 minutes in this embodiment) has elapsed, the on-off valves 10 and 13 are closed in a predetermined time difference and in a predetermined order, the operation of the blower 11 is stopped, and the heating system 1 is stopped.
Therefore, this invention can prevent "falling down" due to the low temperature boiling of the hot water in the pipe by performing the above-described control as the hot water heating system 1 including such a hot water heating device 2. .

In the hot water heating device 2 and the hot water heating system 1 of the above embodiment, the configuration in which the on-off valve 13 is provided inside the hot water heating device 2 is shown, but the present invention is not limited to this.
For example, the structure provided in the middle of the hot water piping 23 which connects the hot water heating apparatus 2 and the thermal radiation terminal 3 may be sufficient. However, in this case, it is necessary to provide one on-off valve 13 for each of the forward and return pipes. When there are a plurality of heat radiating terminals 3, it is necessary to provide the on-off valve 13 in each of the forward piping 21 and the return piping 22, so that there is a concern that the cost becomes unnecessarily expensive and uneconomical. In other words, with the configuration as in the above embodiment, even if there are a plurality of heat radiating terminals 3, only one on-off valve 13 is required for each of the forward piping 21 and the return piping 22, so it is not costly and economical. Is.

In the hot water heating device 2 and the hot water heating system 1 of the above embodiment, the combustion unit (heating means) 17 in the heat source device 5 has been configured to burn with oil fuel, but the present invention is limited to this. is not.
For example, the combustor 17 may be configured to burn with gas. The heating means 17 may be electric heating.

In the hot water heating device 2 and the hot water heating system 1 of the above embodiment, the temperature detector 7 provided in the hot water heating device 2 detects the temperature of the circulating hot water and performs control. Is not limited to this.
For example, the structure which provides the temperature detector 3 in the thermal radiation terminal 3, and controls by the temperature of the warm water detected there may be sufficient.

In the hot water heating device 2 and the hot water heating system 1 of the above embodiment, the configuration in which the blower 11 is operated after the post circulation in step 3 shown in FIG. 2 is shown, but the present invention is not limited to this. Absent.
For example, step 6 may be confirmed after step 3 post-circulation or simultaneously with step 3 post-circulation, followed by steps 4, 5, 5 ′. Also in this case, it is preferable that the order after step 7 is the same as that in the above embodiment. In this case, the predetermined time before reading the valve opening history of the heat radiating terminal 3 is equal to or less than the time five minutes before the stop of the heat radiating terminal 3 shown in the above embodiment is commanded. It doesn't matter.

It is an operation principle figure of a warm water type heating system. It is a flowchart which shows operation | movement of the hot water type heating system shown in FIG.

DESCRIPTION OF SYMBOLS 1 Hot water type heating system 2 Hot water heating system 3 Heat radiation terminal device 4 Open type tank 5 Heat source device 6 Circulation pump 7 Temperature detector 8 Control terminal 9 Control terminal 10 On-off valve 11 Blower device 12 Switching means 13 On-off valve 17 Combustion part (heating) means)
21 Outward piping 22 Return piping 23 Hot water piping

Claims (5)

A hot water heating apparatus provided in the hot water heating system and connected to an external heat radiating terminal,
The hot water heating apparatus has a circulation pump, a combustion part that is a heating means for heating the hot water, a temperature detector that detects the temperature of the hot water , and a blower that supplies air to the combustion part ,
The hot water heating device and the heat radiating terminal are connected by hot water piping,
The hot water pipe is composed of a forward pipe through which hot water flows to the radiator terminal side and a return pipe through which the hot water flows to the hot water heater side,
The hot water heating device, or the forward piping and the return piping are provided with on-off valves,
Each of the on-off valves is driven at a predetermined time difference and in a predetermined order when the operation of the hot water heater is started and when the operation is stopped. After the predetermined time has elapsed, the return-side on-off valve is opened. When the operation is stopped, the return-side on-off valve is first closed, and after the predetermined time has elapsed, the forward-side on-off valve Is to close,
When stopping the hot water heater, the circulation pump is provided on the condition that the temperature detected by the temperature detector has reached a predetermined temperature or lower, or on the condition that a predetermined time has passed since the temperature has been reduced to a predetermined temperature or lower. Until the temperature detected by the temperature detector reaches or falls below a predetermined blowing stop temperature, or until a certain time has elapsed after the temperature has fallen below the predetermined blowing stop temperature. A hot water heating apparatus characterized by operating at a higher output than that during operation . At the start of operation of the hot water heater, the circulation pump starts operation before the opening / closing valve that starts the valve opening operation first or when the opening / closing valve opens,
When the operation of the hot water heater is stopped, the operation of the circulation pump is stopped when the on-off valve that is closed last is closed or after a predetermined time has elapsed since the on-off valve was closed. The hot water heater according to claim 1 . The During opening and closing operation of the opening and closing valve, the hot water heating system according to claim 1 or 2, characterized in that below the output during normal heating operation the output of the circulation pump. The hot-water heating device has a switching means of the control method, by the switching means, to any one of claims 1 to 3, characterized in that it is possible to release the conditions for stopping the hot-water heater The hot water heater described. The on-off valve is provided in the heat radiating terminal and the hot water heating apparatus or the hot water pipe, and the operation of the heat radiating terminal is stopped or opened and closed before a predetermined time before the operation of the heat radiating terminal is stopped. The hot water heater according to any one of claims 1 to 4 , wherein when the valve is closed, the on-off valve of the heat radiating terminal is opened.

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