JP2014047976A - Heating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating system capable of continuing a heating operation state while effectively utilizing residual heat of hot water.SOLUTION: In a floor heating system 1 which performs floor heating by circulating hot water, a remote control 4A has a control mode selecting switch 43 for making the floor heating system 1 perform residual heat utilization operation. During the residual heat utilization operation, the floor heating system 1 performs the floor heating by utilizing residual heat of hot water in piping without performing, in principle, combustion heating with a burner 21a. In order to utilize the residual heat of the hot water remained in a heat source machine 2 and another heating terminal 5, the floor heating system 1 also circulates the same for the floor heating with the residual heat of the hot water remained not only in the piping but also in other sections.

Description

  The present invention relates to a heating device such as a hot water floor heating device.

  This kind of conventional hot water floor heating device includes, for example, a combustion device composed of a gas burner and the like, a heat source device having a circulation pump, and a floor heating terminal, as disclosed in Patent Document 1 below. A heating medium (hot water) heated to a predetermined temperature is circulated to the floor heating terminal by a circulation pump, and the room heating is performed by radiating heat from the heating medium at the floor heating terminal.

JP 2002-257367 A

  In a so-called low-temperature heating terminal such as a floor heating terminal, it is common to circulate a heating medium whose heating is controlled at a target temperature of about 60 ° C. However, the heating operation switch of the floor heating remote control is set to “OFF”. Even if the heating operation is stopped, the heat medium inside the floor heating terminal is kept warm for a while. Therefore, heating using the residual heat of the heat medium can be continued for a while by turning off the heating operation switch.

  However, in addition to the inside of the floor heating terminal, a warm heat medium remains in the inside of the heat medium circulation pipe in the heat source machine and the connection pipe between the heat source machine and the floor heating terminal. Since the floor heating terminal has a structure with high heat dissipation, the heat medium remaining in the floor heating terminal is easy to cool, while the heat medium in other pipes is relatively difficult to cool. By circulating the heat medium to the floor heating terminal, it is possible to make more effective use of the remaining heat, but the conventional floor heating remote control has only a heating operation switch and a switch for performing various settings. When the operation switch is turned off, the operation stop process is executed, and the heating operation state cannot be continued while using the remaining heat.

  Then, an object of this invention is to provide the heating apparatus which can continue a heating operation state, utilizing the residual heat of a heat medium effectively.

  In order to achieve the above object, the present invention takes the following technical means.

  That is, the present invention includes a first heating terminal, a heat source unit, and a remote controller for the first heating terminal, and the heat source unit circulates a heating medium (hot water) in the first heating terminal. Circulation means, a combustion apparatus for heating the heating medium, a first temperature sensor for detecting the temperature of the heating medium heated by the combustion apparatus, and operations of the heating medium circulation means and the combustion apparatus Control means for controlling, and the remote control includes an operation operation unit for instructing the control means to turn on / off the heating operation by the first heating terminal, and the control means is a combustion mode as a control mode. In the heating apparatus having a normal operation control mode for controlling the heat medium circulating means and the combustion apparatus so that the heat medium heated by the apparatus reaches a predetermined normal target temperature, the remote controller is a first heating terminal. Control mode switching operation for The control means further includes a residual heat utilization operation control mode in which heating control of the heat medium by the combustion device based on the normal target temperature is not performed as a control mode. In addition, the normal operation control mode and the residual heat utilization operation control mode are switched by the operation of the control mode switching operation unit (claim 1).

  According to the heating device of the present invention, when the start of the heating operation is instructed by the operation of the operation operation unit, first, the control means is set to the normal operation control mode and based on the predetermined normal target temperature. The heating medium is controlled by heating, and the heating medium circulating means and the combustion apparatus are controlled so as to circulate to the first heating terminal by mixing the heating medium as it is or with a cooled heating medium returned from the first heating terminal. To do. On the other hand, when the user operates the control mode switching operation section to switch to the residual heat utilization operation control mode for the purpose of saving utility costs, the control means does not perform the heating control based on the target temperature at normal time. The medium circulation means and the combustion apparatus are controlled. In this residual heat utilization operation control mode, the heating device temperature is gradually decreased as compared with the normal operation because the heating control of the combustion device based on the normal target temperature is not performed. Although the operation is not performed, the heating operation itself can be continued although the temperature of the heat medium is somewhat low, and the user can experience the heating effect for a long time by appropriately designing the control contents of the residual heat utilization operation control mode. For example, by circulating the heat medium between the heat source unit and the first heating terminal in the residual heat utilization operation control mode, for example, the inside of the heat source unit or the connection pipe between the heat source unit and the first heating terminal It is also possible to effectively use the remaining heat of the heat medium remaining in the heat medium.

  In the present invention, the first heating terminal is preferably a low-temperature heating terminal such as a floor heating terminal. In the case of the floor heating terminal, the user can experience the heating continuation effect even if the heat medium temperature slightly decreases. be able to. Moreover, it is preferable to arrange | position a remote control in the same room as a heating terminal.

  Further, the heat medium circulating means can include a heat medium circulation pipe in the heat source unit and a circulation pump provided in the middle of the circulation pipe, and further, a thermal operation that opens and closes the pipe of the circulation pipe to the heating terminal. When a plurality of heating terminals are provided, a circulation valve can be configured in common by providing a thermal valve for each heating terminal. The heat medium circulation pipe includes a high temperature side heat medium temperature sensor that detects the temperature of the heat medium after being heated by the combustion device, and a low temperature side that detects the temperature of the heat medium circulated to the first heating terminal. It is preferable to provide a heat medium temperature sensor.

  The driving operation unit and the control mode switching operation unit are preferably an operation device capable of one-touch operation, such as a push button switch, but may have other appropriate configurations.

  Specific control contents in the normal operation control mode in the control means can be various conventionally known ones. In other words, any heating medium may be used as long as it controls the heating medium with a predetermined normal target temperature as a target temperature. The heating medium circulation to the first heating terminal may be stopped, or the heating medium temperature may be temporarily lowered below the normal target temperature in the process of the heating control.

  In addition, the specific control content in the residual heat utilization operation control mode is also such that the temperature of the heat medium heated by the combustion device is relatively greatly reduced from the target temperature without performing heating control of the heat medium based on the target temperature at the normal time. If this is permitted, the stop or restart of circulation to the first heating terminal by the heat medium circulation means can be appropriately configured as necessary. For example, in the residual heat utilization operation control mode, the circulation of the heat medium to the first heating terminal may be stopped constantly, and the circulation of the heat medium to the first heating terminal is always continued. In addition, control is performed so that the circulation of the heat medium to the first heating terminal is stopped or restarted according to the conditions such as the temperature and room temperature of the heat medium circulated to the first heating terminal. It may be. Furthermore, it is also possible to control the combustion apparatus so as to perform heating control based on the target temperature at the time of using residual heat that is lower than the target temperature at normal time.

  Note that in recent heat source machines for heating, a heat exchanger that heat-exchanges and heats the heat medium with heat released from the combustion device is generally provided, and the heat medium temperature at the outlet of the heat exchanger is relatively high (for example, The relatively high temperature heating medium is supplied as it is to a high temperature heating terminal, a heat exchanger for bathing, or the like. On the other hand, in a low-temperature heating terminal such as a floor heating terminal, a predetermined normal target temperature (for example, 60 ° C.) is obtained by mixing the high-temperature heat medium and a cold heat medium that returns after releasing heat at each terminal. ), And this relatively low temperature heating medium is supplied.

  In the present invention, the “heat medium heated by the combustion device” is a heat medium immediately after being heated by the combustion device, and the heat medium immediately after the heating is supplied as it is to a low-temperature heating terminal such as a floor heating terminal. The present invention can also be implemented as a heating device dedicated to a low-temperature heating terminal, or a low-temperature heating medium formed by mixing a high-temperature heating medium heated by a combustion device and a cooled heating medium returned from the heating terminal. It is also possible to implement the present invention as a heating apparatus that can supply a low-temperature heating terminal such as a floor heating terminal and the high-temperature heating medium to the high-temperature heating terminal. In the former case, the temperature of the heat medium heated by the combustion device is equal to the temperature of the heat medium circulated to the first heating terminal, and according to the request for the temperature of the heat medium circulated to the first heating terminal, The target temperature of the heat medium heated by the combustion device can be set. On the other hand, in the latter case, heating control of the heating medium by the combustion device is controlled with a relatively high temperature (for example, 80 ° C.) as a target temperature, and the temperature of the heating medium circulated to the first heating terminal is returned from the heating terminal. Depending on the mixing ratio with the cooled heat medium, the temperature becomes relatively low (for example, around 60 ° C.).

  The heating apparatus of the present invention further includes a second heating terminal capable of circulating the heat medium by the heat medium circulation means, and the control means remains in the second heating terminal in the residual heat utilization operation control mode. The heating medium circulating means can be controlled so as to circulate the heating medium to the first heating terminal (claim 2). According to this, the remaining heat of the heat medium remaining in the other second heating terminal can be effectively used to perform heating by the first heating terminal, and wasteful energy consumption is performed in the other heating terminal. By avoiding this, it is possible to further reduce the utility cost.

  The second heating terminal may have a configuration similar to that of the first heating terminal or may be a heating terminal having a different configuration. For example, when the first heating terminal is a floor heating terminal, the second heating terminal may be a floor heating terminal, or the second heating terminal may be a high temperature heating terminal such as a bathroom heating device. .

  In the heating device of the present invention, when the first heating terminal is operated in the residual heat utilization operation control mode, the controller starts the first heating operation when the second heating terminal is started. The operation of the heat medium circulating means and the combustion device can be controlled so that the heat medium circulation to the heating terminal is stopped and the heat medium having a predetermined temperature is circulated to the second heating terminal. According to this, during the heating operation of the second heating terminal, the heat medium heated by the combustion device is circulated to the first heating terminal by stopping circulation of the heat medium to the first heating terminal. This can be prevented and heating by the residual heat of the heat medium staying in the first heating terminal can be continued. When the second heating terminal is a high temperature heating terminal, a high temperature hot water outlet for the high temperature heating terminal can be provided, and the operation can be controlled so that a high temperature heating medium of about 80 ° C. is circulated to the second heating terminal.

  Moreover, in the heating apparatus of the present invention, the control means supplies the heating terminal to each heating terminal according to the heat medium temperature and / or the heat medium circulation duration time circulated to the first heating terminal in the residual heat utilization operation control mode. The heating medium circulating means can be controlled so as to stop the circulation of the heating medium. According to this, immediately after switching to the residual heat utilization operation control mode, by the heat medium circulation, in the second heating terminal, in the heat source machine, or in the connection pipe between the heat source machine and the first and second heating terminals. While effective utilization of the residual heat of the remaining heat medium, if the heat medium temperature decreases to some extent by operating the residual heat for a while, the effect of further circulation cannot be expected, so by stopping the circulation of the heat medium, It is possible to save power consumption in the heat medium circulating means. The “heating medium circulation continuation time” is the time during which the heating medium is continuously circulated to the first heating terminal during the residual heat utilization operation control mode, and is temporarily sent to the first heating terminal. When the circulation is stopped and then restarted, it is the duration from the restart point.

  The control means continues the circulation of the heat medium to the first heating terminal until the predetermined circulation stop condition is satisfied in the residual heat utilization operation control mode, and if the circulation stop condition is satisfied, the first heating terminal The heating medium circulating means can be controlled so as to stop the circulation of the heating medium. According to this, immediately after switching to the residual heat utilization operation control mode, effective utilization of the residual heat of the heat medium remaining in the heat source machine or in the connection pipe between the heat source machine and the first heating terminal is achieved by heat medium circulation. On the other hand, if the temperature of the heat medium is lowered to some extent by operating for a while using the remaining heat, it is not possible to expect much effect for further circulation. be able to.

  The circulation stop condition can be various, for example, (1) the temperature of the heat medium circulated to the first heating terminal has decreased to a predetermined circulation stop temperature when using residual heat, (2) The heat medium circulation continuation time under the residual heat utilization operation control mode exceeds a predetermined time, or (3) the logical sum or logical product of (1) and (2) above can be used as the circulation stop condition. The “heating medium circulation duration under the residual heat utilization operation control mode” is a time during which the heat medium is continuously supplied and circulated to the first heating terminal by the heat medium circulation means during the residual heat utilization operation control mode. When the circulation is temporarily stopped and then restarted, it is the duration from the restart point.

  Moreover, the said control means can control the said heat-medium circulation means so that the circulation of the heat medium to the 1st heating terminal may be stopped at the remaining heat utilization operation control mode (Claim 6). According to this, the circulation pipe in the heat source machine and the piping length between the heat source machine and the heating terminal are relatively short, and the amount of heat medium in these pipes is relatively small, so the residual heat utilization effect by circulation is small. In this case, it is possible to reduce the power consumption for driving the heat medium circulating means and to reduce the utility cost as a whole.

  Further, the control means circulates the heat medium to the first heating terminal by satisfying a predetermined circulation resumption condition after stopping the circulation of the heat medium to the first heating terminal in the residual heat utilization operation control mode. The heating medium circulating means can be controlled to resume (Claim 7). According to this, for example, when the circulation of the heat medium to the first heating terminal is stopped, when the temperature of the heat medium in the heat source apparatus rises due to the operation of the other heating terminal, the heat medium temperature is reduced. By setting the temperature rise to a predetermined temperature as a circulation resumption condition, the heat medium temperature in the first heating terminal can be increased again by circulating the heat medium in the heat source machine to the first heating terminal. The heating effect can be experienced for a long time.

  Moreover, the said control means can control the said combustion apparatus so that the heating of a heat medium may be stopped in the residual heat utilization operation control mode. According to this, heating by residual heat can be performed while saving fuel consumption in the combustion device in the residual heat utilization operation control mode significantly.

  Further, the control means is configured to cause the heat medium circulating means and the combustion so that the temperature of the heat medium circulated to the first floor heating device becomes a predetermined target temperature during the remaining heat operation in the remaining heat utilization operation control mode. The device can be controlled (claim 9). According to this, while the fuel consumption in the combustion device in the remaining heat utilization operation control mode is reduced than in the normal operation control mode, the heating operation with the remaining heat is performed until the heat medium temperature is reduced to the heat medium temperature during the remaining heat operation. Can be performed. On the other hand, when the temperature of the heat medium detected by the temperature sensor of the heat source device has decreased to the heat medium temperature during the remaining heat operation, the heat medium is controlled so that the temperature does not decrease any further, thereby minimizing the fuel consumption. The heating effect can be continuously generated.

  Further, the control means may be configured to automatically switch to the normal operation control mode when a predetermined normal operation return condition is satisfied in the residual heat utilization operation control mode (claim 10). According to this, when the operation control mode using residual heat is continued for a predetermined time or more, the temperature of the heat medium is greatly decreased, or the room temperature is greatly decreased, the normal operation return condition corresponding to each is set. Thus, the normal heating operation can be performed by automatically returning to the normal operation control mode.

  Furthermore, the control means may include a timer, and the normal operation return condition may include that the elapsed operation time in the residual heat utilization operation control mode exceeds a predetermined set time (claim 11). When the operation in the residual heat utilization operation control mode is continued beyond a predetermined time set in advance, the normal operation control mode can be automatically restored.

  In addition, the remote controller can be provided with a remaining heat use operation time setting means for setting the set time (claim 12). According to this, the user sets the set time as desired. Can do.

  The remote controller may include a room temperature sensor, and the normal operation return condition may include that the room temperature detected by the room temperature sensor has dropped below a predetermined lower limit temperature (claim 13). It is possible to prevent the room temperature from dropping below a predetermined temperature even though the heating operation is turned on by the operation unit.

  As described above, according to the heating device of the first aspect of the present invention, when the start of the heating operation is instructed by the operation of the operation operation unit, first, the control means is set to the normal operation control mode. The heating medium is controlled to be heated based on a predetermined normal target temperature, and the heating medium is mixed as it is or with a cooled heating medium returned from the first heating terminal so as to be circulated to the first heating terminal. In addition, the heat medium circulating means and the combustion apparatus can be controlled. On the other hand, when the user operates the control mode switching operation section to switch to the residual heat utilization operation control mode for the purpose of saving utility costs, the control means does not perform the heating control based on the target temperature at normal time. The medium circulating means and the combustion apparatus can be controlled. In this residual heat utilization operation control mode, the heating device temperature is gradually decreased as compared with the normal operation because the heating control of the combustion device based on the normal target temperature is not performed. Although the operation is not performed, the heating operation itself can be continued although the temperature of the heat medium is somewhat low, and the user can experience the heating effect for a long time by appropriately designing the control contents of the residual heat utilization operation control mode. For example, by circulating the heat medium between the heat source unit and the first heating terminal in the residual heat utilization operation control mode, for example, the inside of the heat source unit or the connection pipe between the heat source unit and the first heating terminal It is also possible to effectively use the remaining heat of the heat medium remaining in the heat medium.

  Moreover, according to the heating apparatus which concerns on Claim 2 of this invention, the remaining heat of the heat carrier which remains in another 2nd heating terminal can be used effectively, and the heating by a 1st heating terminal can be performed, By avoiding wasteful energy consumption in other heating terminals, it is possible to further reduce utility costs.

  Moreover, according to the heating apparatus which concerns on Claim 3 of this invention, during the heating operation of a 2nd heating terminal, by stopping the heat-medium circulation to a 1st heating terminal, the heat heated with the combustion apparatus It is possible to prevent the medium from being circulated to the first heating terminal and to continue the heating by the residual heat of the heat medium staying in the first heating terminal. When the second heating terminal is a high-temperature heating terminal, the operation can be controlled so that a high-temperature heating medium at about 80 ° C. is circulated to the second heating terminal from the high-temperature outlet for the high-temperature heating terminal.

  Moreover, according to the heating apparatus which concerns on Claim 4 of this invention, immediately after switching to the residual heat utilization operation control mode, in a 2nd heating terminal, a heat source machine, a heat source machine, and the 1st and Since the remaining heat of the heat medium remaining in the connection pipe with the second heating terminal is effectively used, if the heat medium temperature is lowered to some extent by operating the remaining heat for a while, the effect cannot be expected for further circulation. By stopping the circulation of the heat medium, it is possible to save power consumption in the heat medium circulation means.

  Moreover, according to the heating apparatus which concerns on Claim 5 of this invention, immediately after switching to the residual heat utilization operation control mode, in a heat source machine or in the connection piping of a heat source machine and a 1st heating terminal by heat-medium circulation. While effective utilization of the residual heat of the remaining heat medium, if the heat medium temperature decreases to some extent by operating the residual heat for a while, the effect of further circulation cannot be expected, so by stopping the circulation of the heat medium, It is possible to save power consumption in the heat medium circulating means.

  Further, according to the heating device of the sixth aspect of the present invention, the circulation pipe in the heat source machine and the pipe length between the heat source machine and the heating terminal are relatively short, and the amount of the heat medium in these pipes is compared. Therefore, when the residual heat utilization effect due to circulation is small, the power consumption for driving the heat medium circulation means can be reduced, and the utility cost can be saved as a whole.

  Further, according to the heating device according to claim 7 of the present invention, for example, when the circulation of the heat medium to the first heating terminal is stopped, the temperature of the heat medium in the heat source machine by the operation of the other heating terminal. When the heating medium temperature rises to a predetermined temperature, the circulation restart condition is set so that the heating medium in the heat source machine is circulated to the first heating terminal, so that the heating medium temperature in the first heating terminal is increased. The heating medium temperature can be increased again, and the heating effect can be experienced for a long time.

  Moreover, according to the heating apparatus which concerns on Claim 8 of this invention, heating by a residual heat can be performed, saving the fuel consumption in the combustion apparatus at the time of a residual heat utilization operation control mode significantly.

  According to the heating device of the ninth aspect of the present invention, the fuel consumption in the combustion device in the remaining heat utilization operation control mode is reduced to the heat medium temperature during the remaining heat operation, while reducing the fuel consumption in the remaining heat utilization operation control mode than in the normal operation control mode. Until this is done, heating operation using residual heat can be performed. On the other hand, when the temperature of the heat medium detected by the temperature sensor of the heat source device has decreased to the heat medium temperature during the remaining heat operation, the heat medium is controlled so that the temperature does not decrease any further, thereby minimizing the fuel consumption. The heating effect can be continuously generated.

  Further, according to the heating device according to claim 10 of the present invention, when the residual heat utilization operation control mode is continuously operated for a predetermined time or more, the heat medium temperature is greatly decreased, or the room temperature is greatly decreased, respectively. By setting the normal operation return condition corresponding to the above, it is possible to automatically return to the normal operation control mode and perform the normal heating operation.

  Moreover, according to the heating apparatus which concerns on Claim 11 of this invention, when the driving | operation of the residual heat utilization operation control mode continues exceeding the preset predetermined time, it can be made to return automatically to normal operation control mode. .

  Moreover, according to the heating apparatus which concerns on Claim 12 of this invention, a user can set the said setting time as he desires.

  Moreover, according to the heating apparatus which concerns on Claim 13 of this invention, it can prevent that room temperature falls below predetermined temperature, although heating operation is set by the operation part.

It is a schematic block diagram which shows the heating apparatus which concerns on one Embodiment of this invention. It is a circuit diagram which shows one Example of a heat source machine. It is a timing chart of operation | movement of the combustion apparatus and heat-medium circulation means at the time of residual heat utilization operation control mode.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.

  FIG. 1 shows a heating device 1 according to an embodiment of the present invention. The heating device 1 includes a heat source unit 2 having a heating function, two floor heating terminals 3A and 3B as low temperature heating terminals, Mainly composed of floor heating remote controllers 4A and 4B provided corresponding to the floor heating terminals 3A and 3B, respectively, and one high temperature heating terminal 5. In FIG. 1, only the main part of the heat source device 2 is illustrated, but as the heat source device 2, a composite heat source device having functions of hot water supply / heating and reheating as shown in FIG. 2 can be suitably used. .

  First, the configuration of the heat source unit 2 will be described in detail. As shown in FIG. 2, the heat source unit 2 includes a heating can body 21 on the left side of the drawing, a heating circuit 22 with a bath reheating function, and a hot water supply on the right side of the drawing. Two systems of can bodies and a piping system including a can body 23 and a hot water supply circuit 24 are provided. Each of the cans 21 and 23 includes a plurality of burners (combustion devices) 21a and 23a for burning fuel such as gas and kerosene, and a plurality of blower fans 21b and 23b for supplying combustion air to the burners 21a and 23a. Solenoid valves 21c, 23c for controlling the fuel supply to the respective combustion regions of the burners 21a, 23a, and primary heat exchangers 21d, 23d for recovering sensible heat of the combustion gas by burning the fuel with the burners 21a, 23a. And secondary heat exchangers 21e and 23e for recovering the thermal energy of the combustion gas that could not be recovered by the primary heat exchangers 21d and 23d, that is, latent heat, respectively. A condensed water neutralizing device 25 is shown in the center of the figure, and the condensed water collected from the secondary heat exchangers 21e and 23e in each can 21 and 23 can be neutralized and drained. Yes. Moreover, in FIG. 1, it has illustrated as a simplified circuit diagram which abbreviate | omitted the secondary heat exchanger.

  The heating circuit 22 forms a heat medium circulation path between the high temperature heating terminal 5 and the low temperature heating terminals 3A and 3B, and heats a heating heat medium (heat medium) circulating in the circulation path. The primary heat exchanger 21d, a high-temperature heating forward pipe 26 for supplying a high-temperature heating medium heated to a predetermined temperature (for example, about 80 ° C.) to the high-temperature heating terminal by the heat exchanger 21d, and a high-temperature heating terminal A heating return pipe 27 for returning the heat medium after radiating heat to the primary heat exchanger 21d, and the heating return pipe 27 branches upstream from the primary heat exchanger 21d and is heated by the primary heat exchanger 21d. A low-temperature heating forward line 28 for supplying the previous low-temperature (about 60 ° C.) heat medium to the low-temperature heating terminal, and a part of the high-temperature heat medium heated by the primary heat exchanger 21d are connected to the heating return line 27. And a bypass line 29 that bypasses the main line.

  In addition, a plurality of connection ports 28a to which a plurality of low temperature heating terminals can be connected in parallel are provided at the downstream end of the low temperature heating outgoing pipeline 28, and each connection port 28a has heat for opening and closing the pipeline. A valve 28b is incorporated. In addition, the high-temperature heating outbound pipe 26 is provided with a high-temperature heat medium sensor (not shown) that detects the temperature of the high-temperature heat medium heated by the primary heat exchanger 21d, and a detection signal of the sensor is a control described later. The data is input to the unit 38.

  In addition, the high temperature heating terminal thermal valve 5a is built in the high temperature heating terminal 5, and by opening and closing the thermal valve 5a by an operation switch (not shown) provided on the casing of the high temperature heating terminal 5 or the like, Heating operation start and operation stop of the high temperature heating terminal 5 can be performed. The high-temperature heating terminal 5 is provided with a control unit 5b that is communicatively connected to the control unit 38 of the heat source unit 2. The control unit 5b controls the thermal valve 5a and changes the operation state to the heat source unit 2. To the control unit 38, and the supply of the high-temperature heat medium by the heat source device 1 is started.

  Further, the heating return pipe 27 has a first return pipe 27a for guiding the heat medium returned from the high-temperature heating terminal to the secondary heat exchanger 21e, and the heat medium preheated by the secondary heat exchanger 21e as primary heat. The second return pipe 27b led to the exchanger 1d is preliminarily heated by the secondary heat exchanger 21e in the process of returning the heat medium to the primary heat exchanger via the heating return pipe 27. An expansion tank 30 and a heating circulation pump 31 provided on the downstream side of the tank 30 are interposed in the middle of the second return conduit 27b. The low-temperature heating forward pipe 28 is branched from the second return pipe 27 b on the downstream side of the heating circulation pump 31. The bypass line 29 is branched from the high temperature heating forward line 26 and joined to the second return line 27 b on the upstream side of the expansion tank 30 and the heating circulation pump 31. The expansion tank 30 is provided with a low-temperature heat medium thermistor 30a (a temperature sensor for detecting the temperature of the heat medium circulated to the low-temperature heating terminal) for measuring the temperature of the heat medium flowing through the heating return pipe 27. ing.

  In addition, the bypass pipe 29 has a relatively small diameter main pipe 29a and a relatively small diameter sub-line 29b arranged in parallel, and the sub-line 29b is always opened to ensure a minimum flow rate. The main pipeline 29a is provided with a bypass thermal valve 32 as a flow control valve, and the flow rate of the heat medium flowing through the bypass pipeline 29 can be adjusted by controlling the opening and closing of the bypass thermal valve 32. The bypass thermal valve 32 is used for the operation of the hot dash function of the low temperature heating terminal, the temperature adjustment of the heat medium supplied to the other low temperature heating terminals, etc., and is always used when heating and reheating are used simultaneously. It is closed. When there is a hot dash request or the like, the bypass thermal valve 32 is opened to bypass a higher temperature heat medium to the heating return pipe 27 so that the return temperature is higher than normal (about 70 ° C.). This makes it possible to supply a low-temperature heating terminal with a heat medium having a temperature higher than normal.

  Further, the heating circuit 22 uses a part of the high-temperature heat medium heated by the primary heat exchanger 21d on the upstream side (primary heat exchanger 21d side) of the high-temperature heating forward pipe from the branch portion of the bypass pipe 29. A diversion branch for diverting from the path 26 and supplying it to the heat exchanger 33 for heating (described later), and then joining the second return line 27b of the heating return line 27 on the upstream side of the expansion tank 30. A conduit 34 is provided. Furthermore, the heating circuit 22 has a bath water recirculation circuit 35 that forms a circulation path of bath water with the bathtub, a bath water that flows through the bath water retrace circuit 35, and a high-temperature that flows through the retreat branch line 34. The reheating heat exchanger 33 for replenishing and heating the bath water by liquid-liquid heat exchange with the heat medium is provided. The reheating branch pipe 34 is provided with a reheating thermal valve 36 as a reheating control valve for opening and closing the reciprocating pipe 34, and the bath water reheating circuit 35 circulates the bath water. The bath circulation pump 37 is interposed.

  Various control devices such as the blower fans 21b and 23b, the electromagnetic valves 21c and 23c, the heating circulation pump 31, the bypass thermal valve 32, the reheating heat valve 36, the bath circulation pump 37, and the low temperature heating terminal thermal valve 28b are It is controlled by a control unit 38 (control means) mainly constituted by a microcomputer. The heating medium heating control by the burners 21a and 23a is indirectly performed through the control of the electromagnetic valves 21c and 23c. The heating circulation pump 31 and the low temperature heating terminal thermal valve 28a constitute a heat medium circulating means for circulating a heat medium to each low temperature heating terminal, and heat is supplied to the low temperature heating terminal connected to any one of the connection ports 28a. When circulating the medium, the heating circulation pump 31 is operated and the corresponding thermal valve 28b is opened. On the other hand, the heat medium circulation to the low-temperature heating terminal can be stopped by stopping the heating circulation pump 31 or by closing the corresponding thermal valve 28b even when the pump 31 is in operation.

  As the upper control means, the floor heating remote controllers 4A and 4B are installed on the wall surface of the room where the corresponding floor heating terminals 3A and 3B are installed, respectively, and a bath / hot water remote controller (not shown) is installed in the bathroom. These remote controllers can be used to individually set and control whether to perform a follow-up operation, whether to perform a hot water supply operation, whether to operate a low-temperature heating terminal, etc. The sowing target temperature, the operating intensity and operating time of the low-temperature heating terminal, the hot water supply temperature, and the like can be set. The setting information set in each remote controller is transmitted to the control unit 38 of the heat source unit, and the control unit 38 controls each control device constituting the heat source unit 2 based on the setting information.

  As shown in FIG. 1, the floor heating remote controller 4 </ b> A is a driving operation for instructing on / off of the heating operation by the floor heating terminal 3 </ b> A to the display unit 41 including a liquid crystal display device and the control unit 38 of the heat source unit 2. The switch 42 (driving operation unit), the control mode switching operation switch 43 (control mode switching operation unit) for the floor heating terminal 3A, and up / down / left / right buttons for performing various settings of the heating operation by the floor heating terminal 3A. A setting operation unit 44 and a control unit (not shown) including a microcomputer and storage means are provided, and the control unit is communicatively connected to the control unit 38 of the heat source device 2. Since the other floor heating remote controller 4B has the same configuration, the same reference numerals are given and detailed description is omitted.

  The control unit of the remote controller 4A stores an operation state storage unit that stores whether the heating operation state is on or off, a control mode storage unit that stores the current operation control mode, and stores the heating intensity in a plurality of stages. Heating intensity storage means, residual heat utilization operation control mode duration storage means for storing the duration of remaining heat utilization operation control mode, timer operation information storage means, etc., and a timer for measuring the current time and various elapsed times The information stored in each storage means is configured to be transmitted to the control unit 38 of the heat source unit 2. Each storage means can be composed of different address areas in the same memory.

  Each time the operation switch 42 is pressed, the heating operation state stored in the operation state storage means is alternately set between the on state and the off state. In the control mode storage means, the normal operation mode is set when the heating operation state is turned on by the operation operation switch 42. After that, every time the control mode switching operation switch 43 is pressed, the residual heat utilization operation control mode and the normal operation mode are set. The mode is set alternately. In addition, a setting program for setting the heating intensity stored in the heating intensity storage unit by the operation of the setting operation unit 44, or the remaining heat utilization stored in the remaining heat utilization operation control mode duration storage unit by the operation of the setting operation unit 44 A setting program (remaining heat utilization operation time setting means) for setting the duration of the operation control mode is stored in the storage means of the control unit.

  Next, the control method of the heating operation by the floor heating terminal 3A will be described. The control method of the other floor heating terminal 3B is the same.

  When the operation switch 42 of the floor heating remote controller 4A is turned on, an operation start command signal is transmitted from the controller of the remote controller 4A to the controller 38 of the heat source unit 2, and the controller 38 for performing the heating operation by the floor heating terminal 3A. Is started in the normal operation control mode. In this normal operation control mode, the floor heating terminal 28b corresponding to the floor heating remote controller 4A is opened and the circulation pump 31 is operated, so that the floor heating terminal is connected from the expansion tank 30 of the heat source unit 2 via the low temperature heating outgoing line 28. While supplying the heating medium to 3A, the heating medium from the floor heating terminal 3A is returned to the heating return pipe 27. On the other hand, the combustion control of the burner 21a is also started, the heating heat medium flowing through the heat exchanger 21d is heated, and the temperature of the heating heat medium flowing out from the heat exchanger 21d to the high-temperature heating forward conduit 26 is about 80. The temperature is controlled to be ℃ (normal target temperature). When the operation of the high-temperature heating terminal 5 is stopped, all of the high-temperature heat medium flowing through the high-temperature heating outgoing pipe 26 is bypassed to the heating return pipe 27 via the bypass pipe 29 and returned from the floor heating terminal 3A. It is mixed with the incoming cold heat medium and returned to the expansion tank 30. The temperature of the low-temperature heat medium returned to the expansion tank 30 is determined by the ratio between the flow rate of the high-temperature heat medium flowing through the bypass line 29 and the flow rate of the heat medium returned from the floor heating terminal 3A, but is about 60 ° C. Designed to be Even in the normal operation control mode, when the temperature of the heat medium becomes too high or the temperature of the room where the floor heating terminal 3A is installed becomes too high, heating of the heat medium by the combustion device 21a is temporarily stopped. The circulation pump 31 can be temporarily stopped.

  When the user presses the control mode switching operation unit 43 during the heating operation of the floor heating terminal 3A, a control mode switching signal is transmitted from the control unit of the remote controller 4A to the control unit 38 of the heat source unit 2, and is controlled by the control unit 38. The mode is switched to the residual heat utilization operation control mode. In this residual heat utilization operation control mode, the control unit 38 does not perform the heating control of the heat medium based on the normal target temperature and prohibits the combustion of the combustion device 21a in principle.

  However, when the heating operation of the other floor heating terminal 3A or the high temperature heating terminal 5 is started, the heating medium heating control by the combustion device 21a for the heating operation of the other floor heating terminal 3A or the high temperature heating terminal 5 is performed. In addition, priority is given to the heat medium circulation control by the circulation pump 31, and the heat medium supply to the terminal 3A is prohibited by closing the heat valve 28b corresponding to the floor heating terminal 3A in the residual heat utilization operation control mode. A high temperature heating medium of about 80 ° C. is supplied to the high temperature heating terminal 5 via the high temperature outgoing path 26, and a low temperature heating medium of about 60 ° C. is supplied to the other floor heating terminals 3 B via the low temperature outgoing path 28. Is supplied. When the operation of the high temperature heating terminal 5 and the other floor heating terminal 3B is finished, the control unit 38 controls the high temperature heat medium remaining in the high temperature heating terminal 5 and the heat medium remaining in the low temperature heating terminal 3B. In order to perform heating in the floor heating terminal 3A using the residual heat, the floor heating terminal 3A corresponds to the thermal valve 5a of the high temperature heating terminal 5 and the thermal valve 28b corresponding to the other floor heating terminal 3B. The heat pump 28b is opened, and the circulation pump 31 is operated so as to circulate the heat medium remaining in these other terminals 5 and 3B to the floor heating terminal 3A. Further, when the temperature of the heat medium circulated to the floor heating terminal 3A becomes less than a predetermined temperature (for example, 40 ° C.), or the heat medium circulation continuation time to the floor heating terminal 3A exceeds a predetermined time (for example, 10 minutes). In this case, the temperature of the heat medium in the other terminals 5 and 3B is also averaged and the efficiency of the circulation is lowered, so that the heat valves 5a and 28b of these other terminals 5 and 3B are closed to stop the circulation. Can be configured.

  In one embodiment, while the residual heat utilization operation control mode is set, the control unit 38 is for the circulation pump 31 and / or the floor heating terminal 3A so as to always stop the circulation of the heat medium to the floor heating terminal 3A. The thermal valve 28b (heat medium circulating means) can be controlled. Also, instead of always stopping the heat medium circulation, the heat medium circulation to the floor heating terminal 3A is resumed by satisfying a predetermined circulation resumption condition after the heat medium circulation to the floor heating terminal 3A is stopped. The medium circulation means can also be controlled.

  In another embodiment, while the residual heat utilization operation control mode is set, the control unit 38 heats the circulation pump 31 and / or the floor heating terminal 3A so as to constantly circulate the heat medium to the floor heating terminal 3A. The valve 28b (heat medium circulating means) can also be controlled.

  In still another embodiment, while the residual heat utilization operation control mode is set, the circulation of the heat medium to the floor heating terminal 3A is continued until a predetermined circulation stop condition is satisfied. It is also possible to control the circulation pump 31 and / or the heat valve 28b (heat medium circulation means) for the floor heating terminal 3A so as to stop the circulation of the heat medium to the heating terminal 3B. In addition, the heat medium circulation means can be controlled to resume the heat medium circulation to the floor heating terminal 3A by stopping the heat medium circulation to the floor heating terminal 3A and satisfying a predetermined circulation resumption condition. .

  As the circulation stop condition, for example, the condition is that the temperature of the heat medium circulated to the floor heating terminal 3A, that is, the detected temperature of the heating low temperature thermistor 30a is lower than a predetermined temperature Tb (for example, 40 ° C.). it can. FIG. 3 is an example of a timing chart showing the relationship between the detected temperature of the heating low temperature thermistor 30a, the combustion control state of the burner 21a, and the control state of the thermal valve 28b for the floor heating terminal 3A in the residual heat utilization operation control mode. . Until the switching from the normal operation control mode to the residual heat utilization operation control mode, the detected temperature Ta of the heating low temperature thermistor 30a is substantially constant (about 60 ° C.), but when the residual heat utilization operation control mode is started (time t0) Since the combustion of the burner 21a is stopped, the detected temperature gradually decreases. Until the detected temperature reaches a predetermined temperature Tb, the heat pump 28b is opened and the circulation pump 31 is operated to circulate the heat medium between the heat source unit 2 and the floor heating terminal 3A, and the heat medium in the circulation pipe Heat the remaining heat effectively. When the detected temperature decreases to the predetermined temperature Tb (time t1), the advantage of the heat medium circulation is reduced, so the heat valve 28b is closed and the circulation pump 31 is stopped to stop the heat medium circulation to the floor heating terminal 3A. Let On the other hand, in the present embodiment, the operation of the heat source unit 2 is controlled such that the temperature of the heat medium circulated to the floor heating terminal 3A becomes the target temperature during the remaining heat operation in the range of the predetermined temperature Tb ± 10 ° C. When the detected temperature falls to a predetermined temperature Tb-10 ° C., the combustion of the burner 21a and the operation of the circulation pump 31 are started, the temperature of the heating medium in the heating circuit 22 in the heat source unit 2 is increased, and the heating low temperature thermistor 30a When the detected temperature reaches a predetermined temperature Tb + 10 ° C., the combustion of the burner 21a is stopped, the thermal valve 28a is opened, and the appropriately heated heat medium can be circulated to the floor heating terminal 3A.

  The residual heat utilization operation control mode is switched to the normal operation control mode by a user operation or is terminated by stopping the heating operation. More preferably, it can be configured to automatically switch to the normal operation control mode when a predetermined normal operation return condition is satisfied in the residual heat utilization operation control mode. The normal operation return condition can be, for example, a condition that the operation elapsed time in the residual heat utilization operation control mode exceeds a predetermined set time, and this predetermined time may be fixed, but the remote controller 4A It is preferable that it is set by a user operation by the remaining heat utilization operation time setting means. This set time can be set in a predetermined time unit, for example, a unit of 10 minutes, a unit of 30 minutes, or a unit of 1 hour.

  In addition, a room temperature sensor (not shown) may be provided in the remote controller 4A, and the normal operation return condition may be that the room temperature detected by the room temperature sensor has fallen below a predetermined lower limit temperature. This lower limit temperature can also be set by the user.

  The present invention is not limited to the above-described embodiment, and the design can be changed as appropriate. For example, the burner 21a may not be burned at all during the residual heat utilization operation control mode, and may be forcibly shifted to the normal control mode when the room temperature is lowered. Moreover, there may be only one heating terminal connected to the heat source machine.

2 Heat source machine 21a Burner (combustion device)
21d Primary heat exchanger 28b Thermally operated valve (heat medium circulating means)
31 Circulation pump (heat medium circulation means)
38 Control means 3A Floor heating terminal (first heating terminal)
3B floor heating terminal (second heating terminal)
4A Floor heating remote control (remote control for the first heating terminal)
42 Driving operation unit 43 Control mode switching operation unit 44 Setting operation unit

Claims (13)

A first heating terminal, a heat source machine, and a remote controller for the first heating terminal, the heat source machine heats the heating medium, and heat medium circulating means for circulating the heating medium to the first heating terminal. And a first temperature sensor for detecting the temperature of the heat medium heated by the combustion apparatus, and a control means for controlling the operation of the heat medium circulating means and the combustion apparatus, The remote control includes an operation operation unit for instructing the control means to turn on / off the heating operation by the first heating terminal, and the control means has a predetermined heating medium heated by a combustion device as a control mode. In the heating device having a normal operation control mode for controlling the heat medium circulating means and the combustion device so as to be the normal target temperature of
The remote control further includes a control mode switching operation unit for the first heating terminal separately from the driving operation unit,
The control means further includes, as a control mode, a residual heat utilization operation control mode in which heating control of the heat medium by the combustion device based on the normal target temperature is not performed, and the control mode switching operation unit performs the operation. A heating apparatus configured to switch between a normal operation control mode and a residual heat utilization operation control mode.   2. The heating device according to claim 1, further comprising a second heating terminal capable of circulating a heat medium by the heat medium circulation means, wherein the control means is provided in the second heating terminal in the residual heat utilization operation control mode. The heating apparatus characterized by controlling the said heat-medium circulation means so that the remaining heat medium is circulated to a 1st heating terminal.   The heating apparatus according to claim 2, wherein when the first heating terminal is operated in the residual heat utilization operation control mode, the controller starts the first heating operation by the second heating terminal. A heating apparatus characterized by controlling the operation of the heating medium circulating means and the combustion device so as to stop the circulation of the heating medium to the heating terminal and to circulate the heating medium at a predetermined temperature to the second heating terminal.   The heating device according to claim 2, wherein the control means supplies the heating terminal to each heating terminal according to the heat medium temperature and / or the heat medium circulation duration time circulated to the first heating terminal in the residual heat utilization operation control mode. A heating apparatus, wherein the heating medium circulating means is controlled to stop the circulation of the heating medium.   The heating device according to claim 1, wherein the control means continues circulating the heat medium to the first heating terminal until a predetermined circulation stop condition is satisfied in the residual heat utilization operation control mode, and the circulation stop condition The heating device is characterized by controlling the heat medium circulation means so as to stop the circulation of the heat medium to the first heating terminal when the condition is satisfied.   2. The heating device according to claim 1, wherein the control unit controls the heat medium circulation unit to stop the circulation of the heat medium to the first heating terminal in the remaining heat utilization operation control mode. Heating system.   The heating device according to claim 5 or 6, wherein the control means is configured to satisfy a predetermined circulation resumption condition after stopping circulation of the heat medium to the first heating terminal in the residual heat utilization operation control mode. The heating medium circulating means is controlled so as to resume the circulation of the heating medium to the heating terminal.   The heating apparatus according to claim 1, wherein the control unit controls the combustion apparatus so as to stop heating of the heat medium in a residual heat utilization operation control mode.   2. The heating device according to claim 1, wherein the control means is configured so that, in the residual heat utilization operation control mode, the temperature of the heat medium circulated to the first heating terminal becomes a predetermined residual heat operation target temperature. A heating device that controls the heat medium circulating means and the combustion device.   The heating device according to any one of claims 1 to 9, wherein the control means is configured to automatically switch to the normal operation control mode when a predetermined normal operation return condition is satisfied in the residual heat utilization operation control mode. Heating device characterized by being made.   11. The heating device according to claim 10, wherein the control means includes a timer, and the normal operation return condition includes that the elapsed operation time in the residual heat utilization operation control mode exceeds a predetermined set time. Heating device.   12. The heating apparatus according to claim 11, wherein the remote control includes a remaining heat utilization operation time setting means for setting the set time.   The heating apparatus according to any one of claims 10 to 12, wherein the remote control includes a room temperature sensor, and the normal operation return condition is that the room temperature detected by the room temperature sensor has dropped below a predetermined lower limit temperature. A heating device comprising:

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