JP2009180456A - Heating system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating system causing no deterioration of heating capacity even if heating control of a heater is stopped during a hot water non-demand period. <P>SOLUTION: In the heating system equipped with a heat source unit for heating, supplying a heating medium to a heating terminal in response to a hot water demand of a predetermined cycle, the heating control to the carburetor heater of the heating heat source unit is stopped when there is no heating medium demand from a heating terminal side. When a heating medium demand is received from the heating terminal side, the heating control of the carburetor heater is started from that point of time. In regard to a period from starting of the heating control until starting of combustion of a burner, an insufficient heating value is determined, predicted to have been applied to the heating medium on the assumption that combustion of the burner is started at the same time as receiving the heating medium demand, and combustion control of the burner is carried out by setting a new target temperature adding a portion of the insufficient heating value to a set target temperature of the heating medium. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heating system, and more particularly, to a heating terminal using a heat medium heated by a heating heat source device including a vaporization combustion type burner that vaporizes and burns liquid fuel in a vaporizer as a heat source for heating. The present invention relates to a heating system provided.

  FIG. 7 shows an example of this type of heating system. The heating system a shown in this figure is a heating system for floor heating, and is an oil vaporization combustion type hot water heating heat source machine b serving as a heating heat source machine, and supply of hot water as a heating medium from the hot water heating heat source machine. Floor heating panel c, which is a heating terminal that receives the heat, and the hot water heating heat source machine b and the floor heating panel c are connected via a circulation pipe e having a thermal valve d, and the hot water heating heat source machine b The generated warm water is circulated by a circulation pump f and supplied to the floor heating panel c so that floor heating can be performed.

  In addition, in the same figure, the code | symbol g shows the operation remote control of the floor heating panel c, and this operation remote control g is connected so that communication with the controller h of the hot water heating heat source machine b is possible. Further, symbol i indicates a vaporizer for vaporizing liquid fuel such as kerosene, and symbol j indicates a heater for heating the vaporizer i.

  By the way, in this kind of floor heating, when the operation switch is turned on in the operation remote controller g, hot water is supplied from the hot water heating heat source unit b to the floor heating panel c during all periods when the operation switch is in the ON state. Instead, according to the heating capacity (such as temperature control) set in the operation remote control g, the operation remote control g has a predetermined heating cycle (a warm water request period in which hot water is required and a hot water non-request period in which it is not required). A cycle) is set, and a hot water request is output from the operation remote controller g to the hot water heating heat source unit b for a necessary period of hot water according to the heating cycle.

  This hot water request is for requesting the supply of hot water at a predetermined temperature (for example, 60 ° C. in the case of the floor heating panel c) preset according to the type of the heating terminal, and according to the heating capacity selected by the operation remote controller g. A desired heating capacity can be obtained by expanding and contracting the period (time) of the hot water request.

  FIG. 8 shows an example of a timing chart showing the operation of such a heating system. When the operation switch is turned ON in the operation remote control g, an operation switch signal indicating that the operation switch signal is turned ON from the operation remote control g to the hot water heating heat source unit b in accordance with the operation (FIG. 8A). (See FIG. 8 (b)) for transmitting a hot water request according to a predetermined heating cycle from the time when the operation switch signal is turned ON. At that time, a signal indicating the required hot water temperature (60 ° C. in the illustrated example) corresponding to the type of the heating terminal is also given to the hot water heating heat source unit b (see FIG. 8C).

  Thus, when the various signals are given to the hot water heating heat source unit b, the controller h of the hot water heating heat source unit b first starts the heating control of the heater j from the time when the operation switch signal is turned ON. That is, in order to burn the burner in this kind of oil vaporization combustion type hot water heating heat source b, the vaporizer i must be heated up to a combustible temperature, so that the operation switch is in the ON state. The heating control of the heater j is always performed (control for intermittently heating the heater j in order to keep the temperature of the vaporizer i in a certain range) (see FIG. 8D).

  If the temperature of the vaporizer i is lower than the combustible temperature when the heating control of the heater j is started, the period until the vaporizer i reaches the combustible temperature as shown in FIG. 8 (g). For t, the burner is in a state incapable of combustion, and combustion control by the controller h from the time when the temperature of the vaporizer i rises to the combustible temperature (combustion with the required hot water temperature as the target temperature of hot water supplied to the floor heating panel c). Control) is executed.

  At that time, in parallel with the above-described heating control of the heater j, the controller h also performs operation control of the circulation pump f and opening / closing control of the thermal valve d in response to a request for hot water from the operation remote controller g (FIG. 8 ( e) and (f)). That is, when there is a request for hot water (during the hot water request period), the controller h operates the circulation pump f and opens the thermal valve d so that hot water is supplied to the floor heating panel c. When there is no request (during the hot water non-request period), the operation of the circulation pump f is stopped and the thermal valve d is closed to stop the supply of hot water to the floor heating panel c.

Thus, in the conventional heating system, while the operation switch is turned ON with the operation remote controller g, the heating control of the heater j is continued, and hot water at a predetermined temperature is intermittently supplied according to a predetermined heating cycle. By supplying to the floor heating panel c, it was configured to perform heating with a desired heating capacity.
JP 2003-336902 A

  However, such a conventional configuration has the following problems, and improvements have been desired.

  That is, in the conventional heating system, since the heating control of the heater j is always continued during the period when the operation switch is ON with the operation remote controller g, no hot water is required to stop the burner combustion. During the period (specifically, during the period indicated by the symbol T in FIG. 4D), the heating control of the heater j is continued, so that the power consumption by the heater j is large and the running cost is increased. .

  In this regard, it is conceivable that the heating control of the heater j is stopped during the hot water non-request period (that is, the heating control is stopped for the period indicated by the symbol T in FIG. 4D). If the temperature of the vaporizer i becomes lower than the combustible temperature while the control is stopped, the burner cannot be immediately burned when the next hot water request is received, and until the preheating of the burner is completed for the hot water request period. There is a problem that the desired heating capacity cannot be obtained because the combustible period is insufficient by the period T1.

  The present invention has been made in view of such problems, and the object of the present invention is to provide a heating system that does not cause a decrease in heating capacity even if heating control of the heater is stopped during a period when no hot water is required. The main purpose is to provide

  In order to achieve the above object, a heating system according to claim 1 of the present invention includes a vaporization combustion type heating heat source unit having a burner and a fuel vaporizer, and heating by receiving a supply of a heat medium from the heating heat source unit. And a heating terminal communicably connected to the heating heat source machine, the heating heat source machine being given from the heating terminal side according to a predetermined heating cycle comprising a heat medium request period and a heat medium non-request period In the heating system configured to intermittently supply the heating medium to the heating terminal in response to the heating medium request, the control unit of the heating heat source unit performs the vaporization when there is no heating medium request from the heating terminal side. The heating control of the heater is not performed, and the heating control of the heater is started from the time when the heating medium request is received from the heating terminal side, and the burner starts to burn from the start of the heating control to the heater. Assuming that the burner was burned at the time when the heat medium request was received, the amount of insufficient heat that was predicted to have been given to the heat medium during this time was determined, and the target temperature of the heat medium set in the heat medium request was calculated above. The burner combustion control is performed by setting a new target temperature to which the amount of insufficient heat is added.

  That is, in the heating system according to the first aspect, the control means of the heating heat source unit is configured such that the heating terminal side (heating) even when the heating terminal is in the operation mode (that is, the operation switch of the heating terminal is turned on). It is configured not to perform heating control (energization heating) of the heater of the vaporizer when there is no heat medium request from the terminal remote controller or other devices arranged between the remote controller and the heating heat source. Is done. for that reason. In the present invention, when there is no heat medium request from the heating terminal side (that is, during the heat medium non-request period in which the supply of heat medium to the heating terminal is not required), the heater does not consume power. Power consumption is less than conventional products that perform

  And when there is a heat medium request from the heating terminal side, the control means of the heating heat source machine starts heating control (energization heating) to the heater from the time when the heat medium request is received. If the carburetor is less than the combustible temperature at this time, the burner cannot combust until the temperature is raised to the combustible temperature, resulting in a shortage of heat. In the present invention, during this period (that is, heating control to the heater) It is configured to compensate for the shortage of heat from the start time to the start of combustion of the burner as follows.

  That is, first, the control unit of the heating heat source machine obtains a shortage of heat that is predicted to have been given to the heating medium during this period if it is assumed that the burner has been burned when the heating medium request is received. This insufficient heat quantity is a value that can assume the quantity of heat that could not be supplied before the burner started combustion, for example, a value obtained by subtracting the current temperature of the heating medium from the target temperature of the heating medium. A value obtained by multiplying the time (preheating time) required for heating up to a combustible temperature is used. Then, after the burner starts combustion, the control unit of the heating heat source unit adds the above shortage amount of heat to the target temperature of the heat medium (required heat medium temperature) set in the heat medium request from the heating terminal side. The new target temperature is set and burner combustion control is performed. That is, the combustion control is executed by setting a new target temperature so as to add the amount of insufficient heat to the target temperature of the heat medium set according to the heating terminal. Therefore, in the heating system according to claim 1, even when the heating control to the heater is started at the time when the heating medium is requested from the heating terminal side, the heating medium does not fall short of the heat amount, and a desired heating is performed in the heating terminal. Ability can be gained.

  The heating system according to claim 2 of the present invention is the heating system according to claim 1, wherein the newly set target temperature of the heating medium is within the heating medium request period when the burner starts combustion. The heat quantity corresponding to the insufficient heat quantity is set so as to be given to the heat medium.

  That is, in the heating system according to claim 2, when setting the new target temperature of the heat medium by the control means of the heating heat source machine, it corresponds to the amount of insufficient heat within the heat medium request period when the burner starts combustion. Since the amount of heat to be generated is set to be given to the heat medium, the heat amount for the insufficient heat amount can be supplied within one heating cycle (specifically, one heat medium request period). Therefore, the control means of the heating heat source machine can perform the operation / stop of the circulation pump and the opening / closing control of the thermal valve according to the heating cycle as in the conventional case. Therefore, according to the heating system which concerns on Claim 2, this invention can be applied, suppressing the change of the control program in the control means of a heating heat source machine to the minimum.

  Moreover, the heating system which concerns on Claim 3 of this invention is the heating system of Claim 1. WHEREIN: The target temperature of the said newly set heating medium is preset as a regulation value, It is characterized by the above-mentioned.

  That is, in the heating system according to the third aspect, since the new target temperature set by the control means of the heating heat source machine is a specified value, for example, the heating medium that can set the target temperature of the heat medium in several stages. In the case of a heat source machine, a target temperature that is one step or several steps higher than the original target temperature can be used as the new target temperature. Specifically, the heating medium can be supplied to a high-temperature terminal that requires a high-temperature (for example, 80 ° C.) heating medium as a heating terminal and a low-temperature terminal that requires a lower-temperature (for example, 60 ° C.) heating medium. In a heating heat source machine (having high and low two-step target temperatures for heating as a specified value), the target temperature for the high temperature terminal can be used as the new target temperature of the heating system on the low temperature terminal side. Therefore, according to the heating system according to the third aspect, it is possible to easily set a new target temperature.

  The new target temperature may be determined by another method as long as it is higher than the initial target temperature, and is determined as a final target temperature value (for example, 80 ° C.). In addition, it is also possible to set a temperature increase range (for example, + 10 ° C.) with respect to the initial target temperature.

  A heating system according to a fourth aspect of the present invention is the heating system according to the third aspect, wherein within the heating medium request period when the burner starts to burn depending on the newly set target temperature of the heating medium. When the amount of heat corresponding to the amount of insufficient heat is not given to the heat medium, the amount of heat corresponding to the amount of insufficient heat is given to the heat medium even in the heat medium non-request period that is continuous with the heat medium request period. It is characterized by continuing combustion control until.

  That is, when the new target temperature set by the control means of the heating heat source machine is set to the specified value as in the heating system according to claim 3, the amount of insufficient heat is reduced within the heat medium request period when the burner starts combustion. There may be a case where the amount of heat corresponding to is not given to the heat medium. The heating system according to claim 4 gives the heat medium the amount of heat that could not be given within the heat medium request period by continuing the combustion control even in the heat medium non-request period that follows the heat medium request period. In this case, with the extension of the execution period of the combustion control, the control means of the heating heat source unit is configured to continue the operation of the circulation pump and the open state of the thermal valve during burner combustion.

  Moreover, the heating system which concerns on Claim 5 of this invention is a heating system in any one of Claim 1 to 4. If the control means of the said heating-heat-source machine starts the heating control of the said heater, it will be a vaporizer. The temperature detected by the vaporizer temperature detecting means for detecting the temperature is monitored, and when the temperature rise of the vaporizer exceeds a predetermined ratio, the heating control of the heater is stopped.

  That is, when the heating heat source unit starts combustion control by a heating medium request from the heating terminal side, the carburetor is heated by the heat generated by the burner combustion, and the temperature of the carburetor naturally rises regardless of the heater. For this reason, in the invention according to claim 5, the detected value of the vaporizer temperature detecting means is monitored, and when the rate of temperature rise exceeds a predetermined rate, heating may be stopped in the heating control of the heater. Even if the upper limit temperature is not reached, the heating control of the heater is stopped in anticipation of the heating / heating temperature of the vaporizer caused by the burner flame. Thereby, the heating control of the heater can be stopped early, and the power consumption of the heater can be reduced accordingly.

  Moreover, the heating system which concerns on Claim 6 of this invention is a heating system in any one of Claim 1 to 5. WHEREIN: The control means of the said heating-heat-source machine is a flame current of a burner during the heating control of the said heater. The detection value of the flame current detection means to be detected is monitored, and when the flame current is within a predetermined range, the heating control of the heater is stopped.

  That is, in the heating system according to claim 6, if the burner burns normally, the carburetor is heated and heated by the heat of combustion, whereas if the burner is not normal, the carburetor is sufficiently heated and raised. The heater is controlled using the property that it is not heated. During burner combustion, whether the burner is normally burned based on the detection value by the flame current detection means (the flame current is within a predetermined range). If it is burning normally, the heating control of the heater is stopped. That is, in this case, even if the temperature of the vaporizer is not raised to a temperature that is a condition for stopping the heating control of the heater, the heating control of the heater is stopped, so that the power consumption of the heater can be reduced accordingly. It becomes like this.

  Moreover, the heating system which concerns on Claim 7 of this invention is a heating system in any one of Claim 1-6. WHEREIN: The control means of the said heating-heat-source machine is from the said heating terminal side in the combustion control of the said burner. The heater is configured to stop the heating control of the heater when the burner stops combustion even during the period when the heating medium request is received, and the heat for detecting the temperature of the heating medium after the heating control of the heater is stopped. The detection value of the medium temperature detecting means is monitored, and when the temperature of the heat medium satisfies a predetermined temperature lowering condition, the heating control of the heater is started.

  That is, in the burner combustion control during the period when the heating medium request is received from the heating terminal side, the temperature of the heating medium is maintained within a predetermined temperature range (target temperature ± several degree range) with respect to the target temperature. In this way, the burner can be configured to burn intermittently during this time. Therefore, in the heating system according to the seventh aspect, when the burner stops combustion in such combustion control, the heating control of the heater is stopped accordingly to reduce power consumption in the heater. Then, the heating control of the heater can be started before the combustion of the burner is started when the temperature of the heat medium reaches the lower limit value of the predetermined temperature range set with respect to the target temperature (that is, The temperature of the heat medium is monitored (so that a preheat period of the vaporizer can be secured before the burner starts burning), and heating control of the heater is started when the temperature of the heat medium satisfies a predetermined temperature decrease condition. Thereby, when the temperature of the heat medium reaches the lower limit value of the predetermined temperature range set with respect to the target temperature, combustion of the burner can be started immediately, and the heating capability of the heating terminal can be ensured. .

  According to the first to fourth aspects of the present invention, when there is no heat medium request from the heating terminal side, the heating control of the heater of the carburetor is not performed. The energization time to the heater can be reduced as compared with the conventional product that performs heating control, and the power consumption in the heater can be reduced. Moreover, when there is a heat medium request from the heating terminal side, if the vaporizer is below the combustible temperature, the shortage of heat from the start of heating control to the heater to the start of combustion of the burner will be compensated In addition, since the heating heat source machine is operated with the target temperature of the heat medium being raised, the heat medium does not fall short of the amount of heat, and a desired heating capacity can be obtained at the heating terminal.

  Further, according to the inventions of claims 5 to 7, in addition to when there is no heat medium request, the heating control of the heater is stopped if a certain condition is satisfied even when there is a heat medium request. The power consumption in the heater can be reduced.

Embodiment 1
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an example of a schematic configuration of a heating system to which the present invention is applied. The illustrated heating system 1 uses a hot water heating heat source machine (heating heat source machine) 2 that generates hot water as a heating medium and heating water (heat medium) generated by the hot water heating heat source machine 2. As a heating terminal that performs heating, a high-temperature heating terminal device (not shown in detail, for example, a heating device such as a fan convector) 3 that receives a supply of high-temperature (for example, 80 ° C.) hot water from the hot-water heating heat source unit 2 and hot water A low-temperature heating terminal device (floor heating device 4 in the illustrated example) that receives supply of low-temperature (for example, 60 ° C.) hot water from the heating heat source unit 2 is provided as a main part.

  The said hot water heating heat source machine 2 is comprised with the combustion apparatus provided with the controller (control means) 10 which controls each part of this hot water heating heat source machine 2, and the well-known aspect which produces | generates the warm water circulated between the said heating terminals The heat exchanger 5 and a burner 6 for heating the heat exchanger 5 are provided.

  The burner 6 is constituted by a so-called vaporization burner that vaporizes and burns liquid fuel such as kerosene. The burner 6 includes a vaporizer 61 for vaporizing the liquid fuel, and the vaporizer 61. An electric heater (heater) 62 for heating and raising the temperature is provided. That is, the burner 6 is in a state where the liquid fuel can be combusted (that is, in a vaporized state) by heating and raising the temperature of the vaporizer 61 to a predetermined combustible temperature. As a result, the electric heater 62 generates heat and the vaporizer 61 is heated. The energization of the electric heater 62 is controlled by the controller 10 (details will be described later).

  In the figure, reference numeral 63 denotes a burner nozzle. By igniting the liquid fuel vaporized by the vaporizer 61, a flame is formed in the burner nozzle 63, and the heat exchanger 5 is heated.

  The burner 6 thus configured is configured such that its controller 10 can control its combustion / stop and combustion capability. The burner 6 is provided with an ignition device (not shown), and a flame rod (flame current detecting means) 64 for detecting a flame formed in the burner nozzle 63, and the flame flowing through the flame rod 64. The current value of the current can be detected and monitored by the controller 10.

  In the figure, reference numeral 7 denotes a combustion fan for sending combustion air to the burner 6, and reference numeral 8 denotes a fuel supply pipe for supplying liquid fuel to the carburetor 61.

  And as above-mentioned, the hot water heating heat source machine 2 shown in this embodiment is hot water of high temperature and low temperature with respect to two types of heating terminals, the high temperature heating terminal device 3 and the low temperature heating terminal device (floor heating device 4), respectively. An internal high-temperature forward pipe 12 for supplying high-temperature hot water to the high-temperature heating terminal device 3 as a circulation pipe for supplying hot water to these heating terminals, and a low-temperature heating terminal device The internal low-temperature forward pipe 13 for supplying low-temperature hot water to the floor heating device 4, and the high-temperature heating terminal device 3 and the floor heating device 4 for taking in the hot water that is radiated and returned to the heat exchanger 5 again Internal return pipe 14.

  Specifically, the internal high-temperature forward pipe 12 has one end connected to one end (hot water discharge side) of the heat exchanger 5 and the other end provided outside the hot water heating heat source unit 2. The pipe 20 is connected to a hot water inlet (not shown) of the high temperature heating terminal device 3. And one end of the hot water return port (not shown) of the high temperature heating terminal device 3 is connected to the other end (hot water return side) of the heat exchanger 5 through an external return pipe 21 provided outside the hot water heating heat source unit 2. The other end of the connected internal return pipe 14 is connected.

  The internal return pipe 14 is provided with a circulation pump 17 which can be controlled to be operated / stopped by a controller 10 which will be described later. By operating the circulation pump 17, hot water output from the heat exchanger 5 is provided. However, it is configured to be able to circulate to the heat exchanger 5 via the internal high temperature forward pipe 12, the external high temperature forward pipe 20, the high temperature heating terminal device 3, the external return pipe 21, and the internal return pipe 14.

  One internal low-temperature forward pipe 13 is provided with a thermal valve 18 that can be controlled to be opened and closed by a controller 10 to be described later, one end of which is connected to the internal return pipe 14 on the downstream side (discharge side) of the circulation pump 17. In addition, the other end is connected to a hot water inlet (not shown) of the floor heating panel 41 via an external low-temperature forward pipe 22 provided outside the hot water heating heat source unit 2. A hot water return port (not shown) is connected to the external return pipe 21 via an external low temperature return pipe 23. A bypass pipe 16 that connects the internal high-temperature forward pipe 12 and the internal return pipe 14 is disposed on the upstream side (suction side) of the circulation pump 17. The bypass pipe 16 also includes the controller 10. A thermally operated valve 19 that can be controlled by the above is provided.

  And the circulation of the hot water to the floor heating panel 41 is performed when the high temperature heating terminal device 3 is in a stopped state (a heat valve on the high temperature heating terminal device 3 side (not shown) is closed and the hot water to the high temperature heating terminal device 3 is closed). When there is no supply), the hot water output from the heat exchanger 5 passes through the internal high temperature forward pipe 12, the bypass pipe 16, and the circulation pump 17 to the internal low temperature forward pipe 13, the floor heating panel 41, the external low temperature return pipe 23, It is possible to circulate in the external return pipe 21 and the internal return pipe 14 (in the internal return pipe 14 merging with the hot water from the bypass pipe 16, partly circulating in the internal low temperature forward pipe 13 and the remainder to the heat exchanger 5). It is configured.

  On the other hand, when the high-temperature heating terminal device 3 is in an operating state (when a heat valve on the high-temperature heating terminal device 3 (not shown) is opened and hot water is supplied to the high-temperature heating terminal device 3), In addition to the circulation of the warm water, the warm water radiated by the high temperature heating terminal device 3 joins the warm water from the external low temperature return pipe 23 in the external return pipe 21 and circulates to the internal return pipe 14.

  The controller 10 is a control device that constitutes the control means of the hot water heating heat source machine 2, and is configured to include a known microcomputer having a CPU, ROM, RAM, etc., and is stored in a storage means such as ROM, RAM, etc. It is comprised so that each part of the hot water heating heat source machine 2 may be controlled based on the control program and control data.

  Specifically, the controller 10 includes a high temperature forward temperature sensor 25 that detects the temperature of hot water in the high temperature forward pipe 12, a low temperature forward temperature sensor 26 that detects the temperature of hot water in the low temperature forward pipe 13, and the temperature of the vaporizer 61. Various sensors such as the carburetor temperature sensor 27 for detecting the above, and the above-described frame rod 64 are connected, and information detected by these sensors can be taken into the controller 10, and an ignition device (not shown) The circulation pump 17, the thermal valves 18 and 19, the electric heater 62, and the like are also connected, and the operation of each of these parts can be controlled.

  Further, this controller 10 is also communicably connected to a controller 43 of an operation remote controller 42 of the floor heating device 4 to be described later, and receives various signals from the controller 43 to control the supply of hot water to the floor heating panel 41. Is configured to do.

  Here, the operation remote controller 42 of the floor heating device 4 is a remote controller of the type installed on the wall surface of the living room, and the specific configuration is well known, and detailed description thereof is omitted, but the operation remote controller 42 is omitted. Is provided with a controller 43 having a microcomputer, which is configured to transmit various signals to the controller 10 of the hot water heating heat source unit 2 in response to an operation of an operation switch (not shown). More specifically, the hot water heating heat source machine 2 according to a heating cycle determined in accordance with an operation switch signal indicating ON / OFF of an operation switch of the operation remote controller 42 or a heating capacity set in a heating temperature adjustment (temperature control) switch. For example, a warm water request signal for requesting warm water (heating medium) for heating is transmitted.

  Thus, in the heating system configured as described above, when only the high-temperature heating terminal device 3 is operated, the controller 10 closes the thermal valves 18 and 19 and operates the circulation pump 17. The detected temperature THs of the sensor 25 becomes the temperature of the hot water required by the high temperature heating terminal device 3 (high temperature side set temperature TH) (specifically, the detected temperature THs is set to the high temperature side set temperature TH ± x ° C. ( For example, the combustion control of the burner 6 is performed so as to be in the range of x = 5 ° C.). In other words, when only the high temperature heating terminal device 3 operates, the controller 10 performs combustion control of the burner 6 with the high temperature side set temperature TH as the target temperature of circulating water to the high temperature heating terminal device 3.

  When both the high temperature heating terminal device 3 and the floor heating device 4 are operated, the controller 10 opens the thermal valve 18 to open the hot water circulation path to the floor heating panel 41 and operates the circulation pump 17. The combustion control of the burner 6 is performed in the same manner as described above so that the temperature THs detected by the high temperature going-out temperature sensor 25 becomes the high temperature side set temperature TH. That is, also in this case, the combustion control of the burner 6 is performed with the high temperature side set temperature TH as the target temperature. Further, the controller 10 further determines the temperature of the hot water supplied to the floor heating panel 41 (that is, the detection temperature TLs detected by the low temperature going-out temperature sensor 26) on the floor heating device side (low temperature side set temperature TL). (In this case as well, specifically, the detected temperature TLs is within the range of the low temperature side set temperature TL ± x ° C. (for example, x = 5 ° C.)) Hot water flowing through the high-temperature forward pipe 12 and hot water flowing through the internal return pipe 14 are mixed to supply hot water to the floor heating panel 41. At that time, the controller 10 opens and closes the thermal valve 18 in response to the hot water request signal given from the operation remote controller 42 of the floor heating device 4, and intermittently supplies hot water to the floor heating panel 41. The temperature of the heating panel 41 is adjusted.

  On the other hand, when only the floor heating device 4 is operated, the controller 10 opens the thermal valve 18 to open the hot water path to the floor heating panel 41 and keeps the thermal valve 19 open, and the circulation pump 17 is further operated so that the detected temperature TLs detected by the low-temperature going-out temperature sensor 26 becomes the low-temperature side set temperature TL (in this case also, specifically, the detected temperature TLs is set to the low-temperature side set temperature TL ± x ° C. (for example, Combustion control of the burner 6 is performed so that the range of x = 5 ° C.). In other words, when only the floor heating device 4 is operated, the controller 10 performs combustion control of the burner 6 using the low temperature side set temperature TL as the target temperature of circulating water to the floor heating panel 41. At this time, the thermal valve on the high temperature heating terminal device 3 side is closed. The controller 10 is similar to the above in that it adjusts the heat radiation temperature of the floor heating panel 41 by opening and closing the thermal valve 18 in response to a hot water request signal from the operation remote controller 42 of the floor heating device 4.

  Then, next, the heating control of the electric heater 62 and the combustion control of the burner 6 which heat the vaporizer 61 in the heating system configured as described above will be described in detail with reference to FIGS. In addition, in the following description, the case where only the floor heating apparatus 4 is drive | operated is demonstrated for convenience (this is the same also about Embodiment 2 or later).

  FIG. 2 is a timing chart of various signals when only floor heating is performed and the operation of each part of the hot water heating heat source unit 2. First, the main points of the present invention will be described based on FIG.

  When the operation switch is turned on in the operation remote controller 42 of the floor heating device 4, the operation switch signal indicating the operation switch ON in accordance with this operation and the heating determined according to the heating capacity set by the operation remote controller 42. A hot water request signal in accordance with the cycle (a signal indicating “warm water request” during the hot water request period and “no hot water request” during the hot water non-request period) is provided to the controller 10 of the hot water heating heat source unit 2 (FIG. 2). (See (a) and (b)). Further, since the floor heating device 4 is a low temperature heating terminal device, this hot water request signal is accepted by the controller 10 as requesting hot water of the low temperature side set temperature TL (60 ° C. hot water in the illustrated example) (FIG. 2 ( c)).

When the controller 10 receives the operation switch signal (operation switch ON) and the hot water request signal (with a hot water request) (see the time point t ₀ in FIG. 2), the controller 10 starts the heating operation in accordance with the period during which the hot water is requested ( (See FIG. 2 (e)). That is, the circulating pump 17 is operated and the thermal valve 18 is opened to circulate the hot water through the floor heating panel 41 so that the hot water is supplied to the floor heating panel 41 in accordance with a period when there is a hot water request (FIG. 2 ( see g)). And the heating control of the electric heater 62 is started (refer FIG.2 (d)), and the combustion control of the burner 6 is performed.

  Here, the heating control of the electric heater 62 controls the energization to the electric heater 62 so that the detected temperature Ta of the vaporizer temperature sensor 27 becomes a predetermined combustible temperature. When the detected temperature Ta is lower than the combustible temperature, the energization is continued and the electric heater 62 so that Ta is maintained within the range from the combustible temperature to the combustible temperature + y ° C. (y is appropriately set). When the temperature rises above the combustible temperature, the electric heater 62 is energized intermittently so as to keep the vaporizer 61 so as not to exceed the range of combustible temperature to combustible temperature + y ° C.

Incidentally, vaporization or when the operation switch signal has just the time point when ON (time point t ₀ in FIG. 2), operation switch of the high-temperature heating terminal device 3 or when the floor heating device in operation 4 is OFF Since the temperature Ta detected by the carburetor temperature sensor 27 is less than the combustible temperature except when the combustor 61 is at the combustible temperature, the preheating period T1 until the vaporizer 61 is heated to the combustible temperature. (Between t ₀ and t _{1 in} FIG. 2) is necessary, and during this time, the burner 6 cannot burn, and the amount of heat that is planned for the circulating water to the floor heating panel 41 (if the burner 6 is burning during this time, it is circulated) The amount of heat of the circulating water (heat medium) is insufficient.

  Therefore, in the present invention, the controller 10 predicts the amount of heat that has not been given to the circulating water during the preheating period T1, and predicts this with respect to the initially set target temperature of the circulating water (low temperature side set temperature TL). A new target temperature is set by adding (adding) the amount of heat (hereinafter referred to as “insufficient heat A”), and the combustion control of the burner 6 is performed based on this new target temperature.

  That is, in the present embodiment, in setting the new target temperature, a predetermined value z (for example, 20 ° C.) is added to the initial target temperature (low temperature side set temperature TL) to obtain a new target temperature. That is, since the initial target temperature is 60 ° C., 80 ° C. obtained by adding 20 ° C., which is the specified value z, is set as a new target temperature. Then, the combustion control of the burner 6 is performed at the new target temperature, and when the heat quantity corresponding to the insufficient heat quantity A is given to the circulating water by the additional amount z of the target temperature, the target temperature is set to the initial target temperature of 60 ° C. It has been made to return.

Specifically, the controller 10 in the present embodiment, as shown in FIG. 2 (h), between t ₀ is a preheating period T1 of t _1, the initial target temperature every second (low-temperature side set temperature TL ) And the temperature of the circulating water (the detected temperature TLs of the low-temperature forward temperature sensor 26) is integrated to determine the insufficient heat amount A. When the preheating of the vaporizer 61 is completed (at time t ₁ ), the target temperature of the circulating water is reset to a new target temperature (80 ° C.) (see FIG. 2 (i)), and the burner 6 At the same time as the combustion of the burner 6 (preheating of the carburetor 61 is completed), this time, a process of subtracting the additional amount z (20 ° C.) every second from the insufficient heat amount A obtained by the integration. Starting, when the result of this subtraction becomes “0”, the target temperature is returned to the original target temperature (60 ° C.) at that time (time t ₂ ). In the illustrated example, at the time when the target temperature is returned to the initial target temperature (60 ° C.) (at time t ₂ ), the state where there is still a request for hot water continues, so there is no request for hot water ( Combustion control is performed at the initial target temperature (60 ° C.) until time t ₃ .

  As described above, in the present invention, even when the combustion of the burner 6 cannot be started at the timing when the hot water is requested by the preheating period T1 of the vaporizer 61, the target temperature is increased to compensate for the shortage of heat due to the preheating period T1. Since the operation is performed, the floor heating device 4 does not fall short of heat.

And by employ | adopting such combustion control, in the heating system which concerns on this invention, as shown in FIG.2 (d), even when the operation switch of the floor heating apparatus 4 is an ON state, as shown in FIG. The heating control of the electric heater 62 can be stopped during the hot water non-request period (the period from t ₃ to t _{4 in} FIG. 2) where there is no hot water request. That is, if the combustion of the burner 6 is stopped during the period when there is no request for hot water and the heating control of the electric heater 62 is stopped during this period, there may occur a situation where the carburetor 61 falls below the combustible temperature. Since combustion control is performed by adding the target temperature so as to compensate for the shortage of heat due to the preheating period of the heater 61, the energization of the electric heater 62 can be cut without the floor heating device 4 falling short of heat.

Incidentally, this connection shown in FIG. 2 (e), described heating operation of the heating period the second round of warm water required period (t ₆ from t ₄ of Figure 2). Here are you shown, no amount of heat corresponding to the insufficient amount of heat A fraction within (period t ₆ from t ₄ in FIG. 2) the hot water required period for preheating period T2 becomes longer given to the circulating water Shows the case. That is, in this case, the end of the hot water demand period (time point t _6), not yet heat of schedule to the plus fraction circulating water does not become subtraction value is "0" and z are given. Therefore, the controller 10, even if the hot water not required period (t ₇ from t ₆ in FIG. 2) that is continuous with the hot water demand periods, all amount of heat corresponding to the missing heat quantity A Min gives the circulating water The combustion control at the new target temperature (80 ° C.) is continued until That is, the heating operation is continued until the subtraction value becomes “0”, and accordingly, the operation of the circulation pump 17 and the state where the thermal valve 18 is opened are continued, and the heating of the electric heater 62 is further continued. Control continues. Then, the heating operation is stopped when the subtraction value becomes “0”.

  In this way, if the amount of heat corresponding to the above insufficient heat amount A is not given to the circulating water within the hot water request period, the heating operation is continued even during the hot water non-request period, so the floor heating device 4 is short of heat. It is avoided to fall into.

  In the above-described embodiment, the case where the controller 10 obtains the insufficient heat amount A is shown. However, the insufficient heat amount A is the initial target temperature, the low temperature side set temperature TL, and the circulation during the preheating period. In addition to multiplying the temperature difference of the water temperature (detected temperature TLs of the low temperature going temperature sensor 26) by the time required for the preheating period (seconds), it can be obtained by such calculation.

  In the above-described embodiment, the case where the specified target temperature of 20 ° C. is added to the initial target temperature as the newly set target temperature has been shown. However, the newly set target temperature is the insufficient heat amount A. It can also be configured to set appropriately according to the size of the. In that case, the newly set target temperature may be set so that the amount of heat corresponding to the insufficient heat amount A is given to the circulating water within the hot water request period when the burner 6 starts combustion. preferable. That is, it is preferable to set a new target temperature so that the heating operation is not required during the hot water non-request period.

  Next, the control procedure of the controller 10 when only floor heating is performed will be described with reference to FIG.

  As shown in FIG. 3, when receiving an operation switch signal indicating that the operation switch is turned ON from the operation remote controller 42 of the floor heating device 4, the controller 10 first determines whether there is a hot water request from the operation remote controller 42. Is determined (see step S1 in FIG. 3). And when there exists a hot water request | requirement, while operating the circulation pump 17, the thermal valve 18 is opened (FIG. 3, step S2, S3), and the hot water circulation to the floor heating panel 41 is started.

  And according to these processes, the controller 10 starts the heating control of the electric heater 62. At that time, first, it is determined whether the preheating of the vaporizer 61 is completed based on the detected temperature Ta of the vaporizer temperature sensor 27 (see step S4 in FIG. 3). At this time, since the preheating is not normally completed except when the high-temperature heating terminal device 3 is in operation or the like, the controller 10 proceeds to step S15 in FIG. 3 and the temperature of the circulating water (low temperature forward temperature sensor 26). It is determined whether the detected temperature TLs) is lower than the required hot water temperature of the floor heating device 4 (low temperature side set temperature TL).

  When the detected temperature TLs of the low-temperature going-out temperature sensor 26 is higher than the low-temperature side set temperature TL in the determination at step S15 in FIG. 3 (when the determination at step S15 is negative), the floor heating panel 41 is set to the low-temperature side. Since the hot water having the temperature TL can be immediately supplied, the controller 10 turns on only the electric heater 62 without burning the burner 6 (that is, starts energizing the electric heater 62). At this time, the electric heater 62 is energized continuously until the vaporizer 61 is heated to a combustible temperature.

  On the other hand, when the detected temperature TLs of the low temperature going temperature sensor 26 is lower than the low temperature side set temperature TL (when the determination in step S15 is affirmative), the burner 6 needs to be burned, so the controller 10 Starts the accumulation of the insufficient heat amount A for the preheating period until the preheating of the vaporizer 61 is completed (in other words, until the burner 6 starts combustion) (see step S16 in FIG. 3). Then, heating control for the purpose of raising the temperature of the electric heater 62 is started (see step S17 in FIG. 3).

  When energization of the electric heater 62 is started in this way, the controller 10 next determines whether or not there is a request for hot water, as shown in step S9 of FIG. It is rare that the heating request is made immediately after the preheating of the vaporizer 61 is started, and usually this determination is negative, so the process returns to step S4 in FIG. 3 again. If it is determined in step S4 in FIG. 3 that preheating of the carburetor 61 has been completed, it is next determined whether or not the insufficient heat amount A integrated in step S16 in FIG. 3 is “0” (step in FIG. 3). (See S5).

  At this time, the case where the insufficient heat amount A is “0” means that when the operation switch of the controller 10 is turned ON, the carburetor 61 has already been heated to a combustible temperature or higher (that is, preheating has been completed). In this case, the process proceeds to step S18 in FIG. 3 and the combustion control is performed so that the detected temperature TLs of the low temperature forward temperature sensor 26 becomes the low temperature side set temperature TL (that is, the original target temperature remains unchanged). Be started.

  On the other hand, when the insufficient heat amount A is not “0”, the controller 10 adds the heat amount corresponding to the insufficient heat amount A to the low temperature side set temperature TL, which is the initial target temperature, as described above, and sets a new target temperature. Then, the combustion control of the burner 6 is started (see step S6 in FIG. 3). Further, along with the start of combustion control, subtraction of the target temperature is started from the insufficient heat amount A every second (see step S7 in FIG. 3). Then, heating control for the purpose of keeping heat is started for the electric heater 62.

  Then, in step S9 in FIG. 3, it is determined again whether there is a request for hot water from the operation remote controller. If the determination in step S9 in FIG. 3 is negative, that is, if the hot water request is continued, the process returns to step S4 in FIG. On the other hand, if this determination is affirmative, that is, it is determined that there is no hot water request, the process proceeds to step S10 in FIG. 3 to determine whether the insufficient heat quantity A is “0”.

  If it is determined in this determination that the insufficient heat quantity A is “0”, the combustion of the burner 6 is stopped (step S11 in FIG. 3), the heating control of the electric heater 62 is stopped (step S12 in FIG. 3), and the circulation pump 17 The operation is stopped (step S13 in FIG. 3), the thermal valve 18 is closed (step S14 in FIG. 3), and the process returns to step S1 in FIG. That is, when the insufficient heat amount A is “0”, the heating operation is stopped until the next hot water request is received.

  In contrast, if it is determined in step S10 in FIG. 3 that the insufficient heat quantity A is not “0”, the heating operation is continued until the insufficient heat quantity A becomes “0” (see step S19 in FIG. 3). During these processes, if the controller 10 receives an operation switch signal indicating the operation switch OFF from the operation remote controller 42, the controller 10 immediately stops the heating operation. In this case, even if the insufficient heat quantity is being integrated in step S16 of FIG. 3, the integrated value is reset to “0”.

Embodiment 2
Next, a second embodiment of the present invention will be described with reference to FIG. The heating system shown in the second embodiment is obtained by modifying the control configuration of the controller 10 of the hot water heating heat source machine 2 when the burner 6 is in the combustion state in the heating system shown in the first embodiment. . Therefore, other basic configurations are the same as those of the heating system shown in the first embodiment, and portions having common configurations are denoted by the same reference numerals and description thereof is omitted.

  That is, in the heating system of the present embodiment, the controller 10 is configured to stop the heating control of the electric heater 62 as long as a certain condition described later is satisfied even when the burner 6 is burning. FIG. 4 is a flowchart showing an example of heating control of the electric heater 62 in the controller 10.

  In the heating system shown in the present embodiment, as shown in FIG. 4, in the heating control of the electric heater 62, the controller 10 first determines whether the heating control of the electric heater 62 is necessary (see step S <b> 1 in FIG. 4). . That is, it is determined that heating control is necessary when there is a request for hot water, and it is determined that heating control is not required when there is no request for hot water. Therefore, when there is no request for hot water, energization of the electric heater 62 is stopped (see step S2 in FIG. 4). On the other hand, when there is a request for hot water, the process proceeds to step S3 in FIG. 4 to determine whether the burner 6 is not combusting. When the burner 6 is not combusting, the detected temperature Ta of the vaporizer temperature sensor 27 is the electric heater. In the heating control of 62 (during heat retention), it is determined whether the temperature is lower than a lower limit temperature at which energization of the heater 62 is started (in the above example, a combustible temperature, hereinafter referred to as “energization start lower limit temperature”). If it is less than the lower limit temperature for starting energization, energization of the electric heater 62 is started and the vaporizer 61 is heated and heated (see step S5 in FIG. 4). On the other hand, the detected temperature Ta is the upper limit temperature at which the electric heater 62 is deenergized in the heating control of the electric heater 62 (in the above-mentioned example, it is the combustible temperature + y ° C .; When it is above, energization to the electric heater 62 is stopped (see steps S9 and S10 in FIG. 4).

  On the other hand, when the burner 6 is burning in the determination of step S3 in FIG. 4, the controller 10 acquires the rate of temperature rise (temperature gradient) of the carburetor 61 (see step S6 in FIG. 4). Specifically, when the burner 6 starts burning, the controller 10 acquires the detection temperature Ta of the vaporizer temperature sensor 27 at predetermined intervals while the burner 6 is burning, and the temperature rise The rate will be monitored.

  Then, the controller 10 determines whether or not the electric heater 62 is in an energized state (see step S7 in FIG. 4). If the electric heater 62 is in an energized state, whether or not the acquired temperature gradient has a gradient greater than a predetermined gradient (in other words, If the temperature rise rate exceeds a predetermined rate) (see step S8 in FIG. 4), and it is determined that the temperature rises at a gradient (ratio) equal to or greater than the predetermined gradient (ratio). Stops energizing the electric heater 62 (see step S11 in FIG. 4).

  Here, as the predetermined (temperature) gradient, a gradient (ratio of temperature increase) equal to or higher than a temperature gradient generated when at least the vaporizer 61 is heated only by the electric heater 62 is employed. That is, the case where the inclination is equal to or higher than the predetermined temperature gradient in step S11 in FIG. 4 is a case where heat transfer accompanying combustion of the burner 6 is added in addition to heat transfer by the electric heater 62. 6, since the temperature of the carburetor 61 is naturally increased or kept warm even when the electric heater 62 is de-energized, in step S11 in FIG. 4, the electric heater 62 is de-energized. ing.

  In the determination in step S8 of FIG. 4, along with the gradient of the temperature gradient, the above-described upper limit temperature of the electric heater 62 to stop energization (combustible temperature + y ° C.) and the current temperature of the vaporizer 61 (detected temperature Ta) It is also possible to stop the energization of the electric heater 62 when the temperature difference is equal to or less than a predetermined value. That is, if the temperature of the vaporizer 61 is close to the combustible temperature even if the temperature gradient of the vaporizer 61 is greater than or equal to a predetermined gradient, the temperature of the vaporizer 61 is stopped when the electric power supply to the electric heater 62 is stopped. However, in order to prevent such a situation from occurring, it is preferable that the temperature difference from the energization stop upper limit temperature is small.

  When the temperature gradient of the vaporizer 61 is less than the predetermined gradient in the determination at step S8 in FIG. 4, the same heating control as the normal (the process shown in steps S4, 5 and S9, 10 in FIG. 4). Is done.

  As described above, according to the heating system shown in the present embodiment, even when the burner 6 is in combustion, the power supply to the electric heater 62 can be stopped under a certain condition. Can be increased.

Embodiment 3
Next, a third embodiment of the present invention will be described with reference to FIG. In the heating system shown in the third embodiment, similar to the heating system shown in the second embodiment described above, by changing the control configuration of the controller 10, even if the burner 6 is in combustion, certain conditions described later are set. Although it is configured so that the heating control of the electric heater 62 can be stopped if it is satisfied, the control configuration of the controller 10 is different from the above-described second embodiment. Specifically, the heating system of the third embodiment also uses the heat transfer by the burner 6 to stop energization of the electric heater 62. Whether the heat transfer of the burner 6 can be sufficiently obtained or not. The determination is based on the combustion state of the burner 6. Since the other basic configuration is the same as that of the heating system shown in the first embodiment, portions having the same configuration are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 5 is a flowchart showing an example of heating control of the electric heater 62 in the controller 10 shown in the present embodiment.

  In the heating system shown in the present embodiment, as shown in FIG. 5, in the heating control of the electric heater 62, first, the controller 10 needs to control the heating of the electric heater 62 as in the second embodiment described above. (See step S1 in FIG. 5), and when there is no request for hot water, energization of the electric heater 62 is stopped (see step S2 in FIG. 5). On the other hand, when there is a request for hot water, the process proceeds to step S3 in FIG. 4 to determine whether the burner 6 is non-combustion. When the burner 6 is non-combustion, the temperature Ta detected by the carburetor temperature sensor 27 It is determined whether the temperature is equal to or higher than the stop upper limit temperature (combustible temperature + y ° C.) (see step S4 in FIG. 5). If the determination is affirmative, energization of the electric heater 62 is stopped (see step S5 in FIG. 5). On the other hand, when the detected temperature Ta is lower than the energization start lower limit temperature (combustible temperature), energization to the electric heater 62 is started (see steps S10 and S11 in FIG. 5).

  On the other hand, when the burner 6 is burning in the determination of step S3 in FIG. 5, the controller 10 confirms the combustion state of the burner 6 (see step S6 in FIG. 5). Specifically, the controller 10 acquires a detection value of the flame current detected by the flame rod 64 whenever the burner 6 is burning, and the combustion state is normal depending on whether or not the detection value is within a predetermined range. (See steps S6 and S7 in FIG. 5).

  If the combustion state is abnormal (Yes in step S7 in FIG. 5), heat cannot be obtained from the burner 6 to raise the temperature of the vaporizer 61. If it is in the energization stop state, the energization request state for the electric heater 62 is entered (see step S9 in FIG. 5). On the other hand, if the combustion state is normal (No in step S7 in FIG. 5), sufficient heat transfer is obtained from the burner 6 to the vaporizer 61, so the controller 10 determines whether the electric heater 62 is energized. (See step S12 in FIG. 5) If it is in the energized state, it enters the energization stop request state for the electric heater 62 (see step S13 in FIG. 5).

  Note that the energization request and energization stop request here do not immediately start or stop energization of the electric heater 62. That is, even if there is an energization request, if the electric heater 62 is equal to or higher than the energization stop upper limit temperature (combustible temperature + y ° C.) described above, energization cannot be started. This is because the electric heater 62 is lower than the energization start lower limit temperature (combustible temperature) and the energization may not be stopped.

  Therefore, in the present embodiment, the controller 10 first determines in steps S4 and S10 in FIG. 5 when either the energization request or the energization stop request occurs, and when the electric heater 62 is equal to or higher than the energization stop upper limit temperature. Energization is stopped (see steps S4 and S5 in FIG. 5), and energization is started when the temperature is lower than the energization start lower limit temperature (see steps S10 and S11 in FIG. 5). And even if it is in the state which is less than energization stop upper limit temperature and in the range more than energization start lower limit temperature, when there is the above-mentioned energization demand, energization to electric heater 62 is performed (Steps S14 and S15 of FIG. 5). On the other hand, when there is an energization stop request, the energization to the electric heater 62 is stopped (see steps S16 and S17 in FIG. 5).

  Therefore, also in the heating system shown in the present embodiment, even when the burner 6 is in combustion, the energization to the electric heater 62 can be stopped under a certain condition, so that the power saving effect in the electric heater 62 is enhanced. Can do.

  In the present embodiment, the controller 10 is configured to make an energization request or energization stop request to the electric heater 62 after confirming the combustion state of the burner 6, but the combustion state is confirmed and heating control is performed. If configured to control continuation / stop, for example, during the combustion of the burner 6 and during the heating control of the electric heater 62, the heating control is stopped at a predetermined timing without checking the combustion state, At that time, it is confirmed whether or not the detected value of the flame current is within a predetermined range corresponding to the normal combustion state (confirms the combustion state), and only when the flame current is out of the predetermined range corresponding to the normal combustion state It is also possible to configure to resume the heating control of the heater 62.

Embodiment 4
Next, a fourth embodiment of the present invention will be described with reference to FIG. The heating system shown in the fourth embodiment is a modification of the control configuration of the controller 10 in the heating system of the first to third embodiments described above, and the hot water heating heat source unit 2 requests hot water from the floor heating device 4 side. Is being performed and combustion control of the burner 6 is being performed, the heating control of the electric heater 62 is stopped if a certain condition described later is satisfied.

  FIG. 6 is a timing chart for explaining the control configuration of the controller 10 in the present embodiment.

  As shown in FIG. 6, the controller 10 in the heating system of the present embodiment stops the combustion of the burner 6 with respect to the target temperature of the circulating water in the combustion control of the burner 6 as in the other embodiments described above. The combustion stop temperature (for example, target temperature + 5 ° C.) to be started and the combustion start temperature (for example, target temperature −5 ° C.) for starting the combustion of the burner 6 are set. The combustion of the burner 6 is stopped when the detected temperature TLs of the low temperature going temperature sensor 26 rises to the combustion stop temperature, and the combustion of the burner 6 is started when the detected temperature TLs falls to the combustion start temperature.

In the present embodiment, the controller 10, such in the combustion control of the burner 6 the combustion of the burner 6 is stopped (time point t ₁₀ of FIG. 6), the heating control of the electric heater 62 in accordance with this It is configured to stop (stop energization of the electric heater 62).

By the way, when the heating control of the electric heater 62 is stopped in accordance with the combustion stop of the burner 6 in this way, the energization that starts the energization of the electric heater 62 in the heating control during the combustion stop period of the burner 6 is performed. May fall below the starting lower limit temperature. Therefore, in the present embodiment, when the heating control of the electric heater 62 is stopped during the combustion control of the burner 6, the controller 10 acquires the detected temperature TLs of the low temperature forward temperature sensor 26 at regular intervals. The rate at which the detected temperature TLs decreases is monitored, and when the rate of the temperature decrease exceeds a predetermined rate, the electric heater 62 even before the detected temperature TLs decreases to the combustion start temperature. start of heating control is configured to (starts energizing the electric heater 62) (see time point t ₁₁ of FIG. 6).

Therefore, in the heating system of the present embodiment, the heating control of the electric heater 62 is resumed in response to the temperature drop of the circulating water that is the heat medium. Therefore, before the combustion of the burner 6 is started according to the combustion control, A preheating period can be secured. Therefore, when the circulating water is trying to initiate combustion of the burner 6 decreases to the combustion start temperature, even immediately or delayed can shorten the delay (Note, t from t ₁₂ in FIG. 6 ₁₃ indicates a delay in the start of combustion), and the electric heater 62 can be saved without reducing the heating capacity of the floor heating device 4.

  In the embodiment described above, the controller 10 is configured to start the heating control of the electric heater 62 based on the rate at which the detected temperature TLs decreases. For example, the rate at which the detected temperature TLs decreases. Based on the above, the time required for the detected temperature TLs to decrease to the combustion start temperature (hereinafter referred to as “temperature decrease expected time”) is calculated, and the heating control of the electric heater 62 is resumed based on the temperature decrease expected time. It is also possible to configure so as to set the timing.

  Specifically, for example, the controller 10 stores in advance the temperature increase rate of the vaporizer 61 when the electric heater 62 is energized from the material and volume of the vaporizer 61 and the electric power of the electric heater 62, and the like. Based on the rate of temperature rise, the time required to raise the vaporizer 61 to the combustible temperature (hereinafter referred to as “preheating required time”) is obtained. Further, the estimated temperature decrease time is calculated by subtracting the combustion start temperature from the current circulating water temperature (detected temperature TLs) and dividing it by the rate of temperature decrease. When the preheating required time ≧ the temperature decrease expected time, the heating control of the electric heater 62 is started. Thus, as in the above-described embodiment, the electric heater 62 can be saved without the preheating being in time and the combustion of the burner 6 being delayed.

Embodiment 5
Next, a fifth embodiment of the present invention will be described. The heating system shown in the fifth embodiment relates to the control when the controller 10 stops the combustion control in the heating systems of the first to fourth embodiments described above, where there is no request for hot water from the floor heating device 4 side. Therefore, the control configuration of the controller 10 is also modified when the present embodiment is applied.

  That is, in the heating system shown in the present embodiment, when there is no hot water request from the floor heating device 4 side and combustion control is stopped, the controller 10 predicts in advance the time until the next hot water request is received. Thus, the heating control of the electric heater 62 is started during the hot water non-request period so that the preheating of the vaporizer 61 is completed before the next hot water request comes.

  Specifically, first, the controller 10 predicts the heating cycle from the period of the hot water request received immediately before, etc., and then the time until the next hot water request comes (hereinafter referred to as “warm water request arrival scheduled time”). Is calculated. Compared with the estimated time for the hot water request and the preheating time required to raise the vaporizer 61 to the combustible temperature, if the preheating time is equal to or higher than the estimated time for the hot water request, the electric Heating control of the heater 62 is started. Thereby, when the warm water non-request period elapses and the warm water request is made, the temperature of the vaporizer 61 is raised to the combustible temperature, so that the combustion of the burner 6 is delayed.

  Here, as the preheating time, for example, a value obtained by an experiment or the like in advance can be stored in the controller 10 as a fixed value, and the fixed value can be used as the preheating time. It is also possible to configure the controller 10 to calculate each time based on the detected value and the outside air temperature (this temperature is measured by providing a separate temperature sensor). Furthermore, the controller 10 learns the preheating time that has been required for heating so far (for example, the previous preheating time is stored, the average value of the past preheating times is calculated), and the learning is performed. The value can also be used as the preheating time.

  In the above-described embodiment, the configuration is such that the heating control of the electric heater 62 is started only in terms of time (preheating time ≧ warm water request arrival time) regardless of the temperature of the circulating water. It is also possible to control the temperature in consideration. That is, in this case, the controller 10 opens the thermal valve 19 at regular intervals and operates the circulation pump 17 to cause the floor heating panel 41 to circulate hot water even during the hot water non-request period. The detection temperature TLs of the forward temperature sensor 26 (that is, the temperature of the circulating water) is detected. If this temperature is equal to or higher than a predetermined temperature (for example, a temperature at which the burner 6 does not need to be combusted at the time of the next hot water request, such as a target temperature of circulating water), the initial period of the hot water non-request period and the next hot water request period In this case, the heating control of the electric heater 62 may not be performed.

  As described above in detail, according to the present invention (the inventions according to Embodiments 1 to 5), when there is no heat medium request from the heating terminal side, or when the burner 6 is not combusted even when there is a heat medium request. Furthermore, since the heating control of the heater 6 can be stopped under certain conditions even during combustion, the energization time to the heater can be reduced compared to the conventional product that always performs the heating control during these periods. It is possible to suppress power consumption in the electric heater 62. And since the control structure which does not produce the calorie | heat amount shortage of a heat medium is employ | adopted, energy saving can be achieved, without impairing the heating capability of a heating terminal. Furthermore, in any of the embodiments of the present invention, the electric heater of the carburetor 61 is not modified in any way in the control configuration on the heating terminal side (that is, only by changing the control configuration on the hot water heating heat source unit 2 side). The power consumption at 62 can be suppressed. Therefore, it is possible to obtain the above-described effects by replacing the hot water heating heat source unit 2 side (specifically, the controller 10) without replacing the existing heating terminal.

  Note that the above-described embodiments merely show preferred embodiments of the present invention, and the present invention is not limited to these, and various design changes can be made within the scope thereof.

  For example, in the above-described embodiment, the case where the present invention is applied to a heating system including the high-temperature heating terminal device 3 and the low-temperature heating terminal device (floor heating device 4) has been described. Any heating system configured to supply a heating medium to a heating terminal according to a predetermined heating cycle can be applied to a heating system having only one of a high temperature heating terminal device and a low temperature heating terminal device.

  Moreover, although the case where warm water (water) was used as a heat medium was shown in embodiment mentioned above, this invention is applicable also to the heating system which uses heat media other than water.

It is a schematic structure figure showing one embodiment of a heating system to which the present invention is applied. It is a timing chart which shows various signals when performing only floor heating in the heating system, and operation of each part of a hot water heating heat source machine. It is a flowchart which shows the control procedure of the controller when only floor heating is performed in the heating system. It is a flowchart which shows the control procedure of the electric heater by the controller in 2nd Embodiment of the heating system. It is a flowchart which shows the control procedure of the electric heater by the controller in 3rd Embodiment of the heating system. It is a timing chart for demonstrating the control structure of the controller in 4th Embodiment of the heating system. It is a schematic block diagram of the conventional heating system. It is a timing chart which shows operation | movement of the conventional heating system.

Explanation of symbols

1 Heating System 2 Hot Water Heating Heat Source Machine (Heating Heat Source Machine)
3 High-temperature heating terminal device 4 Floor heating device (heating terminal)
5 Heat exchanger 6 Burner 10 Controller (control means)
12 Internal high temperature forward pipe 13 Internal low temperature forward pipe 14 Internal return pipe 16 Bypass pipe 17 Circulation pumps 18 and 19 Thermal valve 27 Vaporizer temperature sensor (vaporizer temperature detection means)
41 Floor heating panel 42 Operation remote control 61 Vaporizer 62 Electric heater (heater)
64 Flame rod (flame current detection means)
v

Claims (7)

A heating combustion heat source unit having a burner and a fuel vaporizer, and a heating terminal connected to the heating heat source unit so as to communicate with the heating heat source unit while performing heating by receiving a supply of a heat medium from the heating heat source unit, The heating heat source machine intermittently supplies the heating medium to the heating terminal according to the heating medium request given from the heating terminal side according to a predetermined heating cycle composed of a heating medium request period and a heating medium non-request period. In the configured heating system,
When there is no heat medium request from the heating terminal side, the control means of the heating heat source machine does not perform heating control of the heater of the vaporizer, and from the time when the heat medium request is received from the heating terminal side, Assuming that the burner was burned at the time when the heating medium request was received, from the time when heating control was started to the time when the burner started combustion, the heating medium was given to the heating medium during this period The predicted shortage of heat is obtained, and a burner control is performed by setting a new target temperature obtained by adding the shortage of heat to the target temperature of the heat medium set in the heat medium request. Heating system.   The target temperature of the newly set heat medium is set so that a heat amount corresponding to the insufficient heat amount is given to the heat medium within the heat medium request period when the burner starts combustion. The heating system according to claim 1.   The heating system according to claim 1, wherein a target temperature of the newly set heat medium is set in advance as a specified value.   Depending on the target temperature of the newly set heat medium, if the heat medium is not given a heat quantity corresponding to the insufficient heat quantity within the heat medium request period when the burner starts combustion, the heat medium 4. The heating system according to claim 3, wherein combustion control is continued until a heat amount corresponding to the insufficient heat amount is given to the heat medium even in a heat medium non-request period that is continuous with the medium request period.   The control unit of the heating heat source unit monitors the detection temperature of the vaporizer temperature detection unit that detects the temperature of the vaporizer when heating control of the heater is started, and the temperature rise of the vaporizer exceeds a predetermined ratio. In the case, the heating system according to any one of claims 1 to 4, wherein heating control of the heater is stopped.   The control means of the heating heat source unit monitors the detection value of the flame current detection means for detecting the flame current of the burner during the heating control of the heater, and when the flame current is within a predetermined range, the heating control of the heater The heating system according to claim 1, wherein the heating system is stopped.   The control unit of the heating heat source unit is configured to stop the heating control of the heater when the burner stops combustion even during the period when the heating medium request is received from the heating terminal side in the combustion control of the burner. After the heating control of the heater is stopped, the detected value of the heating medium temperature detecting means for detecting the temperature of the heating medium is monitored, and when the temperature of the heating medium satisfies a predetermined temperature drop condition, the heater The heating system according to any one of claims 1 to 6, wherein the heating control is started.

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