JP2007255741A - Hot water supply and space heating heat source machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water supply and space heating heat source machine, more precisely detecting conduction abnormality in a plate type heat exchanger. <P>SOLUTION: This hot water supply and space heating heat source machine 1 includes a hot water supply circulating circuit C for circulating some of a heating medium stored in a heating medium storing part 9 to the primary side of a plate heat exchanger 45 for general hot water supply, and heating the secondary side clean water to perform instantaneous general hot water supply, wherein the conduction abnormality of the plate heat exchanger 45 is detected based on the liquid level of a heating medium of a reservoir tank 20. At that time, when a liquid level detecting electrode 35 detects a rise of liquid level within a fixed time from the time of supplying the heating medium, supplement of the heating medium to the reservoir tank 20 is considered to be excess, and an error is informed as an artifitial construction failure. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a hot water supply / heating heat source machine, and more specifically, a heating medium heated by a heating unit is used for heating medium circulation heating, and a part of the heating medium is circulated to a primary side of a liquid-liquid heat exchanger. The present invention relates to a hot water supply / heating heat source device having a structure for heating general water by heating clean water.

  The applicant, as a hot water supply heating heat source machine capable of performing both heating and general hot water supply at the same time, stores a heating medium heated by one heating means in a tank, and this heating medium is stored using a semi-enclosed heating circulation circuit. In addition to being used for heat-medium circulation heating, a part of it is circulated to the primary side of the plate heat exchanger (liquid-liquid heat exchanger) with a circulation pump, and the supply water pressure is used on the secondary side of the plate heat exchanger Then, a hot water supply / heating heat source machine was newly devised, which supplies both clean water and heats the clean water with a plate heat exchanger to achieve both the heating function and the instantaneous general hot water supply function.

  In the hot water supply / heating heat source unit configured as described above, as a method of detecting a conduction abnormality between the primary side and the secondary side due to a crack of the plate of the plate heat exchanger, a heat medium is supplied to the reserve tank of the heating circulation circuit. Displacement detection method for determining that a conduction abnormality has occurred in the plate heat exchanger when an abnormal rise in liquid level is detected with this liquid level detection electrode. It was decided to use. In this regard, Patent Document 1 discloses that a liquid level detection electrode is provided not in a reserve tank but in a heating heat medium tank to detect a conduction abnormality in a liquid-liquid heat exchanger.

  On the other hand, if the abnormality of conduction of the plate heat exchanger is detected based on the liquid level of the heat medium in the reserve tank in this way, for example, when the hot water supply / heating heat source machine is constructed, When the medium is replenished too much, the liquid level detection electrode detects the liquid level due to the thermal expansion of the heat medium accompanying the heating operation, even though there is no conduction abnormality in the plate heat exchanger. There was a risk of misjudgment as conduction abnormality of the plate heat exchanger.

  Therefore, as a further improvement, the applicant provides a liquid level limiting drain for limiting the liquid level of the heating medium at a predetermined height position of the reserve tank, and opens the liquid level limiting drain when supplying the heating medium. By doing so, it came to think about preventing the excessive supply at the time of supply of a heat medium.

Japanese Patent Laid-Open No. 2003-114056

  However, even if measures are taken to prevent excessive supply of the heat medium during replenishment of such heat medium, such a countermeasure is presumed to be an artificial operation of opening the discharge port of the reserve tank, and it is difficult to expect completeness. For example, when the heat medium is replenished to the reserve tank without forgetting to open the drain port for limiting the liquid level, there is a possibility that a conduction abnormality of the plate heat exchanger is erroneously detected.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a hot water supply / heating heat source machine capable of more accurately detecting a conduction abnormality in a plate heat exchanger. It is in.

  Note that the present invention relates to the present invention because it prevents false detection in the conduction abnormality detection of the plate heat exchanger in the hot water heating / heating heat source machine of the novel configuration proposed by the applicant as described above. There are no known documents known to the applicant.

  In order to achieve the above object, a hot water supply / heating heat source apparatus according to claim 1 of the present invention is a primary side of a liquid-liquid heat exchanger using a circulation pump for a part of a heating heat medium stored in a heat medium storage section. The hot water supply / heating heat source machine is equipped with a hot water supply circulation circuit that heats the water supplied to the secondary side using the supply water pressure to perform instantaneous general hot water supply, and in the reserve tank of the heating circulation circuit In the case where a liquid level detection electrode for detecting the liquid level of the heat medium is provided to detect a continuity abnormality of the liquid-liquid heat exchanger, the control means has passed a predetermined time after receiving a heating trial operation or a water-filled operation. Timer means for measuring whether or not, a counting means for counting the detection state of the liquid level detection electrode at a predetermined counting cycle, and a count for determining whether the count value of the counting means has reached a predetermined specified value Determination means and determination result of the count determination means Notification means for notifying, and until the timer means detects the lapse of a predetermined time, the count determination means makes a determination with the specified value of the counting means as a first specified value, and the count value is When the specified value is equal to or greater than one specified value, it is determined that the artificial construction failure has occurred and the notification means notifies the timer, and after the timer means detects the lapse of a predetermined time, the specified value of the counting means is changed to the first specified value. When the count value is equal to or greater than the second specified value, the liquid-liquid heat exchanger is determined to be abnormal in conduction and notified by the notification means. It is characterized by having a control structure to do.

  That is, the hot water supply / heating heat source apparatus according to claim 1 compares the count value of the detection state of the liquid level detection electrode depending on whether or not a predetermined time has elapsed since the control means received the operation of the heating trial operation or the water filling operation. Change the default value. Specifically, by increasing the specified value after elapse of before a predetermined time has passed, it is artificial such as when too much heat medium is added at the time of construction or when the heat medium is replenished after construction. The detection of the liquid level due to a mistake is not determined as a conduction abnormality of the liquid-liquid heat exchanger, but is determined as an artificial construction failure and promptly notified.

  In other words, the hot water heating / heating heat source machine according to claim 1 monitors the state of the liquid level detection electrode by using a small specified value immediately after replenishing the heat medium, such as during construction, and causes artificial work defects (too much heat medium). While a certain period of time has passed without any artificial work defects being detected, the liquid level detection electrode status is monitored using a large specified value to detect continuity abnormalities. It is configured so that erroneous detection is reduced.

  The hot water supply heating heat source machine according to claim 2 of the present invention circulates a part of the heating heat medium stored in the heat medium storage section to the primary side of the liquid-liquid heat exchanger with a circulation pump, and supplies the supply water pressure. This is a hot water supply / heating heat source machine equipped with a hot water supply / circulation circuit that heats the water supplied to the secondary side and uses it for instantaneous general hot water supply, and detects the level of the heat medium in the reserve tank of the heating / circulation circuit In the case where the liquid level detection electrode is provided to detect the conduction abnormality of the liquid-liquid heat exchanger, the control means measures whether or not a predetermined time has elapsed since the operation of the heating trial operation or the water filling operation was accepted. Timer means, counting means for counting the detection state of the liquid level detection electrode at a predetermined counting cycle, count determining means for determining whether the count value of the counting means has reached a predetermined specified value, and the count determination An informing means for informing the determination result of the means Until the timer means detects the elapse of a predetermined time, the count determining means sets the counting cycle at the counting means as the first period, and the specified value of the counting means as the first specified value. When the count value is equal to or greater than the first specified value, it is determined that the artificial work is defective and notified by the notification means, and after the timer means detects the lapse of a predetermined time, the count means The counting period is determined as the second period longer than the first period and the specified value of the counting means is set as the second specified value larger than the first specified value. A control structure is provided in which when the value is equal to or greater than the second specified value, the continuity abnormality of the liquid-liquid heat exchanger is determined and notified by the notification means.

  That is, the hot water supply heating heat source machine according to claim 2 has a counting cycle for counting the detection state of the liquid level detection electrode depending on whether or not a predetermined time has elapsed since the control means received the operation of the heating trial operation or the water-tight operation. Then, the value of the specified value to be compared with the count value which is the counting result is changed. Specifically, by increasing the counting cycle after the lapse of a predetermined time and changing the specified value greatly, the heating medium was overfilled during construction or the heating medium was oversupplied after construction. The detection of the liquid level due to an artificial mistake as in the case is not determined as a continuity abnormality of the liquid-liquid heat exchanger, but is determined as an artificial construction failure and promptly notified.

  In other words, the hot water heating / heating heat source machine according to claim 2 monitors the state of the liquid level detection electrode using a short count cycle and a small specified value immediately after replenishing the heat medium such as during construction, and causes an artificial work defect (heat medium). It is configured to detect and notify early detection), but after a certain amount of time has passed without any artificial construction failure being detected, the liquid level detection electrode can be detected using a long count cycle and a large specified value. The state is monitored so that erroneous detection of continuity abnormality is reduced.

  The hot water supply / heating heat source machine according to claim 3 of the present invention is the hot water supply / heating heat source machine according to claim 1 or 2, wherein the control means increases or decreases when the count by the counting means increases or decreases beyond a predetermined value. When the power of the hot water supply / heating heat source machine is turned on again, the timer means starts measuring the predetermined time from the time of turning on the power again. The means reads out the count value stored in the storage means and restarts the count, and the count determination means makes a comparison determination with the specified value based on the restarted count value.

  That is, the hot water supply / heating heat source machine according to claim 3 stores the count value in a non-volatile storage means under a certain condition, and when the power supply of the hot water supply / heating heat source machine is reset (returned), Immediately thereafter, the state of the liquid level detection electrode is monitored using a small specified value (or a small specified value in a short counting cycle), and the value before power reset is used as a count value to be compared with the specified value. Thereby, when the above-mentioned artificial construction failure or the continuity abnormality of the liquid-liquid heat exchanger is notified, even if there is a power failure or the user resets the power supply of the hot water heating / heating source, the error notification is resumed. Therefore, it is possible to reliably notify abnormality of the hot water supply / heating heat source machine. That is, the configuration of claim 3 is configured such that the notification of the error cannot be canceled by resetting the power of the hot water supply / heating heat source machine.

  A hot water supply / heating heat source machine according to a fourth aspect of the present invention is the hot water supply / heating heat source machine according to any one of the first to third aspects, wherein the control means is the artificial construction failure or the liquid-liquid heat exchanger. It is characterized by comprising safe operation command means for executing a predetermined safe operation when it is determined that the continuity is abnormal. According to a fifth aspect of the present invention, there is provided a hot water supply / heating heat source unit according to the fourth aspect, wherein the safety operation command means executes a process of stopping the hot water supply of the general hot water supply as the safety operation. It is characterized by that.

  That is, in the hot water supply / heating heat source machine according to claim 4, the control means determines that the artificial construction failure or the liquid-liquid heat exchanger conduction abnormality is present (the liquid-liquid heat exchanger conduction abnormality may be abnormal). And a predetermined safe operation is executed, a safe hot water supply / heating heat source machine can be provided. In particular, according to the fifth aspect, by performing the process of stopping the hot water from the general hot water supply, it is possible to prevent the hot water mixed with the heat medium from being discharged from the hot water tap.

  A hot water supply / heating heat source machine according to claim 6 of the present invention is the hot water supply / heating heat source machine according to any one of claims 1 to 5, wherein the control means is configured to perform the artificial operation by a predetermined operation of an operating device of the hot water supply / heating heat source machine. It is characterized by having a control configuration for canceling the determination of a poor construction failure.

  That is, in the hot water supply / heating heat source machine according to the sixth aspect, the determination of the artificial construction failure can be canceled by operating an operating device (for example, a remote controller) provided in the hot water supply / heating heat source machine. This is because, for example, if it is determined that the artificial work is poor immediately after construction, it is rare that the liquid-liquid heat exchanger is abnormal in conduction. It is configured to release the safe operation.

  A hot water supply / heating heat source machine according to a seventh aspect of the present invention is the hot water supply / heating heat source machine according to any one of the first to sixth aspects, wherein the control means is configured such that the heating circulation circuit is a semi-hermetic type or a hermetic type. There is provided a type setting means for setting whether or not there is, and the counting cycle of the counting means and the specified value of the count determining means are switched according to the setting of the type setting means.

  That is, the hot water supply / heating heat source machine according to claim 7 is configured to change the counting cycle of the counting means and the specified value of the counting determining means in accordance with the configuration of the circulation circuit for heating (sealed type or semi-sealed type). By doing so, it is possible to perform an accurate error determination according to the usage mode of the instrument.

  The hot water supply / heating heat source machine according to claim 8 of the present invention is the hot water supply / heating heat source machine according to any one of claims 1 to 7, wherein the control means counts in the notification means during execution of the heating trial operation. The determination result of the determination means is not notified.

  That is, the hot water supply / heating heat source apparatus according to claim 8 performs counting by the counting means during the heating trial operation, but does not perform notification by the notification means, and is prevented from being reported as an error during the heating trial operation. .

  Thus, according to the hot water heating / heating source according to claim 1 of the present invention, immediately after the heating medium is replenished, such as during construction, the state of the liquid level detection electrode is monitored using a small specified value. Since it is configured to detect and notify defects (too much heat medium) at an early stage, if the heat medium is excessively replenished, an error will be notified while the worker is at the construction site. It is possible to improve construction defects on the spot. Even if the error is notified after the worker returns, the error is notified in a relatively short time from the end of the construction work, so the error is notified before the user forgets that the worker has come. Therefore, information from the user can be obtained reliably, and construction defects can be promptly improved.

  On the other hand, after a certain amount of time has passed without any artificial work defects being detected, the liquid level detection electrode state is monitored using a large specified value, so a continuity abnormality in the liquid-liquid heat exchanger is erroneously detected. Therefore, accurate error determination can be performed.

  Further, according to the hot water supply / heating heat source machine according to claim 2 of the present invention, immediately after replenishing the heat medium such as during construction, the state of the liquid level detection electrode is monitored by using a short counting cycle and a small specified value. Because it is configured to detect and notify early construction failures (too much heat medium), if the heat medium is excessively replenished, an error will be reported while the worker is at the construction site. Therefore, it is possible to improve the construction defects on the spot. In particular, by using a short counting cycle immediately after the replenishment of the heat medium, it becomes possible to report an error in a shorter time than in the case of claim 1 and to establish an error notification before the worker leaves. Can be increased. Even if an error is reported after the worker returns, the error is reported in a relatively short time from the end of the construction work, so the error is reported before the user forgets that the worker has come. The Therefore, information from the user can be obtained reliably, and construction defects can be promptly improved.

  On the other hand, after a predetermined time has elapsed without any artificial work defects being detected, the liquid level detection electrode is monitored using a long count cycle and a large specified value, so that the liquid-liquid heat exchanger is connected. It is possible to make a more accurate error determination by reducing the number of abnormal detections.

  Furthermore, according to the hot water supply / heating heat source machine according to claim 3, since the count value is taken over even if the power supply is reset, an artificial work failure or a continuity abnormality of the liquid-liquid heat exchanger is notified. When the power is turned off, the error notification is resumed even if the power is turned on again by a power failure or the user resetting the power by mistake. Therefore, the user can be surely recognized the error without missing these errors.

  Further, according to the hot water supply / heating heat source machine according to claim 4, since the control means executes a predetermined safety operation when it is determined that the artificial construction failure or the conduction abnormality of the liquid-liquid heat exchanger is performed, a safe hot water supply / heating heat source is provided. Can provide a machine. In particular, according to the hot water supply / heating heat source machine according to the fifth aspect, since the hot water discharge of the general hot water supply is stopped as a safe operation, it is possible to prevent the hot water mixed with the heat medium from being accidentally discharged from the hot water tap.

  In addition, according to the hot water supply / heating heat source machine according to claim 6, in the case of the determination that the artificial work is defective, the error can be canceled by the operation device of the hot water supply / heating heat source machine, so that the user himself replenishes the heat medium, for example. When an error is notified by doing so, the error can be canceled by the user's own operation, and an easy-to-use hot water supply / heating heat source machine can be provided.

  Further, according to the hot water supply / heating heat source machine according to claim 7, the counting cycle of the counting means and the specified value of the counting judging means can be changed according to the configuration of the circulation circuit for heating. Error determination can be performed.

  Furthermore, according to the hot water supply / heating heat source machine according to the eighth aspect, since the error notification is not performed during the heating trial operation, it is possible to perform the operation comfortably without being bothered by the error notification during the operation. .

Embodiment 1
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a hot water supply system using a hot water supply / heating heat source device according to the present invention, and FIG. 2 is an external view of the hot water supply / heating heat source device. Moreover, FIG. 3 is an assembly drawing which shows the example of arrangement | positioning of the main components of the hot-water supply heating heat source machine.

  The hot water supply / heating heat source unit 1 of the present invention supplies a heat medium (for example, antifreeze) heated by a heating means to a heating device such as a fan convector or a floor heating panel as a heating heat medium, as well as a curan or shower. A heat source device used as a heat source for heating hot water (general hot water) supplied to various hot water taps, and a hot water supply / heating heat source device 1 shown in the present embodiment is used for a heating circulation circuit A for heating and a bath reheating bath. A recirculation circuit B and a hot water supply circulation circuit C for general hot water supply are provided.

  Specifically, as shown in FIG. 1, the hot water supply / heating heat source machine 1 includes a combustion can body 2 that uses oil such as kerosene as fuel as heating means. The combustion can body 2 includes a combustion chamber 3 for burning fuel in the can case 2a, and heat for heating and heating the heating medium using the heat of the flame and combustion gas generated in the combustion chamber 3. The main part is provided with an exchanger unit 4 and an exhaust cylinder 5 for discharging combustion gas to the outside of the combustion can body 2.

  The combustion chamber 3 is a substantially cylindrical space provided in the lower part of the combustion can body 2, and a fuel injection nozzle 6 and an ignition electrode rod 7 are provided facing the combustion chamber 3. A blower fan 8 for sending combustion air into the combustion chamber 3 is provided. Then, the fuel in the combustion chamber 3 is ignited by applying a voltage to the electrode rod 7 while injecting and supplying the fuel from the fuel injection nozzle 6 into the combustion chamber 3, and burns into the combustion chamber 3 by the blower fan 8. Combustion in the combustion chamber 3 is maintained by feeding the working air.

  The heat exchanger unit 4 is heated by the gas-liquid heat exchanger that heats and raises the temperature of the heat medium using the heat of the combustion gas generated in the combustion chamber 3 and the gas-liquid heat exchanger. And a liquid-liquid heat exchanger that performs bath retreat using a heat medium.

  Specifically, the heat exchanger section 4 includes a large-capacity heat medium storage section 9 that stores the heat medium on the outer periphery and above the combustion chamber 3 as the gas-liquid heat exchanger. The heat medium stored in the heat medium storage unit 9 by combustion in the combustion chamber 3 is configured to be heated and heated. More specifically, a passage 91 for the combustion gas is formed in the heat medium storage portion 9 in the vertical direction from the combustion chamber 3, and the heat medium is stored in the process in which the combustion gas passes through the passage 91 to the exhaust pipe 5. Heat exchange with the heat medium in the section 9 is performed. In the figure, reference numeral 92 denotes a temperature sensor (hot water storage body thermistor) that detects the temperature of the heat medium in the heat medium storage unit 9.

  On the other hand, the liquid-liquid heat exchanger of the heat exchanger unit 4 is a coil-type heat exchanger provided in a heat medium storage unit 9 formed above the combustion chamber 3, and one end of the coil 10. Is connected to the return pipe 11 and the other end is connected to the return pipe 12. That is, the liquid-liquid heat exchanger is configured to heat and heat the bath water in the coil 10 using the heat of the heat medium stored in the heat medium storage unit 9.

  The heating circuit A supplies the heating medium heated and heated in the heating medium storage unit 9 of the heat exchanger unit 4 to a heating appliance (not shown), and heats the heating medium radiated by the heating appliance again. This is a circulation circuit for returning to the exchanger unit 4 to raise the temperature of heating, and in the illustrated example, a heat medium having a relatively high temperature (for example, about 80 ° C.) such as a bathroom dryer or a fan convector is required. Both heating appliances (hereinafter referred to as high temperature terminals) and heating appliances (hereinafter referred to as low temperature terminals) that require a relatively low temperature (for example, about 30 ° C. to 40 ° C.) heating medium such as floor heating panels. It is comprised so that a heat medium can be supplied to.

  That is, the heating circulation circuit A1 for the high-temperature terminal is supplied from the heating forward pipe 13 (specifically, the heating forward connection port 110 provided at the tip thereof) connected to the upper part of the heat medium storage unit 9 to the hot water supply / heating heat source. The heating medium is sent to a high temperature terminal outside the housing of the machine 1, and the heat medium radiated by the heat exchanger (not shown) of the high temperature terminal is used as a heating return pipe 14 (specifically, heating) It is configured to return to the return connection 111).

  Here, the connecting port 110 for heating and returning and the connecting port 111 for heating return are fittings for connecting pipes attached to the side surface of the casing 101 of the hot water supply / heating heat source unit 1 as shown in FIGS. In addition, a pipe (not shown) to the high temperature terminal is connected to each of the connection ports 110 and 111.

  And this heating return piping 14 is connected with the heating heating-medium tank 15 which stores a heating-heating medium. A pipe 16 for returning the heating medium returned to the heating heating medium tank 15 to the heating medium storage unit 9 and supplying the heating medium to the low temperature terminal is connected to the lower part of the heating heating medium tank 15. A heating circulation pump 19 for forcibly circulating the heat medium in the heating circuit A is provided in the pipe 16. And the front-end | tip of this piping 16 is branched, One comprises the heat-medium return piping 17 connected to the lower part of the said heat-medium storage part 9, and the other comprises the heating low temperature going-out piping 18 mentioned later.

  In summary, in the heating circuit A1 for the high temperature terminal, the heat medium heated and heated in the heat medium storage unit 9 is heated from the upper part of the heat medium storage unit 9 to the heating forward pipe 13, the high temperature terminal, the heating return pipe 14, and the heating. The heat medium tank 15 and the heat medium return pipe 17 are circulated to the lower part of the heat medium storage unit 9.

  On the other hand, the heating circuit A2 for the low temperature terminal is connected to the casing of the hot water supply / heating heat source unit 1 from the heating / low temperature forward pipe 18 (specifically, the heating / low temperature connection port 112 provided at the tip of the heating / low temperature forward pipe 18). The heat medium is sent to a low temperature terminal outside the body 101, and the heat medium returning through the low temperature terminal returns to the heating return pipe 14 (the heating return connection port 111). Here, the heating / low temperature connection port 112 is also provided on the side surface of the housing 101 in the same manner as the heating connection port 110 described above (see FIGS. 2 and 3).

  In the present embodiment, the heating heat medium tank 15 is configured as a so-called semi-enclosed heat medium tank provided with a reserve tank 20. Specifically, the heating heat medium tank 15 includes a mounting portion 22 for mounting the pressure regulating valve 21 in a detachable manner on the upper portion thereof. And in this embodiment, the radiator cap provided with the pressurization valve and the negative pressure valve is used as this pressure control valve 21, and the said mounting part 22 has the structure which can attach or detach this radiator cap in connection with this. Has been.

  The heating heat medium tank 15 is provided with such a pressure adjusting valve 21 so that when the pressure in the heating heat medium tank 15 exceeds a predetermined pressure, the pressurizing valve is operated to heat the heat in the heating heat medium tank 15. The medium is sent into the reserve tank 20 through the escape pipe 23 communicating with the reserve tank 20, and conversely, when the pressure in the heating heat medium tank 15 decreases and the inside of the tank becomes negative pressure, the negative pressure valve is activated, A heat medium is supplied from the reserve tank 20 to the heating heat medium tank 15 through the escape pipe 23.

  The heating heat medium tank 15 is arranged at the upper part of the hot water supply / heating heat source unit 1 in association with the configuration of the pressure adjusting valve 21 so as to be detachable. Specifically, the radiator cap is disposed by opening the opening / closing lid 102 so that the mounting portion 22 faces the opening / closing lid 102 (see FIGS. 2 and 3) provided on the upper surface of the hot water supply / heating heat source unit 1. It is comprised so that attachment / detachment work of can be performed easily.

  The heating heat medium tank 15 is connected to a bypass pipe 36 for adjusting the temperature of the heat medium in the tank. The bypass pipe 36 can supply a high-temperature heat medium directly to the heating heat medium tank 15 from the heat exchanger section 4 (specifically, the upper part of the heat medium storage section 9) without going through the heating appliance. The bypass pipe 36 is provided with a bypass flow rate control valve 37 for controlling the flow rate in the pipe. In the figure, reference numeral 38 denotes a water level detecting device for detecting a drop in the liquid level in the heating / heating medium tank 15.

  As shown in FIG. 4, the reserve tank 20 is composed of a box-shaped resin tank having a substantially rectangular shape in any of a plan view, a front view, and a side view, and a relief for connecting the relief pipe 23 to the upper surface. A pipe connection port 25 and a heat medium replenishment port 26 for replenishing the heat medium are opened through the tank. As shown in FIGS. 2 and 3, the reserve tank 20 is disposed below the heating heat medium tank 15. Therefore, an opening 27a for replenishing the heat medium to the reserve tank 20 is opened at a position facing the opening / closing lid 102, and a heat medium replenishment pipe connecting the opening 27a and the heat medium replenishing port 26 is provided. 27 is disposed.

  Further, on the side surface of the reserve tank 20, there is a drain port 28 used for extracting the heat medium in the reserve tank 20 during maintenance and the like, and overflow drainage for discharging excess heat medium when the reserve tank 20 overflows. The outlet 29 is provided so as to protrude, and when the reserve tank 20 is installed at a predetermined position, the drain outlets 28 and 29 are exposed to the outside of the casing of the hot water supply heat source unit 1 ( (See FIG. 2). The drain port 28 is opened only when the heat medium is discharged from the tank 20, and is closed in other cases (normal time).

  In the present embodiment, a third drainage port (liquid level restriction drainage port) 30 is further provided at a predetermined height position on the back surface of the reserve tank 20. The third drainage port 30 is a drainage port provided to limit the liquid level in the reserve tank 20 when the heating medium is replenished, and the height position of the third draining port 30 is the height of the heating medium during the heating operation. Even if the liquid level in the tank rises due to thermal expansion, a liquid level detection electrode 35 described later is set to a height position at which the liquid level of the heat medium is not detected.

  The drain 30 is connected to a drain pipe 31 for discharging the heat medium exceeding the liquid level restriction by the drain 30 to the outside of the casing 101 of the hot water supply / heating heat source unit 1. An open / close plug 32 as a pipe opening / closing means for switching between closing / opening of the pipe of the drain pipe 31 is detachably attached to the tip of the pipe. The drain pipe 31 is made of a flexible material such as rubber, and is disposed so that the tip of the drain pipe 31 protrudes downward from the drain port 30 toward the side surface of the housing 101.

  That is, in the drain pipe 31, when the opening / closing plug 32 is opened, the heat medium exceeding the liquid level restriction by the drain port 30 is naturally discharged to the outside of the housing 101 through the drain pipe 31. It is provided as follows. The open / close plug 32 of the drain pipe 31 is manually opened (opened) when the heating medium is replenished, and is closed (closed) in other cases (normal time).

  Thus, by providing the third drain port 30 in the reserve tank 20, when the heating medium is replenished, the open / close plug 32, which is a pipe opening / closing means, is opened to open the drain pipe 31. In this state, if the heating medium is replenished from the opening 27a for replenishing the heating medium, the heating medium replenished beyond the limit due to the liquid level restriction by the liquid level restriction drain 30 is discharged from the drain 30 to the drain pipe 31. It is naturally discharged to the outside through the housing. Therefore, when replenishing the heat medium, the worker can avoid replenishing the heat medium excessively without visually checking the liquid level of the heat medium through the liquid level monitoring window 103 provided on the front surface of the housing.

  In particular, in this embodiment, as will be described later, this embodiment employs a configuration for detecting a conduction abnormality of a liquid-liquid heat exchanger for general hot water supply using a liquid level detection electrode 35 provided in the reserve tank 20. In connection with this, there is an advantage that erroneous detection of abnormal conduction due to excessive heating medium can be easily and reliably prevented.

  And the reserve tank 20 comprised in this way is provided with the liquid level detection electrode 35 for detecting the conduction abnormality of the liquid-liquid heat exchanger for the general hot water supply mentioned later (refer FIG. 1). The liquid level detection electrode 35 is provided for detecting an abnormal liquid level rise in the reserve tank 20 (more specifically, an abnormal liquid level rise exceeding the liquid level rise due to thermal expansion during heating operation). An electrode rod for detecting the liquid level is arranged vertically in the tank. When the liquid level of the heat medium in the reserve tank 20 rises due to an abnormal liquid level rise and comes into contact with the tip of the electrode 35, the detection signal is transmitted to the control means 100 described later.

  The recirculation circuit B is a circulation circuit for heating hot water in a bathtub (not shown) (hereinafter referred to as bathtub water), and as described above, the coil 10 disposed in the heat medium storage unit 9 and The main part is composed of a bath pipe 11 connected to the coil 10, a bath return pipe 12, and a circulation pump 39 for forcibly circulating bath water.

  Specifically, the bath water heated and heated by the coil 10 is guided to the outside of the casing of the hot water supply / heating heat source unit 1 through the bath piping 11 (the bath connection port 113), and is placed on the inner surface of the bath. It discharges in the bathtub from the provided circulation adapter (not shown). On the other hand, bath water is also sucked in via the circulation adapter. That is, the above-described return return pipe 12 (specifically, the return return connection port 114) is also connected to the circulation adapter, and the recirculation pump 39 for replenishment is sequentially provided on the return return pipe 12 from the upstream side in the flow direction. A water flow switch 40 and a bath temperature sensor 41 are provided.

  In the figure, reference numeral 42 indicates a three-way valve connected to the bypass pipe 43. In the three-way valve 42, the port on the heat exchanger section 4 side and the port on the circulation pump 39 side are in communication with each other when the bath is replenished. On the other hand, when the hot water is dropped into the bathtub, the port on the bypass pipe 43 side and the port on the circulation pump 39 side are in communication with each other, the hot water heated by the plate heat exchanger 45 is dropped, and the flow pipe 11 passes through the circuit 58. And the return pipe 12 can be supplied to the bathtub at the same time. It should be noted that the forward connection port 113 and the return connection port 114 are also provided on the side surface of the housing 101 in the same manner as the heating connection port 110 described above (see FIGS. 2 and 3).

  Thus, the recirculation circuit B is configured as described above, and when the bath is refueled, the flow path of the three-way valve 42 is set to the heat exchanger section 4 side, and the circulation pump 39 is driven. Bath water heated and heated by the coil 10 is supplied to the bathtub through the forward piping 11, and bathtub water from the bathtub is circulated to the coil 10 again through the return piping 12.

  Next, the hot water supply circulation circuit C will be described. The hot water supply circuit C circulates a part of the heating heat medium heated by the heat exchanger section 4 to the primary side of the liquid-liquid heat exchanger for general hot water supply, and uses the water supply pressure to perform secondary operation. It is the circulation circuit for heating the tap water supplied to the side and performing instant type hot water supply.

  Specifically, the hot water supply circulation circuit C takes out the plate heat exchanger 45 as a liquid-liquid heat exchanger for general hot water supply and the plate heat by taking out a high-temperature heat medium from the upper part of the heat medium reservoir 9. The hot water supply piping 46 to be supplied to the primary side of the exchanger 45, the hot water return piping 47 for returning the heat medium radiated by the plate heat exchanger 45 to the lower part of the heat medium storage section 9, and the heat medium between them. The main part is a circulation pump 48 for hot water supply for forced circulation.

  And at the time of general hot water supply, the circulating pump 48 is driven to supply the high-temperature heat medium at the top of the heat medium reservoir 9 to the primary side of the plate heat exchanger 45, and the water flowing on the secondary side is supplied. It is used as a heat source for heating.

  On the other hand, a hot water supply circuit for general hot water supply is connected to the secondary side of the plate heat exchanger 45. Specifically, a water supply pipe 50 connected to a water supply source such as city water is connected to one end on the secondary side of the plate heat exchanger 45 through a water supply connection port 115, and to the other end. The hot water supply pipe 51 is connected to the hot water supplied from the water supply pipe 50 by using the water supply pressure, and is heated and heated when passing through the secondary side of the plate heat exchanger 45.

  The hot water supply system shown in FIG. 1 is configured to use the clean water heated and heated by the plate heat exchanger 45 in this manner for discharging hot water from a hot water tap and dropping it into a bathtub. Specifically, the outlet pipe 51 is connected to a hot water mixing valve 52 and mixed with normal temperature (unheated) clean water supplied through a branch pipe 53 branched from the water supply pipe 50 in the hot water mixing valve 52 to supply hot water. Generate hot water at the set temperature.

  And the hot water produced | generated in this way is distributed through the piping 54 connected to the exit side of the hot-water mixing valve 52 for the supply to a hot-water tap, and the use for dropping into a bathtub. That is, the pipe 54 is branched into a hot water supply pipe 55 connected to a hot water supply connection port 116 for connecting a hot water tap, and a dropping pipe 56 connected to a dropping circuit 58 to the bathtub.

  The pre-branch pipe 54 is provided with a flow rate control valve (hot water supply flow rate control valve) 60, and the amount of hot water generated by the hot water / mixing valve 52 is controlled by the flow rate control valve 60. 100 is controllable. The flow rate control valve 60 is configured to shut off the supply of hot water to the hot water supply pipe 55 and the dropping pipe 56 by closing the valve (making it fully closed).

  The drop-in circuit 58 into the bathtub is provided with a pouring flow sensor 61, a pouring solenoid valve 62, and a check valve 63, and the tip thereof is configured to merge with the upstream side of the return pipe 12. As described above, when the port on the bypass piping 43 side of the three-way valve 42 and the port on the circulation pump 39 side are in communication with each other, the hot water heated by the plate heat exchanger 45 is heated by opening the hot water solenoid valve 62. Supplied to the bathtub.

  In the figure, reference numeral 69 is a can thermistor for detecting the temperature of the hot water from the plate heat exchanger 45, reference numeral 66 is an incoming water temperature sensor for detecting the temperature of clean water entering the water supply pipe 50, and reference numeral 67 is a hot water tap. The hot water thermistor which detects the hot water temperature of the hot water is shown, and the reference numeral 68 indicates the incoming water flow rate sensor which detects the incoming water flow rate to the water supply pipe 50.

  Thus, in the hot water supply / heating heat source machine 1 configured as described above, the operation of each part of the hot water supply / heating heat source machine 1 is controlled by the control means 100, and the functions of hot water supply, heating, and bathing are realized.

  Here, the control means 100 is a control device built inside the front door 101a (see FIG. 2) of the housing 101, and is equipped with a program for controlling the operation of each part of the hot water supply / heating heat source unit 1. A microcomputer is the main part. The microcomputer controls operation information from the operating device (remote controller) 200 (for example, operation information of hot water supply set temperature) and sensor detection information from various sensors in each control of hot water supply, heating, and bathing. Based on the above, each part of the hot water supply / heating heat source machine is controlled.

  And in this embodiment, this control means 100 detects the abnormality in conduction | electrical_connection of the primary side in the said plate heat exchanger 45, and a secondary side in addition to such general control programs, such as hot water supply, heating, and bathing. And a program functioning as a safe operation command means for performing a predetermined safe operation when an error such as a conduction abnormality is detected.

  Therefore, in the following, detection of conduction abnormality and safe operation of the plate heat exchanger 45 will be described.

  In the present embodiment, the control means 100 functioning as the continuity abnormality detection means is configured such that the primary side and the secondary side of the plate heat exchanger 45 are based on the detection state of the liquid level detection electrode 35 provided in the reserve tank 20. Detect continuity abnormality. This is because, when the plate heat exchanger 45 is cracked and the primary side and the secondary side of the heat exchanger 45 are in a conductive (short-circuited) state, the pressure on the primary side increases. As a result, the reserve tank 20 Since the liquid level rises, the conduction abnormality of the plate heat exchanger 45 is detected from this liquid level rise.

  By the way, if it is set as the structure which detects the conduction | electrical_connection abnormality of the plate heat exchanger 45 based on the liquid level in the reserve tank 20 in this way, the heat medium at the time of construction of the hot water supply heating heat source machine 1 (at the time of heating trial operation) or use start When replenishing the heat medium to the reserve tank 20, such as during replenishment (during a water-filled operation), there is a risk of overfilling the heat medium by forgetting to open the above-described open / close plug 32, There is a possibility that the conduction abnormality of the plate heat exchanger 45 is erroneously detected.

  Therefore, in this embodiment, in order to distinguish the rise in the liquid level due to such an artificial construction failure and the rise in the liquid level due to the damage of the plate heat exchanger 45, the procedure of the plate heat exchanger 45 is performed according to the procedure shown in FIG. Detecting continuity abnormality.

  Here, prior to the description, an outline of the procedure of the heating trial operation and the water-filled operation will be described. The heating trial operation is normally performed by a worker (construction contractor) when the hot water supply heat source unit 1 is newly installed. The procedure of the heating trial operation is as follows: (1) The pressure adjusting valve (radiator cap) 21 attached to the heating heat medium tank 15 is removed and the heat medium is injected into the heating heat medium tank 15. (2) When the heating medium tank 15 is full, the pressure regulating valve 21 is returned to its original position, a trial operation switch (specifically, a switch provided inside the front door 101a) is pushed, and the circulation pump 19 for heating is used. Is activated to remove air from the heating circuit A. (3) Open the drain port 30 for restricting the liquid level (specifically, the opening / closing plug 32) and replenish the reserve tank 20 with the heat medium so that the heat medium does not overflow from the drain port 30. (4) Close the drain port 30 for restricting the liquid level (specifically, the opening / closing plug 32), press the trial operation switch again to stop the circulation pump 19, and then turn on the heating switch (not shown) of the operating device 200. ) To start the heating operation and vent the air in the heating circuit A. (5) It is carried out by a procedure of injecting the heat medium up to the upper limit position of the reserve tank 20 (the height position of the drain port 30) while the heating circuit A is heated.

  On the other hand, the water-filled operation is an operation mode in which the worker or the user himself / herself replenishes the reserve tank 20 when the amount of the heat medium in the heating circulation circuit A is reduced. It is executed by a water-filled driving operation that is an operation under the hidden mode of the operating device 200. And by this hydration operation, the control means 100 will be in the same state as when the trial operation switch was pushed in the above-described heating trial operation procedure (2), and the following procedure is the heating trial operation switch in step (4). The heating medium is replenished by the same procedure as described above only when the operation is changed to the water-filled operation.

  Then, the control means 100 determines whether or not the heating medium replenishment operation to the reserve tank 20 has been performed, as shown in step S1 of FIG. It is detected by judging.

  And control means 100 will reset a timer (timer means) using an internal clock, and will start a timer, if either operation of heating trial operation or water-fed operation operation is received next. This timer is a timer for setting a period for determining an artificial construction failure described later, and whether or not a predetermined time T1 (for example, 72 hours) has elapsed since the operation of the heating trial operation or the water filling operation was received. Is measured (see step S3 in FIG. 5).

  Then, before the timer expires, that is, when the predetermined time T1 has not elapsed since either the heating trial operation or the water-tight operation, the control means 100 detects the liquid level detection electrode 35. The state is counted at a predetermined counting cycle T2 (2 seconds in the illustrated example) (see step S4 in FIG. 5).

  Here, the control means 100 acquires the status of the liquid level detection electrode 35 (whether or not the liquid level is detected) periodically (for example, every second), and detects the liquid level according to the counting cycle T2 described above. It is counted whether or not the electrode 35 detects the liquid level. That is, if the liquid level detection electrode 35 detects the liquid level, the internal counter (counting means) is set to “+1”, and if the liquid level is not detected, the counter is set to “− (1/1800)”. In addition, as for the increase / decrease of the counter here, the subtraction is performed in units smaller than the addition, as will be described later, since the error is determined based on this counter value, the error determination is easily avoided. This is to prevent it.

  In this counting, the control means 100, when the count by the counter increases or decreases beyond a predetermined value (for example, “2 counts”), the non-volatile storage means (for example, The count value after the increase / decrease is stored in the EEPROM).

  Then, as shown in step S5 of FIG. 5, the control means 100 compares the counted value with a predetermined specified value X, and the count value reaches the specified value X (specified value X = 30 in the illustrated example). Whether or not (count determination means).

  And if this judgment is negative, it will return to FIG.5 step S3, and if it is affirmative, the control means 100 will be replenished with the heat medium to the reserve tank 20 excessively (The liquid level restriction | limiting by the said drain port 30) (Artificial construction failure replenished beyond the upper limit) and notifying the outside through a notification means such as a display unit or a voice output unit of the operation device 200 and instructing the execution of a predetermined safe operation (FIG. (See 5 step S6).

  Note that step S6 in FIG. 5 is configured not to be executed during the trial heating operation. That is, in the above-described heating trial operation procedure, until the second heating trial operation switch is operated (see (4) in the above procedure), only counting by the counting means is performed, and error notification and safety operation are not performed. Configured as follows.

  On the other hand, after the timer expires, that is, when a predetermined time T1 has elapsed since either the heating trial operation or the water-tight operation was performed (Yes in step S3 in FIG. 5), the control means 100 The count cycle for counting the detection state of the liquid level detection electrode 35 is set to a cycle T3 (20-second cycle in the illustrated example) longer than the above-described count cycle T2, and the detection state of the liquid level electrode is counted according to the count cycle T3. (See step S7 in FIG. 5).

  At that time, as a specified value to be compared with the counted value, the control means 100 uses a specified value Y larger than the specified value X (specified value Y = 5400 in the illustrated example) and counts the counted value. Is determined whether or not the predetermined value Y has been reached (see step S8 in FIG. 5).

  And if this judgment is negative, it will return to FIG.5 step S3, and if it is affirmation, it will determine with the conduction abnormality of the plate heat exchanger 45, and that will be indicated to the display part of the operating device 200, an audio | voice output part, etc. Notifying the outside through the notifying means, and orders the execution of a predetermined safe operation (see step S9 in FIG. 5).

  As described above, in this embodiment, two types of counting cycles T2 and T3 are used as the cycle for counting the detection state of the liquid level detection electrode, and two types of specified values X and L are used as the specified values to be compared with the counted values. Using Y, these are properly used depending on whether or not a predetermined time T1 has elapsed since the supply of the heat medium, thereby discriminating between artificial work defects and abnormal conduction of the plate heat exchanger 45. Has been.

  In other words, immediately after replenishing the heat medium, by monitoring the state of the liquid level detection electrode 35 using a short count cycle T2 and a small specified value X, an artificial work failure (overheating medium is excessively found) is detected early. After the predetermined time T1 has passed without any artificial work defects being found, by monitoring the state of the liquid level detection electrode 35 using a long counting cycle T3 and a large specified value Y, The plate heat exchanger 45 is configured so as to reduce the possibility of erroneous detection of a conduction abnormality.

  Next, the safe operation by the control means 100 will be described. In the present embodiment, when any one of artificial work defects or abnormal conduction of the plate heat exchanger 45 is detected, the control means 100 performs all modes of operation (hot water supply, heating, and bathing operation). While prohibiting, it sets so that the flow control valve 60 provided downstream of the outlet side of the secondary side of the plate heat exchanger 45 may be fully closed. As a result, the hot water supply, heating, and bathing functions are stopped, and the supply of hot water to the hot water supply pipe 55 and drop-in pipe 56 is shut off, and hot water mixed with a heat medium is supplied from the hot water tap or the circulation adapter of the bathtub. The outflow is stopped.

  Here, the reason why the operation of all modes is uniformly prohibited as the safe operation is that it cannot be completely denied that the plate heat exchanger 45 may be damaged before the predetermined time T1 elapses.

  In addition, about this safe operation | movement, a setting change is possible suitably. For example, the content of the safe operation can be changed depending on whether or not the predetermined time T1 has elapsed. As described above, although it cannot be completely denied that the plate heat exchanger 45 can be damaged even before the predetermined time T1 has elapsed, such a situation is rarely empirically. If the predetermined time T1 is not yet elapsed, the safety measures can be relaxed so that only heating can be used, or the safety operation is not performed only by notification.

  Finally, the above-described error notification and safe operation canceling method will be described. In the present embodiment, the error notification and the release of the safety operation are configured to be released by any one of the operation of the heating trial operation switch or the water-filled operation. This is because these operations cannot be performed consciously (the heating trial operation switch is located inside the front door 101a of the housing 101, so it is necessary to open the door, and the operation of the water-filled operation is performed by the operation device 200. This is because hidden mode requires operations other than normal switch operation), and by requesting such operations, it is possible to prevent the user from easily releasing error notifications and safe operations. It can be canceled even by the water-filled operation by the user's judgment without opening the front door 101a of the hot water supply / heating heat source unit 1 until the worker arrives after the user recognizes the error. This is because the safe operation can be canceled.

  In this regard, in the present embodiment, when the power of the hot water supply / heating heat source machine 1 is reset (returned on), for example, during counting by the counter or after error notification, the control means (counting means) 100 Is configured to read the count value stored in the storage means and restart counting, and the timer is configured to start measurement from the beginning (from power-on) Is done. As a result, even if the user resets the power supply, the counter value is not lost. If the error is being notified, the error notification is resumed even after the power is turned on again.

Embodiment 2
Next, a second embodiment of the present invention will be described with reference to FIGS. The embodiment shown in FIGS. 6 and 7 shows a case where the hot water supply / heating heat source unit 1 shown in Embodiment 1 is equipped with a hermetic plug for switching the heating circulation circuit from a semi-hermetic type to a hermetic type. Therefore, since the structure other than the sealing plug 70 is the same as that of the first embodiment described above, the parts having the same configuration are denoted by the same reference numerals and description thereof is omitted.

  The hermetic plug 70 is a plug for switching the heating circulation circuit from a semi-hermetic type to a hermetic type, and this plug 70 is replaced by the heating heat medium tank 15 instead of the pressure regulating valve 21 attached to the heating heat medium tank 15. It is attached to. That is, the sealing plug 70 has a structure that can be mounted on the mounting portion 22 of the heating heat medium tank 15.

  The hermetic plug 70 is provided with a pressure relief valve (safety valve) 71. When the inside of the heating heat medium tank 15 exceeds a predetermined pressure, the pressure relief valve 71 is operated, and the inside of the heating heat medium tank 15 is provided. The heat medium is configured to be guided to a pipe 72 connected to the outlet side of the pressure relief valve 71.

  In this embodiment, when the hot water supply / heating heat source unit 1 is used as a sealed type using the sealed plug 70, the pipe 72 provided in the pressure relief valve 71 is connected to the reserve tank 20. That is, when the pressure relief valve 71 is operated, the heat medium in the heating heat medium tank 15 is connected so as to be guided into the reserve tank 20.

  FIG. 6 shows a configuration in which this pipe 72 is connected to the third drain port (liquid level limited drain port) 30 of the reserve tank 20, that is, the open / close plug 32 of the water pipe 31 communicating with the drain port 30 is removed. 7 shows a case where the pipe 72 is connected, and FIG. 7 shows a configuration in which the pipe 72 is connected to the heat medium replenishing port 26 of the reserve tank 20 with the open / close stopper 32 closed, that is, the pipe 72 is heated. The case where it mounts in the opening part 27a for medium replenishment is shown.

  In this way, by connecting the outlet side of the pressure relief valve 71 and the reserve tank 20, even when the hot water supply / heating heat source unit 1 is used as a hermetically sealed type, similar to the first embodiment described above, An abnormal conduction of the plate heat exchanger 45 can be detected by the control means 100, and when these errors are detected, the same safe operation can be performed.

  In relation to this, the counting cycles T2 and T3 and the specified values X and Y described above change depending on whether the hot water supply / heating heat source unit 1 is used in a sealed type or a semi-sealed type. Are set with counting periods T2 and T3 and prescribed values X and Y for the sealed type and the semi-sealed type, respectively. And the control means 100 is provided with a type setting means (for example, a connector for selecting an operator) for setting whether the hot water supply / heating heat source unit 1 is used in a sealed type or a semi-closed type. The counting periods T2 and T3 and the prescribed values X and Y are switched according to the setting of the model setting means.

  In addition, embodiment mentioned above shows the preferred embodiment of this invention, Comprising: This invention is not limited to these, A various design change is possible within the range.

  For example, in the above-described embodiment, the case where oil such as kerosene is used as the fuel is shown. However, the present invention uses a part of the heating heat medium as the heat source of the liquid-liquid heat exchanger for general hot water supply. If it is a machine, it is possible to apply also to what uses gas as a fuel, and uses an electric heater as a heat source.

  In the above-described embodiment, the case where the open / close plug 32 that manually switches between closing / opening of the pipe line is used as the pipe line opening / closing means provided in the liquid level restriction drain port 30 of the reserve tank 20. The path opening / closing means may be in the form of an electromagnetic valve that can be operated by the operating device 200 or the like, for example, as long as it can switch between closing and opening of the pipeline.

  In the above-described second embodiment, the case where the pipe 72 connected to the pressure relief valve 71 of the hermetic plug 70 is connected to the liquid level limiting drain 30 or the heating medium replenishment port 26 of the reserve tank 20 is shown. 72 and the reserve tank 20 should just be connected, and the piping 72 can also be connected to another drain outlet (for example, drain outlet 28).

  Further, in the above-described embodiment, as an error notification and safe operation canceling method, either a heating trial operation switch operation or a hydrostatic operation operation is a condition, but it can be canceled by a simpler method. It is also possible to configure. For example, on the condition that the liquid level detection electrode 35 does not detect the liquid level, it is possible to make it possible to release it by a normal operation of the operating device 200 (for example, operation of an operation switch). It can also be canceled by power reset.

It is a schematic block diagram of the hot water supply heating heat source machine concerning this invention. It is a figure which shows the external appearance of the hot-water supply heating heat source machine, FIG. 2 (a) has shown the top view of the hot-water supply heating-heat source machine, and FIG.2 (b) has shown the front view. It is an assembly drawing which shows the example of arrangement | positioning of the main components of the hot-water supply heating heat source machine. It is explanatory drawing which shows the structure of the reserve tank of the hot-water supply heating heat source machine, FIG.4 (a) is a top view of a reserve tank, FIG.4 (b) is a front view of the reserve tank, FIG.4 (c) is FIG. The side view of the reserve tank is shown, respectively. It is a flowchart which shows the detection procedure of the conduction | electrical_connection abnormality of the plate heat exchanger in the hot-water supply heating heat source machine. It is the front view which showed the example of mounting | wearing with the airtight plug to the hot-water supply heating heat source machine. It is the front view which showed the other attachment example of the sealing plug to the hot-water supply heating heat source machine.

Explanation of symbols

1 Hot water heater / heat source machine 2 Combustion can (heating means)
DESCRIPTION OF SYMBOLS 3 Combustion chamber 4 Heat exchanger part 9 Heat medium storage part 15 Heating heat medium tank 20 Reserve tank 45 Plate heat exchanger (liquid-liquid heat exchanger) for general hot water supply
100 Control means A Heating circulation circuit B Reheating circulation circuit C Hot water supply circulation circuit

Claims (8)

A part of the heating medium stored in the heating medium reservoir is circulated to the primary side of the liquid-liquid heat exchanger with a circulation pump, and the water supplied to the secondary side is heated using the supply water pressure. A hot water supply / heating heat source machine equipped with a hot water supply / circulation circuit for performing instantaneous hot water supply, and a liquid-liquid heat exchanger provided with a liquid level detection electrode for detecting the liquid level of the heating medium in a reserve tank of the heating circulation circuit In what detects continuity abnormality of
The control means includes a timer means for measuring whether or not a predetermined time has elapsed since the operation of the heating trial operation or the water filling operation was received, and a counting means for counting the detection state of the liquid level detection electrode at a predetermined counting cycle. A count determination unit that determines whether the count value of the count unit has reached a predetermined specified value; and a notification unit that notifies the determination result of the count determination unit,
Until the timer means detects the lapse of a predetermined time, the count determining means makes a determination with the specified value of the counting means as a first specified value, and if the count value becomes equal to or greater than the first specified value, It is determined that it is a general construction failure and is notified by the notification means,
After the timer means detects the elapse of a predetermined time, the count determining means determines the count value of the count means as a second specified value that is larger than the first specified value, and the count value is A hot water supply / heating heat source machine comprising a control configuration for determining that the liquid-liquid heat exchanger is abnormally connected when the second specified value is exceeded or not, and notifying by the notification means. A part of the heating medium stored in the heating medium reservoir is circulated to the primary side of the liquid-liquid heat exchanger with a circulation pump, and the water supplied to the secondary side is heated using the supply water pressure. A hot water supply / heating heat source machine equipped with a hot water supply / circulation circuit for performing instantaneous hot water supply, and a liquid-liquid heat exchanger provided with a liquid level detection electrode for detecting the liquid level of the heating medium in a reserve tank of the heating circulation circuit In what detects continuity abnormality of
The control means includes a timer means for measuring whether or not a predetermined time has elapsed since the operation of the heating trial operation or the water filling operation was received, and a counting means for counting the detection state of the liquid level detection electrode at a predetermined counting cycle. A count determination unit that determines whether the count value of the count unit has reached a predetermined specified value; and a notification unit that notifies the determination result of the count determination unit,
Until the timer means detects the elapse of a predetermined time, the count determination means makes a determination by setting the counting period in the counting means as a first period and setting the specified value of the counting means as a first specified value. In addition, when the count value is equal to or greater than the first specified value, it is determined as an artificial construction failure and notified by the notification means,
After the timer means detects the elapse of a predetermined time, the counting period in the counting means is set to a second period longer than the first period, and the specified value of the counting means is set to be greater than the first specified value. The second determining value is determined by the count determining means, and when the count value becomes equal to or greater than the second specified value, it is determined that the liquid-liquid heat exchanger is abnormally connected and is notified by the notifying means. A hot water supply / heating heat source machine comprising a control configuration.   The control means has a control configuration for storing the increased / decreased count value in a nonvolatile storage means when the count by the count means exceeds or exceeds a predetermined value, and the hot water supply / heating heat source machine is turned on again. Sometimes, the timer means starts measuring the predetermined time from when the power is turned on again, the counting means reads the count value stored in the storage means and restarts counting, and the count judging means restarts counting The hot water heating / heating source according to claim 1 or 2, wherein a comparison with the specified value is made based on a value.   The said control means is provided with the safe operation command means to perform predetermined | prescribed safe operation, when it determines with the said artificial construction defect or the conduction | electrical_connection abnormality of a liquid-liquid heat exchanger. The hot water supply / heating heat source machine according to any one of 3 above.   The hot water supply / heating heat source machine according to claim 4, wherein the safe operation command means executes a process of stopping the hot water of the general hot water supply as the safe operation.   The said control means is equipped with the control structure which cancels | releases determination with the said artificial construction defect by predetermined | prescribed operation of the operating device of the hot water supply heating heat source machine, The one in any one of Claim 1 to 5 characterized by the above-mentioned. Hot water heater / heat source machine.   The control means includes type setting means for setting whether the heating circulation circuit is a semi-hermetic type or a hermetic type, and according to the setting of the type setting means, the counting period of the counting means and the count determination The hot water heating / heating source according to any one of claims 1 to 6, wherein the specified value of the means is switched.   The hot water heating / heating source according to any one of claims 1 to 7, wherein the control means does not notify the determination result of the count determination means in the notification means during the execution of the heating trial operation.

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