JPH09257249A - Combustion instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combustion instrument, capable of detecting the short-circuit abnormality of respective temperature detecting means easily, in the combustion instrument equipped with a plurality of combustion units. SOLUTION: A combustion instrument is provided with temperature detecting means 9, 23, corresponding to combustion units, temperature detecting means 33a, 33b, detecting the temperatures of respective matters to be heated from the detecting signals of respective temperature detecting means 9, 23, and an operation control means, controlling respective combustion units based on the detecting temperatures of respective detecting means 33a, 33b. The detecting means 33a, 33b are arranged so as to be neighbored. When one of the combustion units is effecting combustion operation and the other combustion unit is stopped, an abnormality deciding means 35 decides that it is short-circuit abnormality between respective detecting means 33a, 33b mutually when the detecting temperature of the detecting means 33a is higher than a specified reference value. The abnormality deciding means 35 decides that it is the short-circuit abnormality when the detecting temperatures of the detecting means 33a, 33b are same value. The abnormality deciding means 35 decides that it is the short-circuit abnormality when the detecting temperature of the detecting means 33a is raised or lowered in accordance with the detecting temperature of the detecting means 33b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device having a plurality of combustion parts.

[0002]

2. Description of the Related Art Conventionally, as in a hot water supply combustion section for a gas water heater that supplies hot water to a kitchen, a washroom, a bathtub, etc., and a bath section combustion section for boiling up the hot water supplied to the bathtub, A combustion device including a plurality of combustion units is known.

In such a combustion device, a temperature sensor for detecting the temperature of the hot water heated in each combustion section is provided corresponding to each of the combustion sections, and the detection signal of each temperature sensor indicates the temperature. The temperature of the hot water heated in each combustion unit is detected from the signal input to the detection circuit provided corresponding to the sensor. The combustion device controls the combustion operation of the plurality of combustion units by one operation control device according to the hot water temperature detected by each detection circuit from the detection signal of each temperature sensor. Here, the operation control device controls the heating amount of each combustion unit so that the hot water temperature detected by each detection circuit matches the set temperature set by the user through the setting device or the like.

In the above-mentioned combustion equipment, each temperature sensor is provided in each hot water pipe to be heated in the corresponding combustion section, and therefore is separated from each other. However, each detection circuit corresponding to each temperature sensor has the above-mentioned operation control. They are provided adjacent to each other in a controller with the device. By doing so, circuits having similar functions are collectively arranged at a specific place in the controller, space can be effectively used, and the operation control device can be operated from each detection circuit in the controller. Wiring to and the maintenance of each detection circuit can be easily performed.

However, in the combustion equipment, since the detection circuits are provided adjacent to each other, the connectors for inputting the detection signals of the temperature sensors to the detection circuits are in contact with each other, and the detection circuits and , Splashing water between conductors that input the hot water temperature detected by each detection circuit to the operation control device,
Short circuit failure may occur due to adhesion of solder scraps,
When the short-circuit abnormality occurs, the operation control device may not be able to accurately grasp the temperature of the hot water heated in each of the combustion parts, which may cause an abnormality in the combustion operation.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above inconveniences, and in a combustion apparatus having a plurality of combustion sections, when an abnormality in combustion operation occurs due to a short circuit abnormality between temperature detecting means, An object of the present invention is to provide a combustion device that solves the inconvenience caused by a short circuit abnormality.

[0007]

In order to achieve the above object, the first aspect of the combustion apparatus of the present invention is provided with a plurality of combustion sections and is provided corresponding to each combustion section. A plurality of temperature detecting means for detecting the temperature of the heated object, and a plurality of temperature detecting means provided corresponding to each temperature detecting means for detecting the temperature of each object from the detection signal of each temperature detecting means. And an operation control unit that controls the combustion operation of each combustion unit based on the temperature of each object to be heated detected by each temperature detection unit, and the plurality of temperature detection units are arranged adjacent to each other. In one of the combustion equipment, when one combustion section is in combustion operation and the other combustion section is in combustion operation, it is detected by the temperature detection means corresponding to the combustion section in which combustion operation is stopped. Temperature is higher than the predetermined reference value Wherein said providing the abnormality determining means determines that short-circuit malfunction between the temperature measurement means to each other when.

In a combustion apparatus having a plurality of combustion sections, when there are a combustion section that is in operation and a combustion section that is not in operation, the temperature detecting means corresponding to the combustion section in operation heats the combustion section. Although the high temperature of the heated object is detected, when the temperature detecting means corresponding to the combustion part that is not operating does not heat the heated object by the combustion part, Such high temperature is not detected.

The abnormality determining means of the combustion equipment according to the present invention is based on the above-mentioned principle. In the first aspect, one combustion section is performing combustion operation and the other combustion section is stopping combustion operation. When it is detected that the temperature detected by the temperature detecting means corresponding to the combustion section in which the combustion operation is stopped is higher than the reference value, it corresponds to the combustion section in which the combustion operation is stopped. As a result of the temperature detection means being short-circuited to the temperature detection means corresponding to the combustion part performing the combustion operation,
It is determined that the short circuit is abnormal, assuming that the temperature that should not be detected is detected. As the reference value, for example, a set temperature or the like set by the user with respect to the combustion unit performing the combustion operation can be used.

The second aspect of the combustion device of the present invention is
In the combustion device, when one combustion section is performing combustion operation and the other combustion section is stopping combustion operation,
When the temperature detected by the temperature detection means corresponding to the combustion part in which the combustion operation is stopped is the same value as the temperature detected by the temperature detection means corresponding to the combustion part in the combustion operation, it is determined as a short circuit abnormality. It is characterized in that the abnormality determining means for performing is provided.

In the second aspect, when one combustion section is in combustion operation and the other combustion section is in combustion operation, the temperature corresponding to the combustion section in which combustion operation is stopped is performed. When the temperature detected by the detection means has the same value as the temperature detected by the temperature detection means corresponding to the combustion section performing the combustion operation, the temperature detection means corresponding to the combustion section stopped in the combustion operation is burned. As a result of short-circuiting to the temperature detecting means corresponding to the operating combustion section, it is determined that a short circuit has occurred, assuming that the same temperature is detected.

The third aspect of the combustion device of the present invention is
In the combustion device, when one combustion section is performing combustion operation and the other combustion section is stopping combustion operation,
When the temperature detected by the temperature detection means corresponding to the combustion section in which the combustion operation is stopped increases with the temperature detected by the temperature detection means corresponding to the combustion section in the combustion operation, a short circuit abnormality is generated. A feature is that an abnormality determination means is provided.

In the third aspect, when one combustion section is in combustion operation and the other combustion section is in combustion operation, the temperature corresponding to the combustion section in which combustion operation is stopped is performed. When the temperature detected by the detection unit rises with the temperature detected by the temperature detection unit corresponding to the combustion unit performing the combustion operation, the temperature detection unit corresponding to the combustion unit stopped in the combustion operation is As a result of short-circuiting to the temperature detecting means corresponding to the combustion part performing the combustion operation, it is determined that the detected temperature is high, and the short-circuit abnormality is determined.

Further, in a fourth aspect of the combustion apparatus of the present invention, in the combustion apparatus, when one combustion section is in combustion operation and the other combustion section is in combustion operation, combustion is performed. Short-circuit abnormality occurs when the temperature detected by the temperature detection means corresponding to the combustion section in which the operation is stopped decreases as the temperature detected by the temperature detection means corresponding to the combustion section in the combustion operation increases. It is characterized in that an abnormality judging means for judging is provided.

In the fourth aspect, when one combustion section is in combustion operation and the other combustion section is in combustion operation, the temperature corresponding to the combustion section in which combustion operation is stopped When the temperature detected by the detection means falls with the rise in temperature detected by the temperature detection means corresponding to the combustion part performing combustion operation, the temperature detection corresponding to the combustion part stopped in combustion operation As a result of the circuit short-circuiting to the temperature detection unit corresponding to the combustion section in which the combustion operation is performed, it is determined that the detected temperature is lowered, and the short-circuit abnormality is determined.

According to the combustion apparatus of the present invention in each of the above aspects,
By detecting the short circuit abnormality between the temperature detecting means as described above, it is possible to prevent the abnormality in the combustion operation caused by the short circuit abnormality.

In the stopped combustion section, the effect of the combustion operation remains as residual heat on the object to be heated, even immediately after the end of the combustion operation. For this reason, if a short circuit abnormality is detected between the temperature detection means at a time shortly after the end of the combustion operation, the temperature detection means corresponding to the combustion part in which the combustion operation is stopped detects the residual heat. There is a possibility that the abnormality determination means makes an erroneous determination upon detection.

Therefore, the abnormality determining means of each aspect of the combustion apparatus of the present invention is characterized in that when one combustion section carries out combustion operation, a predetermined time after the other combustion section finishes combustion operation, the above-mentioned temperature It is characterized in that a short circuit abnormality is detected between the detection means. By doing so, the abnormality determining means can reliably determine the short-circuit abnormality between the temperature detecting means regardless of the influence of the residual heat.

Further, in each aspect of the combustion apparatus of the present invention, the operation control means stops the combustion operation of each combustion section when the abnormality determination means determines that there is a short circuit abnormality between the temperature detection means. It is characterized by doing. By doing so, it is possible to prevent an abnormality in combustion operation due to a short circuit abnormality.

[0020]

Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 is a system configuration diagram showing an example of a combustion device of the present invention, FIG. 2 is an explanatory diagram showing an embodiment of a main part of FIG. 1, and FIGS. 3 to 5 are views of the combustion device of the present invention. 6 is a flowchart illustrating the operation of the abnormality determination means of each embodiment corresponding to the configuration shown in FIG. 6 is an explanatory view showing another embodiment of the main part of FIG. 1, and FIG. 7 explains the operation of the abnormality determining means of the embodiment corresponding to the configuration shown in FIG. 6 in the combustion equipment of the present invention. It is a flowchart.

As shown in FIG. 1, the combustion apparatus of the present embodiment is a composite hot water supply system having a plurality of combustion parts, 1 is a main hot water supply passage, and 2 is a hot water supply for a bath A which is a hot water supply object. 2 is a sub hot water supply passage, 3 is a hot water supply combustor, and 4 is a bath tub combustor.

The main hot water supply passage 1 has its upstream side connected to a water supply pipe (not shown), and its downstream end connected to a hot water supply tap 5 in a kitchen or a washroom. The hot water supply combustion unit 3 is the main hot water supply passage 1
Is provided in the middle of the
The water flowing through the main hot water supply passage 1 is heated via the hot water supply heat exchanger 6. In this case, the hot water supply combustion unit 3
Heats the hot water supply heat exchanger 6 with a gas burner (not shown), for example.

On the upstream side of the hot water supply heat exchanger 6 in the main hot water supply passage 1, the amount of water flowing through the main hot water supply passage 1 (flow rate per unit time) and the presence / absence of the water flow are detected. First
A water amount sensor 7 is provided, and a hot water amount servo 8 for adjusting the amount of hot water supply and a hot water temperature sensor 9 for detecting the temperature of hot water flowing out from the hot water supply heat exchanger 6 are provided downstream of the hot water supply heat exchanger 6.
Are provided. Reference numeral 10 denotes a bypass solenoid valve provided in a bypass passage 11 that connects an upstream side portion of the hot water supply heat exchanger 6 of the main hot water supply passage 1 and a downstream side portion of the hot water supply heat exchanger 6.

The sub hot water supply passage 2 is divided from the main hot water supply passage 1 at the hot water temperature sensor 9 to control the solenoid valve 12, which is an on-off valve, and the amount of water flowing through the sub hot water supply passage 2 (flow rate per unit time). The second water amount sensor 13 for detection, the hopper 14, the check valve 15, the three-way valve 16 and the circulation path 17 for circulating the hot water in the bath A are connected in order to the bath A.

The circulation passage 17 is composed of a forward passage 17a and a return passage 17b which are respectively led out from the three-way valve 16, and the forward passage 17a and the return passage 17b are circulated to a hot water supply port 18 formed in a side wall portion below the bath A. It is connected via a metal fitting 19. And, the combustion section 4 for the bathtub has a forward path 17a.
The bathtub heat exchanger 20 is provided in the middle of the above, and the water flowing through the circulation path 17 is heated via the bathtub heat exchanger 20.

In the outward path 17a, between the three-way valve 16 and the bath heat exchanger 20, a circulation pump 21, a water flow switch 22 for detecting the presence or absence of water passing through the circulation path 17, and a hot water temperature in the bath A. A bath temperature sensor 23 for detecting is provided.
A water level sensor 24 for detecting the water level in the bathtub A is provided on the return path 17b.

The bath tub combustor 4 heats the tub heat exchanger 20 by a gas burner (not shown) as in the hot water supply combustor 3, for example, to boil the hot water in the bath A. At this time, the circulation pump 21 circulates the circulation path 17
The hot water in the bathtub A circulating through the bathtub is heated via the bathtub heat exchanger 20. Further, the water level sensor 24 is
It is composed of a pressure sensor that detects the water level inside as a hydrostatic pressure corresponding to the water level.

Further, in FIG. 1, reference numeral 25 is a controller for controlling the operation of the hot water supply combustion units 3, 4, 26 is an operating unit for the user to instruct the controller 25 to set various operation menus, and 27 is a controller. It is a display for notifying the user of various operation information of the hot water supply device, such as the set hot water temperature in the main hot water supply passage 1 and error information.

The controller 25 includes a CPU, a RAM and an R
An operation control device 28 configured by using a microcomputer including an OM or the like is provided. The operation control device 28 is
The first water amount sensor 7, the hot water temperature sensor 9, the second water amount sensor 13, the water flow switch 22, the output of the bath water temperature sensor 23 and the water level sensor 24, and the setting instruction data and the like by the operation device 26 as input data, the ROM. According to the programs stored in the hot water supply combustion unit 3, the bath tub combustion unit 4, the hot water amount servo 8, the bypass solenoid valve 10, the solenoid valve 12,
In addition to controlling the operation of the circulation pump 21, the display 27, etc., it performs various kinds of arithmetic processing, detection of a short-circuit abnormality related to the hot water temperature sensor 9 and the bath water temperature sensor 23, which will be described later, and the like.

Further, in the operation device 26, by operating a switch (not shown) provided therein, "automatic hot water operation", "automatic hot water operation", "automatic boiling operation"
It is possible to set various operation menus of the hot water supply device to the controller 25, and input the set hot water temperature in the main hot water supply passage 1, the set water level of the bathtub A, the set hot water temperature of the bathtub A, etc. to the controller 25. I am trying.

Further, the display 27 can display the set hot water temperature in the main hot water supply passage 1, the set water level in the bathtub A, the set hot water temperature in the bathtub A, or various error information under the control of the controller 25.

Next, referring to FIG. 2, the tap water temperature sensor 9 and the bath water temperature sensor 23 are respectively connected to the connectors 31a and 31a.
It is connected to the connector section 32 in the controller 25 via 31b, and is further connected to the detection circuits 33a and 33b for detecting the respective hot water temperatures from the detection signals of the hot water temperature sensor 9 and the bath water temperature sensor 23. Detection circuits 33a, 3
3b are directly connected to the connectors 31a and 31b, respectively, and are arranged adjacent to each other in the controller 25. Further, the detection circuits 33a and 33b have fixed resistors R _a ,
R _b is connected, and fixed resistors R _a and R _b are connected to each other.

Then, in the controller 25 shown in FIG.
The conductor 34a arranged between the detection circuit 33a and the fixed resistance R _a, and the conductor 34b arranged between the detection circuit 33b and the fixed resistance R _b are connected to the operation control device 28 and connected to the detection circuit 33a. It detected temperature T ₂ and also detection circuit 33b and a thermistor incorporated in the fixed resistor R _b tub water from the voltage division ratio of the temperature sensor 23 of a thermistor and a fixed resistor R _a and hot water temperature sensor from partial pressure ratio of 9 incorporated The temperature T ₁ detected by the sensor is read.

The operation control unit 28 also includes a connector 31.
a, 31b, detection circuits 33a, 33b, conductors 34a, 3
An abnormality determining unit 35 for detecting a short circuit abnormality of 4b is provided. The abnormality determining means 35 has a sufficiently low residual heat of hot water due to heating of the hot water supply combustion unit 3 or the bathtub combustion unit 4 after a predetermined time after the combustion operation of the hot water supply combustion unit 3 or the bathtub combustion unit 4 is completed. And a timer 36 for measuring the time until the temperature becomes lower than the minimum set temperature set by the operating device 26.
It is connected to the.

Next, the operation of the combined hot water supply system of this embodiment will be described.

First, the basic hot water supply operation of this combined hot water supply system will be described.

For example, when the user opens the hot water supply tap 5 to which the main hot water supply passage 1 is connected and starts the water flow in the main hot water supply passage 1, the fact that the water is supplied is indicated by the first water quantity sensor 7. The operation controller 28 recognizes the output.

At this time, the operation control device 28 operates the hot water supply combustor 3 to heat the water flowing through the main hot water supply passage 1 toward the hot water tap 5. During this heating, the operation control device 28 determines the hot water discharge temperature based on the detection data of the water flow rate and the hot water temperature of the main hot water supply passage 1 obtained from the first water amount sensor 7 and the hot water temperature sensor 9, respectively. The heating amount of the hot water supply combusting unit 3 is controlled so as to match the set hot water temperature set by. As a result, hot water is supplied to the hot water tap 5 at the set hot water temperature.

Further, for example, the user operates the operation unit 26 to
When the "automatic hot water operation" is set and instructed, the operation control device 2
8 is a solenoid valve 12 of the sub hot water supply passage 2 based on the setting instruction.
To start water flow from the main hot water supply passage 1 to the sub hot water supply passage 2, and further activate the hot water supply combustion section 3 in the same manner as in the case of hot water supply to the hot water tap 5, The water flowing in the sub hot water supply passage 2 is heated by the hot water supply combustion unit 3 in the main hot water supply passage 1 so as to reach the preset hot water discharge temperature. At this time, the hot water that is heated by the hot water supply combustion unit 3 and flows through the sub hot water supply passage 2 is
Hot water is supplied to the bathtub A through both the outward path 17a and the return path 17b of the circulation path 17 (so-called both transportation). In this case, the operation control device 28 basically sets the water level in the bathtub A by operating the controller 26 while closing the solenoid valve 12 appropriately and monitoring the water level in the bath A by the output of the water level sensor 24. The amount of hot water required to reach the set water level is detected in stages. Then, the electromagnetic valve 12 is appropriately opened and closed so that the integrated amount of hot water supply to the bathtub A grasped by the output of the second water amount sensor 13 is the required hot water amount, and hot water is supplied to the bathtub A. As a result, hot water up to the set water level is applied to the bathtub A. The details of such hot water beam operation are described in
Since the applicant of the present application has disclosed it in Japanese Patent Laid-Open No. 113245 and Japanese Patent Laid-Open No. 5-113246, detailed description thereof is omitted here. Further, the hot water supply to the bathtub A as described above is similarly performed when the hot water is added to the bathtub A.

Further, for example, the user operates the operation device 26 to
When the "automatic boiling operation" is instructed to be set, the operation control device 28 operates the circulation pump 21 and the bath combustion unit 4 in a state in which the solenoid valve 12 is closed based on the setting instruction. The hot water in the bathtub A is circulated in the circulation path 17 and heated by the bathtub combustion unit 4. in this case,
The operation control device 28 controls the heating amount of the bath combustion unit 4 so that the hot water temperature in the bath A detected by the hot water sensor 23 for the bath becomes the set hot water temperature set by the operating device 26.

Next, the operation of the abnormality determining means 35 in the hot water supply system of this embodiment will be described.

According to the hot water supply system shown in FIG. 1, as described above, the hot water tap 5 is opened, or the "automatic hot water beam operation",
Combustion operation for hot water supply by the hot water supply combustion unit 3 in the case of "automatic addition operation" and boiling of the hot water supplied to the bathtub A by the bathtub combustion unit 4 in the case of "automatic boiling operation". The combustion operation for this purpose can be performed independently. The combustion operation for hot water supply and the combustion operation for boiling can be performed by operating one of them and stopping the other, and the solenoid valve 12 is closed to perform "automatic boiling operation". While performing the above, both can be operated at the same time, as in the case of opening the hot water tap 5 to supply hot water to a kitchen or the like. However, the abnormality determination means 35 is used by the abnormality determining means 35 in the hot water supply system. It operates when one of the bath combustion units 4 is operated and the other is stopped.

Here, in the hot water supply system, as an example in which one of the hot water supply combustion section 3 and the bathtub combustion section 4 is operated and the other is stopped, the bathtub combustion section 4 is operated by "automatic boiling operation". A case where the combustion operation is performed and the hot water supply combustion unit 3 stops the combustion operation will be described.

First, the first embodiment of the abnormality determining means 35 will be described with reference to FIG.

In the present embodiment, the abnormality determining means 35 is activated along with the start of the combustion operation of the bath tub combustion section 4, but the start timing of the combustion operation of the bath tub combustion section 4 is already the hot water supply combustion section. There are cases where the combustion operation of No. 3 is completed and cases where the combustion operation of the hot water supply combustor 3 is still being performed.

First, when the combustion operation of the hot water supply combustor 3 has already been completed, as shown in FIG.
Immediately after the combustion operation of the above is finished, the timer 36 is activated, and when the combustion operation of the bathtub combustion unit 4 is started, the abnormality determination means 35 determines whether or not the time t ₁ measured by the timer 36 has elapsed. To do. When the time t ₁ has already passed, the hot water temperature detected by the hot water temperature sensor 9 is not affected by the residual heat due to the combustion operation of the hot water supply combustor 3, so the abnormality judging means 35 immediately judges the abnormality. Is performed. When the time t ₁ has not elapsed,
Since the influence of the residual heat due to the combustion operation of the hot water supply combustor 3 remains, the abnormality determination means 35 determines the abnormality after the time t ₁ has elapsed.

Next, when the combustion operation of the hot water supply combustion section 3 is still being performed, when the combustion operation of the bathtub combustion section 4 is started, the abnormality determining means 35 causes the hot water supply combustion section 3 to perform the combustion operation. It is determined whether or not has been completed. Immediately after the combustion operation of the hot water supply combustor 3 is completed, the timer 36 is activated, and after the lapse of time t ₁ , an abnormality determination is performed.
In this case, the abnormality determination means 35 does not perform the abnormality determination when the combustion operation of the hot water supply combustion unit 3 is continued.

The abnormality determination by the abnormality determining means 35 is performed by determining whether or not the hot water temperature T ₂ detected by the detection circuit 33a corresponding to the hot water temperature sensor 9 is higher than a predetermined reference value. Done. As described above, in the combustion operation of the bathtub combustion unit 4, the operation controller 26 sets the hot water temperature T _{1 of the} bathtub A detected by the detection circuit 33b from the detection signal of the hot water temperature sensor 23 for the bathtub by the operation unit 26. It is performed by controlling the heating amount of the bathtub combustion unit 4 so that the set hot water temperature T ₀ for the "automatic boiling operation" is set, and the set temperature T ₀ is used as the reference value, for example. To be

Further, at the time t ₁ , specifically, the hot water temperature detected by the hot water discharge temperature sensor 9 after the combustion operation of the hot water supply combustion unit 3 is finished is the hot water discharge during the combustion operation of the hot water supply combustion unit 3. It is the time from the temperature to the set temperature T _{0 of the} “automatic boiling operation” or lower.

At this time, the connectors 31a, 31 shown in FIG.
b, the detection circuit 33a, 33b, conductor 34a, if there is no abnormal short circuit 34b, the operation control unit 28 only detects the temperature T ₁ of the detection circuit 33b corresponding to the tub hot water temperature sensor 23 is "automatic water heating operation" Since the temperature is higher than the set temperature T ₀ and the temperature is not detected by the hot water temperature sensor 9, the detection temperature T ₂ of the detection circuit 33a corresponding to the hot water temperature sensor 9 is equal to or lower than the set temperature T ₀ of the "automatic boiling operation". Should be. On the other hand, if the cause short-circuit abnormality, the partial pressure ratio of a thermistor incorporated in the detection circuit 33a which is inputted from conductor 34a to the operation control unit 28 and the fixed resistance R _a is a value different from the normal value. Therefore, if the detected temperature T ₂ of the detection circuit 33a is equal to or higher than the set temperature (reference value) T _{0 of the} "automatic boiling operation", the abnormality determination means 35 will cause the connector 3 shown in FIG.
1a, 31b, detection circuits 33a, 33b, conductor 34
It can be determined that a short circuit abnormality has occurred in either of a and 34b.

Next, when the short circuit abnormality occurs, the operation control device 28 cannot accurately grasp the temperature of the hot water heated in the bath combustion unit 4. Therefore, if the abnormality determining means 35 determines that the short circuit abnormality has occurred, The combustion operation of the bath combustion unit 4 is stopped to prevent occurrence of abnormality in the combustion operation.

The second embodiment of the abnormality determining means 35 is, as shown in FIG. 4, a detection temperature T of the detection circuit 33a.
₂ is the same value as the detection temperature T ₁ of the detection circuit 33b (T ₂ =
When it is T ₁ ), it operates in the same manner as the abnormality determining means 35 of the first embodiment except that it is determined that the short circuit abnormality has occurred.

Further, in the third embodiment of the abnormality judging means 35, as shown in FIG. 5, the detection temperature T of the detection circuit 33b is detected.
Same as the abnormality determining means 35 of the first embodiment except that when the detection temperature T ₂ of the detection circuit 33a also increases with the increase of ₁ , it is determined that the short-circuit abnormality has occurred. Works.

Next, another embodiment of the controller 25 will be described with reference to FIG.

In the controller 25 of this embodiment, as shown in FIG. 6, a detection circuit 33a corresponding to the hot water temperature sensor 9 is directly connected to the connector 31a, and a fixed resistance R _a is connected to the detection circuit 33a. On the other hand, the detection circuit 3
3b has the same configuration as the controller 25 shown in FIG. 2 except that it is connected to the connector 31b via a fixed resistor _Rb . Further, according to the controller 25 shown in FIG. 6, in the controller 25 shown in FIG. 2, the conductor wire 34 disposed between the detection circuit 33a and the fixed resistance R _a.
a, a conductive wire 34b arranged between the fixed resistance _Rb and the detection circuit 33b is connected to the operation control device 28, and the detection circuit 3
The temperature T ₂ detected by the tap water temperature sensor 9 can be read from the partial pressure ratio between the thermistor incorporated in 3a and the fixed resistor _Ra, and the partial pressure ratio between the fixed resistor _Rb and the thermistor incorporated in the detection circuit 33b. The temperature T ₁ detected by the bath temperature sensor 23 can be read.

In the present embodiment, as described above, when the bathtub combustion unit 4 is performing the combustion operation by the "automatic boiling operation" and the hot water supply combustion unit 3 is stopped, for example, If abnormal short circuit occurs between the points a and B in FIG. 6 shows, a value division ratio is different from the normal value of the detection circuit 33a which is inputted from conductor 34a to the operation control unit 28 and the fixed resistance R _a Become. As a result, in operation control device 28, detection temperature T ₂ of detection circuit 33a corresponding to tap water temperature sensor 9 decreases as detection temperature T ₁ of detection circuit 33b corresponding to bath water temperature sensor 23 increases. .

Therefore, in the present embodiment, the abnormality determining means 3
5 indicates the detection temperature T ₁ of the detection circuit 33b as shown in FIG.
When the detection temperature T ₂ of the detection circuit 33a decreases with the rise of the above, it is determined that the short circuit abnormality has occurred.
The operation of the abnormality determining means 35 shown in FIG. 7 is the same as that of the abnormality determining means 35 of the first embodiment except the timing of determining the occurrence of the short circuit abnormality.

Further, in this embodiment, a short circuit abnormality occurs.
When detecting, the circuit constants of the detection circuits 33a and 33b and the detection
Temperature of the thermistor incorporated in the circuits 33a and 33b
Temperature T of the detection circuit 33a depending on the temperature condition_TwoBut
The set temperature T₀It becomes higher and the detection circuit 33b
Detection temperature T₁Can be equal to. Therefore, this implementation
The abnormality determination means 35 in the form is the temperature detected by the detection circuit 33a.
T_TwoIs the set temperature T ₀When it gets higher
The same as the abnormality determining means 35 of the first embodiment shown in FIG.
Operate. In addition, the detection temperature T of the detection circuit 33a_TwoIs detected
Detection temperature T of circuit 33b₁When equal to
Completely the same as the abnormality determination means 35 of the second embodiment shown in FIG.
Works.

In each of the above embodiments, the abnormality determining means 3
5 is a bath combustion unit 4 when it is determined that the short circuit is abnormal.
However, the combustion operation of the bathtub combustion unit 4 may not be immediately stopped, and the occurrence of the short circuit abnormality may be first displayed on the display 27 to notify the user. .

Contrary to the present embodiment, the combustion section 4 for the bathtub is
When the combustion operation of the hot water supply combustor 3 is stopped, the time t ₁ measured by the timer 36 is the hot water temperature T detected by the bath water temperature sensor 23.
_The short circuit abnormality is detected by the abnormality determination means 35 in the same manner as described above except that the time t ₂ until the residual heat due to the combustion operation of the bath combustion unit 4 is no longer detected in 1 is.

Further, in the present embodiment, the case of the combined hot water supply system has been described as an example of the combustion equipment having a plurality of combustion sections. Such a combustion equipment is a combined combustion system of floor heating and a water heater. It may be a combined combustion system of indoor heating and a water heater.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing an example of a combustion device of the present invention.

FIG. 2 is an explanatory view showing an embodiment of a main part of FIG.

FIG. 3 is a flowchart for explaining the operation of one embodiment of the abnormality determination means corresponding to FIG.

FIG. 4 is a flowchart illustrating the operation of another embodiment of the abnormality determination means corresponding to FIG.

FIG. 5 is a flowchart for explaining the operation of still another embodiment of the abnormality determination means corresponding to FIG.

6 is an explanatory view showing another embodiment of the main part of FIG. 1. FIG.

FIG. 7 is a flowchart for explaining the operation of an embodiment of the abnormality determination means corresponding to FIG.

[Explanation of symbols]

3, 4 ... Combustion part, 9, 23 ... Temperature detection means, 25 ... Operation control means, 33a, 33b ... Temperature detection means, 35 ... Abnormality determination means.

Claims (6)

[Claims] 1. A plurality of temperature detecting means provided with a plurality of combustion parts and corresponding to each combustion part for detecting the temperature of a heated object heated by each combustion part, and a plurality of temperature detection means. And a plurality of temperature detecting means for detecting the temperature of each heated object from the detection signal of each temperature detecting means, and the combustion of each combustion part based on the temperature of each heated object detected by each temperature detecting means In a combustion device in which the operation control means for controlling the operation is provided and the plurality of temperature detecting means are arranged adjacent to each other, one combustion section is performing combustion operation and the other combustion section is performing combustion operation. When the temperature detected by the temperature detecting means corresponding to the combustion part in which the combustion operation is stopped is higher than a predetermined reference value, a short circuit abnormality between the temperature detecting means An abnormality determination means for determining Combustion equipment characterized by. 2. A plurality of temperature detecting means provided with a plurality of combustion parts and corresponding to each combustion part for detecting the temperature of a heated object heated by each combustion part, and a plurality of temperature detection means. And a plurality of temperature detecting means for detecting the temperature of each heated object from the detection signal of each temperature detecting means, and the combustion of each combustion part based on the temperature of each heated object detected by each temperature detecting means In a combustion device in which the operation control means for controlling the operation is provided and the plurality of temperature detecting means are arranged adjacent to each other, one combustion section is performing combustion operation and the other combustion section is performing combustion operation. The temperature detected by the temperature detection means corresponding to the combustion part in which the combustion operation is stopped is the same value as the temperature detected by the temperature detection means corresponding to the combustion part in which the combustion operation is stopped. If it is A combustion device characterized by being provided with abnormality determination means. 3. A plurality of temperature detecting means provided with a plurality of combustion parts and corresponding to each combustion part for detecting the temperature of a heated object heated by each combustion part, and a plurality of temperature detection means. And a plurality of temperature detecting means for detecting the temperature of each heated object from the detection signal of each temperature detecting means, and the combustion of each combustion part based on the temperature of each heated object detected by each temperature detecting means In a combustion device in which the operation control means for controlling the operation is provided and the plurality of temperature detecting means are arranged adjacent to each other, one combustion section is performing combustion operation and the other combustion section is performing combustion operation. When the temperature is stopped, the temperature detected by the temperature detection means corresponding to the combustion part in which the combustion operation is stopped is accompanied by the temperature detected by the temperature detection means corresponding to the combustion part in the combustion operation. Short-circuit error when rising Combustion equipment characterized in that it is provided with means for determining abnormality. 4. A plurality of temperature detecting means provided with a plurality of combustion parts and corresponding to each combustion part for detecting the temperature of a heated object heated by each combustion part, and a plurality of temperature detection means. And a plurality of temperature detecting means for detecting the temperature of each heated object from the detection signal of each temperature detecting means, and the combustion of each combustion part based on the temperature of each heated object detected by each temperature detecting means In a combustion device in which the operation control means for controlling the operation is provided and the plurality of temperature detecting means are arranged adjacent to each other, one combustion section is performing combustion operation and the other combustion section is performing combustion operation. When the temperature is stopped, the temperature detected by the temperature detection means corresponding to the combustion part in which the combustion operation is stopped is increased by the temperature detection means corresponding to the combustion part in the combustion operation. Short circuit error when descending with A combustion device characterized by being provided with an abnormality determining means for determining. 5. The abnormality determining means detects a short circuit abnormality between the temperature detecting means after a predetermined time elapses from one combustion section performing combustion operation when another combustion section finishes combustion operation. The combustion equipment according to any one of claims 1 to 4, wherein 6. The operation control means stops the combustion operation of each combustion section when the abnormality determination means determines that there is a short circuit abnormality between the temperature detection means. The combustion device according to claim 5.