JPH0771819A - Hot-water supply apparatus - Google Patents

Abstract

PURPOSE:To eliminate the problem that any counter measure is not taken against troubles, leaving the troubles as they are by a method wherein troubles of such kind that there is no need to stop a hot-water supply operation are detected to store them in a storage means during a normal hot-water supply operation so that such troubles are displayed on a display means at the time of maintenance. CONSTITUTION:When a quasi-abnormality is detected by a quasi-abnormality sensing means 202, an error code 02 indicating the occurrence of hunting of hot-water supply temperature To is stored in a storage device M. And following the operation of a maintenance switch 15 of a remote controller R, a hot-water supply control means 101 functions to display the error code 01 or 02 stored in the device M on a quasi-abnormality display device 12b. A user can review the existence and kinds of error codes in the device M as maintenance information by operating a maintenance switch 15 during a hot-water supply operation, while continuing the hot-water supply operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control means for executing a hot water supply operation, an abnormality detecting means for detecting an abnormality requiring a stop of the hot water supply operation, and an abnormality detected by the abnormality detecting means. And a hot water supply device in which the control means is configured to stop the hot water supply operation.

[0002]

2. Description of the Related Art Conventionally, in this kind of hot water supply apparatus, an abnormality detecting means for detecting an abnormality requiring a stop of the hot water supply operation is provided for various troubles occurring in the apparatus, and the abnormality detecting means has an abnormality. The hot water supply operation is configured to be stopped when is detected.

An example of the abnormality requiring the stop of the hot water supply operation is, for example, a case where the temperature of the hot water supplied from the hot water tap is significantly higher than the set target hot water supply temperature.

[0004]

However, according to the above-mentioned prior art, the hot water supply operation is carried out as usual for the kind of malfunction which does not require the stop of the hot water supply operation.
There was an inconvenience that the failure was left unaddressed because the failure was not addressed.

As a type of malfunction that does not require stopping the hot water supply operation, for example, the deviation between the hot water supply temperature and the set target hot water supply temperature is not so large as to cause the abnormality detecting means to detect an abnormality, but hunting causes a constant value. It doesn't depend on the temperature of
There are disadvantages such as the control operation of the hot water supply operation is significantly complicated, and the fuel consumption amount is significantly increased.

An object of the present invention is to eliminate the above-mentioned conventional drawbacks.

[0007]

A first characteristic configuration of a hot water supply apparatus according to the present invention is a quasi-abnormality detection means for detecting a quasi-abnormality that does not require stopping the hot water supply operation, and detection information of the quasi-abnormality detection means. Is provided with a storage means for storing and a display means for displaying the storage information of the storage means.

A second characteristic configuration of the hot water supply apparatus according to the present invention specifies a preferable specific configuration for implementing the first characteristic configuration, and the display means is instructed to display a quasi-abnormality. Accordingly, it is configured so as to perform display operation.

[0009]

According to the first characteristic configuration of the present invention, a quasi-abnormality detecting means for detecting a quasi-abnormality which does not require stopping the hot water supply operation, and a storage means for storing detection information of the quasi-abnormality detecting means,
Since the display means for displaying the storage information of the storage means is provided, it is possible to detect and store in the storage means a type of malfunction that does not require the stop of the hot water supply operation even when the hot water supply operation is performed normally. In addition, it can be displayed on the display means during maintenance.

According to the second characteristic construction, the display means is constituted so as to perform the display operation in response to the instruction of the display of the quasi-abnormality, so that the hot water supply operation is carried out as usual,
It is possible to always confirm the occurrence of a type of malfunction that does not require stopping the hot water supply operation.

[0011]

According to the first characteristic configuration of the present invention, even when the hot water supply operation is performed as usual, it is possible to detect and store in the storage means a defect of a type that does not require stopping the hot water supply operation. Moreover, since it can be displayed on the display means during maintenance, it is possible to provide a hot water supply device in which the inconvenience that the defect is left unaddressed is not addressed.

According to the second characteristic configuration, it is possible to confirm the occurrence of a type of malfunction that does not always require stopping the hot water supply operation even when the hot water supply operation is performed as usual, so that the malfunction is left for a long time. It is possible to provide a hot water supply device in which the inconvenience caused is eliminated.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a hot water supply device including a water heater main body A for supplying hot water to the manual calor 9 and a remote control device R.

The water heater main body A includes a burner 1, a heat exchanger 2 heated by the combustion gas of the burner 1, a blower type fan 3 for blowing combustion air to the burner 1, and various operations of the water heater. It is composed of a controller H for controlling.

The burner 1 includes an igniter 4 for igniting the burner 1 and a flame for detecting ignition of the burner 1.
A rod 5 is provided. The fuel gas supply passage G1 of the burner 1 is provided with a gas amount adjustment valve 6 and an interrupt valve 7 for adjusting the fuel supply amount Ip to the burner 1.

The heat exchanger 2 has a water supply passage W1 for supplying tap water for heating to the heat exchanger 2 and a hot water supply passage W2 for supplying hot water heated by the heat exchanger 2 to the manual currant 9. It is connected. In the water supply passage W1, a water supply amount sensor S1 for detecting the hot water supply amount Q and a water supply temperature sensor S for detecting the water supply temperature Ti.
2 and are provided. In the hot water supply passage W2, the hot water supply temperature To
A hot water supply temperature sensor S3 for detecting the hot water supply and a water proportional valve 8 for adjusting the hot water supply amount Q are provided.

The manual calor 9 is constructed so that it can be opened or closed by a switch operation.

A water supply amount sensor S1, a water supply temperature sensor S2,
Hot water temperature sensor S3, frame rod 5, fan 3,
The igniter 4, the gas amount adjusting valve 6, the intermittent valve 7 and the water proportional valve 8 are connected to the controller H. The controller H is connected to a remote control device R and a storage unit M as storage means for storing detection information of quasi-abnormality detection means 201 and 202 described later.

The remote control device R includes an operation switch 10
A driving lamp 11, a display section 12a for displaying operation information such as the target hot water supply temperature Ts, a quasi-abnormality display section 12b as display means for displaying stored information of the storage section M, setting of the target hot water supply temperature Ts, and Up switch 13u to change
Further, a down switch 13d and a maintenance switch 15 for instructing to display the stored information of the storage unit M on the semi-abnormality display unit 12b are provided.

The controller H is mainly composed of a microcomputer, and is configured to be able to control various operations of the water heater by the built-in software. The controller H has, as its function, a hot water supply control means 101 for executing a hot water supply operation to the manual currant 9.
Is configured. The hot water supply control means 101 opens the on-off valve 7 in response to the opening operation of the manual calor 9 and ignites the burner 1 by the igniter 4, and thereafter the burner 1
Is burned with maximum capacity, and the hot water supply amount Q is adjusted by adjusting the water proportional valve 8 so that the hot water supply temperature To becomes the set target hot water supply temperature Ts. When the water proportional valve 8 is fully open, the gas amount adjusting valve 6 is adjusted. At that time, the fan 3
The burner 1 is driven at a preset rotation speed based on the fuel supply amount Ip so that the combustion state of the burner 1 becomes the optimum state.

The specific control mode is based on the following equation. Q = Op / (Ts-Ti) (l / min) However, Op = 400- (kcal / min) Here, Op = 400kcal / min is the maximum capacity of the burner 1. Therefore, β is, when the hot water supply temperature To and the target hot water supply temperature Ts do not match due to some trouble,
It works as a correction term for correcting the hot water supply amount Q.

Further, the controller H is provided with an abnormality detecting means 102 for detecting an abnormality which requires stopping the hot water supply operation. The abnormality detecting means 102 is configured to detect an abnormality that requires stopping the hot water supply operation when the deviation ΔC between the hot water supply temperature To and the set target hot water supply temperature Ts becomes equal to or greater than the set limit value.

Further, the controller H has a quasi-abnormality detecting means 20 for detecting a quasi-abnormality which does not require stopping the hot water supply operation.
1 and 202 are configured. Semi-abnormality detection means 201
Is configured to detect a quasi-abnormality as the value of β, which is the correction term of the equation for controlling the hot water supply amount Q, becomes equal to or larger than the set value.

In this embodiment, the set value is β = 1.
It is 50 kcal / min. This corresponds to a quasi-abnormality when the set target hot water supply temperature Ts is 50 ° C. and the hot water supply temperature To is only 35 ° C. even though the burner 1 is burned at the maximum capacity. When the above-mentioned quasi-abnormality is detected, the primary supply pressure of the fuel gas to the fuel gas supply passage G1 is reduced, the mechanical operation of the water proportional valve 8 is defective, or the nozzle of the burner 1 is clogged. It is expected that a problem has occurred.

The quasi-abnormality detecting means 202, when the value of the hot water supply temperature To hunts within a fluctuation range of a set value or more,
It is configured to detect a quasi-abnormality. In this embodiment, the set value is set to ± 2 ° C. FIG. 2 shows the hot water supply temperature To when the hot water supply temperature To is hunting.
And the deviation ΔC with respect to the set target hot water supply temperature Ts over time are shown. Deviation ΔC of ± 2 ° C or more in the hunting state
Are detected as they are detected a set number of times or more during the unit time dt. When the quasi-abnormality as described above is detected, it is expected that a problem such as a change in the supply pressure of tap water to the water supply passage W1 has occurred.

The hot water supply control means 101 is a semi-abnormality detection means 2
When a quasi-abnormality is detected at 01 or 202, an error code as detection information is stored in the storage unit M. When the quasi-abnormality detecting means 201 detects a quasi-abnormality, an error code 01 indicating a decrease in hot water supply capacity is stored in the storage unit M. Semi-abnormality detection means 20
When a quasi-abnormality is detected in No. 2, error code 02 indicating that hunting of hot water supply temperature To has occurred
Are stored in the storage unit M.

Then, the hot water supply control means 101 causes the error code 01 or 0 stored in the storage section M in accordance with the operation of the maintenance switch 15 of the remote control device R.
2 is displayed on the quasi-abnormality display portion 12b. By operating the maintenance switch 15 during the hot water supply operation, the user can see the existence and type of the error code in the storage unit M as the maintenance information while continuing the hot water supply operation.

[Other Embodiments] The quasi-abnormality detecting means is not limited to the quasi-abnormality detecting means 201 and 202 described above, but can be appropriately changed and added. The water supply temperature Ti, the water supply amount Q, the operating state of the water proportional valve 8, the operating state of the gas amount adjusting valve 6 and the like are inspected, and for example, even if the operation of adjusting the valve opening of the water proportional valve 8 is stopped. Alternatively, when the detected water supply amount Q changes, a quasi-abnormality may be detected. In this case, it is expected that the supply pressure of the tap water to the water supply passage W1 will fluctuate abnormally.

The control mode of the hot water supply control means is not limited to the flow type like the hot water supply control means 101 described above, and the hot water supply temperature To is adjusted by adjusting the fuel supply amount Ip of the gas amount adjusting valve 6 with the amount of water supply kept constant. May be adjusted to the set target hot water supply temperature Ts, or a hot and cold water mixing type mixing valve may be provided to adjust the hot water supply temperature To by adjusting the mixing ratio of hot and cold water.

The hot water supply device is not limited to the flow type, but may be a hot water storage type.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an overall configuration of a water heater.

FIG. 2 is a graph showing a time change of a deviation between a hot water supply temperature and a set target hot water supply temperature.

[Explanation of symbols]

 M storage means 12b display means 101 control means 102 abnormality detection means 201 semi-abnormality detection means 202 semi-abnormality detection means

Claims (2)

[Claims] 1. A control means (101) for executing a hot water supply operation.
And an abnormality detecting means (102) for detecting an abnormality requiring a stop of the hot water supply operation, and the abnormality detecting means (102) detects an abnormality, and the control means (101) performs the hot water supply operation. A hot water supply device configured to stop a quasi-abnormality detection unit (201, 202) for detecting a quasi-abnormality that does not require stopping the hot water supply operation, and the quasi-abnormality detection unit (201, 202) A hot water supply device provided with a storage means (M) for storing the detection information of No. 1 and a display means (12b) for displaying the storage information of the storage means (M). 2. The hot water supply apparatus according to claim 1, wherein the display means (12b) is configured to perform a display operation in response to an instruction to display a semi-abnormal condition.