JP3364513B2 - Control equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating section, a detecting section for detecting the state of the operating section itself or the state of an object controlled by each of the operating sections, and detection information and operation of the detecting section. The present invention relates to a control device provided with a control unit that controls the operation of the operation unit based on operation information.

[0002]

2. Description of the Related Art Conventionally, in this type of control device, when an abnormality occurs in driving operation during operation, the detection information of the detection means is stored in a storage means as the abnormality is detected. During maintenance, the storage information of the storage means can be referred to (for example,
(See Japanese Patent Laid-Open No. 5-99432).

[0003]

However, according to the above-mentioned prior art, since only the detection information when the abnormality of the detecting means is detected can be referred to during the maintenance, it is possible to detect the abnormality when the abnormality occurs. It is difficult to assume the operating state of the control equipment, and it is difficult to estimate and investigate the cause of the abnormality and the location of the failure. The purpose of the present invention is to
The point is to eliminate the above-mentioned conventional drawbacks.

[0004]

A first characteristic configuration of a control device according to the present invention is an abnormality detecting means for detecting an abnormality in a driving operation, and the abnormality detection means detects the abnormality as the abnormality is detected. storage means for storing detection information unit, a mode instruction means for instructing is provided to switch between the normal operation mode and a maintenance operation mode to the control means, prior
The storage means detects an abnormality by the abnormality detection means.
The detection information of the detection means for each
Is configured to store with the control means, when the maintenance operation mode, stored in the storage means
Memory information about multiple occurrences of abnormalities
Based on the stored information selected by the stored information selection means
It is configured to control the operation of the operation unit.

The second and third characteristic configurations of the control device according to the present invention specify a preferred specific configuration for implementing the first characteristic configuration.

A second characteristic configuration is that a display means is provided for displaying the stored information in the storage means in the maintenance operation mode.

A third characteristic configuration is that the operating section is a combustion apparatus including a burner and a fan for ventilating combustion air through the burner.

[0008]

According to the first characteristic configuration of the present invention, the storage means
However, the detection means each time an abnormality is detected by the abnormality detection means
Detected information about multiple occurrences of anomalies should be stored
And the control means is in the maintenance operation mode.
The abnormality occurrences stored in the storage means multiple times.
Of the stored information about the
To control the operation of the operating unit based on the stored information
Since it is configured, abnormalities may occur during maintenance.
It is possible to reproduce the operating state of the control device when it occurred.
I will be able to do it. Moreover, the control means is
In the rotating mode, the multiple times stored in the storage means
Of the stored information about abnormalities, the stored information selection
The operation of the operation unit is controlled based on the stored information selected in the column.
Therefore, at the time of maintenance, simply
It is not possible to reproduce the operating state of control equipment when an abnormality occurs
The operator selects the stored information from multiple occurrences of abnormalities.
Operation status of control equipment when an abnormality occurs selected by
Will be able to be reproduced. Therefore, Men
At the time of tenancy, the operator uses the stored information selection
By selecting the stored information about several abnormal occurrences
Therefore, it is not only necessary to operate the control equipment at the time of one abnormality.
Control when multiple abnormalities occur, such as before and after that.
It is possible to reproduce the operating state of your equipment.
It

According to the second characteristic configuration, since the display means for displaying the stored information of the storage means in the maintenance operation mode is provided, the detection information of the detection means when the abnormality is detected is referred to. However, the reproduced operating state of the control device can be observed.

According to the third characteristic configuration, since the operating unit is the combustion device including the burner and the fan for blowing the combustion air to the burner, the fuel supply amount, the rotation speed of the fan, etc. It is possible to reproduce the combustion state of the burner, the ventilation state of the combustion air, and the like, which are difficult to assume, to the state when the abnormality is detected.

[0011]

According to a first characterizing feature of the present invention, Men
At the time of tenancy, the control device
As an operating condition, not only when one abnormality occurs, but before that
You can also check the operating status when multiple abnormalities occur, such as when a subsequent abnormality occurs.
Estimate and search for causes of abnormalities and failure points while referencing
It is possible to perform
Control device that can easily and accurately estimate and search for places
Can be provided.

According to the second characteristic configuration, since the reproduced operating state of the control device can be observed with reference to the detection information of the detecting means when the abnormality is detected, the cause of the abnormality or the failure. It is possible to provide a control device that can more easily estimate and search a location.

According to the third characteristic configuration, the combustion state of the burner, the ventilation state of the combustion air, and the like, which are difficult to assume from the fuel supply amount and the rotation speed of the fan, are set to the state when the abnormality is detected. Since it can be reproduced, it is possible to provide a combustion apparatus that can easily estimate and investigate the cause of an abnormality, the location of a failure, or the like during maintenance.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a hot water supply device as an example of a control device. The hot water supply device is composed of a hot water supply device main body A for supplying hot water to the hot water tap K, and a remote control device R.

The water heater main body A includes a burner 1, a heat exchanger 2 heated by combustion gas of the burner 1, a blower type fan 3 for passing combustion air to the burner 1, and various operations of a water heater. It is composed of a combustion device whose main part is 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 a hot water tap K. It is connected. In the water supply passage W1, a water supply amount sensor S1 that detects the hot water supply amount Q, a water temperature correction valve 8 that automatically adjusts the water supply amount according to the water temperature, and a water supply temperature sensor S2 that detects the water supply temperature Ti.
And are provided. The hot water supply passage W2 has a hot water discharge temperature sensor S3 for detecting the hot water discharge temperature To and a branch passage W of the water supply passage W1.
A mixing valve 9 that mixes the water from 3 and a hot water temperature sensor S4 that detects a hot water temperature Tx to the hot water tap K are provided.

The hot water supply amount Q is adjusted by a hot water supply tap K. The water flow rate to the heat exchanger 2 is adjusted by the water temperature correction valve 8 and the mixing valve 9.

The fan 3 is provided with an encoder S5 for detecting the rotation speed N of the fan 3.

Water supply amount sensor S1, water supply temperature sensor S2,
The hot water outlet temperature sensor S3, the hot water supply temperature sensor S4, the encoder S5, the frame rod 5, the fan 3, the igniter 4, the gas amount adjusting valve 6, the intermittent valve 7 and the mixing valve 9 are connected to the controller H. A remote control device R is connected to the controller H.

The remote control device R includes an operation switch 10
A driving lamp 11, a display unit 12 for displaying control information such as the target hot water supply temperature Ts, an up switch 13u and a down switch 13d for setting and changing the target hot water supply temperature Ts, a normal operation mode, and a maintenance described later. A maintenance switch 14 as a mode switching means for instructing the controller H to switch to the operation mode;
A reproduction operation button 15 for performing a reproduction operation described later is provided.

The controller H is mainly composed of a microcomputer, and is configured to be able to control various operations of the hot water supply device by the built-in software. That is, the controller H controls the operation of the operation unit D in the normal operation mode so as to execute the plurality of operations for the normal operation in the set order based on the detection information of the detection unit S and the operation information of the operation. Further, in the maintenance operation mode, the control unit 100 is configured to control the operation of the operation unit D based on the storage information J of the storage unit M described later.

In this embodiment, the operating section D is a burner 1, a fan 3, an igniter 4, a gas amount adjusting valve 6, an interrupt valve 7 and a mixing valve 9. The detection means S is configured to detect the state of the operation unit D itself or the state of the object controlled by each of the operation units D. In the present embodiment, the detection means S detects the water supply amount Q, the water supply temperature Ti, the hot water supply temperature To, the hot water supply temperature Tx as the state of the target object, and the water supply amount sensor S that detects the operating state of the various operating units D.
1, a hot water temperature sensor S2, a hot water temperature sensor S3, a hot water temperature sensor S4, and the controller H itself.

In the control means 100, the hot water tap K is opened,
When the water supply amount Q above the set amount is detected by the water supply amount sensor S1, the fan 3 is driven at the set rotation speed N for the pre-purge for the set time, and then the disconnecting valve 7 is opened and the igniter 4 is opened. The burner 1 is ignited at
Based on the detected hot water supply amount Q of 1 and the detected hot water temperature Ti of the hot water temperature sensor S2, the detected hot water temperature To detected by the hot water temperature sensor S3 is a predetermined high temperature Toh (for example, 80
C), and the detected hot water supply temperature Tx detected by the hot water supply temperature sensor S4 based on the hot water supply temperature Ti and the target hot water supply temperature Ts set by the remote controller R. The mixing valve 9 is adjusted so as to reach the hot water supply temperature Ts, and at the same time, the rotation speed N of the fan 3 is set to the fuel supply amount I.
It is configured to drive to a target drive state set based on p.

As the hot water supply tap K is closed and the hot water supply quantity sensor S1 detects the hot water supply quantity Q less than the set quantity,
The shut-off valve 7 is closed, and the fan 3 is driven at a set rotational speed N for post-purge for a set time.

The control means 100 controls the rotation speed N of the fan 3 by so-called duty control. FIG. 2 shows a control mode of fan control. In the duty control, first, the fuel supply amount Ip calculated by the hot water supply amount Q, the water supply temperature Ti, and the predetermined hot water discharge temperature Toh,
Based on the setting function F1 stored inside the controller H, the target rotation speed N as the target drive state of the fan 3 set based on the fuel supply amount Ip is obtained. The setting function F1 is a function set in advance so as to correspond to the fuel supply amount Ip so that the amount of combustion air blown by the fan 3 is in a proper combustion state of the burner 1.

Next, based on the target rotation speed N and the setting function F2, a predetermined fan application voltage V for obtaining a desired fan rotation speed N is obtained, and the obtained fan application voltage V is obtained. Drive the fan 3. Here, the actual rotation speed N (detection value) of the fan 3 is detected by the encoder S5.

Finally, the voltage correction amount ΔV of the fan applied voltage V is based on the deviation ΔN between the target rotation speed N (corrected N described later) and the actual rotation speed N (detection value) and the setting function F3. Is calculated and the fan 3 is driven by the fan applied voltage V (correction value) corrected by the voltage correction amount ΔV, so-called feedback correction control is performed.

The specific control mode is based on the following equation. V (correction value) = V (determined value based on the setting function F2) +
ΔV where ΔV is a voltage correction amount, which is a determined value based on ΔN and the setting function F3. ΔN is based on the following formula. ΔN = N (correction value of target speed N described later) -N
(Detection value)

However, if dust is trapped or ventilation is obstructed in the fan 3, the filter portion of the fan 3, the air supply passage, the exhaust passage, etc., the fan is rotated at the target rotation speed N. The actual air flow rate of 3 is smaller than the target air flow rate. In this case, the work of the fan 3 is reduced by the amount of the blown air,
According to the above control, the fan applied voltage V (correction value) when the fan 3 reaches the target rotation speed N is the fan applied voltage V
It has been confirmed that the value is smaller than the (determined value based on the setting function F2). It has also been confirmed that the voltage correction amount ΔV increases as the degree of dust clogging or ventilation trouble increases.

The voltage correction amount ΔV indicates that when the value of ΔV is positive (+), the voltage is insufficient to maintain the rotation speed N of the fan 3 at the target rotation speed N, while the value of ΔV When the value is negative (-), it means that the voltage is excessive to maintain the rotation speed N at the target rotation speed N. When dust is trapped or ventilation trouble occurs, the voltage is excessive, that is, the value of ΔV tends to increase in the negative (−) direction.

Therefore, the voltage correction amount ΔV and the setting function F4
On the basis of and, the rotational speed correction amount Nc corresponding to the voltage correction amount ΔV is determined, and the target rotational speed N obtained by the setting function F1 is increased by the rotational speed correction amount Nc. There is. The setting function F4 is set so as to obtain a desired target ventilation amount when a predetermined voltage correction amount ΔV is detected, for example, by prescribing a rotational speed correction amount Nc obtained in advance by experiments or the like. There is. As a result, the ventilation amount of the fan 3 can be adjusted to the target ventilation amount regardless of the occurrence of dust clogging or ventilation trouble.

The specific correction form is based on the following equation. N (correction value) = N (determined value based on the setting function F1) +
Nc where Nc is a determined value based on the voltage correction amount ΔV and the setting function F4.

As an example of specific numerical values, the adjustment opening Ip
When the target rotation speed N determined based on the setting function F1 and the setting function F1 is 3000 rpm, the target rotation speed N and the setting function F2 are set.
The fan applied voltage V determined on the basis of
When the correction value of the fan applied voltage V is 18V, that is, when the voltage correction amount ΔV is 2V, the rotation speed correction amount Nc is set to 200 rpm by the voltage correction amount ΔV and the setting function F4, and the target rotation speed is set. N from 3000r.pm to 3200r.
Correct to pm and repeat the same control again.

Then, in the controller H, an abnormality detecting means 201 for detecting an abnormality in the driving operation as the rotation speed correction amount Nc becomes equal to or more than the set value n as the set limit,
As another abnormality detecting means, the detected hot water supply temperature Tx of the hot water supply temperature sensor S4 shown in FIG.
On the other hand, the abnormality detection unit 202 is configured to detect an abnormality in the driving operation when the deviation of the set value or more occurs for the set time (several seconds) or more.

The control means 100 causes the water heater main body A to follow the abnormality detected by the abnormality detection means 201 or 202.
The hot water supply operation is stopped, and the storage means M stores the amount of water supply Q as the detection information J of the detection means S, the water supply temperature Ti, the hot water supply temperature To, the hot water supply temperature Tx, the valve opening j5 of the mixing valve 9, and the gas amount. The valve drive output j6 of the adjusting valve 6 and the set target hot water supply temperature Ts of the remote control device R are configured to be stored for a plurality of abnormal occurrences . That is, the storage means M
If the abnormality is detected by the abnormality detecting means 201 or 202
Water supply amount Q and water supply temperature as detection information J of the detection means S
Ti, hot water temperature To, hot water supply temperature Tx, mixing valve 9 open
Degree j5, valve drive output j6 of gas amount adjusting valve 6 and remote controller
The set target hot water supply temperature Ts of the device R is set to the number of times the abnormal occurrence occurs.
It is configured to remember about. In addition, when the hot water supply operation is automatically stopped, the hot water supply operation can be restarted by turning off the operation switch 10 and then turning it on again. If the cause of the abnormality is transient, the hot water supply operation can be continued, and if the cause of the abnormality continues, the hot water supply operation is stopped again.

FIG. 3 shows the storage information of the storage means M. The storage means M is composed of a non-volatile memory, and is configured to store six sets of 10 types of information. The 10 types of information include the number of times of detection j1 indicating the number of times of abnormality detection, the error number j2 indicating the type of abnormality, the water supply amount Q, the water flow amount j3 of the heat exchanger 2 obtained by calculation, the water temperature Ti, the hot water temperature To, The hot water supply temperature Tx, the valve opening j5 of the mixing valve 9, the valve drive output j6 of the gas amount adjusting valve 6, and the set target hot water supply temperature Ts. The six sets of storage information are stored in the storage areas from address 10 to address 60, respectively.

A new set of detection information J is always stored in the storage area of address 10, and the storage information that has already been stored is moved to the storage area one step below. The stored information stored in the address 60 is deleted.

Maintenance switch 1 of remote control device R
When 4 is operated, the mode is switched to the maintenance operation mode. When the control means 100 is switched to the maintenance operation mode, the storage means M is displayed in the storage information display section 12a of the display section 12 of the remote control device as the display means.
The stored information stored in is displayed. The address of the stored information to be displayed can be sequentially selected by the up switch 13u as the stored information selecting means , and the control can be performed.
The means 100 stores the memory in the maintenance operation mode.
The abnormal occurrences stored in the means M
Of the stored information, selected by the up switch 13u
The stored information is displayed on the stored information display unit 12a. The display content of the stored information display portion 12a can be sequentially switched and displayed by the down switch 13d.

At this time, the auxiliary information display section 12b displays the number of errors, the operation mode, the number of the detection sensor of the detection information J displayed on the storage information display section 12a, and the like. Is displayed in conjunction with.

Then, the control means 100 operates in response to the reproduction operation switch 15 of the remote controller R being operated in the maintenance operation mode, and the up switch 13u.
The operation unit D is operated based on the stored information selected by. Specifically, the fan 3, the igniter 4, and the valves are operated in accordance with opening of the hot water supply tap K and matching the amount of water supply Q with the amount of water supply at the time of abnormality detection, and the state becomes the same as that at the time of abnormality detection. . That is, the control means 100
Is stored in the storage means M in the maintenance operation mode.
Of the stored information about the multiple occurrences of abnormalities
Among them, the memory information selected by the up switch 13u
Is configured to control the operation of the operation unit D based on
Thus, the hot water supply device main body A is operated in the same hot water supply state as when an abnormality is detected, so that so-called reproduction operation can be performed. In the reproduction operation, when the feed water temperature Ti is significantly different from that at the time of abnormality detection, a heater or a cooling device is incorporated in the pipe for procurement.

[Other Embodiments] The abnormality detecting means is not limited to the above-mentioned abnormality detecting means 201 and 202, but may be added as appropriate.
For example, in the above-described embodiment, when the various sensors S1 to S4 output the detection information outside the predicted range, it may be detected as an abnormality.

INDUSTRIAL APPLICABILITY The present invention can be applied to various control equipment such as a water heater equipped with a combustion device, a heating device equipped with the combustion device, and an air conditioner not equipped with the combustion device. Therefore, the operation unit D and the detection unit S are also variously changed according to the target control device.

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 configurations 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 block diagram showing a control mode of fan control means.

FIG. 3 is a schematic diagram showing stored information in a storage means.

[Explanation of symbols]

D operating unit J detection information M storage means S detection means 1 burner 3 fan 12 display means 13u storage information selection means 14 mode instruction means 100 control means 201 abnormality detection means 202 abnormality detection means

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields investigated (Int.Cl. ⁷ , DB name) G05B 23/00-23/02 F23H 5/26 F24H 1/10

Claims (3)

(57) [Claims] 1. An operating section (D), a detection means (S) for detecting the state of the operating section (D) itself or the state of an object controlled by each of the operating section (D), and detection thereof. A control device provided with a control means (100) for controlling the operation of the operation section (D) based on the detection information of the means (S) and the driving operation information, the abnormality detecting an abnormality of the driving operation. Detection means (201, 20
2), a storage unit (M) that stores the detection information (J) of the detection unit (S) when the abnormality is detected by the abnormality detection unit (201, 202), a normal operation mode and maintenance. A mode instructing means (14) for instructing the control means (100) to switch to the operation mode is provided, and the storage means (M) is used for the abnormality detection means (201, 2).
02) every time an abnormality is detected in the detecting means (S)
The detection information (J) is stored for multiple occurrences of abnormalities.
A plurality of the control means (100) stored in the storage means (M) in the maintenance operation mode .
Of the stored information about the abnormal occurrence of the
A control device configured to control the operation of the operation section (D) based on the stored information selected by the selection means (13u) . 2. Display means (1) for displaying the storage information of the storage means (M) in the maintenance operation mode.
2. The control device according to claim 1, further comprising 2). 3. The control according to claim 1, wherein the operating section (D) is a combustion device including a burner (1) and a fan (3) for ventilating combustion air through the burner (1). machine.