TW201721059A - Bath safety control system and bath safety control method - Google Patents

Abstract

A bath safety control system and a bath safety control method are disclosed. The bath safety control system is electrically coupled to a load and includes a power source, at least one safety relay, an operation relay, a processing unit, and a detecting unit. The processing unit determines whether the operation relay has a fault according to whether the detecting unit is activated. When the processing unit determines that the operation relay has the fault, the processing unit controls the at least one safety relay to be turned off. The bath safety control system and the bath safety control method can enhance the protection of the load.

Description

Bath safety control system and bath safety control method

The invention relates to the field of control, in particular to a bath safety control system and a bath safety control method.

Generally, a high-voltage and high-current load and a power source are electrically coupled to the two relays. One of the two relays is a safety relay, and the other is an operation relay. When both the safety relay and the operating relay are turned on, the power of the power supply is supplied to the load.

When the power supply has power, the safety relay is immediately turned on and the operating relay remains non-conductive. When the load is operated, the operation relay switches between conduction and non-conduction according to the user's control. When the load stops operating, as long as the power supply has power, the safety relay remains on to reduce the number of times the safety relay is switched (ie, the number of actions). When the power supply does not have power, both the safety relay and the operating relay are non-conducting. When the operation relay fails, it is necessary to make the safety relay non-conducting to avoid the danger of the load.

For example, when an operating relay that is electrically coupled to a heater (or pump) has a stuck fault, the heater (or pump) continues to operate for a long period of time, causing the water temperature to rise, when the water temperature rises to a dangerous temperature. The controller that controls the safety relay and the operating relay controls the safety relay and the operating relay that are electrically coupled to the heater (or pump) to be non-conducting.

The safety mechanism of the above load is to ensure that the safety relay can be successfully turned off to stop the power supply to the load every time through the few switching times of the safety relay, especially in the operation. When the relay is stuck to the fault.

However, when the above safety mechanism may cause a stuck fault in the operating relay, the safety relay does not immediately fail to conduct power to stop the power supply to the load, and the load or a system including the load may be dangerous.

Therefore, it is necessary to propose a safety mechanism to solve the problem that the safety relay does not immediately turn off to stop the power supply to the load when the operation relay has a stuck fault in the prior art.

The invention provides a bath safety control system and a bath safety control method, which can solve the problem that the safety relay does not immediately turn off to stop supplying power to the load when the operation relay has a sticking fault in the prior art.

The bath safety control system of the present invention is used for electrically coupling at least one load and includes a power source, at least one safety relay, an operation relay, a processing unit, and a detecting unit. The power supply has two power output terminals for supplying power to the load through the two power output terminals. The at least one safety relay is electrically coupled to one of the two power output terminals and the load. The operation relay is electrically coupled between the other of the two power output terminals and the load. The processing unit is electrically coupled to the at least one safety relay and the operation relay. The detecting unit includes at least one input end and an output end, the at least one input end includes a first input end and a second input end, the first input end is electrically coupled to the power source and the at least one safety relay The second input is electrically coupled between the load and the operating relay, and the output is electrically coupled to the processing unit. The processing unit determines whether the operation relay is faulty according to whether the detection unit is actuated. When the processing unit determines that the operation relay is faulty, the processing unit controls the at least one safety relay to be non-conductive.

The bath safety control method of the present invention is used in a bath safety control system, the bath safety control system is electrically coupled to at least one load and includes a power source, at least one safety relay, An operation relay, a processing unit, and at least one detection unit, the power supply having two power output terminals for supplying power to the load through the two power output ends, the at least one safety relay being electrically coupled to the The operating relay is electrically coupled between the other of the two power output terminals and the load, and the processing unit is electrically coupled to the at least one safety relay And the operation relay, the bath safety control method includes the following steps: the processing unit determines whether the at least one detecting unit is activated; and if the at least one detecting unit is actuated, the processing unit determines whether the operating relay should be turned on And the processing unit controls whether the at least one safety relay is turned on or off according to a determination result of whether the operation relay should be turned on.

In the bath safety control system and the bath safety control method of the present invention, the processing unit determines whether the operation relay is faulty according to whether the detecting unit is actuated, and when the processing unit determines that the operation relay is faulty, the processing unit can immediately Control the safety relay to not conduct, to avoid the danger of load.

1, 1', 1" ‧ ‧ bath safety control system

3‧‧‧load

10‧‧‧Power supply

12‧‧‧Safety relay

14‧‧‧Operation relay

16‧‧‧Processing unit

18‧‧‧Detection unit

20‧‧‧Another detection unit

22‧‧‧Another safety relay

100, 102‧‧‧ power output

180, 200‧‧‧ first input

182, 202‧‧‧ second input

184, 204‧‧‧ output

S10~S18, S20~S28‧‧‧ steps

1 is a block diagram showing a bath safety control system according to a first embodiment of the present invention; FIG. 2 is a block diagram showing a bath safety control system according to a second embodiment of the present invention; and FIG. 3 is a view showing a bath safety control system according to a second embodiment of the present invention; Block diagram of a bath safety control system of a third embodiment; FIG. 4 is a flow chart showing a bath safety control method according to a first embodiment of the present invention; and FIG. 5 shows a bath safety according to a second embodiment of the present invention. Flow chart of the control method.

Referring to Figure 1, there is shown a block diagram of a bath safety control system 1 in accordance with a first embodiment of the present invention.

The bath safety control system 1 is configured to electrically couple at least one load 3 and include one The power source 10, at least one safety relay 12, an operation relay 14, a processing unit 16, and a detecting unit 18. The load 3 is selected from at least one of the group consisting of a heater, a pump, and a fan.

The power supply 10 has two power output terminals 100, 102 for supplying power to the load 3 through the two power output terminals 100, 102. The safety relay 12 is electrically coupled to the power output 100 (ie, one of the two power output terminals 100, 102) and the load 3. The operation relay 14 is electrically coupled to the power output 102 (ie, the other of the two power output terminals 100, 102) and the load 3. By controlling the safety relay 12 to be non-conducting, power can be stopped to the load 3, which in turn protects the load 3 (described in more detail below).

The processing unit 16 is electrically coupled to the safety relay 12 and the operating relay 14 . The detecting unit 18 includes at least one input end and an output end 184. The at least one input end includes a first input end 180 and a second input end 182. The first input 180 end is electrically coupled to the power source 10 The second input end 182 is electrically coupled between the load relay 3 and the operating relay 14 . The output end 184 is electrically coupled to the processing unit 16 . In this embodiment, the detecting unit 18 is an optical coupler.

The processing unit 16 determines whether the operation relay 14 is faulty according to whether the detection unit 18 is actuated. When the processing unit 16 determines that the operation relay 14 is faulty, the processing unit 16 can immediately control the safety relay 12 to be non-conductive. When the safety relay 12 is not conducting, the power supply 10 stops supplying power to the load 3, thereby avoiding the danger of the load 3.

In a first mode of operation, when the power source 10 is never powered to have power (for example, when the bath safety control system 1 is electrically coupled to a mains), the safety relay 12 is turned on, and the operation relay is not turned on. 14.

The case where the bath safety control system 1 may occur when the power source 10 has electric power will be described in detail below.

When the bath safety control system 1 is in normal operation, the operation relay 14 is turned on or off according to the control of the processing unit 16, and the safety relay 12 continues to be turned on. More specific In other words, when a user operates the load 3 (for example, when the heater is turned on), the processing unit 16 controls the operation relay 14 to be turned on, and the first input terminal 180 and the second input end of the detecting unit 18 are 182, detecting that the operation relay 14 is turned on, so that the detecting unit 18 is actuated, and the processing unit 16 determines that the operating relay 14 is turned on, if the processing unit 16 determines that the operating relay 14 should be turned on (actually, it is also turned on) It means that the operation relay 14 belongs to the normal operation, and the state of the safety relay 12 is not changed, so that the safety relay 12 is kept on. Since the safety relay 12 and the operation relay 14 are both turned on, the power source 10 can supply power to the load 3, thereby causing the load 3 to operate.

When the detecting unit 18 is actuated (representing the operating relay 14 to be turned on), the processing unit 16 determines that the operating relay 14 is conducting, and if the processing unit 16 determines that the operating relay 14 should not be turned on (actually turned on) Representing the operation relay 14 as an abnormal operation, the processing unit 16 changes the state of the safety relay 12 to make the safety relay 12 non-conductive. Since the safety relay 12 is non-conducting, the power supply 10 stops supplying power to the load 3, thereby stopping the operation of the load 3.

When the detecting unit 18 is not actuated (representing that the operating relay 14 is non-conducting), the processing unit 16 determines that the operating relay 14 is non-conducting, and if the processing unit 16 determines that the operating relay 14 does not need to be turned on (actually It is also not turned on. It means that the operation relay 14 belongs to the normal operation, and the state of the safety relay 12 is not changed, so that the safety relay 12 is kept on. Since the safety relay 12 is turned on and the operation relay 14 is non-conductive, the power source 10 does not supply power to the load 3, so that the load 3 does not operate.

When the detecting unit 18 is not actuated (representing that the operating relay 14 is non-conducting), the processing unit 16 determines that the operating relay 14 is non-conducting, and if the processing unit 16 determines that the operating relay 14 needs to be turned on (actually not Turning on, the processing unit 16 controls the operation relay 14 to be turned on. Since the safety relay 12 and the operation relay 14 are turned on, the power source 10 can supply power to the load 3, thereby causing the load 3 to operate.

When the power source 10 does not have power (for example, the bath safety control system 1 and the city) When the electrical power is off, the safety relay 12 and the operation relay 14 are not turned on.

In the first mode of operation, when the power source 10 has power, the processing unit 16 controls only the operation relay 14, the safety relay 12 maintains conduction, and the safety relay 12 can be ensured by reducing the number of times the safety relay is switched. Both successfully failed to conduct to stop supplying power to the 3 load.

In a second mode of operation, when the power source 10 has no power conversion to have power (for example, when the bath safety control system 1 is electrically coupled to a utility), the safety relay 12 and the operation relay 14 are maintained. Not conductive.

The case where the bath safety control system 1 may occur when the power source 10 has electric power will be described in detail below.

When the detecting unit 18 is not actuated (representing that the operating relay 14 is non-conducting), the processing unit 16 determines that the operating relay 14 is non-conducting, and if the processing unit 16 determines that the operating relay 14 does not need to be turned on (actually It is also not turned on. It means that the operation relay 14 is in normal operation, and the state of the safety relay 12 is not changed, so that the safety relay 12 is kept non-conductive. Since the safety relay 12 and the operation relay 14 are non-conductive, the power source 10 does not supply power to the load 3, and the load 3 is not operated.

When the detecting unit 18 is not actuated (representing that the operating relay 14 is non-conducting), the processing unit 16 determines that the operating relay 14 is non-conducting, and if the processing unit 16 determines that the operating relay 14 needs to be turned on (actually not Turning on, the processing unit 16 first controls the safety relay 12 to conduct and then controls the operation relay to be turned on (for example, every 1 second). Since the safety relay 12 and the operation relay 14 are sequentially turned on, the power source 10 can supply power to the load 3, thereby causing the load 3 to operate.

When the detecting unit 18 is actuated (representing the operating relay 14 to be turned on), the processing unit 16 determines that the operating relay 14 is turned on, and if the processing unit 16 determines that the operating relay 14 should be turned on (actually also turned on) It means that the operation relay 14 belongs to the normal operation, and the state of the safety relay 12 is not changed, so that the safety relay 12 is kept on. Because of this safety Both the appliance 12 and the operating relay 14 are conductive, and the power source 10 can supply power to the load 3, thereby causing the load 3 to operate.

When the detecting unit 18 is actuated (representing the operating relay 14 to be turned on), the processing unit 16 determines that the operating relay 14 is turned on, and if the processing unit 16 determines that the operating relay 14 should not be turned on (actually turned on) The operation relay 14 represents an abnormal operation, and the processing unit 16 changes the state of the safety relay 12 to make the safety relay 12 non-conductive. Since the safety relay 12 is not conducting, the power source 10 stops supplying power to the load 3, thereby causing the load 3 to stop operating.

When the bath safety control system 1 is normally operated (ie, the power source 10 has power) and the operation relay 14 and the safety relay 12 need to be non-conducting, the processing unit 16 does not turn on the operation relay 14 and then does not turn on the safety relay. 12.

In the second operation mode, when the operation relay 14 and the safety relay 12 need to be turned on, the safety relay 12 is turned on first, and then the operation relay 14 is turned on. When the operation relay 14 and the safety relay 12 need to be non-conductive. The safety relay 12 is not turned on after the operation relay 14 is not turned on. The purpose of this second mode of operation is to avoid sparking of the safety relay 12 when it is conducting (engaged) or not conducting (opening).

In the bath safety control system 1 of the present invention, the processing unit 16 can obtain the state in which the operation relay 14 is turned on or off through the detecting unit 18, and the processing unit 16 further determines whether the operation relay 14 should be turned on or not. Turning on, if the operation relay 14 should not be turned on and is actually turned on, the processing unit 16 controls the safety relay 12 to be non-conductive, and the power source 10 stops supplying power to the load 3 to protect the load 3.

Referring to Figure 2, there is shown a block diagram of a bath safety control system 1' in accordance with a second embodiment of the present invention.

Compared with the first embodiment, the bathing safety control system 1' of the embodiment further includes another detecting unit 20, the other detecting unit 20 includes at least one input end and an output end 204, the at least one input The end includes a first input end 200 and a second input end 202, the other The first input end 200 of the detecting unit 20 is electrically coupled between the load 3 and the safety relay 12 . The second input end 202 of the other detecting unit 20 is electrically coupled to the power source 10 . The output terminal 204 of the other detecting unit 20 is electrically coupled to the processing unit 16 .

In this embodiment, the other detecting unit 20 can detect that the safety relay 12 is turned on or off, and the protection of the load 3 is enhanced. The security mechanism of this embodiment can be referred to the related description of the first embodiment. Do not add more details.

Please refer to FIG. 3, which shows a block diagram of a bath safety control system 1" according to a third embodiment of the present invention.

The bath safety control system 1" of the present embodiment further includes another safety relay 22 electrically coupled between the operation relay 14 and the load 3 as compared with the first embodiment.

In this embodiment, the other safety relay 22 can further enhance the protection of the load 3. For the security mechanism of the embodiment, reference may be made to the related description of the first embodiment, which is not described in detail.

Please refer to FIG. 4, which shows a flow chart of a bath safety control method according to a first embodiment of the present invention.

The bath safety control method is used for a bath safety control system, the bath safety control system is electrically coupled to at least one load and includes a power source, at least one safety relay, an operation relay, a processing unit, and at least one detecting unit. The power source has two power output terminals for supplying power to the load through the two power output ends, and the at least one safety relay is electrically coupled between the one of the two power output ends and the load, The operation relay is electrically coupled to the other of the two power output terminals and the load, the processing unit is electrically coupled to the at least one safety relay and the operation relay, and the bath safety control method comprises the following steps:

In step S10, the processing unit determines whether the at least one detecting unit is activated. If yes, go to step S12, if no, go to step S14.

In step S12, the processing unit determines whether the operation relay should be turned on, and if so, ends, and if not, proceeds to step S16.

In step S14, the processing unit determines whether the operation relay needs to be turned on, and if so, proceeds to step S18, and if not, ends.

In step S16, the processing unit controls the safety relay to be non-conductive.

In step S18, the processing unit turns on the operation relay.

Referring to FIG. 5, FIG. 5 is a flow chart showing a bath safety control method according to a second embodiment of the present invention.

In step S20, the processing unit determines whether the at least one detecting unit is activated. If yes, go to step S22, if no, go to step S24.

In step S22, the processing unit determines whether the operation relay should be turned on, and if so, ends, and if not, proceeds to step S26.

In step S24, the processing unit determines whether the operation relay needs to be turned on, and if so, proceeds to step S28, and if not, ends.

In step S26, the processing unit controls the safety relay to be non-conductive.

In step S28, the processing unit turns on the safety relay to turn on the operation relay.

In the bath safety control system and the bath safety control method of the present invention, the processing unit determines whether the operation relay is faulty according to whether the detecting unit is actuated, and when the processing unit determines that the operation relay is faulty, the processing unit can immediately Control the safety relay to not conduct, to avoid the danger of load.

While the invention has been described above by way of a preferred embodiment, the invention is not intended to be limited thereto, and the invention may be modified and modified without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

1‧‧‧Bathing Safety Control System

3‧‧‧load

10‧‧‧Power supply

12‧‧‧Safety relay

14‧‧‧Operation relay

16‧‧‧Processing unit

18‧‧‧Detection unit

100, 102‧‧‧ power output

180‧‧‧ first input

182‧‧‧second input

184‧‧‧ output

Claims (15)

A bath safety control system for electrically coupling at least one load, the bath safety control system comprising: a power source having two power output ends for supplying power to the load through the two power output ends; at least one a safety relay electrically coupled between the one of the two power output terminals and the load; an operation relay electrically coupled between the other of the two power output terminals and the load; a processing unit Electrically coupled to the at least one safety relay and the operating relay; and a detecting unit comprising at least one input end and an output end, the at least one input end comprising a first input end and a second input end The first input end is electrically coupled between the power source and the at least one safety relay, the second input end is electrically coupled between the load and the operation relay, and the output end is electrically coupled to the processing a unit, wherein the processing unit determines whether the operation relay is faulty according to whether the detecting unit is actuated, and when the processing unit determines that the operation relay is faulty, the processing unit controls The at least one safety relay does not conduct. The bath safety control system of claim 1, wherein the detecting unit is an optical coupler. The bath safety control system of claim 1, further comprising another detecting unit, the another detecting unit comprising at least one input end and an output end, the at least one input end comprising a first input end And a second input end, the first input end of the other detecting unit is electrically coupled between the load and the at least one safety relay, and the second input end of the other detecting unit is electrically coupled Connected between the power source and the operating relay, the output of the other detecting unit is electrically coupled to the processing unit. The bath safety control system of claim 3, wherein the other detecting unit is an optical coupler. The bath safety control system as described in claim 1, wherein the power source has In the case of electric power, the at least one safety relay is turned on, and the operation relay is not turned on. The bath safety control system according to claim 5, wherein when the bath safety control system is normally operated, the operation relay is turned on or off according to the control of the processing unit, and the safety relay continues to be turned on. The bath safety control system according to claim 6, wherein the safety relay and the operation relay are not turned on when the power source does not have power. The bath safety control system according to claim 1, wherein the safety relay and the operation relay are not turned on when the power source has power. The bath safety control system according to claim 8, wherein when the bath safety control system is normally operated and the operation relay and the safety relay need to be turned on, the safety relay is turned on before the operation relay is turned on. When the bath safety control system is in normal operation and the operation relay and the safety relay need to be non-conducting, the safety relay is not turned on after the operation relay is not turned on. The bath safety control system of claim 1, further comprising another safety relay electrically coupled between the operating relay and the load. The bath safety control system of claim 1, wherein the load is selected from at least one of a group consisting of a heater, a pump, and a fan. A bath safety control method for a bath safety control system, the bath safety control system is electrically coupled to at least one load and includes a power source, at least one safety relay, an operation relay, a processing unit, and at least one detecting unit The power supply has two power output terminals for supplying power to the load through the two power output ends, and the at least one safety relay is electrically coupled between one of the two power output ends and the load. The operation relay is electrically coupled to the other of the two power output terminals and the load, the processing unit is electrically coupled to the at least one safety relay and the operation relay, and the bath safety control method comprises the following steps: The processing unit determines whether the at least one detecting unit is activated; if the at least one detecting unit is actuated, the processing unit determines whether the operating relay should be Turning on; and the processing unit controls whether the at least one safety relay is turned on or off according to a determination result of whether the operation relay should be turned on. The bathing safety control method of claim 12, wherein the processing unit, after determining the step of determining whether the at least one detecting unit is actuated, comprises: if the at least one detecting unit is not actuated, the processing The unit determines whether the operating relay needs to be turned on; and if the operating relay needs to be turned on, the processing unit turns on the operating relay. The bathing safety control method of claim 12, wherein after the step of determining, by the processing unit, the at least one detecting unit is activated, the processing comprises: if the at least one detecting unit is not actuated, the processing The unit determines whether the operation relay needs to be turned on; and if the operation relay needs to be turned on, the processing unit turns on the at least one safety relay and then turns on the operation relay. The bath safety control method according to claim 12, wherein in the step of the processing unit determining whether the operation relay should be turned on, the method further includes: when the processing unit determines that the operation relay should not be turned on, the processing unit Controlling the at least one safety relay to be non-conductive.