JP5625695B2 - Toilet seat heating system - Google Patents

Description

  The present invention relates to a toilet seat heating device for heating a toilet seat surface to a predetermined temperature.

  As a conventional toilet seat heating device, a heat source for warming the toilet seat, a human body detection means, a toilet seat temperature detection means for detecting the temperature inside the toilet seat, and a control means for controlling the heat source and the human body detection means, the control means is When human body detection is performed, power is supplied to the heat source at multiple energization rates for a certain period of time, and then the toilet seat temperature reaches a seatable temperature within a predetermined time at a constant energization rate that is higher than the multiple energization rates. A toilet seat device is disclosed. The predetermined time is determined according to the room temperature detected by the room temperature detecting means or the temperature of the toilet seat detected by the toilet seat temperature detecting means. (For example, refer to Patent Document 1).

  In addition, a metal toilet seat with a heating means attached to the back surface, an opening / closing means interposed between the heating means and the commercial power source, and heating from the commercial power source by the opening / closing means only when the user approaches the toilet seat There is disclosed a heating toilet seat device comprising control means for energizing the means, and provided with another heating means for heat insulation on the back surface of the toilet seat (for example, see Patent Document 2).

  In addition, the toilet seat unit, a heating element that heats the toilet seat unit, a temperature detection unit that detects the temperature of the toilet seat unit, a human body detection unit that detects the presence of the user, and a control unit, the control unit is a human body When the presence of the user is detected by the detection unit, the heating element is energized, and the temperature of the toilet seat rises with a first temperature gradient to the limit temperature that is the lowest temperature of the toilet seat that the user does not feel cold. Thus, after driving for the first time with the first power, the temperature of the toilet seat rises to a temperature higher than the toilet seat set temperature preset by the user with a second temperature gradient that is gentler than the first temperature gradient. Thus, a toilet seat device is disclosed in which the heating element is driven for a second time with a second electric power smaller than the first electric power (see, for example, Patent Document 3).

Japanese Patent Laid-Open No. 2007-7018 JP 2003-79539 A Japanese Patent No. 4140627

  However, according to Patent Document 1, by determining the predetermined time for energizing the heater, which is a heat source, according to the temperature of the toilet seat, the temperature of the toilet seat can reach the seatable temperature in the minimum necessary time. However, a plurality of energization rates of electric power supplied to the heater for a certain period of time after human body detection are determined in advance, and are not determined according to the toilet seat temperature at the time of human body detection, and each time a person enters the room. Electric power with a high constant energization rate is supplied to the heater. Therefore, in a toilet seat device installed in a public facility where people frequently enter or exit, or in a toilet seat device that is used continuously during the same time for commuting to and from school, the temperature of the toilet seat varies depending on the time of day. There is a problem that becomes too high.

  The toilet seat temperature control of the toilet seat device is not a feedback control that compares the seatable temperature (target value) with the toilet seat detection temperature (control amount) and supplies power to the power source based on this comparison value, but an open loop control. Made by. For this reason, even if an abnormality occurs in the heater, there is a problem that electric power is supplied to the heater as usual, and a comfortable toilet seat temperature for seating cannot be obtained.

  Further, according to Patent Document 2, when the control unit detects that a person has entered the toilet room by the human body detection sensor, the difference between the preset temperature of the toilet seat and the toilet seat temperature at the time when the person is detected is detected. Accordingly, in correlation with the environmental temperature, electric power is supplied to the heater, which is a heating means, and the toilet seat is rapidly heated. However, since the heater wire is cooled to the same temperature as the toilet seat until power is supplied to the heater, the electrical resistance of the heater is small, and a large current flows to the heater at the start of energization, resulting in an overcurrent. Due to this overcurrent, the performance of other electrical equipment in the toilet room may deteriorate, or the energization of the indoor breaker may be interrupted.

  In addition, the temperature of the toilet seat heating is controlled by open-loop control of energization of the heater based on a preset duty value of electric power without feeding back the detected temperature of the toilet seat. For this reason, even if an abnormality occurs in the heater, there is a problem that electric power is supplied to the heater as usual, and a comfortable toilet seat temperature for seating cannot be obtained.

  Further, according to Patent Document 3, when the presence of the user is detected, the control unit detects the temperature of the toilet seat and performs energization control on the heating element based on the heater control table corresponding to the detected temperature. Toilet seat temperature control is open-loop control, not feedback control. The heater control table takes into account the room temperature of the toilet room to some extent, but is not sufficient, and does not consider the body temperature when a person is seated on the toilet seat. For this reason, there is a problem that the temperature of the toilet seat deviates from the toilet seat set temperature.

  In Patent Documents 1 to 3, as described above, the toilet seat is heated based on the heater control table without feeding back the detected toilet seat temperature. For this reason, even if an abnormality occurs in the heater, there is a problem that electric power is supplied to the heater as usual, and a comfortable toilet seat temperature for seating cannot be obtained. Furthermore, when the voltage fluctuation of the power source that supplies power to the heater occurs, there is a problem that the temperature of the toilet seat is not heated to the toilet seat set temperature.

  The present invention has been made in view of the above problems, and provides a toilet seat heating apparatus that can more appropriately control power supplied to a heating element disposed in a toilet seat and suppress overcurrent at the start of toilet seat heating. With the goal.

  In order to solve the above-mentioned problems, the invention described in claim 1 is directed to a toilet seat, an entrance detection means for detecting the approach of a person to the toilet seat, a heating element provided in the toilet seat for heating the toilet seat, and a temperature of the toilet seat. Temperature detection means, a controller for duty-controlling the power supplied to the heating element, and the toilet seat heating set temperature and temperature detection means that have been detected for a certain period of time from the time of detection of the approach of a person's toilet seat by the entry detection means Deviation reduction that outputs a reduction deviation smaller than the deviation obtained by subtracting the toilet seat detection temperature from the toilet seat heating set temperature based on the toilet seat detection temperature, and outputs either the deviation or the reduction deviation to the controller after a certain period of time. And the controller calculates a duty for supplying power to the heating element based on the output of the deviation reducing means, and calculates the duty to be supplied to the heating element. To control, is that.

  Further, the invention according to claim 2 is that the deviation reducing means sets a certain time based on the toilet seat detection temperature when the approach detection means detects the approach of a person's toilet seat.

  According to a third aspect of the present invention, the deviation reducing means includes a low-pass filter for reducing the toilet seat heating set temperature to a heating fluctuation target temperature lower than the toilet seat heating set temperature, and the toilet seat detection temperature from the reduced heating fluctuation target temperature. And an adder that calculates the subtracted reduction deviation, and outputs the calculated reduction deviation to the controller.

  Further, in the invention described in claim 4, the deviation reducing means subtracts the moving average calculated from the toilet seat heating set temperature and the moving average calculating means for calculating the moving average of the toilet seat heating set temperature and the toilet seat detected temperature. An adder for calculating a reduction deviation, and outputting the calculated reduction deviation to a controller.

The invention described in Claim 5, the deviation reducing means, a weighted moving average calculating means for calculating a weighted moving average of the toilet seat heating set temperature and the toilet seat detected temperature, weighted moving average calculated from the toilet seat heating set temperature And an adder for calculating a reduction deviation obtained by subtracting the difference, and outputting the calculated reduction deviation to a controller.

  In the invention according to claim 6, the deviation reducing means includes an adder for calculating a deviation obtained by subtracting a toilet seat detection temperature detected by the temperature detection means from the toilet seat heating set temperature, and an initial deviation connected to the adder. And the initial deviation reducing means is based on the toilet seat heating set temperature and the toilet seat detection temperature detected by the temperature detection means after the detection of a person's toilet seat approach. And a deviation reducer that outputs a reduction deviation smaller than the deviation obtained by subtracting one of the toilet seat detection temperatures from the time of toilet seat approach detection, and a deviation reducer from the time of detection of a person's toilet seat approach by the entry detection means to a certain time And a changeover switch for outputting the deviation calculated by the adder to the controller after a predetermined time has elapsed.

  Further, the invention described in claim 7 is a toilet seat, an entrance detection means for detecting the approach of a person to the toilet seat, a heating element that is disposed on the toilet seat and heats the toilet seat, and a temperature detection means for detecting the temperature of the toilet seat. Calculate the deviation of the set toilet seat heating set temperature of the toilet seat from the toilet seat detection temperature detected by the temperature detection means, and supply it to the heating element based on the output and the deviation output from the adder A controller that outputs a basic duty that is the target of the duty that controls the power to be output, and an initial reduced duty that is reduced from the basic duty that is output from the controller until a certain period of time after the person's seat approach is detected by the entrance detection means After a certain period of time, the initial duty that outputs either the initial reduced duty or the basic duty output from the controller Comprising a reduction means, based on the output of the initial duty reducing means, duty control of the power supplied to the heating element, is that.

  In the first aspect of the present invention, the deviation reducing means detects the toilet seat from the set temperature of the toilet seat at least for a predetermined time from the time when the approach of the person to the toilet seat is detected by the entry detecting means (hereinafter, when the approach of the toilet seat is detected). A reduction deviation smaller than the deviation obtained by subtracting the detected temperature is calculated and output to the controller. Thereby, at least for a fixed time from the time when the toilet seat approach is detected, the target value of the heating temperature of the toilet seat is lower than the toilet seat heating set temperature and fluctuates continuously or stepwise as time passes. And a controller calculates the duty of the electric power supplied to a heat generating body (henceforth a heater) based on the reduction | deviation deviation which considered the fluctuation | variation of the target value of heating temperature. The electric power supplied to the heater is duty-controlled based on the calculated duty, and this supplied electric power is reduced to be less than the electric power supplied by the duty based on the deviation obtained by subtracting the toilet seat detection temperature from the toilet seat heating set temperature. Therefore, in the toilet seat heating device of the present invention, the electric power reduced based on the target temperature lower than the toilet seat heating set temperature is supplied to the heater from the time of the toilet seat approach detection to at least a certain time, and the electric power based on the toilet seat heating set temperature is small. As a result, it is possible to suppress overcurrent that occurs when the temperature of the heater at the start of power supply is low and the electrical resistance is low, and it is possible to prevent degradation of the performance of other electrical devices in the toilet room or interruption of the indoor breaker.

  Further, the toilet seat detected temperature detected by the temperature detecting means is fed back, and the heater is heated by supplying power to the heater based on the duty calculated by the controller. As a result, the toilet seat heating device of the present invention can be controlled to an appropriate toilet seat temperature corresponding to a resistance change of the heater or an abnormality in the toilet seat temperature, and can be controlled by an environmental temperature such as the temperature of the toilet room, the body temperature of the user, or the power supply source. The toilet seat can be heated to a predetermined temperature without being affected by voltage fluctuations.

  In the second aspect of the present invention, the fixed time is set based on the toilet seat detection temperature when the approach of the person to the toilet seat is detected by the deviation reducing means. By setting this fixed time, a current suitable for the electrical resistance of the heater is applied from the time of detection of approaching the toilet seat to the fixed time, even if the electrical resistance of the heater is low. The electric resistance becomes high, and a current large enough to heat rapidly can be applied. As a result, the toilet seat heating device of the present invention can prevent the performance degradation of other electrical devices in the toilet room or the interruption of the indoor breaker.

  In the invention according to claim 3, the heating fluctuation target temperature output from the low-pass filter is lower than the toilet seat heating set temperature, gradually approaches the toilet seat heating set temperature with the passage of time, and changes with the passage of time. This is the target value of the heating temperature. Thereby, the reduction deviation calculated by the adder and subtracting the toilet seat detection temperature from the heating fluctuation target temperature is smaller than the deviation obtained by subtracting the toilet seat detection temperature from the toilet seat heating set temperature. This reduction deviation is transmitted to the controller.

  In the invention according to claim 4, the moving average of the toilet seat temperature output from the moving average calculating means is lower in temperature than the toilet seat heating set temperature, and gradually approaches the toilet seat heating set temperature as time passes, It is the target value of the heating temperature of the toilet seat that changes with time. Thereby, the reduction deviation calculated by the adder and subtracting the toilet seat detection temperature from the moving average of the toilet seat temperature calculated by the moving average calculation means is smaller than the deviation obtained by subtracting the toilet seat detection temperature from the toilet seat heating set temperature. This reduction deviation is transmitted to the controller.

  In the invention according to claim 5, the moving average of the toilet seat temperature output from the weighted moving average calculating means is lower in temperature than the toilet seat heating set temperature, and gradually approaches the toilet seat heating set temperature as time elapses. It is the target value of the heating temperature of the toilet seat that changes with the passage of time. Thereby, the reduction deviation calculated by the adder and subtracting the toilet seat detection temperature from the moving average of the toilet seat temperature calculated by the weighted moving average calculation means is smaller than the deviation obtained by subtracting the toilet seat detection temperature from the toilet seat heating set temperature. This reduction deviation is input to the controller.

  In addition, in the invention described in claim 6, from the time of detection of approaching the toilet seat to a certain time, a reduction deviation smaller than the deviation obtained by subtracting the toilet seat detection temperature from the toilet seat heating set temperature is output by the deviation reducer of the initial deviation reduction means. Is transmitted to the controller. Thereby, the target value of the heating temperature of the toilet seat is lower than the set temperature of the toilet seat heating for a certain period of time after the toilet seat approach detection.

  Further, after a predetermined time has elapsed, the controller transmits a deviation obtained by subtracting the toilet seat detection temperature from the toilet seat heating set temperature by the adder, so that a feedback control system is formed. As a result, the toilet seat heating device of the present invention can be controlled to an appropriate toilet seat temperature corresponding to a resistance change of the heater or an abnormality in the toilet seat temperature, and can be controlled by an environmental temperature such as the temperature of the toilet room, the body temperature of the user, or the power supply source. The toilet seat can be heated to the toilet seat heating set temperature without being affected by the voltage fluctuation.

  In the invention according to claim 7, the deviation between the toilet seat heating set temperature calculated by the adder and the toilet seat detection temperature is input to the controller. Based on the input deviation, the controller calculates a basic duty that is a target of the duty for controlling the power supplied to the heating element (heater), and outputs the basic duty to the initial duty reduction means. The initial duty reduction means outputs a reduced duty in which the basic duty is reduced at least for a predetermined time from the time when the toilet seat approach is detected, and the supplied power is duty-controlled based on this reduced duty and the power is supplied to the heater. Accordingly, the supply power based on the reduced duty from the time of toilet seat approach detection to at least a certain time is less than the supply power based on the basic duty. As a result, overcurrent that occurs when the heater temperature is low and the electrical resistance is low at the initial stage of power supply to the heater is suppressed, and it is possible to prevent performance degradation of other electrical equipment in the toilet room or interruption of the indoor breaker.

  Further, the toilet seat detection temperature detected by the temperature detection means is fed back to the adder, and the adder calculates the deviation between the toilet seat heating set temperature and the toilet seat detection temperature. The calculated deviation is sequentially transmitted to the controller and the initial duty reduction means, and electric power is supplied to the heater based on the duty output from the initial duty reduction means, so that the toilet seat is heated to the toilet seat heating set temperature. Therefore, a feedback control system for controlling the toilet seat temperature by feeding back the toilet seat detection temperature is formed. As a result, the toilet seat heating device of the present invention can be controlled to an appropriate toilet seat temperature corresponding to a resistance change of the heater or an abnormality in the toilet seat temperature, and can be controlled by an environmental temperature such as the temperature of the toilet room, the body temperature of the user or the power supply source The toilet seat can be heated to the toilet seat heating set temperature without being affected by the voltage fluctuation.

It is a perspective view of the heating toilet seat which concerns on Examples 1-5. It is the disassembled perspective view which looked at the toilet seat part of FIG. 1 from the upper side. It is explanatory drawing of the heater part of FIG. It is a block diagram of the toilet seat heating control system of the toilet seat heating apparatus of Example 1. It is a heating and heat retention control flowchart of the toilet seat heating apparatus of Example 1. It is a figure which shows progress of the heating fluctuation target temperature at the time of toilet seat heating of Example 1, the detection temperature (toilet seat detection temperature) of a thermistor, and the electric power supplied to a heater. It is a block diagram of the toilet seat heating control system of the toilet seat heating apparatus which concerns on Example 2. FIG. It is a block diagram of the toilet seat heating control system of the toilet seat heating apparatus which concerns on Example 3. FIG. It is a block diagram of the toilet seat heating control system of the toilet seat heating apparatus which concerns on Example 4. FIG. FIG. 10 is a block diagram according to the present invention obtained by modifying the block diagram of FIG. 9. It is a block diagram of the toilet seat heating control system of the toilet seat heating apparatus which concerns on Example 5. FIG.

  Embodiments of the present invention will be described below in detail with reference to the drawings.

Example 1
FIG. 1 is a perspective view of a heating toilet seat according to Examples 1 to 5, and FIG. 2 is an exploded perspective view of the toilet seat portion of FIG. 1 as viewed from below. FIG. 3 is an explanatory view of the heater unit bonded to the back surface of the toilet seat of FIG. 2 and is a view seen from below.

  The heating toilet seat 100 includes a toilet seat portion 2, a main body portion 7, and a toilet seat heating device 1 arranged across the toilet seat portion 2 and the main body portion 7. The toilet seat 2 includes a toilet seat 2a formed of metal, a lower toilet seat cover 2b, and a heater unit 3 installed between the toilet seat 2a and the lower toilet seat cover 2b. The heater unit 3 is composed of a linear heater (heating element) 3a and metal foils 3b and 3b including an insulating film for sandwiching the heater 3a, and is bonded to the back surface 2c of the toilet seat 2a. Note that the heater unit 3 may sandwich a heating resistor, in which a metal foil is patterned by etching or printing processing, with an insulating film.

  The toilet seat heating device 1 includes a toilet seat 2a, a heater 3a, a thermistor (temperature detection means) 4 that is installed in the heater section 3 and detects the temperature of the toilet seat 2a, and an entrance detection means 5 that detects the approach of a person to the toilet seat. And a control unit 6 that is housed in the main body unit 7 and controls the toilet seat temperature. In the present embodiment, the control unit 6 is installed inside the main body unit 7, but may be arranged on a remote controller installed on the wall of the toilet room or the like other than the inside of the main body unit 7. .

The thermistor 4 is attached to the metal foil 3b on the lower surface of the heater unit 3, and the temperature of the toilet seat 2a is detected by the thermistor 4 through the heater unit 3 (FIG. 3). Here, the detection temperature _{T S} of the thermistor 4 temperature of the toilet seat 2a (hereinafter, the toilet seat detected temperature _{T S)} and.

  The entrance detection means 5 detects the approach of a person to the toilet seat 2a when a person enters the toilet room, and a human body detection sensor such as a pyroelectric infrared sensor or a reflective infrared sensor is used. In the present embodiment, the heating toilet seat 100 is provided at the upper left corner in FIG. The pyroelectric infrared sensor generates an ON signal when a person who is an object moves, and the reflective infrared sensor detects infrared light reflected from the person and detects that the person has entered the toilet room. Further, instead of the human body detection sensor, a switch that detects the user's stepping into the toilet room, for example, a switch that is turned on / off in conjunction with opening / closing of the door of the toilet room may be used. Or the switch which detects opening and closing of a toilet seat upper cover (not shown) may be used.

4, the toilet seat heating set temperature T ₀ to a preset target value (input), the control amount (output) at seat detected temperature T _S to the toilet seat heating system 1 for heating seat control system block diagram B1 of is there. The block diagram B <b> 1 is formed by the deviation reducing means 9 and the controller 10 disposed in the control unit 6, the heater circuit 40, and the thermistor 4. The deviation reducing means 9 includes a low-pass filter 20 (hereinafter referred to as LPF 20) and an adder 8. The heater circuit 40 includes a heater 3a of the heater unit 3 bonded to the back surface of the toilet seat 2a and a switch such as a triac that is disposed on the control unit 6 and is turned on / off based on a duty of electric power output from the controller 10 described later. 41, and is connected to a power source (for example, a 50-Hz single-phase AC power source) 42.

The low-pass filter 20 reduces the preset toilet seat heating set temperature T ₀ after the time when the person entering the toilet room is detected by the entrance detection means 5, and is heated at a temperature lower than the toilet seat heating set temperature T _0. and it outputs a fluctuation target value _{T 1.} Heating fluctuation target value T ₁ is asymptotic to the toilet seat heating set temperature T ₀ with time. Then, the heating fluctuation target value T ₁ becomes the target value of the heating temperature of the toilet seat 2a at each time point.

The adder 8 is a summing point seat detected temperature T _S is fed back as input heating fluctuation target value T ₁ and the toilet seat detected temperature T _S, minus the seat detected temperature T _S from the heating fluctuation target value T ₁ A reduction deviation ΔT _1S (= T ₁ −T _S ) is calculated and output. This output is transmitted (output) to the controller 10 (FIG. 6).

The controller 10, the overshoot suppression control the transmitted reduced deviation [Delta] T _1S (e.g., PID control) while by suppressing overshoot of the toilet seat detected temperature T _S, as the toilet seat temperature is the toilet seat heating set temperature T ₀ It controls and outputs the duty of the suitable electricity supply rate of the electric power (for example, 50-Hz alternating current power) of the power supply 42 supplied to the heater 3a. Based on this duty, the power supplied to the heater 3a is duty controlled. That is, based on the output duty, on / off of the switch 41 for supplying / stopping the power to the heater 3a so that the supply of the supplied power is phase-controlled by a zero cross detection unit (not shown) provided in the control unit 6. An off signal is output.

By the above, the block diagram B1, the controller output of the toilet seat heating set temperature T ₀ which is input to the LPF 20, i.e. the heating varies the target temperature T _1, reducing the deviation [Delta] T _1S of the detected temperature T _S of the fed-back thermistor 4 10, based on the duty output from the controller 10, the power of the power source 42 is supplied to the heater 3 a at an appropriate energization rate, and the toilet seat 2 a is heated to the toilet seat heating set temperature T ₀ to form a feedback control system. doing.

  Next, the operation and effect of the toilet seat heating apparatus 1 according to the first embodiment of the present invention will be described. FIG. 5 is a flowchart for heating and heat insulation control of the toilet seat 2a of the toilet seat heating apparatus 1. Here, Step 1 to Step 8 are each step for heating the toilet seat 2a, and Step 1 and Step 9 to Step 11 are each step for keeping the toilet seat 2a warm. When toilet seat heating control is started, the following steps are sequentially performed.

(Step 1)
Whether the person approaches the toilet seat 2a (whether a person has entered the toilet room) is detected by the entry detection means 5. When a person enters the toilet room, the room detection means 5 is turned on and the process proceeds to Step 2. If the room has not been entered, the room entry detection means 5 is off and the process proceeds to Step 9.

(Step 2)
Toilet seat detected temperature _{T S} is detected by the thermistor 4, the process proceeds to Step3.

(Step 3)
The toilet seat heating set temperature T ₀ preset by the user is confirmed, and the process proceeds to Step 4. The toilet seat heating set temperature T ₀ can be set to any one of three temperatures (high 40 ° C., medium 38 ° C., low 36 ° C.), for example.

(Step 4)
The toilet seat heating set temperature T ₀ is input to the LPF 20, and the heating fluctuation target temperature T ₁ reduced to a temperature lower than the toilet seat heating set temperature T ₀ is output from the LPF 20, and the process proceeds to Step 5.

(Step 5)
A reduction deviation ΔT _1S (= T ₁ −T _S ) between the heating fluctuation target temperature T ₁ and the toilet seat detection temperature T _S detected by the thermistor 4 is calculated by the adder 8 and output to the controller 10. Next, it progresses to Step6.

(Step 6)
Based on the reduction deviation ΔT _1S output to the controller 10, the controller 10 controls the toilet seat temperature to be the toilet seat heating set temperature T ₀ while performing PID control, and sets the duty of the power supplied to the heater 3a to the heater circuit 40. Output to. Next, it progresses to Step7.

In the PID control, the reduction deviation ΔT _1S is proportional, integrated, and differentiated as shown by the arithmetic expression {K _P (ΔT _1S ) + K _D s (ΔT _1S ) + K _I (ΔT _1S ) / s}. Here, s is a Laplace operator and represents time differentiation, and 1 / s represents time integration. K _P , K _I , and K _D are constants, which are a proportional gain, an integral gain, and a differential gain of PID control, respectively.

(Step 7)
Whether the person leaves the toilet room is detected by the entrance detection means 5. In the case of leaving the room, the room entry detecting means 5 is turned off and the process proceeds to Step 8. In the case of occupancy, the on-detection means 5 is kept on, and the process returns to Step 4 to continue heating the toilet seat 2a.

(Step 8)
A timer (not shown) of the heater unit 3 is operated, and the process returns to Step 7 until 60 seconds from the start of the timer operation. When it is detected that the person is not in the toilet room for 60 seconds, it is determined that the person has left the toilet room, and the toilet seat heating control ends.

(Step 9)
As described above, the entrance detection means 5 at Step 1 is off, the toilet seat temperature is detected by the thermistor 4, and the process proceeds to Step 10.

(Step 10)
The thermistor 4 detects whether the temperature of the toilet seat 2a is equal to or lower than a preset toilet seat heat retention temperature T _C (for example, 15 ° C.). If it is the toilet seat warm set temperature _{T C} or less, proceed to Step11. If more than a toilet seat warm set temperature _{T C,} it returns to Step1.

(Step 11)
The toilet seat 2a is kept warm at a preset toilet seat warming temperature T _C (for example, 15 ° C.). In this case, similarly to the seat seat heating controls, toilet seat kept set temperature T _C which has been input is reduced by LPF 20. Then, a reduction deviation ΔT _2S (= T ₂ −T _S ) between the heat retention variation target temperature T ₂ and the toilet seat detection temperature T _S detected by the thermistor 4 is calculated by the adder 8 and output to the controller 10. . Then, based on the reduced deviation [Delta] T _2S output, the controller 10 while the PID control, the toilet seat temperature is controlled to be toilet seat kept set temperature T _C, the supply power for the thermal insulation supplied to the heater 3a The duty is output to the heater circuit 40. Based on this duty, the switch 41 is repeatedly turned on and off, the power of the power source 42 is supplied to the heater 3a at an appropriate energization rate, the toilet seat 2a is kept warm, and the toilet seat warming control is terminated.

  When the toilet seat heating / warming control ends, the steps of toilet seat heating / warming control are repeated again at preset time intervals.

In addition, although the block diagram of heat insulation of the toilet seat 2a is not shown in figure, heat insulation is made based on the block diagram B1 of FIG. In this case, the input of the toilet seat heating set temperature T ₀ in the block diagram B1 is, change places in the input of the toilet seat kept set temperature T _C. An input of the toilet seat heating set temperature T _0, the switching of the input warmth set temperature T _C is performed by the changeover switch that is deployed in the control unit 6 (not shown).

FIG. 6 shows the progress of the heating fluctuation target temperature T ₁ during heating of the toilet seat 2a, the toilet seat detection temperature (detection temperature of the thermistor 4) T _S , and the power supply W supplied to the heater 3a. In the figure, _{W 0} denotes the rated output of the power supply 42 of _{AC100V, T S1} denotes a seat sensing temperature at the entrance detecting.

When the step-like toilet seat heating set temperature T ₀ is input to the LPF 20, the low frequency component included in the toilet seat heating set temperature T ₀ is passed by the LPF 20, the high frequency component is reduced, and the heating fluctuation target temperature T ₁ is set. It is output from the LPF 20 (Step 4 in FIGS. 4 and 5). Thus, as shown in FIG. 6, the heating fluctuation target temperatures T _1, at the time of initial rise, it does not rise stepwise rises while smoothly increases over time. From the time the toilet seat heating set temperature T ₀ is input to the LPF 20 until the time t ₂ (for example, 1.5 seconds), the heating fluctuation target temperature T ₁ is lower than the toilet seat heating set temperature T ₀ . The time t ₂ later, the heating fluctuation target temperatures T ₁ over time while asymptotically the toilet seat heating set temperature T _0, is substantially the same as the toilet seat heating set temperature T _0. As described above, the heating fluctuation target temperatures T ₁ is the target value of the heating temperature of the toilet seat 2a at each time point, the target value changes over time.

Electric power supplied to the heater 3a (hereinafter, supply power), the time t ₁ from the time of entrance detecting human _(e.g., 0.8 seconds) until the on-off lower switch 41 of proper duty is repeated, time Stand up while increasing with the passage of time. In time point t _1, compared with the entrance detecting the temperature of the heater 3a is made sufficiently high, the electrical resistance increases. Then, the rated output W ₀ (W) of the power source 42 is supplied to the heater 3a after time t ₁ from the time of entry detection. After time t ₃ (for example, 2.3 seconds) from the time of entry detection, the supplied power is gradually reduced. This power reduction, overshoot of the toilet seat detected temperature T _S is suppressed, the time from the time of entrance detecting t _{4 (e.g.,} 3.3 second) after the toilet seat 2a is substantially the toilet seat heating set temperature T ₀ is the target temperature To reach.

Here, time t _{0 in} FIG. 6 is a fixed time set by the deviation reducing means 9 based on the toilet seat detection temperature at the time of entry detection. Specifically, the predetermined time t ₀ is set by the zero cross detection number of the commercial power supply (for example, AC 50 Hz 100 V) by the zero cross detection unit of the control unit 6 corresponding to the toilet seat detection temperature T _S1 . The predetermined time t ₀ is set to suppress the overcurrent, the predetermined time t ₀ from the time of entrance detecting, heater 3a is not warm enough, the electric resistance is in a low state, compatible with the low resistance value An appropriate current is passed through the heater 3a. After a certain period of time, the electric resistance increases due to the temperature rise of the heater 3a, and a current large enough to rapidly heat can be supplied to the heater 3a.

As described above, the heating fluctuation target temperature T ₁ is sufficiently lower than the toilet seat heating set temperature T ₀ at a certain time t ₀ from the time when a person enters the room, so the toilet seat detection temperature T _S is subtracted from the heating fluctuation target temperature T _1. was reduced deviation [Delta] T _1S is the deviation [Delta] T _0S smaller than minus the toilet seat heating set temperature _{T 0} Karakara seat detected temperature _{T S.} In a certain time t ₀ from the time of entrance detecting, with heating varies the target temperatures T ₁ rises with increased smoothly, the duty of the supply power at the time of rising of the start toilet seat heating, as shown in FIG. 6, the supply power gradually It is output from the controller 10 so as to increase. Therefore, in the toilet seat heating apparatus 1 of the present embodiment, the inrush current at the start of energization of the heater 3a is suppressed to be small and the overcurrent is suppressed in a state where the temperature of the heater 3a is low and the electrical resistance is low at the start of energization. . As a result, it is possible to prevent the performance degradation of other electrical equipment in the toilet room or the interruption of the indoor breaker.

Further, as described above, the toilet seat heating system 1 of the present invention, the toilet seat detected temperature T _S are fed back, a feedback control system toilet seat temperature is controlled is formed. Therefore, as compared with the toilet seat heating apparatus in which the supply power and the output time of the prior art are mapped, the toilet seat heating apparatus 1 of this embodiment has an appropriate toilet seat temperature corresponding to the resistance change of the heater 3a or the abnormality of the toilet seat temperature. The toilet seat can be heated to the toilet seat heating set temperature T ₀ without being influenced by the temperature of the toilet room, the environmental temperature such as the user's body temperature, or the voltage fluctuation of the power source 42.

Further, the deviation ΔT _1S transmitted to the controller 10 is subjected to overshoot suppression control such as PID control, for example, by the controller 10, the overshoot of the toilet seat detection temperature T _S is suppressed, and the toilet seat detection temperature T _S in a short time. Reaches the target temperature. As described above, the toilet seat heating apparatus 1 according to the present embodiment can heat the toilet seat 2a to the toilet seat heating set temperature in a short time with a small amount of electric power.

(Example 2)
FIG. 7 is a block diagram of a toilet seat heating control system for heating the toilet seat 2a of the toilet seat heating apparatus 1 (FIG. 1) according to the present invention. As shown in FIG. 7, in the block diagram B2 of the toilet seat heating control system of the toilet seat heating device 1 of the present embodiment, the LPF 20 in the block diagram B1 of FIG. That is, the block diagram B2 is formed by the deviation reducing means 9a and the controller 11, the heater circuit 40, and the thermistor (temperature detecting means) 4 arranged in the control unit 6 (FIG. 1). The heater circuit 40 includes a heater 3a (a heating element) of the heater unit 3 adhered to the back surface of the toilet seat 2a, a switch 41 that is disposed in the control unit 6 and is turned on / off based on the duty of electric power output from the controller 11. Are connected to the power source 42. The deviation reducing means 9 a is composed of a moving average calculating means 21 and an adder 8.

The block diagram B2, the target value of the toilet seat heating set temperature T ₀ seat heating (input), the control amount (output) and the toilet seat detected temperature T _SN, by feeding back the seat detected temperature T _SN to the adder 8 based on the duty output from the controller 11, power is supplied to the heater 3a, seat 2a is formed of a feedback control system which is heated to a toilet seat heating set temperature T _0. The toilet seat detection temperature T _SN is a toilet seat temperature detected by the thermistor 4 at a predetermined time interval Δt, and N is N = 1, 2,.

The input of the moving average calculation means 21 is a preset toilet seat heating set temperature T ₀ and a toilet seat detection temperature T _S1 detected by the thermistor 4 when a person enters the toilet room. The output of the moving average calculating means 21 is a moving average calculated by the moving average calculating means 21 sequentially with the toilet seat heating set temperature T ₀ and the toilet seat detection temperature T _S1 detected when entering the room. That is, when a person entering the room is detected by the room entry detecting means 5, the moving average calculating means 21 sequentially moves the moving average T _{0S1 of} the toilet seat heating set temperature T ₀ and the toilet seat detected temperature T _S1 detected at the time of entering the room (= (T ₀ + T _S1 ) / 2)), toilet seat heating set temperature T ₀ and moving average T _0S1 moving average T _0S2 (= (T ₀ + T _0S1 ) / 2)), ... toilet seat heating set temperature T ₀ And the moving average T _{0S (N−1)} , the moving average T _0SN (= (T ₀ + T _{0S (N−1)} ) / 2)) is calculated sequentially, and the moving average calculating means is calculated at a predetermined time interval Δt. 21 is output as a heating fluctuation target value.

Then, the moving averages T _0S1 , T _0S2 ,... T _0SN output from the moving average calculating means 21 are input to the adder 8, and the discrete moving averages T _0S1 , T _0S2,. · · _T seat detected from _0SN temperature _{T S1, T S2, ··· T} 0SN is reduced deviation [Delta] T _M1 and discrete been deducted each, ΔT _M2, ··· ΔT _MN is calculated. The calculated decrease deviations ΔT _M1 , ΔT _M2 ,... ΔT _MN are input to the controller 11. For example, the controller 11 controls the toilet seat temperature to be the toilet seat heating set temperature T ₀ while performing overshoot suppression control such as PID control, and sets the appropriate duty of the power supplied to the heater 3 a to the heater circuit 40. Output to. Based on this duty, is supplied power duty control to the heater 3a, power is supplied at a proper duty ratio to the heater 3a, seat 2a is heated in the toilet seat heating set temperature T _0.

The moving averages T _0S1 , T _0S2 ,... T _0SN that are the heating fluctuation target values are smaller than the toilet seat heating set temperature T ₀ and are the target values of the heating temperature of the toilet seat 2a, and at a certain time t ₀ from the time of entry detection. It gradually increases and gradually approaches the toilet seat heating set temperature T ₀ while changing over time. Accordingly, the aforementioned decrease deviations ΔT _M1 , ΔT _M2 ,... ΔT _MN are smaller than a deviation ΔT _0S (= T ₀ −T _S ) obtained by subtracting the toilet seat detection temperature T _S from the toilet seat heating set temperature T ₀ .

  As described above, the toilet seat heating apparatus 1 of the present embodiment produces the same effect based on the same operation as the toilet seat heating apparatus 1 of the first embodiment.

Example 3
FIG. 8 is a block diagram of a toilet seat heating control system for heating the toilet seat 2a of the toilet seat heating apparatus 1 (FIG. 1) according to the present invention. As shown in FIG. 8, in the block diagram B3 of the toilet seat heating control system of the heating apparatus 1 of the present embodiment, the moving average calculating means 21 in the block diagram B2 (FIG. 7) is replaced with the weighted moving average calculating means 22. . That is, the block diagram B3 of the toilet seat heating control system of the toilet seat heating apparatus 1 includes a deviation reducing means 9b and a controller 12, a heater circuit 40, and a thermistor (temperature detecting means) 4 arranged in the control unit 6 (FIG. 1). And formed by. The heater circuit 40 includes a heater 3a (a heating element) of the heater unit 3 adhered to the back surface of the toilet seat 2a, and a switch 41 that is disposed in the control unit 6 and is turned on / off based on the duty of the supplied power output from the controller 12. And connected to the power source 42. The deviation reducing unit 9b includes a weighted moving average calculating unit 22 and an adder 8.

The block diagram B3 shows that the toilet seat heating set temperature T ₀ is the target value (input) of the toilet seat heating, the control amount (output) is the toilet seat detection temperature T _SN , and the toilet seat detection temperature T _SN is fed back to the adder 8. based on the duty output from the controller 12, power is supplied to the heater 3a, seat 2a is formed of a feedback control system which is heated to a toilet seat heating set temperature T _0. The toilet seat detection temperature T _SN is a toilet seat temperature detected by the thermistor 4 at a predetermined time interval Δt, and N is N = 1, 2,.

The inputs of the weighted moving average calculating means 22 are a preset toilet seat heating temperature T ₀ and a toilet seat detection temperature T _S1 detected by the thermistor 4 when a person enters the toilet room. The output of the weighted moving average calculating means 22 is a weighted moving average calculated by the weighted moving average calculating means 22 sequentially with the toilet seat heating set temperature T ₀ and the toilet seat detection temperature T _S1 detected when entering the room.

That is, the weighted moving average calculating means 22 sequentially calculates the weighted moving average T _0SW1 (= (T ₀ + 1 × T _S1 ) / 2) between the toilet seat heating set temperature T ₀ and the toilet seat detection temperature T _S1 detected when entering the room. weighted moving average _T with the toilet seat heating set temperature _{T 0} and the weighted moving average _{T 0SW1 0SW2 (= (T 0} + 2 × T 0SW1) / (2 + 1)), ··· toilet seat heating set temperature _{T 0} and weighted moving average _{T 0SW (N-1)} and the weighted moving average _T 0SWN of _{(= (T 0 + N ×} T 0SW (N-1)) / (2 + N-1)) are sequentially calculated, weighted moving average at a predetermined time interval Δt It is output from the computing means 22 as a heating fluctuation target value.

Then, the weighted moving averages T _0SW1 , T _0SW2 ,... T _0SWN output from the weighted moving average calculating means 22 are input to the adder 8, and the discrete weighted moving averages T _0SW1 , T ₀ are added by the adder 8. _0SW2, ··· _T seat detected from _0SWN temperature _{T S1, T S2, ··· T} SN are each subtracted reduced deviation and discrete and _{ΔT W1, ΔT W2, ··· ΔT} WN is calculated. The calculated decrease deviations ΔT _W1 , ΔT _W2 ,... ΔT _WN are input to the controller 12. For example, the controller 12 performs control so that the toilet seat temperature becomes the toilet seat heating set temperature T ₀ while performing overshoot suppression control such as PID control, and sets the appropriate duty of the power supplied to the heater 3 a to the heater circuit 40. Output to. Based on this duty, is supplied power duty control to the heater 3a, power is supplied at a proper duty ratio to the heater 3a, seat 2a is heated in the toilet seat heating set temperature T _0.

The weighted moving averages T _0SW1 , T _0SW2 ,... T _0SWN which are the heating fluctuation target values are smaller than the toilet seat heating set temperature T ₀ and are the target values of the heating temperature of the toilet seat 2a, and are constant time t ₀ from the time of entry detection. Gradually increases and gradually approaches the toilet seat heating set temperature T ₀ while changing over time. Therefore, the aforementioned decrease deviations ΔT _W1 , ΔT _W2 ,... ΔT _WN are smaller than the deviation ΔT _0S (= T ₀ −T _S ) obtained by subtracting the toilet seat detection temperature T _S from the toilet seat heating set temperature T ₀ .

  As described above, the toilet seat heating apparatus 1 of the present embodiment produces the same effect based on the same operation as the toilet seat heating apparatus 1 of the first embodiment.

  In Examples 2 and 3, the heating / heat retention control flowchart of FIG. 5 can be applied.

Example 4
FIG. 9 is a block diagram of a toilet seat heating control system for heating the toilet seat 2a of the toilet seat heating apparatus 1 (FIG. 1) according to the present invention. As shown in FIG. 9, the block diagram B4 of the toilet seat heating control system of the toilet seat heating device 1 of the present embodiment includes a deviation reducing means 9c and a controller 13 disposed in the control unit 6 (FIG. 1), and a heater circuit 40. And the thermistor 4 (temperature detection means). The heater circuit 40 includes a heater 3a (a heating element) of the heater unit 3 adhered to the back surface of the toilet seat 2a, a switch 41 that is disposed in the control unit 6 and is turned on / off based on the duty of electric power output from the controller 13. Are connected to the power source 42.

In the block diagram B4, the LPF 20 of the block diagram B1 in FIG. 4 is removed, and an initial deviation reducing means 30 is provided between the adder 8 and the controller 13. The block diagram B4, the target value of the toilet seat heating set temperature T ₀ seat heating (input), the control amount (output) and the toilet seat detected temperature T _S, by feeding back the seat detected temperature T _S to the adder 8 Then, the deviation ΔT _0S (= T ₀ −T _S ) output from the adder 8 is transmitted to the controller 13, and electric power is supplied to the heater 3 a based on the duty output from the controller 13 to heat the toilet seat 2 a. It consists of a feedback control system.

The deviation reducing means 9 c is composed of an adder 8 and an initial deviation reducing means 30. The initial deviation reduction means 30 includes a deviation reducer 31, a timer 32, and a changeover switch 33. The timer 32 is set to a fixed time t ₀ for switching the changeover switch 33. The change-over switch 33 is connected to the contact c from the time when the entry of the person is detected by the entry detection means 5 until the fixed time t ₀ set in the timer 32, and after the fixed time t _{0 has} elapsed, b is connected to contact c.

Certain time t _0, as described above, is set by the deviation reducing means 9c based on the toilet seat temperature detected at the time of entrance detecting.

The deviation reducer 31 is a reduction deviation ΔT (for example, smaller than the deviation ΔT _0S1 = (T ₀ −T _S1 )) between the toilet seat heating set temperature T ₀ and the toilet seat detection temperature T _S1 detected by the thermistor 4 when a person enters the room. A temperature difference of a constant value, a temperature difference that changes in a stepwise manner with respect to time, a temperature difference proportional to time, or a moving average temperature, etc.) is generated and output. In this case, the deviation reducer 31 acts as a function generator.

Alternatively, the deviation reducer 31 is a reduction deviation smaller than the deviation ΔT _0S = (T ₀ −T _S ) between the toilet seat heating set temperature T ₀ and the toilet seat detection temperature T _S detected by the thermistor 4 from when the person enters the room. ΔT is calculated and output. In this case, the deviation reducer 31 functions as a low-pass filter, for example. In any case, the deviation reducer 31 transmits the reduced deviation ΔT to the controller 13 for a fixed time t ₀ from the time when a person enters the room, that is, while the contact a of the changeover switch 33 is connected to the contact c.

In any of the above cases, the reduction deviation ΔT output from the deviation reducer 31 is smaller than the deviation ΔT _0S1 , so the target value of the heating temperature of the toilet seat 2a is the toilet seat heating until a certain time t ₀ from the time of entering the room. It becomes lower than the set temperature T ₀ temperature.

The reduction deviation ΔT including information on the target value of the heating temperature is transmitted to the controller 13. For example, the controller 13 performs control so that the toilet seat temperature becomes the toilet seat heating set temperature T ₀ while performing overshoot suppression control such as PID control, and sets the appropriate duty of the power supplied to the heater 3 a to the heater circuit 40. Output to. Based on this duty, the power supplied to the heater 3a is duty controlled.

As described above, since the target value of the toilet seat heating temperature is set lower than the toilet seat heating set temperature T ₀ from the time when the person's entry is detected until the predetermined time t ₀ , the supply power has the target value of the toilet seat heating temperature. Compared to the case of the toilet seat heating set temperature T ₀ , it becomes smaller. Therefore, in the toilet seat heating apparatus 1 of the present embodiment, the inrush current at the start of energization of the heater 3a is suppressed to be small, and the overcurrent is suppressed. As a result, it is possible to prevent the performance degradation of other electrical equipment in the toilet room or the interruption of the indoor breaker.

After a certain time t _{0 has} elapsed, that is, the contact b of the changeover switch 33 is connected to the contact c, and the toilet seat heating temperature target value becomes the toilet seat heating set temperature T ₀ . Then, the adder 8 calculates a deviation ΔT _0S (= T ₀ −T _S ) between the toilet seat heating set temperature T ₀ and the toilet seat detection temperature T _S, and transmits the deviation ΔT _0S to the controller 13. Based on the transmitted deviation ΔT _0S , the controller 13 performs control so that the toilet seat temperature becomes the toilet seat heating set temperature T ₀ while performing overshoot suppression control such as PID control, and the appropriate power supplied to the heater 3a. A large duty is output to the heater circuit 40. Based on this duty, power proper duty ratio to the heater 3a is supplied, the toilet seat 2a is heated in the toilet seat heating set temperature T _0. Thus, after a predetermined time t ₀ has elapsed, the toilet seat heating device 1 of this embodiment the toilet seat detected temperature T _S, which is detected by the thermistor 4 is fed back to the adder 8, a feedback control system for heating a seat 2a is formed The Further, deviation reducer 31, for example, even when functioning as a low pass filter, the toilet seat heating device 1 of this embodiment, the toilet seat detected temperature T _S, which is detected by the thermistor 4 is fed back, a feedback control for heating the toilet seat 2a A system is formed.

As described above, the toilet seat heating apparatus 1 according to the present embodiment can be controlled to an appropriate toilet seat temperature in response to a resistance change of the heater 3a or an abnormality of the toilet seat temperature, and can be controlled to an environmental temperature such as the temperature of the toilet room or the body temperature of the user. The toilet seat can be heated to the toilet seat heating set temperature T ₀ regardless of the voltage fluctuation of the power source 42.

Further, the reduction deviation ΔT and the deviation ΔT _0S input to the controller 13 are subjected to overshoot suppression control such as PID control by the controller 13, and the overshoot of the toilet seat detection temperature T _S is suppressed, and the toilet seat is quickly reduced. the detected temperature _{T S} reaches the toilet seat heating set temperature _{T 0.} As a result, the toilet seat heating apparatus 1 according to the present embodiment can heat the toilet seat 2a to a predetermined temperature in a short time with less power.

  In addition, although the block diagram B4 of the toilet seat heating apparatus 1 of a present Example has the initial deviation reduction means 30 provided between the adder 8 and the controller 13, it is not limited to this. That is, instead of the initial deviation reducing means 30, for example, between the adder 8 and the controller 13, the low pass filter of the first embodiment, the moving average calculating means of the second embodiment, and the weighted moving average calculating means of the third embodiment. Any one of them may be provided.

FIG. 10 is a block B5 of the toilet seat heating control system of the heating apparatus 1 of the present invention in which the low pass filter 23 is provided between the adder 8 and the controller 13, and the adder 8 and the low pass filter 20 are configured to reduce the deviation 9d. Is configured. The low-pass filter 23 reduces the deviation ΔT _{0S obtained} by subtracting the toilet seat detection temperature T _S from the toilet seat heating set temperature T ₀ , and this reduced reduction deviation is transmitted to the controller 13.

When the moving average calculating means is provided, the binomial moving average based on the two deviations sequentially output from the adder 8 is calculated by the moving average calculating means. That is, the moving average computing unit, sequentially, average _{ΔM 1 = (ΔT 0S1 + ΔT} 0S2) / 2, the deviation [Delta] T _0S2 and the deviation [Delta] T of the next time the deviation [Delta] T _0S2 deviation [Delta] T _0S1 and the next time when the entrance detecting average of the _{0S3 ΔM 2 = (ΔT 0S2 +} ΔT 0S3) / 2, ···, average of the deviation [Delta] T _0S2 and the deviation [Delta] T _0S3 of the next time _{ΔM N = (ΔT 0SN + ΔT} 0S (N + 1)) / 2 is calculated And sequentially output from the moving average calculation means.

Further, when the weighted moving average calculating means is provided, the binomial weighted moving average based on the two deviations sequentially output from the adder 8 is calculated by the weighted moving average calculating means. That is, by the weighted moving average calculating means, sequentially with the deviation [Delta] T _0S2 deviation [Delta] T _0S1 and the next time when the entrance detecting average _{ΔW 1 = (ΔT 0S1 + 1} × ΔT 0S2) / 2, the deviation [Delta] T _0S2 and the next time average of the deviation ΔT _0S3 ΔW of _{2 = (ΔT 0S2 + 2 ×} ΔT 0S3) / (2 + 1), ···, average of the deviation [Delta] T _0SN the next time deviation _{ΔT 0S (N + 1) ΔW} N = (ΔT 0SN + N × ΔT _{0S (N + 1)} ) / (2 + N−1) is calculated and sequentially output from the weighted moving average calculating means.

  N is N = 1, 2,..., N.

In addition, the heating and heat insulation control flow of Example 4 differs from the heating and heat insulation control flow of Example 1 (FIG. 5). That is, Step 4a is provided between Step 3 and Step 4 in FIG. 5 to determine whether or not a predetermined time t _{0 has} elapsed since the detection of the person entering the room. Further, a deviation calculation Step 5a for calculating the deviation ΔT _0S by the adder 8 when the determination in the determination Step 4a has elapsed is added, and the deviation calculation Step 5a leads to the PID control of Step 6.

  If the determination at determination step 4a is negative, the process proceeds to step 4 of FIG. If the determination in determination step 4a has elapsed, the process proceeds to deviation calculation step 5a and step 6 in FIG. Step 7 human body detection OFF? The determination No returns to the determination Step 4a.

(Example 5)
FIG. 11 is a block diagram of a toilet seat heating control system for heating the toilet seat 2a of the toilet seat heating apparatus 1 (FIG. 1) according to the present invention. As shown in FIG. 11, a block diagram B6 of the toilet seat heating device 1 of this embodiment includes an adder 8 and a controller 14 disposed in the control unit 6 (FIG. 1), a low-pass filter (initial duty reduction means, hereinafter , LPF) 24, heater circuit 40, and thermistor (temperature detection means) 4. The heater circuit 40 includes a heater 3a (heating element) of the heater unit 3 adhered to the back surface of the toilet seat 2a, a switch 41 that is disposed in the control unit 6 and is turned on / off based on the duty of the electric power output from the LPF 24, And is connected to the power source 42.

The adder 8 calculates a deviation ΔT _0S (= T ₀ −T _S ) based on the input toilet seat heating set temperature T ₀ and the toilet seat detection temperature T _S detected by the thermistor (temperature detection means) 4. The deviation ΔT _0S is transmitted (output) to the controller 14.

Based on the transmitted deviation ΔT _0S , the controller 14 performs toilet shot temperature control, such as PID control, in order to cause the toilet seat detection temperature T _S to reach the toilet seat heating set temperature T ₀ in a short time. Is set to the toilet seat heating set temperature T ₀ , and the basic duty Y that is the target of the power supplied to the heater 3 a is transmitted (output) to the LPF 24.

The LPF 24 reduces the high-frequency component included in the transmitted basic duty Y and passes the low-frequency component, so that the LPF 24 is smaller than the basic duty Y, gradually increases at the beginning of heating, and becomes the basic duty Y over time. Output asymptotic initial reduced duty. Since the initial reduction duty is less than the basic duty Y, the target value of the toilet seat heating temperature is smaller than the toilet seat heating set temperature T _0.

  The power supplied to the heater 3a is duty-controlled based on the initial reduction duty described above, and the switch 41 is appropriately turned on and off repeatedly, so that the electric power with an appropriate energization rate is supplied to the heater 3a.

Due to the initial reduction duty, the supply power at the time of start-up of the toilet seat heating is controlled to gradually increase for a certain time t ₀ from the time when the person enters the room. Asymptotically approach the power supply rate based on the power supply. The power supply, the toilet seat detected temperature T _S is also at the rise of the toilet seat heating early, gradually increases, asymptotic to the toilet seat heating set temperature T ₀ with time, heating seat 2a is in the toilet seat heating set temperature T ₀ Is done. Therefore, in the toilet seat heating device 1 of the present embodiment, in the state where the temperature of the heater 3a at the start of energization is low and the electrical resistance is small, the inrush current at the start of energization of the heater 3a is suppressed, and the overcurrent is suppressed. It is possible to prevent the deterioration of the performance of other electrical equipment in the toilet room or the interruption of the indoor breaker.

Here, the fixed time t ₀ is set by the LPF 24 based on the toilet seat detection temperature T _S at the time of entry detection. The predetermined time t ₀ is set to suppress the overcurrent, the predetermined time t ₀ from the time of entrance detecting, heater 3a is not warm enough, the electric resistance is in a low state, compatible with the low resistance value An appropriate current is passed through the heater 3a. After a certain period of time, the electric resistance increases due to the temperature rise of the heater 3a, and it is possible to pass a current that is large enough to heat rapidly.

Further, the toilet seat heating device 1 of this embodiment, the toilet seat detected temperature T _S, which is detected by the thermistor 4 is fed back to the adder 8, the deviation [Delta] T _0S output from the adder 8 are sequentially to the controller 14, LPF 24 Then, the initial reduced duty is output from the LPF 24. Based on this initial reduction duty, the power supplied to the heater 3a is duty-controlled, and appropriate power is supplied to the heater 3a. Therefore, the toilet seat heating apparatus 1 of the present embodiment can be controlled to an appropriate toilet seat temperature in response to a resistance change of the heater 3a or an abnormality in the toilet seat temperature, and an environmental temperature such as the temperature of the toilet room, the body temperature of the user, or the power source. The toilet seat can be heated to the toilet seat heating set temperature T ₀ regardless of the voltage fluctuation of 42.

Further, the controller 14, the overshoot suppression control on the input deviation [Delta] T _0S (e.g., PID control, etc.), inhibits overshoot of the toilet seat detected temperature _{T S.} Thus, the toilet seat heating device 1 of this embodiment, a small power, the toilet seat detected temperature T _S is heated to a toilet seat heating set temperature T ₀ in a short time.

  In the block diagram B6 of the toilet seat heating apparatus 1 of the present embodiment, the LPF 24 is provided on the output side of the controller 14, but instead of the LPF 24, the above-described moving average calculating means (FIG. 7), weighted moving average Any one of the calculation unit (FIG. 8) and the initial duty reduction unit having the same configuration as the initial deviation reduction unit (FIG. 9) may be provided as the initial duty reduction unit.

When the moving average calculating means is provided, the moving average calculating means sequentially calculates the moving average M ₁ = (Y ₁ + Y ₂ ) between the basic duty Y ₁ at the time of entering the room and the basic duty Y ₂ at the next time point. / 2, moving average M _{2 of} basic duty Y ₂ and basic duty Y ₃ at the next time point = (Y ₂ + Y ₃ ) / 2,..., Basic duty Y _N and basic duty Y _{N + 1} at the next time point The moving average M _N = (Y _N + Y _{(N + 1)} ) / 2 is calculated. The moving averages M ₁ , M ₂ ,..., _MN are smaller than the basic duties Y ₁ , Y ₂ ,..., Y _N , and asymptotically approach the basic duty as time passes to supply power to the heater 3a. The duty to be output is sequentially output from the moving average calculation means. The above N is N = 1, 2,.

When the weighted moving average calculating means is provided, the weighted moving average calculating means sequentially calculates the weighted moving average W ₁ of the basic duty Y ₁ at the time of entering the room and the basic duty Y ₂ at the next time point = (Y ₁ + 1 × Y ₂ ) / 2, weighted moving average W ₂ = (Y ₂ + 2 × Y ₃ ) / (2 + 1) of basic duty Y ₂ and basic duty Y ₃ at the next time point, basic duty Y _N and next The weighted moving average W _N = (Y _N + N × Y _{(N + 1)} ) / (2+ (N−1) with the basic duty Y _{N + 1} at the time is calculated as follows: Weighted moving average W ₁ , W ₂ ,. , W _N are smaller than the basic duties Y ₁ , Y ₂ ,..., Y _N , and gradually approach the basic duty as time elapses, and are sequentially supplied from the weighted moving average calculating means as the duty for supplying power to the heater 3a. Is output.

Further, in the case of the initial duty reduction means having the same configuration as the initial deviation reduction means, from the time of entry detection to the constant time t ₀ , the initial duty reduction means outputs an initial reduction duty smaller than the basic duty for a constant time. After t _{0 has} elapsed, the basic duty is output.

1 Toilet seat heating device 2a Toilet seat 3a Heater (heating element)
4 Thermistor (temperature detection means)
DESCRIPTION OF SYMBOLS 5 Entry detection means 6 Control part 8 Adder 9, 9a, 9b, 9c, 9d Deviation reduction means 10, 11, 12, 13, 14 Controller 20 Low-pass filter 21 Moving average calculating means 22 Weighted moving average calculating means 24 Low-pass filter ( (Initial duty reduction means)
30 Initial deviation reduction means 31 Deviation reducer 33 selector switch

Claims (7)

Toilet seat and
A room entry detecting means for detecting the approach of a person to the toilet seat;
A heating element that is disposed on the toilet seat and heats the toilet seat;
Temperature detecting means for detecting the temperature of the toilet seat;
A controller for duty-controlling the power supplied to the heating element;
From the time of detection of approaching a person's toilet seat by the entry detection means to a certain time, the toilet seat detection temperature is determined from the toilet seat heating setting temperature based on the set toilet seat heating setting temperature and the toilet seat detection temperature detected by the temperature detection means. Deviation reduction means for outputting a reduction deviation smaller than the deviation obtained by subtracting to the controller, and outputting one of the deviation and the reduction deviation to the controller after the fixed time has elapsed,
With
The toilet seat heating device, wherein the controller calculates a duty for supplying electric power to the heating element based on an output of the deviation reducing means, and duty-controls the electric power supplied to the heating element. The toilet seat heating device according to claim 1, wherein the deviation reducing unit sets the certain time based on the toilet seat detection temperature when the approach detection unit detects the approach of a person's toilet seat. The deviation reducing means calculates a reduction deviation by subtracting the toilet seat detection temperature from the reduced heating fluctuation target temperature, and a low-pass filter that reduces the toilet seat heating setting temperature to a heating fluctuation target temperature lower than the toilet seat heating setting temperature. The toilet seat heating device according to claim 1, further comprising: an adder configured to output the reduced deviation calculated to the controller. The deviation reducing means calculates a moving average calculation means for calculating a moving average between the toilet seat heating set temperature and the toilet seat detection temperature, and calculates the reduction deviation obtained by subtracting the moving average calculated from the toilet seat heating set temperature. The toilet seat heating device according to claim 1, further comprising an adder, wherein the calculated reduction deviation is output to the controller. The deviation reducing means, a weighted moving average calculating means for calculating a weighted moving average of said toilet seat heating set temperature and the toilet seat sensing temperature, said reduced deviation obtained by subtracting the weighted moving average calculated from the toilet seat heating set temperature The toilet seat heating device according to claim 1, further comprising: an adder that calculates the difference, and outputting the calculated reduction deviation to the controller. The deviation reduction means includes an adder that calculates a deviation obtained by subtracting a toilet seat detection temperature detected by the temperature detection means from the toilet seat heating set temperature, and an initial deviation reduction means connected to the adder,
The initial deviation reducing means is based on the toilet seat heating set temperature and the toilet seat detection temperature detected by the temperature detection means after the detection of a person's toilet seat approach. A deviation reducer that outputs a reduction deviation smaller than a deviation obtained by subtracting one of the toilet seat detection temperatures after the approach detection; and
From the time of detection of approaching a person's toilet seat by the entrance detection means to a predetermined time, the reduction deviation output from the deviation reducer is output to the controller, and after the fixed time has elapsed, the calculated by the adder. A changeover switch for outputting a deviation to the controller;
The toilet seat heating device according to claim 1, wherein the toilet seat heating device is provided. Toilet seat and
A room entry detecting means for detecting the approach of a person to the toilet seat;
A heating element that is disposed on the toilet seat and heats the toilet seat;
Temperature detecting means for detecting the temperature of the toilet seat;
An adder that calculates and outputs a deviation obtained by subtracting the toilet seat detection temperature detected by the temperature detection means from the set toilet seat heating set temperature of the toilet seat;
Based on the deviation output from the adder, a controller that outputs a basic duty that is a duty target for duty-controlling the power supplied to the heating element;
From the time of detection of approaching a person's toilet seat by the entrance detection means to a predetermined time, an initial reduced duty that is reduced from the basic duty output from the controller is output, and after the predetermined time has elapsed, the initial reduced duty, Initial duty reduction means for outputting one of the basic duties output from the controller;
With
The toilet seat heating device, wherein duty control is performed on power supplied to the heating element based on an output of the initial duty reduction means.

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