JP5605747B2 - Toilet seat device - Google Patents

Description

  The present invention relates to a toilet seat device, for example, a heating toilet seat device that heats a toilet seat.

  The heating toilet seat device generates heat by constantly applying a voltage to a heating wire built in the toilet seat, and always warms the toilet seat to a desired temperature set by the heat. Accordingly, the heating toilet seat device prevents the user from feeling uncomfortable due to the coldness of the toilet seat when sitting on the toilet seat, and the user can comfortably sit on the toilet seat.

  In such a heated toilet seat device, it is desired to control the toilet seat temperature so that the power consumption when the toilet is not used is reduced as much as possible, while the toilet seat can be seated on a comfortable seat when the toilet is used. Therefore, in the past, when a human body entering a toilet room was detected using a pyroelectric infrared sensor while the standby temperature of the toilet seat was kept low in order to reduce power consumption when the toilet was not used, there was a human body detection. There is known an immediately warming type heating toilet seat device that raises the temperature of a toilet seat from a standby temperature to a target seating temperature (Patent Document 1). Such an immediately warming type heated toilet seat device is a device that rapidly heats the toilet seat when the user uses the toilet bowl, and can reduce the standby temperature when the toilet bowl is not used, which is effective in reducing power consumption. is there.

JP 2009-165684 A Japanese Patent No. 40686648

  However, the conventional immediately warming type heating toilet seat device detects the human body after entering the toilet room and raises the temperature from the standby temperature to the target seating temperature. Normally, the time from entering the room to sitting is at most about 6 seconds, and when the user is lightly dressed, the time from entering the toilet room to sitting on the toilet seat is about 4 seconds. In other words, there is a limit to the time for raising the temperature from the standby temperature to the seating temperature. Therefore, there is a possibility that the conventional immediate warm type heating toilet seat device cannot raise the toilet seat to a comfortable temperature at the time of sitting. Alternatively, the standby temperature is set to a high value at the expense of energy saving in order to reliably raise the toilet seat to a comfortable temperature when the user is seated even for a short time.

  In order to reduce the power consumption while raising the toilet seat to a comfortable temperature at the time of sitting, it is conceivable to increase the heating capability of the heater and heat the toilet seat in a short time. However, increasing the heating capability of the heater creates a safety problem. Further, when the heater has a high temperature raising capability, there arises a problem that wasteful power consumption increases when the temperature of the toilet seat is raised even when urination is not required, even when the toilet seat is not needed.

  Therefore, in order to reduce power consumption while maintaining the heating capability of the heater low, it is desirable to lengthen the heating time so that the temperature can be surely raised to a comfortable temperature even from a low standby temperature. In order to lengthen the temperature rising time in this way, a method using an electric light switch is conceivable in order to start temperature rising control by warming immediately before the user enters the toilet room (Patent Document 2). However, the toilet light switch is usually installed in the vicinity of the toilet, and the temperature raising time cannot be made too long.

  In addition, it is conceivable to increase the temperature raising time by installing the infrared sensor at a position far from the toilet room. However, when trying to determine whether a user has entered with a highly directional infrared sensor, a plurality of infrared sensors are installed in a corridor or the like outside the toilet room, and the heating control of each of the infrared sensors and the heating toilet seat device is linked. It is necessary to let It is not practical to use such a method only for immediate warming control of the toilet seat.

  Moreover, even if the distance from the toilet room to the user can be grasped by installing the infrared sensor, the time until the user enters the toilet room from that position is the time of the house from that position to the toilet room. It depends on the form of the passage and the walking speed of the user. That is, the time from when the sensor detects the user until entering the toilet room is not simply determined from the position information. For this reason, in the conventional heating toilet seat device that simply starts warming based on the position information, the toilet seat may not be heated to a comfortable temperature at the time of sitting.

  As described above, in the conventional immediate warming type heated toilet seat device, the temperature of the toilet seat is raised to a comfortable temperature at the time when the user is seated, and the standby temperature of the toilet seat is reduced as much as possible to reduce power consumption. It was difficult to achieve both.

  Further, in the conventional toilet seat device, before the user enters the toilet room, the temperature of the toilet seat is started based on the fixed start determination value. Therefore, when the user sets the standby temperature low, There was a problem that the toilet seat temperature could not be raised to a comfortable temperature at the time of sitting because the performance could not catch up.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to make the temperature of the toilet seat comfortable when the user is seated while reducing the power consumption of the toilet seat with respect to the set standby temperature. It is to provide a heated toilet seat device capable of reliably raising the temperature to a certain temperature.

In order to solve the above-described problems, a toilet seat device according to the present invention includes a toilet seat unit installed in a toilet room, a heating unit that heats the toilet seat unit, a radio wave, and an intensity of a reflected wave of the radio wave. a sensor unit for detecting a human body users outside of the toilet room by comprising a control unit for controlling the heating unit and the sensor unit, wherein the control unit, the toilet seat Atsushi Nobori by the heating unit Is determined by whether or not the intensity of the reflected wave in the sensor unit that detects the human body of the user who is outside the toilet room is equal to or higher than a start determination value, and the reflection in the sensor unit the time from when the intensity of the wave is equal to or greater than the start determination value until the user entering the toilet room and approaches the time, at the time the user is seated on the toilet seat unit As the temperature of the serial toilet seat unit has reached the target temperature from the standby temperature, to determine the start determination value, characterized that you ensure the standby temperature the approach time according to.

  In the conventional toilet seat device, before the user enters the toilet room, the temperature of the toilet seat is started based on a fixed start determination value. Therefore, when the user sets the standby temperature low, the temperature increase performance is There is a possibility that the toilet seat temperature cannot be raised to a comfortable temperature at the time of sitting without catching up, but in the present invention, the start determination value is determined based on the approach time determined by setting the standby temperature. Therefore, the temperature of the toilet seat can be reliably raised to a comfortable temperature while the power consumption of the toilet seat is reduced and the user is seated. Furthermore, in the present invention, since the start determination value for determining the timing for starting the temperature rise is determined based on the approach time determined by setting the standby temperature, for example, the user sets the standby temperature low. Even in this case, since the start determination value is changed so that the approach time becomes longer, the toilet seat temperature can be raised to a comfortable temperature at the time of sitting.

  In this case, the toilet seat apparatus may further include standby temperature setting changing means for the user to manually change the setting of the standby temperature.

  As a result, the user can manually change the standby temperature setting, and the standby temperature can be changed according to the user's preference. For this reason, for example, the standby temperature can be set flexibly in accordance with the preference of temperature setting by young and old, the change in season, and the like. Even if the standby temperature is changed in this way, the start determination value is determined based on the approach time determined by setting the standby temperature, and thus the toilet seat at the time when the user is seated while reducing power consumption of the toilet seat. Can be reliably raised to a comfortable temperature.

Further, the control unit stores an approach time corresponding to the standby temperature based on an actual intensity of the reflected wave detected by the sensor unit, and an intensity of the reflected wave corresponding to the stored approach time. May be used as the start determination value.

  Thus, the setting accuracy of the start determination value can be increased by determining the start determination value based on the actual measurement value detected by the sensor unit. As a result, the temperature of the toilet seat at the time when the user is seated can be reliably raised to a comfortable temperature while further reducing power consumption.

  Further, a plurality of approach times may be set in advance for the standby temperature, and may be selected from the plurality of approach times.

  This makes it possible to select an approach time that is more suitable for the use environment, and to further reduce power consumption. For example, the approach time can be appropriately selected from a plurality of approaches based on the housing situation such as the direction of the doors of the toilet room and the layout of the corridor, or based on the family structure such as the presence or absence of children or the elderly. Immediate warming control according to the configuration can be performed. That is, it is possible to perform immediate warming control so as to reliably raise the temperature of the toilet seat at a user's seating time to a comfortable temperature while reducing power consumption according to the use situation and use environment. .

  In this case, the plurality of approach times may be selected according to the housing situation.

  Thus, by selecting the approach time according to the housing situation, it is possible to further increase the setting accuracy of the start determination value determined based on the approach time. For example, depending on the environment (door, wall, passage form, etc.) where the heated toilet seat is installed, the radio wave radiation intensity outside the toilet room may vary, and the approach time may change. Assuming such a case, if the approach time can be selected according to the housing situation, the temperature of the toilet seat at the time of the user's seating can be reduced while adapting to the housing situation and reducing power consumption. Immediate warming control can be performed to reliably raise the temperature to the temperature.

  In addition, the start determination value has a minimum start value that is a lower limit of the value, and when the start determination value determined based on the approach time is lower than the minimum start value, the start determination value is The minimum start value may be set.

  That is, there is a limit to the measurement accuracy of the sensor unit, and if the start determination value is smaller than a predetermined value, the measurement signal value of the sensor unit may not be properly recognized. For this reason, if the start determination value is determined based on the standby temperature and the approach time, there is a possibility that the measurement signal value start determination value cannot be detected by the sensor unit. Therefore, by setting the start determination value with a lower limit, it becomes possible to set the start determination value within the range of measurement values that can be actually measured by the sensor unit. As a result, the start determination value setting accuracy Can be increased.

  In this case, the standby temperature may be increased and set based on an approach time determined according to the minimum start value of the start determination value.

  In other words, if the start determination value is raised to the minimum start value, the toilet seat cannot be raised to the target temperature rise at the time of sitting at the set standby temperature. The temperature is also adjusted upward so that the temperature of the toilet seat is low so that the user does not feel uncomfortable when sitting.

  In addition, after the temperature of the toilet seat is started by the heating unit, the standby temperature is corrected by using a result of whether the user actually enters the room or whether the user actually does not enter the room. Good.

  In this way, after the heating unit starts to heat up the toilet seat, the standby temperature is corrected by correcting the standby temperature based on whether the user has actually entered the room or whether the user has actually entered the room. And the start determination value can be made more appropriate, and the power consumption can be further reduced. For example, even if it is estimated that the user will enter the room, but the non-entry estimation that the user does not enter occurs but the occurrence frequency is low, if the standby temperature is set low, the non-entry estimation is almost The overall power consumption can be kept lower than the high standby temperature setting. Accordingly, by appropriately correcting the correspondence between the frequency of non-entry estimation and the setting of the standby temperature, it is possible to make an appropriate setting in consideration of the balance between the two and to improve the user's feeling of use. .

  According to the present invention, it is possible to provide a heating toilet seat device that can reliably raise the temperature of a toilet seat at a user's seating point to a comfortable temperature while reducing power consumption of the toilet seat with respect to a set standby temperature. .

The figure which shows detection area DR1, DR2 of the toilet apparatus 100 according to 1st Embodiment which concerns on this invention, the toilet room 105, and the sensor part 150. FIG. The block diagram which shows the structure of the toilet seat apparatus 110 by 1st Embodiment. The figure which shows the voltage waveform of the electromagnetic wave detected by the sensor part 150, or infrared rays. The figure which shows an example of the control data table of a reference | standard table. The figure which shows the graph of the relationship between the total time Ttotal and the temperature of the toilet seat part 140 in the case where standby temperature TEMPstb is 26 degreeC and 23 degreeC. The figure which shows an example of a structure of the adaptation table TB20 which is stored in the memory | storage part 214 of the control part 210 which concerns on 1st Embodiment. The figure which shows the flowchart explaining an example of the immediate warming control process performed with the toilet seat apparatus 110 shown in FIG. The figure which shows an example of a structure of the adaptation table TB40 which is stored in the memory | storage part 214 of the control part 210 which concerns on 2nd Embodiment. The figure which shows the flowchart explaining an example of the adaptive table switching process performed with the toilet seat apparatus 110 which concerns on 2nd Embodiment. The conceptual diagram which shows the toilet apparatus 100 which concerns on 3rd Embodiment, the structure of the toilet room 105, and a user's approach direction. The figure which shows an example of a part of structure in the adaptation table TB40 which is stored in the memory | storage part 214 of the control part 210 which concerns on 3rd Embodiment. The figure which shows the flowchart explaining an example of the adaptive table switching process performed with the toilet seat apparatus 110 which concerns on 3rd Embodiment. The figure which shows the flowchart explaining an example of the adaptive table correction | amendment process based on the non-room entrance estimation performed with the toilet seat apparatus 110 which concerns on 4th Embodiment. The figure which shows an example of the adaptation table TB20 in the state which correct | amended the adaptation table TB20 shown in FIG. 6 by the adaptation table correction process of FIG.

  Embodiments according to the present invention will be described below with reference to the drawings. This embodiment does not limit the present invention.

(First embodiment)
FIG. 1A and FIG. 1B are diagrams showing detection areas DR1 and DR2 of the toilet device 100, the toilet room 105, and the sensor unit 150 according to the first embodiment of the present invention. The toilet apparatus 100 is installed in a toilet room 105 and includes a toilet seat apparatus 110 and a toilet bowl 120. The toilet seat device 110 is a heating toilet seat device that includes a remote control device (remote controller) 130, a toilet seat 140, a sensor 150, and a controller 210. The toilet seat part 140 has a built-in heater as a heating part. The toilet seat 140 is heated by supplying current to the heater. The sensor unit 150 includes a radio wave sensor 160, a pyroelectric sensor 170, and a seating sensor 180. The toilet room 105 is a space surrounded by a wall 106 and a door 107, and the user enters the toilet room 105 through the door 107.

  The radio wave sensor 160 is, for example, a radio wave sensor that uses a microwave frequency band. The microwave sensor emits a radio wave beam toward a predetermined detection area, and detects an object such as a human body that has entered the detection area. Further, since the microwave sensor uses the Doppler effect (standing wave), it can detect the movement (speed) of the object. Furthermore, the microwaves pass through materials having a relatively low relative dielectric constant such as wood, resin, and ceramics. Therefore, the microwave sensor can detect a human body outside the toilet room 105 and can detect a moving state (speed) of the human body.

  Microwave is one of the classifications based on the frequency of radio waves. Generally, it refers to a radio wave (electromagnetic wave) having a wavelength of 100 micrometers to 1 meter and a frequency of 300 megahertz to 3 terahertz. Radio waves in this range include decimeter waves (UHF), centimeter waves (SHF), millimeter waves (EHF), and submillimeter waves. The radio wave sensor 160 only needs to be able to detect the user's human body outside the toilet room 105, and the available frequency band is not limited to the microwave band.

  The pyroelectric sensor 170 is, for example, a pyroelectric infrared sensor, and detects that the user has entered the toilet room 105. The pyroelectric infrared sensor detects the difference between the temperature of the surrounding environment and the temperature of the object to be detected, and determines whether an object exists in the space. In this embodiment, the pyroelectric sensor 170 is installed in the toilet seat device 110 in order to detect the human body of the user who has entered the toilet room 105. However, the present invention is not limited to the pyroelectric infrared sensor.

  The seating sensor 180 is, for example, a reflective infrared sensor, and detects that a user is seated on the toilet seat 140 when infrared light reflected from the human body is detected. The seating sensor 180 is not limited to the reflective infrared sensor as long as it can detect that the user is seated on the toilet seat 140.

  The radio wave sensor 160 and the pyroelectric sensor 170 may be attached to the toilet seat device 110 and / or the toilet 120 or the remote control device 130, or separately from the toilet seat device 110 and the remote control device 130, the wall surface and ceiling in the toilet room 105. Or you may attach to a floor surface.

  The first detection region DR1 indicates a range in which the radio wave sensor 160 can detect a human body, and extends outside the toilet room 105. The second detection area indicates a range in which the pyroelectric sensor 170 can detect a human body, and is limited to the inside of the toilet room 105.

  FIG. 2 is a block diagram illustrating a configuration of the toilet seat device 110 according to the first embodiment. The toilet seat device 110 includes a remote control device 130, a sensor unit 150, a toilet seat unit 140, a cleaning unit 200, and a control unit 210.

  The remote operation device 130 includes a function setting unit 132, a function operation unit 134, and a display unit 136. The function setting unit 132 is a means for the user to input / select various setting items such as the temperature setting of the toilet seat 140 and the water temperature setting of the cleaning device 200. The function operation unit 134 is a means for the user to operate the toilet seat device 110 and the cleaning device 200 based on the setting items set by the function setting unit 132. The display unit 136 is a unit that displays items input / selected by the user using the function setting unit 132 or the function operation unit 134. The function setting unit 132 and the function operation unit 134 include, for example, a button and a changeover switch, and the user sets and operates the toilet seat apparatus 110 by pressing the button or switching the changeover switch. The display unit 136 may be a liquid crystal display device, for example.

  As described above, the sensor unit 150 includes the radio wave sensor 160, the pyroelectric sensor 170, and the seating sensor 180. The radio wave sensor 160 includes a transmission antenna 162, an oscillation circuit 164, a reception antenna 166, and a detection circuit 168. In the present embodiment, the oscillation circuit 164 generates a radio wave (microwave) having a predetermined frequency and transmits the radio wave from the transmission antenna 162. The reception antenna 166 receives the reflected wave of the radio wave transmitted from the transmission antenna 162. The detection circuit 168 extracts a frequency difference (detection signal) from the reflected wave received by the reception antenna 166, and sends the detection signal to the control unit 210. If the oscillation circuit 164 includes a frequency variable circuit, not only the moving speed of the human body but also the distance from the radio wave sensor 160 to the human body can be recognized from the phase state of the reflected wave. If a plurality of detection circuits 168 are provided, it is possible to identify whether the human body is approaching or moving away from the radio wave sensor 160 from the phase difference between the plurality of detection signals.

  The pyroelectric sensor 170 includes a lens that sets a detection region and a light receiving element that receives infrared rays emitted from the human body. The seating sensor 180 emits infrared rays and infrared reflected waves transmitted from the light emitting elements. A light receiving element for receiving is provided, and the result received by the light receiving element is sent to the control unit 210.

  The toilet seat unit 140 includes a heater 142 as a heating unit and a temperature detection unit (thermistor) 144. The heater 142 heats the toilet seat 140 under the control of the controller 210. The temperature detection unit 144 detects the temperature of the toilet seat unit 140 and feeds back the temperature information to the control unit 210.

  The cleaning unit 200 includes a heater 202, a temperature detection unit (thermistor) 204, and a nozzle driving unit 206. The heater 202 heats the cleaning water stored in the tank in the cleaning unit 200 under the control of the control unit 210. The temperature detector 204 detects the temperature of the cleaning water and feeds back the temperature information to the controller 210. The nozzle driving unit 206 is configured to drive the nozzle and discharge cleaning water.

  The control unit 210 includes an arithmetic processing unit (CPU) 212, a storage unit 214, a timer 216, and a counter 218, and controls the remote operation device 130, the sensor unit 150, the toilet seat unit 140, and the washing unit 200. It is configured.

  FIG. 3 is a diagram showing a radio wave or infrared voltage waveform detected by the sensor unit 150. A voltage waveform detected by the radio wave sensor 160 is indicated by W1, a voltage waveform detected by the pyroelectric sensor 170 is indicated by W2, and a voltage waveform detected by the seating sensor 180 is indicated by W3. These voltage waveforms W <b> 1 to W <b> 3 are waveforms in a desired frequency band obtained by filtering the received wave received by the sensor unit 150 using a frequency band filter included in the control unit 210. The controller 210 detects that the radio wave sensor 160 has detected the user's human body (human body detection), and that the pyroelectric sensor 170 has detected the user's room entry (room entry detection) due to changes in the amplitude voltage of the voltage waveforms W1 to W3. In addition, it can be determined that the seating sensor 180 has detected the user's seating (sitting detection). The controller 210 starts heating the toilet seat 140 when the measured value of the reflected wave of the radio wave exceeds the threshold and the radio wave sensor 160 detects a human body.

  When the user approaches the toilet room 105 and enters the first detection region DR1 of the radio wave sensor 160, first, the voltage amplitude of the microwave detected by the radio wave sensor 160 increases. At this time, when the voltage amplitude of the microwave exceeds a predetermined threshold value ± Vth (for example, upper limit threshold voltage + Vth and / or lower limit threshold voltage −Vth), control unit 210 determines that radio wave sensor 160 has detected a human body. To do. The threshold value is a parameter used for detecting the human body of the user, and can be expressed by, for example, an upper limit threshold voltage and a lower limit threshold voltage provided with reference to an average level of noise, or a predetermined S / N ratio. Further, when the user enters the first detection region DR1, not only the voltage value but also the frequency of the microwave changes. Therefore, the radio wave sensor 160 can detect the moving speed of the human body by using the Doppler effect and detecting the frequency difference between the microwave transmission wave and the reception wave. Therefore, the threshold value may be expressed by a deceleration rate of the moving speed of the user, or may be expressed by a frequency difference between microwaves transmitted and received.

  The threshold voltage ± Vth in FIG. 3 is determined by a predetermined S / N ratio (Signal-to-Noise ratio). For example, if a predetermined S / N ratio for determining a threshold (hereinafter also referred to as a determination S / N ratio) is 1.5, the threshold voltage is 1.5 times the voltage amplitude of noise (dark noise). It becomes an upper limit and a lower limit of a voltage having an amplitude. Further, when the signal level of the reflected wave exceeds the threshold value a predetermined number of times in a unit (predetermined) time, the control unit 210 may determine that the radio wave sensor 160 has detected a human body. For example, if the determination S / N ratio is 1.5 and the predetermined number of times is 5, the reflected wave having an amplitude 1.5 times or more the noise amplitude is 5 times or more per unit time. When detected, the control unit 210 determines that the radio wave sensor 160 has detected a human body. In this case, the counter 218 counts the peak value and the bottom value of the reflected wave exceeding both or one of the upper limit threshold value and the lower limit threshold value. The unit time and the predetermined number of times may be stored in the storage unit 214 in advance.

  A human body detection time point by the radio wave sensor 160 is set to t0. The human body detection time point t0 can be advanced by reducing the threshold width between the upper limit and the lower limit (that is, by reducing the determination S / N ratio). That is, in order to detect the user's human body quickly, the determination S / N ratio may be reduced. This is because the first detection region DR1 can be expanded by reducing the determination S / N ratio. If the determination S / N ratio is reduced as much as possible, the first detection region DR1 can be made very large, so that the radio wave sensor 160 detects the human body even if the user is far away from the toilet room 105. be able to.

  However, if the first detection region DR1 is greatly expanded, the radio wave sensor 160 increases the frequency of detecting a human body that does not actually enter the toilet room 105. Therefore, the threshold value is set in consideration of the balance between detecting the human body at an early time point and reducing the frequency of non-room estimation.

  As will be described later, the threshold value may be determined in advance, may be automatically determined by calculation by the calculation unit 210, or may be determined manually by a user or a contractor. After the determination, the threshold value is stored in the storage unit 214.

  After entering the first detection area DR1, the user opens the door of the toilet room 105 and enters the toilet room 105. When the user enters the second detection region DR2, the pyroelectric sensor 170 detects the user's human body. When the infrared signal level exceeds a predetermined threshold voltage (change amount with respect to the initial voltage value), the control unit 210 determines that the pyroelectric sensor 170 has detected a human body. The time point when the pyroelectric sensor 170 detects the user's entry is defined as an entry time point t1.

  In the present embodiment, the time from the human body detection time t0 to the entry time t1 is defined as the approach time T1. That is, the approach time T1 is the time from the time (t0) when the measured value of the reflected wave of the microwave exceeds the threshold value to the time (t1) when the user enters the toilet room 105. In other words, the approach time T1 is from the time (t0) when the user approaches the toilet room 105 and enters the first detection region DR1 to the time (t1) when the user enters the second detection region DR2. It's time.

  Thereafter, when the user is seated on the toilet seat 140, the seat sensor 180 detects the user's human body. When the infrared signal level exceeds a predetermined threshold voltage, the control unit 210 may determine that the seating sensor 180 has detected a human body. Thus, the time when the seating sensor 180 detects the user's seating is defined as the seating time t2.

  In the present embodiment, the time from the entry time t1 to the seating time t2 is defined as the seating time T2. That is, the sitting time T2 is the time from the time (t1) when the user enters the toilet room 105 and enters the second detection region DR2 to the time (t2) when the user sits on the toilet seat 140.

  The total time from the time (t0) when the radio wave sensor 160 detects a human body to the time (t2) when the seating sensor 180 detects the seating of the user is defined as Ttotal. By increasing the total time Ttotal, the controller 210 can raise the toilet seat 140 to an appropriate temperature (target temperature) at the time t2 when the user is seated even when the standby temperature of the toilet seat 140 is low. If the standby temperature of the toilet seat 140 can be lowered, the power consumption of the toilet seat device 110 can be reduced. The standby temperature is the temperature of the toilet seat 140 during standby when the toilet device 100 is not used.

  The radio wave sensor 160 can detect the opening / closing of the door of the toilet room 105 in addition to the moving speed of the human body. Even if the door is made of wood having a relatively low relative dielectric constant, the effective reflection area is larger than that of the human body. Therefore, when the reflected wave (voltage amplitude value after detection) received by the radio wave sensor 160 when the human body moves in the vicinity of the door and when the door opens and closes is compared, the time when the door opens and closes is extremely large. Become. Therefore, the radio wave sensor 160 can detect the user entering the room by detecting the rate of reduction of the moving speed of the human body or the opening / closing of the door of the toilet room 105. Therefore, the radio wave sensor 160 may detect entry into the room instead of the pyroelectric sensor 170. Thereby, the pyroelectric sensor 170 can be omitted. Furthermore, the radio wave sensor 160 can detect the user's seating based on a time-series change in the frequency (phase) or voltage value of the microwave. Therefore, the seating sensor 180 may be omitted. That is, human body detection, room entry detection, and seating detection can be performed only by the radio wave sensor 160. In this case, the pyroelectric sensor 170 and the seating sensor 180 are not necessary, and the cost is reduced.

  By the way, the first detection area varies depending on the environment where the toilet apparatus 100 is actually installed. When the first detection region DR1 changes, the actual time (total time Ttotal) from human body detection to seating detection varies. Further, the total time Ttotal also changes depending on the moving speed of the user. For this reason, a certain amount of estimation is required for setting the total time Ttotal or setting the standby temperature of the toilet seat 140.

  The toilet seat device 110 according to the present embodiment appropriately changes the approach time T1 according to the setting of the standby temperature performed by the user, and can raise the toilet seat to an appropriate temperature when the user is seated. I have to. That is, when the user sets the standby temperature low, the threshold (start determination value) for the measurement value of the radio wave sensor 160 is set low so that the first detection region DR1 is widened, and the approach time T1 is set. Ensure that it can be secured for a long time. Thereby, even when the user sets the standby temperature low, the toilet seat temperature can be raised to a comfortable temperature before the user is seated.

  On the other hand, when the user sets the standby temperature high, the threshold value (start determination value) for the measurement value of the radio wave sensor 160 is set high so that the first detection region DR1 is narrowed and the approach time T1 is set. To be shorter. As a result, the frequency of non-entry detection is reduced as much as possible, and power consumption due to useless temperature rising operation can be suppressed.

[Reference table]
First, the reference table for the total time Ttotal or the standby temperature of the toilet seat 140 will be described.

  FIG. 4 is a diagram illustrating an example of the control data table of the reference table. The reference table is a table that is set by the manufacturer before shipment so that the heating function of the toilet seat device 110 can be used immediately after the toilet device 100 is installed, and is stored in the storage unit 214 in advance. For example, in the reference table, the target temperature TEMPtrg is 29 ° C., the standby temperature TEMPstb is 26 ° C., the temperature ΔTEMP (ΔTEMP = TEMPtrg−TEMPstb) that is raised within the total time Ttotal is 3 ° C., the total time Ttotal is 6 seconds, and The determination S / N ratio is set to 1.2. Note that the standby temperature TEMPstb is set higher in the reference table so that the temperature of the toilet seat 140 reaches the target temperature TEMPtrg when the user is seated at the beginning, regardless of which user uses it.

  FIG. 5 is a graph showing the relationship between the total time Ttotal and the temperature of the toilet seat 140. The standby temperature of the toilet seat 140 is TEMPstb, the target temperature that the user feels comfortable when seated is TEMPtrg, and the set temperature of the toilet seat 140 set by the user is TEMPset. The set temperature TEMPset is a desired temperature of the toilet seat 140 during a period in which the user is seated. The temperature of the toilet seat 140 is maintained at the set temperature TEMPset after being heated with high power so as to exceed the target temperature in a short time (for example, 6 seconds). On the other hand, the target temperature TEMPtrg is a temperature of the toilet seat 140 for preventing the user from feeling uncomfortable at the time of sitting, and differs depending on the material and shape of the toilet seat 140 and its thickness. In general, the temperature may be lower than the set temperature TEMPset.

  Until the human body detection time t0, the control unit 210 maintains the temperature of the toilet seat 140 at the standby temperature TEMPstb. Here, it is assumed that the standby temperature TEMPstb is 26 ° C. At the human body detection time t0, the controller 210 starts heating the temperature of the toilet seat 140 from the standby temperature TEMPstb by the heater 142. Then, at the seating time t2, the temperature of the toilet seat 140 needs to reach the target temperature TEMPtrg. In the example of FIG. 5, the target temperature TEMPtrg is reached 6 seconds after the start of heating. The inclination of the temperature change T140 of the toilet seat 140 shown in FIG. 5 is determined by the heat transfer characteristics from the heater 142 to the toilet seat 140, the voltage applied to the heater 142, and the energization time.

  For example, when the user changes the standby temperature TEMPstb from 26 ° C. to 23 ° C., it naturally takes a long time to start the heating of the toilet seat 140 until the target temperature TEMPtrg is reached. In the example of FIG. 5, when the standby temperature TEMPstb is 23 ° C., it can be seen that the target temperature TEMPtrg has been reached 9 seconds after the start of heating. Therefore, in the present embodiment, the threshold value (start determination value) for the measurement value of the radio wave sensor 160 is ensured so as to ensure the necessary heating time, that is, the necessary total time Ttotal, according to the value of the standby temperature TEMPstb set by the user. ) Is changed. That is, by changing the threshold value (start determination value) for the measurement value of the radio wave sensor 160, the timing for starting the temperature rise of the toilet seat 140 can be shifted back and forth. An approach time T1 corresponding to the standby temperature TEMPstb is secured, so that an appropriate total time Ttotal can be secured.

  FIG. 6 is a diagram illustrating an example of the adaptation table TB20 for realizing the change of the total time Ttotal according to the standby temperature TEMPstb. As shown in FIG. 6, in the adaptation table TB20, for each standby temperature TEMPstb, the start determination value of the measurement value of the radio wave sensor 160 that determines the timing for starting the heating and heating of the toilet seat 140 is determined. For example, when the standby temperature TEMPstb set by the user is 26 ° C., the start determination value for starting the heating is set to S / N ratio = 1.4, whereby 1 second (approach time T1) +5 seconds (Sitting time T2) = Total time Ttotal of 6 seconds can be secured. Similarly, when the standby temperature TEMPstb set by the user is 23 ° C., the start determination value for starting the heating is set to S / N ratio = 1.15, thereby 4 seconds (approach time T1) +5 A total time Ttotal of seconds (seating time T2) = 9 seconds can be ensured.

  The adaptation table TB20 illustrated in FIG. 6 is stored in the storage unit 214 of the control unit 210, for example. When the adaptation table TB20 is stored, only the standby temperature TEMPstb and the S / N ratio value of the start determination value corresponding to the standby temperature TEMPstb may be held as items, and in addition to this, the approach time T1, the sitting time T2, and the total time Ttotal may also be held as items. Further, the user can change the setting of the standby temperature TEMPstb by an arbitrary method. In the present embodiment, for example, the user can manually change the setting of the standby temperature TEMPstb by operating the function setting unit 132.

  FIG. 7 is a flowchart illustrating an example of the contents of the immediate warm control process executed by the control unit 210 according to the present embodiment. This immediate warming control process is a process that is started when the toilet seat device 110 is powered on, but is also a process that is restarted when the user changes the standby temperature TEMPstb. In this immediate warming control process, the controller 210 controls the temperature of the toilet seat 140 using the adaptation table TB20 as follows.

  First, the control unit 210 acquires an S / N ratio start determination value corresponding to the standby temperature TEMPstb set by the user from the adaptation table TB20 (step S100). For example, when the user sets the standby temperature TEMPstb to 23 ° C., the control unit 210 acquires a start determination value of S / N ratio = 1.15 from the adaptation table TB20.

  Next, the control unit 210 monitors the measurement value of the radio wave sensor 160 and determines whether or not the S / N ratio of this measurement value is equal to or greater than the start determination value of 1.15 (step S110). When it is determined that the measurement value of the radio wave sensor 160 is not equal to or greater than the start determination value (step S110: NO), this step S110 is repeatedly executed, and the measurement value of the radio wave sensor 160 is continuously monitored. .

  On the other hand, when it is determined that the S / N ratio of the measurement value of the radio wave sensor 160 is 1.15 or more (step S110: YES), the control unit 210 starts to raise the temperature of the toilet seat 140 (step S120). ). Then, the control unit 210 determines whether or not entry of the user into the toilet room 105 by the pyroelectric sensor 170 is detected (step S130). When this entry is not detected (step S130: NO), the controller 210 determines whether or not a predetermined time has elapsed since the start of temperature increase (step S140). This predetermined time is, for example, 6 seconds or 10 seconds.

  If the predetermined time has not elapsed since the start of temperature increase (step S140: NO), the control unit 210 returns to step S130 and repeats the determination of whether or not the user has entered the toilet room 105. . On the other hand, when the predetermined time has elapsed since the start of the temperature increase (step S140: YES), the temperature increase of the toilet seat 140 is stopped (step S150), and the process returns to the above-described step S110. Thus, the control unit 210 estimates that the user does not enter the toilet room 105 when the user does not enter the toilet room 105 even after a predetermined time has elapsed. As described above, the determination that the control unit 210 determines that the user does not enter the room although the toilet seat apparatus 110 starts the temperature raising operation of the toilet seat part 140 is referred to as “non-room entry estimation”.

  On the other hand, when it is detected in step S130 that the user has entered the toilet room 105 (step S130: YES), the control unit 210 starts temperature control based on the set temperature TEMPset (step S160). Here, assuming that the set temperature is 35 ° C., temperature control is performed so that the temperature of the toilet seat 140 is 35 ° C.

  Next, the controller 210 determines whether or not the pyroelectric sensor 170 detects the user leaving the toilet room 105 (step S170). When the user's leaving is not detected (step S170: NO), the temperature control based on the set temperature TEMPset is continued.

  On the other hand, when the pyroelectric sensor 170 detects the user leaving the toilet room 105 (step S170: YES), the control unit 210 starts control based on the standby temperature TEMPstb (step S180), and Return to step S110.

  As described above, according to the toilet seat apparatus 110 according to the present embodiment, the approach time T1 is determined based on the standby temperature TEMPstb set by the user, and the start determination value is determined based on the determined approach time T1. Therefore, regardless of the value of the standby temperature TEMPstb set by the user, the toilet seat at the user's seating time can be raised to an appropriate temperature.

  That is, if the user sets the standby temperature TEMPstb to a low value only by starting the temperature increase of the toilet seat 140 with a fixed start determination value, the temperature increase performance cannot catch up and the toilet seat temperature is raised to a comfortable temperature at the time of sitting. In this embodiment, the approach time T1 is determined based on the standby temperature TEMPstb, and the start determination value that is the detection result of the radio wave sensor 160 based on the determined approach time T1. Therefore, it is possible to balance the relationship between the frequency of non-entry estimation and the toilet seat temperature at the time of sitting.

  Also, since the user can manually change the setting of the standby temperature TEMPstb, the standby temperature TEMPstb can be set according to the user's preference and demand. For this reason, for example, the standby temperature TEMPstb can be set flexibly in accordance with the preference of temperature setting by young and old men and women, changes in seasons, and the like. Even if the standby temperature TEMPstb is changed in this way, the start determination value is determined based on the approach time T1 determined by setting the standby temperature TEMPstb. Therefore, while reducing the power consumption in the toilet seat 140, the user's It becomes possible to reliably raise the temperature of the toilet seat 140 at the time of sitting to a comfortable temperature.

  In the present embodiment, the start determination value corresponding to each standby temperature TEMPstb is fixedly determined in advance in the adaptation table TB20 of FIG. 6, but this start determination value is based on the actual measurement result. May be changed dynamically. For example, when the set standby temperature TEMPstb is 23 ° C., it can be seen that the approach time T1 needs 4 seconds. For this reason, the control unit 210 specifies the user entry time point t1 based on waveforms of actual measurement values of the radio wave sensor 160 and the pyroelectric sensor 170, and the radio wave sensor 160 at a time point 4 seconds before the entry time point t1. The S / N ratio of the measured values may be acquired, and this S / N ratio may be used as the start determination value. The S / N ratio, which is the start determination value determined in this way, can be stored and held in the adaptation table TB20. By doing in this way, the S / N ratio of the start determination value can be determined with high accuracy.

(Second Embodiment)
FIG. 8 is a diagram illustrating an example of the configuration of the adaptation table TB40 according to the second embodiment. The adaptation table TB40 is also stored in the storage unit 214 of the control unit 210. The adaptation table TB40 of FIG. 8 is different from the first embodiment described above in that the daytime start determination value and the night start determination value are set separately.

  That is, in the daytime table, the relationship between the start determination value, the approach time T1, the seating time T2, and the total time Ttotal corresponding to the standby temperature TEMPstb is the same as the adaptation table TB20 of the first embodiment described above. However, the relationship between the start determination value, the approach time T1, the seating time T2, and the total time Ttotal corresponding to the standby temperature TEMPstb in the night table is different from the adaptation table TB20 of the first embodiment described above. .

  In the night table, the start determination value is set smaller than that in the daytime table so that the first detection region DR1 is set wider. This is because at night, traffic of people outside the toilet room 105 decreases, and when a person enters the vicinity of the toilet room 105, the toilet is often the purpose. For this reason, even if the approach time T1 is lengthened and the temperature rise time is sufficiently secured, the possibility of non-entry estimation is kept low.

  In the example of FIG. 8, for example, when the standby temperature TEMPstb is 26 ° C., the daytime start determination value is S / N ratio = 1.4, whereas the nighttime start determination value S / N ratio = 1. .3. For this reason, the temperature rise of the toilet seat 140 is started at a timing earlier in the night than in the daytime, and a long approach time T1 is ensured.

  In the adaptation table TB40 of FIG. 8, the lower limit of the S / N ratio of the start determination value is set to 1.1. This is because the measurement accuracy of the radio wave sensor 160 is limited, and if the S / N ratio of the start determination value is smaller than a predetermined value, the measurement waveform of the radio wave sensor 160 may not be properly recognized. For this reason, by setting a lower limit to the S / N ratio of the start determination value, it is possible to set the S / N ratio of the start determination value within the range of measurement values that can be actually measured by the radio wave sensor 160. As a result, the setting accuracy of the S / N ratio of the start determination value can be increased.

  Further, when the adaptation table TB40 is stored in the storage unit 214, only the standby temperature TEMPstb for daytime and nighttime and the S / N ratio value of the start determination value corresponding thereto are stored as items. In addition, the approach time T1, the seating time T2, and the total time Ttotal may be held as items in addition to this.

  FIG. 9 is a flowchart illustrating an example of the contents of the adaptive table switching process executed by the control unit 210 according to the present embodiment. This adaptive table switching process is a process that is regularly executed at a predetermined cycle (for example, once every 10 minutes). Also, when step S100 in the immediate warming control process of FIG. 7 executed when the toilet seat device is powered on or when the user changes the standby temperature TEMPstb is executed as the process of step S100. It is also processed. In the adaptive table switching process, the control unit 210 switches the start determination value using the adaptive table TB40 as follows.

  First, the control unit 210 acquires the current time and determines whether or not the current time is between 8 am and 10 pm (step S200). If the current time is between 8 am and 10 pm (step S200: YES), the control unit 210 acquires a daytime start determination value corresponding to the set standby temperature TEMPstb ( Step S210). For example, when the standby temperature TEMPstb is 26 ° C., S / N ratio = 1.4 is acquired as the start determination value.

  On the other hand, if the current time is not between 8:00 am and 10:00 pm (step S200: NO), the controller 210 obtains a night start determination value corresponding to the set standby temperature TEMPstb. To do. For example, when the standby temperature TEMPstb is 26 ° C., S / N ratio = 1.3 is acquired as the start determination value.

  Based on the S / N ratio of the start determination value acquired in step S210 or step S220, the control unit 210 executes the immediate warming control process of FIG. For this reason, even in the daytime and at night, even when the standby temperature TEMPstb is the same, immediate warming control can be performed based on different start determination values. That is, the temperature of the toilet seat 140 can be increased based on a different approach time T1, that is, a total time Ttotal.

  As described above, according to the toilet seat apparatus 110 according to the present embodiment, different approach times T1 can be set according to the time zone of the day, and further consumption corresponding to the use environment can be achieved. Electric power can be reduced.

  In the present embodiment, a plurality of approach times T1 (that is, S / N ratios of start determination values) are set for one standby temperature TEMPstb, and differ according to the time zone of the day. Although the approach time T1 can be selected, one approach time T1 may be selected from a plurality of approach times T1 depending on the presence or absence of a child or an elderly person, the number of persons, and the like.

(Third embodiment)
FIG. 10 is a conceptual diagram showing the structure of the toilet room 105 provided with the toilet apparatus 100 according to the present embodiment and the direction in which the user enters the toilet room 105.

  Generally, the door of the toilet room 105 is provided on either the front surface (a front surface of the toilet device 110) or the side surface (a surface on the side of the toilet device 110). When the door 107 is provided in front of the toilet room 105, the user's approach direction is from the front of the toilet room 105 (substantially perpendicular to the front) (environmental information (I)) and the toilet. It can be divided into a case (environment information (II)) approaching from the side of the room 105 (a direction substantially parallel to the front). As shown in FIG. 1B, as long as the first detection region DR1 extends symmetrically with respect to the toilet device 110, the threshold value is set when the user enters from the right side of the toilet room 105 and on the left side. It may be the same when entering from.

  When the door 107 is provided on the side surface of the toilet room 105, when the user approaches from the front of the toilet booth 105 in a direction substantially parallel to the side surface of the toilet room 105 (environment information (III)) When approaching from the side of the toilet room 105 (substantially perpendicular to the side surface) (environmental information (IV)), approaching from the rear of the toilet room 105 in a direction substantially parallel to the side surface of the toilet room 105 Case (environmental information (V)). Since the first detection region DR1 extends symmetrically with respect to the toilet device 110, the first detection region DR1 is approached from the front of the toilet room 105 (environment information (III)) and the approach is performed from the rear of the toilet room 105 ( In the environmental information (V)), the S / N ratio of the start determination value is preferably different. In FIG. 10, a broken arrow indicates the door opening / closing direction.

  FIG. 11 is a diagram illustrating an example of a partial configuration of the adaptation table TB60 according to the present embodiment. The adaptation table TB60 is also stored in the storage unit 214 of the control unit 210. In the adaptation table TB60 of FIG. 11, one approach time T1 is selected from a plurality of approach times T1 according to the housing situation.

  That is, a table that defines the correspondence relationship between the standby temperature TEMPstb and the S / N ratio of the start determination value when the housing status is environmental information (IV), and the standby when the housing status is environmental information (V) A table that defines the correspondence between the temperature TEMPstb and the S / N ratio of the determination value is provided in the adaptation table TB60 of FIG.

  For example, when the set standby temperature TEMPstb is 26 ° C. and the housing status is the environmental information (IV), the start determination value is S / N ratio = 1.25, but the housing status is the environmental information (V ), The start determination value is S / N ratio = 1.1. This is because when approaching from the rear of the toilet room 105 in a direction substantially parallel to the side surface of the toilet room 105 (environmental information (V)), the side of the toilet room 105 (substantially perpendicular to the side surface). This is because the radio wave sensor 160 has a characteristic that it is harder to detect than when approaching from (environmental information (IV)). That is, in order to increase the sensitivity when approaching from the rear of the toilet room 105 in a direction substantially parallel to the side surface of the toilet room 105 (environment information (V)), the S / N of the start determination value of the environment information (IV) The S / N ratio of the start determination value of the environment information (V) is made smaller than the ratio.

  Also in the adaptation table TB60 of FIG. 11, since the measurement accuracy of the radio wave sensor 160 is limited, the lower limit of the S / N ratio of the start determination value is set to 1.1. In FIG. 11, a lower limit is also set for the standby temperature TEMPstb that can be set by the user. For example, when the housing status is environmental information (IV), the lower limit value of the standby temperature TEMPstb is 23 ° C., and the user cannot set the standby temperature TEMPstb to 22 ° C. If the user attempts to set the standby temperature TEMPstb to 22 ° C., the control unit 210 forcibly corrects and sets the temperature set by the user to 23 ° C. Similarly, when the housing status is environment information (V), the lower limit value of the standby temperature TEMPstb is 26 ° C., and the user cannot set the standby temperature TEMPstb below 26 ° C. If the user attempts to set the standby temperature TEMPstb to less than 26 ° C., the control unit 210 forcibly corrects and sets the temperature set by the user to 26 ° C. In this way, by forcibly correcting the standby temperature TEMPstb upward, the temperature rise is not in time, and the temperature of the toilet seat is low when seated, so that the user does not feel uncomfortable.

  FIG. 11 illustrates an adaptation table TB60 that includes a table of environment information (IV) and a table of environment information (V), but the adaptation that is actually stored in the storage unit 214 of the control unit 210. The table TB60 also includes tables for other environment information (I) to (iii). Further, when the adaptation table TB60 is stored in the storage unit 214, only the standby temperature TEMPstb and the S / N ratio value of the start determination value corresponding thereto may be held as items. In addition, the approach time T1, the seating time T2, and the total time Ttotal may also be held as items.

  FIG. 12 is a diagram illustrating an example of a flowchart for explaining the contents of the adaptive table switching process executed by the control unit 210 according to the present embodiment. This adaptive table switching process is a process executed as step S100 in the immediate warming control process of FIG. That is, as shown in FIG. 12, as a process in step S100, the control unit 210 determines whether or not the housing status is set (step S300). That is, the user sets and inputs in advance by operating the function setting unit 132 of the remote control device 130 as to which of the environmental information (I) to (V) the installation status of the toilet seat device 110 corresponds to.

  When it is determined that the housing status is not set (step S300: NO), the control unit 210 acquires the S / N ratio of the start determination value from the reference table shown in FIG. 4 (step S310). . In the example of FIG. 4, the control unit 210 acquires S / N ratio = 1.2 as the start determination value. That is, when this reference table is used, the S / N ratio of the start determination value is fixed to a predetermined value regardless of the value of the standby temperature TEMPstb.

  On the other hand, if it is determined in step S300 that the housing status has been set (step S300: YES), the S / N ratio of the start determination value is acquired from the adaptation table TB60 shown in FIG. 11 (step S320). ). Specifically, the S / N ratio of the start determination value corresponding to the value of the standby temperature TEMPstb is acquired using a table corresponding to the set housing situation. For example, when the housing state set by the user is the environmental information (IV) and the standby temperature TEMPstb set by the user is 26 ° C., the control unit 210 uses the S / N ratio = 1 as the start determination value. .25 is obtained.

  After executing step S310 or step S320 as step S100 in FIG. 7, the control unit 210 proceeds to step S110 in FIG. 7 and continues the immediate warming control process.

  As described above, according to the toilet seat device 110 according to the present embodiment, a plurality of different start determination values are prepared even at the same standby temperature TEMPstb, and the plurality of start determination values are determined based on the housing situation set by the user. Since one of them is selected and used, a more appropriate approach time T1 can be set according to the housing situation where the toilet seat device 110 is installed.

(Fourth embodiment)
FIG. 13 is a flowchart illustrating an example of an adaptive table correction process based on non-room entry estimation executed by the toilet seat apparatus 110 according to the present embodiment. This adaptive table correction process is a process executed by the control unit 210 of the toilet seat apparatus 110 at a predetermined cycle. For example, it may be executed periodically at a rate of once per hour, or the number of times the measured value of the radio wave sensor 160 is determined to be equal to or greater than the start determination value is counted, and this count is 10 It may be executed every time.

  In this embodiment, by performing the adaptive table correction process based on this non-entry estimation, when there is a non-entry estimation five times or more out of ten times, the S / N ratio between the standby temperature TEMPstb and the start determination value It is determined that the relationship is not accurately associated, and correction is performed.

  More specifically, as shown in FIG. 13, first, the control unit 210 determines that the number of times that the non-occupancy estimation is estimated among the 10 times that the measured value of the radio wave sensor 160 is equal to or greater than the start determination value. It is determined whether there are five or more times (step S400). In the present embodiment, only the most recent 10 times when the measurement value of the radio wave sensor 160 is equal to or greater than the start determination value is extracted, and the number of times of non-entry estimation is used as a determination criterion. That is, the control unit 210 according to the present embodiment counts the number of times that the measurement value of the radio wave sensor 160 is equal to or greater than the start determination value, and also counts the number of times that the non-entry estimation is included.

  When it is determined that the number of non-room estimations is 5 or more out of 10 times that the measurement value of the radio wave sensor 160 is equal to or greater than the start determination value (step S400: YES), The standby temperature is corrected (step S410). For example, as described in the first embodiment, when the S / N ratio of the start determination value is determined using the adaptation table TB20 of FIG. 6, the standby temperature of the adaptation table TB20 is corrected. That is, correction is performed so that the approach time T1 set by the adaptation table TB20 is shortened based on the determination that the frequency of non-room estimation is high and the accuracy is low.

  FIG. 14 is a diagram illustrating an example of the adaptation table TB20 after this correction is performed on the adaptation table TB20 of FIG. As can be seen by comparing FIG. 6 and FIG. 14, the temperature of the standby temperature TEMPstb is decreased by 1 ° C. in order to reduce the frequency of non-room estimation. For example, the standby temperature TEMPstb corresponding to the S / N ratio = 1.4 of the start determination value is changed from 26 ° C. to 25 ° C. In other words, when the standby temperature TEMPstb is 26 ° C., the S / N ratio of the start determination value is changed from 1.4 to 1.5. By this change, the timing at which the temperature rise of the toilet seat 140 is started can be delayed, and as a result, the frequency of non-room estimation can be reduced. The same correction can be performed for the adaptation table TB40 according to the second embodiment and the adaptation table TB60 according to the third embodiment.

  On the other hand, when it is determined in step S400 described above that the number of non-room estimations is not more than 5 out of 10 times counted that the measurement value of the radio wave sensor 160 is equal to or greater than the start determination value (step S400). : NO), the adaptive table standby temperature is not corrected.

  As described above, according to the toilet seat device 110 according to the present embodiment, the number of times of non-entry estimation is counted despite the temperature rise of the toilet seat 140 being started, and based on the number of times of non-entry estimation. Since the standby temperature of the adaptation table is corrected, the correspondence between the standby temperature and the start determination value can be made more appropriate, and the power consumption can be further reduced. . For example, when it is estimated that a user enters a room based on a certain start determination value, and the non-room estimation that the user does not enter occurs at a predetermined frequency even though the temperature of the toilet seat 140 is started. Increases the start determination value, delays the timing to start raising the temperature of the toilet seat 140, and shortens the approach time T1. As a result, the approach time in the adaptation table can be initially set longer, and the balance between both can be balanced by appropriately correcting the correspondence between the frequency of non-entry estimation and the setting of the standby temperature. Appropriate settings can be made in consideration, and the user's feeling of use can be improved.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation is possible. For example, in each of the above-described embodiments, the example in which the S / N ratio of the measurement value of the radio wave sensor 160 is used as the start determination value that is a threshold value for determining the timing at which the temperature rise of the toilet seat 140 is started has been described. This start determination value is not limited to the measured value S / N ratio of the radio wave sensor 160. For example, the start determination value may be determined by using the deceleration of the measurement value of the radio wave sensor 160, or the S / N ratio of the measurement value of the radio wave sensor 160 and the deceleration may be used in combination. A start determination value may be determined.

DESCRIPTION OF SYMBOLS 100 ... Toilet apparatus 105 ... Toilet room 110 ... Toilet seat apparatus 120 ... Toilet bowl 130 ... Remote operation apparatus (remote control)
140 ... toilet seat 142 ... heater 144 ... temperature detection unit 150 ... sensor unit 160 ... radio wave sensor 170 ... pyroelectric sensor 180 ... seating sensor 200 ... cleaning unit 210 ... Control unit 212 ... Calculation processing unit 214 ... Storage unit 216 ... Timer 218 ... Counter

Claims (8)

Toilet seat installed in the toilet room,
A heating part for heating the toilet seat part;
A sensor unit that transmits radio waves and detects the human body of the user outside the toilet room by the intensity of reflected waves of the radio waves ;
A control unit for controlling the heating unit and the sensor unit,
The controller is
Whether or not the intensity of the reflected wave in the sensor unit that detects the user's human body outside the toilet room is equal to or higher than a start determination value when the heating unit starts to raise the temperature of the toilet seat. As well as making decisions
The time from when the intensity of the reflected wave at the sensor unit becomes equal to or greater than the start determination value until the user enters the toilet room is referred to as approach time, and when the user is seated on the toilet seat unit, Ensuring the approach time according to the standby temperature by determining the start determination value so that the temperature reaches the target temperature from the standby temperature ;
A toilet seat device.   The toilet seat device according to claim 1, further comprising standby temperature setting change means for a user to manually change the setting of the standby temperature. The control unit stores the approach time according to the standby temperature based on the actual intensity of the reflected wave detected by the sensor unit, and the intensity of the reflected wave corresponding to the stored approach time is The toilet seat device according to claim 1, wherein a start determination value is used.   4. The toilet seat device according to claim 3, wherein a plurality of the approach times are set in advance with respect to the standby temperature, and are selected from the plurality of approach times.   The toilet seat device according to claim 4, wherein the plurality of approach times are selected according to a housing situation.   The start determination value has a minimum start value which is a lower limit of the value. When the start determination value determined based on the approach time is lower than the minimum start value, the start determination value is the minimum start value. The toilet seat device according to claim 4, wherein the toilet seat device is set to a value.   The toilet seat device according to claim 6, wherein the standby temperature is corrected and set up based on an approach time determined according to the minimum start value of the start determination value.   After the temperature of the toilet seat is started by the heating unit, the standby temperature is corrected using an entry result indicating whether the user actually entered the room or whether the user actually entered the room. The toilet seat device according to claim 4.

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