CN109555200B - Spot cleaning device - Google Patents

Abstract

The present invention provides a local cleaning device capable of increasing the flow rate of cleaning water in a local cleaning device of instantaneous supply of hot water. The control device 27 of the local cleaning apparatus 1 includes a target temperature acquisition unit 27c, an energization amount calculation unit 27d, an energization control unit 27e, and a correction unit 27h. The target temperature acquisition unit 27c acquires the target temperature of the washing water sprayed from the nozzle device 25 . The energization amount calculation unit 27d calculates the energization amount to be energized to the heater 23a that heats the washing water so that the discharge temperature of the washing water sprayed from the nozzle device 25 becomes the target temperature. The energization control unit 27e controls to energize the heater 23a based on the energization amount calculated by the energization amount calculation unit 27d when the washing water flows. When the value of the heater current flowing through the heater 23a is equal to or greater than the specified current value, the correction unit 27h performs correction to reduce the amount of energization calculated by the amount of energization calculation unit 27d.

Description

Spot cleaning device

technical field

The present invention relates to a local cleaning device.

Background technique

As one form of a local cleaning apparatus, apparatuses shown in Patent Document 1 and Patent Document 2 are known. The method of heating the washing water in the local cleaning apparatuses of Patent Document 1 and Patent Document 2 is a so-called instantaneous hot water supply type. The instantaneous hot water supply type is a method of heating the washing water when the washing water for cleaning the local area is sprayed from the nozzle, and raising the temperature of the cleaning water from the temperature supplied to the local cleaning device to the target temperature for cleaning the local area .

Patent Literature

Patent Document 1: Japanese Patent Laid-Open No. 2011-53989

Patent Document 2: Japanese Patent Laid-Open No. 2013-104266

SUMMARY OF THE INVENTION

When the method of heating the washing water is the instant hot water supply type, compared with the hot water storage type in which the washing water is stored and heated without spraying it, the former provides a larger amount of heat to the washing water. The rated power of the heater becomes larger. However, in order for a domestic Molded Case Circuit Breaker to not work, it is necessary to limit the power rating of the heater. For this reason, in the instantaneous hot water supply type, the flow rate of the washing water is limited in comparison with the hot water storage type. On the other hand, in the instantaneous hot water supply type, it is desired to increase the flow rate of the washing water.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to realize an increase in the flow rate of washing water in a local washing apparatus of an instantaneous hot water supply type.

In order to solve the above-mentioned problems, a local cleaning device according to claim 1 is a local cleaning device that cleans a part of a human body by spraying cleaning water introduced from a water supply source, and includes a heater, a current sensor, a nozzle device, a spray Out of the temperature sensor and the control device, the heater is energized to heat the cleaning water introduced from the water supply source; the current sensor detects the heater current value, which is the value of the current flowing through the heater The nozzle device sprays the cleaning water heated by the heater; the spray temperature sensor detects the spray temperature, and the spray temperature is the temperature of the cleaning water sprayed from the nozzle device; the control device at least controls the nozzle device. The control device includes a target temperature acquisition unit, an energization amount calculation unit, an energization control unit, and a correction unit, the target temperature acquisition unit acquires a target temperature of the washing water sprayed from the nozzle device; The discharge temperature detected by the discharge temperature sensor becomes the target temperature obtained by the target temperature acquisition unit to calculate the energization amount for energizing the heater; the energization control unit controls the flow of the washing water according to the energization amount. The energization amount calculated by the calculation unit energizes the heater; when the heater current value detected by the current sensor is equal to or greater than a predetermined current value, the correction unit performs correction to reduce the energization amount calculated by the energization amount calculation unit.

As a result, when the heater current value detected by the current sensor is equal to or greater than the specified current value, correction is performed so that the amount of energization to be energized to the heater calculated by the energization amount calculation unit becomes smaller, so that the heater of the heater flows through the heater. The current value becomes smaller. Therefore, even in the case where the heater current value becomes relatively large, since the heater current value is suppressed, it is possible to suppress the operation of the domestic molded box circuit breaker. Therefore, the rated power of the heater can be set relatively large, and the energy that can be given to the washing water per unit time can be relatively increased, so that the flow rate of the washing water can be increased in the instantaneous hot water supply type local washing device.

Description of drawings

FIG. 1 is a schematic diagram showing a local cleaning apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram of the local cleaning device shown in FIG. 1 .

FIG. 3 is a flow chart executed by the control device shown in FIG. 2 .

FIG. 4 is a flowchart of energization amount correction control as a subroutine of the flowchart shown in FIG. 3 .

FIG. 5 is a graph showing the power value of the heater shown in FIG. 1 .

6 is a flowchart of the energization amount correction control in the local cleaning device according to the second embodiment of the present invention.

Detailed ways

(first embodiment)

Next, the local cleaning device according to the first embodiment of the present invention will be described. The local washing device 1 is a device that washes a part of the human body by spraying the washing water introduced from the water supply source W. As shown in FIG. The water supply source W is, for example, a tap water pipe. As shown in FIG. 1 , the local cleaning apparatus 1 includes an operation unit 10 , a cleaning function unit 20 , a toilet seat (not shown) and a toilet cover (not shown) rotatably supported by the cleaning function unit 20 .

The operation unit 10 performs remote operation (eg, remote control) of the local cleaning apparatus 1 . The operation unit 10 includes a plurality of switches for operating the local cleaning device 1 . The operation part 10 wirelessly transmits a designated control signal to the cleaning function part 20 by the operation of the switch by the user. The switch includes a first switch 11, a second switch 12, and a warning lamp 13 that flashes when an abnormality occurs, which will be described later.

The first switch 11 is a switch for setting a target flow rate that is a target flow rate of the washing water sprayed by the nozzle device 25 (described later). By operating the first switch 11, one target flow rate is selected from a plurality of preset target flow rates. The target flow rate selected by the first switch 11 is sent as a control signal to a control device (described later). In the first embodiment, the maximum target flow rate among the plurality of target flow rates is set to 570 mL in consideration of the water supply temperature (5° C.), the target temperature (40° C.), and the rated power (1500 W) of the heater 23 a, which will be described later. /minute.

The second switch 12 is a switch for setting a target temperature which is a target temperature of the washing water sprayed by the nozzle device 25 . By operating the second switch 12, one target temperature is selected from a plurality of preset target temperatures. The target temperature selected by the second switch 12 is sent to the control device as a control signal. In the first embodiment, the maximum target temperature among the plurality of target temperatures is set to 40°C.

The washing function part 20 introduces washing water from the water supply source W and ejects the washing water. The washing function part 20 sprays water (tap water) from the water supply source W (tap water pipe) to a part of the human body as washing water. The cleaning function unit 20 includes: a first connection water path L1 , a water supply device 21 , a cleaning water presence/absence detection device 22 , a heating device 23 , a pump 24 , a nozzle device 25 , a current sensor 26 , and a control for overall control of the cleaning function unit 20 device 27.

The first connection water passage L1 connects the water supply device 21 and the nozzle device 25, and constitutes a water passage through which the washing water flows. The first connection water passage L1 is, for example, a tubular hose. The washing water presence/absence detection device 22 , the heating device 23 , and the pump 24 are arranged in the first connection water passage L1 from the water supply device 21 toward the nozzle device 25 .

The water supply device 21 guides the washing water from the water supply source W to the washing function part 20 . Specifically, the water supply device 21 leads the washing water from the water supply source W to the first connection water passage L1 via the branch faucet Wa and the water supply hose H connecting the branch faucet Wa and the water supply device 21 . The water supply device 21 is formed to include a water stop solenoid valve 21a.

The water stop solenoid valve 21a is a solenoid valve that allows the flow of washing water in an open state and restricts the flow of washing water in a closed state. In addition, the water stop solenoid valve 21a is a normally closed type solenoid valve which becomes an open state when energized, and is a normally closed state when it is not energized.

The washing water presence/absence detection device 22 detects the presence or absence of washing water. The washing water presence/absence detection device 22 is provided with a water supply temperature sensor 22a and a flow switch 22b.

The feed water temperature sensor 22a detects the temperature of the washing water flowing through the washing water presence/absence detection device 22 . Specifically, the water supply temperature sensor 22a detects the water supply temperature, which is the temperature of the washing water introduced from the water supply source W. The temperature of the washing water detected by the feed water temperature sensor 22a is sent to the control device 27 as a detection signal.

The flow switch 22b detects the presence or absence of washing water. The flow switch 22b is, for example, an impeller-type flow switch 22b. When the flow rate of the washing water flowing through the washing water presence/absence detection device 22 is equal to or greater than a predetermined flow rate, the flow switch 22b detects that there is washing water. The predetermined flow rate is set to a flow rate at which the heating device 23 does not cause idling by the heater 23a, which will be described later. The presence or absence of washing water detected by the flow switch 22b is sent to the control device 27 as a detection signal.

When the washing water is sprayed from the nozzle device 25, the heating device 23 heats the washing water so that the temperature of the washing water is changed from the water supply temperature to the target temperature. That is, in the first embodiment, the heating method of the washing water is the instantaneous hot water supply method. When the washing water flows through the first connection water passage L1, the heating device 23 heats the washing water. The heating device 23 includes a heater 23a and a discharge temperature sensor 23b.

The heater 23a heats the washing water introduced from the water supply source W by being energized. The rated voltage of the system power supply (not shown) connected to the local cleaning apparatus 1 is applied to the heater 23a. The rated voltage of the system power supply is 100V.

The heater 23a is a ceramic heater in the first embodiment. The rated power of the heater 23a is set to 1300W or more. In the first embodiment, the rated power of the heater 23a is 1500W. That is, the resistance value of the heater 23a is set to 6.67Ω.

When the washing water flows through the first connection water path L1, the washing water directly contacts the outer surface of the heater 23a. The heater 23a heats the washing water in accordance with a control signal from the control device 27 (details will be described later).

The discharge temperature sensor 23b detects the discharge temperature, which is the temperature of the washing water discharged from the nozzle device 25 . Specifically, the discharge temperature sensor 23b detects the temperature of the washing water heated by the heater 23a. The temperature of the washing water detected by the ejection temperature sensor 23b is sent to the control device 27 as a detection signal.

The pump 24 pulsates the wash water by changing the volume of the water passage. The pump 24 is a positive displacement reciprocating pump (eg, a diaphragm pump) including a piston (not shown) that reciprocates. By pulsating the washing water sprayed from the nozzle device 25 by the pump 24, even when the flow rate of the washing water is relatively small, compared with the case where the washing water is not pulsated, the former can enhance the local treatment of the human body. Cleaning water potential.

The nozzle device 25 sprays the washing water heated by the heater 23a. The nozzle device 25 includes a flow path switching valve 25a, a second connection water path L2, a third connection water path L3, a drainage path Ld, a buttock nozzle 25b, and a female nozzle 25c.

Each of the connection water passages L2 and L3 and the drainage passage Ld is a water passage through which washing water flows, and is, for example, a tubular hose. The second connection water passage L2 connects the flow passage switching valve 25a and the buttocks nozzle 25b. The third connection water path L3 connects the flow path switching valve 25a and the female nozzle 25c. The drainage passage Ld discharges the washing water from the flow passage switching valve 25a to, for example, a bedpan portion (not shown) of a toilet on which the partial washing apparatus 1 is attached.

The flow path switching valve 25a is driven by the drive unit M (eg, a stepping motor) in accordance with a control signal from the control device 27, and is selectively switched to one of the second connection water path L2, the third connection water path L3, and the discharge path Ld, and is The washing water from the first connection water passage L1 is led out. The flow path switching valve 25a is, for example, a four-way valve.

In addition, the channel switching valve 25a is driven by the drive unit M in accordance with a control signal from the control device 27, and can also function as a flow control valve that can adjust the flow rate of washing water by changing the channel cross-sectional area of the water channel.

The buttocks nozzle 25b sprays the washing water supplied from the second connection water passage L2, and performs buttocks washing. The female part nozzle 25c sprays the washing water supplied from the 3rd connection water path L3, and performs a female part cleaning.

The current sensor 26 detects the heater current value which is the value of the current flowing through the heater 23a. The current sensor 26 is electrically arranged in series on the power line Lp that connects the control device 27 and the heater 23a and supplies electric power to the heater 23a. The heater current value detected by the current sensor 26 is sent to the control device 27 as a detection signal.

The control device 27 controls at least the nozzle device 25 . As shown in FIG. 2, the control device 27 includes a target flow rate acquisition unit 27a, a flow rate control unit 27b, a target temperature acquisition unit 27c, an energization amount calculation unit 27d, an energization control unit 27e, a current value prediction unit 27f, a determination unit 27g, and a correction unit Section 27h.

The target flow rate acquisition unit 27 a acquires the target flow rate of the washing water sprayed from the nozzle device 25 . The target flow rate acquisition unit 27a acquires the target flow rate selected by the first switch 11 as the target flow rate of the washing water.

The flow rate control unit 27b controls the nozzle device 25 so that the flow rate of the washing water becomes the target flow rate acquired by the target flow rate acquisition unit 27a. Specifically, the flow rate control unit 27b outputs a control command value for adjusting the flow path cross-sectional area of the water path of the flow path changeover valve 25a to the drive unit M of the flow path changeover valve 25a.

The target temperature acquisition unit 27c acquires the target temperature of the washing water sprayed from the nozzle device 25 . The target temperature acquisition unit 27c acquires the target temperature selected by the second switch 12 as the target temperature of the washing water.

The energization amount calculation unit 27d calculates the energization amount to be energized to the heater 23a so that the discharge temperature detected by the discharge temperature sensor 23b becomes the target temperature acquired by the target temperature acquisition unit 27c. Specifically, the energization amount calculation unit 27d executes PID (Proportional-Integral-Differential, one of feedback control) based on the difference between the discharge temperature detected by the discharge temperature sensor 23b and the target temperature acquired by the target temperature acquisition unit 27c. proportional integral derivative control) control. Since the heater 23a is controlled by PWM (Pulse Width Modulation), the energized amount can be calculated from the duty ratio.

The energization control unit 27e controls to energize the heater 23a based on the energization amount calculated by the energization amount calculation unit 27d when the washing water flows. Specifically, when the flow switch 22b detects that there is washing water, the energization control unit 27e outputs the energization amount calculated by the energization amount calculation unit 27d as a control command value to the heater 23a.

The current value prediction unit 27f predicts the heater current value based on the target temperature acquired by the target temperature acquisition unit 27c, the water supply temperature detected by the water supply temperature sensor 22a, and the target flow rate acquired by the target flow rate acquisition unit 27a. Specifically, the current value predicting unit 27f predicts (calculates) the heater current value using the equation (1) for calculating the heat of the flowing fluid and the equation (2).

(Equation 1)

P1=ΔT×(0.278×c×ρ×Q)/α…(1)

(Equation 2)

In the mathematical formula (1), P1 is the heat (W), ΔT is the temperature difference of the fluid (°C), c is the specific heat (kJ/Kg·°C), ρ is the density (Kg/L), and Q is the flow rate (L /hour), α is the thermal efficiency. In addition, in the formula (2), I is the heater current value (A), P2 is the power value (W) of the heater 23a, and R is the resistance value (Ω) of the heater 23a.

Here, the heater current value is predicted (calculated) when the target flow rate is 570 mL/min, the target temperature is 40°C, and the water supply temperature is 5°C. In this case, in the mathematical formula (1), ΔT=40-5=35(°C), c=4.18(kJ/Kg·°C), ρ=1(Kg/L), Q=570×60 /1000 (L/hour), and α=0.95, P1=1464.2 (W) can be calculated.

In addition, in the formula (2), P2, which is the power value of the heater 23a, corresponds to P1, which is the amount of heat. Thus, P2=P1=1464.2(W). Further, as described above, since R=6.67(Ω), I=14.82(A) can be calculated. That is, in this case, the current value predictor 27f predicts the heater current value to be 14.82A.

The determination unit 27g determines whether or not a current value difference, which is the difference between the predicted current value and the detected current value, is equal to or less than a predetermined current value difference, the predicted current value being the heater current value predicted by the current value predicting unit 27f, and the detected current value. is the heater current value detected by the current sensor 26 . Specifically, the current value difference is calculated as the absolute value of the difference between the predicted current value and the detected current value.

The specified current value difference is set based on fluctuations within a normal range such as the rated voltage or the resistance value of the heater 23a. When the rated voltage or the resistance value of the heater 23a is within a normal range and the cleaning function unit 20 is not abnormal, the difference between the predicted current value and the detected current value is relatively small, so the current value difference is equal to or less than the specified current value difference.

On the other hand, when the supply voltage or the resistance value of the heater 23a deviates from the normal range, or when, for example, the cleaning function section 20 becomes abnormal such that the flow rate becomes relatively small, the difference between the predicted current value and the detected current value is relatively compared. is larger, so the current value difference becomes larger than the specified current value difference. The specified current value difference is, for example, 2A.

When the heater current value (detected current value) detected by the current sensor 26 is equal to or greater than the specified current value, the correction unit 27h performs correction to reduce the energization amount calculated by the energization amount calculation unit 27d. The specified current value is set to be equal to or less than the rated current (eg, 15 A) of a domestic molded box circuit breaker (circuit breaker (safety circuit breaker): not shown) disposed between the system power supply and the local cleaning device 1 . In the first embodiment, the specified current value is set to be 14.5 A smaller than the rated current.

Further, when the determination unit 27g determines that the current value difference is equal to or smaller than the specified current value difference and the detected current value is equal to or greater than the specified current value, the correction unit 27h performs correction (details will be described later).

The correction unit 27h performs correction using a correction value calculated based on the ratio of the heater current value (detected current value) detected by the current sensor 26 and the designated current value. Specifically, the correction unit 27h corrects the energization amount by calculating the correction value using the equation (3), and multiplying the energization amount calculated by the energization amount calculation unit 27d by the correction value.

In the first embodiment, as shown in the equation (3), the correction value is the square of the ratio of the detected current value to the specified current value. X is the correction value, Is is the specified current value, and Ik is the detection current value. It should be noted that each of the above-described mathematical expressions and each of the constants are stored in a storage unit (not shown) included in the control device 27 .

(Equation 3)

X=(Is/Ik) ² …(3)

Next, in the above-mentioned partial washing apparatus 1, the operation|movement at the time of performing a buttock washing|cleaning is demonstrated. In the standby state of the partial washing apparatus 1 (the state in which the buttocks washing and the vaginal washing are not performed), the control device 27 sets the water stop solenoid valve 21a to the closed state. Moreover, the control apparatus 27 connects the flow-path switching valve 25a to the 1st connection water path L1 and the drain path Ld, and sets the heater 23a into a non-conductive state.

When the partial washing apparatus 1 is in the standby state, when a switch (not shown) for washing the buttocks is turned on, the control device 27 executes the washing of the buttocks. Specifically, the control device 27 opens the water stop solenoid valve 21 a and drives the pump 24 .

Thereby, the washing water flows from the water supply device 21 toward the nozzle device 25 in the first connection water passage L1. In addition, at this time, since the heater 23a is in a non-energized state, and the washing water is not heated, the water supply temperature sensor 22a detects the water supply temperature. Then, when the flow switch 22b detects that there is washing water, the controller 27 energizes the heater 23a (the target temperature acquiring unit 27c, the energization amount calculating unit 27d, and the energization control unit 27e) so that the temperature of the washing water becomes The target temperature selected by the second switch 12 .

Then, when the temperature detected by the discharge temperature sensor 23b becomes the target temperature, the control device 27 controls the flow path switching valve 25a so that the first connection water path L1 and the second connection water path L2 are connected. Further, the control device 27 controls the flow path switching valve 25 a (target flow rate acquisition unit 27 a, flow rate control unit 27 b ) so that the flow rate of the washing water becomes the target flow rate selected by the first switch 11 . Thereby, the washing water is ejected from the buttock nozzle 25b at the target flow rate. During the buttock washing, the washing water is heated by the heater 23a so that the temperature of the washing water becomes the target temperature.

When performing the above-mentioned buttock washing, when a switch (not shown) for stopping the buttock washing is turned on, the control device 27 stops the buttock washing. Specifically, the control device 27 stops energization to the heater 23a, and controls the flow rate switching valve 25a so that the first connection water passage L1 and the drainage passage Ld are connected. Furthermore, the control apparatus 27 stops the drive of the pump 24, and sets the water stop solenoid valve 21a into a closed state. Thereby, the local cleaning apparatus 1 returns to the standby state.

Next, the operation in the case where the energization amount is corrected in the local cleaning apparatus 1 described above will be described along the flowchart of FIG. 3 . When the heater 23a is energized, the flowchart shown in FIG. 3 is executed every first designated time. The first designated time is set to a time shorter (eg, 1 second) than the operating time of a domestic molded box circuit breaker.

The control device 27 acquires the target flow rate (target flow rate acquisition unit 27a) in step S102, and acquires the target temperature (target temperature acquisition unit 27c) in step S104. Furthermore, the control apparatus 27 detects the water supply temperature in step S106, and detects the discharge temperature in step S108. Then, the control device 27 calculates the energized amount in step S110 (the energized amount calculation unit 27d).

Here, when the target temperature is 40°C and the water supply temperature is 5°C, the case where the energization amount becomes relatively large because the rated voltage, the resistance value of the heater 23a and the like fluctuate within a normal range will be described. When the difference between the target temperature and the water supply temperature is constant, the energization amount can be calculated using the equations (1), (4), and (5).

In this case, in the mathematical formula (1), ΔT=35 (°C), c=4.18 (kJ/Kg·°C), ρ=1 (Kg/L), and α=0.95. With respect to 570 mL/min, which is the maximum target flow rate among the plurality of target flow rates, and considering the fluctuation, Q (flow rate) was set to: Q=590×60/1000 (L/hour). In this case, P1=1515.6(W). As described above, this P1 corresponds to P2 (P1=P2) which is the power value of the heater 23a.

As shown in the formula (4), D, which is the energized amount, can be calculated as a ratio of P2 to P3, which is the power of the heater 23a when the energized amount is 100%. In addition, P3 can be calculated by the mathematical formula (5). E is the voltage value applied to the heater 23a, and R is the resistance value of the heater 23a.

(Equation 4)

D=(P2/P3)×100…(4)

(Equation 5)

P3=E ² /R...(5)

With respect to the rated voltage (100V) and considering the fluctuation, set E=107 (V), with respect to the resistance value (6.67Ω) of the heater 23a and considering the fluctuation, set R=6.13 (Ω). In this case, P3=1867.7(W), D=81.1%.

Furthermore, the control apparatus 27 calculates a predicted current value (current value prediction part 27f) in step S112. In this case, as in the above-mentioned case, the predicted current value is 14.82A.

Next, the control device 27 detects the detected current value in step S114. When the power value (P2) of the heater 23a is 1515.6W and the resistance value (R) of the heater 23a is 6.13Ω, the detected current value detected by the current sensor 26 can be calculated using the mathematical formula (2), as

Then, in step S116, the control device 27 determines whether or not the current value difference is equal to or less than the specified current value difference. For example, when the flow rate of the washing water becomes relatively small due to the mixing of foreign matter into the buttock nozzle 25b, the energization amount and the detected current value become relatively small.

Thus, when the difference in current value becomes larger than the specified difference in current value because the difference between the predicted current value and the detected current value becomes relatively large, the control device 27 determines "YES" in step S116. In this case, the control device 27 blinks the warning lamp 13 and ends the routine in step S118.

On the other hand, when the cleaning function part 20 is not abnormal and the fluctuation of the rated voltage or the resistance value of the heater 23a is within the normal range as described above, the difference between the predicted current value and the detected current value becomes relatively small. Furthermore, as described above, when the predicted current value is 14.82 A and the detected current value is 15.72 A, the current value difference is 0.90, which is smaller than the specified current value difference (=2). In this case, the control device 27 determines "NO" in step S116, and executes the energization amount correction control in step S120.

When the energization amount correction control is executed, as shown in FIG. 4 , the control device 27 determines in step S202 whether or not the detected current value is equal to or greater than the specified current value. For example, when the smallest target flow rate is selected among the plurality of target flow rates, the power value of the heater 23a and even the detected current value become relatively small. As a result, when the detected current value is smaller than the specified current value, the control device 27 determines "NO" in step S202, does not correct the energized amount, and ends the energized amount correction control.

On the other hand, when the detected current value is 15.72 A as described above, since the detected current value is equal to or greater than the specified current value, the control device 27 determines "YES" in step S202, and the routine proceeds to step S204.

The control apparatus 27 calculates a correction value (correction part 27h) in step S204. As described above, when the specified current value is 14.5A and the detection current value is 15.72A, the correction value is 0.85. Furthermore, the control device 27 corrects the amount of energization in step S206 (correction unit 27h). As described above, when the energized amount is 81.1%, the energized amount is corrected to: 68.9 (=81.1×0.85)%. Then, the control device 27 returns the procedure to step S202.

小于指定电流值。因此，模压盒式断路器不工作。应予说明，在这种情况下，喷出温度大约推移至38℃。Since the energization amount is corrected to 68.9%, the power value of the heater 23a is reduced from 1515.5W to 1286.8(=P3×D/100=1867.7×68.9/100)W. Also, in this case, the detection current value changes from 15.72A to

less than the specified current value. Therefore, the molded box circuit breaker does not work. In this case, the discharge temperature was shifted to about 38°C.

In this way, when correction is made to reduce the energization amount, the power value of the heater 23a decreases, and the detected current value is smaller than the specified current value, the control device 27 determines "NO" in step S202 and ends the energization amount correction control. When the energization amount correction control ends, the routine shown in FIG. 3 ends.

Next, a conventional product in which the amount of energization is not corrected as described above will be described. As shown in FIG. 5 , even in the conventional product, the power value of the heater fluctuates within the range indicated by the arrow with respect to the rated power due to fluctuations in the rated voltage or the resistance value of the heater 23a. When the heater current value increases according to the fluctuation, the rated power of the heater is also set so that the molded box circuit breaker does not operate.

In addition, since the amount of heat given to the washing water per unit time is determined according to the rated power of the heater, the target flow rate is set according to the rated power of the heater. In the case of a conventional product in which the energization amount is not corrected as in the present invention, for example, when the target temperature is set to 40°C, the rated power of the heater is set to 1200W in consideration of the water supply temperature (5°C), and the maximum target The flow rate was set at 450 mL/min.

On the other hand, when the energization amount is corrected to be small as described above, even if the power value of the heater 23a fluctuates to increase due to fluctuations in the rated voltage or the like, the detected current value becomes equal to or greater than the specified current value. In this case, the power value and the detected current value of the heater 23a are also suppressed. Therefore, the molded box circuit breaker will not work. Therefore, when the amount of energization is corrected to be reduced as described above, the rated power of the heater 23a can be increased in the product of the present invention as shown in FIG. 5 compared to the conventional product. Thereby, the maximum target flow rate of the product of the present invention can be increased compared to the maximum target flow rate (450 mL/min) of the conventional product (as described above, the maximum target flow rate of the first embodiment is 570 mL/min).

According to the first embodiment, the local washing device 1 washes the part of the human body by spraying the washing water introduced from the water supply source W. The local cleaning device 1 includes a heater 23a, a current sensor 26, a nozzle device 25, a discharge temperature sensor 23b, and a control device 27, and the heater 23a is energized to heat the cleaning water introduced from the water supply source W; the current The sensor 26 detects the heater current value, which is the value of the current flowing through the heater 23a; the nozzle device 25 sprays the washing water heated by the heater 23a; the spray temperature sensor 23b sprays the The temperature is detected, and the spray temperature is the temperature of the washing water sprayed from the nozzle device 25 ; the control device 27 controls at least the nozzle device 25 . The control device 27 includes a target temperature acquisition unit 27c, an energization amount calculation unit 27d, an energization control unit 27e, and a correction unit 27h. The target temperature acquisition unit 27c acquires a target temperature of the washing water sprayed from the nozzle device 25; The unit 27d calculates the amount of energization to energize the heater 23a so that the discharge temperature detected by the discharge temperature sensor 23b becomes the target temperature obtained by the target temperature obtaining unit 27c; Control is performed so that the heater 23a is energized based on the energization amount calculated by the energization amount calculation unit 27d; when the heater current value detected by the current sensor 26 is equal to or greater than a specified current value, the correction unit 27h reduces the energization amount Correction of the energization amount calculated by the calculation unit 27d.

Accordingly, when the heater current value detected by the current sensor 26 is equal to or greater than the specified current value, since the correction is performed so that the energization amount to the heater 23a calculated by the energization amount calculation unit 27d is reduced, the amount of energization to the heater 23a flows through the heater 23a. The heater current value becomes smaller. Therefore, even in the case where the heater current value becomes relatively large, since the heater current value is suppressed, it is possible to suppress the operation of the domestic molded box circuit breaker. Therefore, the rated power of the heater 23a can be set to be relatively large, and the amount of heat that can be given to the washing water per unit time can be relatively increased. Therefore, in the instantaneous hot water supply type local washing apparatus 1, the washing water can increase in traffic.

In addition, the correction unit 27h performs correction using a correction value calculated based on the ratio of the heater current value detected by the current sensor 26 and the specified current value.

Thereby, correction is made so that the energization amount is reliably reduced, and the heater current value is reliably suppressed.

Moreover, the local cleaning apparatus 1 is further provided with the water supply temperature sensor 22a which detects the water supply temperature which is the temperature of the wash water introduced from the water supply source W. The control device 27 further includes a target flow rate acquisition unit 27a, a current value prediction unit 27f, and a determination unit 27g. The target flow rate acquisition unit 27a acquires a target flow rate of the washing water sprayed from the nozzle device 25; the current value prediction unit 27f is based on the The target temperature acquired by the target temperature acquisition unit 27c, the water supply temperature detected by the water supply temperature sensor 22a, and the target flow rate acquired by the target flow rate acquisition unit 27a predict the heater current value; It is determined whether or not the difference between the current values, which is the heater current value predicted by the current value predictor 27f, and the detected current value, is the heater current value detected by the current sensor 26, is equal to or less than a predetermined current value difference. When the determination unit 27g determines that the current value difference is equal to or less than the specified current value difference and the detected current value is equal to or greater than the specified current value, the correction unit 27h performs correction.

Accordingly, when the current value difference between the predicted current value and the detected current value is larger than the specified current value difference, it can be determined that the cleaning function unit 20 or the like is abnormal. In addition, when it is determined that the cleaning function unit 20 or the like is not abnormal because the current value difference between the predicted current value and the detected current value is equal to or less than the specified current value difference and the heater current value is equal to or greater than the specified current value, the correction of the energization amount can be performed reliably. .

In addition, the specified current value is set to be equal to or less than the rated current of a domestic molded box circuit breaker.

Thereby, the operation|movement of a domestic molded box circuit breaker can be suppressed reliably.

In addition, the rated power of the heater 23a is set to 1300W or more.

Thereby, the flow rate of wash water can be reliably increased.

(Second Embodiment)

Next, the local cleaning apparatus 1 according to the second embodiment of the present invention will be mainly described with respect to the parts different from those of the first embodiment described above.

The correction unit 27h of the above-described first embodiment performs correction using the correction value calculated based on the ratio of the detected current value to the specified current value, but the correction unit 127h of the second embodiment corrects the energization amount using the specified energization amount. Specifically, the correction unit 127h subtracts the specified energization amount from the energization amount calculated by the energization amount calculation unit 27d.

The specified energization amount is set to the energization amount equivalent to the specified temperature difference. The predetermined temperature difference is set to a temperature difference (eg, 0.5° C.) at which the user hardly feels the drop in the discharge temperature even when the discharge temperature drops by the predetermined temperature difference within the second predetermined time. The second designated time is set to a shorter time (eg, 0.2 seconds) than the first designated time.

Note that, when the energization amount correction control is executed, the flowchart shown in FIG. 4 is executed in the above-described first embodiment, but the flowchart shown in FIG. 6 is executed in the second embodiment.

When the energization amount correction control is executed, the control device 27 determines in step S302 whether or not the detected current value is equal to or greater than the specified current value, as in step S202 described above. When the detected current value is equal to or greater than the specified current value, the control device 27 determines "YES" in step S302, and the routine proceeds to step S304.

The control device 27 corrects the energized amount using the designated energized amount in step S304 (correction unit 127h). Next, in step S306, the control device 27 determines whether or not the second designated time has elapsed. When the second designated time has not elapsed, the control device 27 determines "NO" in step S306, and repeats step S306.

On the other hand, when the second designated time has elapsed, the control device 27 determines "YES" in step S306, and the program returns to step S302. In this way, the control device 27 repeatedly executes steps S302 to S306 until the detected current value becomes smaller than the specified current value.

According to the second embodiment, the correction unit 127h performs correction using the specified energization amount, which is the energization amount corresponding to the specified temperature difference.

Thereby, correction is made so that the energization amount is reliably reduced, and the heater current value is reliably suppressed.

(Variation)

In addition, although an example of a local cleaning apparatus was shown in each said embodiment, this invention is not limited to this, Other structures may be employ|adopted for this invention. For example, the correction units 27h and 127h may perform correction when the detected current value is equal to or greater than the specified current value regardless of the determination result of the determination unit 27g.

In addition, in the above-described first embodiment, as shown in the formula (3), the correction value is the square of the ratio of the detection current value to the designated current value, but as shown in the formula (6), the detection current value is also used. The ratio of the specified current value in place of the above correction value.

(Math 6)

X=Is/Ik...(6)

In addition, in each of the above-described embodiments, the cleaning function unit 20 includes the pump 24, but may not include the pump 24 instead of the above-described configuration.

In addition, the values of rated power, specified current value, specified current value difference, specified time, specified temperature difference, specified energization amount, and specified current value of heater 23a may be changed without departing from the gist of the present invention.

Symbol Description

1...partial cleaning device, 10...operation part, 20...cleaning function part, 22a...water supply temperature sensor, 23a...heater, 23b...discharge temperature sensor, 25...nozzle device, 26...current sensor, 27...control device, 27a... target flow rate acquisition unit, 27b... flow rate control unit, 27c... target temperature acquisition unit, 27d... energization amount calculation unit, 27e... energization control unit, 27f... current value prediction unit, 27g... determination unit, 27h... correction unit.

Claims (10)

1. A local cleaning device, which cleans a part of a human body by spraying cleaning water introduced from a water supply source, comprising: a heater that heats the washing water introduced from the water supply source by being energized; a current sensor, the current sensor detects a heater current value, the heater current value being the value of the current flowing through the heater; a nozzle device that sprays the washing water heated by the heater; an ejection temperature sensor that detects an ejection temperature, the ejection temperature being the temperature of the washing water ejected from the nozzle device; and a control device that controls at least the nozzle device, The control device includes: a target temperature acquisition unit, the target temperature acquisition unit acquires a target temperature of the washing water sprayed from the nozzle device; an energization amount calculation unit that energizes the heater so that the discharge temperature detected by the discharge temperature sensor becomes the target temperature acquired by the target temperature acquisition unit Calculate the amount of electricity; an energization control section that controls, when the washing water flows, to energize the heater according to the energization amount calculated by the energization amount calculation section; and The correction unit performs correction for reducing the energization amount calculated by the energization amount calculation unit when the heater current value detected by the current sensor is equal to or greater than a predetermined current value. 2. The spot cleaning device of claim 1, wherein: The correction unit performs the correction using a correction value calculated based on a ratio of the heater current value detected by the current sensor to the specified current value. 3. The spot cleaning device of claim 1, wherein: The correction unit performs the correction using a specified energization amount that is the energization amount corresponding to a specified temperature difference. 4. The local cleaning device according to any one of claims 1 to 3, further comprising: a water supply temperature sensor, the water supply temperature sensor detects the water supply temperature, and the water supply temperature is the temperature of the washing water introduced from the water supply source, The control device further includes: a target flow rate acquisition unit that acquires a target flow rate of the washing water sprayed from the nozzle device; A current value predicting unit based on the target temperature acquired by the target temperature acquiring unit, the water supply temperature detected by the water supply temperature sensor, and the result acquired by the target flow rate acquiring unit said target flow rate, said heater current value is predicted; and a determination unit that determines whether a current value difference, which is a difference between a predicted current value and a detected current value, is equal to or less than a specified current value difference, the predicted current value being the heating predicted by the current value predicting unit a heater current value, the detected current value is the heater current value detected by the current sensor, The correction unit performs the correction when the determination unit determines that the current value difference is equal to or smaller than the specified current value difference and the detected current value is equal to or greater than the specified current value. 5. The topical cleaning device of any one of claims 1 to 3, wherein, The specified current value is set to be equal to or lower than the rated current of a domestic molded box circuit breaker. 6. The spot cleaning device of claim 4, wherein: The specified current value is set to be equal to or lower than the rated current of a domestic molded box circuit breaker. 7. The topical cleaning device of any one of claims 1 to 3, wherein, The rated power of the heater is set to 1300W or more. 8. The spot cleaning device of claim 4, wherein: The rated power of the heater is set to 1300W or more. 9. The spot cleaning device of claim 5, wherein: The rated power of the heater is set to 1300W or more. 10. The spot cleaning device of claim 6, wherein, The rated power of the heater is set to 1300W or more.

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