JP2012202101A - Sanitary washing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a user with wide varieties of washing feelings by achieving a gentle washing feeling with little pulsation feeling when a set flow rate is low and achieving a firm washing feeling with a stimulation feeling when the set flow rate is high.SOLUTION: A sanitary washing device which allows selection of wide varieties of washing feelings that a user prefers from the gentle washing feeling with little pulsation stimulation at a low set flow rate to a strong washing feeling accompanied by the pulsation stimulation feeling at a high set flow rate is provided by: a first vacuum breaker 31 branched and connected to an upstream side of a fixed orifice 9 provided in a front flow path 202 that distributes washing water from a supply source to a heat exchanger 12; a second vacuum breaker 61 branched and connected to a rear flow path 203 provided between the heat exchanger 12 and a human body washing nozzle 30; pulsation generation means 14 provided between the heat exchanger 12 and the second vacuum breaker 61, for generating pulsation in the washing water; and flow rate setting means 307 and 308 for setting a flow rate of the washing water to be discharged from the human body washing nozzle 30.

Description

  The present invention relates to a sanitary washing device for washing a local part of a human body.

  Conventionally, when this type of sanitary washing apparatus has a small washing flow rate set by the user, the amplitude of the fluctuation in the pressure of the washing water supplied to the nozzle is increased to increase the sense of irritation during washing. When the cleaning flow rate set by the user is large, there is a configuration that weakens the pulsation feeling by reducing the amplitude of the pressure fluctuation of the cleaning water supplied to the nozzle (see, for example, Patent Document 1).

JP 2001-312001 A

  However, in the conventional configuration, when the set flow rate for cleaning is small, the pressure fluctuation range is increased to increase the sense of irritation, so the user feels the cleaning pressure strong, and conversely, when the set flow rate is large. Since the pressure fluctuation range is reduced and the feeling of irritation is weakened, the user feels the washing pressure weak, and the user feels that the width of the washing feeling that can be set is narrow, There was a problem that it was not possible to respond to a wide variety of user preferences.

  For users who want a weak feeling of cleaning, especially because of hemorrhoids, it is impossible to respond when the cleaning level is strongest even if the cleaning level is lowered to the minimum, so the range of adjustment of the cleaning strength including the weak feeling of cleaning is expanded. There was a need to do. In addition to the surface pressure of the jet, the strength felt when the jet hits the human body is largely influenced by fluctuations in the strength of the jet. If there is no fluctuation in the strength of the jet and the human body hits the human body with a uniform strength, this sense of strength will soon saturate and the strength will not be felt. When there is a fluctuation in the strength of the jet, the sense of strength is constantly updated, which gives a strong feeling of cleaning. Moreover, when the strength of the jet is changed, the flow velocity on the cleaning surface of the human body is changed, so that the mixing effect is increased and the cleaning effect can be enhanced. Therefore, in adjusting the cleaning strength, the pressure fluctuation range is an important adjustment factor in addition to the surface pressure (flow rate), and it has been a problem to be able to adjust the pressure fluctuation range simultaneously with the adjustment of the cleaning strength.

  The present invention solves the above-described conventional problems. When the set flow rate is small, the pulsation feeling is small, and a gentler washing feeling is realized. Conversely, when the set flow rate is large, a firm feeling with irritation is achieved. The purpose is to provide a user with a wide sense of cleaning by realizing a feeling of cleaning.

In order to solve the conventional problem, the sanitary washing device of the present invention is a sanitary washing device that supplies cleaning water supplied from a supply source to the human body,
A human body cleaning nozzle that discharges cleaning water to clean the human body;
A heat exchanger for heating the wash water;
A pre-flow path that is provided between the supply source and the heat exchanger and distributes wash water from the supply source to the heat exchanger;
A post-flow path that is provided between the heat exchanger and the human body washing nozzle and distributes washing water from the heat exchanger to the human body washing nozzle;
A fixed orifice provided in the front channel;
A first vacuum breaker branch connected to the upstream side of the fixed orifice of the front flow path;
A second vacuum breaker branched and connected to the rear flow path;
Pulsation generating means between the heat exchanger in the rear flow path and the second vacuum breaker for causing pulsation in the washing water;
Flow rate setting means for setting a flow rate of cleaning water discharged from the human body cleaning nozzle;
It is equipped with.

  In this case, the pulsation generating means between the heat exchanger and the second vacuum breaker is a positive displacement pump, and the positive displacement pump has a characteristic that the discharge flow rate fluctuates periodically, and corresponds to this fluctuating flow rate. Then, the outlet pressure of the positive displacement pump changes and pulsation occurs. The minimum pressure at the time of pulsation of the outlet pressure of this positive displacement pump is almost equal to the inlet pressure of the positive displacement pump, and the maximum pressure at the time of pulsation does not change when the flow rate is controlled to be constant. Will be smaller. This operation is not limited to the positive displacement pump, and the same effect is obtained not only in other pulsation generating means such as means for generating pulsation by driving an electromagnetic pump.

  Thus, in the sanitary washing device according to the present invention, the supplied wash water is flow-controlled based on the set flow rate set by the flow rate setting means, and the incoming pressure of the wash water before entering the pulsation generating means is Because of the fixed orifice provided in the front flow path, when the set flow rate is small, the positive pressure pump inlet pressure becomes high, and when the set flow rate is high, the positive pressure pump inlet pressure becomes low. , The amplitude of pulsation is small, and the amplitude of pulsation is large during strong cleaning.

  Furthermore, the human body includes a first vacuum breaker that is branched and connected to the front flow path that is upstream of the heat exchanger, and a second vacuum breaker that is branched and connected to the rear flow path that is downstream of the heat exchanger. The backflow of sewage from the washing nozzle or the like is prevented, and the washing water in the heat exchanger is prevented from being accidentally washed away from the human body washing nozzle or the like and becoming empty.

  When the set flow rate is small, the sanitary washing device of the present invention has a small pulsation feeling and can realize a gentler feeling of washing. Conversely, when the set flow rate is large, the pulsation feeling is large and the irrigation feeling is firmly washed. It is possible to provide a wide sense of cleaning for the user and to prevent the heat exchanger from being blown.

The perspective view of the toilet apparatus to which the sanitary washing apparatus in Embodiment 1 of this invention is applied. Front view of the remote operation device of the sanitary washing device in the first embodiment Schematic diagram of the sanitary washing device in the first embodiment The perspective view inside the main-body part of the sanitary washing apparatus in Embodiment 1 Sectional drawing of the pressure-reduction valve which is a water_in_pressure adjustment means of the sanitary washing apparatus in Embodiment 1 Sectional drawing of the fixed orifice and vacuum breaker of the sanitary washing apparatus in Embodiment 1 Sectional drawing of the positive displacement pump of the sanitary washing apparatus in Embodiment 1 Explanatory drawing which shows the pulsation amplitude for every setting flow volume of the sanitary washing apparatus in Embodiment 1.

A first invention is a sanitary washing apparatus that supplies washing water supplied from a supply source to a human body, and discharges washing water to wash the human body,
A heat exchanger for heating the wash water;
A pre-flow path that is provided between the supply source and the heat exchanger and distributes wash water from the supply source to the heat exchanger;
A post-flow path that is provided between the heat exchanger and the human body washing nozzle and distributes washing water from the heat exchanger to the human body washing nozzle;
A fixed orifice provided in the front channel;
A first vacuum breaker branch connected to the upstream side of the fixed orifice of the front flow path;
A second vacuum breaker branched and connected to the rear flow path;
Pulsation generating means between the heat exchanger in the rear flow path and the second vacuum breaker for causing pulsation in the washing water;
Flow rate setting means for setting a flow rate of cleaning water discharged from the human body cleaning nozzle;
It is equipped with.

  In this case, the pulsation generating means between the heat exchanger and the second vacuum breaker is a positive displacement pump, and the positive displacement pump has a characteristic that the discharge flow rate fluctuates periodically, and corresponds to this fluctuating flow rate. Then, the outlet pressure of the positive displacement pump changes and pulsation occurs. The minimum pressure at the time of pulsation of the outlet pressure of this positive displacement pump is almost equal to the inlet pressure of the positive displacement pump, and the maximum pressure at the time of pulsation does not change when the flow rate is controlled to be constant. Will be smaller. This operation is not limited to the positive displacement pump, and the same effect is obtained not only in other pulsation generating means such as means for generating pulsation by driving an electromagnetic pump.

  Thus, in the sanitary washing device according to the present invention, the supplied wash water is flow-controlled based on the set flow rate set by the flow rate setting means, and the incoming pressure of the wash water before entering the pulsation generating means is Because of the fixed orifice provided in the front channel, the inlet pressure of the positive displacement pump increases when the set flow rate is low, and the inlet pressure of the positive displacement pump decreases when the set flow rate is high. The amplitude of pulsation is small, and the amplitude of pulsation is large during strong cleaning.

  This is because the fixed orifice provided in the front flow path has a smaller pressure loss as the flow rate decreases, and the pressure loss increases as the flow rate increases. Therefore, when the set flow rate is low, the pressure loss at the fixed orifice is small. This is because the pressure of the cleaning water supplied to the inlet of the positive displacement pump is high, and when the set flow rate is large, the pressure loss at the fixed orifice is large, so the pressure of the cleaning water supplied to the inlet of the positive displacement pump is low.

  Furthermore, the human body includes a first vacuum breaker that is branched and connected to the front flow path that is upstream of the heat exchanger, and a second vacuum breaker that is branched and connected to the rear flow path that is downstream of the heat exchanger. The backflow of sewage from the washing nozzle or the like is prevented, and the washing water in the heat exchanger is prevented from being accidentally washed away from the human body washing nozzle or the like and becoming empty.

  As a result, when the set flow rate is small, the pulsation feeling is small, and a gentler washing feeling can be realized, and conversely, when the set flow rate is large, the pulsation feeling is large and a firm cleaning with a sense of stimulation can be realized, A wide range of cleaning feeling can be provided to the user, and the heat exchanger can be prevented from being blown.

In a second aspect of the invention, in particular, in the configuration of the sanitary washing device according to the first aspect of the invention, the first vacuum breaker is
An inlet through which washing water flows from the front channel;
An outlet through which wash water flows out to the heat exchanger via the fixed orifice;
A vacuum breaker valve provided in a branch pipe on the inlet side of the fixed orifice;
A discharge port provided on the primary side which is the inlet side of the vacuum breaker valve of the branch pipe;
An intake port provided on the secondary side of the vacuum breaker valve of the branch pipe;
The first vacuum breaker may be formed integrally with the fixed orifice.

  In this case, the supplied wash water has a larger pressure after passing through the fixed orifice as the flow rate is smaller, and the pressure after passing through the fixed orifice is smaller as the flow rate is larger.

  Also, the first vacuum breaker releases the negative pressure in the front flow path by taking outside air from the intake port when the upstream front flow path becomes negative pressure and sewage tries to flow backward from the human body washing nozzle Thus, it acts to prevent the risk of sewage flowing backward.

  In addition, the fixed orifice formed integrally with the first vacuum breaker has the flow path reduced by the fixed orifice when the front flow path becomes negative pressure and sewage is about to flow backward from the human body washing nozzle. Therefore, it acts so that the flow rate of the reverse flow is suppressed.

  As a result, the first vacuum breaker takes in the outside air to release the negative pressure, and not only the backflow is prevented, but also when the sewage is about to flow back from the human body washing nozzle, the fixed orifice reduces the flow path. Therefore, by preventing the amount of sewage flowing into the first vacuum breaker, the effect of preventing the risk of backflow can be enhanced.

  Further, since the first vacuum breaker is formed integrally with the fixed orifice, the piping hose is not required and can be simplified, and it is not only compact and space-saving, but also the piping hose is expanded and contracted by internal pressure. The delay and malfunction of the vacuum breaker operation can be prevented, and the functions of the fixed orifice and the vacuum breaker can be ensured.

  In a third aspect of the invention, in particular, in the configuration of the sanitary washing device according to the first aspect or the second aspect, the pulsation generating means may be a positive displacement pump.

  In this case, the supplied wash water can be pressurized by the pulsation generating means with a pressure based on the flow rate set by the flow rate setting means to cause pulsation.

  By using the positive displacement pump as the pulsation generating means for generating this pulsation, when the pressure at the positive displacement pump inlet becomes a certain level or more, the minimum pressure at the pulsation of the positive pressure pump outlet pressure is the value of the positive displacement pump. Since the maximum pressure during pulsation of the outlet pressure of the positive displacement pump does not change because it is almost equal to the inlet pressure, the pressure pulsation width becomes small, and when the pressure at the positive displacement pump inlet is below a certain level, the pressure pulsation width is By increasing the flow rate of the positive displacement pump, the inlet pressure of the positive displacement pump also changes and the pulsation width of the cleaning water changes.

  Thus, by controlling the discharge flow rate of the positive displacement pump, the amplitude of the pulsation can be simultaneously controlled. That is, the pulsation of the wash water generated by the positive displacement pump, which is the pulsation generating means, increases when the set flow rate is small, and increases the positive pressure pump inlet pressure. Therefore, the amplitude of pulsation is small during weak cleaning, and the amplitude of pulsation is large during strong cleaning. Therefore, when the set flow rate is low, the pressure at the positive displacement pump inlet on the downstream side of the incoming water pressure adjusting means is increased and the amplitude of the pulsation is reduced, thereby realizing a gentler washing feeling. When the set flow rate is large, the pressure at the inlet of the positive displacement pump is lowered, and the amplitude of pulsation is increased, so that a firm cleaning with a sense of stimulation can be realized and a wider cleaning feeling can be given to the user. .

  In a fourth aspect of the present invention, in particular, in the configuration of the sanitary washing device according to any one of the first to third aspects, the buffer tank provided in the rear flow path is further provided, and the second vacuum breaker is the buffer tank. May be provided.

  In this case, the buffer tank acts as a temperature buffer for the wash water heated by the heat exchanger. Thereby, generation | occurrence | production of the temperature nonuniformity of the washing water supplied to a human body washing nozzle can be suppressed. Further, since the buffer tank and the second vacuum breaker can be provided integrally, the sanitary washing apparatus can be downsized.

  The fifth aspect of the invention is particularly the configuration of the sanitary washing apparatus according to any one of the first to fourth aspects of the invention, wherein the front flow path is provided upstream of the first vacuum breaker, and water is supplied from the supply source. There may be provided a pressure reducing valve for reducing the pressure of the washed water.

  In this case, since the pressure reducing valve reduces the pressure of the washing water supplied from the supply source and the supply water pressure supplied to the fixed orifice arranged on the downstream side of the pressure reducing valve always acts substantially constant, In the weak cleaning which is one of the effects of the invention of the present invention, the amplitude of pulsation is small and the feeling of pulsation is small, and a gentler feeling of washing can be realized. Even when the supply water pressure of the supply source is different or fluctuates, it is possible to stably obtain an operational effect that can realize a firm cleaning with a sense of irritation.

  In a sixth aspect of the present invention, in particular, in the configuration of the sanitary washing device according to the fifth aspect of the invention, the supply state of the cleaning water provided from the supply source provided on the upstream side of the pressure reducing valve in the front passage is switched. A water stop solenoid valve may be provided. Thereby, a sanitary washing apparatus can be used safely for a long period of time.

(Embodiment 1)
FIG. 1 is an overall view of a toilet device showing a state in which a sanitary washing device according to an embodiment of the present invention is mounted on a toilet bowl. As shown in FIG. 1, the sanitary washing device 100 is mounted on the toilet bowl 700. The sanitary washing device 100 includes a main body 200, a remote operation device 300, a toilet seat 400 and a lid 500. A toilet seat 400 and a lid 500 are attached to the main body 200 so as to be freely opened and closed. In addition, the main body 200 is provided with a cleaning water supply mechanism shown in FIG.

  In FIG. 1, a seating sensor 610 provided in the upper front portion of the main body 200 is shown. The seating sensor 610 is, for example, a reflective infrared sensor. In this case, the seating sensor 610 detects the presence of a user on the toilet seat 400 by detecting infrared rays reflected from the human body.

  FIG. 2 is a front view of the remote control device 300 of FIG. The remote control device 300 is provided with a wide cleaning switch 305, a rhythm cleaning switch 306, a water force setting switch 307, 308, a move cleaning switch 309, and a cleaning position setting switch 310, 311 on the upper portion of the controller main body 301. Under the unit 301, a stop switch 302, a butt switch 303, and a bidet switch 304 for instructing to stop the cleaning operation are provided. The remote operation device 300 is configured to emit signals corresponding to the above switches. For example, when the user presses down the buttocks cleaning button 303 or the bidet cleaning button 304, the human body cleaning nozzle 30 of the main body 200 is moved and the cleaning water is ejected.

  FIG. 3 is a schematic diagram showing the configuration of the main body 200 of the sanitary washing device 100 according to the embodiment of the present invention.

  As shown in FIG. 3, the main body 200 includes a control unit 4, a branch tap 5, a strainer 6, a water stop solenoid valve 7, a pressure reducing valve 8, a fixed orifice 9, a flow sensor 11, a heat exchanger 12, and a temperature sensor 13a. 13b, positive displacement pump 14, buffer tank 15, switching valve 16, human body washing nozzle 30, first vacuum breaker 31, second vacuum breaker 61, toilet nozzle 40 and toilet nozzle motor 40m. The human body cleaning nozzle 30 includes a butt nozzle 1, a bidet nozzle 2, and a nozzle cleaning nozzle 3, and the switching valve 16 includes a switching valve motor 16m.

  As shown in FIG. 3, the branch tap 5 is inserted in the water supply pipe 201 which is a water supply source. A strainer 6, a water stop solenoid valve 7, a pressure reducing valve 8, a fixed orifice 9 and a flow sensor 11 are sequentially connected to a pipe 202 connected between the branch water tap 5 and the heat exchanger 12 and referred to as a front flow path. Inserted. Further, temperature sensors 13a and 13b, a positive displacement pump 14 and a buffer tank 15 are inserted in this order in a pipe 203 connected between the heat exchanger 12 and the switching valve 16 and referred to as a rear flow path.

  The first vacuum breaker 31 includes a branch pipe 204 in a form branched from a pipe (front flow path) 202 between the pressure reducing valve 8 and the fixed orifice 9, and the wash water for the heat exchanger 12 and the toilet nozzle 40 is washed. It arrange | positions in the position above a jet nozzle. One end of a branch pipe 205 is connected to the first vacuum breaker 31. The branch pipe 205 is connected via the first vacuum breaker 31. The toilet nozzle 40 is connected to the other end of the branch pipe 205. The toilet nozzle motor 40 m is attached in the vicinity of the toilet nozzle 40.

  As shown in FIG. 6, the fixed orifice 9 is provided between an inlet 71 through which washing water flows from the front flow path of the first vacuum breaker 31 and an outlet 72 through which washing water flows out to the heat exchanger 12. It is integrally formed. In the first vacuum breaker 31, a vacuum breaker valve 77 is provided in the branch pipe 204 on the inlet 71 side of the fixed orifice 9, and the primary vacuum breaker 31 is closer to the inlet 71 than the vacuum breaker valve 77 in the branch pipe 204. A discharge port 73 is provided on the side, and an intake port 74 is provided on the secondary side of the vacuum breaker valve 77.

  Another second vacuum breaker 61 is provided in the buffer tank 15 and is disposed at a position higher than the upper wall surface of the casing of the heat exchanger 12.

  Next, the flow of cleaning water in the main body 200 and the control of each component of the main body 200 by the control unit 4 will be described.

  First, purified water flowing through the water pipe 201 is supplied to the strainer 6 by the branch tap 5 as cleaning water. The strainer 6 removes dust and impurities contained in the cleaning water.

  Next, the supply state of the wash water is switched by the water stop solenoid valve 7, the pressure of the wash water flowing through the pipe 202 is reduced to a constant pressure by the pressure reducing valve 8, and further reduced by passing through the fixed orifice 9. The The operation of the water stop solenoid valve 7 is controlled by the control unit 4.

  In the pipe 202, the flow rate sensor 11 measures the flow rate of the cleaning water flowing in the pipe 202 and gives the measured flow rate value to the control unit 4. The heat exchanger 12 heats the cleaning water supplied through the pipe 202 to a predetermined temperature. The operation of the heat exchanger 12 is controlled by the control unit 4 based on the measured flow rate value measured by the flow sensor 11.

  Subsequently, the wash water heated by the heat exchanger 12 is pumped to the switching valve 16 through the buffer tank 15 by the positive displacement pump 14. The operation of the positive displacement pump 14 is controlled by the control unit 4.

  The buffer tank 15 functions as a temperature buffer for heated washing water. Thereby, generation | occurrence | production of the temperature nonuniformity of the wash water pumped by the switching valve 16 is suppressed. The total capacity of the heat exchanger 12 and the buffer tank 15 is preferably 15 cc to 30 cc, and more preferably 20 cc to 25 cc.

  In the switching valve 16, the cleaning water pumped from the positive displacement pump 14 is supplied to any one of the buttocks nozzle 1, the bidet nozzle 2, and the nozzle cleaning nozzle 3 by operating the switching valve motor 16 m. Accordingly, the cleaning water is ejected from any one of the butt nozzle 1, the bidet nozzle 2, and the nozzle cleaning nozzle 3. The operation of the switching valve motor 16m is controlled by the control unit 4.

  The butt nozzle 1 and the bidet nozzle 2 are used for cleaning a user's local area. The nozzle cleaning nozzle 3 is used for cleaning the portions of the buttocks nozzle 1 and the bidet nozzle 2 that protrude into the toilet bowl 700.

  A first vacuum breaker 31 is provided between the heat exchanger 12 and the toilet nozzle 40, and another second vacuum breaker 61 is provided between the heat exchanger 12 and the human body washing nozzle 30. . Thereby, the washing water in the heat exchanger 12 flows out through the branch pipe 204, the branch pipe 205, and the toilet nozzle 40, and to the outside through the pipe 203 (rear flow path) and the human body washing nozzle 30. Outflow is prevented. As a result, the emptying of the heat exchanger 12 is prevented.

  Further, the first vacuum breaker 31 prevents backflow of sewage and the like from the toilet nozzle 40 side, and the other second vacuum breaker 61 prevents backflow of sewage and the like from the human body washing nozzle 30 side. .

  FIG. 4 shows an example of the inside of the main body 200.

  Next, the pressure reducing valve 8 will be described. FIG. 5 is a sectional view of the pressure reducing valve.

  The pressure reducing valve 8 includes a diaphragm retainer 44, a decompression spring 46, a spring receiver 45 that slides on the inner wall of the diaphragm retainer 44, a diaphragm 47, a diaphragm washer 48, a decompression valve inflow portion 41, an outflow portion 43, and a flat base portion. 52, a valve body 42 having a diaphragm washer receiver 53, a diaphragm shaft 51, and a diaphragm bearing 49 on which the diaphragm shaft 51 slides.

  The pressure reducing valve 8 is arranged on the downstream side of the water stop electromagnetic valve 7 and the secondary pressure of the pressure reducing valve outlet 43 is set so that the feed water pressure supplied to the fixed orifice arranged on the downstream side is always substantially constant. adjust.

  Next, the fixed orifice 9 will be described. FIG. 6 is a sectional view of the first vacuum breaker 31 having a fixed orifice formed therein.

  The fixed orifice 9 is configured as a part of the outlet 72 of the first vacuum breaker 31. The first vacuum breaker 31 includes an inlet 71, an outlet 72, a vacuum adapter 75 having a fixed orifice 9, a vacuum lid 76 having an outlet 73 and an inlet 74 for a toilet nozzle, a vacuum breaker valve 77, Consists of.

The first vacuum breaker 31 is disposed on the downstream side of the pressure reducing valve 8, and the wash water decompressed to a constant pressure by the pressure reducing valve 8 is supplied into the first vacuum breaker 31 from the inflow port 71. When the switching valve 16 is open, it flows to the outlet 72 through the fixed orifice 9. At this time, the smaller the flow rate, the smaller the pressure loss due to the fixed orifice 9 and the higher the pressure at the outflow port 72. The higher the flow rate, the greater the pressure loss due to the fixed orifice 9 and the lower the pressure at the outflow port 72. Therefore, when the set flow rate is changed, the pressure at the inlet of the positive displacement pump 14 changes.

  Further, when the switching valve 16 is closed, the washing water is supplied to the toilet nozzle discharge port 73.

  Further, in normal times, the washing water pushes up the vacuum breaker valve 77 by water pressure, so that the flow path to the intake port 74 is closed, but when the upstream side becomes negative pressure, the vacuum breaker valve 77 is closed. Then, outside air is taken in from the intake port 74 and the negative pressure on the upstream side is released, so that the risk of sewage flowing back from the human body washing nozzle 30 can be prevented.

  Even if sewage tries to flow backward from the human body washing nozzle 30, the flow path of the sewage flowing from the outlet 72 is reduced by the fixed orifice 9, so that the sewage can be prevented from flowing backward.

  Next, the positive displacement pump 14 will be described. FIG. 7 is a cross-sectional view of the positive displacement pump 14.

  The positive displacement pump 14 has a cylindrical space 82 formed in the main body 81, a pressure feed piston 83 is provided in the cylindrical space 82, and the cylindrical space 82 is formed by the pressure feed piston 83 into the pump chamber 82a and the pump chamber 82b. And divided. A cleaning water inflow portion 84 is provided on one side of the main body 81, and a cleaning water outflow portion 85 is provided on the other side. The heat exchanger 12 is connected to the inflow part 84 via a pipe 203 (rear flow path), and the switching valve 16 is connected to the outflow part 85 via a pipe 203 (rear flow path).

  A gear 87 is attached to the rotating shaft of the motor 86, and the gear 88 meshes with the gear 87. The link mechanism 89 connected to the gear 88 converts the pumping piston 83 into a reciprocating motion. When the motor 86 rotates, the pressure-feed piston 83 reciprocates via the gear 87, the gear 88, and the link mechanism 89.

  Therefore, when the pumping piston 83 moves downward and the volume of the pump chamber 82a is increased, the pressure in the pump chamber 82a is lower than that in the inflow portion 84, so that the washing water is supplied from the inflow portion 84a to the pump chamber 82a. To be supplied. On the other hand, when the pumping piston 83 moves upward and the volume of the pump chamber 82a is reduced, the pressure in the pump chamber 82a becomes higher than that in the outflow portion 85, so that the washing water flows from the pump chamber 82a to the outflow portion 85a. Discharged.

  Thereby, when the cleaning water in the pump chamber 82a is discharged from the outflow portion 85a, the cleaning water from the inflow portion 84b is supplied into the pump chamber 82b, and the cleaning water in the pump chamber 82a is supplied from the inflow portion 84a. At this time, the cleaning water in the pump chamber 82b is discharged from the outflow portion 85b.

  Therefore, when the pumping piston 83 moves up and down, pressure is alternately applied to the cleaning water in the pump chamber 82a or the pump chamber 82b, and the speed at which the pumping piston 83 reciprocates changes in one rotation. As a result, the washing water in the inflow portion 84 is periodically pulsated, and as a change in the pulsation pressure, the minimum pressure during pulsation is substantially equal to the inflow pressure of the pump, and the maximum pulsation pressure is the load of the pump. The pressure corresponds to the rate of change in the volume of the pump and is discharged from the outflow portion 85.

  In the positive displacement pump 14, when the pressure at the inflow portion 84 increases, the load on the pump decreases, the minimum pulsation pressure increases, and the maximum pulsation pressure is almost constant, so the pulsation width It is possible to control to a state where there is almost no pulsation depending on conditions. Therefore, the pressure at the inflow portion 84 has a characteristic that when the flow rate is increased due to the characteristic of the fixed orifice 9, the pressure at the inflow portion 84 is decreased, and when the flow rate is decreased, the pressure of the inflow portion pressure 84 is increased. By controlling the flow rate, the pressure of the inflow portion 84 can be increased when the flow rate is low to reduce the pulsation, and the pressure of the inflow portion 84 can be decreased to increase the pulsation when the flow rate is high.

  Accordingly, when the set flow rate is small, the pressure at the inlet of the positive displacement pump 14 is large and pulsation is eliminated, so that a gentler feeling of cleaning is realized. Conversely, when the set flow rate is large, the positive displacement pump 14 By controlling the pulsation with a small pressure at the inlet, it is possible to realize a firm cleaning with a sense of stimulation and provide a wider cleaning feeling to the user.

  As described above, the pulsation generating means is the positive displacement pump 14 capable of supplying the washing water having a volume corresponding to the driving amount of the pressure feeding piston 83, and thereby the rotational speed of the motor 86 is variably controlled, and particularly the flow rate control. The flow rate can be controlled without providing a valve. For example, when the number of rotations of the motor 86 is set to low speed, the flow rate of the cleaning water supplied to the human body cleaning nozzle 30 is reduced, and the pressure amplitude of the pulsation is reduced, so that it can be cleaned with a gentle jet with little irritation. Further, when the rotational speed of the motor 86 is set to high speed, the flow rate of cleaning water supplied to the human body cleaning nozzle 30 is increased, and the pressure amplitude of the pulsation is increased, so that it can be cleaned with a strong jet with a feeling of irritation.

  In other words, by using a positive displacement pump as the pulsation generating means, it is possible to control the flow rate discharged from the human body washing nozzle without the flow rate control valve, and the larger the set flow rate, the more the pulsation of the washing water discharged from the human body washing nozzle. The amplitude can be amplified.

  FIG. 8 shows the pressure fluctuation of the cleaning water discharged from the human body cleaning nozzle 30.

  The wash water supplied by the operation of the butt switch 303 or the bidet switch 304 is reduced to a substantially constant pressure by the pressure reducing valve 8 regardless of the incoming water pressure, and further reduced by the fixed orifice 9. Here, when the cleaning flow rate is set to the smallest (Lv1) by the water flow setting switches 307 and 308, the flow rate through the fixed orifice 9 is small and the pressure loss is small. It is discharged from the human body washing nozzle without function. Therefore, as shown in FIG. 8, since there is no amplitude of pressure fluctuation at the outlet of the positive displacement pump 14, the cleaning flow rate is small and there is no pulsation for the user, a gentler feeling of cleaning is given.

  On the contrary, as the cleaning flow rate is increased (Lv2 or more) by the water flow setting switches 307 and 308, the flow rate through the fixed orifice 9 increases and the pressure loss increases. Therefore, the pressure at the inlet of the positive displacement pump 14 decreases, and the positive displacement type The pump 14 is discharged from the human body washing nozzle by increasing the rotation speed in accordance with the washing flow rate. Therefore, as shown in FIG. 8, as the cleaning flow rate is increased, the amplitude of the pressure fluctuation at the outlet of the positive displacement pump 14 increases, and as the cleaning flow rate increases, the pulsation increases as the cleaning flow rate increases. A good feeling of washing can be obtained.

As described above, when the user sets the cleaning strength of Lv1 with a low cleaning flow rate by the water flow setting switches 307 and 308 as the flow rate setting means, the pulsation is eliminated, and a gentler feeling of cleaning is realized. As the setting flow rate is high and the cleaning flow level is high, such as Lv5 and Lv5, the pulsation is increased to realize a cleaning feeling with a sense of irritation, so that a wider range of users can be obtained. A feeling of cleaning can be provided.

  As described above, the first embodiment is a sanitary washing apparatus that supplies the human body with the cleaning water supplied from the water supply pipe 201 as a supply source, and the human body cleaning nozzle 30 that discharges the cleaning water and cleans the human body. The heat exchanger 12 that heats the cleaning water, the pre-flow path 202 that distributes the cleaning water from the supply source to the heat exchanger 12, and the heat exchanger that is provided between the heat exchanger 12 and the human body washing nozzle 30 12, a rear flow path 203 for flowing the washing water from the body 12 to the human body washing nozzle 30, a fixed orifice 9 provided in the front flow path 202, and a first branch connected to the upstream side of the fixed orifice 9 in the front flow path 202. The vacuum breaker 31, the second vacuum breaker 61 branched and connected to the rear flow path 203, and the heat exchanger 12 and the second vacuum breaker 61 in the rear flow path 203 cause pulsation in the washing water. Pulsation A displacement pump 14 is a means, a flow rate setting means 307 and 308 for setting the flow rate of the washing water discharged from the human body washing nozzle 30, but equipped with.

  The positive displacement pump 14 provided between the heat exchanger 12 and the second vacuum breaker 61 has a characteristic that the discharge flow rate fluctuates periodically, and the positive displacement pump 14 corresponds to the fluctuating flow rate. The outlet pressure, that is, the pressure in the outflow portion 85 changes and pulsation occurs. The minimum pressure at the time of pulsation of the outlet pressure of the positive displacement pump 14 is substantially equal to the inlet pressure of the positive displacement pump 14, that is, the pressure at the inflow portion 84, and the maximum pressure at the time of pulsation is controlled so that the flow rate becomes constant. In this case, since it does not change, the pulsation width becomes small. This operation is not limited to the positive displacement pump, and the same effect is obtained not only in other pulsation generating means such as means for generating pulsation by driving an electromagnetic pump.

  Thus, in the sanitary washing device of the first embodiment, the supplied wash water is flow-controlled based on the set flow set by the flow setting means 307 and 308 and is supplied to the positive displacement pump 14 which is a pulsation generating means. When the set flow rate is small, the inlet pressure of the positive displacement pump 14 is increased by the fixed orifice 9 provided in the front flow path 202, and when the set flow rate is large, the positive pressure of the wash water before the water is introduced is the positive displacement type. Since the inlet pressure of the pump 14 is low, the amplitude of pulsation is small during weak cleaning, and the amplitude of pulsation is large during strong cleaning.

  This is because the fixed orifice 9 provided in the front flow path 202 has a smaller pressure loss as the flow rate is smaller, and a larger pressure loss as the flow rate is larger. Therefore, when the set flow rate is small, the pressure loss at the fixed orifice 9 is small. This is because the pressure of the washing water supplied to the inlet of the mold pump 14 is high, and when the set flow rate is large, the pressure loss at the fixed orifice 9 is large, so the pressure of the washing water supplied to the inlet of the positive displacement pump 14 is low. is there.

  Furthermore, a first vacuum breaker 31 branched and connected to the front flow path 202 upstream of the heat exchanger 12 and a second vacuum breaker connected to the rear flow path 203 downstream of the heat exchanger 12 and branched. The breaker 61 prevents the backflow of sewage from the human body washing nozzle 30 and the toilet nozzle 40, and the washing water in the heat exchanger 12 is inadvertently washed away from the human body washing nozzle 30 and the toilet nozzle 40 and is blown away. Is prevented.

  As a result, when the set flow rate is small, the pulsation feeling is small, and a gentler washing feeling can be realized, and conversely, when the set flow rate is large, the pulsation feeling is large and a firm cleaning with a sense of stimulation can be realized, A wide range of cleaning feeling can be provided to the user, and the heat exchanger can be prevented from being blown.

Further, in the sanitary washing device of the first embodiment, the first vacuum breaker 31 flows out the washing water to the heat exchanger 12 through the inlet 71 through which the washing water flows from the front flow path 202 and the fixed orifice 9. And a vacuum breaker valve 77 provided in the branch pipe 204 on the inlet 71 side of the fixed orifice 9, and a primary side that is closer to the inlet 71 than the vacuum breaker valve 77 of the branch pipe 204. 6 and an intake port 74 provided on the secondary side of the vacuum breaker valve 77 of the branch pipe 204. The first vacuum breaker 31 is integrated with the fixed orifice 9 as shown in FIG. Is formed.

  In this configuration, the pressure loss at the fixed orifice 9 decreases as the flow rate decreases, and the pressure loss at the fixed orifice 9 increases as the flow rate increases. Therefore, the washing water at the outlet 72 after passing through the fixed orifice 9 is increased. The pressure after passing through the fixed orifice 9 increases as the flow rate decreases, and the pressure after passing through the fixed orifice 9 decreases as the flow rate increases.

  Further, the first vacuum breaker 31 takes in the outside air from the intake port 74 when the upstream flow path 202 on the upstream side becomes negative pressure and sewage is about to flow backward from the human body washing nozzle 30. It works to release the negative pressure and prevent the risk of sewage flowing backward.

  The fixed orifice 9 formed integrally with the first vacuum breaker 31 has a flow path at the fixed orifice 9 when the front flow path 202 becomes negative pressure and sewage is about to flow backward from the human body washing nozzle 30. By being reduced, it acts so that the flow rate which tries to flow backward is suppressed.

  This not only prevents the first vacuum breaker 31 from taking in the outside air and releases the negative pressure to prevent the backflow, but also when the sewage tries to backflow from the human body washing nozzle 30, the fixed orifice 9 causes the flow path to flow. Since it is a reduced configuration, by suppressing the amount of sewage flowing into the first vacuum breaker 31, it is possible to enhance the effect of preventing the risk of sewage flowing back.

  Further, since the first vacuum breaker 31 is formed integrally with the fixed orifice 9, the piping hose is not required and can be simplified, and it is not only compact and space-saving, but also the piping hose expands and contracts by internal pressure. Thus, the delay and malfunction of the vacuum breaker operation can be prevented, and the functions of the fixed orifice and the vacuum breaker can be ensured.

  Further, in the sanitary washing device of the first embodiment, the pulsation generating means is constituted by the positive displacement pump 14, and the supplied wash water is supplied at a pressure based on the flow rate set by the flow rate setting means 307 and 308. The pulsation can be generated by applying pressure by the positive displacement pump 14 which is a pulsation generating means.

  By using the positive displacement pump 14 as the pulsation generating means for generating the pulsation, when the positive pressure of the positive displacement pump 14, that is, the pressure at the inflow portion 84 becomes a certain level or more, the outlet pressure of the positive displacement pump 14, that is, the outflow portion 85. The minimum pressure at the time of pulsation is substantially equal to the inlet pressure of the positive displacement pump 14, and the maximum pressure at the time of pulsation of the outlet pressure of the positive displacement pump 14 does not change. When the pressure at the inlet 14 becomes a certain value or less, the pressure pulsation width increases, and by controlling the flow rate of the positive displacement pump 14, the inlet pressure of the positive displacement pump 14 also changes in conjunction with the pulsation width of the washing water. Changes.

Thus, by controlling the discharge flow rate of the positive displacement pump 14, the amplitude of pulsation can be controlled simultaneously. That is, the pulsation of the washing water generated by the positive displacement pump 14 which is a pulsation generating means has a high inlet pressure of the positive displacement pump when the set flow rate is small, and an inlet pressure of the positive displacement pump when the set flow rate is large. Therefore, the amplitude of pulsation is small during weak cleaning, and the amplitude of pulsation is large during strong cleaning. Therefore, if the set flow rate is low,
When the pressure at the positive displacement pump inlet on the downstream side of the incoming water pressure adjustment means is increased and the amplitude of pulsation is reduced, a gentler feeling of cleaning is realized. By reducing the pressure at the pump inlet and increasing the amplitude of pulsation, it is possible to realize a firm cleaning with a sense of irritation and a wider sense of cleaning for the user.

  In the sanitary washing device of the first embodiment, the rear flow path 203 includes a buffer tank 15, and the second vacuum breaker 61 is provided in the buffer tank 15. The buffer tank 15 is a heat exchanger 12. Acts as a temperature buffer for heated wash water.

  Thereby, it is possible to suppress the occurrence of uneven temperature of the cleaning water supplied to the human body cleaning nozzle 30, and the buffer tank 15 and the second vacuum breaker 61 can be provided integrally. Miniaturization is possible.

  In the sanitary washing device of the first embodiment, the pressure reducing valve 8 is provided on the upstream side of the first vacuum breaker 31 in the front flow path 202 and depressurizes the wash water supplied from the water supply pipe 201 as a supply source. This is a configuration provided.

  The pressure reducing valve 8 depressurizes the pressure of the cleaning water supplied from the water supply pipe 201 as a supply source, so that the water supply pressure supplied to the fixed orifice 9 arranged on the downstream side thereof is always substantially constant. Therefore, the weak pulsation is one of the operational effects of the sanitary washing device of the first embodiment, the amplitude of pulsation is small, the pulsation feeling is small, and a gentler washing feeling can be realized. Even when the supply water pressure of the supply source is different or fluctuates, it is possible to stably obtain an operational effect that can realize a firm cleaning with a large pulsation amplitude, a large pulsation feeling, and a stimulation sensation.

  In addition, since the water stop electromagnetic valve 7 is provided on the upstream side of the pressure reducing valve 8 in the front flow path 202 and switches the supply state of the cleaning water supplied from the water supply pipe 201 serving as a supply source, When the cleaning device is not used, the water stop solenoid valve 7 is closed, so that an unnecessary water pressure load does not act on the pressure reducing valve 8 and the heat exchanger 12 when the sanitary cleaning device is not used. Can be used safely for a long time.

  As described above, the sanitary washing apparatus according to the present invention has a less pulsating feeling when the set flow rate is small, and can realize a gentler washing feeling. Cleaning can be realized, providing a wide sense of cleaning to the user, and further preventing the heat exchanger from being blown, so that not only the hot water cleaning toilet seat, but also sanitary cleaning devices such as the face, head, hands and feet, Or it is applicable also to the use of washing | cleaning other than animals, such as animals, or a living thing.

7 Water stop solenoid valve 8 Pressure reducing valve 9 Fixed orifice 12 Heat exchanger 14 Positive displacement pump (pulsation generating means)
DESCRIPTION OF SYMBOLS 15 Buffer tank 30 Human body washing nozzle 31 1st vacuum breaker 61 2nd vacuum breaker 71 Inflow port 72 Outflow port 73 Outlet port 74 Inlet port 77 Vacuum breaker valve 202 Piping (front flow path)
203 Piping (rear flow path)
204 Branch pipe 205 Branch pipe 307, 308 Water setting switch (flow rate setting means)

Claims (6)

A sanitary washing device that supplies the human body with wash water supplied from a supply source,
A human body cleaning nozzle that discharges cleaning water to clean the human body;
A heat exchanger for heating the wash water;
A pre-flow path that is provided between the supply source and the heat exchanger and distributes wash water from the supply source to the heat exchanger;
A post-flow path that is provided between the heat exchanger and the human body washing nozzle and distributes washing water from the heat exchanger to the human body washing nozzle;
A fixed orifice provided in the front channel;
A first vacuum breaker branch connected to the upstream side of the fixed orifice of the front flow path;
A second vacuum breaker branched and connected to the rear flow path;
Pulsation generating means between the heat exchanger in the rear flow path and the second vacuum breaker for causing pulsation in the washing water;
Flow rate setting means for setting a flow rate of cleaning water discharged from the human body cleaning nozzle;
Sanitary washing device equipped with. The first vacuum breaker is:
An inlet through which washing water flows from the front channel;
An outlet through which wash water flows out to the heat exchanger via the fixed orifice;
A vacuum breaker valve provided in a branch pipe on the inlet side of the fixed orifice;
A discharge port provided on the primary side which is the inlet side of the vacuum breaker valve of the branch pipe;
An intake port provided on the secondary side of the vacuum breaker valve of the branch pipe;
The sanitary washing device according to claim 1, wherein the first vacuum breaker is formed integrally with the fixed orifice. The sanitary washing device according to claim 1 or 2, wherein the pulsation generating means is a positive displacement pump. A buffer tank provided in the rear flow path;
The sanitary washing device according to any one of claims 1 to 3, wherein the second vacuum breaker is provided in the buffer tank. The sanitary washing according to any one of claims 1 to 4, further comprising a pressure reducing valve that is provided upstream of the first vacuum breaker in the front channel and depressurizes wash water supplied from the supply source. apparatus. The sanitary washing device according to claim 5, further comprising a water stop solenoid valve that is provided upstream of the pressure reducing valve in the front flow path and switches a supply state of the wash water supplied from the supply source.