Toilet device

Abstract

A toilet device has a bowl portion and a cleaning mechanism that supplies cleaning water for toilet cleaning to the bowl portion at a flow rate of 1.5 [m / s] or more. The cleaning mechanism has a discharge portion that discharges the cleaning water to the bowl portion, and the bowl portion has a bowl surface portion that is disposed above a water surface of the bowl portion and below the discharge portion. The toilet device can be configured so that the flow rate [m / s] of the cleaning water in the bowl surface portion is 1.5 or more.

Description

Technical Field

[0001] This disclosure relates to a toilet device. Background Technology

[0002] Patent Document 1 discloses a toilet device having a toilet bowl section and a cleaning mechanism for supplying cleaning water to the toilet bowl section for cleaning the toilet. In order to improve the ability to remove dirt, the toilet device is provided with a swirling passage section in the toilet bowl section to swirl the cleaning water and to flush away dirt with the force of air flowing in the swirling passage section.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2007-308912 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] The inventors of this application have studied the conditions for achieving good dirt removal capabilities. As a result, they have found that optimizing the flow rate of the washing water is effective in achieving good dirt removal capabilities. No technique has yet been proposed that focuses on the relationship between the flow rate of the washing water and dirt removal capabilities.

[0008] One of the purposes of this disclosure is to provide a toilet device that can achieve good soil removal capabilities.

[0009] Technical solutions for solving the problem

[0010] The toilet device disclosed herein includes a toilet bowl section and a cleaning mechanism for supplying cleaning water for cleaning the toilet bowl section at a flow rate [m / s] of 1.5 or higher. Attached Figure Description

[0011] Figure 1 This is a structural diagram illustrating the implementation of a toilet device.

[0012] Figure 2 This is a side sectional view showing a portion of the toilet device according to an embodiment.

[0013] Figure 3 This is a top view showing a portion of the toilet device according to an embodiment.

[0014] Figure 4 yes Figure 3 AA sectional view.

[0015] Figure 5 It means Figure 3 A top view of a portion of the toilet.

[0016] Figure 6 This is a side sectional view of the test piece in the embodiment.

[0017] Figure 7 It is a graph showing the relationship between the flow rate of the cleaning water and the dirt removal rate when the machine is in a dry state.

[0018] Figure 8 It is a graph showing the relationship between the flow rate of the cleaning water and the dirt removal rate when the water is wet. Detailed Implementation

[0019] The following describes the implementation method. Identical components are labeled with the same symbols, and repeated descriptions are omitted. In the accompanying drawings, components are appropriately omitted, enlarged, or reduced for ease of explanation. The drawings are views viewed in the direction indicated by the symbols.

[0020] Reference Figure 1 The toilet device 10 mainly includes a toilet bowl 12, a cleaning mechanism 16 that supplies cleaning water to the toilet bowl portion 14 of the toilet bowl 12 for cleaning the toilet bowl, and a control unit 18 that controls the cleaning mechanism 16. In addition, the toilet device 10 also includes, for example, a housing (not shown) mounted on the toilet bowl 12, and a toilet seat and lid (not shown) that are closable and mounted on the toilet bowl 12. The housing houses several devices, such as a hygiene cleaning device for cleaning the body parts of the person sitting on the toilet.

[0021] The cleaning mechanism 16 has a main mechanism 20 for performing toilet cleaning and a secondary mechanism 22 for performing a pre-cleaning action. Toilet cleaning refers to the action of supplying cleaning water into the toilet bowl 14 after the user defecates, thereby removing waste from the toilet bowl 14. The pre-cleaning action refers to the action of supplying liquid to moisten the inside of the toilet bowl 14 before the user defecates. By performing the pre-cleaning action before the user defecates, the waste removal performance during toilet cleaning can be improved.

[0022] The main unit 20 has at least one discharge section 24A, 24B that discharges cleaning water into the toilet bowl 14, a water supply line 28 that serves as a channel for water supplied from the water source 26 to the discharge section 24A, 24B, and a first on / off valve 30 that can open and close the water supply line 28.

[0023] In this embodiment, the discharge sections 24A and 24B are provided on the nozzle, which is separate from the toilet bowl 12. Alternatively, the discharge sections 24A and 24B can be integrally provided on the toilet bowl 12 as part of it. The water source 26 is, for example, a water supply system or a water tank. The water supply circuit 28 has a common water circuit 28a equipped with a first on / off valve 30 and multiple branch water circuits 28b branching from the common water circuit 28a and communicating with the individual discharge sections 24A and 24B. The first on / off valve 30 is an electrically driven valve such as a solenoid valve or an electric valve.

[0024] The auxiliary mechanism 22 has an auxiliary discharge section 32 that discharges liquid used for pre-cleaning into the toilet bowl section 14, a liquid supply line 36 that serves as a channel for supplying liquid from the liquid source 34 to the auxiliary discharge section 32, and a second on / off valve 38 that can open and close the liquid supply line 36.

[0025] In this embodiment, the secondary discharge section 32 is provided on the nozzle, which is separate from the toilet bowl 12. Alternatively, the secondary discharge section 32 can also be integrally provided on the toilet bowl 12 as part of it. The liquid source 34 can be shared with the water source 26 or be separate. In this embodiment, the liquid used for the pre-cleaning action is cleaning water. In addition, the liquid can also be detergent, antibacterial water, etc. The second on / off valve 38 is also an electrically driven valve, just like the first on / off valve 30.

[0026] The control unit 18 is a computer composed of a CPU, ROM, and RAM. The components of the cleaning mechanism 16 that are separate from the toilet bowl 12 (e.g., the on / off valves 30 and 38, the nozzles that constitute the discharge sections 24A and 24B, etc.) are mounted on the aforementioned housing.

[0027] Under the control of the control unit 18, the cleaning mechanism 16 can perform toilet cleaning when predetermined toilet cleaning conditions are met. Toilet cleaning conditions include, for example, a toilet cleaning command received by the control unit 18 from an operating terminal such as a controller or portable terminal. Toilet cleaning is performed by the control unit 18 maintaining the first on / off valve 30 in an open state to discharge cleaning water from the discharge units 24A and 24B for a predetermined period of time.

[0028] Under the control of the control unit 18, the cleaning mechanism 16 can perform a pre-cleaning operation when predetermined pre-cleaning conditions are met. Pre-cleaning conditions may include, for example, conditions determined by sensors detecting predetermined pre-defecation actions performed by the user before defecation. Pre-defecation actions may include, for example, sitting on the toilet seat. Sensors may include, for example, photoelectric sensors, touch sensors, pressure sensors, and human sensors. The pre-cleaning operation is performed by keeping the second on / off valve 38 open to discharge cleaning water from the secondary discharge unit 32 for a predetermined period of time.

[0029] Reference Figures 2-4 The following explanation uses three mutually orthogonal directions: X (front-back), Y (left-right), and Z (up-down). X and Y are horizontal directions, corresponding to the front, back, left, and right sides of a person sitting in a normal posture on the toilet seat. Z is the vertical direction.

[0030] The toilet 12 has a bowl portion 14 and an upper surface 40 with an opening at the upper end of the bowl portion 14. The bowl portion 14 has a basin surface 42 for receiving waste and a recess 44. The basin surface 42 is a bowl-shaped component that opens upwards. The recess 44 is provided below the basin surface 42 and is a component that is recessed downwards relative to the basin surface 42. In this embodiment, the basin surface 42 and the recess 44 are integrally provided as part of the same component. Alternatively, they can be provided separately. The upper surface 40 has a receiving recess 46 located at the rear of the bowl portion 14. The receiving recess 46 is recessed downwards from the peripheral portion 40a of the upper surface 40 located at the periphery of the receiving recess 46. Some components of the cleaning mechanism 16 (discharge portions 24A, 24B, etc.) are accommodated in the receiving recess 46.

[0031] The toilet device 10 has a drain pipe 48 connected to the bottom of the toilet bowl 14. The inlet 48a of the drain pipe 48 opens into the recess 44 of the toilet bowl 14. In this embodiment, the drain pipe 48 includes a toilet drain passage 50 that is part of the toilet 12 and a drain plug 52 connected to the toilet drain passage 50. The drain pipe 48 is connected to a drain pipe (not shown) installed in the building. The drain pipe 48 serves as a passage for waste discharged from the toilet bowl 14 to the drain pipe. The drain pipe 48 includes a water trap or similar water trap 56 for storing water 54 in the toilet bowl 14. A portion of the water 54 becomes accumulated water 58 in the toilet bowl 14. Hereinafter, the surface of the accumulated water 58 in a static state, that is, the surface of the accumulated water 58 at the highest water level that can be accumulated in the toilet bowl 14, will be referred to as the accumulated water surface 60.

[0032] The toilet bowl section 14 has a first basin surface 62 and a second basin surface 64. The first basin surface 62 is positioned above the water accumulation surface 60 and below the discharge sections 24A and 24B. The second basin surface 64 is positioned below the water accumulation surface 60 and above the recess 44. Here, "below the discharge sections 24A and 24B" means that, in the case of multiple discharge sections 24A and 24B, it only needs to be below the lowest position of the outlet 24a of the lowest-positioned discharge section 24A or 24B. The outlet 24a refers to the part of the discharge section 24A or 24B from which cleaning water is discharged. In this embodiment, among the first discharge section 24A and the second discharge section 24B described later, the outlet 24a of the second discharge section 24B is located at the lowest position. Therefore, the first basin surface 62 is positioned below the lowest position of the outlet 24a of the second discharge section 24B. The first basin surface 62 serves as the water passage for the cleaning water discharged from the discharge sections 24A and 24B. In the figures, the upper edge 62a of the first basin surface 62 is schematically indicated by a single-dotted line. The "drainage section" of this first basin surface 62 is defined as excluding the jet nozzles that discharge a stream of water into the drain pipe 48 to facilitate the removal of waste. These jet nozzles are formed at the bottom of the toilet bowl portion 14 or on the drain pipe 48. The "drainage section" can also be understood as the discharge of cleaning water from the upper part of the toilet bowl portion 14.

[0033] The first basin surface 62 has a continuous sliding surface 66 extending upwards from the water surface 60. The sliding surface 66 is smoothly continuous in the vertical direction without forming an inwardly protruding convex or curved surface. In this embodiment, the sliding surface 66 is provided throughout the entire vertical Z region of the first basin surface 62. Here, "convex or curved surface" refers to, for example, the portion connecting the shelf portion and the sliding surface 66 when a shelf portion is provided on the outer peripheral side of the basin surface 42. This shelf portion has a gentler slope than the upper end of the sliding surface 66.

[0034] Reference Figure 5Here, it is assumed that the maximum front-to-back dimension Ax related to the inner surface of the toilet bowl 14 is divided into four equal parts by lines La1 to La3, and the maximum left-to-right dimension Ay of the toilet bowl 12 is divided into two equal parts by lines Lb. The toilet bowl 14 includes: a front region 68 located in front of the toilet bowl 14 when viewed from above, a rear region 70 located behind the toilet bowl 14, and a pair of side regions 72 and 74 located between the front region 68 and the rear region 70. The front region 68 is the region located in front of the front four-part line La1. The rear region 70 is the region located behind the rear four-part line La3. The pair of side regions 72 and 74 are the regions between the front and rear four-part lines, and are the regions on the left and right sides relative to the left and right center lines Lb. The pair of side regions 72 and 74 include a right region 72 located to the right of the left-to-right direction Y and a left region 74 located to the left of the left-to-right direction Y. Furthermore, the toilet bowl 14 has a front half 80 constituting its front half and a rear half 82 constituting its rear half. The front half 80 is located in front of the quartering line La2 on the central side of the toilet bowl 14, and the rear half 82 is located behind the quartering line La2. The quartering line La2 can be understood as the front-rear center line that divides the maximum front-rear dimension Ax of the toilet bowl 14 into two equal parts.

[0035] Reference Figures 2-5 At least one discharge section 24A, 24B includes a first discharge section 24A and a second discharge section 24B. Discharge sections 24A and 24B are schematically shown in the figures. Figures 2-4 Arrows are marked with the flow direction associated with a portion of the cleaning water discharged from discharge sections 24A and 24B. Figure 5 In this embodiment, arrows are used to indicate the flow direction of the water flow formed by the cleaning water discharged from the discharge sections 24A and 24B. The first discharge section 24A discharges cleaning water into the right side region 72 of the toilet bowl section 14, thereby forming a swirling water flow 76 within the toilet bowl section 14. The cleaning mechanism 16 forms the swirling water flow 76 by supplying cleaning water into the toilet bowl section 14. The swirling water flow 76 refers to water flowing circumferentially over at least a portion of the circumferential area within the toilet bowl section 14. The swirling water flow 76 does not necessarily flow over the entire circumferential area within the toilet bowl section 14. For example, the swirling water flow 76 may flow over a circumferential area of ​​more than half a circumference within the toilet bowl section 14. In this embodiment, the swirling water flow 76 can flow within the toilet bowl section 14 sequentially through the right side region 72, the front region 68, and the left side region 74. The second discharge section 24B discharges a wide stream of cleaning water downwards in the rear region 70 of the toilet bowl section 14, forming a downward-flowing water stream 78 in that rear region 70. Through these water streams 76 and 78, the toilet bowl is cleaned by washing away the waste in the toilet bowl section 14 and then discharging the waste through the drain pipe 48.

[0036] The secondary discharge section 32 supplies liquid to the toilet bowl section 14 to moisten the first basin surface 62 of the toilet bowl section 14. The method of supplying the liquid to the secondary discharge section 32 is not particularly limited. For example, the secondary discharge section 32 may also supply liquid to the toilet bowl section 14 by spraying a mist of liquid. Figure 2 The value Sa represents the liquid spray range based on the secondary discharge section 32.

[0037] The cleaning mechanism 16 supplies cleaning water to the toilet bowl section 14 with a flow rate [m / s] of 1.5 or higher, which is related to the ability to remove dirt. This flow rate is sufficient as long as it is met in the cleaning water immediately after discharge from the drain sections 24A and 24B. The toilet device 10 is preferably configured such that the flow rate of the cleaning water in the first basin surface 62 of the toilet bowl section 14 is 1.5 or higher. The flow rate of the cleaning water is generally 0.6 to 1.2, and a flow rate higher than that is used as a condition. As a result, as described later, good dirt removal ability can be obtained. The flow rate of the cleaning water described here can be measured, for example, using a flow meter. In addition, as a general measurement method, the PIV method (Particle Image Velocimetry) can also be used. The PIV method is a method of inserting a marker called a tracer into the flow field and calculating the velocity of the flow field based on the amount of movement of the moving marker. According to the PIV method, the marker and the cleaning water can flow together, and the moving speed of the marker is measured using a camera or the like.

[0038] Preferably, the toilet device 10 can be configured such that, when the first basin surface 62 is in a dry state, the flow rate of the cleaning water in the first basin surface 62 is 2.0 or higher. Here, "dry state" means that the first basin surface 62 is dry and not wet. Therefore, as will be described later, a particularly good dirt removal ability can be obtained compared to the case where the flow rate of the cleaning water is 1.5 or lower. The toilet device 10 can obviously also be configured such that the flow rate of the cleaning water in the first basin surface 62 in the dry state is 1.5 or higher.

[0039] A dry state is achieved, for example, when no water droplets adhere to the first basin surface 62. This dry state can also be achieved, for example, by blowing air onto the first basin surface 62 until it can be confirmed that no water droplets adhere to it. This can be achieved using either the actual toilet 12 or a sample.

[0040] Preferably, the toilet bowl assembly 10 can be configured such that, when the first basin surface 62 is in a wet state, the flow rate of the cleaning water in the first basin surface 62 is 1.5 or more, more preferably 2.0 or more. Here, "wet state" refers to the first basin surface 62 being wet due to a pre-washing action or the like. Therefore, as will be described later, compared to the case where the cleaning water flows at a flow rate of 1.5 or less in the first basin surface 62 when it is dry, a particularly good dirt removal ability can be obtained. From the viewpoint of maintaining the first basin surface 62 in a wet state for a long time, the toilet bowl portion 14 of the toilet bowl 12 is preferably made of a hydrophilic material.

[0041] The state of wetness is achieved, for example, when the entire surface of the first basin face 62 has just been wetted, and the first basin face 62 is at least partially wetted. "Just after the entire surface of the first basin face 62 has been wetted" means, for example, exactly 30 seconds to 1 minute after the entire surface of the first basin face 62 has been wetted. This state of wetness can be achieved, for example, by using a wash bottle to wet the entire surface of the first basin face 62. Alternatively, the state of wetness can be achieved by spraying the entire surface of the first basin face 62 or by soaking the toilet bowl 12. Either method can be used with a physical or sample toilet bowl 12.

[0042] There is no specific upper limit to the flow rate of the cleaning water. For example, under the condition that the flow rate is in the range of 50 to 100 [L / min], the upper limit can be 10.0.

[0043] The preferred location for meeting the conditions related to the flow rate of the cleaning water (hereinafter referred to as the flow rate condition) will be explained. First, the circumferential position of the toilet bowl 14 where the cleaning conditions are desired will be explained.

[0044] Preferably, the flow rate condition can be satisfied in the first basin surface 62 and the rear half 82 where feces easily adhere as dirt. This allows for the effective removal of feces that easily adhere to the rear half 82. Due to this effect, the flow rate condition can also be satisfied behind the recess 44 and in the first basin surface 62.

[0045] Preferably, the flow rate condition can be satisfied in the first basin surface 62 and the front half 80 where urine easily adheres as dirt. This allows for effective removal of urine that easily adheres to the front half 80. Due to this effect, the flow rate condition is preferably satisfied in front of the recess 44 and in the first basin surface 62.

[0046] The flow velocity condition can be satisfied at at least two of the following: front region 68, rear region 70, right region 72, and left region 74, and the first basin surface 62 must meet this condition. These two locations could be, for example, a combination of front region 68 and rear region 70, or a combination of right region 72 and left region 74. Alternatively, the flow velocity condition can also be satisfied at two consecutive locations along the cyclic direction Da described below, and the first basin surface 62 must meet this condition. This allows for effective removal of contaminants over a wide area.

[0047] The flow velocity conditions can also be met in the four regions 68, 70, 72, and 74 mentioned above.

[0048] The flow velocity condition can be satisfied in two or more regions located along the flow path of the swirling water flow 76 in regions 68, 70, 72, and 74, i.e., in two or more consecutive regions along the swirling direction Da of the swirling water flow 76. For example, it can be satisfied in the right-hand region 72 and the forward region 68, which are consecutive along the swirling direction Da, or it can be satisfied in the forward region 68 and the left-hand region 74. More preferably, the flow velocity condition can be satisfied in three or more consecutive regions along the swirling direction Da among these four regions. Furthermore, the flow velocity condition can also be satisfied in all four regions.

[0049] Regarding the circumferential position-related conditions described above, it is sufficient that the flow velocity condition is met in at least a portion of regions 68, 70, 72, and 74, rather than in the entire region. Here, "a portion" can be, for example, more than 70% of each of regions 68, 70, 72, and 74. Furthermore, "a portion" can also be a portion of regions 68, 70, 72, and 74 where contaminants are difficult to remove. In addition, the flow velocity condition can also be met in more than 70% of the entire region 68, 70, 72, and 74.

[0050] Preferably, the flow velocity condition can be satisfied within a range of more than half a circumference of the circumference of the toilet bowl 14. More preferably, the flow velocity condition can be satisfied within a full circumference. Here, circumference refers to the intersection point Ca of the four-part line La2 on the central side of the toilet bowl 14 and the left and right center lines Lb (refer to...). Figure 5 The circumferential direction of the circle centered at ).

[0051] Furthermore, the flow rate of the cleaning water in the rear half 82 of the toilet bowl section 14 can be made faster than the flow rate of the cleaning water in the front half 80. This condition is based on the premise that the flow rate of the cleaning water in the rear half 82 is 1.5 or higher. Based on satisfying this condition, the flow rate of the cleaning water in the front half 80 can be 1.5 or higher, or it can be less than 1.5. Thus, the flow rate in the rear half 82, where difficult-to-remove feces tend to adhere, is increased, while the flow rate in the front half 80, where easy-to-remove urine tends to adhere, is decreased. That is, compared to the case where the flow rate of the cleaning water in the front half 80 is faster than the flow rate of the cleaning water in the rear half 82, the actual flow rate in the front half 80, relative to the flow rate required for removing dirt, does not need to be too high. Furthermore, the performance required by the cleaning mechanism 16 to obtain the desired dirt removal performance can be mitigated. Alternatively, the flow rate of the cleaning water in the rear half 82 of the toilet bowl 14 can be lower than the flow rate of the cleaning water in the front half 80.

[0052] Next, the vertical position of the toilet bowl portion 14 where the flow rate condition is desired will be explained. Preferably, the flow rate condition is satisfied within the vertical range of the first basin surface 62 of the toilet bowl portion 14, including its sliding surface 66. Specifically, if the basin surface 42 does not have a shelf portion, the flow rate condition only needs to be satisfied by the sliding surface 66 of the first basin surface 62; if the basin surface 42 has a shelf portion, the flow rate only needs to be satisfied by both the partition portion and the sliding surface 66 of the first basin surface 62. When the basin surface 42 has a shelf portion, the flow rate of the washing water in the sliding surface 66 located below the shelf portion tends to decrease, making it difficult to remove dirt. Therefore, by satisfying the above-mentioned flow rate condition within the range including the sliding surface 66, dirt within a large vertical range of the first basin surface 62 can be effectively removed.

[0053] Regarding the flow velocity condition being satisfied in the first basin surface 62 of the toilet bowl section 14, it can be satisfied at least in the central portion of the first basin surface 62 in the vertical direction. Furthermore, it can be satisfied at multiple locations in the vertical direction of the first basin surface 62, or even across the entire vertical direction of the first basin surface 62. Additionally, the flow velocity condition can also be satisfied in the second basin surface 64, which is located below the accumulated water surface 60.

[0054] Regarding satisfying the flow rate condition at the target location, it is sufficient to adjust either (1) the shape of the toilet bowl 14 or (2) the structure of the cleaning mechanism 16. In short, the toilet device 10 can be configured in such a way that the flow rate condition is satisfied at the target location.

[0055] First, the preferred shape of the toilet bowl portion 14 will be explained in relation to flow rate conditions. In the toilet bowl portion 14, if there is a section in the water flow path where the curvature changes abruptly, such as a convex curved surface, the flow rate decreases there. Therefore, as in this embodiment, the entire vertical region of the first basin surface 62 of the toilet bowl portion 14 can be formed by a sliding surface 66 without a convex curved surface. This makes it easier to satisfy the flow rate conditions of the cleaning water at the target location.

[0056] Furthermore, when the first basin surface 62 of the toilet bowl section 14 is shaped with a shelf section, the radius of curvature of the convex curved surface connecting the shelf section and the sliding surface 66 can be increased. The larger the radius of curvature, the better it is prevented from causing a sharp decrease in flow velocity on the convex curved surface, and the easier it is to meet the flow velocity conditions of the cleaning water in the target area.

[0057] Next, the preferred structure of the cleaning mechanism 16 will be explained in relation to the flow rate conditions. Regarding satisfying the flow rate conditions of the cleaning water at the target location, it is preferable to increase the number of discharge sections 24A and 24B as the target area expands. In this embodiment, two discharge sections 24A and 24B are used. Three or more discharge sections 24A and 24B may also be used.

[0058] In addition, the larger the target area, the greater the flow rate of the cleaning water discharged from the discharge section 24A, 24B, or the larger the range of the cleaning water discharged from the discharge section 24A, 24B.

[0059] The flow velocity v of the cleaning water can be expressed by the volumetric flow rate Q of the cleaning water passing through the outlet 24a of the discharge sections 24A and 24B and the cross-sectional area A of the section orthogonal to the axial direction of the outlet 24a, using the following formula (1). From formula (1), it can be seen that to increase the flow velocity v of the cleaning water passing through the outlet 24a, decreasing the cross-sectional area A of the outlet 24a or increasing the volumetric flow rate Q of the cleaning water supplied to the discharge section is effective. To increase the volumetric flow rate Q of the cleaning water, it is effective to install a pressurizing mechanism such as an accumulator or pump on the water supply line 28, and to supply the pressurized cleaning water through the water supply line 28.

[0060] v=Q / A…(1)

[0061] Furthermore, when using nozzles as discharge sections 24A and 24B, it is preferable to minimize the distance from when the cleaning water leaves the nozzle to when it reaches the toilet bowl section 14 of the toilet bowl 12. Additionally, it is preferable to make the axial direction of the nozzle outlet 24a as close as possible to the tangential direction of the cleaning water at the point where it reaches the toilet bowl section 14. This reduces the impact of the cleaning water reaching the toilet bowl section 14 and prevents a decrease in the flow rate of the cleaning water.

[0062] Next, the preferred type of water flow that satisfies the above flow velocity conditions will be explained. The flow velocity conditions are preferably satisfied by the swirling water flow 76 formed within the toilet bowl section 14. In this embodiment, the flow velocity conditions are preferably satisfied by the swirling water flow 76 in the side regions 72, 74, and the front region 68. Therefore, compared to the case where only the downward flow 78 is formed throughout the entire area of ​​the toilet bowl section 14, it is possible to easily form a water flow with a velocity of 1.5 or higher over a large area of ​​the toilet bowl section 14 while reducing the number of discharge sections 24A, 24B.

[0063] Furthermore, the above-mentioned flow velocity conditions can also be satisfied by the outflow of water 78 formed within the toilet bowl section 14. In this embodiment, it is preferable that the outflow of water 78 through the rear region 70 satisfies the flow velocity conditions.

[0064] Example

[0065] Next, the experiment conducted to determine the relationship between the above flow rate conditions and the dirt removal capacity will be described. In this experiment, [the following was done]: Figure 6 The test piece 90 shown has a flat plate with a suspected fecal matter 92 adhering to its surface. The suspected fecal matter 92 is removed by flowing cleaning water 94 over the test piece 90. The test was conducted with the flow rate of the cleaning water in contact with the suspected fecal matter 92 on the test piece 90 varying to 0.8, 1.5, 2.0, and 3.0.

[0066] In the academic field of intestinal environment systems, it is known that stool is classified into various types according to the so-called Bristol scale. These types of stool are (1) pellet stool (type 1), (2) hard stool (type 2), (3) slightly hard stool (type 3), (4) normal stool (type 4), (5) slightly soft stool (type 5), (6) muddy stool (type 6), and (7) watery stool (type 7). Here, the smaller the number used for classification, the lower the water content of the stool, the harder the stool, and therefore the more difficult it is to remove waste with washing water. That is, pellet stool of type 1 is the most difficult to remove waste with washing water. In this experiment, in order to evaluate the waste removal ability under the most stringent waste conditions, a suspected waste 92 with the component ratio of pellet stool was used. Here, a suspected waste 92 with the component ratio of pellet stool was prepared. The suspected waste 92 is composed of various components equivalent to water, food residue, intestinal bacteria, intestinal substances, etc. The suspected waste 92 contains a specified amount of these components, similar to the characteristics of actual feces. In this experiment, in order to resemble the characteristics of pellet-like stool, the moisture content of the suspected waste 92 was set to 53%.

[0067] To allow the suspected feces 92 to adhere to the test piece 90, the suspected feces 92 is allowed to fall freely from a distance spaced above the test piece 90, and a specified maximum impact load [g] is applied when it adheres to the test piece 90. This test is conducted under a first load condition of 300g and a second load condition of 1200g. The first load condition assumes the impact load when feces adhere to the toilet bowl 14 when a user with normal abdominal pressure defecates in a sitting position on the toilet seat. The second load condition assumes the impact load when a user with high abdominal pressure defecates under the same conditions.

[0068] The test was conducted under conditions where the panel surface was in both a wet and a dry state. The wet state was achieved by spraying water onto the test piece 90 with a sprayer. The dry state was achieved by wiping the moisture off the test piece 90 with a cloth and then blowing warm air with a hair dryer until the moisture was removed.

[0069] The following other conditions are irrelevant to the other conditions and are all the same.

[0070] • Time from the adhering of suspected contaminant 92 to the flow of cleaning water on test piece 90: 1 min

[0071] • Drainage time for flushing water: 2.2 seconds

[0072] • Thickness of cleaning water 94 when encountering suspected contaminant 92: 2.0 mm

[0073] Temperature: 25°C

[0074] Humidity: 70%

[0075] • Material of test piece 90: pottery

[0076] In this experiment, to evaluate the dirt removal capability, the dirt removal rate was calculated as expressed by the following formula (2). Mass ma [g] refers to the mass of the suspected dirt 92 located on the test piece 90 before the washing water flow, which is 1.0 g in this case. Mass mb [g] refers to the mass of the suspected dirt 92 remaining on the test piece 90 after the washing water flow. The dirt removal rate is expressed as a percentage, representing the proportion of the mass of the suspected dirt removed by the washing water flow to the mass of the suspected dirt before the washing water flow. When evaluating the dirt removal capability, the average value of the measurements related to the dirt removal rate obtained from five experiments conducted under the same test conditions was used as the evaluation object.

[0077] Dirt removal rate = {1 - (mb / ma)} × 100···(2)

[0078] The above experimental results are explained. (Refer to...) Figure 7 When in a dry state, a flow rate of 1.5 or higher allows for better dirt removal under strict dirt conditions (e.g., a removal rate of 20% or higher) compared to a flow rate of approximately 0.8 for the cleaning water. Furthermore, a flow rate of 1.5 or higher allows for a greater increase in dirt removal capacity with increasing flow rate compared to a flow rate of 0.8 or higher but less than 1.5.

[0079] When in a dry state, a flow rate of 2.0 or higher allows for particularly good dirt removal capabilities (e.g., a removal rate of 60% or higher) under stringent dirt conditions, compared to a flow rate of around 0.8 for the washing water. Furthermore, in a dry state, the tendency of dirt removal capability to change is observed around a flow rate of 2.0. When the flow rate is less than 2.0, the dirt removal capability decreases significantly. However, a flow rate of 2.0 or higher provides a stable dirt removal capability (e.g., a removal rate of 60% or higher).

[0080] Reference Figure 8 When wet, with a flow rate of 1.5 or higher, compared to a washing water flow rate of around 0.8, it is possible to achieve good dirt removal performance (e.g., a removal rate of 70% or higher) under strict dirt conditions. When wet, with a flow rate of 2.0 or higher, even better dirt removal performance (e.g., a removal rate of 80% or higher) can be achieved under strict dirt conditions. Furthermore, as... Figure 7 , Figure 8 As shown, when the flow rate of the cleaning water is around 0.8, the level of dirt removal capability is the same in both the wet and dry states (e.g., less than 20% in terms of removal rate). However, in the wet state, at a flow rate of around 1.5, the increase in dirt removal capability with increasing flow rate is significantly greater compared to the dry state. Furthermore, when in the wet state, by maintaining a flow rate of 1.5 or higher, a particularly good dirt removal capability can be obtained compared to the dry state.

[0081] Furthermore, when the environment is wet, the tendency of the dirt removal capacity to change drastically can be observed around a flow rate of 1.5 to 2.0. If the flow rate is less than 1.5, the dirt removal capacity decreases sharply, but if it is above the range of 1.5 to 2.0, a stable dirt removal capacity (e.g., a removal rate of 70% or more) can be obtained.

[0082] In addition, whether in a wet or dry state, by maintaining a flow rate of 1.5 or higher, compared to a typical flow rate (around 0.8), a good ability to remove dirt can be achieved. By discharging cleaning water that meets these conditions from the discharge sections 24A and 24B, the flow rate of the cleaning water flowing within the toilet bowl section 14 can be stabilized at 1.5 or higher, effectively removing dirt adhering to the toilet bowl section 14.

[0083] Other variations of each constituent element will be explained.

[0084] As in the embodiment, the toilet 12 may or may not have a spray hole.

[0085] The cleaning mechanism 16 only needs to have a main mechanism 20 for performing toilet cleaning; a secondary mechanism 22 for performing pre-cleaning is not necessary. Furthermore, the main mechanism 20 can also serve as the secondary mechanism 22. This assumes that the pre-cleaning action is performed by discharging liquid into the toilet bowl 14 to form either a swirling water flow 76 or a flowing water flow 78. It can be said that at least one discharge section 24A, 24B can also serve as a secondary discharge section 32. In this case, the pre-cleaning action can also be performed by discharging a smaller amount of water from the discharge sections 24A, 24B (which also serve as secondary discharge sections 32) than the amount of water discharged from the discharge sections 24A, 24B during toilet cleaning.

[0086] There is no particular limitation on the number of discharge sections 24A and 24B of the cleaning mechanism 16. The more the number of discharge sections 24A and 24B increases, the easier it is to achieve a flow rate of 1.5 or higher for the cleaning water within the target range. However, the number of discharge sections 24A and 24B can also be only one.

[0087] The cleaning mechanism 16 is configured to ensure that the flow rate of the cleaning water discharged from the discharge sections 24A and 24B is at least 1.5. It is not necessary for the flow rate of the cleaning water in the first basin surface 62 of the toilet 12 to be at least 1.5. There is no particular limitation on the specific locations within the toilet bowl section 14 of the toilet 12 where the flow rate of the cleaning water is at least 1.5. For example, within the circumferential range of the toilet bowl section 14, the flow rate of the cleaning water may be at least 1.5 only in one of the front area 68 and the rear area 70, while the flow rate is less than 1.5 in other areas. Furthermore, the flow rate of the cleaning water may be at least 1.5 only in two locations separated by the accumulated water surface 60, while the flow rate is less than 1.5 in other areas.

[0088] The cleaning mechanism 16 may also form only one of the swirling water flow 76 and the flowing water flow 78 within the entire circumference of the toilet bowl 14, such that the flow velocity of the formed water flow is 1.5 or more.

[0089] The above embodiments and variations are examples. These abstract technical concepts should not be interpreted as limited to the contents of the embodiments and variations. The contents of the embodiments and variations can be modified in various ways, such as changing, adding, or deleting constituent elements. In the above embodiments, the description of "embodiment" is added to emphasize the content that allows such design changes. However, design changes are permitted even without such description. The shading added to the cross-section of the drawings does not limit the material of the object to which the shading is added.

[0090] Explanation of reference numerals in the attached figures

[0091] 10: Toilet device

[0092] 12: Toilet

[0093] 14: Bedpan area

[0094] 16: Cleaning organization

[0095] 24A, 24B: Discharge section

[0096] 60: Accumulated water surface

[0097] 62: First pelvic face (pelvic face)

[0098] 68: Area Ahead

[0099] 70: Rear Area

[0100] 72: Right side area

[0101] 74: Left side area

[0102] 76: Swirling Water Flow

[0103] 80: First half

[0104] 82: The Second Half

Claims

1. A toilet device, wherein, have: Bedpan area; A cleaning mechanism that supplies cleaning water with a flow rate of 1.5 m / s or higher to the toilet bowl for cleaning the toilet. The cleaning mechanism has a discharge section that discharges the cleaning water into the toilet bowl, and a swirling water flow is formed by supplying the cleaning water into the toilet bowl. The toilet bowl has a basin surface that is positioned above the water level and below the discharge section. The basin surface has a continuous sliding surface extending upwards from the accumulated water surface. The sliding surface does not form an inwardly protruding convex surface and is smoothly continuous in the vertical direction, covering the entire vertical area of ​​the basin surface. The toilet device is configured such that the flow velocity of the swirling water is 1.5 m / s or higher.

2. The toilet device as claimed in claim 1, wherein, The toilet device is configured such that the flow rate of the washing water in the basin is 1.5 m / s or more.

3. The toilet device as described in claim 1 or 2, wherein, The toilet device is configured such that the flow rate of the washing water in the rear half of the toilet bowl and in the basin surface is 1.5 m / s or more.

4. The toilet device as described in claim 1 or 2, wherein, The toilet device is configured such that the flow rate of the washing water in the front half of the toilet bowl and in the bowl surface is 1.5 m / s or more.

5. The toilet device as claimed in claim 1 or 2, wherein, The toilet device is configured such that the flow rate of the washing water in at least two of the front, rear, right, and left areas of the toilet bowl is 1.5 m / s or more.

6. The toilet device as claimed in claim 1 or 2, wherein, The toilet device is configured such that the flow rate of the washing water in the basin surface, which is in a dry state, is 2.0 m / s or more.

7. The toilet device as claimed in claim 1 or 2, wherein, The toilet device is configured such that the flow rate of the washing water in the wet basin surface is 1.5 m / s or more.

8. The toilet device as claimed in claim 1 or 2, wherein, The toilet device is configured such that the flow rate of the washing water in the rear half of the toilet bowl is faster than the flow rate in the front half of the toilet bowl.

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