JPH1163666A - Hot water storage type heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To satisfactorily decelerate a flowing velocity even if a flow rate of cold water is increased, by disposing a straightening means having a flat plate type water flow suppressing plate and a long water input tank formed integrally with the plate to communicate with an inlet at a position corresponding to the inlet of a hot water storage tank of a heat exchanger. SOLUTION: A hot water storage type heat exchanger 5 for a sanitary cleaning unit installed at a toilet body comprises a hot water storage tank A having upper and lower tanks 5a, 5b, and a heater 9 inserted from a side of the tank 5b into its interior. In this case, a straightening means 21 is provided at a position corresponding to an inlet 7 of cold water of the tank A. Cold water flowing from the inlet 7 is fed into the tank A in the state that the water is decelerated at its flowing velocity by a water input tank 23 of the means 21, decelerated at its flowing velocity by raising it while mixing it with warm water existing in a space formed between a bottom of the tank A and the plate 22 of the means 22, thereby preventing supplying of the cold water directly from an outlet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sanitary washing apparatus in which hot water is sprayed from a nozzle device to clean a local part of a human body. The present invention relates to an improvement of a hot-water storage type heat exchange device that supplies heat to a nozzle device by heating the same.

[0002]

2. Description of the Related Art Conventionally, a sanitary washing apparatus in which hot water is ejected from a nozzle device to wash a local part of a human body is generally configured as shown in FIG. In FIG. 17, the sanitary washing device 100 is connected to a water supply source (not shown), and controls a water supply to a hot water storage type heat exchange device described later, and a hot water and water supply source (shown in FIG. 17). A hot-water storage type heat exchange device 102 for heating cold water supplied from a not-shown) through the valve unit 101 to an appropriate temperature, a flow control valve 103 for controlling the flow of hot water,
And a nozzle device 104 for injecting hot water toward a local area. Reference numeral 105 shown in FIG. 17 denotes a control device for controlling the drive of the valve unit 101, the hot-water storage type heat exchange device 102, the flow rate control valve 103, and the nozzle device 104.

Next, the structure of the hot water storage type heat exchanger (hereinafter simply referred to as heat exchanger) 102 will be described with reference to FIG. As shown in FIG. 18, for example, the heat exchange device 102 is formed by combining a lower tank 106 having an inlet 106a for cold water and an upper tank 107 having an outlet 107a for warm water for local cleaning. A required space is formed in the space, and hot water for local cleaning is stored in the space.

[0004] Next, reference numeral 108 denotes the heat exchange device 102.
This is an L-shaped heater for heating the hot water stored in the inside and the cold water flowing from the inlet 106a to an appropriate temperature. Reference numeral 109 denotes a temperature sensor which is attached at a position where the temperature of the water discharged and the temperature of the hot water in the heat exchanger 102 can be uniformly detected without being directly affected by the heat of the heater 108. Reference numeral 110 denotes a Z-shaped rectifying plate for reducing the flow rate of cold water flowing from the inlet 106a.
08 at a predetermined distance from the bottom surface of the lower tank 106.

In FIG. 18, reference numeral 111 denotes the temperature sensor 10
Reference numeral 9 denotes a bimetal switch for preventing the hot water from overheating at or above the set temperature when a failure occurs, and reference numeral 112 denotes a float switch for preventing the hot water from being heated.

FIG. 19 is a block diagram schematically showing an embodiment of a temperature control section provided in the control device 105. As shown in FIG. The temperature control unit shown in FIG. 19 includes a temperature setting circuit 113 having a switch for setting temperature such as a volume, a temperature detection circuit 114 having a temperature sensor 109 (see FIG. 18), and a temperature setting circuit 113. Is compared with the temperature detected by the temperature sensor 109, and outputs a "L" level signal when the set temperature> the detected temperature, and outputs an "H" level signal when the set temperature ≦ the detected temperature. And a comparison circuit 115 that outputs
When the output signal is low, the heater 108
And the output signal from the comparison circuit 115 becomes “H”.
When the level is at the level, a heater control circuit 116 for stopping power supply to the heater 108 is provided.

The sanitary washing device 100 constructed as described above
When a washing switch (not shown) is turned on to perform local washing, cold water is supplied from a water supply source (not shown) to the inlet 106a of the heat exchange device 102 via the valve unit 101, and the inlet 106a Flows into the lower tank 106 in a state where the flow velocity is reduced by the rectifying plate 110 disposed at a position corresponding to. The hot water heated to an appropriate temperature stored in the heat exchange device 102 by the inflow of the cold water is sequentially pushed up to the outlet 107a side of the upper tank 107, flows out from the outlet 107a, and flows through the flow control valve 103. Is supplied to the nozzle device 104, and is jetted from a nozzle head 104a of the nozzle device 104 toward a local area.

The temperature control section of the control device 105 includes a temperature set by the temperature setting circuit 113 and a temperature detection circuit 11.
The comparison circuit 11 compares the temperature detected by the temperature sensor 109 of FIG.
5, when the detected temperature is lower than the set temperature (set temperature> detected temperature), a "L" level signal is output from the comparison circuit 115 as shown in FIG. The heater 108 is energized to heat the cold water flowing from the inlet 106a to the set temperature.

[0009]

However, the rectifying plate for reducing the flow rate of the cold water, which is disposed at a position corresponding to the inlet, has a heater disposed near the bottom surface of the lower tank as shown in FIG. Due to the fact that it is installed in a narrow space below the heater, the load for lowering the flow velocity is small, and as a result, the flow rate of cold water increases (for example, before performing local cleaning). In the case of cleaning the nozzle head, etc.), it has been difficult to satisfactorily reduce the flow rate of the cold water. Therefore, the cold water cannot be reduced in the flow velocity, and is not shown in FIG.
As shown by the dashed line, it circulates through the bottom of the lower tank, and
There is a problem that the temperature rises rapidly along the side wall in the direction of the upper tank, mixes with the hot water existing above the flow straightening plate to lower the temperature of the hot water, or is supplied directly from the outlet to the nozzle device.

Further, as shown in FIG. 18, the temperature sensor is mounted at a position where the temperature of the water discharged and the temperature of the hot water in the heat exchanger can be uniformly detected without being directly affected by the heat of the heater. Therefore, it takes a long time from the start of inflow of the cold water to the temperature sensor detecting the temperature of the cold water. That is, as shown in FIG. 20, even after the washing switch is turned on and the cold water flows into the lower tank, the relationship between the set temperature of the hot water and the temperature detected by the temperature sensor is in the state of set temperature ≦ detected temperature. During a certain period, power is not supplied to the heater, and power is supplied to the heater only when the relationship of set temperature> detected temperature is satisfied (when the temperature sensor detects cold water). However, even if the heater is energized from this state and heating of the chilled water is started, the chilled water is supplied to the nozzle device from the outlet before being heated to the set temperature. Supply time (t ₁ )
Not only is shortened, but also because hot water (low-temperature water) at a temperature lower than the set temperature is supplied to the nozzle device, giving a user a discomfort.

Further, in order to prolong the supply time of hot water to the nozzle device, it is conceivable to heat the cold water to a set temperature by forcibly energizing the heater immediately after the start of the flow of cold water. Immediately after the start, the boundary surface between the hot water and the cold water is formed at a position below the heater (the position of the flow straightening plate). In addition, hot water that has already been heated to the set temperature will also be heated, and convection will occur in the entire heat exchange device, so hot water heated above the set temperature will be supplied from the outlet to the nozzle device, The user may feel uncomfortable and uneasy.

In view of the above-mentioned various problems, the present invention can reduce the flow rate satisfactorily even if the flow rate of cold water increases, and furthermore, hot water having a temperature unsuitable for washing is supplied to the nozzle device. It is therefore an object of the present invention to provide a hot water storage type heat exchange device that reliably eliminates the problem of giving a user uncomfortable feeling.

[0013]

In order to solve the above-mentioned problems, a hot water storage type heat exchange device of the present invention comprises a hot water storage tank having an inlet for cold water and an outlet for hot water supplied from a water supply source. A heater that is mounted at a position close to the bottom surface of the hot water storage tank and heats hot water stored in the hot water storage tank and cold water flowing from the inlet to an appropriate temperature, and a temperature sensor that detects a temperature of the hot water. A heat exchange device, and a flat water flow suppression plate, and a vertically elongated water flow suppression plate formed integrally with the water flow suppression plate and communicating with the water inlet at a position corresponding to the inlet of the hot water storage tank of the heat exchange device. And a rectifying means comprising a simple water tank.

[0014] The rectifying means is characterized in that a predetermined space is provided between the water flow suppressing plate and the bottom surface of the hot water storage tank, and the heater is mounted so as to be close to the bottom surface of the hot water storage tank. .

The water flow restricting plate of the rectifying means includes a rear water flow restricting plate formed at an end opposite to the water inlet tank, a first lateral water flow restricting plate formed at an end in the width direction, and And a second side water flow regulating plate having a height dimension lower than that of the first side water flow regulating plate inside the first side water flow regulating plate.

The heater forcibly energizes the heater for a certain period of time immediately after the inflow of the cold water, and after a certain period of time, compares the temperature detected by the temperature sensor with the set temperature, and based on the comparison result, controls the energization. Is performed.

In the hot water storage type heat exchange apparatus according to the present invention, the cold water supplied from the water supply source flows into the hot water storage tank with its flow velocity once reduced in the water inlet tank, and the cold water is supplied to the bottom surface of the hot water storage tank. By ascending in a space formed between the plate and the plate, it mixes with warm water existing in the space to reduce the flow velocity. On the other hand, the cold water ascending in the space and hitting the water flow suppressing plate once flows down to the bottom side of the hot water storage tank by the rear and first and second side water flow regulating plates, and the hot water is stored in the hot water storage tank as much as possible. It pushes up from a low position and supplies it to a nozzle device. The heater is forcibly energized for a certain period of time immediately after the inflow of the chilled water to forcibly heat the chilled water to a temperature below the set temperature.

[0018]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIGS. FIG. 1 is a plan view showing a state in which a sanitary washing device provided with a heat exchange device of the present invention is installed in a toilet body. In FIG. 1, reference numeral 1 denotes a sanitary washing device installed by using an upper back portion of a toilet body 2. The sanitary washing device 1 includes an upper casing (only a part is shown in FIG. 1) 3.
a and the lower casing 3b are combined to form an internal space, and a functional unit is housed in the internal space.
By fixing the lower casing 3b to the upper back of the toilet main body 2, the sanitary washing device 1 is installed on the toilet main body 2.

The functional parts of the sanitary washing device 1 include, for example,
A controller (control device) (not shown) in an operation panel 3c formed so as to protrude forward on a side portion of the upper casing 3a,
Operation panel 3c stop switch SW ₁ is disposed on, bidet switch SW _2, the bidet switch SW _3, it is optionally actuated by manually operating the operation unit 3d, such as dry switch SW _4.

Next, the configuration of the sanitary washing device 1 will be described. Reference numeral 4 shown in FIG. 1 denotes a valve unit disposed between a water supply source (not shown) and a hot water storage type heat exchange device 5 (hereinafter simply referred to as a heat exchange device). Further, the heat exchange device 5
As shown in FIGS. 2 and 4, the upper and lower tanks 5a and 5b having hollow interiors are respectively connected to flanges 5c and 5d.
A hot water storage tank A is formed by, for example, heat welding at a portion of the hot water storage tank A, and a predetermined amount of suitable temperature water can be stored in a cavity inside the hot water storage tank A. Reference numeral 6a denotes a first water pipe connecting the valve unit 4 to a flow control valve (not shown), and 6b denotes a flush water inlet 7 (see FIG.
), And the cleaning unit supplies the cleaning water to the heat exchange device 5 via the flow control valve by driving the valve unit 4. In FIG. 1, reference numeral 8 denotes a hot-air drying device for drying local parts after washing.

Next, the structure of the heat exchanger 5 is shown in FIG.
This will be described in the following sections. The heat exchange device 5 is mounted on the lower casing 3b shown in FIG. 2 to 4, reference numeral 9 denotes a U-shaped heater for heating hot water stored in the heat exchanger 5 and cold water supplied from a water supply source (not shown) via the valve unit 4 to an appropriate temperature. As shown in FIGS. 2 and 4, the hot water storage tank A (lower tank 5b) is inserted into the lower tank 5b from the left side (left side in FIG. 2) at a predetermined distance from the bottom surface. Installed in condition.

In FIG. 2, reference numeral 10 denotes a temperature sensor mounted on the upper part of the hot water storage tank A (upper tank 5a).
It is mounted at a position where it is not directly affected by the heat of the water and the temperature of the discharged water and the temperature of the hot water in the hot water storage tank A can be uniformly detected. 11 is hot water storage tank A (upper tank 5
A bimetal switch attached to the upper part of a) for preventing the hot water from being heated to a set temperature or more when the temperature sensor 10 fails or the like, and a float switch 12 for preventing the hot water from being heated.

Reference numeral 13 shown in FIG. 2 designates an atmosphere opening / closing valve provided at a tap 14 above the hot water storage tank A.
3 has an air communication port 15 for communicating with the atmosphere and an outlet 16 for hot water, and further accommodates therein a valve element 17 which can be moved up and down with a valve seat 14a above the tap hole 14. Have been. When the hot water flows out, the valve body 1
7, the air communication port 15 is closed by the valve element 17,
When hot water is not flowing out, the valve body 17 falls by its own weight, closing the tap hole 14 and opening the atmosphere communication port 15. In addition, as shown in FIG.
Is connected via a hot water supply pipe 19. 1 and 3, reference numeral 20 denotes a water drainage plug for draining the heat exchange device 5 when necessary.

2 to 5, reference numeral 21 denotes a flow straightening means provided at a position corresponding to the cold water inlet 7 of the hot water storage tank A, and the structure thereof will be described with reference to FIGS.
As shown in FIGS. 4 to 8, the rectifying means 21 has a flat water flow suppression having a length dimension (horizontal direction in FIG. 4) substantially equal to a depth dimension (horizontal direction in FIG. 4) of the hot water storage tank A. A plate 22, an elongated water tank 23 formed integrally with one end of the water flow suppression plate 22 (the right side in FIGS. 4 and 7), and communicating with the cold water inlet 7;
A narrow notch 24 formed in the lower part of the wall surface 22a facing the inflow port 7 and a notch 24 formed in the lower part of the water inlet tank 23.
The flat shape standing on the bottom surface of the lower tank 5b in opposition to
It has a pair of ribs 25a and 25b in a letter shape.

In FIGS. 6 to 8, reference numeral 22a denotes a rear water flow regulating plate formed at a longitudinal end (left side in FIGS. 4 and 7) of the back surface of the water flow suppressing plate 22. Reference numeral 22b denotes a first lateral water flow regulating plate formed at a width direction end (the left-right direction in FIG. 2) of the back surface of the water flow suppressing plate 22. Further, a second side 22c is formed inside the first side water flow regulating plate 22b with a lower height dimension than the first side water flow regulating plate 22b.
It is a side water flow regulation plate.

As shown in FIGS. 3 to 5, the rectifying means 21 is provided with a groove 23c formed on the wall 23b of the water inlet tank 23 where the notch 24 is not formed.
The front wall of the lower tank 5b (right side of FIG. 4, FIG. 5)
Between the lower tank 5b and the support wall 5e formed on the bottom surface of the lower tank 5b.
A predetermined space is formed between the water flow suppressing plate 22 and the bottom surface.
The water flow suppression plate 22
To the lower tank 5 with a fastening member 26 such as a screw (see FIG. 3).
b. It is attached to the lower tank 5b by being fastened to a fastening support 5f (see FIG. 5) formed on the bottom surface.

Next, FIG. 9 shows the operation panel 3 of the sanitary washing device 1.
It is a block diagram showing roughly one example of the temperature control part provided in the controller (control device) which is not shown in c. In FIG. 9, reference numeral 31 denotes a temperature setting circuit provided with a switch for setting the temperature of a volume or the like (not shown). Reference numeral 32 denotes a temperature detection circuit including the temperature sensor 10 (see FIG. 2). 33 compares the temperature set by the temperature setting circuit 31 with the temperature detected by the temperature detection circuit 32,
This is a comparison circuit that outputs an “L” level signal when the detected temperature is reached, and outputs an “H” level signal when the set temperature ≦ the detected temperature.

Reference numeral 34 denotes a signal output at the "L" level for a predetermined time in response to the ON input signal of the posterior cleaning switch SW ₂ or the bidet cleaning switch SW ₃ , and switches the respective cleaning switches SW ₂ and SW ₃ . This is a timer circuit that outputs an "H" level signal before turning on and after a predetermined time has elapsed. An AND element 35 performs an AND operation on the output signal from the comparison circuit 33 and the output signal from the timer circuit 34. Numeral 36 denotes a heater control circuit for energizing the heater 9 only when the output signal from the AND element 35 is at "L" level.

Next, the operation of the heat exchange device 5 according to the present invention will be described with reference to FIGS.
Here, the case where the buttocks are washed will be described. First, at the stage before performing the posterior washing, when the temperature detected by the temperature sensor 10 of the temperature detecting circuit 32 is lower than the set temperature (set temperature> detected temperature) as shown in FIG. Level signal is output,
Further, since an “H” level signal is output from the timer circuit 34, an “L” level signal is output from the AND element 35, whereby the heater control circuit 36 energizes the heater 9, and Is heated to the set temperature.

When the temperature of the hot water reaches the set temperature (set temperature ≦ detected temperature), the comparison circuit 33 outputs an “H” level signal. Further, since the output signal from the timer circuit 34 is at the “H” level, an “H” level signal is output from the AND element 35, whereby the heater control circuit 36 stops energizing the heater 9 and the hot water is discharged. Prevents boiling above the set temperature.

Here, for example, in order to perform cleaning, FIG.
ON the bottom wash switch SW ₂ shown in Then, cold water is supplied from the water supply source (not shown) to heat exchanger 5 via the valve unit 4. As shown by a dashed line in FIG. 4, the cold water flows into the vertically long water inlet tank 23 from the inflow port 7 to temporarily reduce its flow rate.
It flows into the hot water storage tank A through the narrow notch 24 formed at the lower part.

Subsequently, the cold water flowing into the hot water storage tank A collides with the ribs 25a and 25b erected at a position facing the notch 24 as shown by a dashed line in FIG. It changes diagonally upward and the lower tank 5b
In the space formed between the bottom surface and the water flow suppression plate 22 of the rectification means 21, the water rises while mixing with the warm water existing in the space and collides with the water flow suppression plate 22. Thereby, since the cold water receives a large load, the flow velocity can be favorably reduced.

The cold water colliding with the water flow restricting plate 22 is further subjected to the rear water flow restricting plate 22a and the first and second side water flow restricting plates 22b, 22c formed on the water flow restricting plate 22.
Thus, as shown in FIGS. 2 and 3, the flow is changed obliquely downward. As described above, the chilled water whose flow has been changed obliquely downward is directed toward the bottom surface of the lower tank 5b in a state where the flow velocity is satisfactorily reduced, as indicated by a dashed line in FIG. Divide the water evenly and push up the hot water sequentially.

As described above, in the heat exchange device 5 of the present invention, the flow rate of the cold water flowing into the hot water storage tank
3. The space formed between the bottom surface of the lower tank 5b and the water flow suppression plate 22 by temporarily lowering the flow at 3 and further changing the flow of the cold water obliquely upward by the ribs 25a and 25b erected on the bottom surface of the lower tank 5b. The water is raised while being mixed with the warm water existing therein, and is lowered by colliding with the water flow suppressing plate 22. Therefore, the cold water satisfactorily reduces the flow velocity even if the flow rate into the hot water storage tank A increases. It becomes possible. As a result, the cold water flowing into the hot water storage tank A is
Since it does not rise suddenly in the upward direction of the hot water storage tank A, it does not mix with the hot water existing above the rectifying means 21 to lower the temperature of the hot water and is not supplied directly to the nozzle device 18 at all. .

As described above, the flow rate of the chilled water is reduced below the rectifying means 21 so that the chilled water can be prevented from rising rapidly in the upper direction of the hot water storage tank A. A boundary surface between hot water and cold water can be formed at the position of the water flow suppressing plate 22 of the means 21.

Further, ON and bottom wash switch SW ₂ Then, as shown in Figure 10, instantaneous input signal is "H"
The level changes from the level to the “L” level. As a result, the output signal from the timer circuit 34 changes from the “H” level to the “L” level, and since the “H” level signal is output from the comparison circuit 33, the AND element 35 outputs the “L” level. The heater control circuit 36 energizes the heater 9 by outputting a signal.

As described above, the buttocks washing switch SW ₂
Is turned on, the heater 9 is forcibly energized, so that the cold water flowing into the hot water storage tank A is heated by the heater 9. At this time, the boundary surface between the hot water and the cold water is formed at a position above the heater 9 (the position of the water flow suppression plate 22 of the rectifying means 21), and the boundary surface separates the hot water and the cold water from each other. by act, even if the current to the bottom wash switch SW ₂ to turn oN at the same time the heater 9, being heated by the heater 9, mixed with hot and cold water is present below the boundary surface Only water having a temperature lower than the set temperature (hereinafter referred to as low-temperature water), and the warm water heated to the set temperature existing above the boundary surface is not further heated by the heater 9 at all.

Then, the buttocks washing switch SW ₂ is turned on.
When a predetermined time T (for example, 20 seconds) elapses after this operation, the “H” level signal is output again from the timer circuit 34 as shown in FIG. Since the level signal is output, AND
The element 35 outputs an “H” level signal. This causes the heater control circuit 36 to stop energizing the heater 9.

The flow rate of the cold water flowing into the hot water storage tank A can be satisfactorily reduced in the space formed between the bottom surface of the lower tank 5b and the water flow suppressing plate 22 of the rectifying means 21, so that the hot water and the cold water Without breaking the boundary of
The hot water existing above the boundary surface is sequentially pushed up and supplied to the nozzle device 18 via the hot water outlet 14 → the outlet 16 of the atmospheric on-off valve 13 → the hot water supply pipe 19. The hot water supplied to the nozzle device 18 is jetted from a nozzle head (not shown) of the nozzle device 18 toward a local portion.

As described above, the cold water (low-temperature water) sequentially pushes up the boundary surface by the inflow, and when the temperature detected by the temperature sensor 10 of the temperature detection circuit 32 becomes lower than the set temperature, the comparison circuit 33 outputs “ Since the L-level signal is output and the “H” -level signal is output from the timer circuit 34, the output signal from the AND element 35 is at the “L” level, whereby the heater control circuit 36 The heater 9 is energized again to heat low-temperature water existing below the boundary surface.

The cold water that is present below the boundary surface is simultaneously turned ON the bottom wash switch SW _2, to force a current to the heater 9, by heating a predetermined time, advance to a certain temperature Because it is heated,
As described above, after the low-temperature water is detected by the temperature sensor 10 of the temperature detection circuit 32, the heater 9 is re-energized to heat the low-temperature water, and as shown in FIGS. It is possible to favorably suppress a decrease in the temperature of the discharged hot water. As a result, the time t ₂ for supplying hot water to the nozzle device 18 can be made longer than before, and the amount of water supply can be increased.

As shown by the dashed line in FIGS. 2 and 3, the cold water having the reduced flow velocity has a rear water flow restricting plate 22a and a side water flow restricting plate 22b formed on the water flow restricting plate 22.
22c circulates obliquely downward (toward the bottom surface of the lower tank 5b) and pushes up the low-temperature water existing below the water flow suppressing plate 22 from a position as low as possible, so that the heater 9 existing near the boundary surface is used. Low-temperature water heated to a temperature close to the set temperature can be efficiently supplied to the nozzle device 18.

[0043] To end the cleaning result ON the stop switch SW ₁ shown in FIG. 1, cold water supply to the heat exchanger 5 is stopped from the water supply source, and, from the heat exchanger 5 to the nozzle device 18 Since the supply of the hot water is stopped, the cleaning is completed.

When the temperature of the hot water (detection temperature) in the heat exchange device 5 is lower than the set temperature after the completion of the cleaning, the heater 9 is continuously energized until the hot water reaches the set temperature, as shown in FIG. When the heater is heated, when the hot water temperature (detection temperature) reaches the set temperature, the power supply to the heater 9 is stopped to prevent the hot water from being heated to the set temperature or higher, and to prepare for the next cleaning.

[0045] In the case of performing the bidet, the heat exchanger 5, by turning ON the bidet switch SW ₃ shown in FIG. 1, it operates similarly to the case of the bidet.

Next, referring to FIGS.
A description will be given of a second embodiment of the temperature controller provided in the controller (not shown) in FIG. In the second embodiment, the same parts as those in the first embodiment will be described with the same reference numerals. FIG. 11 is a block diagram schematically illustrating a temperature control unit according to the second embodiment. In FIG. 11, reference numeral 40 denotes ROM, R
A one-chip microcomputer (hereinafter, simply referred to as a microcomputer) having an AM, a timer, a counter, and the like, for example, a program as shown in the flowcharts of FIGS. The input side of the microcomputer 40, the temperature setting circuit 31 with a switch for temperature setting (not shown) the volume or the like, respectively, the temperature detection circuit 32 with a temperature sensor 10, bottom wash switch SW ₂ is connected, also On the output side, a heater control circuit 3
6 are connected.

Next, referring to FIGS. 11 to 15,
The control of the hot water temperature by the temperature control unit of the second embodiment will be described. FIG. 12 is a flowchart of a main routine,
13 is a flowchart of a switch input subroutine called in the main routine of FIG. 12, FIG. 14 is a flowchart of a heater control subroutine called in the main routine of FIG. 12, and FIG. 15 is a flowchart of a timer subroutine called in the main routine of FIG. is there.

[0048] First, when the switch input subroutine called in step S1 in FIG. 12, in step S11 the switch input subroutine shown in FIG. 13, for example, determines whether bottom wash switch SW ₂ is ON. In the case of YES, the process proceeds to step S12 and FIG.
A set time T (for example, 20 seconds) is set in a counter t in the microcomputer 40 indicated by (5), and the process returns to the main routine of FIG. In the case of NO, the process returns to the main routine of FIG.

Next, when the heater control subroutine is called in step S2 of FIG. 12, in step S21 of the heater control subroutine shown in FIG. 14, the hot water temperature (set temperature) set by the temperature setting circuit 31 shown in FIG.
α is compared with the hot water temperature (detected temperature) α _S detected by the temperature detection circuit 32 (temperature sensor 10). And α
When −α _S > 0, the process proceeds to step S22, in which an energization command is output to the heater control circuit 36 shown in FIG. 11 to energize the heater 9, and the process returns to the main routine of FIG. If α−α _S ≦ 0, the process proceeds to step S23, and it is determined whether or not the set time set in the counter t in the microcomputer 40 is 0. If NO, the process proceeds to step S22, in which an energization command is output to the heater control circuit 36 shown in FIG. 11 to energize the heater 9, and the process returns to the main routine in FIG. When the determination is YES, the process proceeds to step S24, in which a power supply stop command is output to the heater control circuit 36 shown in FIG. 11 to stop power supply to the heater 9, and the process returns to the main routine in FIG.

Subsequently, when the timer subroutine is called in step S3 of FIG. 12, in step S31 of the timer subroutine shown in FIG. 15, whether the set time set in the counter t in the microcomputer 40 shown in FIG. Determine whether or not. If NO, step S3
Proceeding to 2, the counter t is set to t-1 (a value obtained by subtracting 1 second from the set time set in the counter t),
It returns to the main routine of FIG. If YES, the process returns to the main routine of FIG.

[0051] Thus, the second embodiment, for example, if the bottom wash switch SW ₂ is turned ON, the microcomputer 4
The heater 9 is forcibly turned on for only the set time T set in the counter t within 0 to heat the inflowing cold water, and after the set time T has elapsed, the set temperature α and the detected temperature α _S are compared. Then, the power supply to the heater 9 is controlled based on the comparison result.

Next, a third embodiment of the temperature control unit provided in a controller (not shown) in the operation panel 3c will be described with reference to FIG. In the third embodiment, the same parts as those in the first embodiment will be described by the same reference numerals. FIG.
FIG. 13 is a sequence diagram illustrating a temperature control unit according to a third embodiment. 16, in order to carry out cleaning for example, ON and bottom wash switch SW ₂ Then, contact X is ON relay X is excited, thereby being energized to the timer T is excited the timer T, the contact T Turn ON. As a result, the heater 9 is energized, and the inflowing cold water is heated by the heater 9. Then, when a predetermined time has elapsed, the contact T of the timer T is turned off, so that the power supply to the heater 9 is stopped. When the detected temperature is lower than the set temperature,
The temperature control switch 50 is turned on to energize the heater 9 to heat the hot water to the set temperature, and when the hot water reaches the set temperature, the temperature control switch 50 is turned off to stop energizing the heater 9.

[0053] Thus, the third embodiment, for example, when the bottom wash switch SW ₂ is ON, the relay X and the timer T is then turned ON respective contacts X and T are excited, forces the predetermined time The heater 9 is energized to heat the flowing cold water, and after a lapse of a predetermined time (after the contact T of the timer T is turned off), the set temperature is compared with the detected temperature, and the temperature control switch is set based on the comparison result. 50 ON / O
The power supply to the heater 9 is controlled by performing the FF.

[0054]

As described above, according to the present invention, the cold water flowing from the inflow port is allowed to flow into the hot water storage tank with the flow velocity once reduced in the water inlet tank of the rectifying means, and the cold water flows into the hot water storage tank. The rising ribs change the flow obliquely upward, and further raise the space formed between the bottom surface of the hot water storage tank and the water flow suppression plate of the rectifying means while mixing with the warm water existing in the space. Thus, the flow rate of the chilled water is reduced by colliding with the water flow suppression plate of the rectifying means, so that the flow rate of the chilled water can be satisfactorily reduced even if the flow rate increases.

Further, the chilled water whose flow velocity has been reduced by the rectifying means does not suddenly ascend to the upper part of the hot water storage tank along the side wall as in the prior art, so that the chilled water exists above the rectifying means. Problems caused by mixing with hot water to lower the temperature of the hot water or being supplied directly from the outlet to the nozzle device can be reliably prevented.

Further, the water flow suppressing plate of the rectifying means is disposed so as to straddle the heater with a predetermined space provided between the rectifying means and the bottom surface of the hot water storage tank, and the flow rate of the cold water is reduced at a position below the water flow suppressing plate. By doing so, the boundary surface between the hot water and the cold water can be formed at a position above the heater. Therefore, even if the heater is forcibly energized immediately after the start of inflow of the cold water, the boundary surface serves as a wall. Because the hot water heated to the set temperature above the boundary is not heated, only the low-temperature water that is a mixture of cold water and hot water below the boundary is heated, The problem that hot water heated to a low temperature is supplied to the nozzle device can be surely solved.

Further, by forming rear and side water flow regulating plates for regulating the flow direction of the cold water on the back surface of the water flow suppressing plate of the rectifying means, the flow velocity between the hot water storage tank and the water flow suppressing plate is reduced. The chilled water can be circulated diagonally downward (toward the bottom surface of the hot water storage tank) by the rear and side water flow regulation plates without flowing in the horizontal direction (front and rear, left and right directions) along the water flow suppression plate. Since it is possible to push up low-temperature water mixed with hot water and cold water present below the water flow suppression plate from a position as low as possible, existing near the interface, low-temperature water heated to a temperature close to the set temperature by a heater, It can be efficiently supplied to the nozzle device.

Further, the heater forcibly energizes for a certain time immediately after the start of inflow of the cold water, and after a certain time elapses, compares the temperature detected by the temperature sensor with the set temperature, and controls the energization based on the comparison result. The cold water can be heated to a certain temperature in advance immediately after the start of the inflow, and as a result, as in the prior art, the temperature sensor detects the temperature of the cold water and then cools the cold water. As compared with the case where the water is heated, the time for supplying hot water to the nozzle device can be lengthened by making the decrease in the water discharge temperature gentler without rapidly lowering the water discharge temperature.

[Brief description of the drawings]

FIG. 1 is a plan view showing the inside of a sanitary washing device provided with a heat exchange device of the present invention.

FIG. 2 is a front view of a heat exchange device according to the present invention, in which main parts are cut away.

FIG. 3 is a plan view showing the inside of a lower tank of the heat exchange device.

FIG. 4 is a vertical sectional side view of the heat exchange device.

FIG. 5 is an enlarged cross-sectional plan view showing a main part of a lower tank.

FIG. 6 is a perspective view showing a rectifying unit.

FIG. 7 is a vertical sectional side view of the rectifying means.

8 is a vertical sectional front view taken along the line II of FIG. 7;

FIG. 9 shows a first example of the temperature control unit in the heat exchange device of the present invention.
It is a block diagram showing an example.

FIG. 10 is a time chart of a hot water temperature control operation in the first embodiment.

FIG. 11 is a block diagram showing a second embodiment of the temperature control unit in the heat exchange device of the present invention.

FIG. 12 is a flowchart of a main routine in a temperature control unit according to the second embodiment.

FIG. 13 is a flowchart of a switch input subroutine called in the main routine of FIG. 12;

FIG. 14 is a flowchart of a heater control subroutine called in the main routine of FIG. 12;

FIG. 15 is a flowchart of a timer subroutine called in the main routine of FIG. 12;

FIG. 16 is a sequence diagram showing a third embodiment of the temperature control unit in the heat exchange device of the present invention.

FIG. 17 is a schematic configuration diagram showing a conventional sanitary washing device.

FIG. 18 is a vertical sectional front view showing a conventional heat exchange device.

FIG. 19 is a block diagram of a temperature control unit in a conventional heat exchange device.

FIG. 20 is a time chart of hot water temperature control in a conventional heat exchange device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sanitary washing device 5 Heat exchange device 5a Upper tank 5b Lower tank 7 Inlet 9 Heater 10 Temperature sensor 16 Outlet 21 Straightening means 22 Water flow suppressing plate 22a Rear water flow restricting plate 22b First lateral water flow restricting plate 22c Second Side water flow regulation plate 23 Water tank 24 Notch 25a, 25b Rib 31 Temperature setting circuit 32 Temperature detection circuit 33 Comparison circuit 34 Timer circuit 35 AND element 36 Heater control circuit A Hot water storage tank

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Toshibutsu Ozawa 1 Aichi-cho, Kasugai-shi, Aichi Prefecture Inside Aichi Electric Co., Ltd.

Claims (4)

[Claims] A hot water storage tank provided with an inlet for cold water and an outlet for hot water supplied from a water supply source; hot water attached to a position close to a bottom surface of the hot water storage tank and stored in the hot water storage tank; A heater for heating the cold water flowing from the inflow port to an appropriate temperature and a temperature sensor for detecting the temperature of the hot water constitute a heat exchange device, and the heat exchange device is provided at a position corresponding to the inflow port of the hot water storage tank. A hot water storage type heat exchange device, comprising: a rectifying means including a flat water flow suppression plate and a vertically long water tank formed integrally with the water flow suppression plate and communicating with the inlet. 2. The rectifying unit is characterized in that a predetermined space is provided between the water flow suppressing plate and the bottom surface of the hot water storage tank, and the rectifying unit is disposed so as to straddle a heater mounted close to the bottom surface of the hot water storage tank. The hot water storage type heat exchange device according to claim 1, wherein 3. The water flow suppressing plate of the rectifying means includes a rear water flow restricting plate formed at an end opposite to the water inlet tank, and a first lateral water flow restricting plate formed at an end in the width direction. And a second side water flow regulating plate having a height dimension lower than that of the first side water flow regulating plate inside the first side water flow regulating plate. The hot water storage type heat exchange device according to claim 1 or 2, wherein 4. The heater forcibly energizes for a certain period of time immediately after the inflow of cold water, and after a lapse of a certain period of time, compares the temperature detected by the temperature sensor with a set temperature, and based on the comparison result, 2. The hot-water storage type heat exchange device according to claim 1, wherein the power supply control is performed.