JPH07283A - Circulating cleaning type electric hot water storage vessel - Google Patents

Abstract

PURPOSE:To realize the good cleaning function by circulating the liquid till a control means works and the cleaning end temperature is discriminated by the flow amount which is set according to the flow amount of the liquid. CONSTITUTION:A circulating route 311 which returns the liquid in a vessel 2 is branch connected through a changeover valve 312 from the top of a reverse U-shaped bending part of an extraction path 11. The valve 312 switches the liquid sent by an extraction pump 13 to the side of a discharge port 19 or to the side of the circulating route 311. The flow of the liquid which flows fro the discharge route 11 to the circulating route 311 and is returned to the vessel 2 circulates repeatedly for the prescribed time. In the processing routine for removing bleaching powder, the judgement of the liquid amount is performed through a liquid amount detection part 21. When the power is applied, the liquid amount is read on the condition that the prescribed temperature T1 at which the cleaning processing starts can be obtained and circulation of the liquid is performed till the prescribed temperature at which the cleaning ends can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circulation purifying type electric hot water storage container, and more particularly to a circulation purifying type electric hot water storage container capable of purifying and storing hot water while circulating a content liquid.

[0002]

2. Description of the Related Art Conventionally, electric hot water storage containers have been widely provided as household electric pots.

[0003] This product keeps the content liquid in a heat-retaining state, or keeps it in a heat-retaining state after boiling water and stores hot water, so that the content liquid at a temperature necessary for extracting coffee or tea can be supplied at any time.

The content liquid is heated for the purpose of boiling or keeping it warm, and in particular, when heated for boiling water, the content liquid is brought into a boiling state to cause an offensive odor, or calcination or its compound, trihalomethane. Foreign matter is released.

However, the foreign matter is not sufficiently diffused only by the heat retention or heating for boiling water.

Therefore, it has been considered to enhance the effect of removing chlorine by continuing the boiling state for a predetermined period of time or repeating the boiling state appropriately.

However, even if this is the case, the diffused scaly component is difficult to escape to the outside of the body and may stop inside the body and adhere to the surroundings of the body. The removal is still insufficient.

[0008] On the other hand, Japanese Utility Model Laid-Open No. 5-7530 discloses a solution to such a problem, in the hot water storage, by passing a purifying agent while circulating a content liquid with a pump as needed, a strange odor, Alternatively, there is disclosed a circulation purification type electric hot water storage container capable of sufficiently removing foreign matter such as chlorine.

[0009] This product performs circulation purification treatment for a short time immediately before boiling, performs circulation purification treatment for a time corresponding to the amount of hot water, and performs circulation purification treatment for a time corresponding to the amount of additional water and the total water amount. With this, the circulation purification treatment can be performed according to various states of the hot water.

[0010]

By the way, a harmful substance such as trihalomethane, which is generated in the content liquid, is actively generated in a specific temperature range of the content liquid, and the amount of the liquid is increased by the temperature rising characteristic of the content liquid. It is preferable that the temperature range is within a specific temperature range for stable determination without being affected by the outside air temperature, even when judged by.
Further, there is a temperature dependency depending on the purifying agent used for the circulation purification, and there is an optimum temperature range for the purifying function.

However, in the one disclosed in the above publication, the temperature of the hot water often does not become constant in various circulation purification treatments. Therefore, although the control is complicated,
In each of the above cases, the treatment is carried out at a time outside the temperature range, and the purification efficiency is poor, and even if the purification treatment is performed for the circulation purification time set according to the state of the hot water, the treatment is insufficient. Alternatively, there is a problem that the liquid amount determination is inaccurate and, as a result, the purification is not performed satisfactorily.

[0012] Therefore, an object of the present invention is to provide a circulation purification type electric hot water storage container which can always perform a sufficient purification treatment by keeping the optimum temperature range with a simple control.

[0013]

In order to achieve the above-mentioned object, the present invention provides a circulation path for guiding the content liquid in the body to the outside and then returning it to the body again. A circulating purification type electric hot water storage container comprising a pump that circulates a liquid and a purifying unit that is located in a part of the flow path of the circulating content liquid and that purifies the circulating content liquid with a purifying agent. A purification start determining means for determining that the temperature has reached a predetermined temperature for starting purification, and a purification end determining means for determining that the content liquid has reached a predetermined temperature for ending the purification,
A control means for circulating the content liquid at a flow rate corresponding to the amount of the content liquid until the purification end predetermined temperature is determined when the purification start predetermined temperature is determined. Is.

It is preferable that the control means controls the drive voltage of the pump according to the amount of the content liquid to control the flow rate.

[0015]

According to the above configuration of the present invention, the control means operates when the predetermined purification start temperature is determined by the determination means, and the purification is performed at the flow rate set according to the liquid volume of the content liquid by the liquid volume setting means. The content liquid is circulated until the end predetermined temperature is discriminated by the discriminating means, and the content liquid is repeatedly contacted with the purifying section provided in a part of its own flow passage to be forcibly purified. Is achieved within a predetermined temperature range of the content liquid, for example, the temperature range in which the removal target such as trihalomethane of the content liquid is actively generated, the temperature range optimal for the purifying function of the purifying agent, or the liquid content liquid. Circulation purification processing can be performed without removing the optimum temperature range for purification, which is the temperature range in which quantity determination can be performed stably. Moreover, since the flow rate of the content liquid during circulation is set according to the liquid amount of the content liquid, the temperature rise time corresponding to the liquid amount until the temperature goes out of the predetermined temperature range is used to obtain the predetermined liquid amount. The content liquid can be circulated and purified.

If the control means controls the flow rate by controlling the drive voltage of the pump according to the amount of the content liquid, the flow rate control can be easily achieved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A circulation purification type electric hot water storage container as one embodiment of the present invention will be described in detail below with reference to the drawings.

This embodiment shows the case of an electric pot capable of boiling water and pouring the content liquid by a non-pressurized type electric pump. As shown in FIG. 1, the heater 61
The inner container 2 applied to the lower surface of the bottom is housed in the outer case 3 to form the body 1.

The inner container 2 receives an upper end flange by a shoulder member 4 made of synthetic resin, which is forcibly fitted to the upper end of the outer case 3.

A bottom ring 5 made of synthetic resin is applied to the lower end of the outer case 3, and the bottom ring 5 and the bottom of the inner container 2 are connected by a connecting fitting (not shown) to form the outer case 3 and the inner container 2. And the bottom ring 5 are integrated with each other. A bottom cover 10 is attached to the opening of the bottom ring 5 by fitting a plurality of claws and fixing it with a screw at one place, and the bottom cover 10 has a plurality of claws 8 provided on the outer peripheral surface of the bottom face for rotation. The seat body 9 is rotatably fitted, and when the body body 1 is placed, the body body 1 slides and rotates on the rotary seat body 9.

A pouring path 11 for pouring out the content liquid is connected to the bottom of the inner container 2. The pouring path 11 is a space between the inner container 2 and the outer case 3 and rises up into a beak-shaped projection 12 provided at the front of the shoulder member 4 and bends in an inverted U shape at this portion. The discharge port 19 opens downward.
An electric pouring pump 13 for feeding the content liquid flowing into the pouring path 11 to the discharge port 19 is provided in a portion of the pouring path 11 below the inner container 2, and is driven by a motor 14. There is.

A liquid injection guide 16 is attached to a lower cover 15 fitted to the lower side of the beak-like protrusion 12 and attached to the front of the outer case 3.
, And the content liquid discharged from the discharge port 19 is once opened to the atmosphere and then received by the liquid injection guide 16 to be guided and injected.

The liquid injection guide 16 has a double pipe structure,
The discharge content liquid is easily released to the atmosphere, and the outside air is sucked at the time of injection to form the injection liquid into fine bubbles together with the foam breaking net 20 so that the injection can be performed extremely quietly and without bounce. ing.

The liquid injection guide 16 is detachably attached to the lower cover 15 by a screwing portion 18 to an opening provided in the lower cover 15. Further, the rising portion of the pouring path 11 is provided with a liquid volume detector 21 for detecting the liquid volume by using the same liquid level as the inner container 2 by an electrostatic method or a photo sensor method.

A heat shield plate 24 is screwed to the bottom of the inner container 2 using a metal fitting 23, and a holding spring 28 is sandwiched between the heat shield plate 24 and the back side of the heater 61. 61 is pressed against the bottom surface of the bottom of the inner container 2. The motor 14 is attached to a part of the heat shield plate 24.

A temperature sensor 33 for detecting the temperature of the content liquid is provided in a through hole in the center of the heater 61, and a holding plate 35 screwed to the heat shield plate 24 passes the temperature sensor 33 through the heat shield plate 24. keeping.

The bottom ring 5 is provided with a circuit housing box 41. The circuit housing box 41 includes a lid portion 42 integrally formed with the bottom ring 5, and a container portion 44 attached to the lid portion 42 from below. A seal packing 47 is sandwiched at a joint between the container portion 44 and the lid portion 42 to form the circuit housing box 41 as a hermetic container. This makes the circuit board 48 housed in the circuit housing box 41 sufficiently waterproof.

A body lid 62 is provided on the upper end of the body 1. The body lid 62 has a hinge pin 3 on the shoulder member 4 at the rear portion thereof.
It is pivotally attached by means of 3 so that it can be opened and closed and detached.

This pivoting is performed on the bearing member 64 detachably fitted to the shoulder agent 4, and the container lid 62 can be attached and detached by attaching and detaching the bearing member 64. This facilitates cleaning of the inside of the container 1 and supply / drainage of the content liquid.

The bearing member 64 is inserted into the recess 65 of the shoulder member 4 from above, and the resin spring piece 164 elastically engages with the locking portion 66 in the recess 65 to prevent accidental disengagement. In order to securely lock the bearing member 64 in the mounted state and to release the bearing member 64, a lock member 67 having a hook portion elastically engaged with a part of the bearing member 64 inserted into the recess 65 is provided. The lock is released by sliding the lock member 67 against the spring 221 in the lock release direction.

The body lid 62 and the bearing member 64 are connected to each other by the spring 6
8 is urged in the opening direction, and the closed state is the vessel lid 62.
The lock member 69 provided at the front end portion of is locked by being engaged with the locking portion 72 provided at a part of the shoulder member by the bias of the spring 71.

The lock member 69 is guided forward and backward by a projection 83 formed on the upper surface of the back plate 82 of the body lid 62.

On the slope 75 of the lock member 72, the container lid 6 is attached.
A protrusion 78 at the tip of a lock release lever 77 pivotally attached at the rear by a shaft 76 is in contact with the bearing 201 in the second bearing. The lock release lever 77 is the lock member 69.
When the spring 71 is advanced to the engagement position, it is pushed upward by the slope 75 via the protrusion 78, and the operation portion 79 at the tip end is moved from the upper surface opening 81 of the body lid 62 to the body lid 62. It is exposed so that it is flush with the surface of.

When the operating portion 79 is pushed down in this state, the lock release lever 77 is rotated counterclockwise and the projection 78
The sloping surface 75 of the lock member 69 is pushed by the lock member 69 against the spring 68, and the lock member 69 is retracted to disengage from the locking portion 72. Therefore, the lock of the body lid 62 in the closed state is released. At the time when this lock release is completed, there is a play in the unlocking direction between the lock release lever 77 and the body lid 62, and the body lid 62 is released from the pressing operation of the lock release lever 77. It is slightly rotated in the opening direction by the spring 68 regardless of whether it is performed or not.

As a result, the lock member 69 is slightly displaced upward from the position of the locking portion 72, so that the lock member 69 is again locked by the natural operation of releasing the lock and releasing the hand from the operating portion 79. The body lid 62 is automatically opened by the spring 68 to the fully opened state without being engaged with.

The lock release lever 77 has a safety member 111.
Is working. The safety member 111 is supported by the body lid 62 so as to be slidable in the longitudinal direction of the lock release lever 77. When the slide operation is performed by the operation portion 112, the locking portion 113 is advanced and retracted below the tip of the lock release lever 77, and when the lock release lever 77 is entering below the tip, the lock release lever 77 is prevented from moving downward, Prevents inadvertent unlocking.

The bearing member 64 is provided at the rear of the body lid 62.
A spring piece 84, which comes into pressure contact with the outer peripheral portion of, is attached by a screw 185. This spring piece 84 is in sliding contact with the outer periphery of the bearing member 64 when the container lid 62 is opened and closed, and exerts a brake on the opening operation when the container lid 62 is opened by the spring 68. Therefore, the automatic opening operation of the container lid 62 at the time of releasing the lock is performed slowly.

A metal inner lid 85 for closing the mouth of the inner container 2 is applied to the lower surface of the vessel lid 62, and is screwed at a position not shown. Between the outer periphery of the inner lid 85 and the back plate 82, there is a seal packing 86 facing the rim of the inner container 2.
When the body lid 62 is closed, the inner lid 8
The seal packing 86 is in contact with the rim of the inner container 2 to close the inner container 2.

A steam passage 87 is provided between the inner lid 85 and the back plate 82 to allow steam generated in the inner container 2 to escape to the outside. The steam passage 87 has an opening 88 to the inner container 2 side in the inner lid 85, and an opening 89 to the outside on the upper surface of the rear side of the vessel lid 62. A valve chamber 91 fitted to the back plate 82 from below is provided in the opening 88, and a fall axis stop valve 92 that is closed when the body 1 falls is provided in the valve chamber 91.

Control circuit 1 mounted on the circuit board 48
00 is the one using the microcomputer 101. The pouring operation key 202 provided on the operation panel 201 provided on the upper surface of the beak-shaped portion 12 is provided so as to press the pressure sensor 203, and the pressure sensor 203 detects the difference in pressing force during the pouring operation. By converting it into a dynamic signal and inputting it into the microcomputer 101 (FIG. 4), the drive voltage of the pouring pump is switched to control the pouring flow rate to increase or decrease.

A circulation path 311 for returning the content liquid into the inner container 2 is provided from the upper end of the inverted U-shaped bent portion of the pouring path 11.
Are branched and connected via a switching valve 312. The circulation path 311 is composed of a body side circulation path 311 a opening from the inside of the body 1 to the inner peripheral surface of the shoulder portion, and a lid side circulation path 311 b provided in the body lid 62.

The lid side circulation path 311b is connected so that when the vessel lid 62 is closed, the mouth packing 313 of the opening of the vessel lid side circulation path 311b and one end 314 face each other so as to be pressed and connected to each other. On the other hand, the other end 315 projects from the lower surface of the inner lid 85 and faces the inside of the inner container 2.

The switching valve 312 connects the pouring path 11 to the pouring pump 1
It is switched whether the content liquid sent out by 3 is guided to the discharge port 19 side or the circulation path 311 side.

As a result, the content liquid can be made to flow out from the pouring passage 11 to the discharge port 19 and can be poured out in accordance with the switching operation of the switching valve 312, and can be made to flow from the pouring passage 11 to the circulation passage 311. It can be returned into the inner container 2.

The flow of the content liquid flowing from the pouring path 11 to the circulation path 311 and returned to the inner container 2 can be circulated for a predetermined time by repeating this. In order to repeatedly purify this circulating content liquid, a purifying unit 316 is provided on the other end 315 side of the lid side circulation passage 311b.

As shown in FIG. 2, the purifying section 316 is a case 307 which is forcibly fitted into the opening 310 of the inner lid 85, and the purifying agent cartridge 309 which is detachably attached to the case 307 by the screw portion 308 is, for example, activated carbon 321 or the like. It contains a cleaning agent that can remove the odor and foreign substances.

The switching valve 312 is a solenoid valve, which is connected to the microcomputer 101 and is controlled at the same time as driving the pouring pump 13 so as to circulate the content liquid at a proper time or when a key operation for removing scaly is performed. I am doing it.

In the present embodiment, the term "timely" means that the temperature range of the content liquid, which is optimum in terms of the purification function of the purifying agent such as activated carbon, is reached, and the flow rate corresponds to the amount of the content liquid. At, the contents liquid is circulated and purified.

By such control, the circulation purification of the content liquid is controlled, and by the automatic control of the microcomputer 101, the temperature of the content liquid is in the temperature range in which trihalomethane is actively produced or in the optimum temperature range suitable for the type of the cleaning agent. As long as a predetermined temperature suitable for purification is reached, such as a temperature range in which the determination of the liquid amount based on the temperature rise characteristic obtained as the degree of temperature rise dT per unit time dt shown in the graph of FIG. 6 is stable. It can be carried out, and the circulation purification treatment can be performed without removing the optimum temperature range. Moreover, since the flow rate of the content liquid during circulation is set according to the liquid amount of the content liquid, a constant temperature of the constant liquid amount is utilized by utilizing the temperature rising time corresponding to the liquid amount until the temperature goes out of the predetermined temperature range. The content liquid can be circulated and purified.

Since the flow rate is controlled by controlling the drive voltage of the pouring pump 13 according to the amount of the content liquid, the flow rate control can be easily achieved.

Depending on the key operation for removing descaling, the circulation purification process is performed for a predetermined time set in advance. Therefore, when the user is not satisfied with the set time, the key operation for removing the descaling is performed again, so that the circulation purification can be repeated for a predetermined time and deal with.

The operation panel 201 is as shown in FIG. 3, and in addition to the pouring operation key 202, the re-boiling / scalping removal setting key 205, the timer setting key 206, the liquid amount display portion 207, the boiling / scaling removal, Insulation display units 208-2
10. Display units 211 to 213 for the timer set time are provided. Further, when the content liquid is in the boiling state or before and after it, or when the liquid level of the content liquid is below the lower limit of the pouring, pouring when controlling so as to prevent the pouring or the circulation purification process. , The pouring lock display section 215 of the circulation purification process,
It is provided with a pouring lock / release key 214 for temporarily locking or unlocking the pouring. Moreover, the purified water display part 21 which displays that it is in the purified water state.
6 is also provided.

The reboil / descaling removal setting key 205 and the pouring lock / release key 214 are set so that the setting mode is changed to a rotary type each time they are operated.

FIG. 4 shows a control circuit. In the microcomputer 131, as shown in the figure, the electric and electronic parts related to the various inputs and outputs are A / D converters 301 and 302, a switch circuit 303, a drive circuit 304, a display circuit. It is properly connected via 305.

Further, FIG. 5 is a flow chart of a concrete control when the circulation purification of the content liquid is performed.

This will be described. In the descaling processing routine, the liquid amount is always determined through the liquid amount detecting section 21, and when the descaling key is turned on, the user cleans the content liquid. In response to the intentional operation, the pump drive voltage is set to a large value so that the content liquid can be circulated at the maximum flow rate, and then the circulation timer is started until it ends. The solenoid valve 312 and the pouring pump 13 are operated to perform the operation, and the content liquid is circulated for a predetermined time so that the purification unit 316 purifies the content liquid.

Further, in the case of the initial boiling operation when the power is input or when the content liquid is replenished and the temperature reaches the required boiling point, the liquid is conditioned on the condition that the purification treatment start predetermined temperature T ₁ is reached. Read the quantity and determine if it is large, medium, or small.

When the liquid amount is large, the pump driving voltage is set to a small value, when the liquid amount is medium, the pump driving voltage is set to a medium amount, and when the liquid amount is small, the pump driving voltage is set to a large value. do it,
The circulating operation of the content liquid is performed at these set flow rates until the temperature reaches a predetermined temperature at the end of purification.

When the content liquid is replenished and the content liquid changes by a predetermined width or more, that is, when the content liquid is operated to boil, the correlation between the temperature and the liquid amount is complicated. The pump drive voltage is uniformly set to a large value regardless of the difference in the content liquid amount, and the circulation purification of the content liquid is performed until the purification end temperature is reached.

FIG. 6 shows an example of the relationship between the temperature change of the content liquid and various operations in such a case.

[0061]

According to the present invention, since the circulation purification of the content liquid is achieved within a predetermined temperature range of the content liquid, for example, a temperature range in which the removal target such as toyhalomethane of the content liquid in which the removal object is active and a purifying agent are active. It is possible to carry out circulation purification treatment without removing the optimum temperature range for the purification function or the temperature range in which the liquid amount of the content liquid can be stably determined. The flow rate during circulation is set according to the liquid amount of the content liquid, and the temperature rise time corresponding to the liquid amount until it goes out of the predetermined temperature range is used to circulate and purify the content liquid for the predetermined liquid amount. Therefore, the amount of the treatment content liquid and the number of treatments do not change, and a stable and sufficient purification function can be always exerted by simple control.

If the control means controls the flow rate by controlling the drive voltage of the pump according to the liquid amount of the content liquid, the flow rate control can be easily achieved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an electric pot showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a purification unit of the electric pot of FIG.

FIG. 3 is a plan view showing an operation panel of the electric pot of FIG.

FIG. 4 is a block diagram showing a control circuit of the electric pot of FIG.

FIG. 5 is a flow chart showing a specific example of the content of control for automatically circulating and purifying the content liquid of the electric pot of FIG.

6 is a graph showing an example of the relationship between the temperature of the content liquid and various control operations in the control of FIG.

[Explanation of symbols]

 1 Body 11 Outlet Path 13 Pump 21 Liquid Level Detection Unit 101 Microcomputer 311 Circulation Path 316 Purification Section

Claims (2)

[Claims] 1. A circulation path for guiding the content liquid in the body to the outside and then returning it to the body again, a pump for circulating the content liquid through this circulation path, and a part of the flow path of the circulated content solution. In a circulation purification type electric hot water storage container equipped with a purifying unit for purifying the content liquid circulated at the position of a purification agent, a purification start determination means for determining that the content liquid has reached a predetermined temperature for starting purification When there is a purification end judging means for judging that the content liquid has reached a predetermined temperature for finishing the purification, and when it is judged that it is the purification start predetermined temperature, the content liquid is kept until the purification end predetermined temperature is judged. A circulation purification type electric hot water storage container, which is provided with a control means for circulating the content liquid at a flow rate according to the liquid amount. 2. The circulation purifying type electric hot water container according to claim 1, wherein the control means controls the drive voltage of the pump according to the amount of the content liquid to control the flow rate.