JP2020083329A - Purified water server - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent purified water from leaking out by operating an electric pump in a state where purified water is cooled to a low temperature even in a place far from water supply and in a state where a purified water filter cartridge is not attached. Provide a possible purified water server. SOLUTION: A raw water tank 2 for storing raw water, an electric pump 5 for transferring raw water from the side of the raw water tank 2 to the side of a purified water filter cartridge 3, and a cooling device for cooling the purified water filtered by the purified water filter cartridge 3 to a low temperature. 7 and a cartridge detection unit 28 for detecting the presence / absence of the water purification filter cartridge 3, and when the cartridge detection unit 28 does not detect the water purification filter cartridge 3, the operation of the electric pump 5 is prohibited. [Selection diagram] Fig. 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a purified water server that uses raw water such as tap water after filtering with a replaceable purified water filter cartridge.

Conventionally, water servers have been mainly used in offices and hospitals, but in recent years, water servers are becoming widespread in general households due to increasing interest in water safety and health. Water servers generally include a housing, a replaceable water bottle set in the housing, a cold water tank for introducing water from the water bottle, and cold water poured from the cold water tank to the outside of the housing. It has an outlet for cold water, and by opening the cold water outlet valve provided in the cold water outlet pipe, it is possible to use delicious drinking water at an appropriate temperature immediately at any time, which has excellent convenience ( For example, Patent Document 1).

Here, as the exchangeable water bottle, the groundwater pumped up at the sampling site is used as raw water, and the bottle that has been subjected to heat sterilization treatment to fill the bottle (so-called natural water bottle) or tap water is used as the raw water. What is purified by a water filter of a water factory and filled in a bottle (so-called RO water bottle) is used.

JP, 2010-228807, A

The water bottle of the water server usually contains about 10 to 12 liters of drinking water and weighs 10 kg or more. In recent years, the delivery cost for delivering this water bottle has risen, and the economic burden on the user of the water server tends to increase.

Therefore, the inventor of the present application has an idea of adopting a purified water server in which raw water such as tap water is filtered and used by a replaceable water purification filter cartridge in order to solve the problem of the delivery cost of the water bottle of the water server. Obtained. Specifically, a raw water tank that stores domestic tap water as raw water, a replaceable water purification filter cartridge, a raw water pipe communicating between the raw water tank and the water purification filter cartridge, and an electric pump provided in the middle of the raw water pipe. And the idea of adopting a purified water server that has a cooling device that cools the purified water filtered by the purified water filter cartridge to a low temperature and a cold water spout pipe that pours out the low temperature purified water cooled by the cooling device to the outside. It was

Since this purified water server uses domestic tap water after filtering it with a purified water filter cartridge, it does not incur the delivery cost of the water bottle and can reduce the economical burden on the user.

Here, as a method of using tap water from a household by filtering it with a water purification filter cartridge, a method of directly connecting a general water purifier to a tap is conceivable. Since it is premised on installing in a place with a water supply (kitchen or hot water supply room) or its vicinity, selection of the installation place is greatly restricted. In addition, since it has no cooling function for cooling the purified water to a low temperature, it is inconvenient.

On the other hand, the purified water server with the above configuration temporarily stores tap water as raw water in the raw water tank and then feeds the raw water from the raw water tank to the purified water filter cartridge with an electric pump, so that there is a place where there is a tap (kitchen or hot water supply room). ), but also in a place far from the water (living room, waiting room, etc.). Moreover, there is an advantage that the purified water filtered by the purified water filter cartridge can be used in a state of being cooled to a low temperature at any time.

By the way, the above purified water server, when using the purified water filter cartridge for a certain period of time, or when the total amount of filtered water of the purified water filter cartridge reaches a certain amount, in order to maintain the purified water function of the purified water server, It is necessary to replace the water purification filter cartridge with a new one.

Here, when the user performs the replacement work of the water purification filter cartridge, after removing the water purification filter cartridge and operating the water purification water server before installing the new water purification filter cartridge, the water purification filter cartridge is not attached. The electric pump may continue to operate. Further, when the user installs a new water purification water server and forgets to attach the water purification filter cartridge, the electric pump may operate without the water purification filter cartridge being attached. If the electric pump operates without the water purification filter cartridge installed, the raw water sent from the electric pump leaks out from the raw water pipe, and the surface where the water purification water server is installed (such as the floor material of the user's house) is flooded. May be.

The problem to be solved by the present invention is that it is possible to use the purified water filtered by the purified water filter cartridge at a low temperature even in a place far from the water supply, and the electric pump without the purified water filter cartridge attached. It is to provide a purified water server that can prevent the raw water from leaking due to the operation of.

In order to solve the above problems, the present invention provides a purified water server having the following configuration.
A raw water tank for storing raw water,
Replaceable water filter cartridge,
A raw water pipe communicating between the raw water tank and the water purification filter cartridge;
An electric pump provided in the middle of the raw water pipe, for transferring raw water from the side of the raw water tank to the side of the water purification filter cartridge,
A cooling device for cooling the purified water filtered by the water purification filter cartridge to a low temperature,
A cold water spouting pipe for pouring out low temperature purified water cooled by the cooling device to the outside,
A cartridge detection unit for detecting the presence or absence of the water purification filter cartridge,
A pump control device for controlling the operation of the electric pump,
The pump control device allows the operation of the electric pump only when the cartridge detection unit detects the water purification filter cartridge, and prohibits the operation of the electric pump when the cartridge detection unit does not detect the water purification filter cartridge. A pump operation prohibition control means for
Purified water server.

This purified water server stores raw water in a raw water tank once and sends the raw water from the raw water tank to the purified water filter cartridge using an electric pump, so there is no need to connect it directly to the water supply, and it can be used in a place far from the water supply. In addition, since the purified water filtered by the water purification filter cartridge can be used in a state of being cooled to a low temperature by the cooling device, it has excellent convenience. In addition, the operation of the electric pump is allowed only when the cartridge detection unit detects the water purification filter cartridge, and the operation of the electric pump is prohibited when the cartridge detection unit does not detect the water purification filter cartridge. It is possible to prevent the raw water from leaking out by operating the electric pump when not in use, and to prevent the installation surface of the purified water server (floor material of the user's house, etc.) from getting wet.

It is preferable that the raw water tank is detachably provided.

In this way, the raw water tank can be removed and carried to a place where there is a water supply, which facilitates the water supply work of the raw water tank and further enhances the convenience.

This purified water server preferably has the following configuration.
The water purification filter cartridge is formed in a bottomed cylindrical shape with one end open and the other end closed.
In the cartridge housing space for housing the water purification filter cartridge, a cartridge head to which the one end of the water purification filter cartridge is detachably connected is provided,
In the cartridge head, the water purification filter cartridge is provided between a cartridge use position where the water purification filter cartridge is parallel to an inner wall of the cartridge housing space and a cartridge exchange position where the water purification filter cartridge is inclined in a direction away from the inner wall. It is rotatably supported to swing,
The cartridge detection unit does not detect the water purification filter cartridge when the water purification filter cartridge is in the cartridge exchange position, and detects the water purification filter cartridge when the water purification filter cartridge is in the cartridge use position. It is arranged.

With this configuration, even when the water purification filter cartridge is attached to the cartridge head, if the water purification filter cartridge is swung from the cartridge use position to the cartridge exchange position, the operation of the electric pump is prohibited and the water purification filter cartridge is replaced with the cartridge. The electric pump will not operate unless it is rocked from the replacement position to the cartridge use position. Therefore, it is possible to prevent the water purification filter cartridge from being removed while the electric pump is still operating, or the electric pump from starting to operate during the process of attaching the water purification filter cartridge.

In this case, it is preferable to further provide a cartridge holder that holds the water purification filter cartridge when the water purification filter cartridge is moved from the cartridge replacement position to the cartridge use position and restricts swinging of the water purification filter cartridge.

With this configuration, when the water purification filter cartridge is swung from the cartridge replacement position to the cartridge use position, the water purification filter cartridge is held by the cartridge holder and the water purification filter cartridge is positioned, so that the water purification filter cartridge by the cartridge detection unit is used. The detection accuracy of can be stabilized.

As the cartridge detector, a push switch having a slidably supported plunger is adopted, and the push switch is swung from the cartridge replacement position to the cartridge use position when the water filter cartridge is swung. It can be provided on the inner wall of the cartridge housing space so that the plunger is pushed in by contact with the outer periphery of the cartridge.

With this configuration, it is possible to reliably detect the water purification filter cartridge with the low-cost cartridge detection unit.

The purified water server can be added with the following configurations.
Reserving the purified water filtered by the water purification filter cartridge, a cold water tank to which the cooling device is attached,
Further comprising a water level sensor for detecting the water level in the cold water tank,
The pump control device has a water level control means for operating the electric pump when it is determined that the water level in the cold water tank is below a lower limit water level based on the output signal of the water level sensor,
Even when the water level control means determines that the water level in the cold water tank is below the lower limit water level, the pump operation prohibition control means does not detect the water purification filter cartridge by the cartridge detection section, and the electric pump Is configured to be prohibited.

In this way, when the water level in the cold water tank falls below the lower limit water level during the replacement work of the water purification filter cartridge, or when the water level in the cold water tank falls below the lower limit water level, the replacement work of the water purification filter cartridge can be performed. Since the operation of the electric pump is prohibited when the operation is performed, it is possible to reliably prevent leakage of raw water due to the operation of the electric pump.

The purified water server of the present invention stores raw water in a raw water tank once and feeds the raw water from the raw water tank to the purified water filter cartridge using an electric pump, so that it does not need to be directly connected to the water supply and can be used in a place far from the water supply. In addition, the purified water filtered by the purified water filter cartridge can be used in a state of being cooled to a low temperature by the cooling device, which is excellent in convenience. In addition, the operation of the electric pump is allowed only when the cartridge detection unit detects the water purification filter cartridge, and the operation of the electric pump is prohibited when the cartridge detection unit does not detect the water purification filter cartridge. It is possible to prevent the raw water from leaking out by operating the electric pump when not in use, and to prevent the installation surface of the purified water server (floor material of the user's house, etc.) from getting wet.

Sectional drawing which shows typically the purified water server of embodiment of this invention. Enlarged sectional view taken along line II-II of FIG. Enlarged sectional view taken along line III-III in FIG. FIG. 1 is a view in the vicinity of a cartridge head showing a state in which the water purification filter cartridge of FIG. FIG. 4 is a view of the vicinity of the cartridge head showing a state where the water purification filter cartridge of FIG. 4 is removed from the cartridge head. Block diagram showing the configuration of the control system of the electric pump of FIG. Flow chart showing a control example by the pump control device shown in FIG.

FIG. 1 shows a purified water server according to an embodiment of the present invention. This purified water server includes a casing 1, a raw water tank 2 for storing raw water, an exchangeable purified water filter cartridge 3, a raw water pipe 4 communicating between the raw water tank 2 and the purified water filter cartridge 3, and a raw water pipe 4. Of the electric pump 5, the cold water tank 6 that stores the purified water filtered by the purified water filter cartridge 3, the cooling device 7 that cools the purified water in the cold water tank 6, the purified water filter cartridge 3 and the cold water tank 6. It has a purified water pipe 8 that communicates with each other and a cold water spout pipe 9 that spouts low temperature purified water in the cold water tank 6 cooled by the cooling device 7 to the outside of the housing 1.

The raw water tank 2 is detachably attached to the housing 1. The housing 1 has a cylindrical wall 10 extending in the vertical direction, a top plate 11 provided at the upper end of the cylindrical wall 10, and a bottom plate 12 provided at the lower end of the cylindrical wall 10. The top plate 11 of the housing 1 is provided with a tank housing recess 13 for housing the raw water tank 2. A raw water inlet 14 is provided at the upstream end of the raw water pipe 4 on the inner surface of the tank housing recess 13.

The raw water tank 2 includes a tank main body 15 that stores raw water, and a lid 16 that opens and closes an opening for water supply formed in the tank main body 15. Both the tank main body 15 and the lid 16 are made of resin. The tank body 15 has a tank opening/closing valve 17 at a position corresponding to the raw water inlet 14 when the raw water tank 2 is attached to the tank housing recess 13. The tank opening/closing valve 17 blocks communication between the inside and outside of the raw water tank 2 when the raw water tank 2 is removed from the tank housing recess 13, and when the raw water tank 2 is attached to the tank housing recess 13, the tank opening/closing valve 17 Is an on-off valve that connects the inside of the to the raw water inlet 14.

The electric pump 5 includes an electric motor 18 and a pump portion 19 driven by the electric motor 18. As the pump portion 19, for example, a gear pump or a diaphragm pump can be adopted. The electric pump 5 sucks the raw water from the side of the raw water tank 2 and discharges the raw water to the side of the clean water filter cartridge 3 to move the raw water in the raw water pipe 4 from the side of the raw water tank 2 to the side of the clean water filter cartridge 3. Transfer to.

The cold water tank 6 contains air and purified water filtered by the purified water filter cartridge 3 in upper and lower layers. A cooling device 7 that cools the purified water in the cold water tank 6 is attached to the cold water tank 6. The purified water in the cold water tank 6 is kept at a low temperature (about 5° C.) by the cooling device 7. The cooling device 7 may be attached to the outer circumference of the cold water tank 6 or may be attached to the inside of the cold water tank 6. The downstream end of the water purification pipe 8 is connected to the upper surface of the cold water tank 6 so that the purified water filtered by the water purification filter cartridge 3 flows into the cold water tank 6. A water level sensor 20 that detects the water level in the cold water tank 6 is attached to the cold water tank 6.

A cold water outlet pipe 9 is connected to the bottom surface of the cold water tank 6. The cold water discharge pipe 9 is provided with a cold water discharge valve 21 that can be operated from the outside of the housing 1. By opening the cold water discharge valve 21, low temperature purified water can be discharged from the cold water tank 6 to a cup or the like. It is like this. The cold water pouring valve 21 may be a manual opening/closing valve that is opened/closed by a user's manual operation, or may be an electromagnetic opening/closing valve that is opened/closed by switching between energization and interruption by a user's external operation.

The water purification filter cartridge 3 is housed in a cartridge housing space 22 that opens to the front surface of the housing 1. The cartridge housing space 22 can be opened and closed by a cover door (not shown). The water purification filter cartridge 3 is formed in a bottomed cylinder shape having an open upper end and a closed lower end. At the upper end of the water purification filter cartridge 3, a raw water inlet and a water purification outlet (not shown) are provided.

As shown in FIG. 2, inside the water purification filter cartridge 3, a water purification filter 23 for filtering the raw water into purified water, a raw water introduction path 24 for guiding the raw water from the raw water inlet to the water purification filter 23, and the water purification filter 23 for purifying the water. A purified water outlet 25 for guiding purified water is provided at the outlet. As the water purification filter 23, an activated carbon filter, a hollow fiber membrane filter, or a combination of both can be adopted.

As shown in FIG. 1, the cartridge housing space 22 is provided with a cartridge head 26 to which the upper end of the water purification filter cartridge 3 is connected. The cartridge head 26 is rotatably supported around a horizontal axis, and the water purification filter cartridge 3 is parallel to an inner wall 27 extending in the up-down direction of the cartridge housing space 22 with the rotation of the cartridge head 26. The water purification filter cartridge 3 can be swung between a use position (see FIG. 1) and a cartridge exchange position (see FIG. 4) in which the water purification filter cartridge 3 is inclined in a direction away from the inner wall 27.

As shown in FIG. 5, the upper end of the water purification filter cartridge 3 is attachable to and detachable from the cartridge head 26. Specifically, the top end of the water purification filter cartridge 3 is removed from the cartridge head 26 by rotating the water purification filter cartridge 3 around the cylinder axis of the water purification filter cartridge 3 and pulling out the top end of the water purification filter cartridge 3 from the cartridge head 26. Is possible. Further, by inserting the upper end of the water purification filter cartridge 3 into the cartridge head 26 and rotating the water purification filter cartridge 3 around the cylinder axis of the water purification filter cartridge 3, the upper end of the water purification filter cartridge 3 can be attached to the cartridge head 26. Has become.

As shown in FIGS. 1 and 2, the inner wall 27 of the cartridge housing space 22 is provided with a cartridge detection unit 28 that detects the presence or absence of the water purification filter cartridge 3. The cartridge detection unit 28 is a push switch having a plunger 29 slidably supported between a protruding position (see FIG. 4) protruding from the inner wall 27 and a pushing position (see FIG. 1) pushed into the inner wall 27. is there. The push switch has an inner wall so that the plunger 29 is pushed in by contact with the outer periphery of the water purification filter cartridge 3 when the water purification filter cartridge 3 swings from the cartridge exchange position (see FIG. 4) to the cartridge use position (see FIG. 1). 27. The plunger 29 is biased by a spring (not shown) so as to return to the projecting position when the water purification filter cartridge 3 swings from the cartridge use position (see FIG. 1) to the cartridge exchange position (see FIG. 4).

The cartridge detection unit 28 does not detect the water purification filter cartridge 3 when the water purification filter cartridge 3 is at the cartridge replacement position (see FIG. 4 ), and when the water purification filter cartridge 3 is at the cartridge use position (see FIG. 1 ), It is arranged to detect the water purification filter cartridge 3.

As shown in FIGS. 1 and 3, a cartridge holder 30 is provided on the inner wall 27 of the cartridge housing space 22. As shown in FIG. 3, in this embodiment, the cartridge holder 30 has an elastically deformable C-shaped portion 31 in which a part of a cylinder is cut out, and extends radially outward from both ends of the C-shaped portion 31. It has a guide piece portion 32 that extends and a mounting portion 33 that fixes the C-shaped portion 31 to the inner wall 27, and the water purification filter cartridge 3 is received in the C-shaped portion 31. The cartridge holder 30 elastically holds the outer periphery of the water purification filter cartridge 3 when the water purification filter cartridge 3 is moved from the cartridge replacement position (see FIG. 4) to the cartridge use position (see FIG. 1), and the water purification filter cartridge 3 rocking is regulated.

The operation of the electric pump 5 is controlled by the pump control device 34 shown in FIG. A signal indicating the water level in the cold water tank 6 is input to the pump control device 34 from the water level sensor 20, and a signal indicating the presence or absence of the water purification filter cartridge 3 is input from the cartridge detection unit 28. A control signal for driving the electric pump 5 is output from the pump control device 34.

A control example of the pump control device 34 will be described.

As shown in FIG. 7, when it is determined that the water level in the cold water tank 6 is below the lower limit water level based on the output signal of the water level sensor 20 (step S ₁ ), the electric pump 5 is operated (step S ₃ ). When the cartridge detection unit 28 does not detect the water purification filter cartridge 3 (step S ₂ ), even when it is determined that the water level in the cold water tank 6 is below the lower limit water level (step S ₁ ), the electric pump 5 Is prohibited (step S ₄ ).

Here, the pump control device 34 performs water level control for operating the electric pump 5 when it is determined that the water level in the cold water tank 6 is below the lower limit water level (steps S ₁ , S ₃ , S ₄ ), and at the same time, the cartridge The operation of the electric pump 5 is allowed only when the water purifying filter cartridge 3 is detected by the detection unit 28 (steps S ₂ and S ₃ ), and the electric pump 5 is operated when the water purifying filter cartridge 3 is not detected by the cartridge detection unit 28. The pump operation prohibition control for prohibiting is performed (steps S ₂ and S ₄ ).

Since this purified water server temporarily stores the raw water in the raw water tank 2 and sends the raw water in the raw water tank 2 to the purified water filter cartridge 3 using the electric pump 5, there is no need to directly connect to the water supply, and a place far from the water supply. It can also be used in a living room or a waiting room, for example, and since the purified water filtered by the purified water filter cartridge 3 can be used while being cooled to a low temperature by the cooling device 7, it has excellent convenience. ..

By the way, when the water purification filter cartridge 3 is used for a certain period of time or when the total amount of filtered water of the water purification filter cartridge 3 reaches a certain amount, in order to maintain the water purification function of the water purification water server, the water purification filter cartridge 3 is installed. It is necessary to replace it with a new one. Here, when the user replaces the water purification filter cartridge 3, after removing the water purification filter cartridge 3 and operating the water purification water server before installing the new water purification filter cartridge 3, the water purification filter cartridge 3 is attached. There is a risk that the electric pump 5 will operate in a state where it is not turned on. Further, when the user installs a new water purification water server and forgets to attach the water purification filter cartridge 3, the electric pump 5 may operate without the water purification filter cartridge 3 being attached. When the electric pump 5 operates without the water purification filter cartridge 3 attached, the raw water sent from the electric pump 5 leaks out from the raw water pipe 4 and the surface of the water purification water server (the floor material of the user's house) Etc.) may be flooded.

Regarding this problem, this purified water server allows the electric pump 5 to operate only when the cartridge detector 28 detects the purified filter cartridge 3, and the electric pump 5 when the cartridge detector 28 does not detect the purified filter cartridge 3. Since the operation of the water purifier is prohibited, it is possible to prevent the electric pump 5 from operating and the raw water from leaking out when the water purifying filter cartridge 3 is not attached. Material) can be prevented from getting wet with water.

To supply water to the raw water tank 2, open the lid 16 of the raw water tank 2 with the raw water tank 2 still attached to the tank accommodating recess 13 and pour tap water into the raw water tank 2 from a container such as a kettle in that state. It is possible to put it in, but since this raw water tank 2 is detachably provided in this purified water server, the raw water tank 2 can be removed and carried to a place with a water supply. Therefore, the water supply work of the raw water tank 2 is easy and excellent in convenience.

Further, in this purified water server, even when the purified water filter cartridge 3 is attached to the cartridge head 26, the purified water filter cartridge 3 is swung from the cartridge use position (see FIG. 1) to the cartridge exchange position (see FIG. 4). Then, the operation of the electric pump 5 is prohibited, and the electric pump 5 does not operate unless the water purification filter cartridge 3 is swung from the cartridge exchange position (see FIG. 4) to the cartridge use position (see FIG. 1). Therefore, it is possible to prevent the water purification filter cartridge 3 from being removed while the electric pump 5 is still operating, or the electric pump 5 from starting to operate during the process of attaching the water purification filter cartridge 3.

Further, in this purified water server, when the purified water filter cartridge 3 is swung from the cartridge exchange position (see FIG. 4) to the cartridge use position (see FIG. 1), the purified water filter cartridge 3 is held by the cartridge holder 30, Since the water purification filter cartridge 3 is positioned, the detection accuracy of the water purification filter cartridge 3 by the cartridge detection unit 28 is stable.

Further, in this purified water server, the low-cost cartridge detection unit 28 can reliably detect the purified water filter cartridge 3. That is, as the cartridge detection unit 28, for example, a photoelectric sensor that projects light toward the outer periphery of the water purification filter cartridge 3 and detects the presence or absence of the water purification filter cartridge 3 based on the reflected light may be adopted. A capacitance type proximity sensor that detects the presence or absence of the water purifying filter cartridge 3 based on a change in capacitance when the three approach each other may be adopted. However, in the above embodiment, the cartridge detecting unit 28 is slidable. Since the push switch having the plunger 29 supported by is used, it is possible to reliably detect the water purification filter cartridge 3 with the low-cost cartridge detection unit 28.

In addition, this purified water server purifies water when the water level in the cold water tank 6 falls below the lower limit water level during replacement of the purified water filter cartridge 3 or when the water level in the cold water tank 6 falls below the lower limit water level. Since the operation of the electric pump 5 is prohibited when the filter cartridge 3 is replaced, it is possible to reliably prevent leakage of raw water due to the operation of the electric pump 5.

The embodiments disclosed this time are to be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description but by the claims, and is intended to include meanings equivalent to the claims and all modifications within the scope.

2 Raw Water Tank 3 Water Purification Filter Cartridge 4 Raw Water Pipe 5 Electric Pump 6 Cold Water Tank 7 Cooling Device 9 Cold Water Outlet Pipe 20 Water Level Sensor 22 Cartridge Housing Space 26 Cartridge Head 27 Inner Wall 28 Cartridge Detecting Unit 29 Plunger 30 Cartridge Holder 34 Pump Control Device

Claims (6)

A raw water tank (2) for storing raw water,
Replaceable water filter cartridge (3),
A raw water pipe (4) communicating between the raw water tank (2) and the water purification filter cartridge (3);
An electric pump (5) provided in the middle of the raw water pipe (4) for transferring raw water from the side of the raw water tank (2) to the side of the water purification filter cartridge (3);
A cooling device (7) for cooling the purified water filtered by the purified water filter cartridge (3) to a low temperature;
A cold water discharge pipe (9) for discharging the low temperature purified water cooled by the cooling device (7) to the outside,
A cartridge detection unit (28) for detecting the presence or absence of the water purification filter cartridge (3),
A pump control device (34) for controlling the operation of the electric pump (5),
The pump control device (34) permits the operation of the electric pump (5) only when the water purification filter cartridge (3) is detected by the cartridge detection unit (28), and the cartridge detection unit (28) performs the operation. A pump operation prohibition control means (S ₂ , S ₄ ) for prohibiting the operation of the electric pump (5) when the water purification filter cartridge (3) is not detected,
Purified water server. The purified water server according to claim 1, wherein the raw water tank (2) is detachably provided. The water purification filter cartridge (3) is formed in a bottomed cylindrical shape with one end open and the other end closed.
A cartridge head (26) to which the one end of the water purification filter cartridge (3) is detachably connected is provided in a cartridge accommodation space (22) that accommodates the water purification filter cartridge (3).
The cartridge head (26) has a cartridge use position where the water purification filter cartridge (3) is parallel to the inner wall (27) of the cartridge housing space (22), and the water purification filter cartridge (3) is the inner wall (27). The water purification filter cartridge (3) is rotatably supported so as to oscillate between a cartridge exchange position inclined in a direction away from
The cartridge detection unit (28) does not detect the water purification filter cartridge (3) when the water purification filter cartridge (3) is in the cartridge exchange position, and the water purification filter cartridge (3) is in the cartridge use position. In some cases, it is arranged to detect the water purification filter cartridge (3),
The purified water server according to claim 1 or 2. A cartridge holder that holds the water purification filter cartridge (3) when the water purification filter cartridge (3) is moved from the cartridge replacement position to the cartridge use position and restricts swinging of the water purification filter cartridge (3) ( The purified water server according to claim 3, further comprising 30). The cartridge detection unit (28) is a push switch having a plunger (29) slidably supported, and the push switch swings the water purification filter cartridge (3) from the cartridge exchange position to the cartridge use position. The inner wall (27) of the cartridge housing space (22) is provided so that the plunger (29) is pushed in by contact with the outer circumference of the water purification filter cartridge (3) when moved. Purified water server described in. A cold water tank (6) storing the purified water filtered by the water purification filter cartridge (3) and having the cooling device (7) attached;
A water level sensor (20) for detecting the water level in the cold water tank (6),
The pump controller (34) operates the electric pump (5) when it determines that the water level in the cold water tank (6) is below the lower limit water level based on the output signal of the water level sensor (20). Having control means (S ₁ , S ₃ , S ₄ ),
When the pump operation prohibition control means (S ₂ , S ₄ ) determines that the water level in the cold water tank (6) is below the lower limit water level by the water level control means (S ₁ , S ₃ , S ₄ ). Also, when the cartridge detector (28) does not detect the water purification filter cartridge (3), the operation of the electric pump (5) is prohibited.
The purified water server according to any one of claims 1 to 5.

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