KR20050048943A - Water dispenser - Google Patents

Abstract

The present invention relates to a cold and hot water purifier capable of measuring the level of water and pollution.

Cold and hot water purifier according to the present invention, the outer body is formed by the main body case, the heat exchange system is provided with a main body 100 therein; A water reservoir 200 provided on an upper portion of the main body 100 and made of polycarbonate; Water level sensing means for sensing the water level inside the water reservoir 200; Pollution detecting means for measuring a pollution degree of water stored in the water reservoir 200; A solenoid valve 300 for selectively opening and closing the water supply pipe 230 which is a passage through which water is supplied to the water reservoir 200; It has a configuration including a control unit 340 for controlling the solenoid valve 300 to open and close according to the information provided from the water level detection means and the pollution detection means. The water level detecting means shields the water supply pipe 230 when the water level of the water reservoir 200 reaches the maximum storage level, and opens the water supply pipe 230 when the water level reaches the minimum storage level. According to the present invention, since the degree of contamination of the water is sensed, the user has the advantage of always drinking clean water.

Description

Cold Water Purifier {Water dispenser}

The present invention relates to a cold and hot water purifier, and more particularly, to a cold and hot water purifier configured to automatically open and close a supply passage of water supplied to a water storage container by measuring a water level and a pollution level of the water storage container.

Apparatuses for supplying drinking water for human drinking have recently been provided in various forms, and in FIG. 1, a typical cold / hot water machine, which is an example of such a drinking water supply apparatus, is schematically illustrated.

According to this, the outer case 10 constituting the appearance is formed, the top of the outer case 10 is provided with a cover 12, the bottled water 14 is placed on the upper surface of the cover 12 Loses.

Inside the outer case 10, the cold water tank 20 and the hot water tank 22 are formed to communicate with the connecting tube 24, the evaporator 26 is formed along the outer circumferential surface of the cold water tank 20. To pipe is wound. And, the heater 28 is inserted into the hot water tank 22 is provided, the cold and hot water extraction coke 30 is provided on the outer side of the outer case 10.

The cold water tank 20 and the hot water tank 22 are connected to the cold and hot water extraction coke 30 through the connection hose (32). As a result, the water stored in the cold water tank 20 and the hot water tank 22 may move along the connection hose 32 to be taken out through the cold and hot water extraction coke 30.

In addition, the water in the bottled water bottle 14, the hot water tank 22 and the connection hose 32 is maintained at a constant water temperature by the heat insulating member 34 in the outer case (10). On the other hand, the cooling water tank 20 and the lower portion of the hot water tank 22 is equipped with the remaining cooling system (not shown) for supplying a refrigerant of a constant temperature to the evaporator 26 pipe.

Since such a cooling system is composed of a general refrigeration cycle, a detailed description thereof will be omitted. The cooling system and the heater 28 are mechanically or electronically controlled by respective temperature sensors (not shown) to maintain the water in the cold water tank 20 and the hot water tank 22 at a predetermined temperature. .

In the conventional cold and hot water machine, the bottled water bottle 14 is seated on the top cover 12 of the outer case 10 so that the inlet portion thereof faces downward. In this case, water inside the bottled water 14 flows down to fill the cold water container 20.

On the other hand, the water in the cold water tank 20 is moved through the connecting pipe 24 is also filled in the hot water tank 22. As such, the water filled in the cold water tank 20 and the hot water tank 22 is maintained at a constant temperature in the evaporator 26 and the heater 28, respectively.

In the cold and hot water heater having the configuration as described above, the user can simply push the cold and hot water extraction cock 30 to the rear to extract and drink the desired amount of water. At this time, the amount of water corresponding to the water taken out through the cold and hot water extraction coke 30 is supplied from the bottled water bottle 14 to the cold water tank 20 and the hot water tank 22 by its own weight.

If the water in the bottle 14 by the repetition of this process, when the bottled water 14 is stored in the upper portion of the outer case 10 again to the inlet portion downwards, as described above The user can supply drinking water.

On the other hand, without using the bottled water bottle 14 as described above is also configured to be supplied to the user after the tap water is purified through the water filter. That is, when water purified from the outside is supplied to the inner storage container, the user can take it out and drink it.

Figure 2 is a partial cross-sectional view of the configuration in which the purified water is supplied to the reservoir. That is, a state in which purified water supplied from an external water purifier (not shown) is supplied to the water reservoir 40 is illustrated.

As shown therein, a water reservoir 40 having a storage space formed therein is provided, and a cover 42 is provided at an upper end of the water reservoir 40 to shield the upper portion of the water reservoir 40.

The cover 42 is installed so that the water supply pipe 44 penetrates up and down. In addition, the bottom surface of the cover 42 corresponding to the lower end of the water supply pipe 44 is further formed so that the bulge support 46 is supported by the boom 50 to be described below. In addition, an opening and closing member 48 for selectively opening and closing the water supply pipe 44 is inserted into the plunger support part 46.

On the other hand, the lower portion of the cover 42 is provided with a float 50 floating in water. One end of the plunger 50 has a link 52 extending from the plunger 50 to the plunger support 46 as shown.

In the configuration as described above, since the pour 50 is floating in water, when the water level is lowered, the pour 50 is lowered downward, and the opening and closing member 48 is subsequently lowered. In this case, the water supply pipe 44 is opened so that water is supplied into the water reservoir 40 from the outside.

In addition, when water is supplied through the water supply pipe 44 to increase the water level, the bag 50 rises upward. In this case, the opening and closing member 48 also rises upward to open the water supply pipe 44. Shielding.

However, the above-described prior art has the following problems.

In the configuration as described above, according to the water level of the water reservoir (40) is opened and closed the water supply pipe (44) while moving the upholstery 50 up and down. That is, since the water supply pipe 44 is opened and closed by a mechanical configuration so that water is supplied, there is a problem in that it is not precise and does not work when foreign matter is caught between the parts.

In addition, the purified water in the configuration as described above is supplied to the water reservoir 40 is taken out so that the user can drink, it can be detected when the water temporarily stored in the water reservoir 40 is contaminated There is no problem.

That is, water is purified from a water purifier (not shown) to be supplied to the water reservoir 40, but if the water is not properly purified from the external water purifier, the user cannot detect the contaminated water. There is a problem with drinking.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and to automatically detect the water level of the water reservoir provided in the cold / hot water purifier so that water is automatically supplied.

It is another object of the present invention to provide a cold / hot water purifier in which water is supplied depending on the degree of contamination of water stored in the water reservoir.

Cold and hot water purifier according to the present invention for achieving the above object, the body is formed by the body case, the heat exchange system is provided inside; It is provided on one side of the main body, the water reservoir for storing water therein; Water level sensing means for sensing the water level of the water reservoir; Pollution detection means for measuring a pollution degree of water stored in the water reservoir; A water purifier for supplying water to the water reservoir by purifying water supplied from the outside; A water supply pipe that becomes a passage through which the water passing through the water purifier is supplied to the water reservoir; Water supply pipe opening and closing means for selectively opening and closing the water supply pipe; And a control unit for controlling the water supply pipe opening and closing means to selectively open and close the water supply pipe according to the information provided from the water level detecting means.

The water reservoir is made of polycarbonate.

The lower end of the water reservoir is characterized in that the sealing member is further provided to prevent the leakage of water.

The lower end of the water reservoir is formed to be stepped to prevent the flow of the sealing member.

The water level sensing means includes a high water level sensing means for sensing the maximum storage level of the water reservoir, and a low water level sensing means for sensing the minimum storage level of the water reservoir; The water supply pipe opening and closing means, when the water level of the water reservoir reaches the maximum storage level, and shields the water supply pipe, and when the water level of the water reservoir reaches the minimum storage level, characterized in that for opening the water supply pipe.

One side of the water reservoir is characterized in that it is further provided with an air filter for filtering the air (air) coming in and out of the water reservoir.

One end of the water supply pipe is formed extending into the water reservoir is characterized in that the water flowing into the water reservoir guides to be sprayed upward.

According to the cold / hot water purifier according to the present invention having such a configuration, since the degree of contamination of the water is detected and the pollution is severe, the water supply is cut off, so that the user can always drink clean water.

Hereinafter, exemplary embodiments of the present invention as described above will be described in detail with reference to the accompanying drawings.

3 is a front view of the cold / hot water purifier according to the present invention, and FIG. 4 is a schematic configuration of the cold / hot water purifier according to the present invention. And, Figure 5 shows a water reservoir that is a main component of the cold / hot water purifier according to the present invention, Figure 6 shows an air filter as a main component of the cold / hot water purifier according to the present invention.

As shown in these drawings, the main body 100 of the cold / hot water purifier has an exterior formed by the main body case 110, and the heat exchange system 120 is provided therein. Since the configuration and operation of the heat exchange system 120 is generally known, a detailed description thereof will be omitted.

The water extraction unit 130 is formed on the front surface of the main body 100. The water extraction unit 130 is formed by recessing a predetermined portion from the front of the body case 110 to the rear, and the water extraction unit 130 is provided with an outlet 132 which is an outlet through which water is drawn out. The outlet 132 is generally provided in parallel with the hot water outlet 132 ′ for taking hot water and the cold water outlet 132 ″ for taking cold water, and a lever 134 is further provided at the rear of the outlet 132. do.

The upper portion of the main body 100 is mounted with a water reservoir 200 in which water is stored. The water reservoir 200 is preferably formed of a polycarbonate (Polycarbonate) material, the bottom is opened so that the water inside is moved to the main body 100 is drawn out to the outside through the outlet 132.

The upper end of the water reservoir 200 is provided with an air pipe 210. It is installed to communicate with the water reservoir 200 inside the air pipe 210 so that the upper surface of the water stored in the water reservoir 200 to the atmospheric pressure. That is, since the water reservoir 200 is sealed, when the water level inside the water reservoir 200 is lowered, the pressure in the water reservoir 200 is lowered, making it difficult to extract water through the outlet 132.

In addition, on the contrary, when the water in the water reservoir 200 becomes a high water level from the low water level, that is, the external water is supplied into the water reservoir 200 through the water supply pipe 230 to be described below. If the reservoir 200 is sealed, it is difficult to supply water. As such, the air pipe 210 allows the inner top and the outside of the water reservoir 200 to communicate with each other so as to facilitate the access of the water into the water reservoir 200.

Therefore, one end of the air pipe 210 is preferably installed to contact one surface of the water reservoir 200, the upper end of the high water level sensor 222 to be described in more detail below, the other end is extended to the outside An air filter 212 is further provided at the end.

When the outside air is supplied to the water supply pipe 230 from the outside through the air pipe 210 from the outside, the air filter 212 filters the foreign matter in the air, the water in the water supply pipe 230 is the foreign matter in the air To prevent contamination by

The air filter 212 is formed in a substantially rectangular shape is inserted into the filter case 212 'formed at one end of the air pipe 210. The filter case 212 ′ is composed of two rectangular flat plates corresponding to the air filter 212, and the air filter 212 is inserted and fixed between both rectangular flat plates.

In addition, a plurality of guide ribs 212 ″ are formed on the inner surface of the filter case 212 ′ to fix the air filter 212 and guide the flow of inflowing air. A plurality of radially formed in the case 212 ′, and the guide ribs 212 ″ are configured to communicate with each other to allow air to travel.

Therefore, the air flowing from the front inlet of the air pipe 210 is distributed in the filter case 212 ′ and passes through the air filter 212. Therefore, since a large amount of air passes through the air filter 212 at the same time, the intake and discharge of air into the water supply pipe 230 is facilitated.

The water supply end 240 is formed to protrude downward in the lower center portion of the water reservoir 200, the water supply end 240 is made of a cylindrical shape that is open inside. Therefore, water inside the water reservoir 200 is introduced into the main body 100 through the water supply terminal 240.

A central portion of the outer circumferential surface of the water supply stage 240 is formed stepped. Therefore, a sealing member 250 is provided at the stepped portion 242 at the bottom of the water supply pipe 230 to prevent external leakage of water. That is, the sealing member 250 is made of a circular elastic material is fitted to the step portion 242.

Therefore, when the water reservoir 200 is erected on the upper side of the main body 100, the water supply end 240 is accommodated in the water supply port 150 formed in the upper center portion of the main body 100, the sealing The member 250 is to prevent the leakage of water through the gap between the water supply pipe 230 and the water supply port 150.

On the other hand, when the water reservoir 200 is mounted on the upper surface of the main body 100, the sealing member 250 is inserted into the water supply end 240, the sealing member 250 is the step portion Since it is fitted to 242, it is impossible to flow upward by the stepped surface.

The rear surface of the water reservoir 200 is provided with a water level detection means. The water level detecting means has a configuration including a plurality of water level sensors. That is, a plurality of water level sensors 222 and 224 are provided at the rear of the water reservoir 200, and an upper portion thereof is provided with a high water level sensor 222 for detecting a maximum storage level of water, and a lower portion of the water level sensor 222 is provided with water. The low water level sensor 224 is provided to detect a minimum storage level of water stored in the storage container 200.

The reference sensor 226 is provided between the high water level sensor 222 and the low water level sensor 224. The reference sensor 226 is coupled to the high water level sensor 222 and the low water level sensor 224 to transfer the water level of the water reservoir 200 to the control unit 340 to be described below to open and close the water supply pipe.

The water level sensors 222 and 224 simply have a configuration including a bolt, a nut and a washer. That is, electricity is transmitted to the water in the water reservoir 200 through the bolt and nut. In addition, since the bolt or nut should not be corroded in water, it is preferable that the bolt or nut is formed of a material that prevents corrosion (for example, gold or platinum) or coated with a corrosion preventing material on its surface.

On the other hand, the water level sensor (222, 224) also serves as a pollution detection means for measuring the degree of contamination of the water stored in the water reservoir (200). That is, when the high water level sensor 222 or the low water level sensor 224 and the reference sensor 226 is made electricity, electricity flows through the water inside the water reservoir 200, and the resistance of the water is measured by measuring the resistance at this time. You can judge the degree.

For example, when power is applied such that the high water level sensor 222 is a positive (+) pole and the reference sensor 226 is a negative (-) pole, electricity flows through the water inside the water reservoir 200. In the case of a large amount of foreign matter in such water, the resistance is large, the electricity is not flowing well. Therefore, by applying power to each of the water level sensors to measure the resistance value of the water, it is possible to know the clean state of the water.

For example, when the pollution degree of water is 3ppm, the distance between the high water level sensor 222 and the reference sensor 226 is set so as to have a resistance value of 250 kΩ, and then the control unit 340 to be described below. When a resistance of 250 kΩ or more is calculated, water may be prevented from being supplied to the water reservoir 200 from the outside.

The water supply pipe 230 is installed at the bottom rear end of the water reservoir 200. The water supply pipe 230 is composed of a pipe (pipe), it is installed in communication with the interior of the water reservoir 200 serves as a passage to allow the external water to be supplied into the water reservoir (200).

The water supply pipe 230 is provided with a solenoid valve 300 that is an opening and closing means of the water supply pipe 230. The solenoid valve 300 is a mechanism configured to open and close the passage by the force of electricity, its configuration and operation is a general known technique, so a detailed description thereof will be omitted.

An upper end of the water supply pipe 230 is formed to extend through the water reservoir 200 and then be bent upwards. Therefore, water is injected into the water reservoir 200 while the external water is sprayed upward through the top of the water supply pipe 230.

On the other hand, since the solenoid valve 300 is configured to open and close the water supply pipe 230 by the power of electricity, power is applied to the solenoid valve 300, the power applied to the solenoid valve 300 is external A voltage lower than the power supply is used.

This is because the power supplied to the solenoid valve 300 is also used in devices such as the water level sensors 222 and 224 to prevent the user from being infected with electricity. Therefore, one side of the solenoid valve 300 is provided with a power transformer 310 to provide a reduced pressure to the electricity supplied from the outside. That is, the power transformer 310 is supplied by reducing the voltage of approximately 120 to 240V supplied from the outside to a voltage of 24V.

The other end of the solenoid valve 300 is connected to the water purifier 320. The water purifier 320 serves to purify the water supplied from the outside to clean water. That is, the water supplied from the external faucet 330 is purified and supplied to the water reservoir 200.

On the other hand, the water level sensor (222, 224) to determine the water level or the degree of contamination, and then the control unit 340 for controlling the water supply pipe 230 to open and close the solenoid valve 300 is provided. .

The control unit 340, which is a control means of the cold / hot water purifier, is provided with a control component including a PCB (PCB) to measure and control various states of the cold / hot water purifier. For example, the controller 340 receives the information on the capacity of the water detected by the water level sensors 222 and 224, and controls the power supply by controlling the power supplied to the solenoid valve 300 based on this.

On the other hand, when the pollution degree of the water stored in the water reservoir to check the pollution degree exceeds the set pollution, the solenoid valve 300 is blocked so that no more water is supplied to the water reservoir 200.

Although not shown, a contamination display unit for displaying the pollution degree of the water reservoir 200 may be further provided on the front surface of the main body 100. The pollution display unit calculates the pollution state of water provided through the pollution detection means including the water level sensors 222 and 224 from the resistance value of the water so that the user can recognize it.

For example, as illustrated above, when the water resistance value is 250 kPa, if the pollution degree is set to 3 ppm, the pollution degree may be displayed according to the water resistance value, and finally, when the water resistance value reaches 250 kPa, A warning light or a warning sound may be generated to allow a user to replace the filter of the water purifier 320 or take other actions.

Hereinafter, the operation of the cold / hot water purifier according to the present invention having the configuration as described above will be described with reference to FIGS. 3 to 6.

When tap water is supplied through the faucet 330, the tap water is purified while passing through the water purifier 320. Since the water purification process in the water purifier 320 is generally known, the detailed process is omitted.

The purified water passing through the water purifier 320 passes through the solenoid valve 300. The solenoid valve 300 opens and closes the solenoid valve 300 according to a control signal transmitted from the controller 340 to selectively flow water supplied from the water purifier 320.

On the other hand, the external power supplied from the outside passes through the power transformer 310. Therefore, in general, the external power source ranging from 110V to 220V is converted into 24V and supplied to the cold / hot water purifier. Therefore, even if a short circuit occurs, the risk of lethal electric shock to the user is prevented.

The power supplied through the power transformer 310 is supplied to and used in various components including the solenoid valve 300 and the controller 340.

The water passing through the solenoid valve 300 is supplied to the water reservoir 200 along the water supply pipe 230. That is, since one end of the water reservoir 200 is installed in communication with the lower end of the water reservoir 200, when the solenoid valve 300 is opened, water is supplied to the water reservoir 200 to gradually increase the water level. Increases.

When the water level of the water reservoir 200 reaches a high water level, the high water level sensor 222 and the reference sensor 226 form a closed circuit. That is, the electric current flowing through the water of the water reservoir 200 flows through the high water level sensor 222 flows to the reference sensor 226 so that the control unit 340 detects it.

In this case, the control unit 340 blocks the water supply through the water supply pipe 230 by sending a control signal to the solenoid valve 300 to block the water supply pipe 230. On the other hand, when water is supplied to the water reservoir 200, the water level of the water reservoir 200 is gradually increased, the air pressure inside the water reservoir 200 is increased. At this time, the air in the water reservoir 200 is discharged to the outside through the air pipe 210.

The water stored in the water reservoir 200 is taken out by the user and used. That is, when the user places a cup (not shown) in the lower portion of the outlet 132 provided in the water outlet 130 of the main body 100, and pushes backward, water is drawn out through the outlet 132. do.

When the user takes out the water from the water reservoir 200 as described above, the water level of the water reservoir 200 is gradually reduced. As such, when the water level of the water reservoir 200 gradually decreases to reach the low water level of the water reservoir 200, the state is transmitted to the controller 340 to open the solenoid valve 300 to open the water supply pipe 230. Water is to be supplied to the water reservoir 200 through.

That is, when the water level of the water reservoir 200 gradually decreases and becomes lower than the low water level sensor 224, the closed circuit formed through the low water level sensor 224 and the reference sensor 226 is disconnected. When the state is transmitted to the control unit 340, the control unit 340 sends a signal to open the solenoid valve 300.

On the other hand, the water supplied to the water reservoir 200 is purified while passing through the water purifier 320, if the water purification function is degraded due to poor or old water purifier 320 is properly in the water reservoir 200 Unpurified contaminated water is supplied, which in turn results in the user drinking the contaminated water.

In addition, even when the purified water is properly supplied from the water purifier 320, the water of the water reservoir 200 as a result of the deterioration of the water supply pipe 230 or the container itself of the water reservoir 200 is contaminated This may be contaminated. In this case, it is necessary to prevent the user from drinking the water in the water reservoir 200 and find out the cause of water pollution and improve it.

Therefore, since the cold and hot water purifier according to the present invention is further provided with a pollution detecting means, it is possible to take appropriate measures by measuring the contamination state of such water.

When water is supplied to the water reservoir 200 and the water level is gradually improved, since electricity flows through the water in the water reservoir 200, a closed circuit is formed through the low water level sensor 224 or the high water level sensor 222. .

At this time, since electricity flows through the water in the water reservoir 200, the resistance value of the water is calculated. The resistance value of the water varies depending on the pollution degree of the water. That is, the higher the cleanliness of the water, the better the electricity will be lower the resistance value, the higher the pollution of the water will be the larger the resistance value.

As such, when the water inside the water reservoir 200 reaches a set resistance value (for example, 250 kΩ), the state is transmitted to the controller 340 to shield the solenoid valve 300 so that the water supply is stopped. . On the other hand, since such a resistance value is displayed through the contamination display unit (not shown), the user will find and repair the pollution source by checking the state of the water purifier 320 or other parts.

On the other hand, through the air pipe 210 it is possible to enter and exit the air into the water reservoir 200, wherein the outside air is introduced into the water reservoir 200 before the air filter 212 Foreign matter is filtered out.

The scope of the present invention is not limited to the above-exemplified embodiments, and many other modifications based on the present invention may be made by those skilled in the art within the above technical scope.

For example, in the above embodiment, for convenience of description, various components such as the water purifier 320 or the solenoid valve 300 are illustrated as being outside the main body 100, but the various components are described above. Of course, the product can be configured in the state inserted into the main body 100, as well as having a separate control box on the back of the main body 100 may be embedded.

In addition, the number of various water level sensors 222 and 224 shown in the above embodiment may be added or subtracted according to the use state or necessity, and the operation process of such a sensor is also easy by detecting the water level or the contamination state according to the present invention. It can be configured in various ways within the range that can control the water supply.

In the present invention as described above, it is configured to determine the water supply by measuring the state of the water temporarily stored in the water reservoir.

Therefore, by simply measuring the water level inside the water reservoir easily and automatically determine whether the water supply, by reducing the number of parts and parts cost compared to the conventional mechanical, while preventing the failure due to the operation error of the parts There is.

On the other hand, in the cold and hot water purifier of the present invention can measure the degree of contamination of the water temporarily stored in the water reservoir, the user can detect this even if the water is contaminated due to failure or other parts of the water purifier.

Therefore, the user can always drink clean water despite poor water purification or contamination of other parts.

In addition, the air flowing into the water reservoir is filtered because the foreign matter is filtered by the air filter is expected to have the advantage of preventing contamination of water due to air pollution.

1 is a cross-sectional view showing a schematic configuration of a typical cold and hot water machine.

Figure 2 is a partial cross-sectional view showing an example of the mechanical water supply pipe opening and closing means according to the prior art.

Figure 3 is a front view showing a preferred embodiment of the cold / hot water purifier according to the present invention.

Figure 4 is a schematic view showing a schematic configuration of a preferred embodiment of a cold / hot water purifier according to the present invention.

Figure 5 is an enlarged view showing the configuration of a water reservoir constituting a preferred embodiment of the cold and hot water purifier according to the present invention.

6 is a perspective view of an air filter which is a component of a preferred embodiment of a cold / hot water purifier according to the present invention.

Explanation of symbols on the main parts of the drawings

100. Main body 110. Main body case

120. Heat exchange system 130. Water outlet

132. Outlet 132 '. Hot water outlet

132 ". Cold Water Outlet 134. Lever

200. Water reservoir 210. Air piping

212.Air Filter 222.High Water Level Sensor

224.Low water level sensor 226.Reference sensor

230. Water supply pipe 240. Water supply terminal

242. Step 250. Sealing member

300. Solenoid Valve 310. Power Transformer

320. Water Purifier 330. Faucet

Claims (7)

An outer body formed by the main body case and having a heat exchange system provided therein; It is provided on one side of the main body, the water reservoir for storing water therein; Water level sensing means for sensing the water level of the water reservoir; Pollution detection means for measuring a pollution degree of water stored in the water reservoir; A water purifier for supplying water to the water reservoir by purifying water supplied from the outside; A water supply pipe that becomes a passage through which the water passing through the water purifier is supplied to the water reservoir; Water supply pipe opening and closing means for selectively opening and closing the water supply pipe; Cold water purifier characterized in that it comprises a control unit for controlling the water supply pipe opening and closing means to open and close the water supply pipe in accordance with the information provided from the water level detecting means. The cold and hot water purifier of claim 1, wherein the water reservoir is made of polycarbonate. The cold and hot water purifier of claim 1 or 2, further comprising a sealing member at a lower end of the water reservoir to prevent leakage of water. The cold and hot water purifier of claim 3, wherein the lower end of the water reservoir is stepped to prevent the flow of the sealing member. According to claim 1, wherein the water level detecting means, High water level sensing means for sensing the maximum storage level of the water reservoir and low water level sensing means for sensing the minimum storage level of the water reservoir; The water supply pipe opening and closing means, Cooling water purifier, characterized in that the water supply pipe when the water level reaches the maximum storage water level to shield the water supply pipe, and the water supply pipe when the water level of the water reservoir reaches the minimum storage water level. The cold and hot water purifier of claim 1, further comprising an air filter on one side of the water reservoir to filter air entering and exiting the water reservoir. The cold and hot water purifier of claim 1, wherein one end of the water supply pipe extends into the water reservoir and guides the water introduced into the water reservoir to be sprayed upward.