JP5190496B2 - Water cooler - Google Patents

Description

  The present invention can take out the water in the container provided in the water cooler in two states, cooling water and water close to the outside temperature, and more effectively improve the oxygen in the lower water storage section where the cold water is stored. While dissolving, the convection between the water stored in the upper water storage part and the heated water while passing through the normal temperature water connection pipe is smoothly performed, and overload of the heating member can be prevented, It relates to a water cooler that can be supplied.

  Today, the water drawn from the deep sea and the water drawn from the groundwater contain abundant minerals and other ingredients, and are sold at convenience stores and other retail stores.

  Such water is usually cooled or drunk as it is because minerals contained in the water are destroyed by heating. And the water cooler which hold | maintains drinking water in a water tank and can take out from the water tank and drink it when needed is proposed in patent document 1.

  However, the water cooler can take out only cooled water, and when it is desired to drink the water as it is without cooling, it is necessary to prepare water separately, which is troublesome.

  In the water cooler, a water storage part for storing uncooled water may be provided separately from the water storage part for storing the water to be cooled, but either one of the cooled water and the uncooled water is provided. When more water is consumed compared to the other water, the water in the water storage section that has not been consumed is stored for a long period of time, which causes a problem that it is not preferable in terms of hygiene.

  On the other hand, in Patent Document 2, in order to improve the conventional problems as described above, a water storage tank is disposed in the chiller body as shown in FIG. A container mounting member for detachably mounting is disposed, and water in the container mounted on the container mounting member can be supplied into the water storage tank, and the water storage tank is separated by a partition plate. Divided into upper and lower water storage units, these upper and lower water storage units are connected and communicated in part, and cooling means is disposed in the lower water storage unit to cool the water in the lower water storage unit, A water cooler is proposed in which water in the upper water reservoir and water in the lower water reservoir can be taken out separately.

  However, the water cooler of FIG. 4 is water obtained by cooling water contained in a container such as a plastic bottle (hereinafter simply referred to as “cooling water”) and water that is not cooled and is close to the outside temperature (hereinafter referred to as “room temperature”). If you prefer, you can take out and drink either cooling water or room temperature water, and drink either cooling water or room temperature water more than the other. Even in such a case, the water in the water storage tank decreases without distinction between cooling water and room temperature water, and there is an effect that fresh cooling water and room temperature water can always be taken out and drunk. However, oxygen cannot be dissolved well in the lower water storage portion 2b where the water cooler is stored, and the room temperature water connection pipe, that is, the second connection pipe 63 is bent at a 90 ° angle so as to be horizontal with the bottom surface of the water storage tank 2. Since it is provided in parallel to the imaginary line and the height of the water intake end and the water discharge end is the same, the water between the water stored in the upper water storage portion 2a and the water heated while passing through the second connection pipe 63 Convection is not smooth. Therefore, there is a possibility that an overload is applied to the heating member 65, and it is difficult to smoothly supply room temperature water, and there is a problem that the noise is severe.

JP-T-2002-527239 Korean Patent Publication No. 10-2009-0117990

  The present invention made to solve such problems of the conventional water cooler can take out the water in the container mounted on the water cooler in two states, cooling water and water close to the outside temperature, Oxygen is more effectively dissolved in the lower reservoir where cold water is stored, and convection between water stored in the upper reservoir and water heated while passing through the room temperature water connection pipe is smooth. The purpose of the present invention is to provide a water cooler that can prevent overloading of the heating member, can smoothly supply room temperature water, and can minimize noise.

In order to achieve the above-mentioned object, the water cooler according to the present invention has a water storage tank disposed in the main body of the water cooler, and a container mounted for detachably mounting the container on the upper stage of the water storage tank. A member is provided, and water in a container attached to the container attachment member can be supplied into the water storage tank, and the water storage tank is divided into an upper water storage part and a lower water storage part by a partition plate. The upper water storage section and the lower water storage section are partially connected and communicated with each other, and the lower water storage section is provided with cooling means so that the water in the lower water storage section can be cooled. In the chiller configured to be capable of separately taking out the water in the upper water reservoir and the cold water in the lower water reservoir, an oxygen agitation pump is disposed below the lower water reservoir, and the oxygen agitation pump The lower water storage by a cold water inflow pipe connected to the center of the upper end of the Cold water of the inner and supplies the oxygen stirring pump, vacuum swing adsorption (Vaccum Swing Adsorption, VSA) supplying oxygen generated by the oxygen generator that utilizes a zeolite bed system to oxygen stirred pump with cold water through the cold water inlet tube In addition, it is configured to supply the stirred water mixture of cold water and oxygen mixed by the oxygen stirring pump into the lower water storage section through the cold water mixture supply section connected to the upper end side of the oxygen stirring pump. Features.

  Further, the water cooler of the present invention is provided with a room temperature water discharge pipe 91 at the lower stage of the upper water storage section 2a, and the room temperature water discharge pipe 91 is connected to the cold water / room temperature water discharge section H by a room temperature water connection pipe 92. The normal temperature water connection pipe is provided to be inclined downward at an angle θ1 of 15 to 45 ° with an imaginary line XX that is parallel to the bottom surface of the water storage tank. It is preferable that the heating member 93 of the ceramic heater is attached.

  The water cooler according to the present invention can take out the water in the container attached to the water cooler in two states of cooling water and water close to the outside air temperature, and oxygen is stored in the lower water storage section where the cold water is stored. It can be dissolved more effectively and well, and the convection between the water stored in the upper water storage part and the water heated while passing through the room temperature water connection pipe can be smoothly performed to prevent overheating of the heating member, Smooth supply of room temperature water is possible and noise can be minimized.

1 is a longitudinal sectional view schematically showing a water cooler according to the present invention. It is the longitudinal cross-sectional view which showed the upper stage part of the water cooler based on this invention in detail. It is an enlarged view of the normal temperature water connection pipe 92 and the heating member 93 among the water coolers which concern on this invention. It is the longitudinal cross-sectional view which showed the conventional water cooler.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
As shown in FIGS. 1 and 2, the water cooler according to the present invention has a water tank 2 disposed in the main body 1 of the water cooler, and a container is detachably mounted on the upper stage of the water tank 2. A container mounting member 3 is provided, and water in the container B mounted on the container mounting member 3 can be supplied into the water storage tank 2. The water storage tank 2 is separated by a partition plate 4. The upper water storage section 2a and the lower water storage section 2b are divided into a part of the upper water storage section 2a and the lower water storage section 2b, and a cooling means 8 is disposed in the lower water storage section 2b. In the chiller configured to be able to cool the water in the lower water reservoir, and configured to be capable of separately taking out the water in the upper water reservoir 2a and the water in the lower water reservoir 2b, The lower water reservoir 2b has a vacuum vibration adsorption (VSA) type zeolite bed. An oxygen agitation pump 73 that agitates and circulates oxygen and cold water generated by an oxygen generator utilizing the above is connected.

  FIG. 1 is a longitudinal sectional view schematically showing a chiller according to the present invention, and FIG. 2 is a longitudinal sectional view showing an upper stage portion of the chiller according to the present invention in detail.

  An oxygen generator 71 is provided in the lower space 15. The oxygen generator 71 is manufactured using a zeolite bed and pressure vibration adsorption (Pressure Swing Adsorption) (hereinafter referred to as “PSA”), a method using a zeolite bed and vacuum vibration adsorption (VSA), or electrolysis. How to do is known. In producing a compact low-noise indoor water cooler, it is difficult to apply a PSA product because of its relatively large size and noise. In addition, since the electrolysis method generates a very small amount of oxygen, unless a highly efficient dissolved system is additionally provided, the supply amount of oxygen is greatly reduced, and the necessary amount of oxygen cannot be produced. There are disadvantages. Therefore, in such a case, a high-efficiency dissolution system using a high-pressure large-capacity pump is necessary, but this induces a very large noise.

  Furthermore, in the case of the electrolysis method, oxygen is generated by the decomposition of water by the electrode plate. If very pure water is not used, foreign matter adheres to the electrode plate and the life of the electrode plate is shortened. There is a problem that the generation of oxygen is not smooth. Therefore, the water supply method required for electrolysis is very important.

  In order to solve this, it is necessary to use a filter or the like, and there arises a problem that it must be periodically replaced.

  Therefore, the VSA method is effective in the compact oxygen generator 71 having an appropriate flow rate with high purity.

  On the other hand, in the conventional oxygen dissolving method, oxygen generated by the oxygen generator is directly supplied to the cold water in the water storage tank 2 using an air stone or the like.

  However, since such a method does not require a separate dissolving device, there is an advantage that the noise is small and the cost is reduced. However, since the size of oxygen bubbles generated in the air stone is large, oxygen is dissolved in cold water. There are disadvantages of slow speed and low concentration. Therefore, there is a problem that the oxygen generator must be operated for a long time in order to generate oxygen-dissolved cold water above a certain level.

  If the oxygen generator 71 equipped with a motor is operated for a long time in order to increase the dissolved amount in this way, the calorific value of the oxygen generator itself increases, so that the durability is greatly reduced. As a result, there arises a problem that noise increases in sequence.

  Therefore, in order to solve such problems, the water cooler of the present invention has been developed in order to minimize the operation time of the oxygen generator 71 and increase the efficiency of dissolving oxygen.

  That is, comparing the cycle in which the oxygen generator 71 is operated for 20 minutes and then stopped for 1 hour, and the cycle in which the oxygen generator 71 is operated for 1 hour and then stopped for 1 hour, the former quantitatively has about three times the durability. Because.

  As another oxygen dissolution method, there is a method of improving the dissolution efficiency by mixing oxygen and cold water and passing through an orifice tube at a high pressure to reduce the size of oxygen bubbles. In order to obtain higher efficiency, a method of passing through a hollow fiber membrane is also used, but such a method passes a mixture of cold water and oxygen at a high pressure, thus generating a large noise and providing a high pressure. In order to do so, there is a disadvantage that a relatively high cost large pump must be used.

  In normal cases, it is known that most people do not feel the noise when the noise measured at a distance of 1 m from the front of the water cooler is 45 dB or less. However, if the noise measured at a distance of 1 m from the front of the water cooler provided in the room is 50 dB or more, noise detection is started. When the mixture passes through the orifice tube at high pressure, the noise measured at a distance of 1 m from the front of the water cooler becomes higher than 50 dB.

  In the present invention, oxygen is produced by the oxygen generator 71 using a VSA-type zeolite bed, so that it is possible to effectively prevent the conventional problem that the heat generation amount of the oxygen generator 71 itself is increased and the durability is lowered. Noise measured at a distance of 1 m from the front of the water cooler can be reduced to 45 dB or less.

  Further, in the present invention, an oxygen agitation pump 73 is connected to the lower stage of the lower water storage unit 2b so that cold water and oxygen generated by the oxygen generator 71 are stirred and circulated to the lower water storage unit 2b. It dissolves better in the cold water stored in the lower water reservoir 2b.

  An oxygen / cold water mixture supply unit 7 for supplying a mixture of cold water and oxygen into the lower water storage unit 2b is connected to one upper end side of the oxygen agitation pump 73. A cold water inflow pipe 74 for supplying cold water stored in the water reservoir 2b to the oxygen stirring pump 73 is connected.

  Considering the effect of noise reduction, the oxygen stirring pump 73 is preferably a magnetic motor.

  The concentration of oxygen generated by the oxygen generator 71 of the chiller according to the present invention is 60% by volume or more, the oxygen flow rate is 0.05 to 0.5 liter / min, and the concentration of oxygen dissolved in the chilled water is 40 ppm or more.

  When the oxygen generated in the oxygen generator 71 and the water in the water storage tank 2 are vigorously stirred / exhausted using the oxygen stirring pump 73, the dissolved concentration in 3 liters of cold water reaches 40 ppm or more early, for example, within 20 minutes. Improve quickly.

  Generally, cold water contains about 5 to 15 ppm of dissolved oxygen. Based on the capacity of the oxygen agitation pump 73, the rotational speed is preferably 2000-3700 rpm level, and the suction end is manufactured in a T shape so that oxygen supplied from the oxygen generator and water in the water storage tank can be sucked simultaneously. It is preferable to do. Moreover, it is preferable that the oxygen supply flow rate of the oxygen generator is 0.05 to 0.5 liter / min so that water and oxygen in the water tank are circulated and supplied.

  When the rotation speed of the oxygen stirring pump 73 is smaller than 2000 rpm, the stirring effect is lowered, and when it is larger than 3700 rpm, the noise is increased. Further, when the oxygen supply flow rate is less than 0.05, the dissolution rate is low, and when it is greater than 0.5, the increase in the dissolution rate is minimal, but the noise during stirring increases.

  Various types of motors can be used as the oxygen stirring pump optimal for such applications, but it is preferable to use a magnetic motor in consideration of noise, corrosion resistance, and durability.

  Furthermore, the concentration of oxygen generated in the oxygen generator must be 60% by volume or more. If the oxygen concentration is less than that, the oxygen generator's operating time cannot be minimized because the oxygen concentration is insufficient, and within the minimum operating time (for example, operating time less than 20 minutes). In addition, when the oxygen concentration cannot be improved, the operating time becomes longer, which causes an increase in noise.

  As shown in FIGS. 1 and 3, the water cooler according to the present invention is connected to the lower stage of the upper water storage section 2 a with a room temperature water discharge pipe 91. The room temperature water discharge pipe 91 has a room temperature water connection pipe 92. The cold water / normal temperature water discharge portion H is connected to the cold water / normal temperature water discharge portion H, and the normal temperature water connection pipe 92 is provided so as to be inclined downward at an angle θ1 of 15 to 45 ° with an imaginary line XX that is parallel to the bottom surface of the water tank 2. ing. The room temperature water connecting pipe 92 provided in such an inclination has a structure in which a heating member 93 of a ceramic heater is attached.

  FIG. 3 is an enlarged view of the room temperature water connecting pipe 92 and the heating member 93. As shown in FIG. 4, the conventional room temperature water supply method in the water cooler uses a heating member 65 to heat the water in the connecting pipe when drinking water from the upper water storage section 2a. In such a method, since the angle of the second connecting pipe 63 is bent to 90 °, the surrounding area of the heating member 65 is heated due to local overheating while the surrounding area is heated by the heat generated by the heater. Since it is not smooth that warm water flows into the water storage tank 2, the heating temperature of the room temperature water portion is low. In addition, the convection of heat is distributed to the water discharge and storage tank side, the supply capacity of room temperature water is small, and the heating member 65 is overloaded.

  In order to solve such disadvantages, in the present invention, as shown in FIGS. 1 and 3, the room temperature water connection pipe 92 is at an angle of 15 to 45 ° with the imaginary line XX that is parallel to the bottom surface of the water tank 2. The heating member 93 provided to be inclined downward at θ1 and attached to the room temperature water connecting pipe 92 is provided to be inclined similarly to the room temperature water connecting pipe 92.

  Thereby, the height of the outlet end 92B of the room temperature water connecting pipe is kept lower than the height of the inlet end 92A of the room temperature water connecting pipe.

  Thereby, the hot water in the room temperature water connection pipe 92 heated by the heating member 93 is easily convected to the water inlet end 92A above the water outlet end 92B, and repeats heat exchange with the water in the upper water storage section 2a. Thus, the temperature of the water inlet end 92A is kept at a room temperature of about 17 ° C., and the temperature in the room temperature water connection pipe contacting the heating member 93 is kept at about 60 ° C. to prevent overheating of the heating member 93.

  At this time, when the temperature of the heating member 93 is 110 ° C. or higher, there is a risk of durability deterioration and safety problems due to overloading of the heating member. Keeping the temperature below 17 ° C. makes it difficult to smoothly supply room temperature water.

  When the inclination angle θ1 of the room temperature water connection pipe is less than 15 °, the convection of the hot water is not smoothly performed, so that the water temperature in the upper water storage portion 2a is lowered to 15 ° C. or less. On the other hand, when the inclination angle θ1 exceeds 45 °, the convection of water is smooth, but the internal space increases in proportion to the size of the heater, and the size of the entire product also increases.

  The bending angle θ2 on the water inlet end 92A side of the room temperature water connection pipe is preferably 110 °, and the bending angle θ3 on the water outlet end 92B side is preferably 90 °.

  On the other hand, a cold water discharge pipe 94 is provided at the lower stage of the lower water storage section 2b, and one side of the cold water discharge pipe 94 and one side of the room temperature water connection pipe 92 are connected to the cold water / room temperature water discharge section H, respectively. Yes.

  The cold water / normal temperature water discharge part H can select either cold water or normal temperature water by another selection button not shown in the figure with the cold water / normal temperature water discharge port H1, thereby through the cold water / normal temperature water discharge port H1. The selected water is removed.

  An example of the water cooler A of the present invention will be described with reference to FIGS. 1 and 2, the chiller main body 1 is divided into three in the vertical direction by upper and lower mounting plates 11 and 12, and the upper space portion 13, the central space portion 14 and the lower space are respectively separated from the top to the bottom. It consists of part 15.

  A water storage tank 2 is disposed in the upper space 13 of the chiller main body 1. The water tank 2 is formed in a bottomed cylindrical shape including a flat rectangular bottom portion 21 and a peripheral wall portion 22 extending upward from the outer peripheral edge of the bottom portion 21, and the upper end is entirely covered. It is open.

  And the opening part 16 is formed in the upper end surface of the water cooler main body 1, and the upper end opening of the water storage tank 2 is set so that the upper end opening part of the water storage tank 2 is located vertically below the opening part 16. The end is fixed to the cooler body 1.

  Further, the container mounting member 3 is integrally provided in the opening 16 of the chiller body 1. The container mounting member 3 includes a planar circular bottom 31, a support portion 3 a including a cylindrical peripheral wall portion 32 extending upward from the outer peripheral edge of the bottom portion 31, and a bottom portion 31 of the support portion 3 a. And a mounting portion 3b provided integrally. A through-hole 3c that penetrates between the inner and outer surfaces of the support portion 3a is formed in the connecting portion between the bottom portion 31 and the peripheral wall portion 32 of the support portion 3a.

  The peripheral wall portion 32 of the support portion 3a of the container mounting member 3 has a cylindrical portion 32a having a constant inner diameter at the lower half, and an inner diameter that extends outward as it goes upward and continues to the upper end of the cylindrical portion 32a. And a mortar-like container support 32b.

  And the inner peripheral surface 321b of the container support part 32b in the support part 3a of the container mounting member 3 is formed in the curved surface curved in the circular arc shape toward the outer side, and upper part B2 of the container B by this inner peripheral surface 321b. It is comprised so that it may support.

  Further, a ring-shaped horizontal portion 33 is extended over the entire periphery of the upper end edge of the peripheral wall portion 32 of the support portion 3a of the container mounting member 3, and the outer peripheral edge of the horizontal portion 33 extends over the entire periphery. Thus, the outer wall 34 extends vertically downward.

  Further, a mounting portion 3 b is integrally provided on the bottom 31 of the support portion 3 a of the container mounting member 3. The mounting portion 3b is formed in a bottomed cylindrical shape having a fixed length with the upper end closed and the lower end opened entirely, and passes through the bottom 31 of the support portion 3a with the upper end closed. The lower end portion protrudes downward from the lower surface of the bottom portion 31 of the support portion 3a.

  And the flow hole parts 35 and 35 penetrated over the inner peripheral surface are formed in the upper end part of the mounting part 3b in the state which faced the diameter direction, These flow hole parts 35 and 35, and a mounting part The inside and outside of the support portion 3a are in communication with each other through the space portion in 3b.

  When the container B such as a plastic bottle is disposed in the support part 3a of the container mounting member 3 with the opening part downward, the upper part B2 of the container B is supported by the inner peripheral surface 321b of the container support part 32b. At the same time, the mouth B1 of the container B is fitted to the upper end of the mounting part 3b of the container mounting member 3. In this state, the flow holes 35 and 35 of the mounting portion 3b are positioned in the mouth B1 of the container B.

  By inserting the container mounting member 3 into the opening 16 of the chiller body 1 from above, the outer wall 34 of the support 3a of the container mounting member 3 is brought into contact with the inner peripheral surface 16a of the opening 16 of the chiller body 1. In the abutted state, the container mounting member 3 is mounted and integrated in the opening 16 of the chiller body 1.

  The support portion 3a of the container mounting member 3 is in a state in which the cylindrical portion 32a is located in the water storage tank 2 except for the upper end portion thereof, and in a state where the container B is mounted on the container mounting member 3, The opening end (lower end) of the mouth portion B1 is configured to be positioned below the upper end of the water storage tank 2.

  In addition, a partition plate 4 is disposed in the central portion of the water storage tank 2 in the vertical direction. The partition plate 4 has the same shape as the bottom portion 21 of the water storage tank 2 and is slightly smaller than the bottom portion 21, and the partition plate 4 divides the inside of the water storage tank 2 into the upper and lower water storage portions 2 a and 2 b. On the other hand, a gap 2c is formed over the entire circumference between the outer peripheral edge of the partition plate 4 and the inner peripheral surface of the water storage tank 2 facing the outer peripheral edge, and the upper and lower water storage portions 2a, 2b is connected and communicated by a gap 2c.

  A cylindrical ice regulating portion 41 is integrally provided on the outer peripheral edge of the partition plate 4 over the entire circumference, and ice formed in the lower water storage portion 2b by the ice regulating portion 41 is provided. It is comprised so that it may not penetrate | invade in the upper side water storage part 2a.

  Furthermore, a cylindrical oxygen holding plate 42 having a certain height is integrally provided on the outer peripheral edge of the lower surface of the partition plate 4 so as to surround a connecting pipe portion 46 described later. And an oxygen space 43 formed by the part of the partition plate 4 surrounded by the oxygen holding plate 42. The oxygen space 43 holds oxygen supplied from the oxygen / cold water mixture supply unit 7 and holds an oxygen layer. 43a can be formed.

  On the other hand, on the upper surface of the partition plate 4, a cylindrical partition wall having a constant height and having a smaller diameter than the oxygen holding plate 42 and a larger diameter than the cylindrical portion 32 a of the support portion 3 a of the container mounting member 3. 44 protrudes upward so as to surround a connecting pipe portion 46 to be described later, and the lower end portion of the holding portion 3 a of the container mounting member 3 is located in the upper portion of the partition wall 44. The upper end of the partition wall 44 is configured to be positioned below the opening end (lower end) of the mouth portion B1 of the container B mounted on the mounting portion 3b of the container mounting member 3.

  The partition plate 4 surrounded by the partition wall 44 is formed with a plurality of bulge portions 45 by bulging the partition plate 4 upward in a semi-spherical shape. An oxygen circulation hole 45a is provided at the top so as to penetrate between the upper and lower surfaces. Oxygen held in the oxygen space 43 is intermittently above the partition plate 4 through the oxygen circulation hole 45a, that is, on the upper side water storage. It is comprised so that it may be supplied to the part 2a. The diameter of the oxygen circulation hole 45a is normally adjusted to 2.5 mm or less, preferably 1 to 2 mm.

  Further, a connecting pipe portion 46 having a certain length is integrally provided at the center portion of the partition plate 4 so as to penetrate the partition plate 4 in the vertical direction. A through hole penetrating in the direction, and the upper end opening of the through hole is located at a position slightly spaced vertically downward from the lower end opening of the mounting portion 3b of the container mounting member 3 A room temperature water discharge pipe 91 is connected to the lower end opening of the hole.

  On the other hand, while the invention has been described in terms of several preferred embodiments within the present specification, many variations and modifications will occur to those skilled in the art without departing from the scope and spirit of the invention as disclosed in the appended claims. It should be understood that can be made.

DESCRIPTION OF SYMBOLS 1 Chiller main body 2 Water storage tank 2a Upper side water storage part 2b Lower side water storage part 2c Crevice 3 Container mounting member 3a Support part 3b Mounting part 4 Partition plate 41 Ice control part 42 Oxygen holding plate 43 Oxygen space part 43a Oxygen layer 44 Partition wall 45a Through hole 46 Connecting pipe part 5 Discharge member 5a Discharge part 5b Cover part 53 Discharge pipe 54 Pipe body part 55c Opening part 61 First connection pipe 62 First faucet part 63 Second connection pipe 64 Second faucet part 65 Heating member 7 Oxygen / Cold water mixture supply part 8 Cooling pipe A Chiller B Container B1 Mouth part 73 Oxygen stirring pump 74 Chilled water inflow pipe 91 Room temperature water discharge pipe 92A Room temperature water connection pipe 92 Inlet room temperature water connection pipe 92B Room temperature water connection pipe out end 93 Heating member XX Bottom of storage tank and horizontal imaginary line 94 Chilled water discharge pipe H Chilled water / room temperature water discharge part H1 Chilled water / room temperature water outlet θ1 XX line and room temperature water connection Bending angle of the bending angle θ3 cold water flooding end of but a tilt angle θ2 cold water entering water end

Claims (5)

A water storage tank is disposed in the chiller body, and a container mounting member for detachably mounting the container is disposed on the upper portion of the water storage tank, and the inside of the container mounted on the container mounting member The water storage tank is divided into an upper water storage section and a lower water storage section by a partition plate, and the upper water storage section and the lower water storage section are in part. The lower water reservoir is provided with a cooling means so as to be able to cool the water in the lower water reservoir, and the water in the upper water reservoir and the cold water in the lower water reservoir And a water cooler configured to be separately removable, an oxygen agitation pump is disposed below the lower water storage part, and a cold water inflow pipe connected to the center of the upper end of the oxygen agitation pump is provided in the lower water storage part. cold water supplies to the oxygen stirring pump, Empty swing adsorption (Vaccum Swing Adsorption, VSA) oxygen generated by the oxygen generator that utilizes a zeolite bed system is supplied to the oxygen stirred pump with cold water through the cold water inlet tube, stirring by the oxygen stirring pump, mixed cold water and A chiller configured to supply a stirring mixture with oxygen into the lower water storage section through a chilled water mixture supply section connected to one upper end of an oxygen stirring pump.   A room temperature water discharge pipe is provided at the lower stage of the upper water storage section, and the room temperature water discharge pipe is connected to the cold water / room temperature water discharge section H by a room temperature water connection pipe, and the room temperature water connection pipe is parallel to the bottom of the water storage tank. And a hypothetical line XX that forms an angle of 15 to 45 ° with an angle θ1 of 15 ° to 45 °, and a heating member of a ceramic heater is attached to the inclined normal temperature water connection pipe The water cooler of Claim 1 characterized by these.   The concentration of oxygen generated in the oxygen generator is 60% by volume or more, the oxygen flow rate is 0.05 to 0.5 liter / min, and the concentration of oxygen dissolved in cold water is 40 ppm or more. The water cooler according to claim 1.   The water cooler according to claim 1, wherein the oxygen stirring pump is a magnetic motor.   The water cooler according to claim 1, wherein the noise measured at a distance of 1 m from the front of the water cooler is 45 dB or less.

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