KR101215894B1 - Cold water dispenser - Google Patents

Abstract

The present invention provides a chilled water dispenser capable of taking out the water in a container arranged in the chilled water in two states of cooling water and water close to the outside temperature.
In the water cooler (A) of the present invention, the water storage tank (2) is arranged in the water cooler main body (1), and the container mounting member (3) for detachably attaching the container (B) to the upper end of the water storage tank (2). Is arranged so that the water in the container B attached to the container mounting member 3 can be supplied into the water storage tank 2, and the water storage tank 2 is formed by a partition plate 4. It is divided into the upper reservoir part 2a and the lower reservoir part 2b, and these upper reservoir part 2a and the lower reservoir part 2b are connected and communicated in some part, The said lower reservoir part 2b is a cooling means. (8) is arranged to be configured to cool the water in the lower reservoir (2b), the lower reservoir and the oxygen produced in the oxygen generator using a zeolite bed of vacuum swing adsorption (VSA) method An oxygen stirring pump is connected to circulate cold water It is characterized by being.

Description

Cold water dispenser

According to the present invention, water in a container installed in a chiller can be taken out in two states: cooling water and water close to the outside temperature, and oxygen is dissolved more effectively in the lower storage unit where cold water is stored, and at the same time, The present invention relates to a cold water dispenser capable of preventing overload of a heating member by smoothly convection of heated water while passing through a normal temperature water connection pipe, and allowing a smooth supply of normal temperature water.

Today, water from deep seas and ground waters are sold in convenience stores and other retail stores in that they contain abundant minerals and other ingredients.

Such water is usually cooled or drunk as it is because mineral components and the like contained in the water are destroyed by heating. A cold water machine that maintains a beverage in a reservoir and can be taken out and drunk in a reservoir when necessary is disclosed in Japanese Patent Laid-Open No. 2002-527239.

However, when the cold water machine can only take out the cooled water and wants to drink the water as it is not cooled, there is a problem that it is necessary to prepare water separately.

Moreover, in the said cold water machine, you may install the reservoir part which stores the water which is not cooled separately from the reservoir part which stores the water to cool, but the water of either one of the cooled water and the water which is not cooled is the other. In the case where a large amount of water is consumed, water in the unused reservoir is stored for a long period of time, which causes a problem in that it is not hygienic.

On the other hand, in the Republic of Korea Patent Publication No. 10-2009-0117990 in order to improve the conventional problems as described above, as shown in Figure 4, the water tank is arranged in the body of the cold water, the upper end of the water tank is detachably mounted to the container The container mounting member for arranging is arrange | positioned, Comprising: It is comprised so that the water in the container attached to this container mounting member can be supplied to the said storage tank, The said storage tank is divided into the upper and lower reservoir parts by a partition plate, and these upper and lower reservoir parts are In some cases, the lower reservoir part is connected and connected, and cooling means is arranged in the lower reservoir part so that the water in the lower reservoir part can be cooled, and the water in the upper reservoir part and the water in the lower reservoir part separately. A chilled water chiller configured to be extractable is proposed.

However, the cold water of FIG. 4 is water cooled in water contained in a container such as a PET bottle (hereinafter, simply referred to as 'cooling water') and water in a state close to the outside air temperature which is hardly cooled (hereinafter referred to as 'normal temperature water'). The water in the reservoir is distinguished between the cooling water and the normal temperature water, even if the water can be taken out of the cooling water and the normal temperature water and drunk as much as one of the cooling water and the normal temperature water. Although it is reduced and there is always an effect that can take out the cool water and room temperature water in a fresh state, but can not dissolve the oxygen well in the lower reservoir (2b) where the cold water is stored, in other words, the normal temperature water connection pipe, that is, the second connection pipe (63) It is bent at an angle of 90 ° and installed in parallel with an imaginary line that is parallel to the bottom of the reservoir 2 so that the height of the inlet and outlet means is the same, Convection between the heated water while passing through the second connecting tube 63 is not easy to overload the heating member 65, the smooth supply of room temperature water is difficult, there is also a severe noise problem.

In order to solve the problems of the conventional chiller, in the present invention, the water in the container installed in the chiller can be taken out in two states of cooling water and water close to the outside temperature, and oxygen is further added to the lower storage unit in which the cold water is stored. Cold water that dissolves effectively and at the same time, the convection of the heated water through the connection between the water stored in the upper reservoir and the normal temperature water connection pipe smoothly to prevent overload of the heating element, and to provide a smooth supply of room temperature water, and to minimize noise It is a subject to provide a flag.

In order to achieve the above object, in the present invention, the lower reservoir 2b includes an oxygen stirring pump that circulates by stirring and circulating oxygen and cold water produced in an oxygen generator using a vacuum swing adsorption (VSA) type zeolite bed. Provide a chiller connected.

In addition, in the present invention, the room temperature water discharge pipe 91 is installed at the bottom of the upper reservoir part 2a, and the room temperature water discharge pipe 91 is connected to the room temperature water and the cold water discharge part H by the room temperature water connection pipe 92. The normal temperature water connection pipe is inclined downward with an imaginary line XX parallel to the bottom surface of the reservoir and an angle θ1 of 15 to 45 °, and the heating member 93 which is a ceramic heater is installed in the normal temperature water connection pipe inclined as described above. Cold water is attached.

The cold water machine according to the present invention can take out the water in the container installed in the cold water in two states of the cooling water and the water close to the outside temperature, and dissolved oxygen more effectively in the lower storage unit where cold water is stored, and at the same time the upper storage unit The convection of the heated water while passing through the stored water and the normal temperature water connection pipe is smooth to prevent overload of the heating member, smooth supply of room temperature water, and minimize noise.

1 is a longitudinal cross-sectional schematic diagram illustrating a chiller in accordance with the present invention.
Figure 2 is a longitudinal sectional view showing in detail the upper end of the water cooler according to the present invention.
3 is an enlarged view of the room temperature water connecting tube 92 and the heating member 93 in the cold water machine according to the present invention.
Figure 4 is a longitudinal cross-sectional view showing a conventional chilled water.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 to 2, the water cooler according to the present invention has a water tank 2 arranged in the water cooler main body 1, and the upper end of the water tank 2 is equipped with a container for detachably mounting the container. The member 3 is arranged so that the water in the container B attached to the container mounting member 3 can be supplied into the water storage tank 2, and the water storage tank 2 is a partition plate ( 4) divided into an upper reservoir portion 2a and a lower reservoir portion 2b, and the upper reservoir portion 2a and the lower reservoir portion 2b are connected and communicated in part, and the lower reservoir portion 2b. Cooling means (8) is arranged to be configured to cool the water in the lower reservoir part, and to extract water in the upper reservoir (2a) and water in the lower reservoir (2b) separately. In the cold water cooler, a vacuum vibration is applied to the lower reservoir 2b. Complex (Vaccum Swing Adsorption: VSA) is characterized in that by way of stirring an oxygen and oxygen stirred cold water pump 73 that circulates made in an oxygen generator using a zeolite Bad is connected.

Figure 1 is a longitudinal cross-sectional schematic view showing a chiller according to the present invention, Figure 2 is a longitudinal sectional view showing in detail the upper end of the chiller according to the present invention.

The oxygen generator 71 is provided in the lower space 15.

The oxygen generator 71 uses a zeolite bed and pressure swing adsorption (hereinafter referred to as "PSA") and a zeolite bed and vacuum swing adsorption (hereinafter referred to as "VSA"). The method of using and the method of using electrolysis are known. In order to make a compact, low noise indoor water cooler, the PSA type product is relatively large in size and noise, making it difficult to apply. In addition, the electrolysis method has a disadvantage in that a very small amount of oxygen is generated, so unless a separate high-efficiency dissolved system is provided, the amount of oxygen supplied is very small to produce a substantial amount of oxygen. In this case, therefore, a highly efficient dissolved system using a high pressure large capacity pump is required, which causes very loud noise.

In addition, the bigger problem is that the electrolysis generates oxygen by the decomposition of the water by the electrode plate, so if the very pure water is not used, foreign matters are attached to the electrode plate, which shortens the life of the electrode plate and the generation of oxygen is undesired. The method of supplying water for electrolysis becomes very important.

To solve this problem, it is necessary to use a filter and the like, and a problem that needs to be replaced periodically occurs.

Therefore, the VSA method is effective for the compact oxygen generator 71 having a high purity proper flow rate.

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

However, this method has the advantage of low noise and low cost because no separate dissolved device is required, but the rate of dissolving oxygen in cold water is low and its concentration is low because of the large size of oxygen bubbles made in airstone. Therefore, there is a problem that the oxygen generator must be operated for a long time to make oxygen dissolved cold water above a certain level.

As such, when the oxygen generator 71 in which the motor is mounted for a long time to increase the dissolved amount is heated, the oxygen generator itself generates heat, resulting in a very low durability and gradually increasing noise.

Therefore, in order to solve this problem, the present invention has been made to minimize the operating time of the oxygen generator 71 and increase the dissolved efficiency of oxygen.

In other words, the cycle for one hour after the operation of the oxygen generator 71 for 20 minutes and the cycle for one hour after the operation of the oxygen generator 71 can quantitatively have about three times more durability.

Another oxygen dissolving method is to increase the dissolution efficiency by mixing oxygen and cold water to make the oxygen bubble small by passing the orifice tube at high pressure. In order to achieve higher efficiency, a method of passing hollow fiber membranes is also used. However, this method uses a high pressure to pass a mixture of cold water and oxygen at a high pressure, and requires a relatively large capacity pump for high pressure. There are disadvantages.

In general, most people do not notice much noise when the noise measured at a distance of 1m from the front of the water cooler is 45dB or less. However, if the noise measured at a distance of 1m away from the front of the water cooler in the room is more than 50dB, the noise starts to be detected. When passing the orifice tube at high pressure, the noise measured at a distance of 1m from the front of the water cooler rises above 50dB.

In the present invention, since oxygen is produced by the oxygen generator 71 using the zeolite bed of the VSA method, the heat generation of the oxygen generator 71 itself is severe, which effectively prevents the conventional problem of poor durability, and is 1 m away from the front of the water cooler. Noise measured at distance can be lowered to less than 45db.

In addition, the present invention is connected to the oxygen stirring pump 73 for circulating and supplying the cold water and oxygen produced by the oxygen generator 71 to the lower reservoir (2b) at the bottom of the lower reservoir (2b), the lower side The oxygen may be better dissolved in the cold water stored in the reservoir 2b.

One side of the oxygen stirring pump 73 is connected to the oxygen / cold water mixture supply unit for supplying a mixture of cold water and oxygen into the lower reservoir (2b), the other side to the cold water lower reservoir (2b) The cold water inlet pipe 74 which sucks the stored cold water into the oxygen stirring pump 73 is connected.

Preferably, the oxygen stirring pump 73 is a magnetic motor.

The concentration of oxygen produced in the oxygen generator 71 of the cold water according to the present invention is 60% or more, the oxygen flow rate is 0.05 ~ 0.5L / min, the concentration of oxygen dissolved in cold water is 40ppm or more.

The oxygen generated in the oxygen generator 71 and the water in the reservoir 2 are strongly stirred / discharged using the oxygen stirring pump 73 to quickly raise the dissolved concentration of 3 liters of cold water to 40 ppm or more within 20 minutes.

Common cold water has dissolved oxygen of about 5 to 15 ppm.

The capacity of the oxygen stirring pump 73 is 2000-3700rpm level, and the suction stage is made T-type, so that the oxygen supplied from the oxygen generator and the water of the reservoir can be sucked at the same time, and the oxygen supply flow rate of the oxygen generator is 0.05. It is preferable to bring to 0.5 L / min so that the water and oxygen in a reservoir may circulate-feed.

When it is less than 2000rpm, the stirring effect is inferior, and when it is larger than 3700rpm, the noise becomes loud. When the oxygen supply flow rate is also less than 0.05, the dissolution rate decreases. When the oxygen supply flow rate is larger than 0.5, the increase in the dissolution rate is minimal.

The most suitable oxygen agitation pump can be used for this purpose. However, it is preferable to use magnetic motor in consideration of noise, corrosion resistance and durability.

In addition, the concentration of oxygen generated in the oxygen generator should be more than 60%. If it is less than that, the oxygen concentration is not enough to minimize the operating time of the oxygen generator, and the oxygen concentration within the minimum operation time (less than 20 minutes). If it can not raise the operating time is long, it will act as a cause of noise increase.

1 and 3, the cold water according to the present invention is connected to the normal temperature water discharge pipe 91 at the bottom of the upper reservoir 2a, and the normal temperature water discharge pipe 91 is connected to the normal temperature water by the normal temperature connection pipe 92. And connected to the cold water discharge (H), the room temperature water connection pipe 92 is installed on the inclined downwards with an θ1 of 15 ~ 45 ° and the imaginary line (XX) to be parallel to the bottom surface of the reservoir (2) It has a structure in which the heating member 93 which is a ceramic heater is attached to the normal temperature water connection pipe 92 installed inclined as mentioned above.

3 is an enlarged view of the normal temperature water connecting tube 92 and the heating member 93.

In the conventional cold water supply method, the room temperature water supply method uses a method of heating the water in the connection pipe by using the heating member 65 when taking water from the upper reservoir 2a as shown in FIG. 4. In this method, as the angle of the second connecting tube 63 is bent at 90 °, the temperature around the heating member 65 is heated to the heat generated by the heater, so that the local overheating occurs. The heated hot water flowed into the furnace was not free, so the heating of the room temperature part was low. In addition, heat convection is distributed to the outlet side and the reservoir side, the supply capacity of the normal temperature water is small, there was a disadvantage that the heating member 65 is overloaded.

In order to solve this disadvantage, in the present invention, as shown in FIGS. 1 and 3, the normal temperature water connection tube 92 is formed at an angle of 15 to 45 ° with an imaginary line XX that is parallel to the bottom surface of the reservoir 2. It is installed inclined downward at (theta) 1), and the heating member 93 attached to the normal temperature water connection pipe 92 is also installed inclined like the normal temperature water connection pipe 92.

Therefore, the height of the outlet means 92B of the normal temperature water connection pipe is kept lower than the height of the entry means 92A of the normal temperature water connection pipe.

Thus, the hot water in the normal temperature water connecting pipe 92 heated by the heating member 93 is easily convex to the inlet means 92A above the outlet means 92B to exchange heat with water in the upper reservoir 2a. By repeating, the temperature of the inlet means 92A is maintained at a room temperature of about 17 ° C., and the temperature in the normal temperature water connecting tube in contact with the heating member 93 is maintained at about 60 ° C. to overload the heating member 93. Prevent.

At this time, when the temperature of the heating member 93 is 110 ℃ or more may cause a decrease in durability and safety problems due to the overload of the heating member, if the temperature is below 90 ℃ the temperature of the entry means is maintained at 17 ℃ or less room temperature water It is difficult to supply smoothly.

If the angle θ1 of the normal temperature water connection tube is less than 15 °, convection of hot water is not smooth, so that the temperature of the water in the upper reservoir 2a falls below 15 °, and if it exceeds 45 °, the convection of water is good, but As the internal space increases by the size, the size of the whole product increases.

It is preferable that the bending angle (theta) 2 of the inlet means 92A side of a normal temperature water connection pipe | tube is 110 degrees, and the bending angle (theta) 3 toward the outlet means 92B is 90 degrees.

On the other hand, a cold water discharge pipe 94 is provided at the lower end of the lower reservoir 2b, and one side of the cold water discharge pipe 94 and one side of the cold water discharge pipe 92 are connected to the cold water / normal temperature water discharge part (H).

The cold water / room temperature water discharge unit (H) is selected from the cold water and room temperature water outlet (H1) and the cold water / room temperature water outlet (H1) by selecting one of the cold water and room temperature water by a separate selection button (not shown) .

An example of the cold water machine A of this invention is demonstrated, referring FIGS. 1 to 2, the inside of the water cooler main body 1 is divided into three in the vertical direction by the upper and lower mounting plates 11 and 12, and the upper space 13 and the central space ( 14) and the lower space 15.

The reservoir 2 is arranged in the upper space 13 of the water cooler main body 1. The reservoir 2 is formed in a tubular shape with a bottom consisting of a flat rectangular bottom portion 21 and a circumferential wall portion 22 extending upward from an outer circumferential edge of the bottom portion 21. It is opened.

An opening 16 is formed in the upper end surface of the water cooler main body 1, and the upper end of the water storage tank 2 is opened so that the upper opening part of the water storage tank 2 is located below the opening 16 vertically. The end part is being fixed to the cooler main body 1. As shown in FIG.

Moreover, the container mounting member 3 is integrally provided in the opening part 16 of the water cooler main body 1. As shown in FIG. The container mounting member 3 includes a support part 3a comprising a flat circular bottom part 31, a cylindrical circumferential wall part 32 extending upward from an outer peripheral edge of the bottom part 31, and the support part 3a. The mounting part 3b integrally provided in the bottom part 31 of () is provided. Moreover, the through hole 3c which penetrates between the inner and outer surfaces of the support part 3a is formed in the bottom part 31 of the support part 3a, and the extending part of the circumferential wall part 32. As shown in FIG.

The circumferential wall portion 32 of the supporting portion 3a of the container mounting member 3 has a cylindrical portion 32a having a lower inner portion having a constant inner diameter, and an inner diameter extending outwardly toward the upper end of the cylindrical portion 32a and gradually upward. This enlarged bowl-shaped container support part 32b is provided.

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 circularly toward the outer side, and this container B is made by this inner peripheral surface 321b. It is configured to support the upper part B2).

In addition, a ring-shaped horizontal portion 33 extends over the entire circumference of the upper edge of the circumferential wall portion 32 of the support portion 3a of the container mounting member 3, and the outer circumferential edge of the horizontal portion 33 The outer wall part 34 is extended toward the vertical downward over the whole circumference.

Moreover, the mounting part 3b is integrally provided in the bottom part 31 of the support part 3a of the container mounting member 3. The mounting portion 3b is formed in a cylindrical shape with a bottom having a predetermined length in which the upper end is closed and the lower end is opened entirely. The mounting portion 3b penetrates through the bottom portion 31 of the support portion 3a with the closed upper portion upward. As a result, the lower end portion protrudes downward from the lower surface of the bottom portion 31 of the support portion 3a.

In addition, the upper end part of the mounting part 3b is formed in the state which the distribution hole parts 35 and 35 which penetrate across the inner and outer peripheral surfaces faced in the radial direction, and this distribution hole part 35 and 35 and the mounting part ( The inner side and the outer side of the support part 3a communicate with each other through the space part in 3b).

When the container B, such as a PET bottle, is arranged in the support part 3a of the container mounting member 3 with its opening downward, the upper part B2 of the container B is the inner peripheral surface 321b of the container support part 32b. ), The spout portion B1 of the container B is fitted to the upper end of the mounting portion 3b of the container mounting member 3. In this state, the distribution hole parts 35 and 35 of the mounting part 3b are located in the spout part B1 of the container B. As shown in FIG.

By inserting the container mounting member 3 into the opening 16 of the water cooler body 1 from above, the outer wall portion 34 of the support portion 3a of the container mounting member 3 opens the opening of the water cooler body 1. The container mounting member 3 is integrated in the opening 16 of the water cooler main body 1 in a state of being in contact with the inner circumferential surface 16a of the 16.

The support part 3a of the container mounting member 3 is in the state in which the cylindrical part 32a is located in the water storage tank 2 except the upper end part, and the container B was attached to the container mounting member 3, WHEREIN: It is comprised so that the opening end (lower end) of the spout part B1 of the container B may be located below the upper end of the water storage tank 2.

Moreover, the partition plate 4 is arrange | positioned at the center part of the up-down direction in the water storage tank 2. The partition plate 4 is formed in the same shape as the bottom portion 21 of the water storage tank 2 and one size smaller than the bottom portion 21, and the partition plate 4 has an upper and lower sides in the water storage tank 2. While partitioned by the reservoirs 2a and 2b, a gap 2c is formed over the entire circumference between the outer circumferential edge of the partition plate 4 and the inner circumferential surface of the reservoir 2 facing the outer circumferential edge, The upper and lower reservoir portions 2a and 2b are connected and communicated by the gap 2c.

And the cylindrical ice control part 41 is integrally provided in the outer peripheral edge of the partition board 4 over the whole periphery, and this ice control part 41 is carried out in the lower reservoir 2b. It is comprised so that the formed ice may not intrude into the upper reservoir 2a.

In addition, a cylindrical oxygen retaining plate 42 having a predetermined height is integrally provided at the outer peripheral edge of the lower surface of the partition plate 4 so as to surround the connecting pipe portion 46 to be described later. ) And the partition plate 4 portion surrounded by the oxygen holding plate 42, the oxygen space portion 43 is formed, and oxygen supplied from the oxygen supply portion 7 by the oxygen space portion 43 is formed. It is comprised so that the oxygen layer 43a can be formed.

On the other hand, the upper surface of the partition plate 4 has a diameter smaller than that of the oxygen retaining plate 42 and has a cylindrical shape of a certain height having a diameter larger than the cylindrical portion 32a of the support portion 3a of the container mounting member 3. The partition wall 44 protrudes upward so as to surround the connecting pipe portion 46, which will be described later, and the lower end portion of the support portion 3a of the container mounting member 3 is located in the upper portion of the partition wall 44. Moreover, it is comprised so that the upper end of the partition wall 44 may be located below the opening end (lower end) of the spout part B1 of the container B attached to the mounting part 3b of the container mounting member 3.

In the partition plate 4 portion surrounded by the partition wall 44, a plurality of bulging portions 45 are formed by expanding the partition plate 4 upward in a semicircular shape, and the apex of each of the bulging portions 45 is formed. The oxygen distribution hole 45a penetrates between the upper and lower sides, and the oxygen retained in the oxygen space portion 43 intermittently intersects the partition plate 4 through the oxygen distribution hole 45a. It is comprised so that it may be supplied to the upper storage part 2a. In addition, the diameter of the oxygen distribution hole 45a is usually 2.5 mm or less, preferably 1 to 2 mm.

In addition, a connecting pipe portion 46 having a predetermined length is integrally provided in the center portion of the partition plate 4 while the partition plate 4 penetrates in the vertical direction, and the connecting pipe portion 46 is formed therein. It has a through hole penetrating in the up and down direction, the upper opening of the through hole is located at a position slightly away from the lower opening of the lower end of the mounting portion 3b of the container mounting member 3, while the lower opening of the through hole is Room temperature discharge pipe 91 is connected.

1: chiller body 2: reservoir
2a: upper reservoir 2b: lower reservoir
2c: clearance 3: container mounting member
3a: support part 3b: mounting part
4: partition plate 41: ice regulation unit
42: oxygen holding plate 43: oxygen space
43a: oxygen layer 44: partition wall
45a: through hole 46: connector
5: discharge member 5a: discharge portion
5b: cover part 53: discharge pipe
54 tube portion 55c opening
61: first connecting tube 62: first water faucet
63: second connection pipe 64: second water faucet
65, 93: heating member 7: oxygen / hot water mixture supply
8: cooling tube A: cold water machine
B: container B1: spout
73: oxygen stirring pump 74: cold water inlet pipe
91: normal temperature discharge pipe 92A: inlet end of the normal temperature water connection pipe
92: normal temperature connection tube 92B: outlet end of the normal temperature connection tube
XX: imaginary line parallel to the bottom of the reservoir
94: cold water discharge pipe H: cold water / room temperature water discharge section
H1: Cold water / cold water outlet
θ1: Angle of inclination between line XX and room temperature water pipe
θ2: normal temperature water inlet end bending angle θ3: normal temperature water outlet end bending angle

Claims (5)

A water tank is arranged in the body of the water cooler, and an upper end of the water tank is provided with a container mounting member for freely mounting the container, and is configured to supply water in the container mounted on the container mounting member to the water tank. In addition, the reservoir is divided into an upper reservoir portion and a lower reservoir portion by a partition plate, and the upper reservoir portion and the lower reservoir portion are connected and communicated in part, and the cooling means is arranged on the lower reservoir portion. In the cold water machine configured to be able to cool the water in the lower reservoir, and to be able to separately extract the water in the upper reservoir and the water in the lower reservoir,
The lower reservoir part is connected to an oxygen stirring pump for agitating and circulating cold oxygen and oxygen produced in an oxygen generator using a vacuum swing adsorption (VSA) type zeolite bed, and at the bottom of the upper reservoir part a room temperature discharge pipe. Is installed, the room temperature water discharge pipe is connected to the room temperature and cold water discharge portion (H) by the room temperature water connection pipe, the room temperature water connection pipe is an angle of 15 ~ 45 ° with the imaginary line (XX) parallel to the bottom surface of the reservoir and a heating member, which is a ceramic heater, is attached to the room temperature water connection pipe which is inclined downward at (θ1) and is inclined as described above. delete The cold water machine according to claim 1, wherein the concentration of oxygen produced in the oxygen generator is 60% or more, the oxygen flow rate is 0.05-0.5 L / min, and the concentration of oxygen dissolved in cold water is 40 ppm or more. The chiller of claim 1, wherein the oxygen stirring pump is a magnetic motor. The chiller according to claim 1, wherein the noise measured at a distance of 1 m from the front of the chiller is 45 db or less.

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