Water treatment apparatus capable of preventing flowing backward of hot water

Abstract

The purpose of the present invention is to provide a water treatment device capable of preventing backflow of hot water through a simple structure. To implement this, the water treatment device of the present invention comprises: a first tank for storing water; a second tank for storing hot water generated by heating water supplied from the first tank, having an air outlet formed on its upper surface for discharging air, and installed at an angle such that one side of the upper surface where the air outlet is formed is higher than the other side of the upper surface; a supply pipe connecting the water of the first tank to the second tank; and an air vent pipe having one end connected to the air outlet for discharging air inside the second tank.

Description

Technology Field

[0001] The present invention relates to a water treatment device capable of preventing hot water backflow, and more specifically, to a water treatment device capable of preventing hot water from flowing back from a tank storing hot water to a tank storing purified water or cold water. Background Technology

[0002] Inside the water purifier, there is a filter for filtering raw water such as tap water, a water purification tank for storing purified water filtered by the filter, and a hot water tank for storing hot water heated from the purified water.

[0003] The above-mentioned hot water tank and water purification tank are connected by an inlet pipe, so that purified water from the water purification tank flows into the hot water tank, and the water flowing into the hot water tank is heated to produce hot water.

[0004] An air vent pipe is connected to the upper part of the hot water tank to allow air inside the hot water tank to be discharged into the internal space of the water purification tank. Air accumulated in the upper space of the hot water tank during the process of the tank becoming full as purified water flows into it, and bubbles generated during the heating of the hot water inside the tank and accumulated in the upper space of the hot water tank, are designed to be discharged into the water purification tank through the air vent pipe.

[0005] However, the air in the upper space of the hot water tank is not confined solely to the area where the air vent pipe is connected, but can be dispersed throughout the entire upper space. In such cases where the air is dispersed, some air is not discharged through the air vent pipe and remains in the upper space of the hot water tank.

[0006] The air remaining in the upper space of the hot water tank expands in volume when the hot water is heated, and the hot water in the hot water tank can flow back into the water purification tank through the air vent pipe due to the expanded volume of air.

[0007] In addition, if the hot water around the part where the inlet pipe is connected in the hot water tank is heated, the hot water may flow back into the purified water tank through the inlet pipe.

[0008] If hot water flows back into the water purification tank in this way, it mixes with the purified water inside the tank, causing the temperature of the purified water to rise. Since purified water is not dispensed at the temperature desired by the consumer, this leads to dissatisfaction regarding the water temperature.

[0009] Korean Registered Patent No. 10-0619159 has been disclosed as a prior art capable of preventing such hot water backflow.

[0010] The aforementioned prior art is equipped with a backflow prevention valve to prevent hot water heated to a high temperature by a heater from flowing back through the inlet pipe. However, installing the backflow prevention valve had the problem of increasing the number of parts and making the structure complex. The problem to be solved

[0011] The present invention was devised to solve the aforementioned problems, and its purpose is to provide a water treatment device capable of preventing backflow of hot water through a simple structure. means of solving the problem

[0012] A water treatment device capable of preventing hot water backflow according to the present invention for achieving the above objective comprises: a first tank for storing water; a second tank for storing hot water generated by heating water supplied from the first tank, having an air outlet formed on its upper surface for discharging air, and installed at an angle such that one side of the upper surface where the air outlet is formed is higher than the other side of the upper surface; a supply pipe connecting to supply water from the first tank to the second tank; and an air vent pipe having one end connected to the air outlet for discharging air inside the second tank. Effects of the invention

[0013] According to the present invention, by installing the hot water tank at an angle, the backflow of hot water from the hot water tank into the purified water tank is prevented, thereby resolving consumer complaints regarding the rise in the purified water temperature.

[0014] In addition, if the hot water tank is installed at an angle to prevent backflow of hot water, there is no need to mold the tank into an inclined shape, which simplifies the manufacturing process and prevents an increase in manufacturing costs.

[0015] In addition, the hot water tank can be installed at an angle, and the water inside the tank can be completely drained by connecting the hot water drain pipe to the lowest position of the angled hot water tank.

[0016] In addition, by positioning the heater in an optimal vertical location inside the hot water tank, backflow of hot water into the purified water tank is prevented, and hot water can be supplied smoothly. Brief explanation of the drawing

[0017] FIG. 1 is a perspective view showing a configuration in which a hot water tank, a purified water tank, and an outlet are connected in a water treatment device according to the present invention. FIG. 2 is a side view of the configuration shown in FIG. 1. Figure 3 is a vertical cross-sectional view of the hot water tank seen from the front. Figure 4 is a vertical cross-sectional view of the hot water tank viewed from the side. FIG. 5 is a drawing showing the state in which a hot water tank is coupled to a fixed member coupling frame. Specific details for implementing the invention

[0018] The present invention will be described in detail below with reference to the attached drawings.

[0019] A water treatment device (1) according to the present invention will be described with reference to FIGS. 1 to 4.

[0020] The above water treatment device (1) comprises a first tank (100) for storing water, a second tank (200) for storing hot water generated by heating water supplied from the first tank (100) and having an air outlet (202) formed on its upper surface (200a) for discharging air, and installed at an angle such that one side of the upper surface (200a) where the air outlet (202) is formed is higher than the other side of the upper surface (200a), a supply pipe (310) connected to supply water from the first tank (100) to the second tank (200), and an air vent pipe (320) having one end connected to the air outlet (202) to discharge air inside the second tank (200).

[0021] In the following description of directions, the left side where the air outlet (202) is formed in the second tank (200) based on FIG. 2 is the front, and the right side, which is the opposite direction, is the rear.

[0022] The first tank (100) is composed of a first tank body (110) that stores water in its internal space and has an open top, and a first tank cover (120) that covers the open top of the first tank body (110).

[0023] The water stored in the first tank (100) may consist of purified water filtered in a filter unit (not shown). Additionally, the first tank (100) may be further equipped with a cooling unit (not shown) for cooling the purified water, thereby allowing the storage of cold water generated by cooling the purified water. Furthermore, a dividing plate (not shown) may be provided to divide the internal space of the first tank (100), and the tank may be configured such that purified water is stored in one side of the space separated by the dividing plate, and cold water is stored in the other side. Below, the first tank (100) is described as a water purification tank, and the case in which the water stored inside it consists of purified water is explained as an example.

[0024] The second tank (200) is a hot water tank located at the bottom of the first tank (100), and receives purified water from the first tank (100) through the supply pipe (310), heats it with a heater (220) to produce hot water, and then stores it.

[0025] An air outlet (202) is formed on the front side, which is one side of the upper surface (200a) of the second tank (200), and an inlet (201) to which the lower end of the supply pipe (310) is connected is formed on the rear side, which is the other side of the lower surface (200b) of the second tank (200) opposite to the side where the air outlet (202) is formed.

[0026] The air outlet (202) is provided with a pipe-shaped air vent connection part (203) that protrudes upward from the upper surface (200a) of the second tank (200) and is connected to the lower end of the air vent pipe (320).

[0027] In front of the upper surface (200a) of the second tank (200), a pipe-shaped hot water outlet connection part (204) is provided, which protrudes upward from the upper surface (200a) of the second tank (200) and is connected to one end of the hot water outlet pipe (350).

[0028] A temperature sensor (210) for measuring the temperature of hot water stored inside the second tank (200) is provided on the front side of the second tank (200), and a heater (220) for heating the hot water is provided in the internal space of the second tank (200). When the temperature sensor (210) detects that the temperature of the hot water has reached a set temperature, the heater (220) is turned off to prevent the temperature of the hot water from rising further.

[0029] The temperature sensor (210) is positioned close to the hot water outlet connection (204) to measure the actual temperature of the hot water being discharged.

[0030] Additionally, the installation location of the temperature sensor (210) can be set considering the amount of hot water being discharged. Since only water at a location higher than the installation location of the temperature sensor (210) maintains the set temperature, if the installation location of the temperature sensor (210) is too high, for example, even if only a amount of hot water equivalent to one cup is discharged, all the hot water that satisfies the set temperature is discharged; if a larger amount of hot water is discharged, hot water below the set temperature is discharged, which may cause consumer dissatisfaction regarding the hot water temperature. Furthermore, if the installation location of the temperature sensor (210) is too low, it may take too long for the temperature detected by the temperature sensor (210) to reach the set temperature, and a difference may occur between the actual hot water temperature being discharged and the detected temperature. It is desirable to set the installation location of the temperature sensor (210) by considering these points.

[0031] If the temperature sensor (210) is positioned at the front of the second tank (200) and the inlet (201) is positioned at the rear of the second tank (200) (right side of FIG. 2), the temperature sensor (210) and the inlet (201) can be spaced as far apart as possible. As a result, the purified water introduced through the inlet (201) is completely mixed inside the second tank (200) and then discharged through the hot water outlet connection (204) near the temperature sensor (210), thereby preventing the hot water temperature measured by the temperature sensor (210) from being affected by the low-temperature purified water introduced through the inlet (201).

[0032] A hot water drain pipe (330) for draining hot water from the second tank (200) is connected to the rear side of the lower surface (200b) of the second tank (200), which is opposite to the side where the air outlet (202) is formed in the second tank (200).

[0033] The second tank (200) of the commercial building is formed in a roughly rectangular shape, and in the vertical cross-sectional shape shown in FIG. 2, the vertical height is lower than the horizontal length. In this case, the upper surface (200a) and the lower surface (200b) of the second tank (200) are formed parallel to each other.

[0034] In this way, when the upper surface (200a) and the lower surface (200b) of the second tank (200) are formed parallel to each other, the air inside the second tank (200) is not discharged through the air vent pipe (320) and remains in the upper space of the second tank (200).

[0035] If air remains in the upper space of the second tank (200), when the hot water in the second tank (200) is heated, the hot water flows back into the first tank (100) through the air vent pipe (320) due to the expansion of the air.

[0036] Accordingly, in order to prevent air from remaining in the upper space of the second tank (200), the second tank (200) is installed inside the water treatment device (1) in an inclined state. In this case, the inclined direction of the second tank (200) is installed such that the front side, which is one side of the upper surface (200a) where the air outlet (202) is formed, is higher than the rear side, which is the other side of the upper surface (200a) located above the inlet (201).

[0037] When the second tank (200) is installed at an angle in this manner, the upper surface (200a) becomes inclined, so the air inside the second tank (200) gathers around the air outlet (202) located at the highest position in the upper space of the second tank (200) and is smoothly discharged to the first tank (100) through the air outlet (202). Therefore, it is possible to prevent hot water from flowing back through the air vent pipe (320) due to the air remaining in the upper space of the second tank (200).

[0038] In addition, since the hot water drain pipe (330) is connected to the rear of the lower surface (200b) of the second tank (200), if the second tank (200) is installed at an angle, the position where the hot water drain pipe (330) is connected in the second tank (200) becomes the lowest position, so the water inside the second tank (200) can be completely drained.

[0039] As a method to make the upper surface (200a) of the second tank (200) inclined, in addition to the method of installing the entire second tank (200) inclined, a method can be considered in which the lower surface of the second tank (200) is horizontal and the upper surface is formed inclined. In order to form the upper surface of the second tank (200), a two-stage molding process is required. That is, since the upper surface of the second tank (200) must be formed flat using a mold and then additionally formed inclined using another mold, the manufacturing process becomes complex due to the two-stage molding process and additional molds are required, thereby increasing manufacturing costs.

[0040] In contrast, if the second tank (200) is installed at an angle as in the present invention, the shape of the fixing frame (500; FIG. 5), which is a part for fixing the second tank (200), only needs to be formed to correspond to the angle of inclination of the second tank (200), so the manufacturing process of the second tank (200) becomes simple and the manufacturing cost can be prevented from increasing.

[0041] The heater (220) comprises a pair of terminal pins (220d, 220e) protruding downward from the lower surface (200b) of the second tank (200), a pair of non-heating parts (220a, 220b) each connected to the pair of terminal pins (220d, 220e) and protruding upward from the lower surface (200b) of the second tank (200), and a heating part (220c) connected between the pair of non-heating parts (220a, 220b) and wound in a coil shape multiple times. When power is applied through the terminal pins (220d, 220e), heat is generated in the heating part (220c) to heat the water in the second tank (200).

[0042] If the heating element (220c) is installed at a position too high inside the second tank (200), the hot water above the heating element (220c) in the internal space of the second tank (200) may boil first and flow back through the air vent pipe (320) before the temperature of the hot water detected by the temperature sensor (210) reaches the set temperature.

[0043] In addition, if the heating element (220c) is installed at a position too low inside the second tank (200), there is a problem that it takes a long time to raise the hot water temperature to the set temperature.

[0044] Additionally, if the heating element (220c) is located too low inside the second tank (200) and close to the inlet (201), the hot water in the second tank (200) may flow back into the first tank (100) through the inlet (201) and the supply pipe (310). That is, the internal space of the second tank (200) is connected to the supply pipe (310) through the inlet (201), and the heat of the hot water inside the second tank (200) is transferred to the purified water inside the supply pipe (310), causing the temperature of the purified water inside the supply pipe (310) to rise, and the purified water whose temperature has risen inside the supply pipe (310) flows back into the first tank (100), causing the temperature of the purified water inside the first tank (100) to rise.

[0045] To solve these problems, the heating element (220c) is spaced upward from the lower surface (200b) of the second tank (200), and is installed so that the horizontal centerline (C) in the vertical direction of the second tank (200) overlaps with the vertical width (W) of the heating element (220c). For example, the horizontal centerline (C) of the second tank (200) can be configured to coincide with the centerline of the vertical width (W) of the heating element (220c).

[0046] As shown in FIG. 2, the heating element (220c) can be wound along the long front-back direction when the vertical cross-section of the second tank (200) is a rectangle with a long front-back length and a low height.

[0047] In addition, as an embodiment different from that shown in FIG. 2, the second tank (200) of FIG. 2 may be installed in a state rotated 90 degrees. In this case, if the shape of the vertical cross-section of the second tank is a rectangle with a short length in the front-rear direction and a high height, the heating element may be wound along the long vertical direction.

[0048] As shown in FIG. 3, the heating element (220c) is installed at a first height (H1) above the inlet (201) of the second tank (200). The first height (H1) represents the distance from the bottom surface (200b) of the second tank (200) to the bottom of the heating element (220c). The first height (H1) can be set within the range of 1 / 4 to 1 / 2 of the second height (H2), which is the distance from the bottom surface (200b) of the second tank (200) to the top surface (200a). By separating the heating element (220c) from the inlet (201) in this way, the temperature of the hot water near the inlet (201) does not become excessively high, thereby minimizing the backflow of hot water through the inlet (201) and the supply pipe (310).

[0049] By optimizing the position of the heating element (220c) as described above, the temperature of the hot water being discharged can be adjusted to the set temperature, and the amount of hot water being discharged can be secured at a certain amount or more, thereby allowing for the smooth supply of hot water.

[0050] The upper part of the air vent pipe (320) is connected to the first tank cover (120) provided on the upper part of the first tank (100) and is configured to communicate with the internal space of the first tank (100). Air from the internal space of the second tank (200) is discharged into the internal space of the first tank (100) through the air outlet (202) and the air vent pipe (320).

[0051] The first tank cover (120) has a cover hole (not shown) formed therein, and a thin film-shaped filter (not shown) is provided in the cover hole. Air from the second tank (200) introduced into the internal space of the first tank (100) through the air vent pipe (320) passes through the cover hole and the filter and is discharged to the outside.

[0052] A water outlet (400) is provided, comprising a water outlet (410) for discharging purified water from the first tank (100) and a hot water outlet (420) for discharging hot water from the second tank (200).

[0053] The lower surface of the above-mentioned purified water outlet (410) and the first tank (100) is connected by a purified water outlet pipe (340), and the hot water outlet (420) and the hot water outlet connection part (204) provided on the upper surface (200a) of the second tank (200) are connected by a hot water outlet pipe (350).

[0054] On the upper surface (200a) of the second tank (200), an air discharge guide (200c) may be formed in the portion where the air discharge port (202) is formed, which is inclined and protrudes upward toward the center of the air discharge port (202). Due to the air discharge guide (200c), air is guided to the air discharge port (202), allowing the air to be discharged more smoothly into the air vent pipe (320).

[0055] Referring to FIGS. 3 to 5, a structure for installing the second tank (200) at an angle on the fixed frame (500) will be described.

[0056] On the upper surface (200a) of the second tank (200), a plurality of fixing members (231, 232, 233) are provided for installing the second tank (200) on a fixing frame (500).

[0057] The plurality of fixing members (231, 232, 233) may consist of a first fixing member (231), a second fixing member (232), and a third fixing member (233) coupled to the upper surface (200a) where the air outlet (202) is formed in the second tank (200). The first to third fixing members (231, 232, 233) are sequentially coupled from the front to the rear of the upper surface (200a) of the second tank (200).

[0058] The first fixing member (231) is formed in the shape of a plate with a narrow width and a long length in the front-rear direction and is composed of a first tank coupling part (231a) that is coupled to the front of the upper surface (200a) of the second tank (200), a first connecting part (231b) that is bent upward and extended from the front end of the first tank coupling part (231a), and a first frame coupling part (231c) that is bent forward and extended from the top of the first connecting part (231b) and has a first fastening hole (231d) formed therein.

[0059] The second fixing member (232) is formed in the shape of a plate that is narrow in width and long in the left-right direction, and comprises a second tank coupling part (232a) coupled to one side of the upper surface (200a) of the second tank (200) in the middle portion, a second connecting part (232b) that is bent upward and extended from one end of the second tank coupling part (232a), and a second frame coupling part (232c) that is bent and extended in one direction from the top of the second connecting part (232b) and has a second fastening hole (232d) formed therein.

[0060] The third fixing member (233) is formed in the shape of a plate that is narrow in width and long in the left-right direction and comprises a third tank coupling part (233a) coupled to the rear side of the upper surface (200a) of the second tank (200), a third connecting part (233b) that is bent upward and extended from the end of the third tank coupling part (233a), and a third frame coupling part (233c) that is bent and extended in the other direction from the top of the third connecting part (233b) and has a third fastening hole (233d) formed therein.

[0061] The above first to third fixed members (231, 232 , 233) may all be formed at the same height, or they may be formed at different heights.

[0062] The above fixed frame (500) has a first fixing part (501), a second fixing part (502), and a third fixing part (503) formed therein to which the first to third fixing members (231, 232, 233) are coupled. The above fixed frame (500) can be manufactured as a single unit by injection molding using a synthetic resin material.

[0063] The first fixing part (501) has a first mounting surface (501b) formed thereon so that the first frame coupling part (231c) can be seated thereon, and a first fastening groove (501a) is formed on the upper surface, which is concave downward so that the first fastening member (510) is fastened thereon. With the first frame coupling part (231c) seated on the first mounting surface (501b) of the first fixing part (501), the first fastening member (510) is fastened to the first fastening hole (231d) and the first fastening groove (501a), thereby fixing the first fixing member (231) to the first fixing part (501).

[0064] In the second fixing part (502) and the third fixing part (503), second and third mounting surfaces (502b, 503b) are formed so that the second frame coupling part (232c) and the third frame coupling part (233c) can be seated respectively, and in each second and third mounting surface (502b, 503b), a second fastening groove (502a) and a third fastening groove (503a) are formed so as to be concave downwardly so that the second fastening member (520) and the third fastening member (530) are respectively fastened. With the second frame coupling part (232c) and the third frame coupling part (233c) respectively seated on the second mounting surface (502b) of the second fixing part (502) and the third mounting surface (503b) of the third fixing part (503), the second fastening member (520) is fastened to the second fastening hole (232d) and the second fastening groove (502a) to fix the second fixing member (232) to the second fixing part (502), and the third fastening member (233) is fastened to the third fastening hole (233d) and the third fastening groove (503a) to fix the third fixing member (233) to the third fixing part (503).

[0065] The first to third mounting surfaces (501b, 502b, 503b) of the first to third fixing parts (501, 502, 503) are formed to be inclined. Accordingly, when the first to third frame coupling parts (231c, 232c, 233c) are mounted on the inclined first to third mounting surfaces (501b, 502b, 503b), the second tank (200) is installed in an inclined state at an angle of inclination identical to the angle of inclination of the first to third mounting surfaces (501b, 502b, 503b).

[0066] The first to third seating surfaces (501b, 502b, 503b) may be formed on the same inclined plane, or each may be formed on a plurality of different inclined planes.

[0067] When the first to third mounting surfaces (501b, 502b, 503b) are formed on the same inclined plane, the first to third fixing members (231, 232, 233) are all formed at the same height, so that the second tank (200) can be installed at an angle of inclination equal to the angle of inclination of the first to third mounting surfaces (501b, 502b, 503b).

[0068] In addition, if the first to third mounting surfaces (501b, 502b, 503b) are not formed on the same plane but on multiple different inclined planes, the second tank (200) can be installed at a desired angle of inclination by making the heights of the first to third fixing members (231, 232, 233) different from each other. In this case, the first to third mounting surfaces (501b, 502b, 503b) may be formed at a higher position the closer the mounting surface is to the air outlet (202). That is, the first to third mounting surfaces (501b, 502b, 503b) can be formed such that the first mounting surface (501b) located at the foremost position is the highest, the second mounting surface (502b) located in the middle position is the next highest, and the third mounting surface (503b) located at the rear position is the lowest position, and accordingly, the height of the first fixing member (231) is the highest, the height of the second fixing member (232) is the next highest, and the height of the third fixing member (233) is the lowest.

[0069] The process of generating hot water in a water treatment device (1) configured as described above is explained.

[0070] When the purified water from the first tank (100) is supplied to the second tank (200) to fill the second tank (200), the air in the internal space of the second tank (200) is gathered in the upper space of the second tank (200). In this case, since the second tank (200) is installed at an angle and the upper surface (200a) of the second tank (200) is in an inclined state, the air in the internal space of the second tank (200) is not dispersed throughout the entire upper space but is gathered in the upper space in front of the second tank (200), where an air outlet (202) is formed along the upper surface (200a).

[0071] The air gathered around the air outlet (202) is introduced into the internal space of the first tank (100) through the air vent pipe (320) and then discharged to the outside through the cover hole formed in the first tank cover (120). In this case, since the inside of the air vent pipe (320) is filled with water up to the same level as the water level of the first tank (100), as the hot water is heated by the heater (220), the water inside the air vent pipe (320) flows back into the first tank (100). However, since the amount of water flowing back is very small, the rise in the temperature of the water inside the first tank (100) can be ignored. Therefore, by installing the second tank (200) at an angle so that the air in the upper space of the second tank (200) is discharged through the air outlet (202), hot water is filled into the space where the air is located in the upper space of the second tank (200). Thus, the amount of air that remained undischarged in the upper space of the second tank (200) and the amount of expansion of that air are prevented from flowing back into the first tank (100) along the air vent pipe (320), thereby preventing the water temperature of the first tank (100) from rising.

[0072] As hot water is discharged from the second tank (200), the second tank (200) is filled with water supplied from the first tank (100). In this case, since it is filled to the same water level as the first tank (100), the inside of the air vent pipe (320) is filled with water.

[0073] Additionally, bubbles are generated during the process of heating hot water by the heater (220), and these bubbles are collected along the inclined upper surface (200a) of the second tank (200) toward the air outlet (202) and discharged through the air vent pipe (320). Therefore, backflow of hot water into the first tank (100) through the air vent pipe (320) is prevented.

[0074] Meanwhile, since the heating element (220c) of the heater (220) is spaced upward from the inlet (201), the temperature of the water near the inlet (201) does not rise excessively even when the heater (220) heats the hot water. Therefore, backflow of hot water into the first tank (100) through the inlet (201) and the supply pipe (310) is prevented.

[0075] With the above configuration, the present invention can resolve consumer complaints regarding the rise in water temperature by preventing hot water from flowing back into the first tank (100) simply by installing the second tank (200) at an angle. In addition, since there is no need to mold the second tank (200) into an angled shape, the manufacturing process of the second tank (200) is simplified, and an increase in manufacturing costs can be prevented. Furthermore, by connecting a hot water drain pipe (330) to the lowest position of the angled second tank (200), the water inside the second tank (200) can be completely drained. Additionally, by placing a heater (220) in an optimal position in the vertical direction inside the second tank (200), the backflow of hot water into the first tank (100) is prevented, and hot water can be supplied smoothly.

[0076] As described above, although the present invention has been explained in detail with reference to preferred embodiments, the present invention is not limited to the aforementioned embodiments, and it is possible to implement it with various modifications within the scope of the claims, the detailed description of the invention, and the attached drawings, and such modifications are also included in the present invention. Explanation of the symbols

[0077] 100 : 1st Tank 110 : 1st Tank Body 120 : 1st tank cover 200 : 2nd tank 200a : Top surface 200b : Bottom surface 200c : Air exhaust guide 201 : Inlet 202: Air outlet 203: Air vent connection 204: Hot water outlet connection 210: Temperature sensor 220: Heater 220a, 220b: Non-heating part 220c: Heating part 220d, 220e: Terminal pins 231: First fixing member 231a: First tank coupling part 231b: First connecting part 231c: First frame connecting part 232 : Second fixing member 232a : Second tank coupling part 232b : Second connecting part 232c : Second frame coupling part 233: Third fixing member 233a: Third tank coupling part 233b: Third connecting part 233c: Third frame coupling part 310: Supply pipe 320: Air vent pipe 330 : Hot water drain pipe 340 : Clean water outlet pipe 350 : Hot water outlet pipe 400 : Outlet section 410 : Clean water outlet 420 : Hot water outlet 500 : Fixed frame 501 : First fixed part 501a: First fastening groove 501b: First seating surface 502 : Second fixing part 502a : Second fastening groove 502b : Second seating surface 503 : Third fixing part 503a: Third fastening groove 503b: Third seating surface 510 : First fastening member 520 : Second fastening member 530 : Third fastening member

Claims

Claim 1 A water treatment device capable of preventing hot water backflow, comprising: a first tank for storing water; a second tank for storing hot water generated by heating water supplied from the first tank, wherein an air outlet is formed on the upper surface for discharging air, and the second tank is installed at an angle such that one side of the upper surface where the air outlet is formed is higher than the other side of the upper surface; a supply pipe connecting to supply water from the first tank to the second tank; and an air vent pipe having one end connected to the air outlet to discharge air inside the second tank; wherein a plurality of fixing members for installing the second tank on a fixed frame are provided on the upper surface of the second tank; and wherein the second tank is installed at an angle by making the heights at which the plurality of fixing members are coupled to the fixed frame different from each other. Claim 2 A water treatment device capable of preventing hot water backflow according to claim 1, characterized in that the second tank has a horizontal bottom surface and an inclined top surface. Claim 3 A water treatment device capable of preventing hot water backflow, characterized in that, in claim 1, the fixed frame has a plurality of seating surfaces formed thereon to which the plurality of fixed members are coupled; and the second tank is installed at an angle by forming the plurality of seating surfaces at an angle. Claim 4 A water treatment device capable of preventing hot water backflow, characterized in that, in paragraph 3, the plurality of fixing members are formed at the same height; and the plurality of seating surfaces are formed on the same plane. Claim 5 A water treatment device capable of preventing hot water backflow according to claim 3, wherein the plurality of fixing members have a higher height the closer they are to the air outlet, and the plurality of seating surfaces are formed on different planes, wherein the seating surface closer to the air outlet is formed at a higher position. Claim 6 A water treatment device capable of preventing hot water backflow according to claim 1, wherein the heating element of the heater provided inside the second tank to generate the hot water is spaced upward from the lower surface of the second tank, and is installed such that the horizontal centerline of the second tank overlaps with the upper and lower width of the heater. Claim 7 A water treatment device capable of preventing hot water backflow, characterized in that, in claim 6, the heating element is formed in the shape of a coil wound multiple times. Claim 8 A water treatment device capable of preventing hot water backflow, characterized in that, in claim 6, the vertical cross-section of the second tank is rectangular; and the heating element is wound along the longer direction in the vertical cross-section of the second tank. Claim 9 A water treatment device capable of preventing hot water backflow according to claim 6, wherein the heating element is installed spaced upward from the inlet of the second tank to which the supply pipe is connected, and the distance spaced from the bottom surface of the second tank to the bottom of the heating element is within the range of 1 / 4 to 1 / 2 of the height from the bottom surface of the second tank to the top surface. Claim 10 A water treatment device capable of preventing hot water backflow, characterized in that, in claim 1, an air discharge guide is formed on the upper surface of the second tank in which the air discharge port is formed, the guide protrudes upward at an angle toward the center of the air discharge port. Claim 11 A water treatment device capable of preventing hot water backflow according to claim 1, wherein the air outlet is located on one side of the upper surface of the second tank, and the inlet to which the supply pipe is connected is formed on the other side of the lower surface of the second tank opposite to the air outlet. Claim 12 A water treatment device capable of preventing hot water backflow according to claim 1, characterized in that the hot water drain pipe for draining the water of the second tank is connected to the other side of the lower surface of the second tank facing the air outlet. Claim 13 A water treatment device capable of preventing hot water backflow, characterized in that, in claim 1, the other end of the air vent pipe is connected to the internal space of the first tank.

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