Hot and cold water dispensers with improved safety for hot water output.

Abstract

This invention provides a hot and cold water dispenser with improved safety of the hot water output function. [Solution] This invention relates to a chiller / heater with improved safety of the hot water discharge function, which prevents water from the hot water tank from being discharged into the air vent line during the hot water discharge process by installing an on / off valve on the air vent line connected to the hot water tank and closing the on / off valve during the hot water discharge process, thereby guiding the water to flow through the hot water discharge line and enabling the hot water discharge process to be carried out smoothly and stably.

Description

【Technical Field】 【0001】 The present invention relates to a cold and hot water dispenser with improved safety of the hot water outlet function. More specifically, it relates to a cold and hot water dispenser with improved safety of the hot water outlet function that can prevent the water in the hot water tank from being discharged into the air vent line during the hot water outlet process and guide it to flow through the hot water outlet line, so that the hot water outlet process can be smoothly and stably performed. 【Background Art】 【0002】 Recently, due to the rapid industrial development, environmental pollution has become serious. Among them, water pollution has reached a serious level, and in most places such as homes and government offices, drinking water is consumed through cold and hot water dispensers or water purifiers. 【0003】 A cold and hot water dispenser is generally configured to be able to discharge the water stored in the raw water bucket for drinking, and a device for heating or cooling the water is separately provided inside the cold and hot water dispenser. 【0004】 Such a cold and hot water dispenser generally includes a case body into which a raw water bucket can be inserted on the upper surface, a cold water tank disposed inside the case body for cooling the water flowing in from the raw water bucket, a hot water tank connected to the cold water tank for heating the water flowing in from the cold water tank, and a water outlet cock capable of discharging cold or hot water. 【0005】 When the user performs a water outlet operation for cold or hot water, water is supplied from the cold water tank or the hot water tank through the water outlet line, and cold or hot water is discharged through the water outlet cock. 【0006】 Since the raw water bucket of the cold and hot water dispenser is generally fixed in an externally exposed state on the upper surface of the case body, problems such as contamination of the raw water bucket and deterioration inside the raw water bucket may occur, and there are also problems such as a decrease in aesthetic sense in terms of the interior of the indoor space. 【0007】 To address these issues, a separate cover has been developed and is used to surround the outside of the water tank. However, this is not an integrated product with the water heater, and it does not connect properly to the water heater, causing inconvenience in use and contributing little to improving the aesthetics of the room. 【0008】 Furthermore, while various shapes and structures of chillers and hot water dispensers have been developed recently to solve these problems, the level of development is still very low, as changes in shape or structure can cause problems with the chilled or hot water output function. [Prior art documents] [Patent Documents] 【0009】 [Patent Document 1] Registered Patent No. 10-1488906 of the Republic of Korea [Overview of the Initiative] [Problems that the invention aims to solve] 【0010】 This invention was made to solve the problems of the prior art, and the objective of this invention is to provide a chiller / heater that can smoothly and stably carry out the hot water discharge process by installing an on / off valve on an air vent line connected to a hot water tank and closing the on / off valve during the hot water discharge process, thereby preventing the water from being discharged from the hot water tank into the air vent line and guiding it to flow through the hot water discharge line. [Means for solving the problem] 【0011】 The present invention provides a water chiller / heater comprising: a chilled water tank disposed inside the case body of the water chiller / heater for cooling and storing the water that flows in; a hot water tank disposed inside the case body for heating and storing the water that flows in; an air vent line, one end of which is connected to an air vent formed in the hot water tank and the other end of which is connected to the chilled water tank; an on / off valve mounted on the air vent line and operated to open and close; and a control unit that controls the operating state of the on / off valve. 【0012】 At this time, the control unit can control the operation so that the on / off valve closes while the hot water is being discharged from the hot water tank in accordance with the input water discharge command. 【0013】 Furthermore, the top surface of the case body is formed to allow a water bucket to be inserted, and water can flow into the cold water tank from the water bucket. 【0014】 Furthermore, the hot water tank is connected to the cold water tank via a connecting line, allowing water to flow in from the cold water tank. 【0015】 Furthermore, the chiller / heater further includes a guide pipe positioned to protrude upward from the case body, with a water outlet caulk formed at its upper end. The upper end of the guide pipe is positioned higher than the raw water bucket, and the water outlet caulk can be formed at the upper end of the guide pipe and positioned higher than the raw water bucket. 【0016】 Furthermore, the chiller and hot water system further includes a chilled water supply pump and a hot water supply pump that operate to supply chilled water and hot water, respectively, from the chilled water tank and the hot water tank to the outlet coke, and the control unit can operate the chilled water supply pump or the hot water supply pump to dispense chilled water or hot water in response to an outlet operation signal generated by the user, and can operate the on / off valve to close while the hot water supply pump is operating. 【0017】 Furthermore, the control unit can control the operation of the hot water supply pump to activate when the water outlet operation signal is a hot water outlet signal, and can control the operation so that the on / off valve closes simultaneously with the start of operation of the hot water supply pump, or closes approximately a predetermined lead time before the start of operation of the hot water supply pump. 【0018】 Furthermore, the control unit can control the operation so that the on / off valve opens simultaneously with the completion of the operation of the hot water supply pump or after a preset delay period. 【0019】 Furthermore, the control unit can be controlled to operate so that the on / off valve is always open during times other than the operating time of the hot water supply pump. 【0020】 Furthermore, the hot water supply pump is mounted on a connecting line that connects the chilled water tank and the hot water tank, and water is supplied from the chilled water tank to the hot water tank through the hot water supply pump, and the water from the hot water tank can be supplied to the outlet coke through the outlet line by the pumping pressure from the hot water supply pump. 【0021】 Furthermore, the chilled water supply pump is mounted on the outlet line connected to the chilled water tank, and the water from the chilled water tank can be supplied to the outlet coke through the outlet line by the pumping pressure from the chilled water supply pump. [Effects of the Invention] 【0022】 According to the present invention, by installing an on / off valve on an air vent line connected to a hot water tank and closing the on / off valve during the hot water discharge process, it is possible to prevent the water from the hot water tank from being discharged into the air vent line during the hot water discharge process and instead guide it to flow through the hot water discharge line, thereby enabling the hot water discharge process to be carried out smoothly and stably. 【0023】 Also, by setting the closing time of the on-off valve to be the same as or earlier than the start time of the operation of the hot water supply pump, and setting the opening time of the on-off valve to be the same as or later than the completion time of the operation of the hot water supply pump, there is an effect that stable hot water discharge can be performed during the entire time from the start to the completion of the hot water discharge process. 【Brief Description of the Drawings】 【0024】 [Figure 1] It is a perspective view schematically showing the outer shape of a cold and hot water dispenser according to an embodiment of the present invention. [Figure 2] It is a cross-sectional view schematically showing the internal structure of a cold and hot water dispenser according to an embodiment of the present invention. [Figure 3] It is a drawing conceptually showing the overall flow path structure of a cold and hot water dispenser according to an embodiment of the present invention. [Figure 4] It is a block diagram schematically showing the control-related configuration of a cold and hot water dispenser according to an embodiment of the present invention. [Figure 5] It is a flowchart stepwise showing the hot water discharge operation control flow of a cold and hot water dispenser according to an embodiment of the present invention. [Figure 6] It is a drawing conceptually showing the overall flow path structure of a cold and hot water dispenser according to another embodiment of the present invention. 【Modes for Carrying Out the Invention】 【0025】 Hereinafter, specific embodiments for embodying the present invention will be described in detail with reference to the drawings. 【0026】 First, when adding reference numerals to the components in each drawing, it should be noted that the same components are given as identical reference numerals as much as possible even if they are shown on other drawings. Further, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted. 【0027】 Furthermore, when it is mentioned that one component is 'connected', 'supported', 'linked', 'supplied', 'transmitted', or 'contacted' by another component, it should be understood that this may mean that it is directly connected, supported, linked, supplied, transmitted, or contacted by other components, but that other components may also be present in between. 【0028】 The terms used herein are used solely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless clearly intended to be otherwise in the context. 【0029】 Furthermore, the terms "top," "bottom," and "side" used herein are explained based on what is shown in the drawings, and it should be made clear in advance that they may be expressed differently if the orientation of the object changes. For similar reasons, some components are exaggerated, omitted, or shown schematically in the attached drawings, and the size of each component does not fully reflect its actual size. 【0030】 Furthermore, while terms including ordinal numbers, such as "first," "second," etc., can be used to describe a variety of components, the components themselves are not limited by such terms. These terms are used solely for the purpose of distinguishing one component from another. 【0031】 As used in this specification, the term "includes" does not mean to embody a specific characteristic, area, constant, stage, operation, element and / or component, nor does it mean to exclude the existence or addition of other specific characteristics, areas, constants, stages, operations, elements, components and / or groups. 【0032】 Figure 1 is a schematic perspective view showing the external shape of a chiller / heater according to one embodiment of the present invention, Figure 2 is a schematic cross-sectional view showing the internal structure of a chiller / heater according to one embodiment of the present invention, and Figure 3 is a conceptual drawing showing the overall flow path structure of a chiller / heater according to one embodiment of the present invention. 【0033】 A chiller / heater according to one embodiment of the present invention has a configuration that is excellent in terms of ease of use and aesthetic design, with the outlet water cooler positioned higher than the raw water bucket, and comprises a case body 100, a chilled water tank 210, a hot water tank 220, a guide pipe 120, an outlet line 300, a chilled water supply pump 211, a hot water supply pump 221, an air vent line 500, an on / off valve 510, and a control unit 600. 【0034】 The case body 100 is a case-shaped structure with an internal storage space, and is formed so that a water bucket 10 can be inserted and secured to its top surface. A water bucket connection port (not shown) is formed on the top surface of the case body 100 so that the water bucket 10 can be inserted and secured to it, and when the water bucket 10 is secured to the water bucket connection port, water is supplied from the water bucket 10 to the bottom through the water bucket connection port. 【0035】 A cover 110, formed to surround the outside of the water bucket 10, can be detachably attached to the top surface of the case body 100. The cover 110 can be attached to the top surface of the case body 100 using various attachment structures, such as a left-right sliding method or an up-and-down insertion method. Such a cover 110 can function as part of the case body 100's structure while attached to it. 【0036】 The chilled water tank 210 is positioned in the internal space of the case body 100 so that water flows in from the raw water bucket 10 inserted into the case body 100. The chilled water tank 210 is equipped with a separate cooling device (not shown) to cool the water stored inside the chilled water tank 210. 【0037】 The hot water tank 220 is located below the chilled water tank 210 and is connected to the chilled water tank 210 via a connecting line 230 so that water stored in the chilled water tank 210 flows into it. The hot water tank 220 is equipped with a separate heating device (not shown) to heat the water stored inside the hot water tank 220. An air vent 222 can be formed on the top surface of the hot water tank 220 to release internal pressure. 【0038】 A hollow pipe-shaped guide pipe 120 is positioned to protrude upward from one end of the upper surface of the case body 100. A water outlet 130 is attached to the upper end of the guide pipe 120 to allow for the discharge of cold or hot water. An operating section 140, which can be operated by the user, is formed on one side of the guide pipe 120. The operating section 140 may be equipped with buttons or the like that allow for the discharge of cold or hot water. 【0039】 At this time, the guide pipe 120 is formed so that its upper end is located at a position higher than the upper surface height of the raw water bucket 10, and the water outlet caulk 130 is formed at the upper end of the guide pipe 120, so the water outlet caulk 130 is located higher than the upper surface of the raw water bucket 10. A cover 110 is placed outside the raw water bucket 10, and the cover 110 functions as part of the case body 100, so a water receiving portion 111 can be formed on the upper surface of the cover 110, located vertically below the water outlet caulk 130. 【0040】 Thus, the water outlet caulk 130 is located at the top of the raw water bucket 10 and is positioned relatively higher than the water outlet caulk of a typical chiller / hot water dispenser. This allows the user to perform the water dispensing process without bending down when dispensing cold or hot water, improving user convenience. Additionally, a water receiving section 111 is formed on the upper surface of the cover 110, allowing the cover 110 to function as part of the case body 100. At the same time, the higher position of the water outlet caulk 130 enhances the overall aesthetic appearance. 【0041】 An outlet line 300 is connected to the outlet cork 130 to enable the discharge of cold or hot water. The lower end of the outlet line 300 is connected to the cold water tank 210 and the hot water tank 220, respectively, and the upper end is connected to the outlet cork 130. For example, the outlet line 300 may include a cold water outlet line 310 with one end connected to the cold water tank 210 and a hot water outlet line 320 with one end connected to the hot water tank 220, as shown in Figures 2 and 3. The cold water outlet line 310 and the hot water outlet line 320 can be combined into one before entering the guide pipe 120, so that a single outlet line 300 is connected to the outlet cork 130 along the guide pipe 120. 【0042】 A chilled water valve 311 and a hot water valve 321 can be installed in the chilled water outlet line 310 and the hot water outlet line 320, respectively. The chilled water valve 311 and the hot water valve 321 can be solenoid valves, which are kept in a closed state at all times and controlled to open only during the chilled water or hot water outlet process. 【0043】 A chilled water supply pump 211, which operates to supply chilled water from the chilled water tank 210 through the outlet line 300, and a hot water supply pump 221, which operates to supply hot water from the hot water tank 220 through the outlet line 300, are located inside the case body 100. 【0044】 The chilled water supply pump 211 is mounted on the chilled water outlet line 310 of the outlet line 300, and the pumping pressure from the chilled water supply pump 211 supplies water from the chilled water tank 210 to the outlet cork 130 through the outlet line 300. The hot water supply pump 221 can be mounted on the connecting line 230 that connects the chilled water tank 210 and the hot water tank 220. Water is supplied from the chilled water tank 210 to the hot water tank 220 through the hot water supply pump 221, and the pumping pressure from the hot water supply pump 221 supplies water from the hot water tank 220 to the outlet cork 130 through the outlet line 300. 【0045】 In one embodiment of the present invention, since the outlet coke 130 is located higher than the raw water bucket, unlike a typical chiller / heater, water cannot be dispensed from the chilled water tank 210 and the hot water tank 220 due to the difference in potential energy. Therefore, in one embodiment of the present invention, the system is configured to supply water from the chilled water tank 210 and the hot water tank 220 to the outlet coke 130 using the pumping pressure of the chilled water supply pump 211 and the hot water supply pump 221. 【0046】 An air vent 222 is formed on the top surface of the hot water tank 220 to release pressure from inside the hot water tank 220. In the hot water tank 220, the water is heated and the internal pressure increases, which can cause the water to boil and overflow, so a separate air vent line 500 is connected to the air vent 222 to prevent this. 【0047】 One end of the air vent line 500 is connected to the air vent 222 and the other end is connected to the chilled water tank 210. Therefore, steam from the hot water tank 220 flows into the chilled water tank 210 along the air vent line 500, as shown by the dashed arrow in Figure 3, and the hot water tank 220 maintains a stable pressure state at all times. 【0048】 In one embodiment of the present invention, an on / off valve 510 can be mounted on the air vent line 500. The on / off valve 510 can be controlled by a control unit 600 to remain open at all times and close only when hot water is being dispensed. Such an on / off valve 510 can be a NOS (Normal Open Solenoid) valve that is normally open and closes upon receiving an electrical signal. 【0049】 In other words, when a hot water discharge signal is generated, the control unit 600 can control the operation of the hot water supply pump 221 to activate and at the same time control the operation of the on / off valve 510 to close. 【0050】 As described above, the hot water supply pump 221 is mounted on the connecting line 230 that connects the chilled water tank 210 and the hot water tank 220. Water is supplied from the chilled water tank 210 to the hot water tank 220 through the hot water supply pump 221, and the water from the hot water tank 220 is supplied to the outlet coke 130 through the outlet line 300 by the pumping pressure from the hot water supply pump 221. 【0051】 If the air vent line 500 is open during this hot water discharge process, the water from the hot water tank 220 can flow into the air vent line 500 and flow along the air vent line 500 into the chilled water tank 210, rather than being supplied through the hot water discharge line 320. In particular, because the position of the discharge coke 130 is higher than the position of the chilled water tank 210, the phenomenon of hot water discharge through the air vent line 500 during the hot water discharge process can be deepened. 【0052】 Therefore, in one embodiment of the present invention, an on / off valve 510 is installed in the air vent line 500, and the on / off valve 510 is closed when the hot water supply pump 221 is operating, thereby preventing water from the hot water tank 220 from being discharged into the air vent line 500 and allowing water to be discharged smoothly and safely through the hot water outlet line 320. 【0053】 Looking at the overall water discharge process of the chiller / heater configured in this way in detail with reference to Figure 5, first, the on / off valve 510 is kept in the open state (S10). If a water discharge operation signal is generated in this state (S20), the control unit 600 controls the operation of the chilled water supply pump 211 or the hot water supply pump 221 so that chilled water or hot water is discharged according to the water discharge operation signal. If the water discharge operation signal is a hot water discharge signal (S30), the control unit controls the operation of the hot water supply pump 221 to operate, and controls the operation of the on / off valve 510 to close while the hot water supply pump 221 is operating (S40). If the water discharge operation signal is a chilled water discharge signal, the on / off valve 510 is not closed and is kept in the open state. 【0054】 At this time, the control unit 600 can control the operation so that the on / off valve 510 closes simultaneously with the start of operation of the hot water supply pump 221, or so that the on / off valve 510 closes approximately a preset lead time before the start of operation of the hot water supply pump 221. The lead time can be set in various ways according to the user's needs, for example, to 0.5 seconds or 1 second. 【0055】 Furthermore, the control unit 600 can control the operation so that the on / off valve 510 opens simultaneously with the completion of the operation of the hot water supply pump 221 or after a preset delay time. The delay time can be set in various ways according to the user's needs, for example, to 0.5 seconds or 1 second. 【0056】 In other words, the on / off valve 510 can be controlled to close before or at the same time as the hot water supply pump 221 starts operating, and to open after or at the same time as the hot water supply pump 221 finishes operating. 【0057】 In this way, by closing the on / off valve 510 for a period equal to or slightly longer than the operating time of the hot water supply pump 221, hot water can be dispensed more smoothly and stably throughout the entire time from the start of operation to the completion of operation of the hot water supply pump 221. 【0058】 Figure 6 is a conceptual diagram showing the overall flow path structure of a chiller / heater according to another embodiment of the present invention. 【0059】 In one embodiment of the present invention, as described above, the outlet coke 130 is located at the top of the case body 100 so that it is higher than the raw water bucket, so the length of the outlet line 300 connecting the cold water tank 210 and hot water tank 220 located inside the case body 100 to the outlet coke 130 is formed to be relatively long. 【0060】 Once the process of discharging cold or hot water through the outlet coke 130 is complete, the discharging is interrupted, and any cold or hot water that could not be discharged remains inside the outlet line 300. The remaining water on the outlet line 300 mainly remains in the section from the outlet coke 130 fulcrum to the cold water valve 311 and the hot water valve 321. 【0061】 In this manner, if a certain period of time elapses with cold or hot water remaining inside the outlet line 300, the cold or hot water will exchange heat with the outside at room temperature, causing the cold water to lose its coldness and the hot water to lose its heat. In other words, the water remaining inside the outlet line 300 will change to a room temperature state after a certain period of time. If the user operates the control unit 140 in this state to start a new water dispensing process, the water remaining inside the outlet line 300 will be discharged first through the outlet coke 130, and cold or hot water will be dispensed only after all the remaining water in the outlet line 300 has been discharged. In other words, since the remaining water in the outlet line 300 is discharged at the beginning of the water dispensing process, the user will not be able to dispense cold or hot water at a normal temperature. 【0062】 In another embodiment of the present invention, a recovery line 400 and a flow path switching valve 410 are installed to prevent residual water from being discharged from the discharge line 300 during such an initial discharge process. 【0063】 One end of the recovery line 400 is connected to a pivot point adjacent to the outlet cork 130 within the entire section of the outlet line 300, and the other end is connected to the chilled water tank 210. At this time, the recovery line 400 can be connected to the air vent line 500 via a foot member and connected to the chilled water tank 210 in a single line. Of course, each can also be connected to the chilled water tank 210 via separate lines. 【0064】 The flow path switching valve 410 is installed at the connection point between the recovery line 400 and the outlet line 300 and operates to switch the flow path of water supplied through the outlet line 300 to either the recovery line 400 or the outlet coke 130. The flow path switching valve 410 is operated under the control of the control unit 600. 【0065】 In the process of discharging chilled or hot water through such a recovery line 400 and flow path switching valve 410, the residual water in the discharge line 300 is initially recovered into the chilled water tank 210 through the recovery line 400, and the system can be controlled to ensure that chilled or hot water is discharged normally after the residual water has been recovered. 【0066】 In other words, when a user issues a water dispensing operation signal, the control unit 600 can control the operation of the flow path switching valve 410 so that cold or hot water is dispensed after the water stored on the water dispensing line 300 has been recovered through the recovery line 400. The residual water recovery path in the initial water dispensing line 300 is shown by a dotted line in Figure 6. 【0067】 To look at it in more detail, the control unit 600 can control the operation of the flow path switching valve 410 so that either the first water discharge mode or the second water discharge mode is executed when a water discharge operation signal is generated. 【0068】 The first discharge mode is a mode in which cold or hot water is discharged after the residual water in the recovery line 400 has been recovered, and the second discharge mode is a mode in which cold or hot water is discharged immediately without the residual water recovery process in the recovery line 400. 【0069】 In the first discharge mode, the control unit 600 can control the operation so that the selected path of the flow channel switching valve 410 is directed towards the recovery line 400 during a preset recovery time, and after the recovery time, it can control the operation so that the selected path of the flow channel switching valve 410 is directed towards the discharge coke 130. The recovery time can be set in various ways according to the user's needs. For example, it can be set to 1 second, 2 seconds, etc. 【0070】 In this way, the control unit 600 performs the first water discharge mode, which prevents residual water in the water discharge line 300 from being discharged at the beginning of the cold water or hot water discharge process, and ensures that cold water or hot water at the correct temperature is always dispensed accurately. 【0071】 The control unit 600 can also control the operation of the flow path switching valve 410 so that the first water discharge mode is performed each time a water discharge operation signal is generated. However, in the first water discharge mode, the water discharge process is delayed during the residual water recovery time. Therefore, the second water discharge mode can be performed depending on the conditions for generating the water discharge operation signal, thereby enabling a faster water discharge process. 【0072】 To this end, the control unit 600 can determine whether the water discharge operation signal corresponds to a preset recovery condition, and if the water discharge operation signal corresponds to the recovery condition, it can control the operation of the flow path switching valve 410 so that the first water discharge mode is performed, and if the water discharge operation signal does not correspond to the recovery condition, it can control the operation of the flow path switching valve 410 so that the second water discharge mode is performed in which cold water or hot water is discharged together with the water stored on the water discharge line 300. 【0073】 In this case, the recovery conditions may include a first condition and a second condition. The first condition is whether the time interval between the current water outlet operation signal and the previous water outlet operation signal is equal to or greater than a reference time, and the second condition is whether the type of chilled / hot water selected in the current water outlet operation signal is different from the type of chilled / hot water selected in the previous water outlet operation signal. In this case, the reference time can be set in various ways according to the user's needs, for example, 3 minutes, 5 minutes, etc. 【0074】 Looking at the water discharge process in detail with the above configuration, first, when a water discharge operation signal is generated, it is determined whether the water discharge operation signal meets the first condition. If the first condition is met, that is, if the time difference between the time when the previous water discharge process occurred and the time when the current water discharge operation signal was generated exceeds the standard time (for example, 5 minutes), the first water discharge mode, which recovers residual water, is performed. If the first condition is not met, that is, if the time difference between the time when the previous water discharge process occurred and the time when the current water discharge operation signal was generated is within the standard time, it is determined whether the second condition is met. If the second condition is met, that is, if the previous water discharge operation signal was for cold water discharge and the current water discharge operation signal is for hot water discharge, and the types of water discharged are different, the first water discharge mode, which recovers residual water, is performed. If the second condition is not met, that is, if the previous water discharge operation signal was for cold water discharge and the current water discharge operation signal is also for cold water discharge, and the types of water discharged are the same, then the second water discharge mode is performed, in which cold or hot water is discharged along with the remaining water without recovering the remaining water. 【0075】 To summarize, if the water discharge process is repeated in a short period of time, the residual water temperature in the discharge line 300 will not change to room temperature and will remain in a cold or warm state. In this case, cold or warm water can be discharged without recovering the residual water. However, even if the water discharge process is repeated in a short period of time, if the type of water discharged previously and the type of water discharged now are different, such as cold water and warm water, then, for example, if the residual water in the discharge line 300 is cold water that was previously discharged and the water being discharged now is warm water, then the residual water can be recovered and then warm water can be discharged. 【0076】 This control method ensures that chilled and hot water at the precise temperature is always available, and in some situations, chilled or hot water can be dispensed quickly without recovering any residual water, even in this case, ensuring that chilled and hot water at the precise temperature is available. 【0077】 The above description is merely illustrative of the technical concept of the present invention, and a person with ordinary skill in the art to which the present invention belongs will be able to make various modifications and variations without deviating from the essential characteristics of the present invention. Therefore, the embodiments disclosed herein are for illustrative purposes only, not to limit the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by such embodiments. The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical concepts within an equivalent scope should be interpreted as being included in the scope of rights of the present invention. [Explanation of symbols] 【0078】 100 Case Body 110 cover 120 Guide Pipe 130 Izumi Coke 140 Operation section 210 Cold water tank 211 Chilled water supply pump 220 Hot water tank 221 Hot water supply pump 222 Air Vent 230 Connecting Line 300 Outflow Line 310 Cold water outlet line 311 Cold water valve 320 Hot water outlet line 321 Hot water valve 400 collection line 410 Flow path switching valve 500 Air Vent Lines 510 Shut-off valve 600 Control Unit

Claims

[Claim 1] A chilled water tank is located inside the main body of the chiller / heater to cool and store the incoming water, A hot water tank is placed inside the case body to heat and store the water that flows in, An air vent line having one end connected to an air vent formed in the hot water tank and the other end connected to the cold water tank, An on / off valve mounted on the aforementioned air vent line and operated to open and close, A control unit that controls the operating state of the on / off valve, Includes, The control unit controls the operation so that the on / off valve closes while hot water is being dispensed from the hot water tank in accordance with the input water dispensing command. Hot and cold water dispenser. [Claim 2] The upper surface of the case body is formed to allow a water bucket to be inserted, The chiller / heater according to claim 1, wherein water flows into the chilled water tank from the raw water bucket. [Claim 3] The hot water tank is connected to the cold water tank via a connecting line, and water flows into it from the cold water tank, as described in claim 2. [Claim 4] The aforementioned water heater / chiller is The case further includes a guide pipe positioned to protrude upward from the case body, with a water outlet caulk formed at its upper end. The guide pipe is formed such that the position of its upper end is higher than the position of the water bucket. The water outlet caulk is formed at the upper end of the guide pipe and positioned higher than the raw water bucket, as described in claim 2. [Claim 5] The aforementioned water heater / chiller is The system further includes a chilled water supply pump and a hot water supply pump that operate to supply chilled water and hot water, respectively, from the chilled water tank and the hot water tank to the outlet coke. The control unit controls the operation of the chilled water supply pump or the hot water supply pump so that chilled water or hot water is dispensed in response to a water dispensing operation signal generated by the user. The chiller / heater according to claim 4, wherein the operation is controlled so that the on / off valve closes while the hot water supply pump is operating. [Claim 6] The control unit controls the operation of the hot water supply pump to operate when the water outlet operation signal is a hot water outlet signal, and controls the operation of the on / off valve to close at the same time as the start of operation of the hot water supply pump, or to close the on / off valve approximately a predetermined lead time before the start of operation of the hot water supply pump, according to claim 5. [Claim 7] The chiller / heater according to claim 5, wherein the control unit controls the operation so that the on / off valve opens simultaneously with the completion of the operation of the hot water supply pump, or after a predetermined delay period. [Claim 8] The control unit, The chiller / heater according to claim 5, wherein the operation is controlled so that the on / off valve is always open during times other than the operating time of the hot water supply pump. [Claim 9] The hot water supply pump is mounted on the connecting line that connects the cold water tank and the hot water tank. The chiller / heater according to claim 5, wherein water is supplied from the chilled water tank to the hot water tank through the hot water supply pump, and the water from the hot water tank is supplied to the outlet coke through the outlet line by the pumping pressure from the hot water supply pump. [Claim 10] The chilled water supply pump is mounted on the outlet line connected to the chilled water tank. The chiller / heater according to claim 5, wherein the water in the chilled water tank is supplied to the outlet coke through the outlet line by the pumping pressure of the chilled water supply pump.

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