Patent Publication Number: US-10327283-B2

Title: Home appliance

Description:
CROSS-REFERENCE TO RELATED PATENT APPLICATIONS 
     This application is a U.S. National Stage Application under 35 U.S.C. § 371 of PCT Application No. PCT/KR2015/006237, filed Jun. 19, 2015, which claims priority to Korean Patent Application No. 10-2014-0079011, filed Jun. 26, 2014, and Korean Patent Application No. 10-2015-0056461, filed Apr. 22, 2015, whose entire disclosures are hereby incorporated by reference. 
     TECHNICAL FIELD 
     The present disclosure relates to a home appliance. 
     BACKGROUND ART 
     Water purifiers among home appliances are apparatuses for purifying introduced water to supply the purified water to users. 
     A prior document, Korean Utility Application Laid-Open Publication No. 2011-000088, published on Jan. 27, 2011, discloses a water purifier. 
     The water purifier includes a space part, a storage container allowed to be located at the space part, and a heating source capable of heating water contained in the storage container. 
     According to the water purifier disclosed in the prior document, since the heating source may heat water contained in the storage container, a user may not dispense hot water through a connection tube unless the user fills the storage container with water and locates the storage container at the space part. Therefore, the user may feel inconvenience. 
     DISCLOSURE OF INVENTION 
     Technical Problem 
     Embodiments provide a home appliance in which a temperature of dispensed hot water is adjusted, and an instantaneous water heater for generating hot water is compact. 
     Embodiments also provide a home appliance in which generation of steam according to local overheating of water in a heating flow path is prevented. 
     Solution to Problem 
     According to one embodiment, a home appliance includes: a dispensing port; a heating flow path part communicated with the dispensing port; a heating device configured to heat water flowing through the heating flow path part; and a controller configured to control the heating device, wherein the heating device includes a coil part in which coils are stacked in multilayers. 
     Also, the heating device may include frame on which the coil part is seated, and the frame may be coupled to the heating flow path part. 
     Also, the frame may include spacer spacing the heating flow path part from the coil part in a predetermined distance. 
     Also, the home appliance may further include a sensor to detect a temperature of the heating flow path part, wherein the sensor may be disposed within a region defined by the coil part. 
     Also, the frame may include an opening through which one or more of an input end and an output end of the coil part pass, and the sensor may be disposed in the opening. 
     Also, the heating flow path part may include: a first guide including an inflow part and discharge part; and a second guide coupled to the first guide and defining a heating flow path through which water flows together with the first guide, and the second guide may be a magnetic substance. 
     Also, a flow path guide for guiding flow of the water may be disposed in the heating flow path so that the water uniformly flows in an entire section of the flow path. 
     Also, the home appliance may further include a sensor to detect a temperature of hot water discharged from the heating flow path and an input part for inputting a temperature of the water dispensed from the dispensing hole. The controller may include an inverter for adjusting current applied to the coil part so that the temperature inputted through the input part is the same as the temperature detected in the sensor. 
     According to another embodiment, a home appliance includes: a dispensing port; a heating flow path part communicated with the dispensing port; a heating device configured to heat water flowing through the heating flow path part; and a controller configured to control the heating device, wherein the heating flow path part includes: an inflow part to which water is introduced; a discharge part from which the heated water is discharged; and a heating flow path connecting the inflow part to the discharge part, wherein a flow path guide for guiding flow of the water is disposed in the heating flow path so that the water uniformly flows between the inflow part and the discharge part. 
     Also, the flow path guide may include a plurality of holes through which the water passes, and the plurality of holes may be arranged in a direction crossing a direction in which the water flows in the heating flow path. Also, the plurality of holes may include: a first hole defined adjacent to an end of the flow path guide; and a second hole defined adjacent to a central side of the flow path guide, the second hole has a size different from that of the first hole. 
     Also, the second hole may be defined adjacent to the discharge part when compared to the first hole. 
     Also, the flow path guide may be disposed adjacent to the discharge part when compared to the inflow part. 
     Also, the flow path guide may be defined in the heating flow path part by a forming process. 
     Also, the heating flow path part may include: a first guide; and a second guide defining the heating flow path together with the first guide, and the flow path guide may extend from the first guide toward the second guide and is spaced apart from the second guide. 
     Also, the flow path guide may be disposed on a line connecting the inflow part to the discharge part in the heating flow path so as to change a flow direction of the water introduced from the inflow part. 
     Also, the heating device may include a coil part having a ring shape, and the heating flow path part may include: a first portion facing the coil part; and a second portion not facing the coil part, and the flow path guide may guide the flow of the water so that the water introduced from the inflow part flows toward the first portion. 
     Also, the flow path guide may be disposed between the second portion and the inflow part. 
     Also, a plurality of flow path guides may be isposed to be spaced apart from each other in a direction parallel to the flow direction of the water between the inflow part and the discharge part. 
     Also, the plurality of flow path guides may include: a first flow path guide; and a second flow path guide disposed in a region between the first flow path guide and the discharge part. 
     Also, a plurality of flow path guides may be arranged in a direction crossing the flow direction of the water between the inflow part and the discharge part. 
     Also, a distance between two adjacent flow path guides may be greater than a distance between one flow path guide adjacent to a side wall of the heating flow path part and a side wall of the heating flow path part. 
     Also, the heating flow path part may include a pair of corner parts allowing the heating flow path to gradually decrease in section area as the heating flow path is away from the inflow part, and each of the pair of corner parts may be rounded or inclined, and the discharge part may be disposed between the pair of corner parts. 
     According to another embodiment, a home appliance includes: a dispensing port; a heating flow path part communicating with the dispensing port; a heating device for heating water flowing through the heating flow path part; an input part for inputting a temperature of water dispensed from the dispensing port; and a controller adjusting current applied to the coil part according to the temperature inputted through the input part. 
     Also, the home appliance may further include a discharge-water temperature sensor to detect a temperature of hot water discharged from the heating flow path part, wherein the controller may adjust the current applied to the coil part so that the temperature inputted from the input part is the same as the temperature detected from the discharge-water temperature sensor. 
     Also, the home appliance may further include an driving source operating by receiving current, wherein the controller may control current of the driving source according to the current supplied to the heating device. 
     Also, the home appliance may further include: an inflow-water temperature sensor to detect a temperature of water supplied to the heating flow path part; a flow rate sensor to detect a flow rate of the water supplied to the heating flow path part; and a discharge-water temperature sensor to detect a temperature of hot water discharged from the heating flow path part, wherein, in an initial operation stage of the heating device, the controller may determine a current value to be supplied to the coil part on the basis of information detected from the inflow-water temperature sensor and the flow rate sensor to apply the determined current value, and while the heating device operates, the controller may adjust current supplied to the coil part on the basis of the temperature detected from the discharge-water temperature sensor. 
     Also, the home appliance may further include: an inflow-water temperature sensor to detect a temperature of water supplied to the heating flow path part; and a valve for adjusting a flow rate of water supplied to the heating flow path part, wherein, in an initial operation stage of the heating device, the controller may determine a flow rate of water to be supplied to the heating flow path part on the basis of a temperature of water detected in the inflow-water temperature sensor to control the valve so that the determined flow rate of water is supplied to the heating flow path part. 
     Also, the home appliance may further include a discharge-water temperature sensor to detect a temperature of hot water discharged from the heating flow path part, wherein, in an initial operation stage of the heating device, the controller may supply a preset amount of current to the coil part and adjusts current applied to the coil part according to the temperature detected in the discharge-water temperature sensor. 
     Also, the controller may be disposed on one side of the heating device, and a shield plate for preventing the controller from being affected by a magnetic field of the coil part may be disposed between the heating device and the controller. 
     Advantageous Effects of Invention 
     According to exemplary embodiments, since the coil are stacked in multilayers, the heating device may be compact. 
     Also, since the heating device heats water flowing through the heating flow path part, standby power for storing hot water is not necessary. 
     Also, since the heating flow path part heats water flowing through the heating flow path by inductive heating, water in the heating flow path may be quickly heated without losing a heat source. 
     Also, since a surface of a magnetic substance of the heating flow path part generates heat, peripheral temperatures do not increase, and thus, the heat insulation of the heating flow path part is not necessary. 
     Also, since water may flow entirely in the cross-section of the heating flow path as the heating flow path includes a flow path guide, water may be quickly heated. 
     Also, since the water uniformly flows in the heating flow path, generation of steam from one position in the heating flow path due to local overheating may be prevented. 
     Also, since a user sets a temperature of hot water and obtains hot water having the set temperature, the home appliance may satisfy user&#39;s various preferences. 
     Also, since the controller adjusts current of the heating device and the driving source so that total amounts of current value of the home appliance does not exceed a current limit value, an abnormal operation of the home appliance and power failure phenomenon may be prevented. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a schematic view of a water purifier according to a first embodiment. 
         FIG. 2  is a perspective view of an instantaneous water heater and a controller according to the first embodiment. 
         FIG. 3  is a rear view of the instantaneous water heater of  FIG. 2 , 
         FIG. 4  is an exploded perspective view of the instantaneous water heater of  FIG. 2 . 
         FIG. 5  is a view of a flow path guide according to the first embodiment. 
         FIG. 6  is a block diagram of the water purifier according to the first embodiment. 
         FIG. 7  is a view illustrating change of current according to time in a water purifier according to the first embodiment. 
         FIG. 8  is a block diagram of a water purifier according to a second embodiment. 
         FIG. 9  is a view of an instantaneous water heater according to a third embodiment. 
         FIG. 10  is a front view of a heating flow path part according to the third embodiment. 
         FIG. 11  is a cross-sectional view taken along line A-A of  FIG. 10 . 
         FIG. 12  is a front view of a heating flow path part according to a fourth embodiment. 
         FIG. 13  is a front view of a heating flow path part according to a fifth embodiment. 
         FIG. 14  is a front view of a heating flow path part according to a sixth embodiment. 
     
    
    
     MODE FOR THE INVENTION 
     Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Regarding the reference numerals assigned to the elements in the drawings, it should be noted that the same elements will be designated by the same reference numerals, wherever possible, even though they are shown in different drawings. Also, in the description of embodiments, detailed description of well-known related structures or functions will be omitted when it is deemed that such description will cause ambiguous interpretation of the present disclosure. 
     Also, in the description of embodiments, terms such as first, second, A, B, (a), (b) or the like may be used herein when describing components of the present invention. Each of these terminologies is not used to define an essence, order or sequence of a corresponding component but used merely to distinguish the corresponding component from other component(s). It should be noted that if it is described in the specification that one component is “connected,” “coupled” or “joined” to another component, the former may be directly “connected,” “coupled,” and “joined” to the latter or “connected”, “coupled”, and “joined” to the latter via another component. 
       FIG. 1  is a schematic view illustrating a water purifier as an example of a home appliance according to a first embodiment,  FIG. 2  is a perspective view of an instantaneous water heater and a controller according to the first embodiment,  FIG. 3  is a rear view of the instantaneous water heater of  FIG. 2 ,  FIG. 4  is an exploded perspective view of the instantaneous water heater of  FIG. 2 , and  FIG. 5  is a view illustrating a flow path guide according to the first embodiment. 
     Referring to  FIGS. 1 to 5 , a water purifier  1  according to a first embodiment may include a housing  10  defining an outer appearance. 
     The housing  10  may include a plurality of panels. The housing may be manufactured by coupling the plurality of panels to each other. For example, the housing  10  may include a front panel, two side panels, a top panel, a rear panel, and a bottom panel, however, it should be noted that the present disclosure is not limited to the number of the plurality of panels. 
     Also, the housing  10  may include an input part  15  for inputting an operation command at the front panel thereof. 
     The input part  15  may include a purified water selection part for selecting dispense of purified water, a hot water selection part for selecting dispense of hot water, and a temperature selection part for selecting the temperature of the dispensed hot water. 
     The water purifier  1  may further include a manipulation lever  16  for manipulating the dispense of the purified water or hot water. 
     The water purifier  1  may further include a filtration part  20  for purifying water supplied from the outside and a purifying flow path  31  through which the water flows after passing through the filtration part  20 . The filtration part  20  may include one or more filters. 
     The purifying flow path  31  may be divided into a first flow path  32  and a second flow path  33 . 
     The second flow path  33  may be connected to a dispensing port  35  for dispensing water to the outside of the water purifier  1 . Water to be heated may flow through the first flow path  32 . 
     The water purifier  1  may further include an instantaneous water heater  50  which heats the water supplied from the first flow path  32  to change the water into hot water while the water flows and a controller  80  controlling the instantaneous water heater  50 . 
     The instantaneous water heater  50  may include a heating flow path part  60  defining a heating flow path  66  through which heated water flows and a heating device  70  for heating water flowing through the heating flow path  66 . 
     The heating device  70  may include a frame  710  and a coil part  730  seated on the frame  710 . 
     The controller  80  may be disposed adjacent to the instantaneous water heater  50 . A shield plate  90  for preventing the controller  80  from being affected by a magnetic field of the coil part  730  may be disposed between the controller  80  and the instaneous water heater  50 . 
     The frame  710  may include a ferrite seat part  712  on which ferrites  720  are seated. The ferrite seat part  712  may be defined in such a way that a portion of the frame  710  is recessed. Alternatively, the ferrite seat part  712  may be defined by a plurality of ribs formed on the frame  710 . Holes  713  may be defined in the ferrite seat part  712 . 
     An opening  711  may be defined in a central portion of the frame  710 . Also, a plurality of ferrite seat parts  712  may be disposed along a circumference of the opening  711 . 
     An overheat detection sensor  740  to detect the temperature of the heating flow path part  60  may be disposed in the opening  711 . That is, the overheat detection sensor  740  may be disposed within a region defined by a coil. The overheat detection sensor  740  may contact the heating flow path part  60  or may be spaced apart from the heating flow path part  60 . 
     The controller  80  may stop the operation of the heating device  70  when a temperature detected from the overheat detection sensor  740  exceeds a reference temperature in order to prevent the heating flow path part  60  from being heated in a state in which no water exists in the heating flow path part  60 . That is, the controller  80  may block current applied to the coil part  730 . 
     The frame  710  may include a plurality of contact ribs  714  contacting a periphery of the coil part  730  in order to prevent the position of the coil part  730  seated on the ferrite  720  from being changed. 
     The coil part  730  has a structure in which coils are wound multiple times and stacked in multilayers. When the coil constituting the coil part  730  is provided in a single layer, the frame  710  on which the coil part  730  is disposed increases in size, and thus, a total size of the heating device may increase. However, according to the present disclosure, since the coils are stacked in multilayers, region occupied by the coil part  730  may decrease. Thus, the heating device may be compact. 
     Here, each of the plurality of contact ribs  714  may have a height that is equal to or greater than the stacked height of the coil part  730 . 
     The frame  710  may further include one or more coupling ribs  715  coupled to the heating flow path part  60 . The one or more coupling ribs  715  may include a hooking part hooked to the heating flow path part  60 . Alternatively, the coupling ribs  715  may be fastened to the heating flow path part  60  by a fastening member. 
     The coil part  730  may be have a circular ring or an elliptical ring. Of course, the coil part  730  may be have a polygonal ring shape. 
     The coil part  730  may include an input end  731  and an output end  732 . At least one of the input end  731  and the output end  732  may pass through the opening  711 .  FIG. 3  illustrates, for example, that the output end  732  passes through the opening  711 . 
     The heating flow path part  60  may include a first guide  61  including an inflow part  63  for introducing water to be heated and a discharge part  64  for discharging heated water (hot water), and a second guide  62  defining a heating flow path  66  together with the first guide  61 . 
     The second guide  62  may be a magnetic substance so as to be inductively heated. 
     The first guide  61  may be a non-magnetic substance so as not to be inductively heated. Of course, both of the first and second guide  61  and  62  may be magnetic substances. 
     When current is applied to the coil part  730 , a magnetic field is generated at the coil part  730 , and current is generated by the magnetic field, and the second guide is heated. 
     The coil part  730  may be spaced a predetermined distance from the heating flow path part  62 . In order that the coil part  730  may be spaced a predetermined distance apart from the heating flow path part  62 , the frame may include a spacer  717 . The spacer  717  may contact the second guide  62  while the heating device is coupled to the heating flow path part  60 . 
     The heating flow path  60  may be disposed such that the discharge part  64  is positioned higher than the inflow part  63  in the water purifier  1 . 
     Accordingly, since water introduced into the heating flow path  66  should upwardly flow to the discharge part  64 , water flowing through the heating flow path  66  may be sufficiently heated. 
     According to the present embodiment, water flowing through the heating flow path  66  defined by the second guide  62  may be heated by the second guide  62 . Here, the entire second guide  62  may be heated, and the water in the heating flow path  66  may be quickly heated. 
     Also, there is no temperature rise adjacent to the heating flow path  60  because the surface of the second guide  62  generates heat. Therefore, there is a merit in that the insulation of the heating flow path is not required. 
     Also, since the water flowing through the heating flow path  66  is instantaneously heated, there is a merit in that standby electric power for storing and maintaining the temperature of hot water is not required. 
     Also, the discharge part  64  may be connected to the second flow path  33  through the third flow path  34 . 
     The heating flow path  66  may include a flow path guide  65  such that water may uniformly flow in the heating flow path  66 . 
     The flow path guide  65  may be disposed in a direction crossing a direction of water flow in the heating flow path  66 . Also, the flow path guide  65  may be disposed more adjacent to the discharge part  64  than the inflow part  63 . However, in the present embodiment, the position of the flow path guide  65  is not limited thereto. 
     The flow path guide  65  may include a plurality of holes  652 ,  653 , and  654  through which water passes. The plurality of holes  652 ,  653 , and  654  may be disposed in a direction crossing a direction of water flow in the heating flow path  66 . Also, the sizes of the plurality of holes  652 ,  653 , and  654  may be different. 
     The plurality of holes  652 ,  653 , and  654  may include a first hole  652  with a first size, a second hole  653  with a second size smaller than the first size, and one or more third holes  654  positioned between the first and second holes  652  and  653 . The one or more third holes  654  may have sizes equal to the size of any one of the first and second holes  652  and  653 , or have different sizes from those of the first and second holes  652  and  653 . In the present embodiment, one or more third holes may not be provided in the flow path guide. 
     The first hole  652  may be positioned adjacent to an end portion of the flow path guide  65 , and the second hole  653  may be positioned adjacent to a central portion of the flow path guide  65 . Also, the second hole  653  may be positioned more adjacent to the discharge part  64  than the first hole  652 . 
     Accordingly, since the flow resistance of the second holes  653  with a small size is greater than that of the first hole  652  in the heating flow path  66 , water is prevented from being concentrated to the second holes  653 . Thus, water may uniformly flow through the entire heating flow path  66 . 
     When water uniformly flows in the heating flow path  66 , heating time of water may be reduced since the contact time of the water and the second guide  62  is increased. 
     As another example, one or more of the first and second guides  61  and  62  may include flow path guides formed therein. In this case, the flow path guide may extend in a direction crossing the flow direction of water at a position adjacent to the discharge part  64 . 
     The first flow path  32  may include a first valve  41  for adjusting water flow. A second valve  42  for adjusting water flow may be disposed between a position to which the third flow path  34  is connected in the second flow path  33  and a position at which the third flow path  33  meets the first flow path  32 . 
     The water purifier  1  may further include an inflow-water temperature sensor  91  disposed at the first flow path  32  and detecting the temperature of water to be introduced to the heating flow path part  60 , and an discharge-water temperature sensor  92  disposed at the third flow path  34  and detecting the temperature of water discharged from the heating flow path part  60 . As another example, the inflow-water temperature sensor  91  may be disposed at an inflow part  63  of the heating flow path part  60 , and the discharge-water temperature sensor may be disposed at a discharge part  64  of the heating flow path part  60 . 
       FIG. 6  is a block diagram of a water purifier according to the first embodiment. 
     Referring to  FIG. 6 , the water purifier  1  may further include a flow rate sensor  83  detecting a flow rate of water flowing through the heating flow path part  60 , and a driving source  95  controlled by the controller  80 . 
     Although the driving source  95  is not limited thereto, the driving source  95  may include a compressor, a display part, etc., and may include all components operating by receiving current except for the instantaneous water heater in the water purifier  1 . 
     The controller  80  may include an inverter  81  adjusting current applied to the coil part  730 . 
     The inverter  81  may adjust an amount of inductive heating by changing the current applied to the coil part  730 . When the amount of inductive heating is thus adjusted, water may be heated to a temperature desired by a user, and hot water with a temperature desired by a user may be dispensed from the dispensing port  35 . 
       FIG. 7  is a view illustrating a change in current according to time in a water purifier according to the first embodiment. 
     Referring to  FIG. 7 , the controller  80  may adjust current of the entire water purifier  1 . 
     Specifically, the controller  80  may adjust the current of the driving source  95  according to whether the heating device  70  operates. The controller  80  may control the total current value A 2  of the water purifier  1  not to exceed a current limit value A 1 . 
     When the heating device  70  operates while the driving source  95  operates, the case in which the current of the water purifier  1  exceeds the current limit value A 1  may occur. In this case, the water purifier  1  abnormally operates or the power of the water purifier may be turned off. 
     Accordingly, in the present disclosure, when the heating device  70  operates, the total current value A 2  of the water purifier  1  becomes lower than the current limit value A 1  in such a way that the controller  80  adjusts the current of the driving source  95  based on the current of the heating device  70 . 
     For example, the current of the heating device  70  may be changed such that when the current of the heating device  70  is increased, the controller  80  lowers the current of the driving source  95 , and when the current of the heating device  70  is decreased, the controller  80  increases the current of the driving source  95 . 
     Hereinafter, with reference to  FIGS. 1 to 6 , the process in which purifier water and hot water are dispensed from the water purifier will be described. 
     First, the process of dispensing purified water will be described. 
     When a purified water dispense command is inputted (for example, when the purified water selection part is selected, and the manipulation lever  16  operates), the first valve  41  is turned off and the valve  42  is turned on. Then, purified water purified by the filtration part  20  is discharged through the dispensing port  35  after flowing through the purifying flow path  31  and the second flow path  33 . 
     Next, the process of dispensing hot water will be described. 
     When a hot water dispense command is inputted (for example, when the hot water selection part is selected, and the manipulation lever  16  operates), the second valve  42  may be turned off, the first valve  42  may be turned on, and the heating device  70  operates. 
     The controller  80  determines current applied to the coil part in an initial stage of the operation of the heating device  70  based on a flow rate detected from the flow rate sensor  83  and a temperature detected from the inflow-water temperature sensor  91 , and supplies the determined current to the coil part  730 . 
     Here, when water exists in the heating flow path  66 , the first valve  41  may be turned on while the heating device operates after the hot water dispense command is inputted. On the contrary, when water does not exist in the heating flow path  66 , the first valve  41  may be turned on, and when the heating flow path  66  is filled with water, the first valve may be turned off. Also, the heating of water and the discharge of heated water (hot water) may be adjusted through the adjustment of flow rate by the first valve  41 . 
     Purified water purified by the filtration part  20  is introduced to the heating flow path of the heating flow path part  60  through the inflow part  63  after flowing through the first flow path. When the heating device  70  operates, the second guide  62  is heated, and water flowing along the heating flow path  66  is heated by the second guide  62  to be changed into hot water. Further, the hot water flows to the third flow path  34  through the discharge part  64 . Then, the hot water is finally discharged through the dispensing port  35 . 
     A user may set a temperature of hot water to be dispensed by using the temperature selection part. While the heating device  70  operates, the discharge-water temperature sensor  93  detects the temperature of hot water, and the controller  80  adjusts current supplied to the coil part  730  such that the detected temperature is equal to the set temperature. 
     Thus, according to the present embodiment, since a user may set a temperature of hot water and obtain hot water with the set temperature, there is a merit of satisfying user&#39;s various preferences. 
       FIG. 8  is a block diagram of a water purifier according to a second embodiment. 
     The present embodiment is the same as the first embodiment except for being characterized in that the flow rate of water flowing to the heating device may be adjusted. Accordingly, only a characterized portion in the present embodiment will be described below. 
     Referring to  FIG. 8 , the controller  80  determines a flow rate to flow to the heating flow path part  60  in an initial stage of the operation of the heating device  70  based on a temperature detected from the inflow-water temperature sensor  91 , and controls the first valve  41  such that water with the determined flow rate is supplied to the heating flow path part  60 . 
     For example, when the temperature detected from the inflow-water temperature sensor  91  is high, the controller  80  controls the first valve  41  such that the flow rate of water flowing to the heating flow path part  60  may be greater. On the contrary, when the temperature detected from the inflow-water temperature sensor  91  is low, the controller  80  controls the first valve  41  such that the flow rate of water flowing to the heating flow path part  60  may be smaller. 
     Also, water with the determined flow rate is heated while flowing through the heating flow path part  60 . 
     A user may set a temperature of hot water to be dispensed by using the temperature selection part. 
     While the heating device  70  operates, the discharge-water temperature sensor  93  detects the temperature of hot water, and the controller  80  adjusts current supplied to the coil part  730  such that the detected temperature of the hot water is equal to the set temperature. 
     In addition, in the present disclosure, steam may be generated at the heating flow path part  60  by adjusting a flow rate of water flowing through the heating flow path part  60  and current applied to the coil part  730 . The steam generated from the heating flow path part  60  may be discharged through the dispensing port  35 , and through this process, the sterilization of flow paths from the heating flow path part  60  to the dispensing port  35  may be performed. 
     In the above two embodiments, current supplied to the coil part is determined at an initial stage of the operation of the heating device  70  based on a temperature detected from the inflow-water temperature sensor  91  and a flow rate detected from the flow rate sensor  83 . However, alternatively, the inflow-water temperature sensor and the flow rate sensor are not provided, current with a predetermined amount is supplied to the coil part at the initial stage of the operation of the heating device, and current supplied to the coil part may be adjusted based on the temperature of hot water detected from the discharge-water temperature sensor. 
     Also, in the above two embodiments, although it is described that the heating device is positioned at one side of the heating flow path part, alternatively, heating devices may be respectively disposed at both sides of the heating flow path part. 
     Also, in the above two embodiments, although it is described that the instantaneous water heater is disposed in the water purifier, alternatively, the inventive concept of the present disclosure may be applied to home appliances including water dispensing function. For example, components such as the instantaneous water heater, the filtration part, the above-mentioned flow path of water, the valve, the sensor, and the inflow part, may also be disposed the same to a refrigerator. In this case, the instantaneous water heater may be disposed, for example, at a frame of a refrigerator door or at a body including storage compartment. 
       FIG. 9  is a view of an instantaneous water heater according to a third embodiment,  FIG. 10  is a front view of a heating flow path part according to the third embodiment, and  FIG. 11  is a cross-sectional view taken along line A-A of  FIG. 10 . 
     The present embodiment is the same as the first embodiment except for the flow path guide in the heating flow path part. Thus, only portions characterized in the present embodiment will be described below, and the same portions as the first embodiment will be described by using the description of the first embodiment. 
     Referring to  FIGS. 9 to 11 , an instantaneous water heater  71  according to the present embodiment may include a heater flow path part  60 . 
     The heating flow path part  60  may include a first guide  61  including an inflow part  63  and a discharge part  64  for discharging heated water (hot water), and a second guide  62  defining a heating flow path  66  with the first guide  61 . 
     The first guide  61  may include a flow path guide  612  for guiding water flow in the heating flow path  66 . 
     The flow path guide  612  may be defined such that a portion of the first guide  61  is formed by a forming process. For example, the flow path guide  612  may be formed such that a portion of the first guide  61  protrudes toward the second guide  62 . 
     The flow path guide  612  may be function as the flow resistance of water between the inflow part  63  and the discharge part  64 . 
     That is, at least one portion of water introduced through the inflow part  63  may flow to detour around the flow path guide  612  by the flow path guide  612 . 
     The flow path guide  612  may be function to prevent the water introduced through the inflow part  63  from directly flowing to the discharge part  64 . For this, at least a portion of the flow path guide  612  may be disposed to face the inflow part  63 . Accordingly, at least one portion of the water introduced into the heating flow path  66  through the inflow part  63  have a flow direction which may be changed by the flow path guide  612 . 
     For example, at least a portion of the flow path guide  612  may be disposed on a line connecting the inflow part  63  and the discharge part  64 . 
     Here, the flow path guide  612  may extend from the first guide  61  toward the second guide  62 , and may be spaced apart from the second guide  62 . That is, the flow path guide  612  may not contact the second guide  62 . 
     According to the present embodiment, since the flow path guide  612  is spaced apart from the second guide  62 , heat loss due to the transfer of the heat generated such that the second guide  62  is heated by the current flowing through the coil part  730  may be prevented. 
     That is, according to the present embodiment, a portion of the heat generated from the second guide  62  may be transferred to the first guide  61  contacting the second guide  62 , and the other portion may be transferred to the water between the first and second guides  61  and  62 . 
     When the flow path guide  612  contacts the second guide  62 , although heat loss may be generated such that a portion of the heat of the second guide  62  is transferred not to water but directly to the flow path guide  612 , the heat loss may be prevented because the flow path guide  612  is spaced apart from the second guide according to the present embodiment. 
     Here, the distance D 2  between the flow path guide  612  and the second guide  62  may be smaller than a half of the distance D 1  between the first guide  61  and the second guide  62 . According to this structure, the heat loss due to the flow path guide  612  is prevented, and simultaneously, the flow path guide  612  may function as flow path resistance. 
     The coil part  730  may have a ring shape as described above. In this case, the coil part  730  has an opening  732  in which no coil exists. 
     Also, the coil part  730  and the heating flow path part  60  may face each other. That is, the heating flow path part  60 , that is, each of the first and second guides  61  and  62  may include a first portion  611   a  facing the coil part  730  and a second portion  611   b  not facing the coil part  730 . 
     Here, the temperature of the second portion  611   b  facing the opening  732  is lower than that of the first portion  611   a  facing the coil part  730 . Accordingly, water introduced through the inflow part  63  preferably flows along the first portion  611   a  facing the coil part  730 . 
     For this, the flow path guide  612  may be positioned between the second portion  611   b  and the inflow part  63  in the first guide  61 . Here, the inflow part  63 , the flow path guide  612 , and the second portion  611   b  may be positioned on one straight line. 
     Accordingly, while flowing upward, the water introduced through the inflow part  63  may flow to branch into both sides of the flow path guide  612  by the flow path guide  612 . 
     Of course, although water may also exist at a side of the second portion  611   b , and water flow exists, the water may flow upward affected by flow of the water flowing along the first portion  611   a.    
     According to a proposed embodiment, since the water introduced through the inflow part  63  is prevented from directly flowing to the discharge part  64  by the flow path guide  612 , there is a merit in that the water may be entirely heated in the heating flow path. 
     Also, since the water may uniformly flow in the heating flow path, the generation of steam at one position in the heating flow path due to a local overheat may be prevented. 
       FIG. 12  is a front view of a heating flow path part according to a fourth embodiment. 
     The present embodiment is the same as the third embodiment except for a flow path guide in a heating flow path part. Thus, only portions characterized in the present embodiment will be described below, and the same portions as the third embodiment will be described by using the description of the third embodiment. 
     Referring to  FIG. 12 , a first guide  61  of the present embodiment may include a plurality of flow path guides  612  and  615 . 
     The plurality of flow path guides  612  and  615  may be disposed to be spaced apart from each other in a direction parallel to a flow direction of water between the inflow part  63  and the discharge part  64 . 
     The plurality of flow path guides  612  and  615  may include a first flow path guide  612  and a second flow path guide  615  disposed between the first flow path guide  612  and the discharge part  64 . 
     Since the shape and position of the first flow path guide  612  may be the same as the flow path guide  612  described in the third embodiment, detailed descriptions will not be provided. 
     The second flow path guide  615  may guide the flow of water such that the water may entirely flow in the heating flow path  66  adjacent to the discharge part  64 . 
     At least a portion of the second flow path guide  615  may be positioned on a line connecting the first flow path guide  612  and the discharge part  64 . 
     Also, at least a portion of the second flow path guide  615  may be disposed between the discharge part  64  and the second portion  611   b.    
     Also, the first and second flow path guides  612  and  615  may face the coil part  730 . 
     According to the present embodiment, the first flow path guide  612  may guide the flow of water such that the water introduced through the inflow part  63  may flow along the first portion  611   a  facing the coil part  730 . 
     The second flow path guide  615  may prevent the water flowing to the discharge part  64  in the heating flow path  66  from being concentrated adjacent to the discharge part  64 . That is, since the water may flow to detour around the discharge part  64  in the heating flow path  66 , there is a merit in that a local overheat at both sides of the discharge part  64  may be reduced. 
     Although it is described in the above embodiment that the first guide  61  includes the first and second flow path guides  612  and  615 , alternatively, the first guide  61  may include only the second flow path guide  615 . 
       FIG. 13  is a front view of a heating flow path part according to a fifth embodiment. 
     The present embodiment is the same as the fourth embodiment except for a flow path guide in a heating flow path part. Thus, only portions characterized in the present embodiment will be described below, and the same portions as the fourth embodiment will be described by using the description of the fourth embodiment. 
     Referring to  FIG. 13 , a first guide  61  of the present embodiment may include a plurality of flow path guides  612  to  617 . 
     The plurality of flow path guides  612  to  617  may include a plurality of first flow path guides  612 ,  613 , and  614 , and a plurality of second flow path guides  615 ,  616 , and  617  disposed at a region between the first flow path guides  612 ,  613 , and  614  and the discharge part  64 . 
     The plurality of first flow path guides  612 ,  613 , and  614  may be disposed in a direction crossing the direction of water flow between the inflow part  63  and the discharge part  64 . 
     The plurality of second flow path guides  615 ,  616 , and  617  may be disposed in a direction crossing the direction of water flow between the inflow part  63  and the discharge part  64 . 
     At least a portion of the plurality of first flow path guides  612 ,  613 , and  614  may be disposed on a line connecting the inflow part  63  and the discharge part  64 . 
     Also, at least a portion of the plurality of second flow path guides  615 ,  616 , and  617  may be disposed on a line connecting the inflow part  63  and the discharge part  64 . 
     The plurality of first flow path guides  612 ,  613 , and  614  may guide the flow of water such that the water introduced through the inflow part  63  may flow to be entirely distributed in the heating flow path  66 . 
     The plurality of first flow path guides  612 ,  613 , and  614  may guide the flow of water such that the water may flow along the first portion  611   a  facing the coil part. 
     Each of the plurality of first flow path guides  612 ,  613 , and  614  may be spaced apart from a side surface portion  67  of the heating flow path part  60 . 
     The first guide  61  may include a third portion  611   c  which does not face an opening  732 , in the second portion  611   b  which does not face the coil part  730 . In the present embodiment, in order to minimize an amount of the water introduced through the inflow part  63  and flowing to the third portion  611   c , the distance between two adjacent flow path guides may be greater than the distance between one of the flow path guides  613  and  614  adjacent to a side surface portion  67  of the heating flow path part  60  and the surface portion  67  of the heating flow path part  60 . 
     The plurality of second flow path guides  615 ,  616 , and  617  may prevent the water upwardly flowing in the heating flow path  66  from being concentrated at the side of the discharge part  64 . 
     Each of the plurality of second flow path guides  615 ,  616 , and  617  may be spaced apart from a side surface portion  67  of the heating flow path part  60 . The distance between two adjacent second flow path guides may be greater than the distance between one of the flow path guides  616  and  617  adjacent to a side surface portion  67  of the heating flow path part  60  and the surface portion  67  of the heating flow path part  60 . 
       FIG. 14  is a front view of a heating flow path part according to a sixth embodiment. 
     The present embodiment is the same as the fifth embodiment except for a flow path guide in a heating flow path part. Thus, only portions characterized in the present embodiment will be described below, and the same portions as the fifth embodiment will be described by using the description of the fifth embodiment. 
     Referring to  FIG. 14 , a heating flow path part  60  of the present embodiment may further include a corner parts  61   d  and  61   e  which are rounded or inclined. 
     The corner parts  61   d  and  61   e  may include a pair of corner parts  61   d  disposed such that the area of the heating flow path  66  is gradually increased in a direction from the inflow part  63  toward the discharge part  64 . 
     The corner parts  61   d  and  61   e  may further include a pair of corner parts  61   e  disposed such that the area of the heating flow path  66  is gradually decreased in a direction from the inflow part  63  toward the discharge part  64 . 
     Here, a heating flow path between the first and second corner parts  61   d  and  61   e  in the heating flow path  66  may be constant with respect to the direction of water flow, and have a maximum width. 
     Also, the inflow part  63  may be disposed between the pair of first corner parts  61   d , and the discharge part  64  may be disposed between the pair of second corner parts  61   e.    
     According to the present embodiment, the water introduced through the inflow part  63  may be entirely distributed by the first corner part  61   d  and flow to the discharge part  64 . 
     Also, since water does not stay at the second corner part  61   e  but flows along the second corner part  61   e  toward the discharge part  64 , water may be prevented from being locally overheated at the second corner part  61   e.    
     Although it is illustrated that the heating flow path part  60  includes the first and second corner parts which are rounded or inclined, alternatively, the heating flow path part  60  includes only the second corner part which is rounded or inclined. In this case, the second corner part may be disposed such that the area of the heating flow path is gradually decreased as becoming further from the inflow part  63 .