Heat exchanger and water heating device having the same

Abstract

The invention relates to a heat exchanger and a water heating device having the same. A heat exchanger according to an embodiment of the present invention comprises: a heating member that includes a heating pattern of a predetermined shape and generates heat; and a main body part in which, when water flowing in through the inlet part flows to the outlet part along the flow path, heat exchange occurs due to heat generated by the heating member, thereby generating and discharging hot water, in which the heating pattern is divided into a plurality of sections formed to have different widths from each other.

Description

Technical Field

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the priority of Korean Patent Application No. 10-2022-0101486 and Korean Patent Application No. 10-2023-0085303 filed on August 12, 2022 and June 30, 2023, respectively, in the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. Technical Field

[0004] The present disclosure relates to a heat exchanger and a water heating device having the same, and more particularly to a technology for preventing scale generation in a heat exchanger by adjusting a heating pattern of a heating member that provides heat for heating water containing calcium ions. Background Art

[0005] Typically, water containing minerals such as calcium and magnesium ions is directly heated using equipment using electric boilers and water heaters.

[0006] Therefore, when water containing minerals is directly heated and used in electric boilers and water heaters, calcium ions contained in the water may be deposited as calcium carbonate to generate scale fixed inside the flow path.

[0007] In this way, when scale is generated inside the flow path, the flow of water flowing along the flow path may be blocked, and thus, heat exchange performance may be reduced, and the heating element may be deteriorated, and thus, the life of the device may be shortened.

[0008] Generally, in order to suppress the generation of scale, the generation of scale is suppressed by removing calcium ions that cause the generation of scale using an ionization filter or the like to reduce the concentration of calcium ions.

[0009] However, since additional facilities such as an ionization filter must be separately provided and a space for installing the additional facilities must be secured, costs are increased. Summary of the invention

[0010] Technical issues

[0011] One aspect of the present disclosure provides a heat exchanger and a water heating device having the same, which can prevent scale from being generated in a flow path of the heat exchanger by reducing power density of a heating pattern to suppress a continuous increase in the surface temperature of water.

[0012] One aspect of the present disclosure also provides a heat exchanger and a water heating device having the heat exchanger, which gradually reduce the power density by subdividing the heating pattern so that the width of the heating pattern gradually increases to form the width of the heating pattern in each divided section.

[0013] One aspect of the present disclosure also provides a heat exchanger and a water heating device having the same, which can prevent cost increase due to additional facilities by adjusting the width of a heating pattern to suppress a continuous increase in the surface temperature of water in a flow path.

[0014] The technical problems to be solved by the present disclosure are not limited to the above-mentioned problems, and any other technical problems not mentioned herein will be clearly understood by those skilled in the art to which the present disclosure belongs from the following description.

[0015] Technical Solution

[0016] According to one aspect of the present disclosure, a heat exchanger includes: a heating member including a heating pattern of a predetermined shape for generating heat; and a main body for exchanging heat generated by the heating member while water introduced through a water inlet flows along a flow path to a water outlet to generate and discharge hot water, and the heating pattern is divided into a plurality of sections, and the heating pattern is formed so that the width of the heating pattern is different for the divided sections.

[0017] According to an embodiment, the heating pattern may be formed along a flow direction of water flowing along the flow path.

[0018] According to an embodiment, the heating pattern may be formed in a zigzag shape.

[0019] According to an embodiment, the main body may include: an upper panel in which a water inlet and a water outlet are formed; a lower panel coupled to the upper panel at a lower portion of the upper panel; and a flow path panel in which a flow path is formed, and the flow path panel is formed to be adhered between the upper panel and the lower panel when the upper panel and the lower panel are coupled to each other, and the flow path panel may be formed so that ends of the flow path are connected to the water inlet and the water outlet.

[0020] According to one embodiment, the heating member may be formed to be adhered to an upper portion of the upper panel and between the water inlet and the water outlet.

[0021] According to an embodiment, the heating patterns may be formed such that widths of the heating patterns gradually increase as they go from a water inlet connected to the flow path to a water outlet.

[0022] According to one embodiment, the heating pattern may be formed such that the width of the heating pattern gradually becomes larger for separate portions, and the width of the heating pattern is the same in the same portion.

[0023] According to one embodiment, the heating patterns may be formed such that the power densities thereof decrease as they go from the water inlet connected to the flow path of the heat exchanger to the water outlet for separating the sections.

[0024] According to an embodiment, the heating pattern may include a plurality of resistors, and the plurality of resistors are connected in a series structure.

[0025] According to an embodiment, the heating pattern may include a plurality of resistors, and the plurality of resistors are connected in a parallel structure.

[0026] According to an embodiment, the heating pattern may include a plurality of resistors, and the plurality of resistors are connected in a combination structure of a series connection and a parallel connection structure.

[0027] According to an embodiment, the heating pattern may include a plurality of resistors, and the plurality of resistors are connected in a combination structure of a parallel structure.

[0028] According to an embodiment, the heating member may further include insulating pads formed to be attached to upper and lower portions of the heating pattern.

[0029] According to another aspect of the present disclosure, a water heating device including a heat exchanger is provided.

[0030] Beneficial Effects

[0031] According to an embodiment of the present disclosure, by reducing the power density of the heating pattern to suppress the surface temperature of water from continuously rising, it is possible to prevent scale from being generated in a flow path of a heat exchanger.

[0032] Furthermore, according to an embodiment of the present disclosure, the power density may be gradually reduced by dividing the heating pattern and forming the width of the heating pattern of each divided section so that the width gradually increases.

[0033] Furthermore, according to the embodiments of the present disclosure, it is possible to prevent an increase in cost due to additional facilities by adjusting the width of the heating pattern to suppress a continuous rise in the surface temperature of water in the flow path. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1a and Figure 1b is a view showing the structure of a heat exchanger according to an embodiment of the present disclosure.

[0035] Figure 2 is a view showing a configuration of a heating member according to an embodiment of the present disclosure.

[0036] Figure 3: is a view showing an embodiment of subdividing a heating pattern of a heating member for each zone according to an embodiment of the present disclosure.

[0037] Figure 4a and Figure 4b is a view showing the structure of a heating pattern according to a first embodiment of the present disclosure.

[0038] Figure 5a , Figure 5b and Figure 5c is a view showing the structure of a heating pattern according to a second embodiment of the present disclosure.

[0039] Figure 6a , Figure 6b and Figure 6c is a view showing the structure of a heating pattern according to a third embodiment of the present disclosure.

[0040] Figure 7a , Figure 7b and Figure 7c is a view showing the structure of a heating pattern according to a fourth embodiment of the present disclosure.

[0041] Figure 8 is a view showing a state change of a heat exchanger according to an embodiment of the present disclosure.

[0042] Fig. 9 is a view showing a configuration of a water heating device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0043] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. When adding reference numerals to components of the accompanying drawings, it should be noted that the same components are represented by the same reference numerals even if the same components are drawn in different drawings. In addition, when describing embodiments of the present disclosure, when it is determined that the detailed description of related known configurations and functions may hinder the understanding of the embodiments of the present disclosure, the detailed description thereof will be omitted.

[0044] In addition, when describing the components of the embodiments of the present disclosure, terms such as first, second, "A", "B", (a) and (b) may be used. The terms are used only to distinguish components, and the nature, order and sequence of the corresponding components are not limited by the terms. Unless otherwise defined, all terms including technical or scientific terms have the same meaning as those generally understood by ordinary technicians in the field to which the present disclosure belongs. Commonly used terms (such as terms defined in dictionaries) should be interpreted as consistent with the contextual meaning of the relevant technology and are not interpreted as ideal or overly formal meanings unless clearly defined in the present disclosure.

[0045] Figure 1a and Figure 1bis a view showing a detailed structure of a heat exchanger according to an embodiment of the present disclosure. Figure 1a and Figure 1b The heat exchanger 100 may include a main body and a heating member, and the components may be formed in a stacked structure. Here, the main body is used to generate and discharge hot water after exchanging heat with heat generated by the heating member while water introduced through the water inlet flows along the flow path to the water outlet.

[0046] Therefore, the body portion may be formed by coupling the upper panel 110 , the lower panel 120 , and the flow path panel 130 .

[0047] The upper panel 110 and the lower panel 120 are formed in a plate structure, and the lower portion of the upper panel 110 and the upper portion of the lower panel 120 may be adhered to each other with the flow path panel 130 interposed between the upper panel 110 and the lower panel 120. In this case, the upper panel 110 is formed with a groove recessed in an upward direction, and the lower panel 120 is formed with a groove recessed in a downward direction, so that when the upper panel 110 and the lower panel 120 are coupled to each other, a space into which the flow path panel 130 may be inserted may be formed inside.

[0048] The flow path panel 130 may be formed in a plate-like structure in which a flow path is formed. When the upper panel 110 and the lower panel 120 are coupled to each other, the flow path panel 130 may be inserted between the upper panel 110 and the lower panel 120, and an upper portion of the flow path panel 130 may be adhered to the upper panel 110, and a lower portion of the flow path panel 130 may be adhered to the lower panel 120.

[0049] The water inlet 111 through which water is introduced may be formed on one side of the upper panel 110, and the water outlet 115 through which water is discharged may be formed on the opposite side of the upper panel 110. Then, the flow path formed in the flow path panel 130 may have one end connected to the water inlet 111 and an opposite end connected to the water outlet 115. Therefore, when water is introduced into the interior of the main body of the heat exchanger through the water inlet 111, the introduced water may flow along the flow path and may be discharged through the water outlet 115.

[0050] Here, the flow path may be formed with a long length by which the heat exchange area can be maximized in the limited volume of the main body portion to maximize the heat discharge capacity and efficiency while minimizing the volume of the heat exchanger 100. The flow path may continue while having a pattern that maximizes the length from one end connected to the water inlet 111 to the opposite end connected to the water outlet 115. As an example, the flow path may be formed to have a zigzag pattern, but is not limited thereto.

[0051] The upper panel 110 and the lower panel 120 may be formed of a material having a thermal conductivity of a predetermined value or more. As an example, the upper panel 110 and the lower panel 120 may be formed of a metal material, but are not limited thereto.

[0052] The heating member may be disposed to contact the upper portion of the upper panel 110. In the embodiment of the present disclosure, an embodiment in which the heating member is disposed to contact the upper portion of the upper panel 110 is described, but is not limited thereto, and the heating member may be disposed to contact the lower portion of the lower panel 120.

[0053] The heating member includes a heating pattern 150, and the insulating pad 140 may be formed to be adhered to upper and lower portions of the heating pattern 150. Here, the insulating pad 140 may be a plate-shaped pad coated with or composed of an insulating material.

[0054] The heating pattern 150 may be composed of a plurality of resistors. For example, the heating pattern 150 may be formed by printing. At this time, the plurality of resistors may be connected in a series structure or a parallel structure, and may be connected in a structure in which the series structure and the parallel structure are combined. Both ends of the heating pattern 150 are respectively connected to electrodes, and heat is generated when power is applied through the electrodes. Here, the heating pattern may be a surface heat emitter, but is not limited thereto.

[0055] The heat generated by the heating pattern 150 of the heating member is transferred to the flow path through the upper panel 110 contacting the heating member. Therefore, when the water introduced into the interior of the main body of the heat exchanger 100 flows along the flow path, the temperature is increased by exchanging heat using the heat transferred by the heating member, and then the heated water is discharged through the water outlet 115.

[0056] When power is supplied through the electrodes, the surface temperature of the heating pattern 150 of the heating member continuously increases. In this way, when the surface temperature of the heating pattern 150 continuously increases, the surface temperature of water flowing along the flow path continuously increases, and as the surface temperature of the water increases, scale is generated due to the deposition of calcium ions contained in the water as calcium carbonate, and this may obstruct the flow path.

[0057] Therefore, the heating member of the heat exchanger 100 according to the embodiment of the present disclosure is provided with the heating pattern 150 for preventing the generation of scale by suppressing the continuous increase in the surface temperature of water. Figure 2 The embodiments describe the detailed configuration of the heating member.

[0058] Figure 2 is a view showing the configuration of a heating member according to an embodiment of the present disclosure. Figure 2, the heating member may be formed between the water inlet 111 and the water outlet 115, and the heating pattern 150 may be formed at the center thereof. Electrodes may be connected to opposite ends of the heating pattern 150 so that power may be applied to the heating pattern 150 through the electrodes.

[0059] The heating pattern 150 may be composed of a plurality of resistors. Here, the plurality of resistors may be connected in a series structure or a parallel structure, and may be connected in a structure in which the series structure and the parallel structure are combined. At this time, the heating pattern 150 may be formed in a sawtooth shape, but is not limited thereto. Here, the sawtooth shape refers to a shape that reciprocates in a leftward / rightward direction perpendicular to the reference direction when the direction of the water inlet 111 and the water outlet 115 is determined as the reference direction.

[0060] In order to prevent scale from being generated in the flow path of the heat exchanger 100, it is necessary to suppress a continuous rise in the surface temperature of water. The surface temperature of water may be defined as shown in the following [Equation 1].

[0061] [Equation 1]

[0062]

[0063] In [Equation 1], T1 represents the surface temperature of water, T0 represents the deep temperature of water, "q" represents the power density, and "h" represents the heat transfer coefficient. As shown in [Equation 1], since the surface temperature of water is proportional to the power density, the continuous rise of the surface temperature of water can be suppressed by reducing the power density.

[0064] Here, the power density may be defined as in the following [Equation 2].

[0065] [Equation 2]

[0066]

[0067] In Equation 2, "q" represents power density, "I" represents current, R0 represents total resistance, and "w" represents the width of the heating pattern 150. Here, the width of the heating pattern 150 refers to the width of the heating pattern in the reference direction formed longer in the longitudinal direction when the direction of the water inlet 111 and the water outlet 115 is set as the reference direction and the left / right direction perpendicular to the reference direction is set as the longitudinal direction. As in Equation 2, since the power density is inversely proportional to the square of the width of the heating pattern 150, the power density may decrease when the width of the heating pattern 150 increases.

[0068] Therefore, by increasing the width of the heating pattern 150 of the heating member for each section, the power density can be gradually reduced, and thus the surface temperature of water can be suppressed from continuously rising. Therefore, the generation of scale in the flow path of the heat exchanger 100 can be prevented.

[0069] Here, the heating pattern 150 of the heating member may be formed in a zigzag pattern, and the power density may be finely adjusted by changing the width of each line of the heating pattern 150 in the zigzag pattern.

[0070] To this end, the heating pattern 150 can be divided into predetermined section units, and the width of the heating pattern 150 can be adjusted for each divided section. Preferably, the power density is gradually reduced for each section by forming the width of the heating pattern 150 in such a manner that it gradually increases as it moves from the water inlet 111 toward the water outlet 115. Figure 3 Reference will be made to this embodiment.

[0071] Figure 3 2 is a view showing an embodiment of a heating pattern of a heating member subdividing each section according to an embodiment of the present disclosure. Figure 3 , the heating pattern 150 of the heating member is formed in a zigzag shape, and may be divided into 'N' sections.

[0072] As an example, the heating pattern 150 of the heating member may be divided into six sections R1 to R6. Figure 3 Of course, this is only an example, and may be divided into less than six or six or more sections according to the embodiment. Here, the first section may be a section adjacent to the water inlet 111 , and the sixth section may be a section adjacent to the water outlet 115 .

[0073] The first section is a first divided section, and the width of the heating pattern 150 may be formed to be up to w1. The second section is a second divided section, and the width of the heating pattern 150 may be formed to be up to w2, w2 being greater than w1. The third section is a third divided section, and the width of the heating pattern 150 may be formed to be up to w3, w3 being greater than w2. The fourth section is a fourth divided section, and the width of the heating pattern 150 may be formed to be up to w4, w4 being greater than w3. The fifth section is a fifth divided section, and the width of the heating pattern 150 may be formed to be up to w5, w5 being greater than w4. Similarly, the sixth section is a sixth divided section, and the width of the heating pattern 150 may be formed to be up to w6, w6 being greater than w5.

[0074] In this manner, when the heating pattern is divided into six sections and the width of the heating pattern 150 gradually increases for each section, the power density gradually decreases as it goes from the first section to the sixth section.

[0075] For example, when the width of the heating pattern 150 in the first section is w1=7.2 mm, the power density is 527,000 W / m 2 , and when the width of the heating pattern 150 in the sixth section is w6=10.4 mm, the power density is 246,000 W / m 2 Therefore, as the surface temperature of water flowing along the flow path in the interior of the body portion of the heat exchanger 100 decreases due to the reduction in power density, it is possible to prevent scale from being generated in the flow path.

[0076] Here, since the heating member according to the present disclosure can reduce the power density only by adjusting the width of the heating pattern 150 for each divided section, no additional electrode is required to reduce the power density. Therefore, no additional facilities are required to prevent scale from being generated in the flow path in the heat exchanger 100, and scale can be prevented from being generated in the flow path while preventing the cost from increasing due to the additional facilities.

[0077] Here, the heating pattern 150 may be composed of a plurality of resistors, and each resistor may be connected in a series structure or a parallel structure or a combination structure of the series and parallel structures.

[0078] Therefore, reference will be made to Figures 4a to 6c The embodiment of FIG. 1 describes the connection structure of the heating pattern 150 .

[0079] Figure 4a and Figure 4b is a view showing the structure of a heating pattern according to a first embodiment of the present disclosure, Figure 5a , Figure 5b and Figure 5c is a view showing a structure of a heating pattern according to a second embodiment of the present disclosure, Figure 6a , Figure 6b and Figure 6c is a view showing a structure of a heating pattern according to a third embodiment of the present disclosure, and Figure 7a , Figure 7b and Figure 7c is a view showing the structure of a heating pattern according to a fourth embodiment of the present disclosure.

[0080] First, refer to Figure 4a and Figure 4b The heating pattern 150 according to the first embodiment may be implemented in the form of a plurality of resistors connected in series. When the heating pattern 150 is connected in series as in the first embodiment, since the width of each line of the heating pattern 150 formed in a zigzag shape can be adjusted, the power density can be subdivided and gradually reduced by the number of lines of the heating pattern 150.

[0081] First, refer to Figure 5a , Figure 5b and Figure 5c The heating pattern 150 according to the second embodiment can be implemented in the form of a plurality of resistors connected in a parallel structure. When the heating pattern 150 is connected in a parallel structure as in the second embodiment, since the width of each pair of lines of the heating pattern 150 formed in a zigzag shape can be adjusted, the power density can be subdivided and gradually reduced by the number of line pairs of the heating pattern 150.

[0082] In this manner, when the heating patterns 150 are connected in a parallel structure, current stress may be reduced because the current applied to the heating patterns 150 is half of the total current.

[0083] First, refer to Figure 6a , Figure 6b and Figure 6c , the heating pattern 150 according to the third embodiment may be implemented in a form in which a plurality of resistors are connected in a combination structure of a series structure and a parallel structure. When the heating pattern 150 is connected in a series / parallel combination structure as in the third embodiment, since the width of each pair of lines of the heating pattern 150 formed in a zigzag shape can be adjusted, the power density can be subdivided by the number of line pairs passing through the heating pattern 150 and the power density can be gradually reduced.

[0084] In this manner, when the heating patterns 150 are connected in a series / parallel combination structure, even when any one line of a line pair of the parallel-connected heating patterns 150 is damaged, output may be achieved through the other line.

[0085] refer to Figure 7a , Figure 7b and Figure 7c The heating pattern 150 according to the fourth embodiment may be implemented in a form in which a plurality of resistors are connected in a combination structure of a parallel structure (i.e., a parallel / parallel combination structure). As in the fourth embodiment, when the heating pattern 150 is connected in a parallel / parallel combination structure, the resistance is determined by the length of the heater due to the characteristics of the parallel connection.

[0086] Therefore, the heating pattern 150 is formed such that the length of the heater increases as it extends from the water inlet to the water outlet, the resistance increases as the length of the heater increases, and thus the power density decreases stepwise.

[0087] The power density according to the fourth embodiment can be defined as in the following [Equation 3].

[0088] [Equation 3]

[0089]

[0090] In Equation 3, "q" represents power density, "V" represents voltage, R0 represents total resistance, and "I" represents the length of the heating pattern 150. Here, the length of the heating pattern 150 refers to the length of the heating pattern in a direction perpendicular to the reference direction when the directions of the water inlet 111 and the water outlet 115 are determined as the reference direction. As in Equation 3, since the power density is inversely proportional to the square of the length of the heating pattern 150, the power density may decrease when the length of the heating pattern 150 increases.

[0091] In this manner, when the heating patterns 150 are connected in the parallel / parallel combination structure, current stress is reduced compared to the series type because the current applied to the heating units is reduced due to the parallel connection.

[0092] In the heating pattern 150 according to the first to fourth embodiments, as the line width of the heating pattern 150 gradually increases for each section as the heating pattern 150 extends from the water inlet 111 to the water outlet 115, the power density gradually decreases, and thus, scale generation in the flow path can be prevented by suppressing a continuous increase in the surface temperature of water flowing along the flow path. The change in the state of the heat exchanger due to the adjustment of the width of the heating pattern 150 of the heating member can be as follows: Figure 8 shown.

[0093] Figure 8 is a view showing a state change of a heat exchanger according to an embodiment of the present disclosure. Figure 8 , reference numerals 811, 813, and 815 denote state changes before the width of the heating pattern 150 is adjusted, reference numeral 811 denotes the surface temperature of water, reference numeral 813 denotes the deep temperature of water, and reference numeral 815 denotes a change in power density.

[0094] Before the width of the heating pattern 150 is adjusted, since the power density of the heating pattern 150 is continuously maintained as in reference numeral 815 , the surface temperature of the water gradually rises.

[0095] Therefore, as the surface temperature of the water continues to increase, as in reference numeral 811, scale may be generated in which calcium ions are deposited as calcium carbonate on the surface of the water.

[0096] Meanwhile, reference numerals 821 , 823 , and 825 denote state changes after the width of the heating pattern 150 is adjusted, reference numeral 821 denotes a surface temperature change of water, reference numeral 823 denotes a deep temperature of water, and reference numeral 825 denotes power density.

[0097] In an embodiment of the present disclosure, by dividing the heating pattern 150 into six sections and adjusting the width of the heating pattern 150 for each section so that they gradually become larger, as shown by reference number 825, the power density of the heating pattern 150 for each section gradually decreases, and therefore, the surface temperature of the water for each section decreases.

[0098] Therefore, the surface temperature of the water decreases for each section as shown in reference numeral 821. In this case, since the power density remains the same in the same section, the surface temperature of the water gradually increases, but when in the next section, since the power density decreases, the surface temperature of the water partially decreases.

[0099] In this way, in the heat exchanger 100 according to an embodiment of the present disclosure, by gradually reducing the power density of each section of the heating pattern 150, the surface temperature of the water can be prevented from continuously rising, and therefore, the highest water surface temperature can be prevented from exceeding a predetermined temperature, and therefore, scale can be prevented from being generated on the surface of the water in the flow path.

[0100] The heat exchanger 100 configured as described above may be configured to be included in a water heating device, such as an electric boiler or a water heater.

[0101] Therefore, reference will be made to Fig. 9 The embodiments describe the configuration of a water heating device including a heat exchanger according to an embodiment of the present disclosure.

[0102] Fig. 9 2 is a view showing a water heating device according to an embodiment of the present disclosure. Fig. 9 , the water heating device 10 may correspond to an electric boiler or a water heater that stores and heats water.

[0103] Therefore, the water heating device 10 may include a control unit 12 and a thyristor 13 configured to receive current from an external power source, supply it to the heating device for heating water, and control on / off of the supply of current by the control unit 12. In addition, the water heating device may further include a heat exchanger 100.

[0104] The heat exchanger 100 can generate hot water from room temperature direct water supplied through the direct water supply line by exchanging heat with the direct water, and can discharge the generated hot water to the hot water discharge line. Figures 1a to 8 The detailed configuration of the heat exchanger 100 is described with reference to an embodiment of the present invention.

[0105] Then, the direct water supply line may be provided with a temperature sensor 15 for measuring the temperature of the supplied direct water and a flow rate sensor 14 for measuring the amount of the supplied direct water, and the hot water discharge line may be further provided with a temperature sensor 16 for measuring the temperature of the discharged hot water.

[0106] Fig. 9 The configuration of the water heating device shown is an embodiment, and other configurations except the heat exchanger may be modified according to the embodiment.

[0107] The above description is a simple exemplary description of the technical spirit of the present disclosure, and a person skilled in the art to which the present disclosure belongs may make various corrections and modifications without departing from the essential features of the present disclosure.

[0108] Therefore, the embodiments disclosed in the present disclosure are not used to limit the technical spirit of the present disclosure, but to describe them, and the scope of the technical spirit of the present disclosure is not limited by the embodiments. The protection scope of the present disclosure should be interpreted by the attached claims, and all technical spirits within the equivalent scope should be interpreted as included in the scope of the present disclosure.

Claims

1. A heat exchanger comprising: a heating member, the heating member comprising a heating pattern of a predetermined shape, the heating pattern being used to generate heat; as well as a main body portion for exchanging heat generated by the heating member to generate and discharge hot water when water introduced through the water inlet flows along the flow path to the water outlet, The heating pattern is divided into a plurality of sections and is formed such that widths of the heating pattern are different for the divided plurality of sections.

2. The heat exchanger according to claim 1, wherein: The heating pattern is formed along a flow direction of the water along the flow path.

3. The heat exchanger according to claim 2, wherein: The heating pattern is formed in a zigzag shape.

4. The heat exchanger according to claim 1, wherein: The main body comprises: an upper panel in which the water inlet and the water outlet are formed; a lower panel coupled to the upper panel at a lower portion of the upper panel; and a flow path panel in which the flow path is formed and formed to be adhered between the upper panel and the lower panel when the upper panel and the lower panel are coupled to each other, and The flow path panel is formed such that ends of the flow path are connected to the water inlet and the water outlet.

5. The heat exchanger according to claim 4, wherein: The heating member is formed to be adhered to an upper portion of the upper panel and is formed between the water inlet and the water outlet.

6. The heat exchanger according to claim 4, wherein: The heating pattern is formed such that a width of the heating pattern gradually increases as extending from the water inlet connected to the flow path toward the water outlet.

7. The heat exchanger according to claim 6, wherein: The heating pattern is formed such that a width of the heating pattern gradually increases with respect to the divided sections, and the width of the heating pattern is the same in the same section.

8. The heat exchanger according to claim 6, wherein: The heating pattern is formed such that, for the divided sections, power density of the divided sections decreases extending from the water inlet to the water outlet of the flow path connected to the heat exchanger.

9. The heat exchanger according to claim 1, wherein: The heating pattern includes a plurality of resistors, and the plurality of resistors are connected in a series structure.

10. The heat exchanger according to claim 1, wherein: The heating pattern includes a plurality of resistors, and the plurality of resistors are connected in a parallel structure.

11. The heat exchanger according to claim 1, wherein: The heating pattern includes a plurality of resistors, and the plurality of resistors are connected in a combination structure of a series connection and a parallel connection.

12. The heat exchanger according to claim 1, wherein: The heating pattern includes a plurality of resistors, and the plurality of resistors are connected in a combination structure of a parallel structure.

13. The heat exchanger according to claim 1, wherein: The heating component further comprises: Insulation pads are formed to be attached to upper and lower portions of the heating pattern.

14. A water heating device comprising the heat exchanger according to any one of claims 1 to 13.

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