Heating device of dish washing machine and clothes care equipment

Abstract

The present application is a device for heating water installed in a water storage space in a dish-washing machine and a washing machine, the device comprising: a heating plate having a predetermined thickness and forming a heating surface on the outer surface; a heating electrode layer formed on an inner surface of a side opposite to the heating surface of the heating plate while providing a pair of first electrode pads on one side; the shell is used for fixing the heating plate at a lower opening, so that the heating surface is exposed; the bracket is connected while sealing the side opening of the shell; a pair of first lead electrodes having a first contact terminal at one end and a first lead terminal at the other end, penetrating through the holder and integrally connected to the holder; and a pair of contact guide members connected to the inner surface of the housing and provided with first pressing protrusions that press the first lead electrodes so as to bring the first contact terminals into contact with the first electrode pads.

Description

Technical Field

[0001] The present invention relates to a heating device, and more particularly to a heating device installed in a dishwasher, a washing machine and the like for instantaneously heating washing water. Background Art

[0002] Generally, a dishwasher is a household appliance that washes away food residues on the surface of dishes by spraying high-pressure water through a nozzle. These dishwashers are equipped with a heating device that heats the washing water to a high temperature, and the heating device heats the washing water to a predetermined temperature and then sprays the heated water for washing.

[0003] In addition, washing machines that can perform boiling or steam washing by heating the washing water in the water storage tank have recently been launched. These washing machines are also equipped with heating devices inside to heat the incoming washing water to a predetermined temperature and then start the washing process.

[0004] In this way, since the heating device is integrated in the dishwasher or the washing machine, even if normal temperature water is supplied, the heating device will work and heat it to a temperature suitable for washing, so there is no need to connect a separate faucet for supplying hot water.

[0005] Figure 1 is a cross-sectional view showing the overall structure of a drum washing machine, Figure 2 is a perspective view showing a heating device of a drum washing machine according to the prior art.

[0006] See also Figure 1 The drum washing machine generally comprises a housing 1 forming an internal storage space, a water storage tank 2 (or tub) installed inside the housing 1, a washing tank 3 (or drum) rotatably installed inside the water storage tank 2, a heating device 4 (or heater) installed between the water storage tank 2 and the washing tank 3, and a driving motor 5 for rotating the washing tank 3. In addition, a water supply port and a detergent supply port are respectively provided at the upper portion of the housing 1 of the drum washing machine, and a drainage port is provided at the bottom.

[0007] The heating device 4 consists of a jacket heater for boiling water or generating steam for boiling washing, steam washing or sterilization. Figure 2 The heating device 4 has a heating part 11 for generating heat, a bracket 12 for fixing one end of the heating part 11 and mounted on the water storage tank 2, and a terminal 13 that passes through the bracket 12 and is connected to the inside of the heating part 11 to supply electricity. A coil-shaped heating wire (not shown) is provided inside the heating part 11, and the heating wire is connected to the terminal 13 through a temperature fuse (not shown) to prevent overheating.

[0008] The heating device of the above structure can be applied not only to washing machines, but also to dishwashers, dryers and fresheners. When water is supplied to the water storage tank 2 and filled with water, the heating device 4 operates to heat the water. After the water is heated to a predetermined temperature, each device operates to perform washing, cleaning, drying, refreshing and other processes.

[0009] At the same time, the tap water supplied to the water tank contains limestone. Water with this component is called "hard water". The heat generated when the heating device boils water causes the lime component contained in the normal water to adhere to the high-temperature surface of the heating device, forming a lime layer. The limestone layer generated in this hard water will hinder the direct contact between the heating surface and water, causing the heating part to overheat, thereby damaging the heating surface or shortening the life of the heating device.

[0010] In addition, the existing heating devices used in drum washing machines, dishwashers and other equipment are all operated after the water tank is completely filled with water, that is, after the supply of washing water or cleaning water is completed. Therefore, there is a disadvantage that it takes a long time from the water supply to the water being heated and the washing or cleaning process. Summary of the invention

[0011] Technical issues to be solved The present invention is proposed in view of the above problems, and its object is to provide a heating device that can solve the problem of device failure and shortened life due to the formation of lime layer under hard water conditions.

[0012] Another object of the present invention is to provide a heating device capable of shortening the management time from water supply to heating and washing of clothes.

[0013] Another object of the present invention is to provide a heating device capable of improving the accuracy of detecting the level of water supplied to a water storage tank.

[0014] Another object of the present invention is to provide a heating device capable of preventing malfunctions due to poor contact by ensuring stable contact between contact terminals of a lead electrode for supplying power and electrode pads of a heating electrode layer for heating.

[0015] Another object of the present invention is to provide a heating device that can prevent electrical interference (eg, sparks) that may occur between a plurality of lead electrodes and sensor electrodes, thereby ensuring safety in use.

[0016] Technical Solution In order to achieve the above-mentioned purpose, the heating device for managing dishwashers and washing machines of the present invention is a device for heating water installed in a water storage space in a dishwasher and a washing machine, which includes: a heating plate having a predetermined thickness and forming a heating surface on the outer surface; a heating electrode layer formed on the inner surface of the heating plate on the opposite side of the heating surface, and a pair of first electrode pads are arranged on one side; a shell, fixing the heating plate at the lower opening to expose the heating surface; a bracket, connected while sealing the side opening of the shell; a pair of first lead electrodes, one end of which has a first contact terminal and the other end has a first lead terminal, and passes through the bracket and is integrally connected to the bracket; and a pair of contact guide members, having a first pressing protrusion and connected to the inner surface of the shell, the first pressing protrusion presses the first lead electrode to make the first contact terminal contact with the first electrode pad.

[0017] The heating device of this embodiment further includes: a resistance electrode layer, which is formed in an area on the inner surface of the heating plate that does not overlap with the heating electrode layer, and a pair of second electrode pads are provided on one side; and a pair of second lead electrodes, one end of which has a second contact terminal and the other end has a second lead terminal, and passes through the bracket and is integrally connected to the bracket, and the contact guide member also has: a second pressing protrusion, which is used to pressurize the second lead electrode so that the second contact terminal is in contact with the second electrode pad.

[0018] In addition, the heating device further includes a water level detection sensor integrally connected to the bracket so that one end is exposed to the housing; and is configured to heat water when the water level detection sensor detects that water is filled.

[0019] Furthermore, the housing forms a water channel isolated from the outside by a partition wall having a through hole for water to flow in or out, and the water level detection sensor is installed with one end exposed in the water channel and is used to detect the water level of water flowing into the water channel.

[0020] Furthermore, the heating surface is formed by bending a central area of ​​the heating plate so as to be concave inwardly.

[0021] In addition, the heating surface has an inclined structure with different bending depths.

[0022] Beneficial Effects The present invention eliminates heating interference caused by lime layer formation by forming a heating electrode pattern at a predetermined interval and width, thereby having the effect of solving the problem of malfunction and damage of the heating device caused by the lime layer. Furthermore, the present invention has the effect of greatly improving the water level detection accuracy by detecting the water level under the condition that the water level detection sensor minimizes the waves of the water supply.

[0023] Furthermore, since the present invention starts heating from the moment water starts to fill up the bottom of the water storage tank, it has the effect of reducing the total time of the heating, washing or cleaning operation.

[0024] Furthermore, the present invention provides an appropriate contact force between the lead electrode and the electrode pad by using the elastic material guide, which has the effect of preventing malfunctions due to poor contact.

[0025] In addition, the present invention prevents electrical interference between the lead electrode and the sensing electrode (resistance electrode) by not placing them on the same horizontal line, thereby improving the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 2 is a diagram showing the overall structure of a drum washing machine.

[0027] Figure 2 2 is a diagram showing a heating device of a drum washing machine according to the prior art.

[0028] Figure 3 2 is a diagram showing a heating device of a drum washing machine according to the present embodiment.

[0029] Figure 4 Observe from the bottom Figure 3 Diagram of the heating device.

[0030] Figure 5 yes Figure 3 Exploded view of the heating unit.

[0031] Figure 6 It is shown Figure 3 A cross-sectional view of the heating device in the AA direction.

[0032] Figure 7 It is shown Figure 3 FIG. 5 is a cross-sectional view of the heating device in the BB direction.

[0033] Figure 8 It is shown Figure 3 Conceptual diagram of a state where a heating device is immersed in washing water.

[0034] Fig. 9 is a diagram showing the internal structure of a housing which is a main part of the heating device of this embodiment. Fig.10 is shown as Fig. 9 FIG. 1 is a diagram of the main parts of the contact guide member.

[0035] Fig.11 : is a diagram showing the electrode connection structure of the heating device according to the present embodiment. DETAILED DESCRIPTION

[0036] The technical problem to be solved by the present invention and its implementation method will be clarified through the preferred embodiments described below. The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] It should be understood that the differences in the following embodiments are not mutually exclusive. That is, without departing from the technical spirit and scope of the present invention, the specific shapes, structures and features described with respect to one embodiment can be implemented in other embodiments, and the positions of the various components in the various disclosed embodiments should be understood, the arrangement may change, and similar reference numbers in the figures always represent the same or similar functions, and the length, area, thickness, etc. and their shapes may be exaggerated for convenience. In the description of this embodiment, expressions such as upper, lower, front, rear, first, second, etc. represent relative positions, directions or orders, and their technical meanings are not subject to the meaning of dictionaries.

[0038] Figure 3 and Figure 4 is a diagram of a heating device of a drum washing machine according to this embodiment viewed from the top and bottom, Figure 5 Displayed in decomposed form Figure 3 Figure 1. Heating device diagram. Figure 6 and Figure 7 It is shown Figure 3 The cross-sectional view of the heating device in the AA direction and the BB direction, Figure 8 It is conceptually shown Figure 3 The heating device of this embodiment is described by taking a device for heating washing water in a washing machine as an example.

[0039] First, see Figures 3 to 5 The heating device 100 of this embodiment includes a heating plate 110 that generates heat, a heating electrode layer 120 formed on the upper side of one side of the heating plate, and a resistive electrode layer 130 formed on the upper surface of the heating plate 110 in an area that does not overlap with the electrode layer 120, a shell 140 that accommodates and protects the heating plate 110, and a bracket 150 for installing the heating device 100 in the water storage tank 2 of the washing machine, a first lead electrode 160 connected to the bracket 150 and supplying power to the heating electrode layer 120, a second lead electrode 170 connected to the bracket 150 and supplying power to the resistive electrode layer 130, and a water level sensor 180 installed on the shell.

[0040] When the heating device 100 is powered on through the pair of first lead electrodes 160 , current flows along the heating electrode layer 120 , generating high-temperature heat in the heating electrode layer 120 . The generated heat is released through the heating plate 110 and heats water in contact with the surface of the heating plate 110 .

[0041] The heating plate 110 used for this purpose is made of a material having excellent thermal conductivity and insulation properties. In addition, the heating plate 110 is composed of a plate having a predetermined thickness, the central area is bent concavely, and the concave surface (bottom surface) forms a heating surface 111 to heat water in contact therewith. For example, the heating plate 110 is made of a square plate made of SUS material, and the central area is bent concavely into a square shape.

[0042] Meanwhile, when high-temperature heat is generated in the heating electrode layer 120, a temperature difference is generated between the central area where the electrode layer is formed and the edge area where the electrode layer is not formed in the heating plate 110, and due to this temperature difference, the plate may bend or the plate may be deformed or twisted. Since the thermal deformation of the heating plate 110 due to temperature deviation becomes more obvious as the plate thickness becomes thinner, the simple plate-shaped heating plate 110 must have a thickness greater than a predetermined value to prevent thermal deformation. Therefore, the simple plate-shaped heating plate 110 has the disadvantages of being limited in reducing the thickness, increasing the weight of the heating device, and increasing the manufacturing cost due to the material cost.

[0043] However, when the bending process described in this embodiment is used to form a concave heating surface 111 in the central area, the two sides of the heating surface 111 act as reinforcing ribs, so the reduced thickness of the heating plate 110 also has the effect of preventing thermal deformation. For example, the heating plate 110 of this embodiment can be composed of a thin plate with a thickness of less than 0.6 mm.

[0044] In addition, if Figure 4 and Figure 6 As shown, the heating plate 110 of this embodiment has a concave heating surface 111 of an inclined structure. That is, the heating space 111a below the heating plate 110 formed by the groove is formed relatively deep on one side and becomes increasingly shallow toward the other side.

[0045] The heating device 100 is operated while the inside of the washing machine is immersed in water, and after washing is completed, the contaminated washing water is discharged. At this time, in order to prevent the washing water from remaining on the heating surface 111 of the groove, it is preferably installed with the concave heating surface 111 facing downward. As a result, the surface (bottom surface) of the heating plate 110 is directed upward to form the heating surface 111 in the shape of a groove, and a heating space 111a is formed therebelow. At this time, when the water storage tank 2 of the washing machine is filled with water, air pockets may be formed in the concave heating space 111a.

[0046] Meanwhile, when the heating surface 111 is formed horizontally and parallel to the water surface, air pockets are formed in the entire area of ​​the heating surface 111. Even if the water storage tank 2 is filled with water, the water does not contact the heating surface 111 due to the air pockets, and the heating plate 110 may be overheated and damaged. However, as shown in the present embodiment, in the case where the heating surface 111 has an inclined structure, the air pockets are formed only in a portion of the uppermost portion of the heating space 111a, and are formed in the heating space 111a. Since no electrode layer is formed, the heating plate 110 can be prevented from being damaged due to overheating of the air pockets 110.

[0047] In addition, the heating plate 110 of the present embodiment is finely processed so that the edge end is bent or curled to one side to form a reinforcing flange 112. The reinforcing flange 112 can prevent deformation of the heating plate 110. Preferably, the height of the reinforcing flange 112 is formed lower than the heating surface 111 so as not to interfere with the process of forming the heating electrode layer 120 on the heating surface 111.

[0048] In addition, the heating plate 110 of this embodiment can be combined with the housing 140 by fastening means such as screws, but can also be combined by the structure of the heating plate 110 and the housing 140. To this end, a plurality of fastening holes 113 are formed on the reinforcing flange 112 of the heating plate 110, and a plurality of hook-shaped fastening protrusions 141 are formed on the housing 140 at positions corresponding to the fastening holes 113.

[0049] The heating electrode layer 120 may be formed by printing a conductive heating paste having a predetermined resistance on the surface of the heating plate 110, and is formed on the surface (top surface) of the heating plate 110 opposite to the heating surface 111. The heating electrode layer 120 may be formed in a strip shape having a predetermined width and length, and a pair of first electrode pads 121 in contact with the first lead electrode 160 are provided at both ends. The heating electrode layer 120 may be formed as a series or parallel electrode line between the pair of first electrode pads 121.

[0050] At the same time, reference Figure 7 , the electrode lines forming the heating electrode layer 120 are formed to have a predetermined width W and a pitch P. The heat generated by the heating electrode layer 120 is transferred to the heating plate 110, and the water in contact with the heating plate 110 is heated. At this time, a lime layer 120' is formed on the opposite side (i.e., the heating surface) of the heating plate 110 where the heating electrode layer 120 is formed, corresponding to the position of the heating electrode layer 120.

[0051] The lime layer 120' gradually grows around the electrode line of the heating electrode layer 120, and as it grows, it can be connected to the adjacent lime layer 120'. In this case, the heating surface 111 is connected to the lime layer 120'. If it is covered, the heat transferred from the heating electrode layer 120 may not be released quickly, eventually causing the heating device 100 to malfunction or be damaged.

[0052] In order to prevent this, the heating electrode layer 120 is formed to have a predetermined width W and a spacing P, and in the present embodiment, the heating electrode layer 120 is formed to have a gap P of at least one third of the width W (P ≥ 1 / 3 W). That is, in order to transfer high-temperature heat to the heating plate 110, preferably, the heating electrode layer 120 is formed with the widest possible width W and the narrowest gap P, and in order to prevent malfunction or damage due to the lime layer 120', a gap P of at least 1 / 3 of the width W must be ensured between adjacent electrode lines forming the heating electrode layer 120.

[0053] The resistive electrode layer 130 is formed by printing a conductive heating paste having a predetermined resistance on the surface of the heating plate 110 in the area where the heating electrode layer 120 is not formed, that is, between the heating electrode layers 120. The resistive electrode layer 130 may be formed in a strip shape having a predetermined width and length, and a pair of second electrode pads 131 contacting the second lead electrode 170 are provided at both ends.

[0054] The resistance electrode layer 130 measures the resistance of the heating electrode layer 120 according to the temperature, so that the temperature of the heated water can be predicted. Since the resistance generally changes with the temperature, the resistance electrode layer 130 measures the resistance of the heating electrode layer 120 that changes with the temperature of the heating plate 110 to measure the heating plate 110 that heats the water to control the power supplied to the heating electrode layer 120 so that it is heated to a predetermined temperature. The resistance electrode layer 130 used for this purpose can be formed by printing a conductive paste of the same material as the heating electrode layer 120. In addition, the resistance electrode layer 130 is connected to an external resistance measurement module through the second lead electrode 170.

[0055] At the same time, the resistance electrode layer 130 can predict the temperature of the water by measuring the resistance of the heating electrode layer 120, but it can also be used as another heating electrode layer for heating the heating plate 110. That is, the heating device 100 can use the heating plate 110 to heat a local area as needed. At this time, the resistance electrode layer 130 is formed to have a relatively narrow area and is composed of a conductive paste of the same material as the heating electrode layer 120, so that electricity can be applied to the resistance electrode layer 130, so that the heating plate 110 is locally heated, which will cause heat. Thus, the resistance electrode layer 130 can be configured to be selectively connected to an external resistance measurement module or a power supply module through the second lead electrode 170.

[0056] When the resistance electrode layer 130 is used as a heat generating electrode layer, the lime layer may also be formed by the resistance electrode layer 130 , and thus the resistance electrode layer 130 is preferably formed to have at least one third of the width of the heat generating electrode layer 120 .

[0057] In this way, the heating electrode layer 120 and the resistance electrode layer 130 formed by printing the conductive paste can be reused as the heating plate 110 by washing the printed layer even if defects occur during the printing process. Therefore, it is possible to minimize the waste of resources caused by defects in the manufacturing process and prevent environmental pollution.

[0058] The housing 140 is made of a highly heat-resistant non-conductive material, the lower opening is connected to the heating plate 110, and the side opening is connected to the bracket 150. The heating plate 110 and the bracket 150 are connected to the housing 140 through the first seal 114 and the second seal 154, respectively. The housing 140 accommodates the heating plate 110, the first lead electrode 160 and the second lead electrode 170 in the internal space to insulate and protect from the outside.

[0059] In addition, a groove-shaped water channel 142 is formed along the edge of the upper surface of the housing 140. The water channel 142 is isolated from the outside by a partition wall 143 at the outer end, and is connected to the outside through a through hole 144 at the front end of the housing 140. Therefore, when the heating device 100 is installed in the washing machine, when the water storage tank 2 is full of water, the water flows into the water channel 142 through the through hole 144 and fills the water, and when the washing is finished and the water is drained, the water filled in the water channel 142 is discharged through the through hole 144. One end of the water level detection sensor 180 is exposed in the water channel 142 to detect the water level of the water in the water storage tank 2.

[0060] In addition, the housing 140 may be formed with a concave arc-shaped escape groove 145 on the upper surface. The escape groove 145 is formed as a curved surface in a direction corresponding to the circumference of the washing tub 3, and preferably has a curvature corresponding to the circumference of the washing tub 3.

[0061] Generally, a drum washing machine is equipped with a driving motor 5 having a rotating shaft on one side of the housing 1, and the washing tub 3 is placed horizontally, and one side of the washing tub 3 is connected to the rotating shaft. At this time, as the rotating shaft rotates, the washing tub 3 also rotates, and one side of the washing tub 3 is fixed by the rotating shaft and rotates, but the other side (door side) shakes slightly and rotates with a trajectory greater than the actual radius of the washing tub 3. In addition, the heating area of ​​the heating device 100 overlaps with the washing tub 3 and is located at the bottom of the washing tub 3, and is connected as close to the washing tub 3 as possible in order to effectively utilize the space inside the washing machine and save space as much as possible.

[0062] At this time, since the washing tub 3 rotates with a trajectory greater than the actual radius, there is a risk of collision between the washing tub 3 and the heating device, i.e., the housing 140. Therefore, the heating device 100 of this embodiment is provided with a concave avoidance groove 145 corresponding to the circumference of the washing tub 3 on the upper surface of the housing 140, so that when the washing machine is running, the housing 140 and the washing tub 3 can be prevented from colliding or interfering. In addition, since the heating device 100 of this embodiment is provided with the avoidance groove 145 in the housing 140, the heating device of the sheath structure can be replaced with the heating device of the surface structure without changing the structure of the existing washing machine, and can be compatible with the heating device.

[0063] The bracket 150 is connected to the housing 140, seals the side opening of the housing 140, fixes the first lead electrode 160, the second lead electrode 170 and the water level sensor 180, and the heating device 100 is connected and installed with the water storage tank 2. The bracket 150 is provided with a fastening device 151 of a bolt or nut structure for fastening to the housing 110, and a grounding terminal 152 may also be provided on the outside.

[0064] The first lead electrode 160 is used to supply power to the heating electrode layer 120, and may be a pair of conductive metal wires. One end of the first lead electrode 160 forms a first contact end 161 extending downward and protruding into the housing 140 to contact the first electrode pad 121, and the other end is exposed to the outside of the bracket 150, forming a first lead terminal 162 and connected to a power module (not shown).

[0065] The second lead electrode 170 is used to supply power to the resistance electrode layer 130, and may be a pair of conductive metal wires. One end of the second lead electrode 170 forms a second contact end 171 extending into the housing 140 and protruding downward to contact the second electrode pad 131, and the other end is exposed to the outside of the bracket 150 to form a second lead terminal 172, which can be optionally connected to a resistance measurement module or a power supply module.

[0066] The second seal 154 is pre-attached to the outer surface of the housing 140 to which the bracket 150 is attached. The second seal 154 is interposed between the housing 140 and the bracket 150 to seal the space therebetween, and at the same time, when the bracket 150 is fastened to the water storage tank 2, the space between the housing 140 and the water storage tank 2 is sealed, thereby preventing water in the water storage tank 2 from leaking.

[0067] The water level detection sensor 180 is used to detect the water level of the water (washing water) in the water storage tank so that the heating device can work. When the water level sensor 180 detects the presence of water, the heating device 100 can work, that is, water is added to the water level that immerses the heating device 100, so that the heating device can be driven during the process of the water storage tank 2 being filled with water. Therefore, since the heating device 100 is pre-activated to heat the water before the water storage tank is completely filled with a washable amount of water, the time required to heat the water to a washable temperature can be shortened. The water level detection sensor 180 used for this purpose can be composed of a pair of sensor electrodes, one end of which extends into the waterway 142 of the housing 140 and the other end is exposed to the outside of the bracket 150. The device for detecting the water level is not limited to this, but can be composed of various types of sensor components.

[0068] In addition, the water level detection sensor 180 is installed in the waterway 142 which is isolated from the outside by the partition wall 143. Generally, wave water (ripples) will appear during the process of filling the water storage tank 2, and the accuracy of water level detection may be significantly reduced due to the waves. Figure 8 As shown, when the waterway 142 is protected by the partition wall 143, severe waves w will be generated in the water outside the waterway 142, but when the water flows into the waterway 142, the water level rises steadily and no waves are generated, which can improve the accuracy of water level detection.

[0069] At the same time, if Figure 5 As shown, the bracket 150 forms a module while fixing the first lead electrode 160, the second lead electrode, and the water level detection sensor 180. At this time, one end of the first lead electrode 160, the second lead electrode 170, and the water level sensor 180 all extend into the inside of the bracket 150, and the other end is exposed outside the bracket 150. The bracket 150 is made of injection molding insulating material, and the first lead electrode 160, the second lead electrode, and the water level sensor 180 are made of conductive metal material, so that the first lead electrode 160, the second lead electrode 170, and the water level sensor 180 can be formed into one piece by using insert water through a double injection insert molding process.

[0070] Fig. 9 FIG. 1 is a diagram showing the internal structure of the shell, which is the main part of the heating device of this embodiment. Fig.10 for Fig. 9 A schematic diagram of the main part, namely the contact guide, Fig.11 1 is a diagram showing the electrode contact structure of the heating device of this embodiment.

[0071] The heating device 100 of the present embodiment further includes a pair of contact guide members 190 disposed within the housing 140. The contact guides 190 guide electrical contact between the first lead electrode 160 and the second lead electrode 170.

[0072] The first lead electrode 160 and the second lead electrode 170 are connected to the first contact terminal 161 and the second contact terminal 171 by contacting the first electrode pad 121 and the second electrode pad 131, respectively, to supply power to the heating electrode layer 120 and the resistance electrode layer 130. Therefore, the electrical contact between the first contact terminal 161 and the first electrode pad 121, and the electrical contact between the second contact terminal 171 and the second electrode pad 131 must be ensured.

[0073] In the heating device 100 of the present embodiment, the bracket 150 is assembled into the housing 140, and the first lead electrode 160 and the second lead electrode 170 are inserted into the housing, so as to connect the first contact terminal 161 and the second contact terminal 171 to contact the first electrode pad 121 and the second electrode pad 131. In this process, there is a risk of poor contact between the first contact terminal 161 and the first electrode pad 121, and between the second contact terminal 171 and the second electrode pad 131. In particular, as in the present embodiment, the surface (upper surface) of the metal plate 110 forming the first electrode pad 121 and the second electrode pad 131 is tilted downward (i.e., reversely tilted) relative to the assembly direction of the lead electrodes 160 and 170, and when the contact terminals 161 and 171 are formed, a gap is very likely to be formed between the electrode pads 121 and 131, resulting in poor contact between them.

[0074] Therefore, when the lead electrodes 160 and 170 are inserted into the housing 140, the contact guide member 190 presses the lead electrodes 160 and 170 to guide the contact terminals 161 and 171 to contact the electrode pads 121 and 131. To this end, the contact guide member 190 can be made of an elastic material with a predetermined elasticity, for example, a silicon block. In addition to being made of a silicone block, the contact guide member 190 can also be made of various elastic materials such as an elastic sheet, an elastic buffer, and a spring.

[0075] Specifically, Fig.10 As shown, the contact guide member 190 includes a first pressing protrusion 191 pressing the first lead electrode 160 and a second pressing protrusion 192 pressing the second lead electrode 170. The first pressing protrusion 191 and the second pressing protrusion 192 are formed parallel to each other at positions where the first lead electrode 160 and the second lead electrode 170 are inserted. Specifically, the first pressing protrusion 191 and the second pressing protrusion 192 are formed to protrude downward by a predetermined length, but the protruding lengths are different to form a step g.

[0076] See also Fig. 9 and Fig.10, a pair of contact guide members 190 are connected to the inner surface of the housing 140 at the position where the lead electrodes 160 and 170 are inserted, and when the bracket 150 is combined with the housing 140 for assembly, the first pressing protrusion 191 and the second pressing protrusion 192 press the first lead electrode 160 and the second lead electrode 170 respectively, so that the first contact terminal 161 and the second contact terminal 171 are in contact with the first electrode pad 121 and the second electrode pad 131. At this time, since the first pressing protrusion 191 and the second pressing protrusion 192 have elasticity, the predetermined contact resistance (contact force) between the first contact terminal 161 and the second contact terminal 171 and the first electrode pad 121 and the second electrode pad 131 is maintained at a predetermined value.

[0077] In addition, since the first pressing protrusion 191 and the second pressing protrusion 192 have steps g with different end heights, the positions of the first lead electrode 160 and the second lead electrode 170 are offset from each other relative to the horizontal direction, corresponding to the step g. Therefore, since the first lead electrode 160 and the second lead electrode 170 are not located on the same horizontal line, electrical interference that may occur therebetween can be minimized. At this time, the first contact terminal 161 and the second contact terminal 171 are formed with different protrusion lengths, and by compensating the positions of the first lead electrode 160 and the second lead electrode 170, they can contact the first electrode pad 121 and the second electrode pad 131.

[0078] Although the exemplary embodiments of the present invention have been illustrated and described above, various modifications and other embodiments are obvious to those skilled in the art. These modifications and other embodiments should be considered and included in the appended claims without departing from the true spirit and scope of the present invention.

Claims

1. A heating device for managing a dishwasher and a washing machine, as a device installed in a water storage space in a dishwasher and a washing machine for heating water, wherein: include: a heating plate having a predetermined thickness and forming a heating surface on an outer surface; a heating electrode layer formed on an inner surface of the heating plate on an opposite side of the heating surface, with a pair of first electrode pads disposed on one side; A housing, fixing the heating plate at the lower opening so that the heating surface is exposed; a bracket, connected while sealing the side opening of the housing; A pair of first lead electrodes, one end of which has a first contact terminal and the other end of which has a first lead terminal, and which penetrates the bracket and is integrally connected to the bracket; as well as A pair of contact guide members includes a first pressing protrusion and is connected to the inner surface of the housing, wherein the first pressing protrusion presses the first lead electrode so that the first contact terminal contacts the first electrode pad.

2. The heating device for managing a dishwasher and a washing machine according to claim 1, wherein: Also includes: a resistive electrode layer formed on an inner surface of the heating plate in a region not overlapping the heating electrode layer, while providing a pair of second electrode pads on one side; as well as A pair of second lead electrodes, one end of which has a second contact terminal and the other end of which has a second lead terminal, passes through the bracket and is integrally connected to the bracket, The contact guide member further comprises: The second pressing protrusion is used to press the second lead electrode to make the second contact terminal contact with the second electrode pad.

3. The heating device for managing a dishwasher and a washing machine according to claim 1 or 2, wherein: The contact guide member is made of an elastic material to maintain a predetermined contact force between the first contact terminal (or the second contact terminal) and the first electrode pad (or the second electrode pad).

4. The heating device for managing a dishwasher and a washing machine according to claim 1, wherein: Also included is a water level detection sensor integrally connected to the bracket so that one end is exposed to the housing; The water level detection sensor is configured to heat water when the water level detection sensor detects that the water is filled.

5. The heating device for managing a dishwasher and a washing machine according to claim 4, wherein: The housing forms a water channel isolated from the outside by a partition wall having a through hole for water to flow in or out. The water level detection sensor is installed with one end exposed in the water channel and is used to detect the water level of water flowing into the water channel.

6. The heating device for managing a dishwasher and a washing machine according to claim 1, wherein: The heating surface is formed by bending the central area of ​​the heating plate so that it is concave inwardly.

7. The heating device for managing a dishwasher and a washing machine according to claim 6, wherein: The heating surface is in an inclined structure with different bending depths.

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