KR102066357B1 - Directly and Indirectly Heated Water Heater Using PTC Heater - Google Patents

Abstract

Disclosed are a direct and indirect electric water heater using a PTC heater. The disclosed direct and indirect electric water heater using a PTC heater directly heats water directly supplied from a water pipe and water stored in a hot water tank by a PTC heater heating unit, allows a user to use hot water for a long time at any time through an indirect heating method of heat-exchanging the direct water directly heated by the PTC heater heating unit to be heated once more by the preheated stored water, and eliminates the waste of water that is wasted by waiting until the discharge of existing hot water.

Description

Directly and Indirectly Heated Water Heater Using PTC Heater}

The present invention relates to a direct or indirect heated electric water heater using a PTC heater that can be easily used in an ordinary home as well as an office or a factory.

In particular, the direct water supplied from the water pipe and the stored water pre-stored in the hot water tank are directly heated by the PTC heater heating unit, and the direct water directly heated by the PTC heater heating unit is heat-exchanged once more by the preheated storage water. The present invention relates to a direct or indirect heating electric water heater using a PTC heater, which allows hot water to be used for a long time at any time by an indirect heating method.

Generally, electric water heaters are classified into storage water heaters used by heating and storing water in a water tank and instantaneous water heaters used by directly heating water. An example of the former storage water heater is Patent Document 1 To Patent Document 3.

Patent Literature 1 relates to an electric boiler, comprising: a storage tank configured to flow in and return heating water after heating, an electric heater to heat the heating water in the storage tank, and a coil form along the length of the outside of the electric heater. To heat the water from the primary warmed storage tank and pass it through the electric heater, and to cover the coil portion of the secondary heating line and the electric heater to heat the heat from the electric heater. It is disclosed that it consists of a metal cover body for conducting the heating water in the storage tank and the coil portion of the secondary heating line, and a circulation pump installed in the middle of the secondary heating line to circulate the heating water in the storage tank. There is,

Patent document 2 has a hot water outlet and a cooling water inlet connected to the heating tube at one side of the chamber of a relatively large water tank body, and a heat exchanger tube having a cold water inlet and a hot water outlet at the top, and an electric heater installed at the other side. However, the lower heater connects late-night electricity and the upper heater connects both late-night electricity and daytime electricity.The water in the vacancy is heated by night-time electricity and used as heat-exchanging with heating and living water in the state of mass storage. Is used in the case of a large amount of electricity used to heat the upper heater as a midnight electricity, and in the daytime when the midnight electricity cannot be used, the upper heater can be switched to the daytime electricity for heating to obtain daytime heating or high temperature living water. Is starting to

Patent Literature 3 discloses that the hot water discharged to the outside of the water tank generally has a constant temperature to be used while preventing cold water flowing into the water tank from being mixed with hot water discharged. The water tank is connected to the storage type electric water heater to be eliminated, the water tank is installed in the main body and connected to the inlet pipe provided in the inner lower portion and the discharge pipe provided in the inner upper portion, the inner surface of the main body and the outside of the water tank Thermal insulation material formed between foams, a heater installed in the front of the water tank, a safety valve installed on the inlet pipe, and a temperature sensor installed therein at the front of the water tank. And an overheat prevention device installed at the front of the water tank and connected to the temperature sensor, and installed at the front of the main body. : Stored in the electric water heater comprising a Tojo season, water guide portion that is provided on the upper end of the inlet pipe, which leads to the cold water introduced into the water tank from the inlet tube to the inside bottom of the water tank and; It is disclosed that the hot water induction unit is installed on the top of the discharge pipe, and guides only the hot water at a constant height from the inner upper portion of the water tank to the discharge pipe.

However, in the case of the prior art as described above, it is necessary to store a large amount of water due to a slow heating rate compared to the amount of water supply, and thus, the tank needs to be enlarged, and there is also an economic difficulty in producing a high-strength metal material as the volume increases. In addition, there is a disadvantage in that the life is shortened by the corrosion of the heater due to the direct heating method of heating the water directly by putting the heater in the water.

Therefore, there is an urgent need for the development of an electric water heater that can reduce the volume of the hot water tank and eliminate the lack of hot water at any time.

KR Patent Publication No. 10-2010-0062318 KR Patent Publication No. 1999-024191 KR Patent Registration No. 10-1462394

The present invention was developed to supplement the above-mentioned problems of the prior art and to provide various additional advantages, by directly heating the water directly supplied from the water pipe and the pre-stored water stored in the hot water tank by the PTC heater heating unit, 2 By the indirect heating method that heat-exchanges the heated direct water to be heated once again by the heated storage water, it is convenient to use hot water anytime for a long time, and there is no waste of water which throws out the discharge of hot water. An object of the present invention is to provide a direct or indirect heating electric water heater using a PTC heater that has economical efficiency.

It is another object of the present invention to provide a direct or indirect heating electric water heater using a PTC heater that enables a hot water tank to be made of a non-metallic material such as plastic, thereby making it commercially available in large quantities.

The object is achieved by a direct or indirect heated electric water heater using a PTC heater provided according to the invention.

Direct or indirect heating electric water heater using a PTC heater provided according to an aspect of the present invention, the pipe having a predetermined length having a direct inlet connected directly to the water pipe and a hot water outlet for exposing to the outside of the hot water tank having a water storage room of a predetermined width. A state in which the hot water circulation pipe disposed in a form circulating inside and outside the hot water tank and the hot water circulation pipe are connected to the hot water circulation pipe from an adjacent position of the direct water inlet so that the water supplied through the direct water inlet can be supplied to the hot water tank. A water pipe part formed of a water supply pipe branched and connected to the hot water circulation pipe and installed in the water supply pipe to control water supply; A PTC heater heating unit installed in the water pipe unit; And controlling the PTC heater heating unit to be turned on or off according to a detection signal input that the stored water temperature stored in the hot water tank is lower than or equal to a reference value or a direct temperature detection signal input from the water inlet. Storage water temperature detection sensor for detecting the set temperature of the stored water stored in the water level set by the water level detection sensor and the water level detection sensor and the water supply temperature detection sensor installed in the water inlet And controlling the PTC heater heating unit to be turned on or off by signals detected from the storage water temperature detection sensor and the water supply temperature detection sensors, and controlling the water supply valve by a signal detected from the water level detection sensor. Controller to control the water level of the hot water tank Including heating control unit is configured to,
The PTC heater heating unit is installed in such a way as to surround a portion of the hot water circulation pipe positioned at the bottom of the hot water tank, and directly heats the water directly received from the water inlet and the storage water of the hot water tank. A pair of PTC heaters disposed on both sides of the heat sink to be provided with; A support casing for receiving and supporting the heat sink and the PTC heater to be provided as a secondary heat source for indirectly heating the water pipe portion indirectly; And a compartment fixed to the bottom side of the hot water tank while allowing the heat sink and the PTC heater and the support casing for supporting them to be accommodated in a closed space partitioned from the water storage compartment, so as to fix the support casing. Including the enclosure,
The hot water tank is formed of a plastic material having an upper portion, front and rear sides, and a left and right portion of the hot water tank, and the bottom portion is made of a metal plate having excellent thermal conductivity, such as the compartment enclosure. It is characterized in that the heat is quickly transferred to the storage water inside the tank.

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According to the present invention, by adopting the PTC heater heat generating unit that generates high heat due to the instantaneous increase in current flow, the direct water supplied from the water pipe and the stored water stored in the hot water tank in advance can be directly heated by the PTC heater heat radiating unit. By the indirect heating method in which the heated direct water is heat-exchanged so that it is heated once more by the heated storage water, the second hot water can be used at any time for a long time, and also the output of conventional hot water Waiting until the effect of eliminating the waste of water is discarded.

The present invention also allows the hot water tank to be made of a non-metallic material such as plastic, thereby giving the effect of supplying a large amount in safety.

1 is a view schematically showing the configuration of a direct or indirect heated electric water heater using a PTC heater according to the present invention,
FIG. 2 is a perspective view of the PTC heater heating unit 150 separated and shown in FIG. 1.
3 is an enlarged cross-sectional view taken along line II of FIG. 2.

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be described in detail.

However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In the following description of the present invention, if it is determined that the detailed description of the related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the terms to be described later are defined in consideration of functions in the present invention, which may vary according to the intention or custom of the user or operator, and the definitions should be made based on the contents throughout the present specification for describing the present invention. .

Hereinafter, a more preferred embodiment of a direct or indirect heated electric water heater using a PTC heater according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic view of the configuration of a direct or indirect heating electric water heater using a PTC heater according to the present invention, Figure 2 is a perspective view showing only the PTC heater heating unit 150 in Figure 1, Figure 3 is a line II of Figure 2 It is an expanded sectional view along a direction.

As shown in the drawings, the direct or indirect heating electric water heater 100 using the PTC heater according to the present invention includes a substantially rectangular hot water tank 110 closed on all sides.

The hot water tank 110 may be composed entirely of a metal plate, but in order to reduce manufacturing costs and achieve light weight, the top, front, and left and right sides of the hot water tank 110 are formed of a high strength plastic plate, and only the bottom is opened. It can be comprised with a metal plate body excellent in conductivity.

As shown in the drawing, the hot water tank 110 is provided with a water pipe part 130. The water pipe part 130 forms a direct water inlet 131-1 and a hot water outlet 131-3, and circulates the circulation pipe 131 and the direct water through the inside and the outside of the hot water tank 110. A water supply pipe 133 connected to the circulation pipe 131 from a position adjacent to the inlet 131-1 and branched to penetrate the upper portion of the hot water tank 110 to be in contact with the water storage chamber 113. ).

The direct inlet 131-1 and the hot water outlet 131-3 are disposed to be exposed to the outside from the hot water tank 110, and the direct inlet 131-1 is directly connected to a water pipe (not shown). The hot water outlet 131-3 is installed to be exposed to the predetermined length from the hot water tank 110, and then installs a hot water faucet 135 so that anyone can withdraw water according to the opening and closing of the hot water faucet 135. The opening and closing action of the water supply valve 137 installed in the water supply pipe 133 supplements or stops the water supply to the inside of the hot water tank 110.

As shown in the drawing, the PTC heater heating unit 150 is installed in a form surrounding the portion located on the inner bottom side of the water pipe part 130, that is, as shown in FIG. The cold tap water received from the inlet 131-1 and the storage water stored in the water storage compartment 113 of the hot water tank 110 may be directly directly heated, and also preheated in the water storage compartment 113. The heat generated from the stored water in a state serves as an indirect heat source for heat-exchanging heat to the second circulation pipe 131 circulating through the water storage chamber 113.

The PTC heater heating unit 150 having a first and second heat source functions surrounds a portion of the circulation pipe 131 located at the bottom of the inside of the hot water tank 110 in the circulation pipe 131. A pair of PTC heaters 151a and 151b disposed on both sides of the heat dissipation plates 153a and 153b installed in a shape to provide heat for directly heating the direct flow flowing through the circulation pipe 131, and the circulation pipe ( The heat sinks 153a and 153b and the PTC heaters 151a and 151b are housed in the storage chamber 155 so that the heat sinks 153a and 153b and the PTC heaters 151a and 151b are not separated from the 131. The space part 158 is formed in the support casing 157 and the bottom of the hot water tank 110 by forming a closed space part 158 partitioned from the water storage chamber 113 of the hot water tank 110. A support casing 157 for accommodating and supporting the heat sinks 153a and 153b and the PTC heaters 151a and 151b to the water. While typically receive no contact search consists of a compartment housing 159 which is fixed to an inner bottom portion of the hot water tank 110, and the support casing (157) is fixed reliably in the upper part of the compartment housing (159).

As shown in FIG. 1, the compartment 159 is formed of a rectangular cylinder in which only a bottom part is opened and four sides are closed to form a state in which the PTC heater heat generating part 150 is hermetically surrounded. It is fixed to the bottom side of the tank 110 to fix the heater support casing 157 and the heat generated from the PTC heater heat generating unit 150 is a closed space portion of the compartment 159 It is stored in 158 and serves as a heat radiation to heat the storage water of the hot water tank (110). For this reason, when the hot water tank 110 is made of plastic, the compartment 159 is preferably made of a metal material having excellent thermal conductivity.

As shown in the drawing, the heat generation control unit 170, the water level detection sensor 171 for detecting the water level of the storage water of the hot water tank 110 and the water level detection sensor 171 of the hot water tank 110 Storage water temperature detection sensor 173 for detecting that the temperature of the stored water stored at the internally set water level falls below the set value and the water supply temperature detection sensor installed in the vicinity of the water inlet 131-1 to detect the water supply temperature The PTC heater heating unit 150 is controlled to be turned on or off according to a signal detected from the 175 and the storage water temperature detection sensor 173 and the water supply temperature detection sensor 175, and the water level detection is performed. The controller 177 is configured to control the opening and closing of the on-off valve 137 to adjust the water level of the storage water of the hot water tank 110 by the signal detected from the sensor 171.

In the above embodiment, the reference numeral 115 denotes an over-discharge port for withdrawing the stored water that is over when the storage water stored in the hot water tank 110 is over.

According to the present invention having such a configuration, the water supply to the water storage chamber 113 side of the hot water tank 110 can be performed through the water supply pipe 133 from the circulation pipe 131 directly connected to a water pipe (not shown). The water level control of the water storage chamber 113 of the hot water tank 110 is automatically performed by turning on or off the water supply valve 137 of the controller 177 by the water level detection signal detected by the water level sensor 171. Is adjusted.

When the water supply is completed in the water storage chamber 113 of the hot water tank 110, the cold water passes through the direct inlet 131-1 of the circulation pipe 131, the water supply temperature detection sensor ( From 175, the temperature of cold tap water is detected.

At this time, the direct temperature detection signal is immediately input to the controller 177 of the heat generating control unit 170. In this case, the controller 177 supplies power applied to the PTC heaters 151a and 151b side of the PTC heater heating unit 150. By controlling the current to increase the instantaneously to the PTC heater (151a, 151b) to enable the hot water even for a long time to quickly heat the water flowing through the circulation pipe 131 via the PTC heater heating unit 150. . As the characteristics of the PTC heaters 151a and 151b are well known, current flows a lot when the ambient temperature of the PTC heaters 151a and 151b decreases, and a current flows small when the temperature increases. In this case, the characteristics of the PTC heaters 151a and 151b are used.

The high heat generated from the PTC heater heating unit 150 heats the direct water passing through the circulation pipe 131 of the PTC heater heating unit 150 to 80 ° C. The hot water heated to 80 ° C. via the PTC heater heating unit 150 enables the user to immediately use hot water even for a long time depending on whether the hot water faucet 135 of the hot water outlet 131-3 is opened. The heat generation control of the PTC heater heating unit 150 by the heat generating control unit 170 is continuously executed while the direct water (tap water) is supplied through the direct inlet 131-1, and the direct water is controlled to a predetermined temperature (80 ° C.). It is heated to make hot water.

The heat generated by the PTC heater heating unit 150 that heats the water passing through the circulation pipe 131, that is, the PTC heater heating unit in the space 158 in which the four sides of the compartment 159 is closed. Heat radiated from the PTC heaters 151a and 151b and the aluminum heat sinks 153a and 153b of the 150 and the compartment box 159 heated by the high temperature heat radiated from the aluminum heat sinks 153a and 153b is transferred to the water reservoir. The storage water of 113 is directly heated to form hot water of 50 to 80 ° C., and the storage water of the heated water storage room 113 is heated to the second water once again passing through the circulation pipe 131. There is an advantage in that the indirect heating action of the heat exchange type to heat the primary heated water via the circulation pipe 131 again once again to enable the use of hot water even for a long time.

The storage water temperature of the water storage chamber 113 is maintained at 50 to 80 ° C. For example, when the storage water temperature falls below 50 ° C., the signal detected by the storage water temperature detection sensor 173 is the heat generation control unit ( 170 is quickly input to the controller 177, the controller 177 to immediately operate the PTC heater heating unit 150 to heat the storage water of the hot water tank 110 by heating the storage water temperature 50 It was possible to maintain at ~ 80 ℃.

On the contrary, when it is detected that the storage water temperature of the water storage chamber 113 exceeds 80 ° C. from the temperature detection sensor 173, the detection signal at this time is also immediately input to the PTC heater heating unit 150. The operation of the PTC heater heating unit 150 is controlled to turn off the heat generation of the PTC heater heating unit 150.

This control method is a general method pre-programmed in the controller 177 of the heat generating control unit 170, the circulation pipe 131 so that the temperature of the storage water in the water storage chamber 113 is always maintained at 50 ~ 80 ℃. There is an advantage in that it is possible to use as a heating source for heating the water directly via the secondary, which allows immediate use of hot water for a long time.

100: direct or indirect heating electric water heater using PTC heater
110: hot water tank
112: water reservoir
130: water pipe
131: hot water circulation pipe
131-1: Direct inlet
131-3: Hot water outlet
133: water supply pipe
137: water supply valve
150: PTC heater heating unit
151a, 151b: PTC Heater
153a, 153b: heat sink
157: support casing
158: space part
159: compartment
170: heat generating control unit
171: water level detection sensor
173: Storage water temperature sensor
175: water supply temperature sensor
177: controller

Claims (5)

The hot water circulation pipe and the direct water which have a predetermined length of a pipe having a direct water inlet directly connected to the water pipe and a hot water outlet for exposing the water reservoir having a predetermined width to the outside of the hot water tank in a circulating manner inside and outside the hot water tank. The water supply pipe installed in the water supply pipe and the water supply pipe connected directly to the hot water circulation pipe are branched to form a state in contact with the hot water circulation pipe from an adjacent position of the direct water intake port so that water supplied through the water inlet can be supplied to the hot water tank. A water pipe part composed of a water supply valve for controlling;
A PTC heater heating unit installed in the water pipe unit; And
Detecting the water level of the hot water tank to control the PTC heater heating unit on or off in accordance with a detection signal input that the stored water temperature stored in the hot water tank is below or above the reference value or the temperature detection signal input from the water inlet A storage water temperature sensor for detecting a set point temperature of the storage water stored at the level set by the water level detection sensor and the water level detection sensor, and a water supply temperature detection sensor installed at the water inlet; By controlling the PTC heater heating unit in the on or off state by the signal detected from the storage water temperature sensor and the water supply temperature detection sensors, the water supply valve is controlled by a signal detected from the water level detection sensor With a controller to control the water level of the hot water tank Generated includes a heating control unit,
The PTC heater heating unit is installed in such a way as to surround a portion of the hot water circulation pipe positioned at the bottom of the hot water tank, and directly heats the water directly received from the water inlet and the storage water of the hot water tank. A pair of PTC heaters disposed on both sides of the heat sink to be provided;
A support casing for receiving and supporting the heat sink and the PTC heater to be provided as a secondary heat source for indirectly heating the water pipe portion indirectly; And
Compartment enclosure for holding the heat sink and the PTC heater and the support casing for holding them in the closed space partitioned from the water storage compartment to be fixed to the bottom side of the hot water tank to fix the support casing Including;
The hot water tank is formed of a plastic material having an upper portion, front and rear sides, and a left and right portion of the hot water tank, and the bottom portion is made of a metal plate having excellent thermal conductivity, such as the compartment enclosure. Direct and indirect heating electric water heater using a PTC heater, characterized in that the heat is quickly transferred to the storage water inside the tank.

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