KR102622228B1 - A heater for heating water that a temperature control switch and a fuse are installed in a stainless steel tube - Google Patents

Abstract

This specification discloses a hot water heater in which a temperature control switch and a fuse are mounted inside a stainless steel tube. The hot water heater according to an embodiment of the present invention is assembled with the upper case 111 and the upper case 111 in which the lamp indicating whether the heater is operating is assembled, and the heater pipe 120 and the stainless steel tube 130 are mounted. It includes a plastic case portion 110 consisting of a lower case 112, wherein the lower case 112 has a through hole formed for mounting the stainless steel tube 130, and the stainless steel tube 130 has a through hole inside the stainless steel tube 130. A temperature control switch 190 and a fuse 180 connected in series to the power supply wiring inside the plastic case portion 110 are disposed.

Description

A heater for heating water that a temperature control switch and a fuse are installed in a stainless steel tube}

The present invention relates to a hot water heater, and more specifically, to a hot water heater in which a temperature control switch and a fuse are mounted inside a stainless steel tube.

A hot water heater is a device used to create a relatively small amount of hot water in places without hot water facilities such as boilers, and is useful in construction sites, camping sites, restaurants, and homes.

In conventional hot water heater products, the temperature control switch is assembled inside the upper and lower cases, so the upper and lower case sizes are inevitably large, and the contact area when assembling the upper and lower cases is large, so even though they are designed to be waterproof, they are actually deformed due to the nature of the plastic. There is a high probability of flooding in the contact area due to adhesion, unevenness, etc.

In particular, in existing products, the temperature control shaft of the temperature control switch and the temperature control handle (knob) are assembled across the upper part of the upper case, so a shaft through hole is inevitably created in the upper part of the upper case, and this area is where the temperature control knob is located. Although it is covered, it is exposed to flooding because it is a structure with gaps.

According to the prior art used in hot water heaters (see Patent Registration No. 10-1274646), a fuse is inserted between the terminal block and the heating coil that constitutes the sheath heater, so that when the heater overheats, the power is cut off by the operation of the fuse for safety. However, this idea cannot be applied in reality because the fuse is compressed during the essential process of removing the air inside the heater to maintain the life of the sheath heater, that is, the rolling pressing process.

Unlike the above heat-sensing safety device, another prior art (see Patent Registration No. 10-2394336) uses water as a conductive medium by passing a micro-current through a water-sensing device, that is, a stainless steel rod separate from the stainless steel heater rod, so that when water is present, A technology is adopted to promote safety by detecting microcurrents to energize the heater and shutting off the heater electricity when there is no water.

However, this technology also has three fatal flaws. First, there is a problem that if limestone or foreign substances adhere to the stainless steel rod that is separate from the heater surface during use, microcurrent does not flow and the heater does not work even if placed in water. Second, if the stainless steel rod, which is separate from the surface of the sheath heater used as a microcurrent terminal block, is connected to a conductor such as metal, the heater generates heat even when not immersed in water, which poses a risk of fire. Third, in pure water such as purified water or distilled water, there is a problem in which the heater itself does not operate because microcurrent does not flow in the water at all.

To overcome this problem, there is a technology (see Patent Registration No. 10-1580055) that operates by separately sensing the resistance values of conductors and water, but its accuracy is low depending on the usage environment, so it failed to be commercialized due to malfunction issues and compared to its functionality. Due to high manufacturing costs and many problems with repairs, only products that simply sense the water level using water as a conductor are being released.

Typically, conventional technologies or existing products for the same purpose have large upper and lower case sizes because the temperature control switch is assembled inside the upper case and lower case.

In a conventional temperature control switch, the electrical and temperature control units are installed inside the upper and lower cases, and the sensing unit that detects temperature is installed underwater. In particular, in the process from temperature sensing to switching, the principle operates by changes in gas pressure inside the long capillary, and if the long and thin capillary is folded or bent, temperature sensing may slow down or malfunction.

The present invention is an invention conceived to solve the problems of the prior art described above, and is capable of reducing costs and improving the waterproof structure, while completely preventing safety accidents due to heater overheating and providing hot water without the risk of damage to the temperature sensor due to heater overheating. The main purpose is to provide a heater.

Accordingly, the present invention consists of an upper case 111 in which a lamp indicating whether the heater is operating is assembled, and a lower case 112 assembled with the upper case 111 and on which a heater pipe 120 and a stainless steel tube 130 are mounted. It includes a plastic case portion 110, and a through hole for mounting the stainless steel tube 130 is formed in the lower case 112, and the plastic case portion ( 110) A hot water heater 100 is provided with a temperature control switch 190 and a fuse 180 connected in series to the internal power supply wiring.

In the hot water heater 100, the stainless steel tube 130 is arranged in parallel with the heater pipe 120 and is in close contact with or adjacent to one linear part of the heater pipe 120, and the temperature control switch 190 is It may be disposed above the heating portion (H) of the heater pipe 120 and adjacent to the heating portion (H).

The hot water heater 100 is not equipped with a mechanical or electronic component for controlling the target temperature in the plastic case portion 110, and when the hot water heater is used, the temperature is controlled according to an increase in the temperature around the temperature control switch 190. The power may be automatically cut off according to the switching operation of the switch 190.

The hot water heater 100 may have the temperature control switch 190 as a bimetal switch.

1 to 3 are diagrams showing a hot water heater 100 according to the present invention.
Figure 4 is a partially disassembled view of the hot water heater 100.
Figure 5 is an enlarged view of the lower part of Figure 4.
Figure 6 is a view showing the inside of the heater pipe 120 and the stainless steel tube 130.
Figure 7 is an enlarged view of the lower part of Figure 6.
Figure 8 is a diagram showing the electric circuit of the hot water heater 100.
Figures 9 and 10 show examples of use of the hot water heater 100.
10 and 11 show examples of undesirable arrangement structures of the temperature control switch 190.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

1 to 3 are views showing the hot water heater 100 according to the present invention, FIG. 4 is a view showing the hot water heater 100 partially disassembled, and FIG. 5 is an enlarged view of the lower part of FIG. 4.

The hot water heater 100 of the present invention shown here is used to easily obtain hot water in places without boilers, such as construction sites, camping sites, and restaurants.

The hot water heater 100 of the present invention includes a plastic case portion 110, a heater pipe 120, a stainless steel tube 130, and a pair of protective covers 140 and 150.

The plastic case 100 consists of an upper case 111 and a lower case 112 that are assembled together, and a power cord (not shown) for connecting a power source is assembled between the upper case 111 and the lower case 112. .

The upper case 111 is equipped with a lamp 160 that indicates whether the heater is operating. A heater pipe 120 and a stainless steel tube 130 are respectively mounted on the lower case 112 through through holes. Wires for electrical wiring are stored in the plastic case 110, and the power required for the electrical operation of the hot water heater 100 is transmitted to related components.

A pair of protective covers 140 and 150 covers the heating part located at the bottom of the heater pipe 120, thereby preventing the heating part and the water tank (container) from directly contacting each other. As a result, it is possible to prevent fire safety accidents that occur when the heating part of the hot water heater 100 touches the water tank.

FIG. 6 is a view showing the inside of the heater pipe 120 and the stainless steel tube 130, FIG. 7 is an enlarged view of the lower part of FIG. 6, and FIG. 8 is a view showing the electric circuit of the hot water heater 100. .

A heating coil 170 is accommodated inside the heater pipe 120. The heating coil 170 is a component that generates Joule's heat for heating water and is disposed at the lower part of the heater pipe 120. Referring to FIG. 7, the portion of the heater pipe 120 that accommodates the heating coil 170 constitutes the heating portion (H) of the hot water heater 100, and water is emitted by the heat emitted from the heating portion (H). This heating produces hot water. Additionally, a wire 171 that electrically connects the heating coil 170 to the electrical wiring in the case portion 110 is accommodated in the heater pipe 120.

A fuse 180 and a temperature control switch 190 are accommodated inside the stainless steel tube 130. The fuse 180 serves to cut off the power by short-circuiting when overcurrent is applied or when the heater overheats. The temperature control switch 190 detects when the temperature of the water heated through the hot water heater 100 reaches the set temperature (e.g. 60 ℃, 100 ℃, etc.) and switches to the OFF state when the target water temperature is reached. It serves to cut off the power. In addition, the temperature control switch 190 serves to prevent safety accidents due to overheating of the heater by turning off the power when the hot water heater 100 is used when there is no water in the water tank or the amount of water filled in the water tank is too small. A bimetal switch can be suitably used as the temperature control switch 190.

Referring to the electric circuit shown in FIG. 8, the above-described electrical components, namely the lamp 160, the heating coil 170, the fuse 180, and the temperature control switch 190, are connected in series to the power source.

The temperature control switch 190 is designed to operate by switching from ON to OFF at a specific preset temperature. Therefore, when generating hot water using the hot water heater 100 of the present invention, water can be heated only up to the switching operating temperature of the temperature control switch 190, and when the water temperature reaches the switching operating temperature, the temperature control switch 190 detects this and switches on to automatically turn off the power. In other words, when using the hot water heater 100, the switching operating temperature of the temperature control switch 190 becomes the target temperature, and the power is controlled to be cut off by the switching operation of the temperature control switch 190 when the target temperature is reached. When commercializing the hot water heater 100 according to the present invention, a temperature control switch 190 with a switching operating temperature (target temperature) that matches the product specifications can be appropriately selected and applied (e.g., an operating temperature designed at 60°C). Temperature control switch, temperature control switch designed for an operating temperature of 100℃).

According to the present invention, a temperature control switch 190 is provided in addition to the fuse 180, so a double safety function against heater overheating is implemented. Therefore, safety accidents due to heater overheating can be completely prevented.

Figures 9 and 10 show examples of use of the hot water heater 100.

As shown in FIG. 9, when the heating part (H) of the hot water heater 100 is sufficiently immersed in water, the temperature control switch 190 performs a switching operation when the water temperature reaches the target temperature (e.g., 60°C). Power is cut off.

As shown in FIG. 10, when the amount of water in the water tank is insufficient, a part of the heating part (H) is exposed, and at this time, the heat emitted from the exposed heating part (H) is transferred to the temperature control switch 190 using air as a medium. As the temperature is transmitted to the target temperature, the temperature control switch 190 performs a switching operation and the power is cut off even before the water temperature reaches the target temperature. In this way, if the hot water heater 100 is used without the entire heating part (H) submerged in water, safety accidents such as fire due to heater overheating may occur. According to the present invention, the temperature control switch 190 Exposure to the heating part (H) is detected and the power is turned off in an emergency, preventing such safety accidents from occurring.

As shown in FIG. 10, the temperature control switch 190 is placed above the heating unit (H) and adjacent to (close to) the heating unit 190.

If the temperature control switch 190 is placed too far away from the heating unit (H), a problem may occur in which the temperature control switch 190 cannot sensitively detect exposure of the heating unit (H) to the air.

As illustrated in FIG. 11 or FIG. 12 , when the temperature control switch 190 is disposed inside the heating unit (H) compared to the case of FIG. 10, the heat generated is transmitted to the temperature control switch 190 using air as a medium. The temperature control switch 190 may be damaged or malfunctioned due to the hot heat emitted from the unit H. That is, in the position illustrated in FIG. 11 or FIG. 12, the air around the temperature control switch 190 rises to a very high temperature (e.g., 300 to 400 ° C.) due to the heat emitted from the exposed heating portion (H), and the temperature As a result of being transmitted to the temperature control switch 190, a problem occurs in which the temperature control switch 190 is damaged or breaks down due to overheating.

The advantages and advantages of the hot water heater 100 of the present invention described above are summarized and explained as follows.

First, it shows significant improvement in terms of waterproof structure compared to prior technologies.

In products according to the prior art, the temperature control switch is assembled inside the plastic case, so the size of the plastic case is inevitably large, and the contact area when assembling the upper and lower cases is large, so even though it is designed to be waterproof, the contact surface area is damaged due to deformation and uneven adhesion due to the nature of the plastic. There is a high probability of flooding. In particular, in existing products, the temperature control shaft of the temperature control switch and the temperature control handle (knob) are assembled across the upper part of the upper case, so a shaft through hole is inevitably created in the upper part of the upper case, and this part is used to control the temperature control knob. Although it is covered, it is exposed to flooding because it is a structure with gaps.

In the present invention, in order to solve this problem, the location of the temperature control switch 190 is changed from inside the plastic case portion 110 to the inside of the stainless steel tube 130, thereby dramatically reducing the size of the plastic case portion 110 compared to prior technologies. Because it has become smaller, the adhesion surface for the upper and lower case assembly is also proportionally reduced, and the adhesion is relatively improved compared to existing products even with normal pressing force, reducing the probability of flooding. In addition, since the temperature control switch 190 is not accommodated in the plastic case portion 110 but rather in the stainless steel tube 130, there is no need to provide a knob shaft through hole in the upper case 111, thereby eliminating the waterproofing that occurs in existing products. The problem is dramatically improved.

Second, it exhibits a significant improvement in safety functions compared to prior technologies.

The hot water heater 100 of the present invention applies a fuse 180 and a temperature control switch 190 as a double safety device against heater overheating within the stainless steel tube 130, so that the safety accident problem due to heater overheating is addressed by prior art. You can prepare more completely than before.

Third, compared to prior technologies, it demonstrates significant improvement in terms of cost reduction and temperature control accuracy.

In the present invention, the temperature control switch 190 is not placed inside the plastic case 110, but is located inside the stainless steel tube 130, thereby eliminating the need for a temperature control knob and reducing the size of the upper and lower cases, thereby significantly reducing product costs. . In addition, conventional technologies adopt a type of temperature control switch that allows the user to arbitrarily adjust the target temperature in the range of 30 to 100 ℃, but in general, the temperature once set is rarely changed, like the temperature of a home refrigerator. Likewise, taking into account the fact that the hot water heater rarely changes once the user sets the target temperature, the present invention adopts a single target temperature control switch 190. Although it can be mounted inside the plastic case 110, the temperature control switch ( 190) is installed in the stainless steel tube 130 so that it can operate safely by directly entering the water, thereby controlling the temperature of the water faster and more accurately than conventional products.

100: hot water heater
110: Plastic case part
111: upper case
112: lower case
120: heater pipe
130: stainless steel tube
140, 150: Protective cover
160: lamp
170: Heating coil
180: fuse
190: temperature control switch

Claims (4)

A plastic case portion consisting of an upper case 111 where a lamp indicating whether the heater is operating is assembled, and a lower case 112 which is assembled with the upper case 111 and on which a heater pipe 120 and a stainless steel tube 130 are mounted ( 110), and a through hole for mounting the stainless steel tube 130 is formed in the lower case 112, and inside the plastic case portion 110 through the through hole in the stainless steel tube 130. A temperature control switch 190 and a fuse 180 connected in series to the power supply wiring are disposed, and the temperature control switch 190 is disposed above the heating portion (H) of the heater pipe 120. ), and the plastic case portion 110 is not provided with any mechanical or electronic components for controlling the target temperature and only contains wires for power supply, and when using the hot water heater, the temperature control switch 190 ) The power is automatically cut off according to the switching operation of the temperature control switch 190 as the surrounding temperature rises, and the temperature control switch 190 switches from ON to OFF at a preset operating temperature. When the heating unit (H) is immersed in water and the water temperature reaches the operating temperature, the temperature control switch 190 switches to the off state and the power is cut off, and the entire heating unit (H) is immersed in water. A hot water heater in which, when the heater is used without being locked, the heat emitted from the exposed heating part (H) is transferred to the temperature control switch (190) and the temperature control switch (190) is switched to the off state, thereby cutting off the power.
In claim 1,
A hot water heater in which the stainless steel tube (130) is arranged in parallel with the heater pipe (120) and in close contact with or adjacent to one linear portion of the heater pipe (120).
delete In claim 1,
A hot water heater in which the temperature control switch 190 is provided as a bimetal switch.