CN2591499Y - Instant heating thermosensitive ceramic electric water heater - Google Patents

Abstract

The utility model relates to an instant heating thermosensitive ceramic electric water heater, which comprises a water pipe body and an electric heating element, wherein, the water pipe body is provided with a water inlet and a water outlet. The electric heating element comprises a thermosensitive ceramic element, wherein, both sides of which are provided with parallel sheet metals, the outer side of two parallel sheet metals are respectively provided with a heat conduction insulation ceramic sheet, the electric heating element is arranged in the water pipe body, and the thermosensitive ceramic element is connected with a leading wire which is communicated with the outer side of the water pipe body. The leading wire is not only connected with terminals of the parallel sheet metals, but also connected with a thermal protector in series to be a power supply line which is inserted in a power supply. The utility model relates to the instant heating thermosensitive ceramic electric water heater, which can heats water which flows through the electric water heater. The utility model has the advantages of self temperature control, instant heating, high heating efficiency, high safety, small size, convenient installation and use, etc. The utility model is mainly used for shower bath, providing washing hot water and various occasions required liquid heating. The utility model adopts a novel PTC thermosensitive ceramic as a heating element, which enables a heater to heat instantly, and the utility model can generate the hot water in a short time. Since a water circuit and an electric circuit are separated, the structure does not need so-called channel area and non heating zone, and the utility model has convenient design and safe performance.

Description

Instant thermal ceramic electric water heater

technical field

The utility model relates to an electric water heater, in particular to an instant electric water heater made of thermosensitive ceramics (PTC).

Background technique

Existing electric water heaters are divided into storage type electric water heaters and instantaneous electric water heaters. The biggest feature of the storage type electric water heater is that it can store heat. It can use the electric energy at night to heat slowly. Its electric power is designed to be small, but its volume is large and its thermal efficiency is not high.

Instantaneous electric water heaters generally use electric heating wires as heating elements, and their heating elements are divided into bare electric heating elements and embedded electric heating elements according to their structure. At present, embedded electric heating elements are mostly used as heating elements. In the instant water heater using bare electric heating elements, the current flows through the heating element that is not insulated from water and is directly immersed in water. It has the characteristics of small thermal inertia, rapid heating, and can provide hot water in a short time after opening the water valve. . The fast water heater with built-in electric heating element is generally a tubular electric heating element. Tube is formed, and the heating wire is insulated from water, which has the characteristics of safety and firm structure.

The above two electric heating element structures have been widely used in instant electric water heaters, but they have the following disadvantages at the same time:

1. Since it is an ordinary electric heating element without temperature self-control function, empty heating is not allowed. In the case of air pockets in the water, it is easy to cause dehydration of the electric heating wire, and the electric heating wire will be blown, resulting in damage to the heater. In addition, the easy burning of the electric heating tube is also a long-term problem.

2. For water heaters with built-in electric heating elements, after the electric heating wire is energized and heated, the heat passes through the magnesium oxide insulating layer, and then passes through the stainless steel tube to the water. Due to the certain thermal resistance between magnesium oxide and stainless steel, the heat transfer is slow , affecting the heating rate.

3. For water heaters using naked heating elements, the water circuit and circuit are not separated. When the water heater is working, most of the current passes through the heating wire to generate heat. Since water is not an insulator, water has a certain distribution resistance, so there is a certain amount of resistance in the water. distribution current. When the water flows, the current in the water will be taken out to form electricity leakage, so generally a catch grid made of metal mesh is installed on the cross-section of the water heater outlet, but after long-term use, scale or other sundries will be absorbed On the surface of the metal net, it is easy to make the grid failure like this, and its reliability is relatively poor, and there is a potential safety hazard in use.

4. The use of instant electric water heaters has certain limitations in structural design. In order to reduce the length of the air pocket, there must be a certain channel area in the structure. In order to prevent leakage current, there must be enough non-heating area. Therefore, its volume is relatively large, installation is inconvenient, and thermal efficiency is not high.

Contents of the invention

In order to overcome the above-mentioned shortcoming of the prior art, the task of the utility model is to provide a new instant thermal ceramic (PTC) electric water heater, which solves the problem that the electric heating element in the existing instant electric water heater is fragile, Larger volume, slow heating speed, low thermal efficiency and other problems.

The technical scheme of the utility model is as follows:

An instant heat-sensitive ceramic electric water heater, which includes a water pipe body with a water inlet and a water outlet and an electric heating body, the electric heating body includes a heat-sensitive ceramic element, and parallel metal plates installed on both sides of the heat-sensitive ceramic element sheet, and a heat-conducting and insulating ceramic sheet installed on the outside of the two parallel metal sheets, the electric heater is placed in the water pipe body, and the heat-sensitive ceramic element is connected with a lead wire leading to the water pipe body, which is connected to the terminal of the parallel metal sheet Connected, and connected in series with the thermal protector as a power cord to connect to the power supply.

The utility model is an instant heat-sensitive ceramic electric water heater that is rapidly heated when water flows through it. It has the advantages of automatic temperature control, rapid heating, high thermal efficiency, safety and reliability, small size, and convenient installation and use. Hot water for washing and various occasions that require liquid heating.

The utility model adopts a novel PTC thermosensitive ceramic as a heating element. The heat-sensitive ceramic element heats up quickly and can automatically maintain the temperature after reaching the Curie point. There is no need to install a constant temperature device during use, and it will not be damaged in the long-term empty-burning state. It will not be damaged either. Since the power of the heat-sensitive ceramic element depends on the heat dissipation conditions, the power will automatically increase when the water temperature is low or the flow rate is high, and the power will decrease correspondingly when the water temperature is high or the flow rate is small, so it has a certain function of automatic adjustment of water temperature. The heat-sensitive ceramic element has low resistance at normal temperature, and its impact power is relatively large at the moment of power-on, so the heater can be heated instantly, and hot water can be generated in the shortest time.

The surface temperature of the utility model in the working state is lower, which is close to the water temperature, and the designed volume is also smaller, so that the heat loss is minimized. Since the waterway and the circuit are separated, there is no need for the so-called channel area and non-heating area in the structure, which is more convenient in design and safer in performance.

Description of drawings

Fig. 1 is a schematic structural view of a unit of the instant heat-sensitive ceramic electric water heater of the present invention.

FIG. 2 is a sectional view according to FIG. 1 .

Fig. 3 is a structural schematic diagram of four units of the instant heat-sensitive ceramic electric water heater of the present invention.

FIG. 4 is a sectional view according to FIG. 3 .

Fig. 5 is a structural schematic diagram of the electric heating body of the instant heat-sensitive ceramic electric water heater of the present invention.

Detailed ways

Referring to Fig. 1 to Fig. 5, the utility model is an instant thermosensitive ceramic electric water heater, which includes a water pipe body 1 with a water inlet 11 and a water outlet 12 and an electric heating body 2. The electric heater 2 is equipped with a heat-sensitive ceramic element 21, and parallel metal sheets 22 are installed on both sides of the heat-sensitive ceramic element 21, and a heat-conducting insulating ceramic sheet 23 is respectively installed on the outer sides of the two parallel metal sheets 22, and the electric heater 2 is placed on the Inside the water pipe body 1. The heat-sensitive ceramic element 21 is connected with a lead wire leading to the outside of the water pipe body 1. The lead wire is not only connected to the terminal of the parallel metal sheet 22, but also connected in series with the thermal protector 3 as a power supply line. The water pipe body 1 and the electric heating body 2 are separated by a heat-conducting insulating ceramic sheet 23, and are encapsulated by high-temperature heat-resistant silica gel, so that the heat transfer is good and the heat generation is rapid.

Two parallel metal sheets 22 are arranged in parallel in the water pipe body 1 , and the heat-sensitive ceramic element 21 is arranged between the two parallel metal sheets 22 . The two parallel metal sheets 22 are all connected to the lead wire 24 through the terminal, and the lead wire 24 protrudes from a port of the water pipe body 1, and is connected to the power supply as a power line after being connected in series with the thermal protector 3 . The water pipe body 1 is made of aluminum alloy, and the lead-out end of the electric heating body 2 is encapsulated with sealing silica gel.

As shown in FIG. 2 and FIG. 4 , the water pipe body 1 is provided with fin-shaped cooling fins 13 which can increase the cooling area. In the design of the water circuit, the circuitous circulation method is adopted to make the water flow reciprocate in the heater, and at the same time let the water flow pass through the fin-shaped or porous radiator to divert the water flow, so that the heat can be fully transferred to the water, so that the heat dissipation condition can reach the best. It is good, and the maximum power output is achieved in a small volume, which fully embodies the characteristics of rapid heating of the instant heat-sensitive ceramic electric water heater of the present invention.

The water inlet 11 and the water outlet 12 of the water pipe body 1 are respectively equipped with a stainless steel hose interface 14, a high-temperature gasket 15 to prevent leakage and a metal grounding ring 16, and the metal grounding ring 16 is grounded through a wire. The electric circuit and the waterway of the utility model are mutually independent, and the water pipe body is grounded, which has the characteristics of multiple insurances, safety and reliability.

Figure 1 and Figure 2 show a one-unit instant heat-sensitive ceramic electric water heater, while Figures 3 and 4 show four-unit instant heat-sensitive ceramic electric water heaters. Their structure and principle are the same, but the heating efficiency is different.

The upper and lower connecting parts in Fig. 3 are composed of plastic pipe 4 and metal screw 5. After the plastic pipe 4 and the screw 5 are hot-melt glued, they are connected to the water pipe body 1 through a high-temperature gasket 15. In use, they can be used in groups and energized, which is convenient for water temperature adjustment in spring, summer, autumn and winter. In addition, the pipe thread adopts pre-coating process, which can make the thread tight, and the high-temperature gasket can effectively prevent leakage. Because the utility model is equipped with a thermal protector 3, the water temperature does not exceed 65° C., and at the same time, the power supply can be automatically cut off when the water is cut off, and the plastic pipe and the electric heating body of the connecting part can be effectively protected.

As long as the length of the water pipe body is changed in the utility model, it can be conveniently designed into a series of products with different powers.

Claims (5)

1. An instant heat-sensitive ceramic electric water heater, which comprises a water pipe body and an electric heater with a water inlet and a water outlet, is characterized in that, the electric heater comprises a heat-sensitive ceramic element, and the two heat-sensitive ceramic elements The parallel metal sheets installed on the side, and the heat-conducting and insulating ceramic sheets respectively installed on the outside of the two parallel metal sheets. The terminals of the parallel metal sheets are connected, connected in series with the thermal protector, and connected to the power supply as a power line. 2. The instant heat-sensitive ceramic electric water heater according to claim 1, characterized in that, the water pipe body is provided with fin-shaped heat sinks that can increase the heat dissipation area. 3. The instant heat-sensitive ceramic electric water heater according to claim 1, characterized in that, the water pipe body and the electric heating body are separated by a heat-conducting insulating ceramic sheet and encapsulated by high-temperature heat-resistant silica gel. 4. The instant heat-sensitive ceramic electric water heater according to claim 1, characterized in that the lead-out end of the electric heating body is encapsulated with sealing silica gel. 5. The instant heat-sensitive ceramic electric water heater according to claim 1, characterized in that, the water inlet and outlet of the water pipe body are respectively equipped with stainless steel hose connectors, high-temperature gaskets to prevent leakage and metal grounding rings , the metal grounding ring is grounded through the wire.

Images