CN110906424B

CN110906424B - Hot air type heat storage electric heater

Info

Publication number: CN110906424B
Application number: CN202010091685.0A
Authority: CN
Inventors: 马纯山; 张磊
Original assignee: Zhongchuang Jieneng Tianjin Technology Co ltd; Beijing Manhai Energy Technology Development Co Ltd
Current assignee: Zhongchuang Jieneng (Jining) Technology Development Co.,Ltd.; ZHONGCHUANG JIENENG (TIANJIN) TECHNOLOGY Co.,Ltd.
Priority date: 2020-02-14
Filing date: 2020-02-14
Publication date: 2020-05-15
Anticipated expiration: 2040-02-14
Also published as: CN110906424A

Abstract

The invention provides a hot air type heat accumulation electric heater, comprising: the heat storage water tank is used for storing liquid, and an optical wave tube assembly is arranged in the heat storage water tank and used for heating the liquid; the electric heating device is communicated with the heat storage water tank and is provided with a PTC heater, a surface cooler, a circulating pump, an air outlet, a fan arranged between the PTC heater and the surface cooler and an expansion water tank, wherein liquid in the heat storage water tank circulates from the heat storage water tank to the surface cooler under the action of the circulating pump, and heat generated by the PTC heater and heat carried by the liquid in the heat storage water tank flow to the air outlet under the action of the fan; the light wave tube component comprises a light wave tube, a sleeve and fixing pieces, wherein the fixing pieces are positioned at two ends of the sleeve and used for fixing the light wave tube in the middle of the sleeve without directly contacting the light wave tube with the sleeve; the expansion water tank is communicated with the heat storage water tank through a first pipeline and is communicated with the heat storage water tank through a second pipeline via a circulating pump and a surface cooler.

Description

Hot air type heat storage electric heater

Technical Field

The invention relates to the technical field of temperature control and temperature regulation, in particular to a hot air type heat storage electric heater.

Background

At present, new problems appear in the development of the power industry and the change of the power demand in China. The peak load of the power grid increases rapidly, and the load rate of the power grid decreases year by year. In addition, with the development of economy, the difference of urban electricity consumption peak valley in China is gradually increased. Huge power peak-valley difference and peak value increase speed inevitably put high requirements on power peak regulation and also pose certain threat to the safe operation of a power grid.

In recent years, an electric heater having a heat storage function has been attracting attention in the industry of environmental temperature control and adjustment devices. The electric heater can store heat by utilizing off-peak electricity, and the stored heat can be used for regulating and controlling indoor temperature (commonly called as heating in daily life) at any time. The method is not only beneficial to relieving the peak-valley difference of the power consumption, but also can save the operation cost in the area where the peak-valley power price is calculated, thereby having wide application prospect.

The conventional heat accumulating electric heater is a solid heat accumulating electric heater, which uses an electric heating tube (e.g., an electric heating rod) as a heating element and a heat accumulating brick (solid) as a heating medium. After the current flows through the resistor to generate heat, the electric energy is converted into heat energy and stored in a high-density medium in the electric heater, and then the heating purpose is achieved through a radiation mode. For example, the existing electric storage heater usually uses an electric resistance heating rod to heat water, and the heating principle is the thermal effect of applying current. The current is conducted into the electric heating rod through the power supply connector and the leading-out rod, the metal tube is heated by the heat generated by the electric heating rod, and the heat is transferred to the heated object through the high-temperature radiation effect on the surface of the metal tube. The electric heating rod is uniformly distributed with high-temperature resistance wires in the high-temperature resistant stainless steel seamless tube, and the gap part is densely filled with crystallized magnesia powder with good heat-conducting property and insulating property. When current passes through the high-temperature resistance wire, the generated heat is diffused to the surface of the metal tube through the crystallized magnesia powder and then is transferred to a heated object or air, so that the heating purpose is achieved.

Although the existing heat accumulating type electric heater has high heat accumulating temperature, heat is required to be passively dissipated by utilizing a heat convection mode, so that heat dissipation is difficult, the local area of the electric heater has high temperature and uneven indoor temperature, the room temperature cannot be rapidly increased, and real-time control cannot be performed according to the room temperature. Sometimes, the night heat storage capacity is not enough to meet the requirement of heating in the daytime, and at the moment, the direct heating function is not available to replace or supply heat in parallel. In addition, a resistance type electric heating rod is adopted as a heating element in a heat storage water tank of the conventional heat storage type electric heater, and the heating element is in direct contact with water, so that potential safety hazards such as electric leakage exist. Moreover, once the resistance type electric heating rod is damaged, the heat storage water tank can be maintained after water is drained, and therefore the maintenance is inconvenient, time-consuming and labor-consuming.

Disclosure of Invention

In order to solve the above problems, the present invention provides a hot air type heat storage electric heater, comprising: the heat storage water tank is used for storing liquid, and an optical wave tube assembly is arranged in the heat storage water tank and used for heating the liquid; the electric heating device is communicated with the heat storage water tank and is provided with a PTC heater, a surface cooler, a circulating pump, an air outlet, a fan arranged between the PTC heater and the surface cooler and an expansion water tank, wherein liquid in the heat storage water tank circulates from the heat storage water tank to the surface cooler under the action of the circulating pump, and heat generated by the PTC heater and heat carried by the liquid in the heat storage water tank flow to the air outlet under the action of the fan; the light wave tube component comprises a light wave tube, a sleeve and fixing pieces, wherein the fixing pieces are positioned at two ends of the sleeve and used for fixing the light wave tube in the middle of the sleeve without directly contacting the light wave tube with the sleeve; the expansion water tank is communicated with the heat storage water tank through a first pipeline and is communicated with the heat storage water tank through a second pipeline via a circulating pump and a surface cooler.

Furthermore, a quartz glass tube is nested in the sleeve, and halogen element gas is filled in the quartz glass tube and a tungsten filament is arranged in the quartz glass tube.

Further, the halogen element gas is methyl bromide and/or high-purity nitrogen.

Furthermore, the heating device is also provided with an air inlet which is arranged opposite to the air outlet, and air entering the electric heating device from the air inlet is discharged from the air outlet under the action of the fan.

Further, the expansion tank is positioned at the upper part of the electric heating device.

Further, the electric heating device is also provided with a water replenishing port which is positioned at the upper part of the expansion water tank and is communicated with the expansion water tank.

Further, the circulation pump does not have a self-priming function.

Further, the heat storage water tank is also provided with a liquid level pipe for displaying the remaining amount of the liquid in the heat storage water tank.

The invention has the beneficial effects that: the application of the PTC and the light wave tube realizes real water-electricity separation, the safety coefficient is higher, the PTC direct heating function is added, the requirements of different users are met, and the indoor temperature can be quickly increased; the application of the light wave tube replaces a resistance type heating rod heated by a traditional water tank, water and electricity separation is really realized, a heating element is damaged, water drainage operation is not needed, the heating element can be replaced after power failure, and time and labor are saved; the problem of traditional heat accumulation electric heater heat dissipation difficulty, only be limited to indoor local heating, the room temperature is inhomogeneous, the heat accumulation volume is not enough and does not have the direct heating function and satisfy the difficulty of heating is solved.

1. A mixed heating mode of the PTC heater and the light wave tube is designed, and the safety problem is really solved by adopting the self characteristics of the two heating modes.

2. Design heat storage water tank and directly hot function, satisfy the heating all day, realize the complementation of directly hot and heat accumulation function, the direct hot function is opened to off-peak electricity period heat accumulation when the heat accumulation is not enough, really realizes that the operation is energy-conserving to satisfy the heating demand simultaneously.

3. The heating structure of light wave pipe has replaced the heating methods of traditional resistance-type heating rod, has really realized water and electricity separation heating, and is fixed simple, and it is convenient to dismantle, has avoided changing the drawback that needs sluicing because of resistance-type heating in the aquatic heating, and it is convenient to maintain.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

Fig. 1 illustrates a perspective view of a hot air type thermal storage electric heater according to an embodiment of the present invention.

Fig. 2 illustrates a cross-sectional view of a hot air type thermal storage electric heater according to an embodiment of the present invention, which shows the internal structures of a thermal storage water tank and an electric heating device.

Fig. 3 shows a schematic diagram of a light-wave tube and an arrangement between the light-wave tube and a thermal storage water tank according to an embodiment of the invention.

Fig. 4 shows a schematic diagram of connection of a light wave tube and a hot water storage tank according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

For the convenience of understanding of the embodiments of the present invention, the following description will be further explained with reference to the drawings, but the embodiments are not to be construed as limiting the present invention.

First, a specific structure of a hot air type thermal storage electric heater according to an embodiment of the present invention will be described in detail with reference to fig. 1 and 2.

As shown in fig. 1 and 2, the hot air type thermal storage electric heater of the present invention is composed of an upper part and a lower part, i.e., a thermal storage water tank 18 and an electric heating device 19 communicated with the thermal storage water tank 18. As shown, the electric heating device 19 is generally located above the hot water storage tank 18.

The hot water storage tank 18 is used to store and heat liquid. The stored liquid is, for example, water, a superconducting liquid, or the like. Referring to fig. 2, the hot water storage tank 18 is generally configured as a cube, and the storage capacity may reach, for example, 200L or more. The hot water storage tank 18 is mainly used for heating and keeping warm the liquid therein when, for example, electricity is used in a valley. Therefore, the wall of the hot water storage tank 18 usually has a heat insulating function or is provided with a heat insulating layer. In the heat storage water tank 18, the heat storage temperature of water can reach about 85 ℃, and the heat storage temperature of the superconducting liquid can reach about 120 ℃. The liquid heat storage mode changes the problem that the traditional solid heat storage type electric heater is easy to store heat and difficult to dissipate heat, the heat is easier to release, and meanwhile, the superconducting liquid also solves the problem of freeze prevention in winter.

With continued reference to fig. 2, the hot water storage tank 18 is internally provided with a heating element for heating the stored liquid, that is, a heating device for the hot mode.

In one embodiment, the heating element is, for example, a light pipe assembly 6. The light-wave tube assembly 6 is preferably located near the lower portion of the thermal storage tank 18.

Referring to fig. 3 and 4, the light-wave tube assembly 6 includes a light-wave tube 21, a sleeve 17 and a fixing member 15. The optical wave tube assembly 6 may be provided in plurality, for example 2 as shown in fig. 2.

The light wave tube 21 is a tubular device. Two ends of the optical wave tube 21 are provided with wires, the wire at one end is used for connecting a live wire, and the wire at the other end is used for connecting a zero line. The light wave tube 21 mainly uses light waves in the invisible light portion of 5um to 15um, that is, in the infrared portion. The partial light wave has extremely strong permeability and radiation force, has obvious temperature control effect and resonance capacity, can enable liquid molecules (water molecules) to generate resonance and activation, enhances the binding force among the common molecules, and enables the liquid to be heated rapidly. The light wave has very little loss in the process of transmitting heat, and can radiate heat energy into heated liquid (such as water) linearly. Because there is no transmission interface, the radiation of light wave makes the heat energy more effectively used in the heated liquid, and the light wave enhances the heat energy conversion and obviously improves the heat efficiency. In addition, the longer the wavelength, the greater the depth of penetration, and this part of light wave can not only transmit the heat energy to the surface of the object, but also directly transmit the heat energy to a certain depth of the liquid, which can significantly improve the heating efficiency. The biggest difference between optical radiation heating and existing resistive heating is that: under the condition of the same power consumption, the optical radiation heating radiates all heat energy into the heated medium, so that the process of heat conduction through the medium is reduced, the heat loss is less, and the heat efficiency is high.

A sleeve 17 is arranged inside the tank of the hot water storage tank 18, surrounded by the liquid 16. The sleeve 17 is fixed to the tank at both ends thereof through the side wall of the tank. The sleeve 17 is made of a corrosion-resistant material such as 304 stainless steel. The sleeve 17 is internally nested with a quartz glass tube filled with halogen element gas and provided with a tungsten filament. The halogen element gas is, for example, methyl bromide and high-purity nitrogen, wherein the methyl bromide accounts for 90% -95% and the high-purity nitrogen accounts for 5% -10%.

Referring to fig. 4, the both ends of the sleeve 17 are connected with fixing members 15 for fixing the light-wave tube 21 in the middle of the sleeve 17 without the light-wave tube 21 directly contacting the sleeve 17. The fixing member 15 may be made of, for example, a high temperature resistant silicone rubber or the like. The wires of the optical wave tube extend outward through the fixing member 15.

In the case where the optical wave tube 21 is damaged and needs to be repaired or replaced, the electric heater is powered off, the electric cover 14 (shown in fig. 1, the electric cover 14 is used to cover the fixing member 15 and isolate the optical wave tube from the environment) is opened, the wires at both ends of the optical wave tube 21 are disconnected, the fixing member 15 is removed from the optical wave tube 21, and then the optical wave tube 21 is removed from the sleeve 17. The repaired optical wave tube or a new optical wave tube is fixed by the fixing part 15, inserted into the sleeve 17, and then the wires at the two sides of the optical wave tube are connected with the fire wire end and the zero wire end again, and finally the cover 14 is covered. Therefore, the light wave tube really realizes water-electricity separation, and does not need to be replaced by draining water.

Referring back now to fig. 2, details of the electric heating device 19 are described. The electric heating device 19 and the hot water storage tank 18 communicate with each other for controlling the circulation of the liquid in the hot water storage tank 18 on the one hand and for performing heating in a direct heating mode and forced air circulation on the other hand.

The electric heating device 19 is usually configured as a housing in the form of a cube, the individual elements being accommodated in the housing or on the side walls thereof.

Specifically, the electric heating device 19 includes the outlet port 1 provided on one side wall of the housing, the fan 3 and the PTC heater 2 located inside the electric heating device 19. The PTC heater 2 is also located inside the electric heating device 19 and between the outlet 1 and the fan 3 as a heating element for heating in a direct heating mode. When the heat storage amount and the liquid temperature in the heat storage water tank 18 do not meet the requirements, the direct heating mode can be selected to be started for supplying heat. That is, the PTC heater 2 is heated, and the fan 3 directly blows out heat generated by the PTC heater 2 from the outlet port 1.

The PTC heater is also called as PTC heating body, and consists of PTC heating chip, ceramic chip, conducting strip, insulating film, aluminum pipe, radiating fin and other parts. A PTC heater of this type is typically a temperature sensitive semiconductor resistor whose resistance increases in a stepwise manner with increasing temperature above a certain temperature (curie temperature). The surface temperature of the PTC can be well controlled by using the characteristics as a heating component, and the effects of reliability and safety are achieved. The PTC heater also has the advantages of small thermal resistance and high heat exchange efficiency, and is an automatic constant-temperature and electricity-saving electric heater. When the fan stops due to faults, the temperature of the PTC heater rises, the resistance is increased, the power is reduced, the surface temperature is constant at about 200 ℃, and fire hazard cannot be generated.

In order to solve the disadvantages of uneven indoor temperature, passive heat dissipation and slow temperature rise, the electric heating device 19 may be provided with an air inlet 11. The air inlet 11 is provided on a side wall opposite to a side wall where the air outlet 1 is provided, so that convection is generated between the air outlet 1 and the air inlet 11. The fan 3 can forcibly circulate the indoor air, so that the indoor air enters the electric heater from the air inlet 11 and is blown out from the air outlet.

In order to effectively circulate the liquid in the hot water storage tank 18 to the electric heating device 19 so that the heat of the liquid is blown out of the electric heating device 19 by the fan 3, the electric heating device 19 is internally provided with a surface air cooler 10, a circulating pump 4, a plurality of pipelines for communicating the surface air cooler 10 with the circulating pump 4 and communicating the surface air cooler 10 with the hot water storage tank 18. And starting the circulating pump 4 to circulate the liquid in the heat storage water tank 18 to the surface air cooler 10, wherein copper pipes are fully distributed in the surface air cooler, and fins are arranged on the surfaces of the copper pipes to increase the heat dissipation function. Under the drive of the fan 3, the heat of the liquid in the hot water storage tank 18 is blown out from the air outlet 1 to achieve the heating effect.

The direct heating function (PTC heater 2) is to dissipate heat in the form of hot air while matching the fan 3. Therefore, the blower fan 3 is placed between the PTC heater 2 and the surface air cooler 10, and because the PTC heater 2 has a high heat, the PTC heater 2 is placed most forward (i.e., most advanced from the outlet port 1), and the temperature of the liquid in the surface air cooler 10 is lower than that of the PTC heater 2, and therefore, the surface air cooler 10 is placed behind the blower fan 3 (i.e., farther from the outlet port 1). When the PTC heater 2 is heated, the fan 3 forcibly blows out heat; when the surface air cooler 10 works, indoor circulating air enters from the air inlet 11 and flows through the surface air cooler 10, then the fan 3 forcibly brings out hot air, and the design reduces the resistance of the fan and reduces the power of the fan and the noise of the electric heater.

Thus, the hot air type heat storage electric heater of the present invention realizes a combination of (1) a direct heat function (PTC heater) and (2) a heat storage function (light wave tube), and discharges heat from the electric heater as hot air.

The circulation pump 4 may be a self-priming pump having a self-priming function. However, self-priming pumps have the disadvantages of large size and high noise. To overcome this problem, a common circulation pump may be used. In order to make the common circulating pump realize the pumping function and meet the requirement of keeping the heat storage water tank 18 in the normal pressure equipment (otherwise, if the closed circulating equipment runs under pressure after being heated, certain risk exists when the closed circulating equipment is placed indoors), the expansion water tank 9 is arranged above the electric heating device 19.

The expansion tank 9 changes the whole electric heater into a normal pressure device and simultaneously increases the water level of the whole electric heater. Because the circulating pump does not have a self-suction function and can not extract the liquid in the heat storage water tank, the water level of the whole system is improved, the position of the circulating pump is designed between the heat storage water tank 18 and the expansion water tank 9, and the circulating pump can directly utilize the self circulation capacity to circulate the liquid in the heat storage water tank 18.

The expansion tank 9 is connected with 2 passages, and one passage directly communicates the expansion tank 9 with the heat storage tank 18 as shown by the water outlet 5. The other path is communicated with a heat storage water tank 18 through a circulating pump 4 and a surface cooler 10, as shown by a water return port 7.

A water replenishing port 8 can be arranged at the upper part of the expansion water tank 9. The expansion water tank 9 is connected with the water replenishing port 8, and the electric heater operates in an open mode to avoid bearing pressure. The liquid entering through the water replenishing port 8 firstly enters the expansion water tank 9 and then enters the heat storage water tank 18 through the water outlet 5.

In particular, liquid (for example water) flows from the make-up water port 8 (usually located at the top of the electric heating device 19) into the expansion tank 9. One side of the fan 3 is provided with a PTC heater 2, and the other side is provided with a surface air cooler 10 and an expansion water tank 9. A circulating pump 4 is arranged between the expansion water tank 9 and the heat storage water tank 18, a water outlet pipe connected with the circulating pump 4 extends into the upper part of the water tank (as shown by the reference numeral '5' in fig. 2), and a water inlet pipe connected with the circulating pump 4 passes through the expansion water tank 9 and the surface air cooler 10 to be connected in series and then returns to the heat storage water tank 18 (as shown by the reference numeral '7' in fig. 2).

The electric heating device 19 further comprises a liquid level pipe 12 for enabling an operator to observe the water level in the hot water storage tank 18, and to monitor the water level in the tank in real time so as to replenish water in time.

Further, the electric heater of the invention also comprises an indoor temperature controller which is used for monitoring the indoor temperature in real time and controlling the starting and stopping of the electric heater according to the indoor temperature.

As another example, the electric heater is a cylindrical structure, a water tank is loaded in the electric heater, a fan is arranged at the top of the water tank, a PTC heater is arranged on one side of the fan, a surface air cooler and an expansion water tank are arranged on the other side of the fan, a circulating pump is arranged between the expansion water tank and heat storage water, a water outlet pipe connected with the circulating pump extends into the upper part of the water tank, a water inlet pipe connected with the circulating pump passes through the water tank and is connected in series with the surface air cooler and then returns into the water tank, the PTC heater has small thermal resistance and high heat exchange efficiency, light radiation of a heating light source in the water tank can be completely absorbed by a water medium in the water tank, heat loss is small, heat storage and storage are realized through the water medium.

The working modes of the hot air type heat storage electric heater are as follows:

direct heating mode (PTC heater 2):

and (4) switching to a direct heating mode by pressing a mode key, and when the temperature of the air return inlet is less than or equal to the set temperature, meeting the direct heating starting condition and starting the PTC heater 2. The thyristor controls the PTC heater 2 to perform soft start for a predetermined time (e.g., 1 minute). After the time is more than (>) 1 minute, the PTC heater 2 is rapidly heated, the sizes of the PTC heater 2 and the fan 3 are adjusted according to the wind speed gear, when the return air inlet temperature = the set temperature, the PTC heater 2 stops working, the fan 3 performs post-cleaning, and the fan operates at the maximum wind speed for a preset time (for example, 1 minute) to dissipate waste heat. When the temperature meets the requirement again (the temperature of the return air inlet is less than or equal to the set temperature), the heating is started again.

Heat storage mode (optical wave tube module 6):

when the time is in a preset time period (for example, from 20 pm to 8 am, so-called peak valley of electricity consumption), the hot air type heat accumulation electric heater of the invention can automatically enter a heat accumulation heating state. If heating demand exists (the temperature of the return air inlet is less than or equal to the set temperature), the PTC heater 2 is started to heat, if no heating demand exists and the total working time of the PTC heater 2 is longer than (>) preset time (for example, 1 minute), the heating of the PTC heater 2 is stopped, the heating is switched to light wave tube heating (the temperature of the water tank is less than 80 ℃), the heat storage state is entered, the circulating pump 4 operates for 1 minute every 10 minutes, and when the temperature of the water tank is more than 80 ℃, the heat storage is stopped.

Daytime heat release mode (morning peak power period):

when the time is from 8 am to 20 pm, the hot air type heat accumulation electric heater of the invention enters a heat release state. If heating needs exist (the temperature of the return air inlet is less than or equal to the set temperature), the circulating pump 4 pumps liquid (usually water) in the heat storage water tank 18 from the water outlet 5, then the liquid is circulated to the surface air cooler 10, the fan 3 brings heat out of the surface air cooler 10, and the water returns to the heat storage water tank 18 through the return water inlet 7 and circulates in a reciprocating mode. When the water temperature in the water tank is lower than 30 ℃, the system starts the PTC heater 2 to heat and operates according to a direct heating working mode.

Adding water into the equipment:

a tap water pipe is connected to the water inlet 13 of the device, water is added into the heat storage water tank 18 through the water inlet 13 to a certain degree, and the change of the water level can be seen in the liquid level pipe 12. When the requirement is met, the water is stopped from the water inlet 13, the water is added from the water supplementing opening 8 above, and the water is stopped when the water level is added to the normal water level.

The application of PTC and light wave tube has realized really water and electricity separation, and factor of safety is higher, has increased the direct hot function of PTC simultaneously, satisfies different users' demand, can promote indoor temperature rapidly.

The application of light wave pipe replaces the resistance-type heating rod of traditional water tank heating, really realizes the water and electricity separation, and heating element damages and need not the sluicing operation, and the outage can be changed labour saving and time saving.

The problem of traditional heat accumulation electric heater heat dissipation difficulty, only be limited to indoor local heating, the room temperature is inhomogeneous, the heat accumulation volume is not enough and does not have the direct heating function and satisfy the difficulty of heating is solved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A hot air type heat accumulation electric heater is characterized by comprising:

the heat storage water tank is used for storing liquid, and an optical wave tube assembly is arranged in the heat storage water tank and used for heating the liquid; the electric heating device is communicated with the heat storage water tank and is provided with a PTC heater, a surface air cooler, a circulating pump, an air outlet, a fan arranged between the PTC heater and the surface air cooler and an expansion water tank arranged at the upper part of the electric heating device, wherein the light wave tube assembly comprises a light wave tube, a sleeve and fixing pieces, the fixing pieces are arranged at two ends of the sleeve and used for fixing the light wave tube in the middle of the sleeve without directly contacting the light wave tube with the sleeve; a quartz glass tube is nested in the sleeve; the circulating pump does not have a self-absorption function and is designed between the heat storage water tank and the expansion water tank, so that liquid in the heat storage water tank circulates to the surface air cooler from the heat storage water tank under the action of the circulating pump, and heat generated by the PTC heater and heat carried by the liquid in the heat storage water tank flow to the air outlet under the action of the fan; the expansion water tank is communicated with the heat storage water tank through a first pipeline and is communicated with the heat storage water tank through a second pipeline through a circulating pump and a surface cooler; the electric heating device is also provided with an air inlet which is arranged opposite to the air outlet, and air entering the electric heating device from the air inlet is exhausted from the air outlet under the action of the fan; the electric heating device is also provided with a water replenishing port which is positioned at the upper part of the expansion water tank and is communicated with the expansion water tank.

2. The hot-air thermal storage electric heater according to claim 1, wherein the quartz glass tube is filled with a halogen element gas and provided with a tungsten filament.

3. The hot-air type heat-storage electric heater according to claim 2, wherein the halogen element gas is methyl bromide and high-purity nitrogen.

4. The hot-air type thermal storage electric heater according to claim 1, wherein the thermal storage water tank is further provided with a liquid level tube for displaying a remaining amount of the liquid in the thermal storage water tank.