Electric heating device and air conditioner

Abstract

The invention relates to the technical field of air conditioners, in particular to an electric heating device and an air conditioner, the electric heating device comprises a heating part, a shell and heat preservation cotton, a first cavity is formed in the shell, the heating part is arranged in the first cavity, the heat preservation cotton surrounds the outer side of the shell, and the wiring end of the heating part is connected with a power line through a fusing part; the fusing component is located in the first cavity. The fusing part is directly connected with the wiring end of the heating part and arranged in the first cavity, the fusing part controls power off so as to control the heating temperature of the heating part, the reaction speed is high, the fusing part can conduct protection in advance before the temperature of the heat preservation cotton reaches the melting point, and therefore the hidden danger that smoke and fire are generated due to the fact that the temperature of the heat preservation cotton is too high is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an electric heating device and an air conditioner. Background Art

[0002] With the development of air conditioning, heat pump air conditioning has more and more application scenarios, and the requirements for outlet water temperature are getting higher and higher. The general outlet water temperature is basically around 50°. In order to achieve a higher temperature, electric heating of the water circuit is usually added to the water circuit. However, the electric heating of the water circuit is an electric heating tube. The temperature of the electric heating tube is related to the watt density. The higher the watt density, the greater the heat output and the higher the heated water temperature. The lower the watt density, the lower the heated water temperature. Therefore, the watt density is basically high, so that the water temperature can be quickly heated to the highest. At the same time, in order to keep warm, a layer of insulation cotton is added to the outside of the electric heating. However, when the watt density is higher and the water flow rate is lower, the temperature of the cylinder in contact with the insulation cotton will be higher, which may melt and cause the insulation cotton to catch fire, creating hidden dangers.

[0003] When the existing electric heating tube is heated, the water flow is unstable and sometimes the water flow is small, resulting in insufficient water to take away the heat of the heating tube, causing the temperature of the tube to be high. The outer surface of the tube is wrapped with a layer of heat-insulating cotton. If the temperature reaches the ignition point of the heat-insulating cotton, the heat-insulating cotton will smoke or even catch fire. Summary of the invention

[0004] The present invention provides an electric heating device and an air conditioner to solve one of the defects in the prior art. The connection terminals of a fuse component and a heating component are directly connected and arranged in a first cavity. The fuse component controls power failure and thus controls the heating temperature of the heating component quickly. The fuse component can provide protection in advance before the temperature of the thermal insulation cotton reaches the melting point, thereby avoiding the hidden dangers of smoke and fire caused by excessive temperature of the thermal insulation cotton.

[0005] The present invention provides an electric heating device, comprising a heating component, a shell and thermal insulation cotton, wherein a first cavity is provided inside the shell, the heating component is arranged in the first cavity, the thermal insulation cotton is arranged around the outside of the shell, the connection terminal of the heating component is connected to a power line through a fuse component, and the fuse component is located in the first cavity.

[0006] According to an electric heating device provided by the present invention, the fuse component includes a first fuse and a second fuse, the neutral line end of the heating component is connected to the neutral line of the power line through the first fuse, and the live line end of the heating component is connected to the live line of the power line through the second fuse. In order to ensure that when the heating component or the first cavity reaches the fusing temperature of the fuse component, all power lines can be cut off in time, and there is no situation where other power lines are left connected to the outside, fuses are set on the circuits where the heating component needs to be connected to the two power lines.

[0007] According to an electric heating device provided by the present invention, the fusing component is connected to the power cord through the cold end. The function of the cold end is to prevent the temperature of the heating component from being transferred to the power cord and to conduct electricity.

[0008] According to an electric heating device provided by the present invention, a second cavity is formed between the heat-insulating cotton and the outer shell. With the air medium added between the outer shell and the heat-insulating cotton, the temperature can be effectively reduced, preventing the heat-insulating cotton from getting too hot and causing smoke or fire, thus solving the problem of safety accidents.

[0009] According to an electric heating device provided by the present invention, it further includes a liquid inlet pipe and a liquid outlet pipe. Both the liquid inlet pipe and the liquid outlet pipe are communicated with the first cavity, and the position of the liquid inlet pipe is lower than that of the liquid outlet pipe. The flow path of "inlet from below and outlet from above" can slow down the flow rate of the liquid through the first cavity, extend the liquid circulation time, and enhance the heating effect of the heating component.

[0010] According to an electric heating device provided by the present invention, the pipe section of the liquid inlet pipe passing through the second cavity is provided with a first opening, and a valve body is arranged at the first opening. The valve body is adapted to control the on-off of the first opening and the second cavity. Part of the liquid in the liquid inlet pipe is diverted through the first opening and enters the second cavity, gradually filling the second cavity. Using the liquid as the filling medium of the second cavity, a heat-insulating layer of liquid medium is formed between the heat-insulating cotton and the outer cylinder.

[0011] According to an electric heating device provided by the present invention, a first exhaust valve is arranged at the top of the second cavity. The gas can be discharged by opening the first exhaust valve to maintain the normal pressure state of the second cavity. At the same time, heat is carried away, the temperature is reduced, the possibility of the heat-insulating cotton smoking and catching fire is reduced, and the potential safety hazard is lowered.

[0012] According to an electric heating device provided by the present invention, a second exhaust valve is arranged at the top of the first cavity. When the liquid is heated and evaporated to produce gas, when the liquid medium is heated to the gaseous state, a certain pressure is generated to increase the pressure of the second cavity, and the gas rises and accumulates at the top of the first cavity. The gas is discharged by opening the second exhaust valve to maintain the normal pressure state of the first cavity and reduce the potential safety hazard.

[0013] According to an electric heating device provided by the present invention, it further includes a bracket, and the bracket is arranged between the outer shell and the heat-insulating cotton to support the heat-insulating cotton. The bracket can support the heat-insulating cotton according to the shape of the outer shell, providing a supporting and fixing function for the heat-insulating cotton.

[0014] An electric heating device provided by the present invention, wherein the bracket includes a sleeve and a top plate. The sleeve is sleeved outside the side wall of the housing, and the top plate is arranged outside the top of the housing and connected to the sleeve. The heat insulation cotton covers the outer walls of the sleeve and the top plate. To ensure that the second cavity between the heat insulation cotton and the housing can be filled with a liquid medium, under the condition of not changing the nature of the heat insulation cotton itself, the structure of the bracket and the housing is used in cooperation to realize the formation and sealing of the second cavity and the coverage range of the heat insulation cotton.

[0015] An electric heating device provided by the present invention, wherein a second opening is provided at the bottom of the second cavity. A second opening is arranged on the bracket at the bottom of the second cavity, and the second opening communicates with the second cavity, so that the liquid medium in the second cavity can be discharged.

[0016] The present invention also provides an air conditioner, including the electric heating device as described above.

[0017] In the electric heating device provided by the present invention, a heating component is arranged in the first cavity inside the housing. The heating component can heat and raise the temperature of the liquid in the first cavity. The heat insulation cotton is wrapped outside the housing, playing a role in heat preservation and heat insulation for the heating temperature of the heating component and the heating environment of the first cavity.

[0018] The power cord directly passes through the housing from the outside and enters the first cavity to be connected to the heating component to supply power to the heating component. A fusing component is added at the wiring terminal of the heating component. The heating component is connected to the power cord through the fusing component. The fusing component also has a conductive function. The current from the power cord flows into the heating component through the fusing component to supply power to the heating component, and the heating component is energized to heat.

[0019] The fusing component is located in the first cavity. When the temperature in the first cavity reaches a certain degree or when the electric heating device is in a dry burning state, the temperature of the heating component rises sharply, which will cause the temperature of the fusing component to also rise. When the temperature of the fusing component reaches a certain temperature, it disconnects, cutting off the power supply of the heating component, and the heating component stops heating and raising the temperature. Thus, by setting the fusing component to control the power-on state of the heating component, when the heating temperature or the temperature in the first cavity is too high, the power supply of the heating component is cut off in time, and the heating component stops heating to achieve the effect of reducing the temperature of the heat insulation cotton.

[0020] In this embodiment, the fusing component is directly connected to the wiring terminal of the heating component and is arranged in the first cavity. Once the fusing component fuses, the heating component immediately cuts off the power and stops heating. Since there is a medium between the heating component and the heat insulation cotton, it takes a certain amount of time for the heat to conduct from the heating component to the heat insulation cotton. Therefore, the fusing component can provide protection in advance before the temperature of the heat insulation cotton reaches the melting point, thereby avoiding the potential hazards of smoking and fire caused by too high a temperature of the heat insulation cotton. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is one of the structural schematic diagrams of the electric heating device provided by the embodiment of the present invention; Figure 2 It is another structural schematic diagram of the electric heating device provided by the embodiment of the present invention; Figure 3 It is the third structural schematic diagram of the electric heating device provided by the embodiment of the present invention.

[0023] Reference numerals: 100, heating component; 110, power cord; 111, neutral wire; 112, live wire; 120, temperature sensor; 130, contactor; 140, fusing component; 141, first fuse; 142, second fuse; 150, cold end; 200, housing; 210, first cavity; 220, second exhaust valve; 300, heat insulation cotton; 310, second cavity; 320, first exhaust valve; 330, second opening; 400, liquid inlet pipe; 410, first opening; 500, liquid outlet pipe; 600, bracket; 610, sleeve; 620, top plate. Detailed implementation manners

[0024] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention in conjunction with the drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0025] As Figure 1 shown, the electric heating device provided by the embodiment of the present invention includes a heating component 100, a housing 200 and a heat insulation cotton 300. A first cavity 210 is provided inside the housing 200. The heating component 100 is arranged in the first cavity 210. The heat insulation cotton 300 is disposed around the outside of the housing 200. The connection terminal of the heating component 100 is connected to the power cord 110 through a fusing component 140, and the fusing component 140 is located in the first cavity 210.

[0026] In the electric heating device according to the embodiment of the present invention, a heating component 100 is arranged in a first cavity 210 inside a housing 200. The heating component 100 can heat up the liquid in the first cavity 210. A heat insulation cotton 300 is wrapped outside the housing 200 to play a role in heat preservation and heat insulation for the heating temperature of the heating component 100 and the heating environment of the first cavity 210.

[0027] A power cord 110 directly passes through the housing 200 from the outside and enters the first cavity 210 to be connected to the heating component 100 to supply power to the heating component 100. A fusing component 140 is added to the connection terminal of the heating component 100. The heating component 100 is connected to the power cord 110 through the fusing component 140. The fusing component 140 also has a conductive function. The current from the power cord 110 flows into the heating component 100 through the fusing component 140 to supply power to the heating component 100, and the heating component 100 is powered on for heating.

[0028] The fusing component 140 is located in the first cavity 210. When the temperature in the first cavity 210 reaches a certain level or when the electric heating device is in a dry burning state, the temperature of the heating component 100 rises sharply, which will cause the temperature of the fusing component 140 to also rise. When the temperature of the fusing component 140 reaches a certain temperature, it disconnects, cutting off the power supply to the heating component 100, and the heating component 100 stops heating up. Thus, by setting the fusing component 140 to control the power-on state of the heating component 100, when the heating temperature or the temperature in the first cavity 210 is too high, the power supply to the heating component 100 is cut off in time, and the heating component 100 stops heating to achieve the effect of cooling the heat insulation cotton 300.

[0029] In this embodiment, the fusing component 140 is directly connected to the connection terminal of the heating component 100 and is arranged in the first cavity 210. Once the fusing component 140 fuses, the heating component 100 immediately cuts off the power and stops heating. Since there is a medium between the heating component 100 and the heat insulation cotton 300, it takes a certain amount of time for the heat to conduct from the heating component 100 to the heat insulation cotton 300. Therefore, the fusing component 140 can provide protection in advance before the temperature of the heat insulation cotton 300 reaches the melting point, thus avoiding the potential hazards of smoking and fire caused by too high a temperature of the heat insulation cotton 300.

[0030] In this embodiment, the fusing temperature of the fusing component 140 is selected to be less than the ignition temperature of the heat insulation cotton 300 to achieve early protection and avoid the problem that the residual heat of the heating component 100 causes the temperature of the heat insulation cotton 300 to continue to rise. The ignition temperature of the heat insulation cotton 300 can be selected according to the material of the heat insulation cotton 300.

[0031] According to an embodiment provided by the present invention, the fusing component 140 includes a first fuse 141 and a second fuse 142. The neutral line 111 end of the heating component 100 is connected to the neutral line 111 of the power supply line 110 through the first fuse 141, and the live line 112 end of the heating component 100 is connected to the live line 112 of the power supply line 110 through the second fuse 142.

[0032] In this embodiment, the heating component 100 adopts an electric heating tube. The electric heating tube is connected to two power supply lines 110, namely the neutral line 111 and the live line 112 respectively. The power supply line 110 supplies power to the electric heating tube. The electric heating tube is spirally arranged along the liquid flow direction in the first cavity 210 to achieve the effect of fully heating and raising the temperature of the liquid in the first cavity 210. At the same time, the connection terminals of the heating component 100 are also correspondingly set as the neutral line 111 end connected to the neutral line 111 and the live line 112 end connected to the live line 112. The neutral line 111 end is connected to the neutral line 111 through the first fuse 141, and the live line 112 end is connected to the live line 112 through the second fuse 142. To ensure that when the heating component 100 or the first cavity 210 reaches the fusing temperature of the fusing component 140, all the power supply lines 110 can be cut off in time, and there is no situation of external power connection of other remaining power supply lines 110, fuses are provided on the circuits where the heating component 100 needs to be connected to the two power supply lines 110.

[0033] In other embodiments, it is possible to only select that the neutral line 111 end of the heating component 100 is connected to the neutral line 111 through the first fuse 141, or the live line 112 end of the heating component 100 is connected to the live line 112 through the second fuse 142.

[0034] According to an embodiment provided by the present invention, the fusing component 140 is connected to the power supply line 110 through the cold end 150. In this embodiment, after the fusing component 140 is arranged at the connection terminal of the heating component 100, it is connected to the power supply line 110 by connecting the cold end 150. The function of the cold end 150 is to prevent the temperature of the heating component 100 from being transmitted to the power supply line 110 and has a conductive function.

[0035] As Figure 2 shown, according to an embodiment provided by the present invention, a second cavity 310 is formed between the heat insulation cotton 300 and the outer shell 200. In this embodiment, the space surrounded by the heat insulation cotton 300 and the housing forms the second cavity 310. After the heat generated by the heating component 100 is transmitted to the outer shell 200, it is then transmitted from the outer shell 200 to the second cavity 310, and finally from the second cavity 310 to the heat insulation cotton 300, which can reduce the heat transfer from the outer shell 200 directly to the heat insulation cotton 300 to a certain extent.

[0036] Air is used as the heat insulation medium in the second cavity 310, which can play the role of heat insulation and temperature reduction during the heat transfer process. When the heat of the heating component 100 in the first cavity 210 is transferred to the second cavity 310, it will be significantly reduced. That is, compared with the prior art where the heat generated by the electric heating tube is transferred to the outer shell 200, and the outer shell 200 directly transfers to the heat preservation cotton 300, there is an air medium between the outer shell 200 and the heat preservation cotton 300, which can effectively reduce the temperature and prevent the heat preservation cotton 300 from catching fire or smoking due to temperature rise, thus solving the problem of safety accidents. Moreover, the setting of the second cavity 310 is equivalent to adding an air heat preservation layer between the outer shell 200 and the heat preservation cotton 300. It can not only achieve the heat insulation effect relative to the heat preservation cotton 300, but also play a role in maintaining the temperature of the temperature environment in the first cavity 210 to a certain extent.

[0037] In other embodiments, a sealed cavity can also be formed between the heat preservation cotton 300 and the outer shell 200, that is, the second cavity 310 can also be a vacuum cavity, which can also insulate heat, reduce heat transfer, and cool down the heat preservation cotton 300.

[0038] According to an embodiment provided by the present invention, the electric heating device further includes a liquid inlet pipe 400 and a liquid outlet pipe 500. Both the liquid inlet pipe 400 and the liquid outlet pipe 500 are communicated with the first cavity 210, and the position of the liquid inlet pipe 400 is lower than the position of the liquid outlet pipe 500. In this embodiment, the liquid flows through the first cavity 210 from bottom to top in the vertical direction. Therefore, the position of the liquid inlet pipe 400 is lower than the position of the liquid outlet pipe 500. The liquid enters the inside of the first cavity 210 through the liquid inlet pipe 400, gradually accumulates to the position of the liquid outlet pipe 500, and flows out through the liquid outlet pipe 500. The heating component 100 heats the liquid during the process of the liquid flowing through the first cavity 210. The bottom-in and top-out flow path can delay the flow rate of the liquid flowing through the first cavity 210, and at the same time extend the liquid flow time, enhancing the heating effect of the heating component 100.

[0039] As Figure 3 shown, according to an embodiment provided by the present invention, the pipe section of the liquid inlet pipe 400 passing through the second cavity 310 is provided with a first opening 410, and a valve body is provided at the first opening 410. The valve body is adapted to control the on-off of the first opening 410 and the second cavity 310. In this embodiment, the liquid inlet pipe 400 passes through the heat preservation cotton 300 and enters the second cavity 310, passes through the outer shell 200 after passing through the second cavity 310, and finally communicates with the first cavity 210. The first opening 410 is provided on the pipe section of the liquid inlet pipe 400 passing through the second cavity 310, and a valve body is provided at the first opening 410. When the valve body is opened, the first opening 410 is communicated with the second cavity 310. When the valve body is closed, the first opening 410 is disconnected from the second cavity 310.

[0040] When there is normal liquid flow in the liquid inlet pipe 400, the valve body opens, enabling the first opening 410 to communicate with the second cavity 310. A part of the liquid in the liquid inlet pipe 400 is diverted through the first opening 410 and enters the second cavity 310, gradually filling the second cavity 310. With the liquid as the filling medium for the second cavity 310, a heat-insulating layer of liquid medium is formed between the heat-insulating cotton 300 and the outer cylinder. When there is no liquid flow in the liquid inlet pipe 400, the valve body closes, disconnecting the first opening 410 from the second cavity 310, and the liquid in the second cavity 310 remains in the second cavity 310. Using the liquid in the liquid inlet pipe 400 as the filling medium for the second cavity 310 eliminates the need for another device structure to provide the medium for the second cavity 310, making it more convenient and faster to obtain and the device structure simpler and more compact.

[0041] When the heating component 100 heats up the liquid in the first cavity 210, the outer shell 200 transfers the heat to the liquid in the second cavity 310. The liquid in the second cavity 310 absorbs heat and evaporates, consuming a part of the heat transferred to the heat-insulating cotton 300, thereby reducing the temperature of the heat-insulating cotton 300 and keeping the heat-insulating cotton 300 within a reasonable temperature range so as not to catch fire or produce a flame.

[0042] According to an embodiment provided by the present invention, a first exhaust valve 320 is provided at the top of the second cavity 310. In this embodiment, the first exhaust valve 320 passes through the heat-insulating cotton 300 from the outside to reach the top of the second cavity 310. When the temperature of the heating component 100 rises, the outer shell 200 also heats the liquid medium in the second cavity 310, and the temperature of the liquid medium also rises accordingly. The liquid medium evaporates, taking away part of the heat and generating gas. When the liquid medium is heated to the gaseous state, a certain pressure is generated to increase the pressure in the second cavity 310. The gas rises and accumulates at the top of the second cavity 310. The gas can be discharged by opening the first exhaust valve 320 to maintain the normal pressure state of the second cavity 310. At the same time, heat is taken away, the temperature is reduced, the possibility of the heat-insulating cotton 300 smoking and catching fire is reduced, and the safety hazard is lowered.

[0043] According to an embodiment provided by the present invention, a second exhaust valve 220 is provided at the top of the first cavity 210. In this embodiment, the second exhaust valve 220 passes through the heat-insulating cotton 300, the second cavity 310, and the outer shell 200 from the outside to the inside to reach the top of the first cavity 210. When the temperature of the heating component 100 rises, the liquid in the first cavity 210 is heated, and the liquid heats up and evaporates to generate gas. When the liquid medium is heated to the gaseous state, a certain pressure is generated to increase the pressure in the second cavity 310, and the gas rises and accumulates at the top of the first cavity 210. The gas is discharged by opening the second exhaust valve 220 to maintain the normal pressure state of the first cavity 210 and reduce the safety hazard.

[0044] According to an embodiment provided by the present invention, the electric heating device further includes a bracket 600, and the bracket 600 is disposed between the outer shell 200 and the heat insulation cotton 300 to support the heat insulation cotton 300. In this embodiment, the bracket 600 is disposed between the heat insulation cotton 300 and the outer shell 200, and the bracket 600 can support the heat insulation cotton 300 according to the shape of the outer shell 200, providing a supporting and fixing effect for the heat insulation cotton 300.

[0045] In this embodiment, the bracket 600 can be a multi-layer bracket 600 annularly distributed along the side wall of the outer shell 200, providing multi-point support and fixation for the heat insulation cotton 300 in the circumferential direction around the outer shell 200. On the basis of ensuring the support of the heat insulation cotton 300, it can also ensure the through effect of the second cavity 310 between the heat insulation cotton 300 and the outer shell 200.

[0046] According to an embodiment provided by the present invention, the bracket 600 includes a sleeve 610 and a top plate 620. The sleeve 610 is sleeved outside the side wall of the outer shell 200, and the top plate 620 is disposed outside the top of the outer shell 200 and is connected to the sleeve 610, and the heat insulation cotton 300 covers the outer walls of the sleeve 610 and the top plate 620.

[0047] In this embodiment, the bracket 600 is mainly composed of a sleeve 610 and a top plate 620. The outer shell 200 is divided into three parts: a top, a bottom, and a side wall. The sleeve 610 is sleeved outside the side wall of the outer shell 200, and the top plate 620 is located above the top of the outer shell 200, that is, the top plate 620 is connected to the top of the sleeve 610. The lower side of the top plate 620 and the inner side of the sleeve 610 are the second cavity 310, and the outer side of the sleeve 610 and the upper side of the top plate 620 are covered with the heat insulation cotton 300. Thus, the heat insulation cotton 300 is attached to the outside of the sleeve 610 and the top plate 620. The bracket 600 composed of the sleeve 610 and the top plate 620 is adapted to the shape of the outer shell 200, supporting and fixing the shape and position of the heat insulation cotton 300.

[0048] In this embodiment, there are both multi-layer brackets 600 distributed circumferentially around the outer shell 200 between the heat insulation cotton 300 and the outer shell 200, and brackets 600 of the contour of the outer shell 200 composed of the sleeve 610 and the top plate 620. To ensure that the second cavity 310 between the heat insulation cotton 300 and the outer shell 200 can be filled with a liquid medium, without changing the nature of the heat insulation cotton 300 itself, by using the structural cooperation between the bracket 600 and the outer shell 200, the forming and sealing of the second cavity 310 and the coverage range of the heat insulation cotton 300 can be achieved.

[0049] In this embodiment, the coverage area of the thermal insulation cotton 300 is the side wall and the top of the outer shell 200. Only the support 600 is connected to the bottom of the outer shell 200 to seal the bottom of the second cavity 310. Thus, the power line 110 directly passes through the bottom of the outer shell 200 from the outside and enters the first cavity 210 to be connected to the heating component 100 to supply power to the heating component 100. There is no complex structure in the connection path of the power line 110, reducing the positions for sealing treatment and simplifying the structure.

[0050] According to an embodiment provided by the present invention, a second opening 330 is provided at the bottom of the second cavity 310. In this embodiment, the coverage area of the thermal insulation cotton 300 is the side wall and the top of the outer shell 200. Only the support 600 is connected to the bottom of the outer shell 200 to seal the bottom of the second cavity 310. Thus, the second opening 330 is provided on the support 600 located at the bottom of the second cavity 310. The second opening 330 communicates with the second cavity 310, and the liquid medium in the second cavity 310 can be discharged.

[0051] In this embodiment, a corresponding valve body can also be provided for the second opening 330. When it is necessary to discharge the liquid medium, the valve body is opened, and when liquid discharge is no longer required, the valve body is closed. The liquid medium discharged from the second opening 330 can also be recycled to the liquid inlet pipe 400 and flow into the second cavity 310 or the first cavity 210 again to realize the circulation of the liquid, saving energy and being environmentally friendly, and at the same time providing convenience for the maintenance of the device.

[0052] The air conditioner provided by the present invention will be described below. The air conditioner described below can be correspondingly referred to the electric heating device described above.

[0053] An embodiment of the present invention further provides an air conditioner, including the electric heating device as described in the above embodiment.

[0054] For the air conditioner of the embodiment of the present invention, the electric heating device in the air conditioner can achieve the highest efficiency of water temperature heating while ensuring a relatively high watt density, and can avoid the thermal insulation cotton 300 catching fire due to excessive temperature, ensuring that the thermal insulation cotton 300 can play a better heat preservation effect.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electric heating device, characterized in that, It includes a heating component (100), a housing (200) and a heat insulating cotton (300). A first cavity (210) is provided inside the housing (200), the heating component (100) is arranged in the first cavity (210), the heat insulating cotton (300) is disposed around the outside of the housing (200), and the wiring terminal of the heating component (100) is connected to a power line (110) through a fusing component (140), and the fusing component (140) is located in the first cavity (210).

2. The electric heating device according to claim 1, wherein The fusing component (140) includes a first fuse wire (141) and a second fuse wire (142). The neutral line (111) end of the heating component (100) is connected to the neutral line (111) of the power line (110) through the first fuse wire (141), and the live line (112) end of the heating component (100) is connected to the live line (112) of the power line (110) through the second fuse wire (142).

3. The electric heating device according to claim 1, characterized in that, The fusing component (140) is connected to the power line (110) through a cold end (150).

4. The electric heating device according to any one of claims 1 to 3, characterized in that A second cavity (310) is formed between the heat insulating cotton (300) and the housing (200).

5. The electric heating device according to claim 4, characterized in that, It further includes a liquid inlet pipe (400) and a liquid outlet pipe (500). Both the liquid inlet pipe (400) and the liquid outlet pipe (500) are communicated with the first cavity (210), and the position of the liquid inlet pipe (400) is lower than that of the liquid outlet pipe (500).

6. The electric heating device according to claim 5, characterized in that, A first opening (410) is provided on the pipe section of the liquid inlet pipe (400) passing through the second cavity (310), and a valve body is provided at the first opening (410), and the valve body is adapted to control the on-off between the first opening (410) and the second cavity (310).

7. The electric heating device according to claim 4, characterized in that, A first exhaust valve (320) is provided at the top of the second cavity (310).

8. The electric heating device according to claim 4, characterized in that, A second exhaust valve (220) is provided at the top of the first cavity (210).

9. The electric heating device according to claim 4, characterized in that It further includes a bracket (600). The bracket (600) is arranged between the housing (200) and the heat insulating cotton (300) to support the heat insulating cotton (300).

10. The electric heating device according to claim 9, characterized in that, The bracket (600) includes a sleeve (610) and a top plate (620). The sleeve (610) is sleeved outside the side wall of the housing (200), the top plate (620) is arranged outside the top of the housing (200) and is connected to the sleeve (610), and the heat insulating cotton (300) covers the outer walls of the sleeve (610) and the top plate (620).

11. The electric heating device according to claim 10, wherein, A second opening (330) is provided at the bottom of the second cavity (310).

12. An air conditioner, characterized in that, It includes the electric heating device according to any one of claims 1 to 11.

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