WO2018040222A1

WO2018040222A1 - Instantaneous electric water heater housing and instantaneous electric water heater

Info

Publication number: WO2018040222A1
Application number: PCT/CN2016/101195
Authority: WO
Inventors: 徐来喜
Original assignee: 芜湖美的厨卫电器制造有限公司; 美的集团股份有限公司
Priority date: 2016-08-31
Filing date: 2016-09-30
Publication date: 2018-03-08

Abstract

Disclosed are an instantaneous electric water heater housing (100) and an instantaneous electric water heater (1000). The instantaneous electric water heater housing (100) comprises: a rear shell (110), a side wall of the rear shell (110) being provided with a projection (111) projecting outwards; and a front shell (120), the front shell (120) being connected to the rear shell (110), and a free end face of the projection (111) bearing against a side wall of the front shell (120).

Description

Fast-heating electric water heater housing and fast-heating electric water heater

Technical field

The invention belongs to the technical field of waterproofing of water heater casings, in particular to a quick-heating electric water heater casing and a quick-heating electric water heater having the shell of the fast-heating electric water heater.

Background technique

In the related art, the front and rear shells of some fast-heating electric water heaters are connected by a plurality of (for example, four circumferential) threaded fasteners, and the heat-resistant electric water heater housings are mostly IPX4. Poor waterproof performance, can only prevent splashing water; some fast-heating electric water heaters have a sealing groove between the front and rear shells, and a sealing ring is arranged in the sealing groove, which requires the front and rear shells. A plurality of (more than four) screw fastenings are provided in the circumferential direction, which complicates the assembly of the quick-heat electric water heater housing, and there is room for improvement.

Summary of the invention

The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, it is an object of the present invention to provide a rapid-heating electric water heater housing having a high waterproof rating.

Another object of the present invention is to provide a fast-heating electric water heater having the above-described fast-heating electric water heater casing.

A rapid-heating electric water heater casing according to an embodiment of the first aspect of the present invention includes: a rear casing having a convex portion protruding outwardly on a side wall of the rear casing; a front casing, the front casing and the The back shells are connected, and the free end faces of the bosses abut against the side walls of the front case.

Fast-heating electric water heater casing, fast-heating electric water heater casing according to the first aspect of the present invention The high waterproof rating ensures the safety of the user and does not require excessive screw fasteners to be tightened. The assembly of the quick-heating electric water heater housing is convenient, and the high-heat electric water heater housing has high strength and rigidity.

In addition, the rapid-heating electric water heater casing according to the above embodiment of the present invention may further have the following additional technical features:

In some preferred embodiments of the present invention, the plurality of protrusions are plural, and the plurality of protrusions are spaced apart in the front-rear direction.

Specifically, the spacing between the adjacent raised portions is L, which satisfies: 3 mm ≤ L ≤ 8 mm.

Preferably, the height of the convex portion is H, which satisfies: 2 mm ≤ H ≤ 6 mm.

Preferably, the height of the plurality of raised portions increases in order from front to back.

Preferably, a height difference between one of the plurality of the convex portions and the adjacent convex portion is ΔH1, and a height difference between the other adjacent convex portions is ΔH2, which satisfies: ΔH1>ΔH2.

Specifically, it satisfies: 1 mm ≤ ΔH1 ≤ 2 mm, and 0.3 mm ≤ ΔH2 ≤ 0.6 mm.

Preferably, the raised portion extends along a left side wall, an upper side wall and a right side wall of the rear case.

Further, the upper side wall of the front case is provided with a hook, and the hook is disposed between the foremost one of the plurality of the protrusions and the adjacent one.

Specifically, a limiting plate is further disposed on the upper sidewall of the front case, and a frontmost one of the plurality of the protruding portions is located between the hook and the limiting plate.

Further, the left side wall and the right side wall of the front case are respectively provided with a card slot which is open rearward, and the foremost one of the plurality of the bosses is provided with a positioning plate corresponding to the mounting groove.

Further, the rear case and the front case are connected by a threaded fastener, and the threaded fastener is connected to a lower side wall of the front case and a lower side wall of the rear case.

Preferably, the side wall of the front case has a step portion that abuts a free end face and a front surface of one of the last ones of the plurality of the bosses.

In some preferred embodiments of the invention, the free end face of the raised portion is configured as a bevel that slopes from front to back in a direction away from the root of the raised portion.

A rapid-heating electric water heater according to a second aspect of the present invention, comprising the fast-heating electric water heater casing according to any one of the first aspects.

The fast-heating electric water heater and the above-mentioned fast-heating electric water heater housing have the same advantages as those of the prior art, and are not described herein again.

DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is an exploded view of a housing of a rapid-heat electric water heater according to an embodiment of the present invention;

2 is a longitudinal cross-sectional view of a housing of a rapid-heat electric water heater according to an embodiment of the present invention;

Figure 3 is a partial cross-sectional view taken along line A in Figure 2;

4 is a transverse cross-sectional view of a housing of a rapid-heating electric water heater in accordance with an embodiment of the present invention;

Figure 5 is a partial cross-sectional view of the portion B in Figure 4;

Figure 6 is a partial schematic view of the top of a front case in accordance with an embodiment of the present invention.

Reference mark:

Fast-heating electric water heater 1000, fast-heating electric water heater casing 100, rear casing 110, bosses 111 (111a, 111b, 111c), guide groove 112, positioning plate 113, front casing 120, step portion 121, card Hook 122, limiting plate 123, card slot 124, threaded fastener 130.

detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments.

A rapid-heating electric water heater 1000 according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1 to FIG. 5, the fast-heating electric water heater 1000 includes a quick-heating electric water heater casing 100 and components disposed in the quick-heating electric water heater casing 100, and the quick-heating electric water heater casing 100 can be The components play the role of isolation protection, and the waterproof rating of the fast-heating electric water heater directly affects its safety.

The quick-heating electric water heater housing 100 includes a rear case 110 and a front case 120. The side wall of the rear case 110 is provided with an outwardly convex protrusion 111, and the front case 120 is connected to the rear case 110. When fastened outside the rear case 110, the free end surface of the boss portion 111 abuts against the inner surface of the side wall of the front case 120, and when the water flows toward the quick-heating electric water heater case 100, the boss portion 111 can be isolated The convex portion 111 can be integrally formed with the rear case 110 by the action of the water flow.

There may be a plurality of convex portions 111, and a plurality of convex portions 111 are spaced apart in the front-rear direction, and a plurality of convex portions are provided. The starting portion 111 can serve as a multi-stage waterproofing. Optionally, the spacing between the adjacent raised portions 111 is L, L can satisfy: 3 mm ≤ L ≤ 8 mm, so that the rear case 110 can be easily drafted during manufacture. .

Preferably, the heights of the plurality of convex portions 111 are sequentially increased from front to back, and the outermost water flow is strongest, and the heights of the plurality of convex portions 111 are set to increase from front to back, and the convex portion 111 can be enhanced. The water property, and the rear case 110 is easy to be drafted and implemented while resting on the mold. Of course, in other alternative embodiments, the heights of the plurality of bosses 111 may also be set to be the same. The height of the convex portion 111 is H, which satisfies: 2 mm ≤ H ≤ 6 mm, and the difference in height between the last convex portion 111 of the plurality of convex portions 111 and the adjacent convex portion 111 is ΔH1, and other phases The height difference between the adjacent convex portions 111 is ΔH2, which satisfies: ΔH1>ΔH2, that is, the height difference between the rearmost convex portion 111 and the second convex portion 111 from the rear to the front is the largest, The difference in height between the other adjacent convex portions 111 is relatively small, specifically, 1 mm ≤ ΔH1 ≤ 2 mm, and 0.3 mm ≤ ΔH2 ≤ 0.6 mm.

Referring to FIG. 3 and FIG. 5, a flow guiding groove 112 may be formed between two adjacent convex portions 111, and the guiding groove 112 may function as a flow guiding, and the convex portion 111 may be along the rear housing 110. The left side wall, the upper side wall and the right side wall extend, that is, the lower side wall of the rear case 110 may not have a convex portion 111, and the convex portion 111 may have a mouth shape open at the lower end, and is led out from the flow guiding groove 112. The water can flow out from below. Specifically, the convex portion 111 may be three, and the present invention is further described by taking only three convex portions 111 as an example, but does not indicate the convex portion of the rapid-heat electric water heater casing 100 of the present invention. The number of 111 is limited to only three. For convenience of description, the three raised portions 111 are numbered 111a, 111b, and 111c in order from the back to the front.

When the water flow is sprayed toward the quick-heat electric water heater casing 100, the convex portion 111a functions as the first-stage protection, and most of the water flow is isolated by the convex portion 111a and flows along the outer peripheral wall of the rear casing 110. There may be a small amount of water intruding through the gap between the side wall of the front case 120 and the boss portion 111a, and the boss portion 111b functions as a second level of protection, and most of these invading water are raised. Part 111b Isolated, and flowing out along the flow guiding groove 112 between the convex portion 111a and the convex portion 111b, a very small amount of water may penetrate through the gap between the side wall of the front case 120 and the convex portion 111b, and the convex portion 111c The third stage of protection acts, and the invading water is blocked by the boss 111c and flows out along the guide groove 112 between the boss 111b and the boss 111c.

After testing, the waterproofing effect of the fast-heating electric water heater casing 100 of the embodiment of the invention can reach IP25, and can provide a full range of 2 minutes to 3 minutes under the impact of a flow rate of 12.5 L/s and a pressure of 30 n/m. Waterproof protection.

According to the fast-heating electric water heater casing 100 according to the embodiment of the present invention, by providing the boss portion 111 on the rear casing 110, water can be prevented from intruding from the gap between the front casing 120 and the rear casing 110, and the quick-heating electric water heater casing 100 has a high waterproof rating (up to IP25), especially for fast-heating electric water heaters, which can prevent the electrical components inside the fast-heating electric water heater housing 100 from getting wet, ensuring the safety of the user without excessive The threaded fastener 130 is tightened, and the quick-heating electric water heater housing 100 is easily assembled, and the boss 111 can also enhance the strength and rigidity of the rear shell 110.

According to the fast-heating electric water heater 1000 of the embodiment of the invention, the quick-heating electric water heater 1000 has a small appearance gap, high waterproof level, good safety performance, low failure rate, and is convenient for maintenance and disassembly.

In some preferred embodiments of the present invention, referring to FIGS. 3 and 5, the free end surface of the boss portion 111 (the end portion away from the root portion) may be configured to be inclined from the front to the rear toward the direction away from the root of the boss portion 111. The bevel is such that the sealing effect between the side wall of the front case 120 and the boss 111 can be improved.

Preferably, the side wall of the front case 120 may have a step portion 121, and the step portion 121 may stop against the free end surface and the front surface of the last one of the plurality of protrusion portions 111, with reference to FIG. 3 and FIG. The free end face and the front face of the 111a respectively abut against the two surfaces of the step portion 121 to function as a water retaining member from two substantially perpendicular directions.

In some preferred embodiments of the present invention, referring to FIG. 5, the left and right side walls of the front case 120 Each of the plurality of raised portions 111 (the raised portion 111c in FIG. 5) may be provided with a positioning plate 113 corresponding to the mounting groove, and the positioning plate 113 may be provided. The front surface of the boss portion 111c protrudes forwardly, and the positioning plate 113 is inserted into the card slot 124. When the front case 120 and the rear case 110 are mounted, the cooperation of the positioning plate 113 and the card slot 124 can function as a positioning.

Referring to FIG. 3 and FIG. 6, the upper side wall of the front case 120 may be provided with a hook 122. The hook 122 may be disposed between the foremost one of the plurality of protrusions 111 and the adjacent one, and the hook 122 The front case 120 can be prevented from moving forward. The upper side wall of the front case 120 can also be provided with a limiting plate 123. The foremost one of the plurality of raised portions 111 (the raised portion 111c) can be located at the hook 122. Between the limiting plates 123, the limiting plate 123 is used to prevent the front housing 120 from moving backward, and the engagement of the hook 122 with the limiting plate 123 can define the upper side wall of the front housing 120 in the front-rear direction.

Optionally, the hook 122 and the limiting plate 123 may be in a plate shape, wherein the hook 122 may be a long strip shape, the limiting plate 123 may be a plurality of, and the plurality of limiting plates 123 are spaced apart in the left-right direction. The rear case 110 and the front case 120 may be connected by a threaded fastener 130, and the threaded fastener 130 is connected to the lower side wall of the front case 120 and the lower side wall of the rear case 110, referring to FIG. 2, the rear case 110 and the front case The connection can be made by only one threaded fastener 130, and the assembly of the quick-heating electric water heater housing 100 is extremely convenient.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", " Orientation or positional relationship of the indications of the "outer", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplified description, and does not indicate or imply that the device or component referred to has The specific orientation, construction and operation in a particular orientation are not to be construed as limiting the invention.

Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

Claims

A fast-heating electric water heater housing, comprising:

a rear shell, the side wall of the rear shell is provided with a convex portion protruding outward;

a front case, the front case being connected to the rear case, and a free end face of the boss portion abutting against a side wall of the front case.
The rapid-heating electric water heater casing according to claim 1, wherein the plurality of convex portions are plural, and the plurality of convex portions are spaced apart in the front-rear direction.
The rapid-heating electric water heater casing according to claim 2, wherein a spacing between the adjacent convex portions is L, which satisfies: 3 mm ≤ L ≤ 8 mm.
The rapid-heating electric water heater casing according to claim 2, wherein the height of the convex portion is H, which satisfies: 2 mm ≤ H ≤ 6 mm.
A rapid-heating electric water heater casing according to claim 2, wherein a height of said plurality of said bosses increases in order from front to back.
The rapid-heating electric water heater casing according to claim 5, wherein a difference in height between the last one of the plurality of convex portions and the adjacent convex portion is ΔH1, and the like The height difference between adjacent convex portions is ΔH2, which satisfies: ΔH1 > ΔH2.
The rapid-heating electric water heater casing according to claim 6, wherein: 1 mm ≤ ΔH1 ≤ 2 mm, and 0.3 mm ≤ ΔH2 ≤ 0.6 mm.
A rapid-heating electric water heater casing according to any one of claims 2 to 7, wherein the convex portion extends along left side walls, upper side walls and right side walls of the rear case.
The quick-heating electric water heater casing according to claim 8, wherein the upper side wall of the front casing is provided with a hook, and the hook is disposed at the forefront of the plurality of the convex portions. One between the adjacent one.
The quick-heating electric water heater casing according to claim 9, wherein the upper side wall of the front casing is further provided with a limiting plate, and the foremost one of the plurality of convex portions is located at the card Between the hook and the limit plate.
The rapid-heating electric water heater casing according to claim 8, wherein the left side wall and the right side wall of the front casing are provided with a card slot which is open toward the rear, and a plurality of the convex portions are The foremost one is provided with a positioning plate corresponding to the mounting groove.
A rapid-heating electric water heater casing according to claim 8, wherein said rear casing and said front casing are connected by a threaded fastener, and said threaded fastener and said lower side of said front casing The wall is connected to the lower side wall of the rear case.
The rapid-heating electric water heater casing according to any one of claims 2 to 12, wherein a side wall of the front casing has a step portion, and the step portion abuts the plurality of the boss portions The free end face and front surface of one of the last squares.
The rapid-heating electric water heater casing according to any one of claims 1 to 13, characterized in that the free end surface of the convex portion is configured to be inclined from front to back toward a direction away from a root of the convex portion The slope.
A rapid-heating electric water heater characterized by having the rapid-heating electric water heater casing according to any one of claims 1-14.