CN213300469U - Positive displacement water heater and water inlet pipe thereof - Google Patents

Abstract

The utility model discloses a positive displacement water heater and inlet tube thereof, the inlet tube is arranged in at least part setting in the inner bag, the inlet tube includes: the water inlet pipe comprises a pipe body, wherein the pipe body is provided with a water inlet end and a water outlet end along the water flow direction, the water outlet end faces the bottom or the side part of the inner container, the water inlet end is provided with a water inlet, the side wall of the water outlet end is provided with at least one first opening, the end face of the water outlet end is provided with at least one second opening, and the first opening and the second opening form a water outlet of the water inlet pipe. The utility model provides a positive displacement water heater and inlet tube thereof can improve hot water productivity.

Description

Positive displacement water heater and water inlet pipe thereof

Technical Field

The utility model relates to an electrical apparatus technical field, in particular to positive displacement water heater and inlet tube thereof.

Background

The positive displacement water heater is a hot water heating device provided with an inner container. The positive displacement water heater is generally classified into a positive displacement electric water heater and a positive displacement gas water heater. The container type water heater can store hot water in the inner container for a long time or temporarily.

When the water storage volume of the inner container is relatively large (the water storage volume is more than 300L generally), the rated heat load of the water heater can reach 99 kW. The positive displacement water heater with a larger rated heat load can be applied to commercial applications, such as high-grade houses, apartments, restaurants, schools, hotels, factories, commercial offices, hospitals, entertainment and leisure places and the like, so that the requirement of a large amount of continuous and comfortable water can be met.

When the positive displacement water heater is stopped once, the more hot water stored in the inner container (namely, the higher the hot water production rate), the lower the starting and stopping frequency of the machine is, and the more hot water can be discharged. The improvement of the hot water yield of the water heater is beneficial to prolonging the service life of the product and improving the comfort of the user. Particularly when the positive displacement water heater is used in commercial applications, the need for improved hot water production rates is even more acute.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a technical problem that will solve provides a positive displacement water heater and inlet tube thereof, and it can improve hot water productivity.

The embodiment of the utility model provides a concrete technical scheme is:

an inlet conduit for being at least partially disposed within a bladder, the inlet conduit comprising: the water inlet pipe comprises a pipe body, wherein the pipe body is provided with a water inlet end and a water outlet end along the water flow direction, the water outlet end faces the bottom or the side part of the inner container, the water inlet end is provided with a water inlet, the side wall of the water outlet end is provided with at least one first opening, the end face of the water outlet end is provided with at least one second opening, and the first opening and the second opening form a water outlet of the water inlet pipe.

Furthermore, the first opening is a notch with a preset length, the first opening penetrates through the end face of the water outlet end along the side wall, and the first opening is communicated with the second opening.

Further, the ratio of the preset length of the notch to the diameter of the inner wall of the pipe body is 1: 4-3: 4.

Further, the ratio of the open pore surface area formed by the notch in the preset length range to the total surface area of the pipe body in the preset length range is between 0.2 and 0.7.

Furthermore, the water inlet end and the water outlet end are respectively arranged at the top end and the bottom end of the water inlet pipe, the inner container is provided with a top part close to the top end and a bottom part close to the bottom end, the notch is provided with a highest position far away from the bottom end, and the distance from the highest position to the bottom part is 13-30 mm.

Furthermore, the number of breach is a plurality of, and a plurality of breach is along the circumferencial direction evenly interval distribution of body.

Further, the notch is rectangular.

Further, the gap is any one or combination of the following: triangle, trapezoid, arc.

A positive displacement water heater comprising: the inner bag, above-mentioned arbitrary inlet tube, the play water end of inlet tube set up in the inner bag.

Further, the water inlet pipe is at least partially longitudinally arranged in the inner container.

Further, the positive displacement water heater also comprises a heat exchange device.

Further, the positive displacement water heater comprises a positive displacement gas water heater, and the heat exchange device comprises a heat exchange smoke tube.

The technical scheme of the utility model following beneficial effect that is showing has:

through carrying out configuration improvement to the play water end of inlet tube, there is first opening and second opening to form the delivery port, has increased the cross-sectional area of the rivers that get into the inner bag, has reduced the speed of the rivers that get into the inner bag to reduced the disturbance of the rivers that get into the inner bag to hot water in the inner bag, reduced the mixing as far as possible and gone into the cold water volume of hot water in the inner bag, let cold water distribute and more concentrate on the inner bag lower part, and then improved hot water yield.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for helping the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. The skilled person in the art can, under the teaching of the present invention, choose various possible shapes and proportional dimensions to implement the invention according to the specific situation.

Fig. 1 is a schematic structural diagram of a water inlet pipe provided in an embodiment of the present application;

FIG. 2 is a schematic view of a water inlet tube near the water outlet end according to an embodiment of the present disclosure;

FIG. 3 is a bottom view of a water intake riser provided in an embodiment of the present application;

FIG. 4 is a schematic structural view of another water intake riser provided in an embodiment of the present application;

FIG. 5 is a graph showing the relationship between the ratio of the predetermined length of the notch to the inner diameter of the pipe body and the hot water yield;

FIG. 6 is a graph of the ratio of the open area of the open section to the total open section surface area versus hot water production;

fig. 7 is a schematic structural diagram of a positive displacement water heater provided in an embodiment of the present application.

Reference numerals of the above figures:

1. a water inlet pipe; 11. a water inlet end; 12. a water outlet end; 121. a first opening; 122. a second opening; 2. an inner container; 3. a heat exchange smoke pipe.

Detailed Description

The technical solution of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments, it should be understood that these embodiments are only used for illustrating the present invention and are not used for limiting the scope of the present invention, and after reading the present invention, the modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the claims attached to the present application.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 4, in the embodiments of the present disclosure, a water inlet pipe 1 is provided, and the water inlet pipe 1 is configured to be at least partially disposed in an inner container 2. The water inlet pipe 1 includes: a tube body. The tube body has a water inlet end 11 and a water outlet end 12 along the direction of water flow. The water outlet end 12 faces the bottom or the side of the inner container 2. The water inlet end 11 is provided with a water inlet. At least one first opening 121 is arranged on the side wall of the water outlet end 12, at least one second opening 122 is arranged on the end surface of the water outlet end 12, and the first opening 121 and the second opening 122 form the water outlet of the water inlet pipe 1.

In this embodiment, the water inlet pipe 1 is adapted to be at least partially arranged in the liner 2. The inner container 2 can be an inner container 2 of a water heater, and of course, the inner container 2 can also be an inner container 2 of other electric appliances needing water storage. In the embodiment of the present specification, the inner container 2 is mainly exemplified by the inner container 2 of the water heater, and other application scenarios can be referred to the present application by analogy.

The water intake pipe 1 may be a longitudinally extending pipe as a whole. Of course, the water inlet pipe 1 may be configured in any other shape according to the actual application requirement, for example, in the embodiment of the present application, the inner diameter of the pipe body may be constant along the extending direction thereof, and the inner diameter may also vary along the extending direction, and the present application is not limited specifically herein. The body of the inlet tube 1 has an inlet end 11 and an outlet end 12 in the direction of the water flow. Wherein, the water inlet end 11 can be arranged outside the inner container 2 and is used for connecting with an external water supply pipeline. The side close to the water outlet end 12 extends into the inner container 2. The heated water in the inner container 2 has a stratification effect, and the water temperature decreases layer by layer from top to bottom along the height direction.

In this embodiment, the outlet end 12 of the inlet tube 1 faces the bottom or side of the inner container 2. Generally, the liner 2 of the water heater can be divided into a horizontal liner and a vertical liner. In particular, for commercial positive displacement water heaters having a relatively large volume and a relatively high thermal load, a vertical liner is generally used. It should be noted that, for the liner 2 itself or the water inlet pipe 1 itself, when it is installed specifically, it may have a certain inclination angle, so that no matter it is a vertical liner or a horizontal liner, the extending direction of the water inlet pipe 1 may have a certain angle with the horizontal direction or the vertical direction. The specific value of the angle can be adaptively designed according to the actual structure of the liner 2 and the water inlet pipe 1 and the specific installation scheme, and the application is not specifically limited herein.

In this embodiment, as shown in fig. 2, the side wall of the inlet tube 1 near the water outlet end 12 may be provided with a first opening 121. Specifically, the first opening 121 may be a plurality of openings that are not communicated in the axial direction and the circumferential direction and are disposed on the side wall, or may be a plurality of slots that are communicated in the axial direction toward the water outlet end 12, and of course, the first opening 121 may also be in other opening forms for water outlet. The end surface of the water outlet end 12 of the water inlet pipe 1 may also be provided with a second opening 122, and the second opening 122 may be a full circle hole formed at the water outlet end 12 and having the same inner diameter as the pipe body of the water inlet pipe 1, or may be an opening smaller than the inner diameter of the pipe body of the water inlet pipe 1, or a plurality of openings which are not communicated in the radial direction.

In the embodiment of the application, through carrying out configuration improvement to the play water end 12 of inlet tube 1, there are first opening 121 and second opening 122 to form the delivery port, increased the cross-sectional area of the rivers that get into inner bag 2, reduced the speed of the rivers that get into inner bag 2 to reduce the rivers that get into inner bag 2 and to hot-water disturbance in inner bag 2, reduced the mixing as far as possible and gone into hydrothermal cold water volume in inner bag 2, and then improved hot water yield.

In one embodiment, the first opening 121 is a notch with a predetermined length, the first opening 121 penetrates through the end surface of the water outlet end 12 along the side wall, and the first opening 121 is communicated with the second opening 122.

In this embodiment, the first opening 121 may be a notch with a predetermined length penetrating the end surface of the water outlet end 12 along the side wall, so as to directly communicate with the second opening 122. When the first opening 121 is communicated with the second opening 122, the cross-sectional area of the water flow entering the inner container 2 is increased, and the speed of the water flow entering the inner container 2 is reduced.

When the first opening 121 is in the form of a notch, the predetermined length of the notch may be the length of the first opening 121 in the direction extending from the water outlet end 12 to the water inlet end 11. The ratio of the preset length of the notch to the diameter of the inner wall of the pipe body is 1:4 to 3: 4.

The longer the preset length of the notch is, the larger the notch is, namely the water inlet area can be increased, and the reduction of the water inlet flow speed is facilitated; however, the longer the gap, the earlier the cold water entering through the inlet pipe 1 enters the inner container 2, resulting in more cold water being mixed into the hot water of the inner container 2. It is therefore desirable to reasonably control the predetermined length of the gap. For the inlet pipe 1, when the water pressure is constant, the flow rate into the inlet pipe 1 is also constant. After the diameter (inner diameter for short) of the inner wall of the pipe body is reasonably controlled, the water inlet speed in the water inlet pipe 1 is constant. Referring to fig. 5, the abscissa is the ratio of the predetermined length of the notch to the inner diameter of the pipe, and the ordinate is the corresponding hot water yield. When the ratio of the preset length of the notch to the inner diameter of the pipe body is 1:4 to 3:4, the corresponding hot water yield is high.

In this embodiment, through the proportion of the internal diameter of reasonable control this predetermined length of breach and body, can rationally control the velocity of flow of intaking that flows into inner bag 2 from inlet tube 1 in lower speed range to reduce the disturbance of intaking to water in inner bag 2, let cold water distribute and more concentrate on the inner bag lower part, improve hot water productivity.

In an embodiment, when the number of breach be a plurality of, a plurality of breach evenly spaced apart along the circumferencial direction of body distributes, and a plurality of breach of interval evenly distributed are favorable to guaranteeing the stable even outflow all around to inlet tube 1 of rivers on the circumferencial direction to reduce into hot water's in to inner bag 2 disturbance as far as possible.

As shown in fig. 1, 2 and 3, the notch is rectangular. When the gap is rectangular, a rectangular interval part is formed between two adjacent gaps. In order to reduce the disturbance of the cold water entering the inner container 2 from the water inlet pipe 1 to the water in the inner container 2 as much as possible, the circumferential side of the interval part can be provided with a circular arc transition.

Furthermore, the notch may be any one or a combination of the following: triangle, trapezoid, arc. As shown in fig. 4, the notch may be triangular in shape. When the notches are triangular, the interval part between two adjacent notches is also triangular, and a plurality of notches form a sawtooth shape in the circumferential direction. Of course, when the notch may have the shape exemplified above, the shape may be adapted and combined according to actual requirements, and the application is not limited specifically herein.

In one embodiment, the ratio of the surface area of the opening formed by the notch in the predetermined length range to the total surface area of the tube in the predetermined length range is between 0.2 and 0.7.

In this embodiment, the ratio of the open surface area of the notch to the total surface area of the pipe body is controlled in a reasonable manner over a predetermined length, so that the inflow area is increased and the inflow velocity is reduced. When the ratio is too small, the size of the notch is small, on one hand, the notch with the small size has small influence on increasing the water inlet area and reducing the water inlet flow speed, and on the other hand, the notch with the small size can instantaneously accelerate the water flow passing through the notch. When the ratio is too large, the size of the space between two adjacent notches is small, and the strength is liable to be insufficient. Therefore, the ratio must not be too large in order to ensure the reliability of the gap between two adjacent notches during use. As shown in fig. 6, the abscissa represents the ratio of the open area of the open section to the total surface area of the open section, and the ordinate represents the corresponding hot water production rate. When the ratio of the open area of the open section to the total open section surface area is between 0.2 and 0.7, the corresponding hot water yield is higher.

In one embodiment, the water inlet end 11 and the water outlet end 12 are respectively arranged at the opposite top end and the bottom end of the water inlet pipe 1, the liner 2 has a top part close to the top end and a bottom part close to the bottom end, the gap has a highest position far away from the bottom end, and the distance from the highest position to the bottom part is 13 mm to 30 mm.

In the present embodiment, the water inlet pipe 1 is used in a vertical liner as an example. For a vertical liner, it has opposing top and bottom portions. Considering that the heated water in the inner container 2 has a stratification effect, the temperature decreases layer by layer from top to bottom along the height direction, in order to reduce the disturbance of the inlet water to the hot water in the inner container 2 as much as possible, the outlet end 12 of the inlet pipe 1 is located at a position close to the bottom of the inner container 2 while controlling the distance between the outlet end 12 and the bottom of the inner container 2, and specifically, the distance from the highest position of the gap far from the bottom end to the bottom can be set between 13 mm and 30 mm. When the distance is too large, it means that the inlet water height entering the inner container 2 from the inlet pipe 1 is high, and cold water is more mixed into the hot water in the inner container 2, thereby causing the decrease of the hot water yield; when the distance is too small, it means that the water level entering the inner container 2 from the water inlet pipe 1 meets the bottom, which may accelerate the water velocity at the water outlet end 12, and may cause increased disturbance to the water in the inner container 2. And through experimental verification, when this interval is in between above-mentioned scope, the position that the rivers that flow from inlet tube 1 entered inner bag 2 is comparatively reasonable, and the velocity of flow of rivers is less, and is less to the disturbance of inner bag 2 normal water.

Referring to fig. 7, the present specification further provides a positive displacement water heater, which may include: a liner 2, and a water inlet pipe 1 provided in the above embodiments, wherein a water outlet end 12 of the water inlet pipe 1 is disposed in the liner 2.

In the present embodiment, based on the inlet pipe 1 provided in the above embodiments, the present application also provides a positive displacement water heater provided with an inner tank 2 and the inlet pipe 1. The matching relationship between the water inlet pipe 1 and the inner container 2, the specific structural improvement of the water inlet pipe 1, the technical effects brought by the improvement and the like can refer to the specific description of the above embodiments, and the details are not repeated herein.

In one embodiment, the water inlet tube 1 is at least partially longitudinally arranged in the liner 2. As shown in FIG. 5, generally, the water inlet end 11 of the water inlet pipe 1 is located outside the liner 2, and the main body pipe section and the water outlet end 12 of the water inlet pipe 1 are located in the liner 2.

The liner 2 of the water heater can be divided into a horizontal liner and a vertical liner. In particular, for commercial positive displacement water heaters having a relatively large volume and a relatively high thermal load, a vertical liner is generally used. It should be noted that, for the liner 2 itself or the water inlet pipe 1 itself, when it is installed specifically, it may have a certain inclination angle, so that no matter it is a vertical liner or a horizontal liner, the extending direction of the water inlet pipe 1 may have a certain angle with the horizontal direction or the vertical direction. The specific value of the angle can be adaptively designed according to the actual structure of the liner 2 and the water inlet pipe 1 and the specific installation scheme, and the application is not specifically limited herein.

The positive displacement water heater also comprises a heat exchange device which is used for heating the water in the inner container 2. Specifically, the heat exchange device can be set in different forms according to different heating modes of the water heater.

For example, when the positive displacement water heater is a positive displacement gas water heater, the heat exchange device comprises a heat exchange smoke tube 3. The heat exchange smoke tube 3 can be arranged in the middle of the inner container 2. High-temperature flue gas generated during combustion of the fuel gas can transfer heat to the water in the inner container 2 in the process of flowing through the heat exchange smoke pipe 3.

In a specific application environment, when the water inlet pipe 1 provided in the present specification is applied to a commercial positive displacement gas water heater as shown in fig. 7, it is found that, when the side of the existing water inlet pipe 1 has no opening, the water inlet pipe 1 has: after getting into the cold water of the same volume, be provided with this application in the inner bag 2 of inlet tube 1 after improving, its cold water face position is lower, and the temperature at top is higher, and the hot water volume is more, and hot water productivity is higher. For the outlet end of the water inlet pipe 1, the improved inlet water is dispersed, the transverse velocity distribution is more, the vortex is smaller, and the disturbance to the hot water in the inner container 2 is smaller.

It should be noted that, in the description of the present application, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no precedence between the two is intended or should be construed to indicate or imply relative importance. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.

The above embodiments in the present specification are all described in a progressive manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment is described with emphasis on being different from other embodiments.

The above embodiments are only embodiments of the present invention, and although the embodiments of the present invention are disclosed as above, the contents are only embodiments adopted for facilitating understanding of the present invention, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (12)

1. An inlet conduit for being at least partially disposed within a bladder, the inlet conduit comprising: the water inlet pipe comprises a pipe body, wherein the pipe body is provided with a water inlet end and a water outlet end along the water flow direction, the water outlet end faces the bottom or the side part of the inner container, the water inlet end is provided with a water inlet, the side wall of the water outlet end is provided with at least one first opening, the end face of the water outlet end is provided with at least one second opening, and the first opening and the second opening form a water outlet of the water inlet pipe.

2. The water inlet tube of claim 1 wherein the first opening is a notch of a predetermined length, the first opening extends through the end surface of the outlet end along the sidewall, and the first opening communicates with the second opening.

3. The water intake riser of claim 2 wherein the ratio of the predetermined length of the indentation to the diameter of the inner wall of the tubular body is between 1:4 and 3: 4.

4. The water intake riser according to claim 3, wherein the ratio of the open surface area of the openings formed by the indentations over the predetermined length to the total surface area of the tubular body over the predetermined length is between 0.2 and 0.7.

5. The water inlet tube according to claim 2 or 3, wherein said water inlet end and said water outlet end are disposed at opposite top and bottom ends of said water inlet tube, respectively, said inner bladder has a top portion near said top end and a bottom portion near said bottom end, said indentation has a highest position away from said bottom end, and the distance from said highest position to said bottom portion is between 13 mm and 30 mm.

6. The water inlet pipe of claim 2 wherein said plurality of notches is spaced evenly along the circumference of said pipe body.

7. The water intake riser of claim 6, wherein the gap is rectangular.

8. The water intake riser of claim 6 wherein the indentations are in any one or a combination of the following: triangle, trapezoid, arc.

9. A positive displacement water heater, comprising: an inner bladder, the inlet tube of any one of claims 1 to 8, the outlet end of the inlet tube being disposed within the inner bladder.

10. A positive displacement water heater as claimed in claim 9, wherein the inlet conduit is at least partially longitudinally disposed within the bladder.

11. A positive displacement water heater as claimed in claim 9 or 10, further comprising heat exchange means.

12. A positive-displacement water heater as claimed in claim 11, wherein the positive-displacement water heater comprises a positive-displacement gas water heater and the heat exchange means comprises a heat exchange flue.

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