High-pressure water heater of concentric-square-shaped water path

Abstract

The utility model discloses a high-pressure water heater of a concentric-square-shaped waterway, which comprises a heater shell, a water inlet and a water outlet are fixedly arranged at one end of the heater shell, a boss body is fixedly arranged in the heater shell, the boss body is arranged in a trapezoidal structure, and a heating cavity is arranged in a concentric-square-shaped structure. According to the high-pressure water heater with the concentric-square-shaped water path, a heating medium can enter the heating cavity through the water inlet and is discharged through the water outlet to form the concentric-square-shaped water path, and when the heating medium enters the heating cavity, due to the fact that the boss body separates the heating cavity, according to the mechanical energy balance-Bernoulli equation, the section is decreased, and the flow speed is increased; therefore, the heating medium is forced to flow through the heating cavities between the upper heating substrate and the boss body and between the lower heating substrate and the boss body, the flowing heating medium can be rapidly heated, and the heating efficiency of the high-pressure water heater with the concentric-square-shaped water path is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle water heaters, in particular to a high-pressure water heater with a return water path. Background Art

[0002] Since new energy vehicles, especially electric vehicles, do not have internal combustion engines, they cannot use the waste heat of the internal combustion engine to heat the air conditioner. In winter, sufficient heating is not only a pursuit of human comfort, but also a hard indicator of safety (defog). For new energy vehicles, electric heating is the only option.

[0003] Nowadays, the mainstream of automotive heaters is in the two technical fields of PTC and thick film technology. For the optimization of technology, we mainly focus on the following points, such as achieving higher power density, more efficient heating, compactness, lightness, stability and safety performance of product design.

[0004] As proposed in application number 202020612317.1, a high-pressure water heater with an I-type water circuit includes a shell, a heating chamber is provided in the shell, a heating plate is installed on the heating chamber, a boss is provided in the heating chamber, the boss is horizontally arranged in the heating chamber, and the top surface of the boss is lower than the lower surface of the heating plate. This arrangement allows water to flow through the gap between the heating plate and the boss, so that the heating resistor wire can be arranged on the entire surface of the heater where the water flows in contact with the heating plate, thereby maximizing the use of the internal space of the heater and reducing the volume and weight of the heater. For electric vehicles, the weight of internal components is a very important indicator; secondly, since the water flow can be spread in the heating chamber after entering the heating chamber from the water inlet pipe, the pressure drop between the water inlet end and the water outlet end is much smaller than that of the original U-shaped water channel, reducing the water flow pressure requirement in the circulating water channel. In actual use, the heating chamber of the high-pressure water heater in this application is designed with an I-type structure, so that the water flow velocity will not change when the water flows into the heating chamber through the water inlet, thereby reducing the heating efficiency.

[0005] Therefore, we propose a high-pressure water heater with a return water circuit to solve the above-mentioned problems. Utility Model Content

[0006] The utility model aims to provide a high-pressure water heater with a return water path to solve the problem of reduced heating efficiency in the above-mentioned background technology.

[0007] To achieve the above purpose, the utility model provides the following technical solution: a high-pressure water heater with a return water path, comprising a heater housing,

[0008] A water inlet and a water outlet are fixedly installed at one end of the heater housing, and a boss body is fixedly installed inside the heater housing;

[0009] Support plates are fixedly installed inside the upper and lower sides of the heater housing, and upper and lower heating substrates are fitted on the outer sides of the support plates at the upper and lower sides;

[0010] A heating cavity is formed among the heater housing, the boss body, the upper heating substrate and the lower heating substrate.

[0011] Preferably, the water inlet and the water outlet are symmetrically distributed at one end of the heater housing, and both the water inlet and the water outlet are connected to the heating chamber.

[0012] Preferably, the boss body is arranged in a trapezoidal structure, and the heating cavity is arranged in a U-shaped structure, and the heating cavities on both sides of the boss body are designed in a trapezoidal structure.

[0013] The above-mentioned structural design enables the heating medium to enter the heating chamber from the water inlet and be discharged from the water outlet, which is beneficial for the heating medium to cooperate with the water inlet, the water outlet and the heating chamber to form a return water path. The trapezoidal structure of the heating chambers on both sides of the boss body can be obtained according to the mechanical energy balance-Bernoulli equation. It can be concluded that the flow rate is inversely proportional to the cross-section of the cavity, which makes it easier for the heating medium to gradually increase the flow rate after entering the heating chamber through the water inlet, thereby facilitating the heating medium to pass through the heating chamber between the heating plate and the boss faster. The higher the flow rate, the higher the heat exchange efficiency, which improves the heating efficiency of the upper heating substrate and the lower heating substrate in cooperation with the aluminum extruded heat conductive sheet for the heating medium.

[0014] Preferably, the support plate is symmetrically provided with mounting holes, and sealing rings are tightly fitted on the connecting surfaces of the upper heating substrate and the lower heating substrate with the support plate, and the support plate, the upper heating substrate and the lower heating substrate are fixedly connected by bolts using the mounting holes.

[0015] The above-mentioned structural design makes it convenient for the upper heating substrate and the lower heating substrate to cooperate with the sealing ring to cover the supporting plate. In the process of fixing the upper heating substrate and the lower heating substrate, the supporting plate generates pressure on the sealing ring and forces the sealing ring to deform, thereby playing a sealing role, ensuring that the liquid in the heating chamber will not flow out of the heating chamber from positions other than the water inlet and the water outlet, thereby ensuring that the entire high-pressure water heater can work safely.

[0016] Preferably, the outer sides of the water channels of the upper heating substrate and the lower heating substrate need to be welded with a screen-printed layer, and the screen-printed layer includes an insulating layer, an electrode layer, a resistor layer and an isolation layer.

[0017] Preferably, the upper heating substrate and the lower heating substrate are symmetrically distributed about the center line of the boss body, and the aluminum extruded heat conductive sheets are welded at equal intervals on the inner sides of the water channels of the upper heating substrate and the lower heating substrate.

[0018] The above-mentioned structural design allows the screen printing layer to be away from the heating chamber, thereby preventing the heating medium inside the heating chamber from affecting the screen printing layer. The arrangement of the upper heating substrate and the lower heating substrate can release heat more quickly and improve the heating efficiency. At the same time, the aluminum extruded thermal conductive sheet can also guide the heating medium. Compared with heating with a single heating substrate, each heating plate in the double heating substrate has smaller power and a smaller volume, which is conducive to making full use of space and thus saving space occupied by the entire product.

[0019] Compared with the prior art, the utility model has the following beneficial effects: the high-pressure water heater of the return water circuit;

[0020] 1. The heating medium can enter the interior of the heating cavity through the water inlet and be discharged from the water outlet to form a return water path. When the heating medium enters the interior of the heating cavity, due to the separation of the heating cavity by the boss body and according to the mechanical energy balance-Bernoulli equation, when the heating medium enters the interior of the heating cavity on both sides of the boss body through the water inlet, the cross-section becomes smaller and the flow rate increases. The faster the flow rate, the higher the heat exchange efficiency, thereby forcing the heating medium to flow through the heating cavity between the upper heating substrate and the lower heating substrate and the boss body, which is beneficial for the upper heating substrate and the lower heating substrate to cooperate with the aluminum extruded heat conductive sheet to quickly heat the flowing heating medium, thereby improving the heating efficiency of the high-pressure water heater of the return water path;

[0021] 2. The upper heating substrate and the lower heating substrate can be connected to the threads of the mounting holes through bolts to achieve a fixed connection between the upper heating substrate and the lower heating substrate and the supporting plate, wherein the sealing rings that fit the connecting surfaces of the upper heating substrate and the lower heating substrate and the supporting plate will be compressed and deformed to achieve a sealing effect, which is beneficial to prevent the heating medium from flowing out of the heating chamber from positions other than the water inlet and the water outlet, thereby improving the sealing effect of the high-pressure water heater of the return water circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0023] Figure 2 It is a schematic diagram of the side section structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the distribution structure of the boss body of the utility model inside the heater housing;

[0025] Figure 4 This is a schematic diagram of the main structure of the utility model after the upper heating substrate is hidden;

[0026] Figure 5 This is a schematic diagram of the connection structure between the aluminum extruded heat conductive sheet and the upper heating substrate of the utility model;

[0027] Figure 6 It is a schematic diagram of the cross-sectional structure of the return waterway of the utility model.

[0028] In the figure: 1. heater housing; 2. water inlet; 3. water outlet; 4. boss body; 5. heating chamber; 6. support plate; 7. mounting hole; 8. upper heating substrate; 9. lower heating substrate; 10. aluminum extruded heat conductive sheet. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1-6 The utility model provides a technical solution: a high-pressure water heater with a return water path, comprising a heater shell 1, a water inlet 2 and a water outlet 3 are fixedly installed at one end of the heater shell 1, the water inlet 2 and the water outlet 3 are symmetrically distributed at one end of the heater shell 1, a boss body 4 is fixedly installed inside the heater shell 1, the boss body 4 is arranged in a trapezoidal structure, a heating chamber 5 is formed between the heater shell 1, the boss body 4, the upper heating substrate 8 and the lower heating substrate 9, and the water inlet 2 and the water outlet 3 are both connected to the heating chamber 5, and the heating chamber 5 is arranged in a return structure, and the heating chambers 5 on both sides of the boss body 4 are designed in a trapezoidal structure. The design of the above structure makes the heating medium It can enter the interior of the heating chamber 5 through the water inlet 2, and then enter the heating chamber 5 of the side trapezoidal structure. Because the cross-section of the heating chamber 5 gradually decreases, it can be known from the mechanical energy balance-Bernoulli equation at this time that the flow rate of the heating medium in the heating chamber 5 can be gradually increased. In the process of the flow of the heating medium, a part of the heating medium can pass through the heating chamber 5 formed between the upper heating substrate 8 and the lower heating substrate 9 and the boss body 4, and enter the heating chamber 5 of the output side trapezoidal structure and be discharged from the water outlet 3, thereby realizing the circumferential flow of the heating medium. The heating of the heating medium by the upper heating substrate 8 and the lower heating substrate 9 and the aluminum extruded heat conductive sheet 10 is beneficial to improving the heating efficiency.

[0031] The upper and lower sides of the heater housing 1 are fixedly installed with supporting plates 6, and the outer sides of the upper and lower supporting plates 6 are fitted with upper heating substrates 8 and lower heating substrates 9. The supporting plates 6 are symmetrically provided with mounting holes 7, and the connecting surfaces of the upper heating substrate 8 and the lower heating substrate 9 and the supporting plates 6 are tightly fitted with sealing rings, and the supporting plates 6, the upper heating substrate 8 and the lower heating substrate 9 are fixedly connected by bolts using the mounting holes 7. The outer sides of the water channels of the upper heating substrate 8 and the lower heating substrate 9 need to be welded with a screen printing layer, and the screen printing layer includes an insulating layer, an electrode layer, a resistor layer and an isolation layer. The design of the above structure, The aluminum extruded heat conductive sheet 10 can guide the heating medium flowing through it, so that when the upper heating substrate 8 and the lower heating substrate 9 are connected to the supporting plate 6, the bolts can penetrate the upper heating substrate 8 and the lower heating substrate 9 and are threadedly connected to the mounting holes 7, which is conducive to the stable installation of the upper heating substrate 8 and the lower heating substrate 9. When the upper heating substrate 8 and the lower heating substrate 9 are installed, the sealing rings between the upper heating substrate 8 and the lower heating substrate 9 and the supporting plate 6 are compressed to achieve a connection seal, which can effectively prevent the heating medium from flowing out of the heating chamber 5 from the water inlet 2 and the water outlet 3, thereby improving the sealing performance.

[0032] Working principle: When using the high-pressure water heater with a return water circuit, first Figure 1-5 As shown, after the heating medium enters the heating chamber 5 connected to the water inlet 2 from the water inlet end on the left side, a part of the heating medium passes through the gap between the aluminum extruded heat conductive sheet 10 on the upper heating substrate 8 and the boss body 4, and another part of the heating medium passes through the gap between the aluminum extruded heat conductive sheet 10 on the lower heating substrate 9 and the boss body 4 from below. At this time, the upper heating substrate 8 and the lower heating substrate 9 cooperate with the aluminum extruded heat conductive sheet 10 to heat and increase the temperature of the heating medium flowing through, and the heating medium after passing through will enter the heating chamber 5 connected to the water outlet 3, and be discharged through the water outlet 3 to achieve efficient heating work;

[0033] When the heating medium enters the heating chamber 5 connected to the water inlet 2 from the water inlet 2, the cavity cross-sectional area of ​​the heating chamber 5 gradually decreases and the flow rate increases. When the heating medium enters the heating chamber 5 connected to the water outlet 3 through the boss body 4 and the aluminum extruded heat conductive sheet 10, the cavity area gradually increases, and the heating medium flows out from the water outlet 3. According to the Bernoulli equation, the flow rate is inversely proportional to the cavity cross-sectional area. During liquid heat exchange, the greater the flow rate, the greater the heat transfer coefficient and the higher the heat transfer efficiency. Therefore, the return water channel can well help the heating medium to perform efficient heat exchange.

[0034] Thereby completing a series of tasks, the contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0035] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-pressure water heater with a return water path, comprising a heater housing (1), characterized in that: A water inlet (2) and a water outlet (3) are fixedly mounted on one end of the heater housing (1), and a boss body (4) is fixedly mounted inside the heater housing (1); Support plates (6) are fixedly mounted inside the upper and lower sides of the heater housing (1), and an upper heating substrate (8) and a lower heating substrate (9) are fitted on the outer sides of the support plates (6) on the upper and lower sides; A heating chamber (5) is formed between the heater housing (1), the boss body (4), the upper heating substrate (8) and the lower heating substrate (9).

2. The high-pressure water heater with a return water circuit according to claim 1, characterized in that: The water inlet (2) and the water outlet (3) are symmetrically distributed at one end of the heater housing (1), and both the water inlet (2) and the water outlet (3) are connected to the heating chamber (5).

3. The high-pressure water heater with a return water circuit according to claim 1, characterized in that: The boss body (4) is arranged in a trapezoidal structure, and the heating chamber (5) is arranged in a round-shaped structure, and the heating chambers (5) on both sides of the boss body (4) are both designed in a trapezoidal structure.

4. The high-pressure water heater with a return water circuit according to claim 1, characterized in that: The support plate (6) is symmetrically provided with mounting holes (7), and the connection surfaces of the upper heating substrate (8) and the lower heating substrate (9) and the support plate (6) are tightly fitted with sealing rings, and the support plate (6), the upper heating substrate (8) and the lower heating substrate (9) are fixedly connected by bolts using the mounting holes (7).

5. The high-pressure water heater with a return water circuit according to claim 1, characterized in that: The outer sides of the water channels of the upper heating substrate (8) and the lower heating substrate (9) need to be welded with a screen printing layer, and the screen printing layer includes an insulating layer, an electrode layer, a resistance layer and an isolation layer.

6. The high-pressure water heater with a return water path according to claim 5, characterized in that: The upper heating substrate (8) and the lower heating substrate (9) are symmetrically distributed about the center line of the boss body (4), and the aluminum extruded heat conductive sheets (10) are welded at equal intervals on the inner sides of the water channels of the upper heating substrate (8) and the lower heating substrate (9).

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