Liquid heating pump with internal circulation flow channel

Abstract

The invention discloses a liquid heating pump with an internal circulation flow channel. The water pump comprises a pump body, a heater and an impeller assembly located in a pump cavity of the pump body, the bottom of the heater is provided with a separation structure which extends into the pump cavity and divides the pump cavity into an inner pump cavity and an outer pump cavity, and a channel gap capable of enabling the inner pump cavity to be communicated with the outer pump cavity is formed between the separation structure and the impeller assembly. A liquid inlet pipe used for introducing liquid is arranged in the center of the heater, a backflow gap is formed between the tail end of the liquid inlet pipe and the impeller assembly, and when the impeller assembly works, a small amount of liquid which is not discharged out of the outer pump cavity can return to the impeller assembly again through the channel gap and the backflow gap by means of negative pressure generated at the impeller assembly. The water pump has the advantages that the pump cavity is ingeniously divided into the inner cavity and the outer cavity, liquid flows in different directions due to different directions of the two cavities, mutual interference is avoided, turbulent flow generated by water flow in the outer cavity of the water pump can be avoided to the greatest extent, and the hydraulic efficiency of the pump body is remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a liquid heating pump, in particular to a liquid heating pump with internal circulation flow channel. BACKGROUND

[0002] Liquid heating pumps have been widely used in kitchen appliances such as dishwashers, and the existing conventional liquid heating pump usually comprises a pump body and a heating device arranged on the top of the pump body, and the liquid in the pump body is heated by the heating device. Although the liquid heating pump has been very mature in technology and has very strong performance with the increasing maturity of technology, the existing conventional liquid heating pump still has the following problems:

[0003] (1) The heating pipe is placed inside the water pump, and this structure can improve the heating efficiency, but it will cause the liquid in the water pump to interact with the heating pipe and generate turbulence, thereby reducing the efficiency of the pump. On the other hand, the surface area of the heating pipe is limited, and the surface temperature is high, which can easily cause scale or corrosion and cause the heating device to malfunction; (2) The pump cavity of the water pump is usually an independent structure, and the cavity is not isolated, which causes the liquid flow rate at the edge and center of the pump to be inconsistent, thereby affecting the hydraulic efficiency of the pump; (3) For the heating device, the temperature of the heater rises too fast, and the temperature switch does not have enough time to react, so when the heater is abnormally overheated, the temperature controller has already been cut off, the internal non-metallic material has been melted, and there is a safety hazard. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a liquid heating pump with internal circulation flow channel, which can effectively reduce the generation of turbulence and improve the hydraulic efficiency and heating efficiency of the pump body.

[0005] In order to solve the above technical problems, the liquid heating pump with internal circulation flow channel comprises a pump body, a heater and an impeller assembly located in the pump cavity of the pump body. The bottom of the heater is provided with a separation structure which extends into the pump cavity and separates the pump cavity into an inner pump cavity and an outer pump cavity. The separation structure and the impeller assembly have a channel gap which can communicate the inner pump cavity and the outer pump cavity. The center of the heater is provided with a liquid inlet pipe for introducing liquid, and the end of the liquid inlet pipe and the impeller assembly have a backflow gap. When the impeller assembly works, a small amount of liquid in the outer pump cavity which is not discharged can be returned to the impeller assembly through the channel gap and the backflow gap by the negative pressure generated at the impeller assembly.

[0006] The bottom of the pump body is provided with a driving device, the rotating shaft of the driving device is connected with the impeller assembly and can drive the impeller assembly to rotate and work, and the side of the pump body is provided with a liquid outlet and can make most of the liquid rotate in the outer pump cavity and then be discharged from the liquid outlet when the impeller assembly works.

[0007] The impeller assembly comprises an impeller body and a turned-up disc arranged on the top of the impeller body, and the channel gap is formed between the partition structure and the turned-up disc.

[0008] The flow channel gap ranges from 0.01mm to 10mm, and the backflow gap ranges from 0.01mm to 5mm.

[0009] The heater is a cast aluminum heater, and a heating pipe is arranged in the cast aluminum heater, and a temperature controller for controlling the working temperature of the heater is arranged on the cast aluminum heater, and the heating pipe and the temperature controller are connected in series and then connected to a control circuit.

[0010] The surface of the heater in contact with water is subjected to corrosion-resistant treatment.

[0011] The driving device comprises a motor base arranged on the bottom of the pump body, a motor with the rotating shaft arranged in the motor base, and the rotating shaft of the motor extends into the pump cavity and is fixedly connected with the impeller assembly.

[0012] An O-ring is arranged between the pump body and the heater.

[0013] The end of the liquid inlet pipe is connected with a tension ring, the tension ring extends into the inner cavity of the turned-up disc and forms the backflow gap therebetween.

[0014] The end of the liquid inlet pipe is connected with a tension ring, the tension ring extends into the periphery of the turned-up disc and forms the backflow gap therebetween.

[0015] A connecting cylinder is arranged at the center edge of the heater, the end of the liquid inlet pipe is connected to the connecting cylinder, and a lower protruding ring is arranged on the bottom surface of the heater and located in the partition structure, and the lower protruding ring and the turned-up disc form the backflow gap therebetween.

[0016] (1) By arranging the partition structure at the bottom of the heater and extending into the pump cavity, the pump cavity is ingeniously divided into two chambers, namely the inner chamber and the outer chamber, and the chamber close to the center of the pump is the inner circulation chamber, and the directions of the two chambers are different (transverse and longitudinal), which causes the liquid to flow in different directions and does not interfere with each other, which can maximize the avoidance of turbulence with the water flow in the outer chamber of the water pump, and significantly improves the hydraulic efficiency of the pump body.

[0017] (2) The cast aluminum heater is adopted and the heating pipe is built in the cast aluminum heater, which replaces the conventional tubular heater, so that the heater heats in the aluminum part and does not directly contact water. The surface of the aluminum part contacting water is flat and is not easy to produce turbulence, thereby further reducing the influence on the thermal efficiency of the water pump. Meanwhile, the contact area of the aluminum die-cast inner surface with water is larger than the direct contact area of the heating pipe, which can effectively improve the heat exchange speed with water, save heating time, and additionally, because of the increase of the surface area, the inner surface temperature of the cast aluminum part is lower than the surface temperature of the heating pipe. The flat and low-temperature surface is less likely to cause scale.

[0018] (4) The temperature controller for controlling the working temperature of the heater is further arranged on the cast aluminum heater. On one hand, the surface area of the heater is increased by the structure of the aluminum die-cast, which effectively reduces the temperature rise speed of the surface of the aluminum die-cast heater, and at the same time, when abnormally working, the temperature controller has sufficient time to react, so that the inner surface of the aluminum die-cast heater will not produce excessively high temperature and is not easy to cause the melting or aging of the non-metallic material.

[0019] (5) The surface of the heater contacting water is subjected to corrosion-resistant treatment (anodic oxidation or surface spraying), which reduces the risk of corrosion of the aluminum material in the liquid and ensures the reliability of use. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic diagram of the three-dimensional structure of embodiment one of the present application;

[0021] Figure 2 is a schematic diagram of the partial cross-sectional structure of embodiment one of the present application;

[0022] Figure 3 is a schematic diagram of the exploded structure of embodiment one of the present application;

[0023] Figure 4 is a schematic diagram of the enlarged structure at A of Figure 1

[0024] Figure 5 is a schematic diagram of the mounting state structure of the impeller assembly in embodiment one of the present application;

[0025] Figure 6 is a schematic diagram of the three-dimensional structure of the heater from the top view in embodiment one of the present application;

[0026] Figure 7 is a schematic diagram of the partial structure in embodiment two of the present application;

[0027] Figure 8 is a schematic diagram of the partial structure in embodiment three of the present application;

[0028] Figure 9 is a schematic diagram of the partial structure of structure one in embodiment four of the present application;​

[0029] Figure 10 A local structure diagram of structure two in example four in the present application;

[0030] Figure 11 A local structure diagram of structure three in example four in the present application. DETAILED DESCRIPTION

[0031] The in-line circulation flow channel liquid heating pump of the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0032] Example one:

[0033] As shown in the figure, the in-line circulation flow channel liquid heating pump of the present application comprises a pump body 1 with a pump cavity, a heater 2 installed on the top of the pump body, a driving device 3 installed on the bottom of the pump body, and an impeller assembly 4 located in the pump cavity of the pump body and capable of being driven to rotate by the driving device 3. The side of the pump body 1 is provided with a liquid outlet 5, the center of the heater 2 is provided with a liquid inlet, the top end of the heater 2 is installed with a liquid inlet pipe 8 extending into the liquid inlet and used for introducing liquid to the impeller assembly 4 in the pump cavity, and the upper end of the pump body 1 is open, so that the heater 2 can be directly installed on the open end of the pump body. In order to ensure the sealing reliability and avoid water leakage during work, an O-ring 10 can also be arranged between the connection of the pump body and the heater. The bottom of the heater 2 is provided with a separation structure 6 extending into the pump cavity and separating the pump cavity into an inner cavity 11 and an outer cavity 12. The inner cavity 11 is in communication with the liquid inlet of the heater 2, and the outer cavity 12 is in communication with the liquid outlet 5 of the pump body 1. Figure 6 It can be seen that the separation structure is a ring protruding from the bottom surface of the heater 2, and the impeller assembly 4 comprises an impeller body 41 and a flange disc 42 provided on the top of the impeller body, as shown in the figure. Figure 5 As shown in the figure, the flange disc comprises a disc body 421 and a flange 422 formed on the top of the disc body, and the center of the flange 422 has an inner passage through the liquid inlet of the heater. Figure 4 In this embodiment, the bottom surface of the ring is opposite to the upper surface edge of the flange 422, so that a passage gap 7 is formed between the separation structure 6 and the impeller assembly 4, which is in communication with the inner pump cavity 11 and the outer pump cavity 12 and is in a horizontal direction. Similarly, as shown in the figure, Figure 4As shown, the end of the liquid inlet pipe 8 has a packing ring 10 installed in the bottom opening end of the liquid inlet pipe 8, the lower end of the packing ring 10 extends into the inner channel of the flange disc, so that the lower end of the packing ring 10 forms a backflow gap 9 with the inner circumferential surface of the flange 422 of the flange disc, that is, a vertical backflow gap 9 is formed between the liquid inlet pipe 8 and the flange disc, before the driving device is powered on, the pump cavity of the pump body is filled with liquid, then the driving device is powered on, the impeller assembly is driven to rotate by the driving device, and the liquid at the impeller assembly is worked, most of the liquid is discharged from the liquid outlet 5 after rotating in the outer chamber 12, and at the same time, the negative pressure generated at the impeller assembly sucks the external liquid into the liquid inlet pipe 8, and a small amount of liquid not discharged from the outer pump cavity returns to the impeller assembly through the channel gap 7 and the backflow gap 9.

[0034] Further, the cast aluminum heater can be used as the heater of the present application, the cast aluminum heater is internally provided with a heating pipe 21, and a temperature controller 22 for controlling the working temperature of the heater is further arranged on the cast aluminum heater, the heating pipe 21 and the temperature controller 22 are connected in series and then connected to the control circuit, and the surface of the heater 2 in contact with water is subjected to corrosion-resistant treatment.

[0035] Further, the driving device 3 in the present application includes a motor base 31 arranged at the bottom of the pump body, a motor 32 arranged in the motor base and having a rotating shaft, the rotating shaft of the motor extends into the pump cavity and is fixedly connected with the impeller body 41 of the impeller assembly 4, so that the impeller assembly can be driven to rotate by the driving device 3.

[0036] In addition, the value of the flow channel gap 7 is 0.01-10mm, and the value of the backflow gap 9 is 0.01-5mm, and the actual test shows that the effect is not great when the value exceeds 5mm, and the performance is greatly attenuated when the value exceeds 3mm, and the best effect is within 1mm, and in fact, controlling the flow channel gap and the backflow gap is the key to improving the technical effect, and the effect of the present application is verified by the following data (the diameter of the pump cavity is 85mm, and the rotating speed of the motor is 3000r / min) :

[0037]

[0038] It can be known from the comparison of the above test data that when the backflow gap is constant, the smaller the channel gap is, the higher the maximum efficiency is, when the channel gap is large, the performance of the product with a small backflow gap is obviously improved, and when the backflow gap and the channel gap are small, the performance is not greatly affected when any one of the gaps changes and the other gap remains unchanged.

[0039] Example two:

[0040] As Figure 7As shown, the liquid heating pump with internal circulation channel in this embodiment is largely the same as that in Embodiment 1, except that the structure of the reflux gap is different. Specifically, the tension ring 10 extends into the periphery of the flange plate and forms a reflux gap 9 between the tension ring 10 and the flange 422 of the flange plate. The cross-sectional shape of the tension ring is as follows: Figure 7 As shown, this structural design does not hinder the achievement of the recirculation purpose of this invention (e.g., Figure 10 (As shown).

[0041] Example 3:

[0042] like Figure 8 As shown, the liquid heating pump with internal circulation channel in this embodiment is largely the same as that in Embodiment 1. The difference lies in the structure of the reflux gap. Unlike Embodiment 2, in this embodiment, the tensioning ring is omitted, and an annular connecting seat (or connecting cylinder) 13 is integrally formed at the center edge of the heater 2. The end of the liquid inlet pipe 8 is connected to the annular connecting seat 13. At the same time, a lower convex ring 14 located in the inner cavity of the partition structure 6 is also provided on the bottom surface of the heater 2. Thus, an annular connecting seat is provided on the top surface of the heater, and the liquid inlet pipe is connected to the annular connecting seat. At this time, the lower convex ring 14 is formed at the bottom surface of the annular connecting seat (the cross-sectional shape is L-shaped). Of course, the lower convex ring can be regarded as the protruding annular structure formed by the extension of the connecting cylinder 13 below the heater 2. In this embodiment, an annular groove 15 is machined on the inner circumferential surface of the protruding annular structure, and the flange extends into the annular groove of the protruding annular structure to form the reflux gap 9.

[0043] Example 4:

[0044] like Figures 9-11 As shown, the liquid heating pump with internal circulation channel in this embodiment is largely the same as that in Embodiment 1, Embodiment 2, or Embodiment 3, except that the channel gap 7 is formed differently. Specifically, it can be formed in the following ways:

[0045] Structure 1: A bottom convex ring 16 is machined on the bottom surface of the annular object. The disc body 421 of the flanged plate is located in the inner cavity of the bottom convex ring 16, thereby forming a channel gap 7 between the inner circumferential surface of the bottom convex ring 16 and the disc body 421 of the flanged plate, and between the top surface of the disc body 421 and the bottom surface of the annular object (e.g., Figure 9 (as shown);

[0046] Structure 2: The annular object is positioned around the periphery of the flange plate to form the channel gap, that is: the lower edge of the annular object is located around the periphery of the flange 422. Figure 10 (as shown);

[0047] Structure 3: Increase the thickness of the ring while ensuring the bottom surface of the ring is directly opposite the upper surface of the flange 422 (e.g., Figure 11 (as shown);

[0048] The above structures do not affect the realization of the present application, that is, the heater makes the ring and the flanging disc maintain a gap, that is, as long as the channel gap can be formed, the present application does not limit the specific structure.

[0049] Of course, the above description is not a limitation of the present application, and the present application is not limited to the above examples. Changes, modifications, additions or replacements made by those skilled in the art within the scope of the present application should also be within the protection scope of the present application.

Claims

1. A liquid heating pump with in-line circulation flow channel, comprising a pump body (1), a heater (2) and an impeller assembly (4) located in the pump cavity of the pump body, characterized in that: The bottom of the heater (2) is provided with a separation structure (6) extending into the pump cavity and separating the pump cavity into an inner pump cavity (11) and an outer pump cavity (12), the separation structure (6) and the impeller assembly (4) have a passage gap (7) allowing the inner pump cavity (11) and the outer pump cavity (12) to communicate, the center of the heater (2) is provided with a liquid inlet pipe (8) for liquid inlet, the end of the liquid inlet pipe (8) and the impeller assembly have a backflow gap (9), and the impeller assembly (4) can make a small amount of liquid in the outer pump cavity that is not discharged to return to the impeller assembly through the passage gap (7) and the backflow gap (9) by negative pressure generated at the impeller assembly during operation of the impeller assembly.

2. The liquid heating pump with internal circulation flow channel according to claim 1, characterized in that: The bottom of the pump body (1) is provided with a driving device (3), the rotating shaft of the driving device (3) is connected with the impeller assembly (4) and can drive the impeller assembly to rotate and work, and the side of the pump body (1) is provided with a liquid outlet (5) and can make most of the liquid rotate in the outer pump cavity (12) and then be discharged from the liquid outlet (5) when the impeller assembly (4) works.

3. A liquid heating pump with an in-line circulation flow path according to claim 1 or 2, characterised in that: The impeller assembly (4) comprises an impeller body (41) and a turned-up disc (42) arranged at the top of the impeller body, and the passage gap (7) is formed between the separation structure and the turned-up disc.

4. The hydronic pump of claim 3, wherein: The value range of the passage gap (7) is 0.01-10mm, and the value range of the backflow gap (9) is 0.01-5mm.

5. The hydronic pump of claim 1, 2 or 4, wherein: The heater (2) is an aluminum casting heater, a heating pipe (21) is arranged in the aluminum casting heater, a temperature controller (22) for controlling the working temperature of the heater is further arranged on the aluminum casting heater, and the heating pipe (21) and the temperature controller (22) are connected in series and then connected to a control circuit.

6. The hydronic pump of claim 5, wherein: The surface of the heater (2) in contact with water is subjected to corrosion-resistant treatment.

7. The hydronic pump of claim 2, wherein: The driving device (3) comprises a motor base (31) mounted on the bottom of the pump body, a motor (32) arranged in the motor base and having the rotating shaft, and the rotating shaft of the motor extends into the pump cavity and is fixedly connected with the impeller assembly (4). The liquid heating pump with internal circulation flow channel according to claim 2 is characterized in that an O-ring (10) is arranged between the pump body (1) and the heater (2).

8. The hydronic pump of claim 3, wherein: The end of the liquid inlet pipe (8) is connected with a tension ring (10), the tension ring (10) extends into the inner cavity of the turned-up disc and forms the backflow gap (9) between the two.

9. The hydronic pump of claim 3, wherein: The end of the liquid inlet pipe (8) is connected with a tension ring (10), the tension ring (10) extends into the periphery of the turned-up disc and forms the backflow gap (9) between the two.

10. The hydronic pump of claim 3, wherein: The center edge of the heater (2) is provided with a connecting cylinder (13), the end of the liquid inlet pipe (8) is connected to the connecting cylinder (13), and the bottom surface of the heater (2) is further provided with a lower convex ring (14) located in the separation structure (6), and the lower convex ring (14) and the turned-up disc form the backflow gap (9) therebetween.

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