Shielded circulating pump and air conditioning device

Abstract

The utility model discloses a shielding type circulating pump and an air conditioning device, and relates to the technical field of circulating pumps, the shielding type circulating pump comprises a pump shell, a stator with a first connecting end and a rotor rotatably arranged in the stator, and the first connecting end is connected with one side of the pump shell; the shielding sleeve is arranged between the rotor and the stator; the shielding sleeve is provided with a fixed section, and the fixed section is arranged between the first connecting end and the pump shell; the first sealing piece is provided with a first annular sealing section and a second annular sealing section, the second sealing section is arranged on the outer edge of the first sealing section, and the second sealing section faces the first connecting end; the inner diameter of the second sealing section is larger than that of the first sealing section; the first sealing section is arranged between the fixed section and the pump shell; the first connecting end is provided with a mounting ring groove, the fixing section is located in the mounting ring groove, and at least part of the second sealing section is arranged in the mounting ring groove so as to seal a gap between the fixing section and the stator. The shielding type circulating pump sealing structure solves the problem that an existing shielding type circulating pump sealing structure cannot prevent external water vapor from entering a motor.

Description

TECHNICAL FIELD

[0001] The utility model relates to circulating pump technical field, especially shielded circulating pump and air conditioning unit. BACKGROUND

[0002] The motor sealing structure of the existing shielded circulating pump mainly sets the sealing ring between the shield sleeve and the pump shell, and seals the sealing ring by the shield sleeve and the pump shell being pressed, so as to prevent the internal pumping medium from leaking, however, affected by the pumping medium temperature of the shield pump, the air entering the shield sleeve from outside can form condensation between the motors, which can cause corrosion, burning and other risks in the motor, and further affect the service life of the circulating pump. SUMMARY

[0003] The utility model discloses a shielded circulating pump, which aims to solve the problem that the sealing structure of the existing shielded circulating pump cannot prevent external water vapor from entering the motor.

[0004] To achieve the above-mentioned purpose, the utility model discloses a shielded circulating pump, which comprises:

[0005] A pump shell;

[0006] A stator having a first connecting end connected to one side of the pump shell;

[0007] A rotor rotatably arranged in the stator;

[0008] A shield sleeve arranged between the rotor and the stator; the shield sleeve has a fixed segment arranged between the first connecting end and the pump shell; and

[0009] A first sealing member having a first sealing segment and a second sealing segment in the shape of a ring; the second sealing segment is arranged at the outer edge of the first sealing segment, and the second sealing segment faces the first connecting end; the inner diameter of the second sealing segment is larger than the inner diameter of the first sealing segment;

[0010] The first sealing segment is arranged between the fixed segment and the pump shell;

[0011] The first connecting end is provided with a mounting ring groove, the fixed segment is located in the mounting ring groove, and at least part of the second sealing segment is arranged in the mounting ring groove to seal the gap between the fixed segment and the stator.

[0012] In an embodiment, the stator is provided with an annular protrusion at the first connecting end, the annular protrusion exceeds the fixed segment, and the mounting ring groove is defined between the fixed segment and the annular protrusion.

[0013] In an embodiment, the length of the second sealing segment ranges from 0.5mm to 1mm.

[0014] In an embodiment, the first seal further comprises a mounting ring segment disposed at an inner ring edge of the first seal segment opposite the second seal segment.

[0015] In an embodiment, the first seal is a rubber seal.

[0016] In an embodiment, the inner ring mouth of the first seal segment has a guide segment flared towards the second seal segment.

[0017] In an embodiment, the canned circulation pump further comprises an electric control assembly and a second seal; the stator has a second connecting end opposite the first connecting end; the second seal is disposed between the electric control assembly and the second connecting end.

[0018] In an embodiment, the second connecting end is provided with a positioning ring groove, and the second seal is disposed in the positioning ring groove.

[0019] In an embodiment, the canned circulation pump further comprises a third seal, and the third seal is disposed between the electric control assembly and the canned sleeve.

[0020] In an embodiment, the canned circulation pump further comprises a fourth seal, and the fourth seal is disposed at an end of the canned sleeve away from the fixed segment to seal the pumping medium.

[0021] In an embodiment, the second seal is a sealing ring.

[0022] In an embodiment, the second seal and the third seal are both rubber seals.

[0023] The utility model further provides an air conditioning device, comprising the canned circulation pump in any one of the above schemes.

[0024] The technical scheme of the utility model adopts the first seal disposed between the canned sleeve and the pump shell, which comprises a first seal segment and a second seal segment, the first seal segment is responsible for directly sealing the gap between the fixed segment of the canned sleeve and the pump shell, and prevents the pumping medium from leaking; the second seal segment is located at the outer edge of the first seal segment and faces the first connecting end of the stator, and the inner diameter of the second seal segment is greater than the inner diameter of the first seal segment; the first connecting end is provided with a mounting ring groove, the fixed segment of the canned sleeve does not exceed the area defined by the mounting ring groove, and at least part of the second seal segment is disposed in the mounting ring groove, the second seal segment is equivalent to covering the fixed segment, forming an effective sealing barrier, effectively preventing external air from entering the motor from the gap between the pump shell and the stator, and greatly reducing the risk of corrosion and burning of the motor caused by air entering. BRIEF DESCRIPTION OF DRAWINGS

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 A schematic diagram of a structure of an embodiment of the shielded circulating pump provided by this utility model;

[0027] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0028] Figure 3 A schematic diagram of the structure of an embodiment of the first sealing element provided by this utility model;

[0029] Figure 4 for Figure 3 A cross-sectional structural schematic diagram of an embodiment of the first sealing element.

[0030] Explanation of icon numbers:

[0031] 100. Pump casing;

[0032] 200, Stator; 201, First connecting end; 202, Second connecting end; 210, Mounting ring groove; 220, Annular protrusion; 230, Positioning ring groove;

[0033] 300. Rotor;

[0034] 400. Shielding sleeve; 410. Fixing section;

[0035] 500. First sealing element;

[0036] 510. First sealing section;

[0037] 520. Second sealing section;

[0038] 530. Installation ring section;

[0039] 540. Guide section;

[0040] 600. Second seal;

[0041] 700. Third sealing element;

[0042] 800. Fourth sealing element;

[0043] 900. Electronic control components.

[0044] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0046] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0047] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0048] The existing motor sealing structure of canned motor circulating pumps mainly involves setting a sealing ring between the shielding sleeve and the pump casing. The shielding sleeve and the pump casing are pressed together to seal the sealing ring and prevent leakage of the pumped medium. However, due to the temperature of the pumped medium, air entering the shielding sleeve from the outside will condense between the motor and the casing, leading to risks such as corrosion and burnout inside the motor, which in turn affects the service life of the circulating pump.

[0049] This invention proposes a shielded circulating pump that solves the problem that the existing shielded circulating pump sealing structure cannot prevent external water vapor from entering the motor.

[0050] Please see Figures 1 to 4In one embodiment of the present invention, the shielded circulating pump includes a housing, a pump casing 100, and a stator 200, a rotor 300, a shielding sleeve 400, an electrical control component 900, an impeller assembly, etc. disposed within the housing.

[0051] The pump casing 100 has an inlet and an outlet. An impeller is disposed inside the pump casing 100. A rotor 300 is disposed inside the stator 200. A shielding sleeve 400 is disposed between the rotor 300 and the stator 200. The shaft of the impeller assembly is connected to the rotor 300. An electrical control assembly 900 is electrically connected to the stator 200 and the rotor 300.

[0052] To seal the pumping medium inside the pump chamber and prevent leakage, and to seal the inside of the motor (outside the shielding sleeve 400) to prevent external splashing water and air (which may form condensation inside the motor due to the temperature difference of the internal pumping medium) from entering the motor.

[0053] A first sealing element 500 is provided between the pump housing 100 and the shielding sleeve 400. The first sealing element 500 includes a first sealing section 510 and a second sealing section 520 that are annular. The second sealing section 520 is located on the outer edge of the first sealing section 510 and faces the first connecting end 201. The inner diameter of the second sealing section 520 is larger than the inner diameter of the first sealing section 510.

[0054] The stator 200 has internal windings for generating a rotating magnetic field to drive the rotor 300 to rotate. The first connection end 201 is the part that connects the stator 200 to the pump casing 100.

[0055] The rotor 300 is a rotatable component located inside the stator 200. It is usually composed of an iron core and windings and rotates under the influence of the rotating magnetic field generated by the stator 200.

[0056] The shielding sleeve 400 is a sleeve made of non-magnetic material placed between the rotor 300 and the stator 200. It is used to isolate the electromagnetic field between the stator 200 and the rotor 300, and at the same time protect the inside of the motor from the corrosion of the pumping medium. The fixed section 410 is part of the shielding sleeve 400.

[0057] The shielding sleeve 400 has a fixed section 410, which is located between the first connecting end 201 and the pump housing 100; a first sealing section 510 is located between the fixed section 410 and the pump housing 100; the fixed section 410 and the pump housing 100 press the first sealing section 510 to seal the pumping medium inside the pump chamber and prevent leakage of the pumping medium.

[0058] Reference Figure 2 and Figure 4On the axial cross-section of the first seal 500, the first sealing segment 510 and the second sealing segment 520 are L-shaped, with the first sealing segment 510 being the vertical segment of the L-shape and the second sealing segment 520 being the horizontal segment of the L-shape; that is, the first sealing segment 510 and the second sealing segment 520 are two sealing rings, with the second sealing segment 520 extending from the outer edge of the first sealing segment 510. The first connecting end 201 is provided with a mounting ring groove 210, the fixing segment 410 is located within the mounting ring groove 210, and at least a portion of the second sealing segment 520 is located within the mounting ring groove 210. 10. To seal the gap between the fixed section 410 and the stator 200; when external air enters from the pump casing 100, because the fixed section 410 is located inside the second sealing section 520, it is equivalent to covering the fixed section 410; blocking the air from further entering the rotor 300 through the shielding sleeve 400 through the gap between the fixed section 410 and the stator 200; thus achieving a seal on the inside of the motor and the outside of the shielding sleeve 400, preventing external splash water from entering the motor, and at the same time preventing external air from entering the motor and forming condensation inside the motor under the influence of the temperature difference of the pumping medium.

[0059] The technical solution of this utility model adopts a first sealing element 500 between the shielding sleeve 400 and the pump housing 100. This includes a first sealing section 510 and a second sealing section 520. The first sealing section 510 is responsible for directly sealing the gap between the fixed section 410 of the shielding sleeve 400 and the pump housing 100 to prevent leakage of the pumping medium. The second sealing section 520 is located on the outer edge of the first sealing section 510 and faces the first connecting end 201 of the stator 200. Its inner diameter is larger than that of the first sealing section 510. An mounting ring groove 210 is provided on the first connecting end 201. The fixed section 410 of the shielding sleeve 400 does not exceed the area defined by the mounting ring groove 210. At the same time, at least a part of the second sealing section 520 is provided in the mounting ring groove 210. The second sealing section 520 is equivalent to covering the fixed section 410, forming an effective sealing barrier. This effectively prevents external air from entering the motor from the gap between the pump housing 100 and the stator 200, greatly reducing the risk of corrosion and burnout of the motor due to air ingress.

[0060] In one embodiment, the stator 200 has an annular protrusion 220 at the first connecting end 201. The annular protrusion 220 extends beyond the fixing section 410, and a mounting annular groove 210 is defined between the fixing section 410 and the annular protrusion 220. As the core of the electromagnetic components, the stator 200's first connecting end 201 is not only responsible for connecting with the pump housing 100, but also bears the installation and positioning functions of other key components. In order to construct an effective sealing barrier, the stator 200 is specially provided with an annular protrusion 220 at the first connecting end 201. The annular protrusion 220 is close to the outer edge of the stator 200 and extends vertically along the first connecting end 201, forming an annular platform or protrusion. The outer edge of the annular protrusion 220 is higher than the fixed section 410, and an annular space is naturally formed between the fixed section 410 and the annular protrusion 220, namely the mounting annular groove 210. In order to ensure the sealing effect, the second sealing section 520 is in clearance fit with the fixed section 410 and the annular protrusion 220; or the second sealing section 520 abuts against the annular protrusion 220, that is, abuts against the groove wall of the mounting annular groove 210.

[0061] In other embodiments, the mounting groove 210 is formed as a recess on the first connecting end 201.

[0062] Specifically, the length of the second sealing section 520 ranges from 0.5mm to 1mm, with a limit of 0.5mm to ensure a tight fit within the mounting ring groove 210. The 1mm maximum length limit is also based on practical application considerations. Furthermore, the length of the second sealing section 520 is closely related to its material and hardness. Seals of different materials and hardness may exhibit different sealing effects at the same length. Therefore, when selecting the length of the second sealing section 520, its material and hardness characteristics must be fully considered to ensure the reliability and durability of the sealing effect.

[0063] Reference Figure 3 Specifically, the first seal 500 also includes a mounting ring 530 located at the inner ring edge of the first sealing section 510 relative to the second sealing section 520. The mounting ring 530, located at the inner ring edge of the first sealing section 510, provides additional support and positioning points for the installation of the seal. Although the mounting ring 530 itself does not directly participate in the sealing process, its presence can further increase the contact area and tightness between the seal and the pump housing 100 and the stator 200. When the first seal 500 is equipped with the mounting ring 530, the mounting ring 530 is located at the inner ring edge of the first sealing section 510, while the second sealing section 520 is located at the outer ring edge of the first sealing section 510, and the overall cross-sectional shape of the first seal 500 will be Z-shaped.

[0064] Specifically, the inner annular opening of the first sealing section 510 has a guide section 540 that flares out toward the second sealing section 520; the guide section 540 flares out toward the second sealing section 520, forming a gradually increasing space. During installation, this design guides the seal to enter the predetermined position more smoothly and accurately; the presence of the guide section 540 makes the contact between the first sealing section 510 and the pump housing 100 or stator 200 tighter; when the seal is compressed, the guide section 540 ensures that the sealing surface fits more evenly onto the pump housing 100 or stator 200.

[0065] Specifically, the first sealing element 500 is a rubber component.

[0066] In addition to the first seal, the canned circulation pump also includes other seals to further ensure the sealing effect. Furthermore, the canned circulation pump also includes an electronic control assembly 900 and a second seal 600; the stator 200 has a second connection end 202 opposite to the first connection end 201; the second seal 600 is disposed between the electronic control assembly 900 and the second connection end 202.

[0067] The stator 200 forms an annular notch on the outer edge of the second connection end 202, and the electronic control component 900 forms an abutment part corresponding to the annular notch. The abutment part is located in the environmental notch, and the second seal 600 is deformed by the abutment part and the annular notch to achieve sealing.

[0068] Reference Figure 1 To facilitate the installation of the second seal 600, the second connecting end 202 is provided with a positioning ring groove, and the second seal 600 is disposed in the positioning ring groove; the opening of the positioning ring groove faces the abutment part, and the second seal 600 is installed in the positioning ring groove, partially protruding from the positioning ring groove; the abutment part is installed after the annular notch, and clamps the second seal 600 with the annular notch from top to bottom; in this way, the second seal 600 blocks external air from entering the pump body through the gap between the electronic control component 900 and the stator 200, which helps to prevent moisture, dust and other impurities in the external air from contaminating and damaging the pump body, thereby improving the pump's operating efficiency and lifespan.

[0069] Furthermore, the canned motor circulating pump also includes a third seal 700, which is located between the electrical control assembly 900 and the shielding sleeve 400. The shielding sleeve 400 is bent between the rotor 300 and the stator 200 to form a step. The third seal 700 is installed at this step, and the electrical control assembly 900 and the step press against the third seal 700, preventing external air or impurities from entering the pump body through the tiny gap between the electrical control assembly 900 and the shielding sleeve 400. The third seal 700 is typically made of a wear-resistant, corrosion-resistant, and somewhat elastic material to ensure it can withstand the mechanical stress and chemical corrosion during long-term pump operation while maintaining good sealing performance.

[0070] Furthermore, the canned motor circulating pump also includes a fourth seal 800, located at the end of the canned sleeve 400 furthest from the fixed section 410, to seal the pumped medium. The fourth seal 800, located at the end of the canned sleeve 400 furthest from the fixed section 410, primarily functions to seal the pumped medium. In the canned motor circulating pump, the pumped medium circulates within the pump body through a specific channel, and the fourth seal 800 is located at the end of this circulation channel, ensuring that the medium does not leak from the gap between the canned sleeve 400 and the pump body. The fourth seal 800 should ensure a tight fit between its contact surfaces with the canned sleeve 400 and the pump body, forming an effective sealing barrier.

[0071] This utility model also proposes an air conditioning device, which includes the above-mentioned shielded circulation pump. The specific structure of the shielded circulation pump is as described in the above embodiments. Since this air conditioning device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0072] The air conditioning unit is a residential central air conditioning system, which achieves cooling or heating through the evaporation and condensation of refrigerant. This process requires a water circulation system to remove or provide heat. A shielded circulation pump drives the coolant (usually water or an aqueous glycol solution) to circulate between the evaporator, condenser, and other components of the air conditioning system. For example, in cooling mode, it pumps the high-temperature coolant, after absorbing heat from the indoor evaporator, to the outdoor condenser, where the heat is dissipated to the outside environment. In some central air conditioning systems with heating functions, the shielded circulation pump also circulates hot water. When the system switches to heating mode, the heat pump (if applicable) transfers heat to the coolant, and then the hot water is delivered to indoor radiators or underfloor heating pipes via a water circulation pump, thus providing indoor heating.

[0073] However, it is not limited to this. Shielded circulating pumps can also be used in household hot water circulation systems, small ground source heat pump systems, solar water heating systems, and other water circulation devices.

[0074] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A shielded circulating pump, characterized in that, include: Pump casing; The stator has a first connecting end, which is connected to one side of the pump housing; The rotor is rotatably disposed within the stator; A shielding sleeve is disposed between the rotor and the stator; the shielding sleeve has a fixed section, which is disposed between the first connecting end and the pump casing; and The first sealing element has a first sealing section and a second sealing section that are annular in shape. The second sealing section is disposed on the outer edge of the first sealing section and faces the first connecting end. The inner diameter of the second sealing section is larger than the inner diameter of the first sealing section. The first sealing section is located between the fixed section and the pump casing; The first connecting end is provided with a mounting ring groove, the fixing section is located in the mounting ring groove, and at least a portion of the second sealing section is provided in the mounting ring groove to seal the gap between the fixing section and the stator.

2. The shielded circulating pump as described in claim 1, characterized in that, The stator has an annular protrusion at the first connecting end, the annular protrusion extends beyond the fixed section, and the fixed section and the annular protrusion define the mounting groove.

3. The shielded circulating pump as described in claim 1, characterized in that, The length of the second sealing section ranges from 0.5mm to 1mm.

4. The shielded circulating pump as described in claim 1, characterized in that, The first seal also includes a mounting ring segment disposed on the inner ring edge of the first sealing segment relative to the second sealing segment.

5. The shielded circulating pump as described in claim 1, characterized in that, The first sealing element is a rubber component; and / or, the inner ring of the first sealing section has a guide section that is flared out toward the second sealing section.

6. The shielded circulating pump as described in claim 1, characterized in that, The shielded circulating pump further includes an electrical control component and a second seal; the stator has a second connection end opposite to the first connection end; the second seal is disposed between the electrical control component and the second connection end.

7. The shielded circulating pump as described in claim 6, characterized in that, The second connecting end is provided with a positioning ring groove, and the second sealing element is provided in the positioning ring groove.

8. The shielded circulating pump as described in claim 7, characterized in that, The shielded circulating pump also includes a third seal, which is disposed between the electronic control assembly and the shielding sleeve.

9. The shielded circulating pump as described in claim 7, characterized in that, The shielded circulating pump also includes a fourth seal, which is located at the end of the shield sleeve away from the fixed section to seal the pumped medium.

10. The shielded circulating pump as described in claim 8 or 9, characterized in that, The second seal is a sealing ring; and / or, both the second seal and the third seal are rubber components.

11. An air conditioning device, characterized in that, Including the shielded circulating pump as described in any one of claims 1 to 10.

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