Coil assembly with waterproof insertion sheet sheath and condensation pump with coil assembly

Abstract

The coil assembly comprises a coil rack, the insertion sheet sheath, a first insertion sheet and a stator coil wound on the coil rack, the first insertion sheet is in conduction connection with the stator coil and is fixed on the coil rack, the insertion sheet sheath is provided with an installation hole, and the installation hole is communicated with the first insertion sheet. The mounting hole comprises a first through hole formed in the insertion piece sheath and a second through hole formed in the sealing soft rubber of the insertion piece sheath in an injection molding mode, the first through hole and the second through hole axially coincide, the insertion piece penetrates through the mounting hole to be assembled with the insertion piece sheath, the first insertion piece is in interference fit with the mounting hole, and the waterproof performance and the sealing performance of the insertion piece sheath can be improved.

Description

Technical Field

[0001] This utility model relates to a coil assembly with a waterproof insert sheath and a condenser pump having the same, which may be classified as F04D13 / 06 by IPC. Background Technology

[0002] In existing technologies, the condensate pump is installed in the water tank of a dryer, with the condensate pump coil prongs facing upwards. When the condensate pump is working, water droplets condensing above the water tank drip onto the prong sleeve and seep in along the gap between the prongs and the sleeve, easily causing leakage between the two prongs and leading to a short circuit in the coil. Therefore, improving the sealing performance between the condensate pump prongs and the sleeve has become an urgent problem to be solved.

[0003] Common knowledge and terminology can be found in Chinese patents CN206830465U "A condenser pump to prevent short circuit at the blade end", CN220553387U "A coil assembly and a condenser pump containing the same", the Mechanical Engineering Handbook and the Electrical Engineering Handbook published by China Machine Press in 1978-1983 or 1997, and the Pump Theory and Technology published by China Machine Press in 2014. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a coil assembly with a waterproof insert sheath and a condensate pump having the same, which can effectively improve the sealing performance between the condensate pump insert and the insert sheath.

[0005] In a first aspect, this utility model provides a coil assembly with a waterproof insert sleeve, comprising: a coil frame, an insert sleeve, a first insert, and a stator coil wound on the coil frame, wherein the first insert is electrically connected to the stator coil and fixed on the coil frame, the insert sleeve is provided with a mounting hole, the mounting hole including a first through hole opened on the insert sleeve and a second through hole opened in the sealing soft rubber injected into the insert sleeve, the first through hole and the second through hole communicating axially, the insert passing through the mounting hole to assemble the insert sleeve, and the first insert and the mounting hole being interference fit.

[0006] The coil assembly with waterproof insert sleeve according to the present utility model has at least the following beneficial effects: by injecting a perforated sealing soft rubber into the insert sleeve, after the insert sleeve is installed on the first insert, the first insert is interference-fitted with the first through hole and the second through hole, water droplets cannot enter the coil from the insert sleeve, preventing the coil from short-circuiting, and effectively improving the sealing and waterproof performance of the coil assembly.

[0007] According to some embodiments of the present invention, the end face of the insert sleeve along the insertion direction forms a chamfer with the first through hole. This chamfer makes it easier for the insert to be inserted into the mounting hole, thereby making the assembly of the insert sleeve simpler.

[0008] According to some embodiments of this utility model, the first insert includes a first connecting portion and a second connecting portion. One end of the first connecting portion and the second connecting portion is connected to an external power source, and the other end of the first connecting portion is connected to the lead-out end of the stator coil winding. The other end of the second connecting portion is electrically connected to a lead-out end of a thermal protector. The coil frame is provided with a second insert. One end of the second insert is connected to another lead-out end of the stator coil winding, and the other end is electrically connected to another lead-out end of the thermal protector. The thermal protector can realize the switching on and off of the coil according to the coil temperature.

[0009] According to some embodiments of the present invention, the insertion end face of the insert sheath extends into a limiting claw, the limiting claw including a first claw and a second claw, and the first width L1 between the first claw and the second claw is greater than the second width L2 of the thermal protector. The limiting claw presses against the thermal protector and limits the thermal protector.

[0010] According to some embodiments of the present invention, the second claw is stepped, a first reinforcing rib is provided between the first claw and the second claw, and a second reinforcing rib is provided on the outer end face of the second claw, thereby enhancing the stability of the limiting claw.

[0011] Secondly, this utility model provides a condensate pump, which belongs to the category of miniature shielded electric pumps, including a coil assembly with a waterproof insert sleeve as described in the first aspect above, as well as a pump cover, a pump body, a rotor assembly with an impeller, and a stator core. The pump body is provided with a first chamber for injecting epoxy resin, the stator core and the coil assembly are assembled in the first chamber, a second chamber is provided in the first chamber, and the rotor assembly is assembled in the second chamber. Attached Figure Description

[0012] The accompanying drawings are provided to further understand the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this utility model to explain the technical solution of this utility model, and do not constitute a limitation on the technical solution of this utility model.

[0013] Figure 1 This is a three-dimensional schematic diagram of a condensate pump provided in one embodiment of the present invention;

[0014] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the coil assembly of the condenser pump is shown.

[0015] Figure 3 yes Figure 2A front view schematic diagram of the coil assembly is shown;

[0016] Figure 4 yes Figure 2 A rear view schematic diagram of the coil assembly is shown;

[0017] Figure 5 yes Figure 2 A top view of the coil assembly is shown.

[0018] Figure 6 yes Figure 5 A schematic AA cross-sectional view of the coil assembly is shown;

[0019] Figure 7 yes Figure 2 A top view of the insert sheath 320 is shown;

[0020] Figure 8 yes Figure 7 A side view of the insert sheath 320 is shown;

[0021] Figure 9 yes Figure 7 The schematic diagram shown is a BB cross-sectional view of the insert sheath 320;

[0022] Figure 10 yes Figure 7 The diagram shown is a bottom view of the insert sheath 320;

[0023] Figure 11 yes Figure 1 A front view schematic diagram of the condensate pump is shown;

[0024] Figure 12 yes Figure 11 The diagram shows a CC cross-sectional view of the condensate pump.

[0025] Figure 13 yes Figure 11 The diagram shows a DD cross-sectional view of a condenser pump without epoxy resin 260 filling.

[0026] Icon labels:

[0027] Pump cover 100;

[0028] Pump body 200; impeller 210; rotor assembly 220; stator core 230; first chamber 240; second chamber 250; epoxy resin 260;

[0029] Coil assembly 300; coil frame 310; insert sleeve 320; end face 321 along the insertion direction; chamfer 322; limiting claw 323; first claw 324; second claw 325; first reinforcing rib 326; second reinforcing rib 327; first insert 330; first connecting part 331; second connecting part 332; second insert 340; stator coil 350; mounting hole 360; first through hole 361; second through hole 362; sealing soft glue 370; thermal protector 380. Detailed Implementation

[0030] The embodiments of this utility model are further improvements to the prior application CN206830465U "A Condensate Pump for Preventing Short Circuit at the Impeller End". Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0033] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0034] Reference Figures 2 to 8The coil assembly 300 includes: a coil frame 310, a blade sleeve 320, a first blade 330, and a stator coil 350. The stator coil 350 is wound around the outer periphery of the coil frame 310. The first blade 330 is fixed on the coil frame 310 and connected to the stator coil 350. The blade sleeve 320 has a first through hole 361. A sealing soft rubber 370 is injected into the first through hole 361 of the blade sleeve 320. A second through hole 362 is formed on the sealing soft rubber 370. The first through hole 361 and the second through hole 362 are axially connected to form a mounting hole 360. The first blade 330 passes through the mounting hole 360 ​​so that the blade sleeve 320 is assembled on the first blade 330. The first blade 330 and the mounting hole 360 ​​are interference fit without any gap. Specifically, the condenser pump containing the coil operates in the water tank of the dryer. During the operation of the condenser pump, water droplets easily condense on the top of the water tank. Since the condenser pump's insert faces upward, the water droplets will drip onto the insert or insert sleeve 320. Because the mounting hole 360 ​​is composed of a first through hole 361 opened by the insert sleeve and a second through hole 362 opened by the sealing soft rubber 370, and the first insert 330 is interference-fitted with the mounting hole 360, water droplets cannot penetrate into the stator coil 350 from the insert sleeve 320, preventing the coil from short-circuiting and improving the sealing and waterproof performance of the coil assembly 300.

[0035] Reference Figures 8 to 10 The insert sleeve 320 includes an end face 321 along the insertion direction, which forms a chamfer 322 with the first through hole 361. When the insert sleeve 320 is assembled, the first insert 330 passes through the first through hole 361 and the second through hole 362 along the chamfer 322, making it easier for the first insert 330 to be inserted into the mounting hole 360. Therefore, the installation of the insert sleeve 320 is simpler and more convenient.

[0036] Reference Figures 2 to 4A second insert 340 is fixed on the coil frame 310. One end of the second insert 340 is connected to the lead-out end of the stator coil 350 winding, and the other end is connected to one lead-out end of the thermal protector 380. The first insert 330 includes a first connecting portion 331 and a second connecting portion 332. One end of the first connecting portion 331 and the second connecting portion 332 is connected to an external power source. The other end of the first connecting portion 331 is electrically connected to another lead-out end of the stator coil 350 winding, and the other end of the second connecting portion 332 is connected to the other lead-out end of the thermal protector 380, thereby achieving a series connection of the first connecting portion 331, the stator coil 350, the second insert 340, the thermal protector 380, and the second connecting portion 332. The thermal protector 380 detects the temperature of the stator coil 350 to control the circuit's on / off state, preventing the stator coil 350 from burning out due to overheating. Specifically, the thermal protector 380 is placed on the surface of the stator coil 350. Therefore, the thermal protector 380 can detect the temperature of the stator coil 350 in a timely manner. When the thermal protector 380 detects that the temperature exceeds the set threshold, the thermal protector 380 will automatically cut off the circuit to prevent the stator coil 350 from burning out.

[0037] Reference Figures 2 to 8 The end face of the insert sleeve 320 extends into a limiting claw 323, which includes a first claw 324 and a second claw 325. The first width L1 between the first claw 324 and the second claw 325 is greater than the second width L2 of the thermal protector 380. Specifically, since the thermal protector 380 is fixed and placed on the surface of the stator coil 350 only by wire connection, when the insert sleeve 320 is assembled, the insert sleeve 320 is gradually pressed down, and the limiting claw 323 on the insert sleeve 320 is also gradually pressed down until it presses down on the thermal protector 380. Therefore, the limiting claw 323 can press down on the thermal protector 380 and limit the thermal protector 380. Since the first width L1 between the first claw 324 and the second claw 325 is greater than the second width L2 of the thermal protector 380, the thermal protector 380 is restricted between the first claw 324 and the second claw 325 to prevent the thermal protector 380 from displacement. The second claw 325 is generally stepped. A first reinforcing rib 326 is provided between the first claw 324 and the second claw 325, and a second reinforcing rib 327 is provided on the outer end face of the second claw 325, which enhances the strength of the limiting claw 323 and prevents the insert sleeve 320 from being damaged due to excessive pressure during subsequent injection molding. It should be noted that the first reinforcing rib mainly strengthens the radial strength between the first and second claws; the second reinforcing rib mainly strengthens the strength of the second claw in the stepped direction.

[0038] For example, the first width L1 between the first claw 324 and the second claw 325 is 8.7 mm, and the second width of the thermal protector 380 is 7 mm. When the limiting claw 323 is pressed down as the insert sleeve 320 is assembled, a part of the thermal protector 380 is just limited within the limiting claw 323 and pressed against the surface of the stator coil 350 by the limiting claw 323.

[0039] Reference Figure 1 , Figures 11 to 13 This application provides a condensation pump, which belongs to the category of miniature shielded electric pumps, including the aforementioned coil assembly 300, a pump cover 100, a pump body 200, a rotor assembly 220 with an impeller 210, and a stator core 230. The pump body 200 has a first chamber 240 filled with epoxy resin 260. The stator core 230 and the coil assembly 300 are assembled in the first chamber 240. A second chamber 250 is provided in the first chamber 240, and the rotor assembly 220 is assembled in the second chamber 250. Specifically, in order to prevent the coil assembly 300 from being corroded, epoxy resin 260 is injected into the first chamber 240, which houses the stator core 230 and the coil assembly 300, to form a sealed space. This also reduces the operating temperature of the coil assembly 300.

[0040] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A coil assembly (300) with a waterproof grommet sheath (320), comprising: The coil holder (310), the tab sheath (320), the first tab (330) and the stator coil (350) wound on the coil holder (310), wherein the first tab (330) is in conductive connection with the stator coil (350) and is fixed on the coil holder (310), and the tab sheath (320) is provided with a mounting hole (360), characterized in that the mounting hole (360) comprises a first through hole (361) formed on the tab sheath (320) and a second through hole (362) formed on a sealing soft rubber (370) injection molded on the tab sheath (320), the first through hole (361) and the second through hole (362) are axially through, the first tab (330) passes through the mounting hole (360) to assemble the tab sheath (320), and the first tab (330) is in interference fit with the mounting hole (360).

2. The coil assembly (300) with a waterproof grommet sheath (320) according to claim 1, characterized in that, The end surface (321) of the tab sheath (320) in the insertion direction forms a chamfer (322) with the first through hole (361).

3. The coil assembly (300) with a waterproof grommet sheath (320) of claim 1, wherein, The first tab (330) comprises a first connecting portion (331) and a second connecting portion (332), one end of the first connecting portion (331) and the second connecting portion (332) is connected with an external power supply, the other end of the first connecting portion (331) is connected with a lead-out end of a winding of the stator coil (350), and the other end of the second connecting portion (332) is electrically connected with a lead-out end of a thermal protector (380); the coil holder (310) is provided with a second tab (340), one end of the second tab (340) is connected with another lead-out end of the winding of the stator coil (350), and the other end is electrically connected with another lead-out end of the thermal protector (380).

4. The coil assembly (300) with a waterproof grommet sheath (320) according to claim 3, characterized in that, The insertion end surface (321) of the tab sheath (320) extends a limiting claw (323), the limiting claw (323) comprises a first claw (324) and a second claw (325), and a first width L1 between the first claw (324) and the second claw (325) is greater than a second width L2 of the thermal protector (380).

5. The coil assembly (300) with a waterproof grommet sheath (320) according to claim 4, characterized in that, The second claw (325) is in a stepped shape, a first reinforcing rib (326) is arranged between the first claw (324) and the second claw (325), and a second reinforcing rib (327) is arranged on an outer end surface of the second claw (325).

6. A condensate pump characterized by: It belongs to a miniature shielding electric pump, comprising the coil assembly (300) with the waterproof tab sheath (320) according to any one of claims 1-5, a pump cover (100), a pump body (200), a rotor assembly (220) with an impeller (210) and a stator core (230), the pump body (200) is provided with a first chamber (240) filled with epoxy resin (260), the stator core (230) and the coil assembly (300) are assembled in the first chamber (240), the first chamber (240) is provided with a second chamber (250), and the rotor assembly (220) is assembled in the second chamber (250).

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