Miniature coffee pump capable of prolonging service life

Abstract

The utility model discloses a miniature coffee pump capable of prolonging the service life. The miniature coffee pump comprises a telescopic mechanism, an electromagnetic driving assembly and a shell. The shell internally comprises a liquid inlet channel, a sealing pump cavity and a liquid outlet channel, the liquid inlet channel, the sealing pump cavity and the liquid outlet channel are sequentially communicated, a sealing component is arranged between the sealing pump cavity and the liquid outlet channel, and the sealing component is arranged at the joint of the sealing pump cavity and the liquid outlet channel in an ejection mode; the telescopic mechanism comprises a tension spring, a sealing piece and a first sealing ring, the tension spring is arranged in the first through groove, a first limiting step is arranged between the first through groove and the second through groove, the second end of the tension spring is provided with a limiting part, the first sealing ring is arranged on the limiting part in a sleeving mode, and the sealing piece is arranged on the first sealing ring in a sleeving mode. The limiting part is connected with the first limiting step in a limiting and abutting mode through the first sealing ring, relative friction between the tension spring and the iron core is reduced, and therefore the service life of the micro pump is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of water pumps, in particular to a micro coffee pump with a prolonged service life. Background Art

[0002] Pumps are widely used in equipment and can provide suction power in the equipment. In the prior art, the tension spring inside the pump body contacts the step inside the iron core. During operation, the tension spring and the step inside the iron core slide relative to each other, causing friction between the two, resulting in alternating stress in the area where the tension spring contacts the iron core. The tension spring exceeds its own fatigue resistance, and cracks appear on the surface and subsurface of the tension spring and gradually expand. Eventually, the pump needs to be returned to the factory for repair due to the breakage of the tension spring. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art and provide a miniature coffee pump with a prolonged service life.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A micro coffee pump with extended service life, comprising:

[0006] A housing, wherein a liquid inlet and a liquid outlet are provided at both ends of the housing, and a sealed liquid channel is provided inside the housing, wherein the liquid channel comprises a liquid inlet channel, a sealed pump chamber and a liquid outlet channel, wherein the liquid inlet channel, the sealed pump chamber and the liquid outlet channel are connected in sequence, wherein the liquid inlet is connected to the liquid inlet channel, the liquid outlet is connected to the liquid outlet channel, a sealing component is provided between the sealed pump chamber and the liquid outlet channel, and the sealing component is elastically provided at the connection between the sealed pump chamber and the liquid outlet channel;

[0007] An electromagnetic drive assembly, the electromagnetic drive assembly comprising an iron core, for driving the telescopic mechanism; and

[0008] A telescopic mechanism, the telescopic mechanism is telescopically arranged in the liquid inlet channel and the sealed pump chamber, and includes a tension spring, a sealing member and a first sealing ring. A first through groove and a second through groove are provided inside the iron core, and the sealed pump chamber and the liquid inlet channel are connected through the first through groove and the second through groove. The tension spring is arranged in the first through groove, and a first limiting step is provided between the first through groove and the second through groove. The sealing member abuts against the top of the first through groove. The tension spring includes a first end portion close to the sealed pump chamber and an opposite second end portion, and the first end portion is connected to the sealing member, and a limiting portion is provided at the second end portion. The first sealing ring is sleeved on the limiting portion, and the limiting portion abuts against the first limiting step through the first sealing ring.

[0009] In one embodiment, a second sealing ring is provided between the iron core and the housing.

[0010] In one of the embodiments, the sealing component includes a sealing block, a rubber plug and a compression spring. The sealing block is provided with a liquid outlet hole, the liquid outlet hole connects the sealed pump chamber and the liquid outlet channel, the rubber plug elastically presses the inner wall of the liquid outlet hole through the compression spring, and one end of the compression spring away from the rubber plug abuts against the inner wall of the liquid outlet channel.

[0011] In one of the embodiments, the end of the rubber plug abutting against the liquid outlet is configured to be hemispherical, and the end of the sealing block abutting against the rubber plug is provided with a hemispherical groove.

[0012] In one embodiment, the electromagnetic drive assembly also includes a first spring and a second spring, one end of the first spring and the second spring are respectively arranged at the two ends of the iron core, the other end of the first spring abuts against the inner wall of the sealed pump chamber, and the other end of the second spring abuts against the inner wall of the liquid inlet channel.

[0013] In one embodiment, a second limiting step abutting against the first limiting step is provided on the sealed pump chamber.

[0014] Compared with the prior art, the utility model has at least the following advantages:

[0015] The micro coffee pump with an extended service life of the utility model is provided with a telescopic mechanism, an electromagnetic drive component and a shell. The electromagnetic drive component drives the telescopic mechanism to expand and contract the sealed pump chamber and the liquid inlet channel in the shell, so that the liquid in the pump body flows rapidly in a certain direction. In order to prevent the tension spring from directly contacting with the iron core to form alternating stress and to avoid the tension spring exceeding its own fatigue resistance and direct contact, a first sealing ring is provided at the abutment between the tension spring and the first limiting step inside the iron core. The tension spring is in indirect contact with the iron core through the first sealing ring to prevent cracks from appearing on the surface and sub-surface of the tension spring and gradually extending along the original cracks, thereby reducing the relative friction between the tension spring and the iron core, thereby extending the service life of the micro pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments are briefly introduced below.

[0017] Figure 1 It is a partial cross-sectional structural schematic diagram of a micro coffee pump capable of extending the service life in one embodiment of the utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of a local enlarged structure of A;

[0019] Figure 3 It is a schematic diagram of the matching structure of the tension spring, the first sealing ring and the sealing member;

[0020] Figure 4 Schematic diagram of the structure of a micro coffee pump with a prolonged service life in one embodiment of the utility model.

[0021] Reference numerals:

[0022] Micro pump 100, telescopic mechanism 10, tension spring 11, limiting portion 111, seal 12, first sealing ring 13, iron core 14, housing 20, liquid inlet 21, liquid outlet 22, sealed pump chamber 23, liquid outlet channel 24, sealing component 30, sealing block 31, rubber plug 32, compression spring 33, electromagnetic drive assembly 40, second sealing ring 41, first limiting step 42, second limiting step 43. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.

[0024] The present application proposes a micro coffee pump 100 with a prolonged service life. Figure 1 , Figure 2 , Figure 3 and Figure 4 , including: a telescopic mechanism 10, an electromagnetic drive component 40 and a housing 20. A liquid inlet 21 and a liquid outlet 22 are provided at both ends of the housing 20, and a sealed liquid channel is provided inside the housing 20. The liquid channel includes a liquid inlet channel, a sealed pump chamber 23 and a liquid outlet channel 24, and the liquid inlet channel, the sealed pump chamber 23 and the liquid outlet channel 24 are connected in sequence. The liquid inlet 21 is connected to the liquid inlet channel, and the liquid outlet 22 is connected to the liquid outlet channel 24. A sealing component 30 is provided between the sealed pump chamber 23 and the liquid outlet channel 24, and the sealing component 30 can be ejected and arranged at the connection between the sealed pump chamber 23 and the liquid outlet channel 24, so that the liquid is sealed in the sealed pump chamber 23. Under the drive of the electromagnetic drive component 40, the liquid flows through the sealing component 30 and flows into the liquid outlet channel 24. The flow direction of the liquid in the micro pump 100 is: the liquid enters from the liquid inlet 21 , flows through the liquid inlet channel, the sealed pump chamber 23 , the sealing component 30 and the liquid outlet channel 24 , and finally flows out from the liquid outlet 22 .

[0025] The electromagnetic driving assembly 40 includes an iron core 14 for driving the telescopic mechanism 10 .

[0026] The telescopic mechanism 10 is telescopically arranged in the liquid inlet channel and the sealed pump chamber 23. The telescopic mechanism 10 includes a tension spring 11, a seal 12, a first sealing ring 13 and an iron core 14. The iron core 14 is provided with a first through groove and a second through groove in communication, the tension spring 11 is arranged in the first through groove, a first limiting step 42 is arranged between the first through groove and the second through groove, and the seal 12 abuts against the top of the first through groove. The tension spring 11 includes a first end close to the sealed pump chamber 23 and an opposite second end, and the first end is connected to the seal 12. The diameter of the first end of the tension spring 11 gradually decreases toward the end until it is sleeved on the seal 12, and a step is provided at one end of the seal 12 connected to the tension spring 11, and the first end of the tension spring 11 is sleeved on the step. A limiting portion 111 is provided at the second end, and the diameter of the tension spring 11 on the limiting portion 111 is larger than the diameter of the tension spring 11 at other parts. The first sealing ring 13 is sleeved on the limiting part 111, and the limiting part 111 is limitedly abutted with the first limiting step 42 through the first sealing ring 13. The electromagnetic drive assembly 40 drives the telescopic mechanism 10 to expand and contract in the sealed pump chamber 23 and the liquid inlet channel in the housing 20, so that the liquid in the pump body flows rapidly in a certain direction. In order to prevent the tension spring 11 from directly contacting with the iron core 14 to form alternating stress and to prevent the tension spring 11 from exceeding its own fatigue resistance and direct contact, the first sealing ring 13 is provided at the abutment between the tension spring 11 and the first limiting step 42 inside the iron core 14. The tension spring 11 is indirectly in contact with the iron core 14 through the first sealing ring 13 to avoid direct contact between the tension spring 11 and the iron core 14, thereby reducing the relative friction between the tension spring 11 and the iron core 14, preventing cracks from appearing on the surface and sub-surface of the tension spring 11 and gradually extending along the original cracks, thereby extending the service life of the micro pump 100.

[0027] The electromagnetic drive assembly 40 is composed of a bracket, a coil, a first spring and a second spring. One end of the first spring and the second spring are respectively arranged at the two ends of the iron core 14, the other end of the first spring abuts against the inner wall of the sealed pump chamber 23, and the other end of the second spring abuts against the inner wall of the liquid inlet channel, so that the two ends of the iron core 14 are not in direct contact with the housing 20, which can reduce noise on the one hand, and on the other hand, the iron core 14 can be suspended in the liquid channel, so that the electromagnetic drive assembly 40 controls the iron core 14 more accurately. It is explained here that the arrangement of the tension spring 11, the compression spring 33, the first spring and the second spring does not affect the flow of liquid. The coil is arranged outside the bracket. When the coil is energized, the iron core is telescopically moved according to the principle of electromagnetic action and the elastic action of the spring, so that the liquid can flow along the direction of the liquid inlet channel, the sealed pump chamber 23 and the liquid outlet channel 24.

[0028] See also Figure 1In order to prevent the micro pump 100 from leaking, a second sealing ring 41 is provided between the iron core 14 and the housing 20 to prevent the liquid in the liquid channel from leaking through the gap between the iron core 14 and the housing 20, affecting the pumping effect of the pump body, thereby ensuring the sealing of the micro pump 100. Further, the sealing component 30 includes a sealing block 31, a rubber plug 32 and a compression spring 33. A liquid outlet is provided on the sealing block 31, and the liquid outlet is connected to the sealed pump chamber 23 and the liquid outlet channel 24. The top of the rubber plug 32 abuts against the compression spring 33, and the bottom is pressed against the liquid outlet by the elastic force of the compression spring 33, thereby increasing the liquid pressure in the pump body, increasing the kinetic energy of the liquid, and making the flow rate of the gushing liquid greater. One end of the compression spring 33 away from the rubber plug 32 abuts against the inner wall of the liquid outlet channel 24, so that the sealed pump chamber 23 is sealed during the non-working period, preventing foreign matter from falling into the sealed pump chamber 23, thereby avoiding pump body failure, thereby reducing the failure rate and improving the reliability of the product.

[0029] It should be noted that the natural length of the tension spring 11 is smaller than the length of the first through groove, and the tension spring 11 is always in a stretched state in the first through groove, so that the seal 12 and the second end of the tension spring 11 are pressed against the two ends of the first through groove. In the original state, the liquid is filled in the liquid channel, and the bottom of the rubber plug is elastically pressed against the inner wall of the liquid outlet hole by the compression spring. When the electromagnetic drive component 40 drives the iron core 14 to extend, the liquid flows in from the liquid inlet 21, and at the same time, the liquid in the liquid inlet channel and the sealed pump chamber 23 flows into the liquid outlet channel 24 from the liquid outlet hole through the push-open rubber plug 32, and the liquid in the liquid outlet channel 24 flows out from the liquid outlet 22 to the outside. After the operation is completed, the electromagnetic drive component 40 drives the iron core 14 to reset, and it goes back and forth. In addition, the sealed pump chamber 23 and the liquid inlet channel are connected through the first through groove and the second through groove inside the iron core 14.

[0030] In one embodiment, the end of the rubber plug 32 that abuts against the liquid outlet is set to be hemispherical, and the sealing block 31 is provided with a hemispherical groove at the end that abuts against the rubber plug 32. The hemispherical rubber plug 32 and the hemispherical groove match each other, so that the sealing performance of the rubber plug 32 and the sealing block 31 is better. Preferably, the rubber plug 32 and the sealing block 31 are made of plastic. In addition, please refer to Figure 1 When the electromagnetic drive assembly 40 drives the iron core 14 to extend, the iron core 14 will impact the sealing block 31 under the action of inertia. A second limiting step 43 abutting against the first limiting step 42 is provided on the sealed pump chamber 23. The second limiting step 43 is used to absorb the inertia of the iron core 14 to prevent the sealing component 30 from being impacted by the iron core 14, causing malfunction, thereby affecting the function of the micro pump 100.

[0031] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A miniature coffee pump with a prolonged service life, characterized in that: include: A housing, wherein a liquid inlet and a liquid outlet are provided at both ends of the housing, and a sealed liquid channel is provided inside the housing, wherein the liquid channel comprises a liquid inlet channel, a sealed pump chamber and a liquid outlet channel, wherein the liquid inlet channel, the sealed pump chamber and the liquid outlet channel are connected in sequence, wherein the liquid inlet is connected to the liquid inlet channel, the liquid outlet is connected to the liquid outlet channel, a sealing component is provided between the sealed pump chamber and the liquid outlet channel, and the sealing component is elastically provided at the connection between the sealed pump chamber and the liquid outlet channel; An electromagnetic drive assembly, the electromagnetic drive assembly comprising an iron core, for driving the telescopic mechanism; and A telescopic mechanism, the telescopic mechanism is telescopically arranged in the liquid inlet channel and the sealed pump chamber, and includes a tension spring, a sealing member and a first sealing ring. A first through groove and a second through groove are provided inside the iron core, and the sealed pump chamber and the liquid inlet channel are connected through the first through groove and the second through groove. The tension spring is arranged in the first through groove, and a first limiting step is provided between the first through groove and the second through groove. The sealing member abuts against the top of the first through groove. The tension spring includes a first end portion close to the sealed pump chamber and an opposite second end portion, and the first end portion is connected to the sealing member, and a limiting portion is provided at the second end portion. The first sealing ring is sleeved on the limiting portion, and the limiting portion abuts against the first limiting step through the first sealing ring.

2. The micro coffee pump with extended service life according to claim 1, characterized in that: A second sealing ring is arranged between the iron core and the shell.

3. The micro coffee pump with extended service life according to claim 1, characterized in that: The sealing component includes a sealing block, a rubber plug and a compression spring. The sealing block is provided with a liquid outlet hole, the liquid outlet hole connects the sealed pump chamber and the liquid outlet channel, the rubber plug elastically presses the inner wall of the liquid outlet hole through the compression spring, and one end of the compression spring away from the rubber plug abuts against the inner wall of the liquid outlet channel.

4. The micro coffee pump with extended service life according to claim 3, characterized in that: The end of the rubber plug abutting against the liquid outlet is set to be hemispherical, and the end of the sealing block abutting against the rubber plug is provided with a hemispherical groove.

5. The micro coffee pump with extended service life according to claim 1, characterized in that: The electromagnetic drive assembly also includes a first spring and a second spring, one end of the first spring and the second spring are respectively arranged at the two ends of the iron core, the other end of the first spring abuts against the inner wall of the sealed pump chamber, and the other end of the second spring abuts against the inner wall of the liquid inlet channel.

6. The micro coffee pump with extended service life according to claim 1, characterized in that: The sealed pump chamber is provided with a second limiting step abutting against the first limiting step.

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