CN209733895U - Liquid feeding pump, liquid feeding system, washing machine and dish washing machine - Google Patents

Abstract

The utility model provides a charging pump, which comprises a pump shell; a cavity; a motor; and a transmission system coupled between the motor and the cavity and converting a rotational motion of the motor into a change in volume of the cavity, wherein an overall height of the transmission system in a direction of a normal to a plane formed by an axis of the motor passing through an output shaft thereof and an axis of the cavity parallel to a direction in which the volume of the cavity is changed is less than or equal to a diameter of the motor. The filling pump thus configured occupies a small volume, especially in a particular direction. Furthermore, the utility model discloses still provide a liquid dispensing system, a washing machine and a dish washer including this liquid feeding pump.

Description

Liquid feeding pump, liquid feeding system, washing machine and dish washing machine

Technical Field

The utility model relates to a liquid feeding pump still relates to a liquid dispensing system including this liquid feeding pump, a washing machine including this liquid dispensing system to and a dish washer including this liquid dispensing system.

Background

The liquid adding pump for washing machine, dish washer and other household appliances includes cavity for sucking and outputting liquid, motor for producing power, transmission system for transmitting the power produced by the motor to the cavity, etc. The existing charging pump occupies a large volume.

SUMMERY OF THE UTILITY MODEL

one aspect of the present invention provides a charge pump, which includes a pump housing; a cavity; a motor; and a transmission system coupled between the motor and the cavity and converting a rotational motion of the motor into a change in volume of the cavity, wherein an overall height of the transmission system in a direction of a normal to a plane formed by an axis of the motor passing through an output shaft thereof and an axis of the cavity parallel to a direction in which the volume of the cavity is changed is less than or equal to a diameter of the motor.

The filling pump thus configured occupies a small volume, especially in a particular direction. The charge pump thus configured is advantageously installed in electrical appliances such as washing machines, dishwashers and the like, in which it occupies a small volume.

The charge pump may also employ one or more of the following features to further reduce its footprint.

In some embodiments, the drive system includes a first stage worm gear.

In some embodiments, the transmission system consists of a first stage worm gear drive, a second stage gear drive, and a third stage gear drive.

In some embodiments, the worm gear of the first stage worm gear drive is arranged coaxially with the driving gear of the second stage gear drive, and the driven gear of the second stage gear drive is arranged coaxially with the driving gear of the third stage gear drive.

in some embodiments, the axis of the motor is parallel to the axis of the cavity.

In some embodiments, the motor, the transmission system, and the cavity are sequentially arranged in a U-shape.

In some embodiments, the priming pump further comprises: and the sensing device is used for sensing the change of the volume of the cavity, wherein the motor is a direct current motor.

Another aspect of the present invention provides a liquid dispensing system, which comprises the above-mentioned liquid feeding pump.

Another aspect of the present invention provides a washing machine, which includes the liquid dispensing system as described above.

another aspect of the present invention provides a dishwasher, comprising a liquid delivery system as described above.

drawings

in order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Throughout this specification, the same or similar components have the same or similar reference numerals.

fig. 1 is a perspective view of a charge pump according to a first embodiment of the present invention;

Figure 2a is a top view of a charge pump according to a first embodiment of the present invention;

Figure 2b is a side view of the charge pump according to the first embodiment of the invention, seen along the axis of the chamber;

Figure 2c is a side view, perpendicular to the chamber axis, of a charge pump according to a first embodiment of the invention;

Fig. 3 is an exploded perspective view of a charge pump according to a first embodiment of the present invention;

Fig. 4 is a perspective view of a charge pump according to a first embodiment of the present invention, with the first housing half removed;

Fig. 5 is a perspective view of a charge pump according to a first embodiment of the invention, with the pump housing removed;

Fig. 6 is a top view of a charge pump according to a first embodiment of the invention, with the pump housing removed;

Fig. 7 is a view of the charge pump according to the first embodiment of the invention, seen along the axis of the electric machine, with the pump casing removed;

figure 8a is a top view of a charge pump according to a first embodiment of the invention showing the sensing means and the pull rod moved to a first position;

Figure 8b is a top view of the charge pump according to the first embodiment of the invention showing the sensing means and the pull rod moved to a second position;

Figure 9a is a top view of a charge pump according to a second embodiment of the present invention showing a sensing device;

fig. 9b is a view of a sensing device according to a second embodiment of the present invention, seen along the axis of the electrical machine;

Figure 10 is a top view of a charge pump according to a third embodiment of the invention, with the pump housing removed;

Fig. 11 is a top view of a charge pump according to a fourth embodiment of the invention, with the pump housing removed.

List of reference numerals

pump housing 110

First half shell 111

Second housing half 112

End cap 113

electric machine 120, 220, 320, 420

Drive train 130, 230, 330, 430

first stage worm gear 131

Second stage gear drive 132

Third stage gear drive 133

Worm 134

Chambers 140, 240, 340, 440

Pull rod 141

Bellows 142

Liquid inlet and outlet 150

First sensing element 161

Second sensing element 162

second sensing element 262

Detailed Description

Hereinafter, a charge pump according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in conjunction with the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

the terminology used herein is for the purpose of explaining the embodiments and is not intended to limit and/or define the invention. It is to be understood that the terms "inner", "outer", "upper", "lower", and the like, refer to an orientation or positional relationship based on that shown in the drawings, or that is conventionally placed when the utility model is used, or that is conventionally understood by those skilled in the art, and are used merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Also, unless the context otherwise defines, the singular includes the plural. Throughout the specification, the terms "comprises," "comprising," "has," "having," "includes," "including," "having," "including," and the like are used herein to specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.

In addition, even though terms including ordinal numbers such as "first", "second", etc., may be used to describe various elements, the elements are not limited by the terms, and the terms are used only to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present invention.

Fig. 1-4 show perspective views of a charge pump according to a first embodiment of the invention. As shown in fig. 1-4, the charge pump includes a pump housing 110, a motor 120, a drive train 130, a cavity 140, and a liquid inlet and outlet 150.

the pump housing 110 includes a first half-shell 111, a second half-shell 112, and an end cover 113, and the first half-shell 111, the second half-shell 112, and the end cover 113 are mutually engaged to be fixed to each other and define a receiving cavity for receiving the motor 120, the transmission system 130, and the cavity 140. The first and second housing halves 111, 112 and the end cap 113 are secured together, for example by gluing, screwing, snapping or welding.

the transmission system 130 is coupled between the output shaft of the motor 120 and the draw bar 141 of the cavity 140 to convert the rotational motion of the motor 120 into the reciprocating motion of the draw bar 141 of the cavity 140. The chamber 140 may further include a bellows 142 having one end fixed to the rod 141 and reciprocating with the rod 141, wherein the bellows 142 is deformed during the reciprocating motion due to the circular motion of the one end of the rod 141. Further, the reciprocating motion of the draw rod 141 causes the volume of the cavity 140 to be changed to achieve the suction and output of the liquid from the liquid inlet and outlet 150. A liquid inlet and outlet 150 is provided at the end cap 113 and is in fluid communication with the cavity 140.

in this context, the axis of the motor 120 is defined as the axis passing through the output shaft thereof, and the axis of the cavity 140 is defined as the axis parallel to the direction in which the volume thereof changes (or the direction in which the draw rod 141 reciprocates). Fig. 5 and 6 show a perspective view and a plan view, respectively, of a priming pump according to the invention, with the pump housing 110 removed. As shown in fig. 5 and 6, the axis of the motor 120 is parallel to the axis of the cavity 140, and the motor 120, the transmission system 130 and the cavity 140 are arranged in a U-shape. The end surface of the cavity 140 opposite to the pull rod 141 and the end surface of the motor 120 opposite to the output end thereof form two ends of a U shape, respectively, which may be flush with each other or may be offset from each other by a distance.

Because the motor 120, the transmission system 130 and the cavity 140 are arranged in a U shape, the liquid adding pump can more effectively utilize the space, realize the miniaturization of the whole structure and be more beneficial to being installed on equipment such as electrical appliances.

the transmission system 130 includes a first stage worm gear drive 131, a second stage gear drive 132, and a third stage gear drive 133. In the first stage worm gear 131, a worm 134 is fixed to or integrally formed with an output shaft of the motor 120, the worm gear 134 is coaxially coupled with a driving gear in the second stage gear 132, i.e., a worm wheel 135, a driven gear in the second stage gear 132 is coaxially coupled with a driving gear in the third stage gear 133, and a driven gear in the third stage gear 133 is coupled to a pull rod 141.

The axis of the motor 120 and the axis of the chamber 140 are arranged to form a plane. Fig. 7 is a view of the charge pump according to the first embodiment of the present invention, viewed along the axis of the motor 120. Such as

As shown in fig. 7, in a normal direction of a plane formed by the axis of the motor 120 and the axis of the cavity 140 (in this example, the axis of the motor 120 and the axis of the cavity 140 are parallel, and thus, or in a cross section perpendicular to the axis of the motor 120 and the axis of the cavity 140), the overall train height of the transmission system 130, that is, the overall height of the transmission members (including gears, worm wheels, and worms) forming each stage of the transmission system, is designed to be smaller than or equal to the diameter of the motor. Therefore, the charging pump is further miniaturized in the height direction. In addition, the diameter of the motor is smaller than the whole height of the charging pump. The height of the charge pump in a particular direction is therefore particularly small, which is particularly advantageous in the case of a charge pump installed in the sandwich of a dishwasher or washing machine.

in order to sense the liquid feeding amount of the liquid feeding pump, the liquid feeding pump further comprises a sensing device. As shown in fig. 8a and 8b, the sensing device according to the first embodiment of the present invention includes a first sensing element 161 fixed to the pump housing 110 and a second sensing element 162 fixed to the pull rod 141, wherein the first sensing element 161 may be a hall element, and the second sensing element 162 may be a magnetic steel cooperating with the hall element.

Fig. 8a shows a top view of a filling pump comprising a sensor device according to a first embodiment of the invention, wherein the second sensor element 162 is moved with the pull rod 141 to the first position. Fig. 8b shows a top view of the charge pump comprising a sensor device according to the first embodiment of the invention, wherein the second sensor element 162 is moved with the pull rod 141 to the second position. As shown in fig. 8a, when in the first position, the pull rod 141 is in a maximum tension state, and at this time, the second sensing element 162 fixed to the pull rod 141 is closest to the first sensing element 161, and the magnetic field sensed by the first sensing element 161 is maximum. Such as

When in the second position, shown in fig. 8b, the drawbar 141 is in a maximum compressed state, in which the second sensing element 162 fixed to the drawbar 141 is furthest from the first sensing element 161 and the magnetic field sensed by the first sensing element 161 is minimal. Therefore, the sensing device can accurately sense the reciprocating motion period and/or speed of the pull rod 141 and feed relevant information back to the control device to control the output of the motor 120, so as to accurately control the dosage of the charging pump. In addition, since the second sensing element 162 is disposed on the pull rod 141, compared to the previous transmission position disposed on the output shaft or the transmission system, the sensing device can more accurately sense the reciprocating motion of the pull rod 141, and further sense the current amount of liquid to more accurately control the feeding amount of the liquid feeding pump.

preferably, the motor 120 that the liquid feeding pump according to the present invention adopts is a dc motor, and therefore, can provide a larger torque and output a larger flow rate while occupying the same volume, compared to a synchronous motor. At the same time, the sensing device allows the liquid adding pump using the dc motor 120 to achieve accurate liquid output.

fig. 9a and 9b show a sensor arrangement of a charge pump according to a second embodiment of the invention. Unlike the first embodiment, the second sensor element 262 of the sensor device of the charging pump according to the second embodiment is provided on the output shaft of the motor 220, and the first sensor element 261 is provided on the pump housing 110 in the vicinity of the second sensor element 262. Since the transmission ratio of the transmission 230 is constant, the sensed speed of the output shaft of the motor 220 can be used to control the output of the motor. To more effectively utilize space, the second sensing element 262 may be disposed on the side opposite to the output end of the motor 220. The first sensing element 261 may be a hall element, and the second sensing element 262 may be a magnetic ring, which may have one N pole and one S pole. With the rotation of the second sensing element 262, a high or low electric signal is generated when its N-pole is close to the first sensing element 261, and an opposite signal is generated when its S-pole is close to the first sensing element 261.

the sensing device is not limited to hall elements and magnetic steels, hall elements and magnetic rings, but may also include other components for sensing relative position or rotational speed, such as a reed pipe assembly.

In the second embodiment, the number of revolutions of the motor 220 corresponding to the pumping capacity to meet the end customer's demand can be represented by the following equation: n ═ Q (ni/Q) × Q. Where Q represents the pumping amount of the chamber 240 compressed once, i represents the transmission ratio of the transmission system, N represents the number of revolutions of the motor 220 corresponding to the pumping amount Q, Q represents the pumping amount required by the end customer, ni/Q is a constant value for the charge pump, and when the Q value is input, the N value can be obtained. When sensing that the number of rotations of the motor reaches N, the control means may control the motor to stop operating.

According to the utility model discloses an each part in the filling pump can have various different arrangements. Other arrangements of the liquid charging pump are described below, but the present invention is not limited thereto, and the arrangement of each component in the liquid charging pump can be adjusted according to the requirements of customers and the requirements of the electrical equipment and the like to which the liquid charging pump is to be installed.

Figure 10 shows a top view of a charge pump according to a third embodiment of the invention. As shown in fig. 10, in the charge pump according to the third embodiment, unlike the first embodiment, the motor 320, the transmission system 330, and the chamber 340 are arranged in an L-shape. The end surface of the cavity 340 opposite to the pull rod and the end surface of the motor 220 opposite to the output end thereof form two ends of an L shape, respectively.

figure 11 shows a top view of a charge pump according to a fourth embodiment of the invention. As shown in fig. 10, in the charge pump according to the fourth embodiment, unlike the first embodiment, the motor 420, the transmission system 430, and the chamber 440 are arranged in a Z-shape. The end surface of the cavity 440 opposite to the drawbar and the end surface of the motor 420 opposite to the output end thereof form two ends of a Z-shape, respectively.

furthermore, in other embodiments, the motor 420, the transmission system 430, and the cavity 440 may be in a linear arrangement, i.e., the motor 420, the transmission system 430, and the cavity 440 are arranged in a straight line.

The liquid adding pump can be used in household appliances such as washing machines or dish washing machines. For example, a priming pump included in a washing machine may be used to automatically dispense laundry detergent into the washing machine. As another example, a charge pump included in a dishwasher may be used to automatically dispense wash liquor into the dishwasher.

The scope of the present invention is defined not by the above-described embodiments but by the appended claims and equivalents thereof.

Claims (10)

1. a charge pump, comprising:

A pump housing;

A cavity;

a motor; and

A transmission system coupled between the motor and the cavity and converting a rotational movement of the motor into a change in volume of the cavity, wherein,

The overall height of the transmission system in the direction of the normal of the plane formed by the axis of the motor and the axis of the cavity is smaller than or equal to the diameter of the motor, the axis of the motor passes through the output shaft of the motor, and the axis of the cavity is parallel to the direction of the change of the volume of the cavity.

2. Filling pump according to claim 1,

The transmission system comprises a first stage worm gear.

3. Filling pump according to claim 2,

The transmission system is composed of a first-stage worm gear and worm transmission, a second-stage gear transmission and a third-stage gear transmission.

4. Filling pump according to claim 3,

The worm wheel in the first-stage worm wheel and worm transmission is coaxially arranged with the driving gear in the second-stage gear transmission, and the driven gear in the second-stage gear transmission is coaxially arranged with the driving gear in the third-stage gear transmission.

5. Filling pump according to claim 1,

The axis of the motor is parallel to the axis of the cavity.

6. Filling pump according to claim 5,

The motor, the transmission system and the cavity are sequentially arranged in a U shape.

7. the charge pump of claim 1, further comprising:

sensing means for sensing a change in volume of the cavity, wherein,

The motor is a direct current motor.

8. a liquid delivery system, comprising:

The charge pump according to any of claims 1 to 7.

9. A washing machine, characterized by comprising:

The liquid delivery system of claim 8.

10. A dishwasher, comprising:

The liquid delivery system of claim 8.