Water pump

Abstract

The present invention relates to a water pump comprising: a can in which a rotor is rotatably accommodated and which includes a shaft support unit on which a rotor shaft is supported; a motor housing in which the can and a stator are disposed; a control unit housing coupled to one side of the motor housing in an axial direction thereof; a pin which has at least one portion disposed in the control unit housing and moves along the axial direction to be key-coupled to the rotor shaft when an external force is applied; and a plate spring which has at least one portion disposed in the control unit housing, is coupled to the can, and elastically supports the pin, wherein the pin can be pressed with a tool, allowing the rotor shaft to rotate to clear a jam caused by debris.

Description

water pump

[0001] The present invention relates to a water pump, and more specifically, to a water pump capable of removing sticking by applying an external force when sticking occurs due to foreign substances remaining in a liquid.

[0002]

[0003] A water pump is a device used to flow liquid or increase the pressure of a liquid.

[0004] Generally, water pumps utilize centrifugal force, where a rotating impeller pushes liquid radially outward from the center of the pump. The centrifugal force generated by the rotation of the impeller provides the fluid force that moves the liquid from the pump's inlet to the outlet. During this process, the velocity of the liquid increases, and high-pressure liquid can be generated.

[0005] Meanwhile, electric water pumps that use an electric motor to provide rotational force to the impeller are widely used. Electric water pumps rotate the rotor using the electromagnetic force between the rotor and the stator, and the rotor shaft and the impeller rotate together to generate centrifugal force.

[0006] However, failures may occur in water pumps as described above depending on the operating environment. Specifically, water pumps used to circulate water for heating and hot water supply in Air-to-Water Heat Pumps (AWHPs) are used intensively during the cold winter months, while usage tends to decrease significantly during the summer. In addition, if the water contains foreign substances such as lime, the water may evaporate and the lime may harden when not in use. If such foreign substances adhere between the rotor shaft and the bearing, the shaft may fail to rotate even when power is applied to the water pump.

[0007] In this regard, European registered patent EP 2808547B1 discloses a pump device capable of deblocking the shaft of a rotor.

[0008] The above pump device is equipped with a pin at one axial end of a can containing a rotor, and when the pin is pressed and rotated with a tool, it engages with the shaft of the rotor and rotates together, thereby relieving the sticking.

[0009] However, the above pump device has a limitation in that the number of parts increases because it must be equipped with a separate housing for guiding the axial reciprocating movement of the pin and a separate housing for sealing the pin.

[0010] In addition, there is a limitation in that additional processes, such as welding, are required to secure the cans and housings.

[0011] Meanwhile, European registered patent EP 3379084B1 discloses a hydraulic pump in which a pin is provided inside a can and can be relieved of sticking through the rotation of the pin.

[0012] However, the above pump has a limitation in that both the pin and the spring are placed inside the can, and the spring elastically supports the space between the bearing and the pin, so when an external force is applied, both the spring and the bearing can move, resulting in structural instability.

[0013] In addition, since the motor must be mounted after the pin is assembled inside the can and the spring is assembled, the assembly process is complex and there is a limitation in that the preload applied to the spring becomes unstable due to assembly errors.

[0014]

[0015] The present invention was created to improve upon the problems of conventional water pumps as described above, and aims to provide a water pump capable of resolving shaft seizure caused by foreign substances contained in the liquid.

[0016] In addition, the purpose is to provide a water pump that allows for easy insertion of a tool to resolve shaft seizing.

[0017] In addition, the purpose is to provide a water pump in which parts that resolve seizing can be uniformly assembled in a simple manner.

[0018] In addition, the purpose is to provide a water pump that can prevent damage to the part that relieves seizing due to liquid leakage.

[0019]

[0020] To achieve the above-mentioned purpose, the water pump according to the present invention comprises: a can including a shaft support portion in which a rotor is rotatably accommodated and a rotor shaft is supported; a motor housing in which the can and a stator are disposed inside; a control unit housing coupled to one side in the axial direction of the motor housing; a pin having at least a portion disposed in the control unit housing and moving along the axial direction to be key-coupled with the rotor shaft when an external force is applied; and a plate spring having at least a portion disposed in the control unit housing, coupled to the can, and elastically supporting the pin.

[0021] At this time, the pin may include: a head portion having a tool coupling groove formed therein to which at least a portion of the tool is coupled; a plunger portion extending along the axial direction from the head portion and formed with a diameter smaller than that of the head portion to be inserted into the can; and a shaft coupling portion in contact with the rotor shaft.

[0022] In addition, the pin may further include an O-ring that seals the outer surface of the plunger portion and the can.

[0023] Additionally, the pin may include a spring coupling portion disposed between the head portion and the plunger portion, formed with a diameter smaller than that of the plunger portion, to which the plate spring is coupled.

[0024] Meanwhile, the above-mentioned leaf spring may include: a pin receiving portion formed to allow at least a portion of the pin to pass through and in contact with the pin; and a can connecting portion formed by bending and extending from the pin receiving portion and coupled with the can.

[0025] At this time, the control unit housing may include a control unit housing body; and a pin receiving groove formed on the motor housing direction surface of the control unit housing body and receiving the pin.

[0026] In addition, the control unit housing may further include a tool insertion hole formed on the side opposite to the pin receiving groove of the control unit housing body and communicating with the pin receiving groove.

[0027] Accordingly, when the control unit housing is separated from the motor housing, the pin receiving groove may be exposed to the outside.

[0028] At this time, the inner diameter of the tool insertion hole may be smaller than the inner diameter of the pin receiving groove.

[0029] Meanwhile, the motor housing may include a spring receiving groove in which at least a portion of the leaf spring is received.

[0030] Meanwhile, the water pump according to the present invention may further include a bearing portion disposed between the shaft support portion and the rotor shaft.

[0031] Meanwhile, the above can may include a pin guide portion that is extended from the shaft support portion and to which at least a portion of the pin is movably coupled.

[0032] Therefore, when an external force is applied to the pin, the pin can rotate together with the rotor shaft.

[0033]

[0034] As explained above, according to the water pump of the present invention, a tool can be inserted through a tool insertion hole formed in the control unit housing, and the tool presses the pin to rotate the rotor shaft, thereby relieving sticking caused by foreign matter.

[0035] In addition, since the pin receiving groove is formed in the control unit housing rather than the motor housing, the pin can be assembled through a simple process of inserting the pin into the control unit housing and then joining the control unit housing and the motor housing.

[0036] In addition, an O-ring is fitted between the pin and the motor housing, which effectively prevents liquid leakage.

[0037]

[0038] FIG. 1 is a perspective view for explaining a water pump according to one embodiment of the present invention.

[0039] Figure 2 is an exploded perspective view of Figure 1.

[0040] Figure 3 is a cross-sectional view of Figure 1.

[0041] FIG. 4 is a perspective view for explaining a motor housing in a water pump according to one embodiment of the present invention.

[0042] FIG. 5 is a perspective view illustrating a control unit housing in a water pump according to one embodiment of the present invention.

[0043] Fig. 6 is a perspective view of Fig. 5 seen from a different direction.

[0044] FIG. 7 is a perspective view illustrating a pin and a plate spring in a water pump according to one embodiment of the present invention.

[0045] FIG. 8 is a perspective view illustrating the state in which a pin and a plate spring are combined in a water pump according to one embodiment of the present invention.

[0046]

[0047] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings.

[0048] The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. This is not intended to limit the present invention to specific embodiments, and should be interpreted to include all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention.

[0049] In describing the present invention, terms such as "first," "second," etc., may be used to describe various components, but said components may not be limited by said terms. Such terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component.

[0050] The term "and / or" may include a combination of multiple related listed items or any of the multiple related listed items.

[0051] When it is stated that one component is "connected" or "connected" to another component, it can be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it can be understood that there are no other components in between.

[0052] The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. Singular expressions may include plural expressions unless the context clearly indicates otherwise.

[0053] In this application, terms such as “comprising” or “having” are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not excluding in advance the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0054] Unless otherwise defined, all terms used herein, including technical or scientific terms, may have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries may be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and may not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0055] In addition, the following embodiments are provided to explain more completely to those with average knowledge in the industry, and the shapes and sizes of the elements in the drawings may be exaggerated for clearer explanation.

[0056]

[0057] FIG. 1 shows a perspective view for explaining a water pump according to one embodiment of the present invention, FIG. 2 shows an exploded perspective view of FIG. 1, FIG. 3 shows a cross-sectional view of FIG. 1, and FIG. 4 shows a perspective view for explaining a motor housing in a water pump according to one embodiment of the present invention.

[0058] A water pump (1) according to one embodiment of the present invention is described as follows with reference to FIGS. 1 to 4.

[0059] A water pump (1) according to one embodiment of the present invention includes a motor part (100), a pumping part (200), a control part (300), and a deblocking part (400).

[0060] A control unit (300) is disposed on one side of the axial direction of the motor unit (100), a pumping unit (200) is disposed on the other side of the axial direction of the motor unit (100), and a deblocking unit (400) can be disposed in the space formed by combining the motor unit (100) and the control unit (300).

[0061] For convenience, the direction in which the pumping unit (200) is positioned relative to the motor unit (100) may be called the upper side, and the direction in which the control unit (300) is positioned may be called the lower side. Specifically, the direction in which the pumping unit (200) is positioned relative to the length direction of the rotor shaft (141) may be called the upper side, and the direction in which the control unit (300) is positioned may be called the lower side.

[0062]

[0063] The motor unit (100) can be combined with the pumping unit (200) to provide rotational force to the pumping unit (200).

[0064] The motor unit (100) includes a motor housing (110), a stator (120), a can (130), and a rotor (140).

[0065] The motor housing (110) can form the exterior of the motor part (100). For example, the motor housing (110) can be formed in the shape of a roughly square block.

[0066] The motor housing (110) may accommodate a stator (120) inside. Specifically, the motor housing (110) may be molded with a bulk molding compound (BMC) to completely enclose the stator (120) and may include an outer wall (111), an inner wall (112), a bottom surface (113), and a top surface (114). Additionally, a can (130) may be placed in the inner space of the inner wall (112).

[0067] Meanwhile, the motor housing (110) of the present invention further includes a coupling guide portion (115). The coupling guide portion (115) may be formed to protrude downward from the base (113). The coupling guide portion (115) may be formed to protrude hollowly from the base (113) so that a plate spring (420) can pass through. For example, the coupling guide portion (115) may be formed to protrude in a rectangular shape with curved ends in the longitudinal direction from the base (113).

[0068] Accordingly, the leaf spring (420) can pass through the motor housing (110) along the coupling guide part (115) and be coupled to the can (130).

[0069]

[0070] The stator (120) is fixedly coupled inside the motor housing (110) and can rotate the rotor (140), which will be described later, by receiving power and using electromagnetic force. At this time, various types of known electric motors may be applied to the stator (120) and the rotor (140), and a detailed description is omitted.

[0071] Meanwhile, a can (130) is attached to the motor housing (110). The can (130) can be attached to the radially inner side of the inner wall (112).

[0072] The can (130) can rotatably accommodate the rotor (140). The can (130) can support the rotor shaft (141).

[0073] The can (130) includes a can body (131) and a flange (131a).

[0074] The can body (131) may be formed to accommodate a rotor (140) inside. For example, the can body (131) may be formed in the shape of a cylindrical pot. At this time, a shaft support (132) is formed at one axial end (lower end) of the can body (131), and a lower bearing (133) is placed between the rotor shaft (141) and the shaft support (132). The other axial end (upper end) of the can body (131) may be connected to a flange (131a). The flange (131a) may be coupled to the other axial end of the motor housing (110). Specifically, the flange (131a) may be formed to be bent and extended radially outward from the other axial end of the can body (131) to cover the upper surface (114) of the motor housing (110). Through this, the bonding strength between the can (130) and the motor housing (110) can be strengthened, and there is an advantage in that the bonding strength can be maintained even if rotational vibration of the rotor (140) occurs.

[0075] Meanwhile, a plate spring (420) may be attached to the lower surface of the can body (131) of the present invention. At this time, a spring fixing groove may be formed on the lower surface of the can body (131) to fix the plate spring (420). A fixing member, such as a screw or piece, that penetrates the plate spring (420) may be inserted and attached into the spring fixing groove. For example, a pair of spring fixing grooves may be formed at symmetrical positions centered on the pin guide portion (135). Through this, the plate spring (420) can be stably fixed and the position of the pin (410) can be guided.

[0076] Additionally, the shaft support (132) may be formed by bending and extending radially inward from one axial end (lower end) of the can body (131), and then bending and extending axially upward toward the rotor (140). That is, the shaft support (132) may be formed to form a step with the can body (131) at one axial end of the can body (131). At this time, the can body (131) may be formed with a larger diameter than the shaft support (132).

[0077] The shaft support (132) can accommodate a rotor shaft (141) and a lower bearing (133) inside.

[0078] At least a portion of the rotor shaft (141) can be accommodated at the radial center of the shaft support (132).

[0079] Meanwhile, a bearing (133, 136a) may be attached to the outer surface of the rotor shaft (141). The bearing (133, 136a) includes a lower bearing (133) and an upper bearing (136a).

[0080] Specifically, a lower bearing (133) may be coupled to the outer surface of the rotor shaft (141). That is, the lower bearing (133) is coupled to the radially inner side of the shaft support (132), and the axial other side of the rotor shaft (141) may be coupled through the radially center of the lower bearing (133). Through this, one axial side of the rotor shaft (141) can be supported.

[0081] The lower bearing (133) is positioned between the shaft support (132) and the rotor shaft (141) to reduce the frictional force generated during rotation of the rotor shaft (141).

[0082] The pin guide portion (135) may be formed by bending and extending downward from the radially inner end of the shaft support portion (132). The pin guide portion (135) may be formed by extending axially downward from the center of the shaft support portion (132) toward the control portion (300), and may be formed in a cylindrical shape.

[0083] At least a portion of the pin (410) can be accommodated inside the pin guide portion (135). Specifically, a plunger portion (413) can be accommodated inside the pin guide portion (135).

[0084] Accordingly, the plunger portion (413) can be reciprocated axially along the pin guide portion (135).

[0085] Meanwhile, the can (130) may further include a can cover (136). The can cover (136) may cover the axial other side (upper side) end of the flange (131a). For example, the can cover (136) may be formed in an annular shape. In this case, a radially inner portion of the can cover (136) may cover an open area of ​​the can body (131) that accommodates the rotor (140), and a radially outer portion of the can cover the flange (131a) of the can (130). That is, the can cover (136) may be placed between the can (130) and the pumping unit housing (210) of the pumping unit (200) to be described later.

[0086] At this time, an upper bearing (136a) may be attached to the radial center of the can cover (136), and a rotor shaft (141) may be received through the interior of the upper bearing (136a). In this case, the rotor shaft (141) may pass through the can cover (136) and be connected to an impeller (240) placed inside the pumping unit (200). Through this, the other axial side of the rotor shaft (141) may be supported.

[0087] The rotor (140) is placed inside the can (130) and can be rotated by the electromagnetic force with the stator (120) when power is applied.

[0088] At this time, the rotor (140) can be rotated with the rotor shaft (141) as the axis of rotation. The rotor (140) can be fixedly coupled to the rotor shaft (141) and rotated together. For example, the rotor (140) is formed in the shape of a cylindrical block, and the rotor shaft (141) can pass through the radial center portion of the rotor (140).

[0089] The rotor shaft (141) can be coupled with the rotor (140) to provide the rotation axis of the rotor (140). At this time, the other axial side of the rotor shaft (141) is supported by a can cover (136) and an upper bearing (136a), and the one axial side of the rotor shaft (141) can be supported by a shaft support (132) and a lower bearing (133). With this configuration, the rotor shaft (141) can be stably rotated with both axial sides supported.

[0090] The rotor shaft (141) may be formed in the shape of a column or cylinder. For example, the rotor shaft (141) may be hollow. With such a configuration, rotational performance can be maintained even if the volume of the shaft changes due to changes in ambient temperature.

[0091] Meanwhile, the motor unit (100) may be further equipped with a sealer (150). The sealer (150) may be placed at the top of the can (130). That is, the sealer (150) may be placed between the flange (130a) of the can (130) and the can cover (136). Through this, leakage of liquid between the pump unit housing (210) and the can (130) can be prevented.

[0092]

[0093] The pumping unit (200) is positioned on the other side of the axial direction of the motor unit (100) and can flow liquid by receiving rotational force from the motor unit (100).

[0094] The pumping unit (200) includes a pumping unit housing (210), an orifice (215), an inlet (220), an outlet (230), and an impeller (240).

[0095] The exterior of the pumping unit housing (210) of the pumping unit (200) can be formed, and a flow path through which liquid flows can be formed inside.

[0096] Specifically, the pumping unit housing (210) may be in the shape of a cylinder with its axial end closed. For example, the axial end of the closed pumping unit housing (210) may be in the shape of a dome or a flat plate.

[0097] Meanwhile, an inlet section (220) and an outlet section (230) may be disposed on the radial outer side of the pumping section housing (210). At this time, at least a portion of the inlet section (220) may be disposed further from the motor section (100) than the outlet section (230).

[0098] Additionally, an orifice (215) may be disposed inside the pumping unit housing (210). The orifice (215) can change the flow rate, hydraulic pressure, and flow rate of the liquid flowing within the pumping unit housing (210).

[0099] A space may be formed inside the pumping unit housing (210) to rotatably accommodate the impeller (240). That is, the internal space of the pumping unit housing (210) may be formed to have a diameter larger than the diameter of the impeller (240).

[0100] The internal space of the pumping unit housing (210) may be open to one side (lower side) in the axial direction. At this time, the diameter of the open space may be larger than the diameter of the impeller (240). With this configuration, when assembling the water pump (1) of the present invention, a worker can easily insert the impeller (240) into the pumping unit housing (210).

[0101] Meanwhile, the space formed inside the pumping unit housing (210) can be in communication with the flow path formed inside the inlet section (220) and the flow path formed inside the discharge section (230). Specifically, the center of the other axial end (upper end) of the space in the pumping unit housing (210) where the impeller (240) is accommodated can be open and communicate with the inlet section (220). In addition, a radially outer part of the space in the pumping unit housing (210) where the impeller (240) is accommodated can be formed with a larger diameter and communicate with the discharge section (230).

[0102] The inlet section (220) and the discharge section (230) may be provided so that liquid can flow inside. For example, the inlet section (220) and the discharge section (230) may be in the form of pipes. The inlet section (220) may be in communication with a flow path so that liquid can flow in. Additionally, the discharge section (230) may be in communication with a flow path so that liquid can be discharged. The liquid flowing through the inlet section (220) may flow into the upper space of the other axial end (upper side) of the impeller (240) in the pumping section housing (210). Additionally, the liquid flowing radially outward due to the rotational force of the impeller (240) may flow along the flow path within the pumping section housing (210) and be discharged to the discharge section (230).

[0103] The impeller (240) can rotate in conjunction with the rotation of the rotor (140). Specifically, the impeller (240) can be coupled with the rotor shaft (141) and rotate together with it. Since the rotor shaft (141) is fixedly coupled to the rotor (140), when the rotor (140) rotates due to electromagnetic force, the impeller (240) can also rotate together with it.

[0104] The impeller (240) can flow liquid by rotation. For example, the impeller (240) is shown with the edges on both sides in the axial direction closed, the upper surface formed to slope upward toward the radial inner side, and a blade-shaped wing provided inside, but is not limited thereto and various known types of impellers may be applied.

[0105] Accordingly, the liquid introduced through the inlet (220) can be pressurized by the impeller (240) in the internal space of the pumping unit housing (210) and then discharged through the discharge unit (230).

[0106]

[0107] Meanwhile, FIG. 5 shows a perspective view for explaining a control unit housing in a water pump according to one embodiment of the present invention, and FIG. 6 shows a perspective view of FIG. 5 viewed from a different direction.

[0108] Referring to FIGS. 5 and FIGS. 6, a control unit (300) according to one embodiment of the present invention is described as follows.

[0109] The control unit (300) is coupled to one side in the axial direction of the motor unit (100) and can control the rotation of the rotor (140). Specifically, the control unit (300) includes a control unit housing (310) and a control board (320).

[0110] The control unit housing (310) can form the exterior of the control unit (300). Additionally, the control unit housing (310) can form a space for accommodating a control board (320) inside. Specifically, the control unit housing (310) includes a control unit housing body (311), a pin receiving groove (312), and a tool insertion hole (313).

[0111] At this time, the control unit housing body (311) is formed in the shape of a roughly cuboid block, and a tool insertion hole (313) is formed on the lower side (one side in the axial direction), and a pin receiving groove (312) is formed on the upper side (the other side in the axial direction). Also, the tool insertion hole (313) and the pin receiving groove (312) can be connected to each other.

[0112] The control unit housing body (311) can be detachably coupled to one side in the axial direction of the motor housing (110). Specifically, at least one assembly hole (314) may be formed in the control unit housing body (311).

[0113] For example, the assembly hole (314) may be formed adjacent to the four corners based on the upper surface of the control unit housing body (311) in the shape of a cuboid block, and may be formed along the axial direction (up and down direction). In addition, an assembly guide groove (315) may be formed on the lower side of the assembly hole (314). The assembly guide groove (315) may be formed in a recessed shape along the up and down direction on the corner portion of the control unit housing body (311). Through this, the assembly hole (314) can be detachably coupled to the motor housing (110) by passing a coupling member such as a screw. Furthermore, an operator (assembler) can easily bring a tool such as a screwdriver into the assembly hole (314) along the assembly guide groove (315). Thus, assembly ease can be improved.

[0114] Meanwhile, the control unit housing body (311) includes an upper body and a lower body, and can accommodate a control board (320) and a component for operating the control board (320) in the internal space formed by combining the upper body and the lower body. At this time, the upper body and the lower body can be combined so as to be separable through a hook connection or the like.

[0115] The pin receiving groove (312) accommodates the pin (410), which will be described later, so that it can move back and forth. Specifically, the pin receiving groove (312) may be formed on the surface of the control unit housing body (311) in the direction of the motor unit (100).

[0116] At this time, the pin receiving groove (312) is formed by being recessed in the shape of a circular groove in the control unit housing body (311), and the inner diameter of the pin receiving groove (312) may be larger than the diameter of the pin (410) to be described later. Accordingly, the pin (410) can be received so as to be able to reciprocate linearly along the axial direction within the pin receiving groove (312). In addition, the pin receiving groove (312) may be formed by being further recessed in the coupling groove (316). At this time, the pin receiving groove (312) may be formed at the radial center position of the coupling groove (316).

[0117] Meanwhile, the depth of the recess in the pin receiving groove (312) may be smaller than the axial length of the pin (410). Accordingly, when the pin (410) is received in the pin receiving groove (312), the end portion of the pin (410) may protrude outward (upward) from the upper surface of the control unit housing (310).

[0118] Accordingly, in the present invention, when the control unit housing (310) is separated from the motor housing (110), the pin receiving groove (312) can be exposed to the outside, and the pin (410) and spring (420) can be mounted by a simple operation in which the operator (assembler) inserts the pin (410) and spring (420) into the pin receiving groove (312).

[0119] The tool insertion hole (313) is formed from one side of the control unit housing body (311) to allow the tool to pass through and can be connected to the pin receiving groove (312).

[0120] At this time, the inner diameter of the tool insertion hole (313) may be formed to be larger than the diameter of the tool. For example, the tool may be a screwdriver. Also, the inner diameter of the tool insertion hole (313) is smaller than the inner diameter of the pin receiving groove (312).

[0121] Additionally, the tool insertion hole (313) may be connected at the radial center of the pin receiving groove (312). That is, the pin receiving groove (312), which is circular or cylindrical in shape, and the tool insertion hole (313) may be arranged coaxially.

[0122] Through this, the tool can be inserted and connected to the pin (410) while the pin (410) cannot escape through the tool insertion hole (313), and the tool can be rotated with the upper end of the pin (410) combined with the lower end of the rotor shaft (141) by applying pressure to the lower end of the pin (410) to relieve the sticking of the rotor shaft (141).

[0123] Meanwhile, the control board (320) is placed within the control unit housing (310) and can control the motor unit (100). For example, the control board (320) may be a printed circuit board (PCB) of an inverter. An element capable of controlling the motor unit (100) may be mounted on the control board (320). Accordingly, the rotation of the motor unit (100) can be controlled by the operation of the control unit (300).

[0124] Meanwhile, the control unit housing (310) may be provided with a plurality of connectors (330). External power can be supplied to the control board (320) through the connectors (330), and control signals from the control board (320) can be sent to the motor unit (100). For example, at least one of the connectors (331) may be provided on the outer surface of the control unit housing (310), and at least a portion of the connector (331) may be positioned adjacent to the longitudinal end of the control board (320). Additionally, another of the connectors (332) may be provided on the upper surface of the control unit housing (310) and connected to a terminal (116) provided in the motor housing (110).

[0125] Meanwhile, a coupling groove (316) may be formed in the control unit housing (310). At least a portion of the plate spring (420) may be accommodated in the coupling groove (316). At this time, the plate spring (420) may be accommodated in the coupling groove (316) while coupled with the pin (410).

[0126] The coupling groove (316) accommodates the coupling guide portion (115). Specifically, the coupling groove (316) may be formed on the surface of the control unit housing body (311) in the direction of the motor portion (100).

[0127] At this time, the coupling groove (316) can be formed corresponding to the shape of the coupling guide part (115). For example, the coupling groove (316) can be formed by being recessed in the control unit housing body (311) in the shape of a square groove with curved ends in the longitudinal direction. Through this, the operator can easily recognize the coupling position of the motor part (100) and the control part (300).

[0128] Accordingly, when the motor part (100) and the control part (300) are combined, the coupling guide part (115) can be inserted and accommodated inside the coupling groove (316).

[0129] Meanwhile, in the water pump (1), sticking due to foreign matter may occur depending on the operating environment. For example, in the case of a water pump used for circulating water for heating and hot water supply in an air-to-water heat pump (AWHP), it is used intensively in winter when the temperature is low, and the frequency of use may be significantly lower in summer.

[0130] That is, if the liquid contains foreign substances that are prone to sticking, such as lime components, the water may evaporate and the foreign substances, such as lime, may harden in a high-temperature, dry environment or when not in use for a long period. Therefore, foreign substances may stick to the rotor shaft (141) of the water pump (1).

[0131] In this way, if foreign matter adheres between the rotor shaft (141) and the pumping unit housing (310) or between the rotor shaft (141) and the can (130), a phenomenon may occur in which the rotor shaft (141) cannot rotate even when power is applied.

[0132] To solve this, the present invention includes a deblocking part (400) to resolve the sticking of the rotor shaft (141).

[0133] In this regard, FIG. 7 shows an exploded perspective view to explain the pin (410) and the leaf spring (420) in a water pump according to one embodiment of the present invention, and FIG. 8 shows a perspective view to explain the state in which the pin (410) and the leaf spring (420) are combined in FIG. 7.

[0134] Referring to FIGS. 7 and FIGS. 8, the deblocking part (400) is described as follows. The deblocking part (400) can resolve the sticking of the rotor shaft (141).

[0135] The deblocking part (400) includes a pin (410), a leaf spring (420), and an O-ring (430).

[0136] The pin (410) may be positioned on one side in the axial direction of the shaft support (132). Specifically, at least a portion (lower portion) of the pin (410) may be received in the pin receiving groove (312) of the control unit housing (310). And, the remaining portion (upper portion) of the pin (410) may be positioned inside the pin guide portion (115).

[0137] The pin (410) can come into contact with the rotor shaft (141) by moving in the axial direction when an external force is applied. Specifically, when a tool is inserted through the tool insertion hole (313) and pressed upward, the pin (410) moves upward along the pin receiving groove (312), and the upper end of the pin (410) can come into contact with the lower end of the rotor shaft (141). The pin (410) includes a head portion (411), a tool coupling groove (412), a plunger portion (413), a shaft coupling portion (414), and an O-ring receiving groove (415).

[0138] At this time, the head portion (411) can be received in the pin receiving groove (312). The head portion (411) can be formed in the shape of a cylindrical block, and the upper surface of the head portion (411) can be elastically supported by contacting the plate spring (420).

[0139] At this time, the spring coupling portion (416) may be formed to extend upward along the axial direction from the head portion (411). For example, the spring coupling portion (416) may be formed in the shape of a cylinder with a reduced diameter from the head portion (411).

[0140] The spring coupling portion (416) can be positioned between the head portion (411) and the plunger portion (413). At this time, the diameter of the spring coupling portion (416) can be formed to be smaller than the diameter of the plunger portion (413).

[0141] Accordingly, when the pin (410) is inserted into the leaf spring (420), the upper surface of the head portion (411) can come into contact with the leaf spring (420). Additionally, the spring coupling portion (416) can be fitted into and come into contact with the leaf spring (420). With this configuration, the leaf spring (420) and the pin (410) can be stably coupled and supported.

[0142] The tool coupling groove (412) may be formed in the head portion (411). Specifically, the tool coupling groove (412) may be formed on the lower surface of the head portion (411). As an example, the tool coupling groove (412) may be a straight groove. As another example, the tool coupling groove (412) may be a cross-shaped groove.

[0143] At least a portion of the tool can be coupled to the tool coupling groove (412), and when the tool is rotated, the pin (410) can be rotated.

[0144] The plunger portion (413) may be formed to extend along the axial direction from the spring coupling portion (416). The plunger portion (413) may be formed to extend upward in the axial direction from the spring coupling portion (416). At this time, the diameter of the plunger portion (413) may be formed to be smaller than the diameter of the head portion (411).

[0145] The diameter of the plunger portion (413) may be smaller than the inner diameter of the pin guide portion (115). At this time, at least a portion of the plunger portion (413) may be inserted into the pin guide portion (115). Accordingly, when the head portion (411) is pressed, the plunger portion (413) may move upward along the pin guide portion (115).

[0146] The shaft coupling portion (414) can be formed at the axial upper end of the plunger portion (413).

[0147] The shaft coupling portion (414) may be in contact with the rotor shaft (141). The shaft coupling portion (414) may be in contact with the lower end of the rotor shaft (141).

[0148] At this time, according to the embodiment, a polygonal protrusion or groove may be formed on the friction part (414) to increase the frictional force with the rotor shaft (141). At this time, a polygonal groove or protrusion may be formed on the lower end of the rotor shaft (141) to mutually connect with the shaft coupling part (414).

[0149] Through this, when rotational force is applied to the head part (411) while the shaft coupling part (414) is in contact with the rotor shaft (141), the shaft coupling part (414) and the rotor shaft (141) can be connected and rotated together.

[0150] The O-ring receiving groove (415) may be formed by being recessed in the plunger portion (413). The O-ring receiving groove (415) may be formed by being recessed along the circumferential direction on the outer surface of the plunger portion (413).

[0151] Accordingly, the diameter of the plunger portion (413) at the location where the O-ring receiving groove (415) is formed can be reduced. Accordingly, an O-ring (430) can be coupled to the O-ring receiving groove (415), and the O-ring (430) can be prevented from coming off even if the pin (410) moves in a straight reciprocating motion along the axial direction.

[0152] The leaf spring (420) can apply a restoring force against the axial movement of the pin (410).

[0153] At least a portion of the leaf spring (420) may be placed within the pin receiving groove (312). Specifically, one axial end of the leaf spring (420) may be in contact with and supported by the pin (410), and the other axial end of the leaf spring (420) may be in contact with and supported by the can (130). More specifically, one axial end of the leaf spring (420) may be coupled with the spring coupling part (416), and the other axial end of the leaf spring (420) may be in contact with and supported by the lower surface of the can (130). At this time, a coupling guide part (115) may be formed in the motor housing (110) to accommodate the leaf spring (420) inside.

[0154] The leaf spring (420) includes a pin receiving portion (421) and a can connecting portion (422). The leaf spring (420) may be formed of an elastic material.

[0155] The pin receiving portion (421) may be formed to allow at least a portion of the pin (410) to pass through. For example, the pin receiving portion (421) may be formed in the shape of a flat plate, and a pin passing hole (421a) may be formed inside to allow the pin (410) to pass through. At this time, the minimum diameter of the pin passing hole (421a) may correspond to the diameter of the spring coupling portion (416). For example, the minimum diameter of the pin passing hole (421a) may be equal to the diameter of the spring coupling portion (416). Additionally, both sides in the longitudinal direction of the pin passing hole (421a) may be formed to communicate with a slit formed along the longitudinal direction of the plate spring (420). At this time, the diameter of the slit may be formed to be larger than the diameter of the plunger portion (413). Therefore, when combining the pin (410) and the leaf spring (420), the plunger portion (413), which has a larger diameter than the spring coupling portion (416), passes through the slit, and then slides so that the spring coupling portion (416) and the pin passage hole (421a) interlock with each other, thereby allowing for fastening by a press fit. Additionally, when the spring coupling portion (416) passes through the pin passage hole (421a), the leaf spring (420) undergoes elastic deformation, causing the slit to open and secure space. Thus, damage to the pin (410) or the leaf spring (420) can be prevented during the process of the pin (410) passing through the leaf spring (420).

[0156] The pin receiving portion (421) can be in contact with the pin (410). The pin receiving portion (421) can be in contact with the upper surface of the head portion (411). Additionally, the pin receiving portion (421) can be in contact with the outer surface of the spring coupling portion (416). Thus, the pin receiving portion (421) can elastically support the pin (410).

[0157] The can coupling portion (422) is formed by bending and extending from the pin receiving portion (421) and can be coupled with the can (130). For example, the can coupling portion (422) can be formed in a shape that is bent twice from the pin receiving portion (421). Through this, the can coupling portion (422) can be formed with a height difference from the pin receiving portion (421) and can apply a restoring force against the axial movement of the pin (410).

[0158] A coupling member passage hole (422a) may be formed in the can coupling portion (422). The coupling member passage hole (422a) may be formed as a circular hole, and a coupling member such as a screw or piece may pass through it. At this time, the slit may be connected to the coupling member passage hole (422a). Accordingly, the coupling member passage hole (422a) and the pin passage hole (421a) may be connected through the slit. This has the advantage of securing sufficient space for the slit to open.

[0159] The can coupling portion (422) can pass through the coupling guide portion (115) and be coupled to the lower surface of the can body (131).

[0160] The O-ring (430) can seal the space between the outer surface of the plunger portion (413) and the pin guide portion (135). For example, the O-ring (430) can be formed in a ring shape and coupled to an O-ring receiving groove (415) formed in the plunger portion (413).

[0161] At this time, the O-ring (430) can prevent liquid present in the motor part (100) and / or pumping part (200) from leaking between the rotor shaft (141) and the can body (131) and flowing into the control part (300).

[0162]

[0163] As described above, the process of assembling the pin (410) in the water pump (1) according to one embodiment of the present invention and the process of relieving sticking are explained as follows.

[0164] A worker (assembler) assembling a water pump (1) according to one embodiment of the present invention can insert a plate spring (420) into a coupling guide part (115) formed in a motor housing (110) and secure the plate spring (420) to a can (130) by coupling a coupling member such as a screw or piece.

[0165] Afterwards, the operator can insert the pin (410) into the pin through hole (421a) so that the spring coupling part (416) is fitted onto the plate spring (420).

[0166] After that, the operator positions the upper surface of the control unit housing (310) and the lower surface of the motor housing (110) so that they come into contact with each other. At this time, the hole formed in the motor housing (110) and the assembly hole (314) of the control unit housing (310) are aligned. Additionally, the coupling guide part (115) is aligned so that it is placed inside the coupling groove (316).

[0167] In this state, the worker can insert a connecting member, such as a screw, into the assembly hole (314) and complete the connection by rotating the connecting member with a tool such as a screwdriver.

[0168] Therefore, in the present invention, the pin (410) can be assembled through a simple process of inserting and joining the leaf spring (420) and the pin (410) from the outside of the motor housing (110).

[0169] Meanwhile, to resolve the sticking of the rotor shaft (141), the operator can first insert a tool into the tool insertion hole (313). When the tool passes through the tool insertion hole (313), it can come into contact with the head portion (411) of the pin (410). At this time, if the operator presses the tool further to apply pressure to the head portion (411) and rotates the tool, the blade of the tool presses the head portion (411) toward the motor housing (110), and at the same time, the tip portion of the tool rotates and is fitted into the tool coupling groove (412). Accordingly, the tool and the pin (410) begin to rotate in conjunction. Then, if the operator presses the tool further, the shaft coupling portion (414) of the pin (410) is coupled with the rotor shaft (141).

[0170] At this time, an external force is applied to the rotor shaft (141) in the axial direction by the pressure applied from the pin (410), and when the pin (410) rotates, a rotational force can also be applied to the rotor shaft (141) by the frictional force between the pin (410) and the rotor shaft (141).

[0171] As a result, as the tool, pin (410), and rotor shaft (141) rotate together, hardened foreign matter can be removed and the sticking of the rotor shaft (141) can be resolved.

[0172] That is, according to the present invention, when an external force is applied to the pin (410) through a tool, the pin (410) is coupled with the rotor shaft (141) and rotates together, thereby relieving the sticking.

[0173]

[0174] Although the present invention has been described in detail through specific embodiments, this is for the purpose of specifically explaining the invention and is not limited thereto. It is evident that modifications or improvements to the present invention are possible by those skilled in the art within the technical scope of the invention.

[0175] All simple variations or modifications of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be clarified by the appended claims.

Claims

1. A can comprising a shaft support that rotatably accommodates a rotor and supports a rotor shaft; A motor housing in which the above-mentioned can and stator are disposed inside; A control unit housing coupled to one side in the axial direction of the above motor housing; A pin having at least a portion disposed in the control unit housing and moving along the axial direction to be key-coupled with the rotor shaft when an external force is applied; and A plate spring having at least a portion disposed in the control unit housing, coupled to the can, and elastically supporting the pin; A water pump including 2. In Paragraph 1, The above pin is, A head portion having a tool coupling groove formed therein to which at least a portion of the tool is coupled; A plunger portion extending along the axial direction from the head portion and formed with a smaller diameter than the head portion to be inserted into the can; and A shaft coupling portion in contact with the rotor shaft above; A water pump including 3. In Paragraph 2, An O-ring that seals the outer surface of the plunger portion and the can; A water pump that further includes.

4. In Paragraph 3, The above pin is, A spring coupling portion disposed between the head portion and the plunger portion, formed with a diameter smaller than that of the plunger portion, to which the plate spring is coupled; A water pump including 5. In Paragraph 1, The above leaf spring is, A pin receiving portion formed to allow at least a portion of the pin to pass through and in contact with the pin; and A can coupling portion formed by bending and extending from the pin receiving portion and coupled to the can; A water pump including 6. In Paragraph 1, The above control unit housing is, Control unit housing body; and A pin receiving groove formed on the motor housing direction surface of the control unit housing body and receiving the pin; A water pump including 7. In Paragraph 6, The above control unit housing is, A tool insertion hole formed on the side opposite the pin receiving groove of the control unit housing body and communicating with the pin receiving groove; A water pump that further includes.

8. In Paragraph 6, A water pump characterized in that, when the control unit housing is separated from the motor housing, the pin receiving groove is exposed to the outside.

9. In Paragraph 7, A water pump characterized in that the inner diameter of the tool insertion hole is smaller than the inner diameter of the pin receiving groove.

10. In Paragraph 1, The above motor housing is, A spring receiving groove in which at least a portion of the above-mentioned plate spring is received; A water pump including 11. In Paragraph 1, A bearing disposed between the shaft support and the rotor shaft; A water pump that further includes.

12. In Paragraph 1, The above can is, A pin guide portion extending from the shaft support portion and movably coupled to at least a portion of the pin; A water pump including 13. In Paragraph 1, A water pump characterized in that when an external force is applied to the pin, the pin rotates together with the rotor shaft.

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