JP2023034216A - washing machine and pump - Google Patents

Abstract

To provide a washing machine which achieves saving of storage space around a liquid agent input device, and to provide a pump.SOLUTION: A washing machine includes a liquid agent input device 63 which has a pump 73 for sucking a liquid agent via a first flow passage 85a and discharging it to a second flow passage 86. The pump includes: a pump chamber 84 communicating with the first flow passage and the second flow passage respectively; a suction side check valve 95 for opening/closing the communication between the first flow passage and the pump chamber; and a discharge side check valve 96 for opening/closing the communication between the pump chamber and the second flow passage. The pump chamber is surrounded by a fixed part, and a movable part for reciprocating in a first motion direction and a second motion direction. In first relation between a first flow direction F1 in which the liquid agent flows from the first flow passage to the suction side check valve and the first motion direction, and in second relation between a second flow direction F2 in which the liquid agent flows from the discharge side check valve to the second flow passage and the second motion direction, the first flow direction and the first motion direction are different, or the second flow direction and the second motion direction are different.SELECTED DRAWING: Figure 12

Description

TECHNICAL FIELD The present disclosure relates to washing machines and pumps, and more particularly to washing machines and pumps for washing machines equipped with an automatic fluid dosing device.

For example, Patent Literature 1 discloses a washing machine equipped with a tank containing a liquid agent and an automatic liquid injection device for automatically supplying the liquid agent in the tank.

The washing machine disclosed in Patent Document 1 uses a piston pump unit to suck a predetermined amount of liquid agent from a suction water channel into a cylinder, and discharges the sucked liquid agent to a discharge water channel.

JP 2019-37358 A

However, in the washing machine described in Patent Document 1, the direction of suction into the cylinder and the direction of discharge are the same. A tank was arranged upstream of the liquid injection device, and a discharge channel was arranged downstream. Therefore, in order to accommodate the tank, the liquid material introduction device, and the discharge water channel without interfering with each other, either the path from the tank to the liquid material introduction device or the discharge water channel from the liquid material introduction device, or both, must be bent. I had a problem not to.

Accordingly, an object of the present disclosure is to solve the above problems, and to provide a washing machine and a pump that can save the storage space around the liquid agent feeding device.

A washing machine according to one aspect of the present disclosure includes an outer tub elastically supported in a housing, a tank containing a liquid agent supplied to the outer tub, and a first flow path communicating with a discharge portion for discharging the liquid agent from the tank. a liquid agent injection device having a pump that sucks the liquid agent through the second channel and discharges the liquid agent from the second flow path. The pump opens and closes the communication between the first flow path and the second flow path, and the pump chambers communicating with the first flow path and the second flow path, respectively, to pump the liquid agent from the first flow path to the pump chamber. and a discharge side check valve that opens and closes communication between the pump chamber and the second flow path to flow the liquid agent from the pump chamber to the second flow path. The pump chamber is a fixed portion and a movable portion that is continuously or sealably connected to the fixed portion and reciprocates in a first motion direction and a second motion direction to expand and contract the volume of the pump chamber. being surrounded. A first relationship between a first direction of flow of the liquid agent from the first flow path to the suction side check valve and a first direction of motion, and a first relationship between a first direction of movement of the liquid agent from the first flow path to the suction side check valve, and a first relationship between a first direction of movement of the liquid agent from the discharge side check valve to the second flow path. in a second relationship between a second flow direction of flow and a second direction of motion, wherein the first direction of flow and the first direction of motion are different in the first relationship, or the second direction of motion in the second relationship; The direction of flow and the second direction of motion are different.

A pump according to one aspect of the present disclosure is a pump that is used to put a liquid agent into a washing machine, sucks the liquid agent through a first channel, and discharges the liquid agent to a second channel. The pump opens and closes the communication between the first flow path and the second flow path, and the pump chambers communicating with the first flow path and the second flow path, respectively, to pump the liquid agent from the first flow path to the pump chamber. and a discharge side check valve that opens and closes communication between the pump chamber and the second flow path to flow the liquid agent from the pump chamber to the second flow path. The pump chamber has a fixed portion, and a movable portion that is continuously or sealably connected to the fixed portion and reciprocates in a first motion direction and a second motion direction to expand and contract the volume of the pump chamber. Consists of The pump chamber has a third channel that communicates a space between the movable portion and a first surface of the fixed portion facing the second movement direction side of the movable portion with the first channel. A first relationship between a first direction of flow of the liquid agent from the first flow path to the suction side check valve and a first direction of motion, and a first relationship between a first direction of movement of the liquid agent from the first flow path to the suction side check valve, and a first relationship between a first direction of movement of the liquid agent from the discharge side check valve to the second flow path. one end of the third flow path, in a second relationship between a second direction of flow and a second direction of motion, where the first direction of flow and the first direction of motion in the first relationship are different connects to the fixed part. The other end of the third flow path is connected to the surface of the fixed part facing the second movement direction side of the movable part, and one end of the third flow path is connected to the second movement direction side of the movable part. and the second movement direction side of the movable part at the bottom dead center of the movable part. Alternatively, if the second direction of flow and the second direction of motion in the second relationship are different, one end of the second flow path connects to the fixed portion. The other end of the second flow path is connected to the surface of the fixed part facing the second movement direction side of the movable part, and the one end of the second flow path is connected to the second movement direction side of the movable part. and the second movement direction side of the movable part at the bottom dead center of the movable part.

Advantageous Effects of Invention According to the present disclosure, it is possible to provide a washing machine and a pump that achieve space saving for storage around a liquid agent feeding device.

Schematic cross-sectional view of a washing machine of Embodiment 1 according to the present disclosure Schematic front view of washing machine Perspective view of automatic loading unit Perspective view of automatic loading unit Top view of automatic loading unit Perspective view of part of the automatic loading unit Perspective view of the case Partially exploded view of the tank, liquid material input device, and liquid material discharge channel Exploded view of a single tank and fluid dosing device Exploded view of a single tank and fluid dosing device Longitudinal section of a single tank and dosing device Schematic vertical cross-sectional view of the liquid injection device Perspective view of piston Exploded perspective view of piston Explanatory diagram showing the flow of suction and discharge of the liquid agent Explanatory diagram showing the flow of suction and discharge of the liquid agent Explanatory diagram showing the flow of suction and discharge of the liquid agent Explanatory diagram showing the flow of suction and discharge of the liquid agent Schematic longitudinal sectional view of a pump according to a modified example Schematic longitudinal sectional view of a pump according to a modified example Schematic cross-sectional view of an automatic feeding unit according to modification 1 Schematic cross-sectional view of an automatic loading unit according to modification 2 Schematic vertical cross-sectional view of a liquid agent injection device according to modification 2

(Embodiment 1)
A washing machine according to Embodiment 1 of the present disclosure will be described with reference to the drawings.

[overall structure]
FIG. 1 is a schematic cross-sectional view showing a washing machine 1 of Embodiment 1 according to the present disclosure. FIG. 2 is a schematic front view of the washing machine 1. FIG. The washing machine 1 of this embodiment is a washing/drying machine having a liquid agent automatic injection function. In this specification, the liquid agent is a liquid agent used for washing the laundry 15 such as clothes, and includes detergents, softeners, neutral detergents, and the like.

As shown in FIG. 1, the washing machine 1 includes a housing 2, an outer tub 3, an inner tub 4, a drive unit 5, an automatic loading unit 6, a connecting channel 8, a water supply port 10, and a drain. It has a valve 11 and a controller (not shown).

<Case>
The housing 2 is a member that forms the appearance of the washing machine 1 . An opening 20 and an openable/closable door 21 covering the opening 20 are provided on the front surface of the housing 2 .

<Outer tank>
The outer tub 3 is a substantially cylindrical member provided inside the housing 2 and having a function of storing washing water. The outer tank 3 may also be called a water tank. The outer tub 3 has a tubular portion 34 and a bottom portion 36 closing one end of the tubular portion 34 . A central axis V0 of the outer tub 3 passes through the center of the bottom portion 36 . The central axis V0 is tilted with respect to the horizontal. The outer tub 3 is elastically supported by dampers 30 and coil springs (not shown), and absorbs vibrations during washing and dewatering by the dampers 30 and coil springs. The outer tub 3 has an opening 31 at a position facing the opening 20 of the housing 2 and is hermetically connected to the opening 20 of the housing 2 by a bellows 32 . The outer tub 3 is further provided with openings 33 and 35 for water flow. The opening 33 is an opening connected to the connection channel 8, and the opening 35 is a drain port for draining the water in the outer tank 3 to the outside.

Further, in the following description, the horizontal direction along the central axis V0 is defined as the front-rear direction M (FIG. 1), and the horizontal direction orthogonal to the plane including the central axis V0 is defined as the width direction K (FIG. 2). The front-rear direction M has a front side M1 toward the opening 31 and a rear side M2 toward the bottom 36, and the width direction K has an outer side K1 away from the center axis V0 and a center side K2 toward the center axis V0.

<Inner tank>
The inner tub 4 is a substantially cylindrical member that is rotatable around the central axis V0 inside the outer tub 3 and accommodates laundry 15 such as clothes. The inner tank 4 may also be called a drum. A large number of through holes 40 are formed in the inner tank 4 . The through-holes 40 communicate the inner tub 4 and the outer tub 3 , allowing washing water to move from the inner tub 4 to the outer tub 3 and from the outer tub 3 to the inner tub 4 . The inner tub 4 further has an opening 41 at a position facing the opening 20 of the housing 2 and the opening 31 of the outer tub 3 .

<Drive unit>
The drive unit 5 is a member that drives the inner tank 4 to rotate. The drive unit 5 has, for example, a power unit that rotates the inner tank 4 . The power unit has, for example, a motor.

<Automatic input unit>
The automatic injection unit 6 is a unit for automatically injecting a predetermined amount of liquid agent from a liquid agent storage tank into the outer tank 3 . When the liquid agent is not manually introduced, the automatic input unit 6 supplies an appropriate type of liquid agent in an appropriate amount according to the amount and type of the laundry 15 during the washing process, rinsing process, etc., in the outer tub. Put in 3. The automatic dosing unit 6 is connected to the outer bath 3 via a connecting channel 8 in order to supply the liquid agent to the outer bath 3 .

The automatic injection unit 6 includes a case 61, tanks 62A, 62B, and 62C (FIG. 3), liquid agent injection devices 63A, 63B, and 63C (liquid agent injection devices 63B and 63C not shown), a liquid agent discharge channel 64, A manual input unit 65 and a water supply solenoid valve 66 are provided.

As shown in FIG. 2 , the automatic loading unit 6 is provided diagonally above the outer tub 3 inside the housing 2 . A bottom surface 55 of the case 61 has a shape along the outer circumference of the cylindrical portion 34 of the outer tub 3 . The bottom surface 55 is inclined downward toward the outer side K1. Further, as shown in FIG. 1, the bottom surface 55 is sloped downward toward the rear side M2. An upper portion of the automatic loading unit 6 faces an openable/closable cover 60 provided on the upper surface of the housing 2 .

<Connection channel>
The connection channel 8 is a channel for flowing the liquid agent from the automatic injection unit 6 to the outer tank 3 . The connection channel 8 extends downward from the liquid agent outlet 81 of the automatic injection unit 6 to the opening 33 of the outer tank 3 .

<Water supply port>
The water supply port 10 is a connection port for connecting a hose that supplies water to the outer tub 3 via the automatic feeding unit 6 . A water supply port 10 is provided in the upper portion of the housing 2 .

<Drain valve>
The drain valve 11 is configured to be openable and closable, and is a valve for draining water stored in the outer tub 3 through an opening 35 of the outer tub 3 when opened. A drain valve 11 is provided at the bottom of the housing 2 .

<Control part>
A control unit (not shown) is a member that controls the operation of the washing machine 1 . The control unit controls components of the washing machine 1 such as the drive unit 5, the liquid agent injection devices 63A, 63B, and 63C of the automatic injection unit 6, the water supply port 10, and the drain valve 11. The control unit includes, for example, a memory (not shown) storing a program and a processing circuit (not shown) corresponding to a processor such as a CPU, and the processor functions as these elements by executing the program. may

Next, constituent elements of the automatic injection unit 6 will be described with reference to FIGS. 3 to 6. FIG. 3 and 4 are perspective views of the automatic loading unit 6. FIG. FIG. 5 is a top view of the automatic loading unit 6. FIG. FIG. 6 is a perspective view of part of the automatic injection unit 6. FIG.

<Case>
As shown in FIG. 3, the case 61 is a member that accommodates the tanks 62A, 62B, and 62C that constitute the automatic loading unit 6, and the manual loading section 65. As shown in FIG. The bottom surface 55 of the case 61 is inclined outward K1 along the outline of the outer tub 3 schematically indicated by the dotted line. The upper part of the case 61 is open.

Here, the surface on the front side M1 of the case 61 is defined as a front surface 56, and the surface on the rear side M2 of the case 61 is defined as a rear surface 57. As shown in FIG. As shown in FIGS. 4 and 6, the back surface 57 of the case 61 is connected to liquid agent injection devices 63A, 63B, and 63C (FIG. 6), a liquid agent discharge channel 64, and a water supply electromagnetic valve 66 (FIG. 4). The channel 8 (FIG. 4) is connected.

As shown in FIG. 5 , a supply channel 67 is formed in the upper portion of the case 61 . The supply channel 67 forms a plurality of independent paths along the outer circumference of the case 61 . Each route supplies water from the water supply electromagnetic valve 66 to the inside of the case 61 .

<Tank>
The case 61 accommodates three tanks 62A, 62B, and 62C arranged side by side in the width direction K. As shown in FIG. Tanks 62A, 62B, and 62C are containers for storing liquid agents used in the washing process and the rinsing process. The tanks 62A, 62B, 62C have a substantially rectangular parallelepiped shape, and the longitudinal direction of the substantially rectangular parallelepiped is parallel to the front-rear direction M.

The tanks 62A, 62B, 62C are removable from the case 61. There is an empty space on the front side M1 of the case 61 when the manual insertion portion 65 is removed from the case 61 . As a result, the tanks 62A, 62B, 62C can be pulled forward M1 to be removed from the liquid agent charging devices 63A, 63B, 63C (FIG. 6) and taken out upward.

<Liquid injection device>
As shown in FIG. 6, the liquid agent injection devices 63A, 63B, 63C are devices that suck out a predetermined amount of liquid agent from tanks 62A, 62B, 62C and eject it into the liquid agent ejection channel 64. As shown in FIG. The liquid injection devices 63A, 63B, 63C are connected to respective tanks 62A, 62B, 62C via the rear surface 57 of the case 61. As shown in FIG. A liquid material introduction device 63A is connected to the tank 62A, a liquid material introduction device 63B is connected to the tank 62B, and a liquid material introduction device 63C is connected to the tank 62C. The liquid injection devices 63A, 63B, 63C are arranged side by side in the width direction K. As shown in FIG.

The detailed structures of the case 61, the tanks 62A, 62B, 62C, and the liquid injection devices 63A, 63B, 63C will be described later.

<Liquid agent discharge channel>
As shown in FIG. 6 , the liquid agent discharge channel 64 is a channel member that supplies the liquid agent and water to the outer tank 3 via the case 61 . The liquid agent discharge channel 64 is provided on the back surface 57 of the case 61 and connected to the three liquid agent injection devices 63A, 63B, and 63C. The liquid agent discharge channel 64 extends obliquely downward toward the outer side K1. The fluid flowing through the liquid agent ejection channel 64 flows in one direction according to the inclination of the liquid agent ejection channel 64 .

<Manual input unit>
As shown in FIG. 5, the manual input unit 65 is a mechanism for the user to manually input a liquid agent as a laundry treatment agent for one time each time the washing operation is performed. The liquid agent that is manually added flows into the outer tank 3 (FIG. 1) from the case 61 through the connecting channel 8 (FIG. 1) in the amount that was added. The liquid agent injected into the manual injection unit 65 may be liquid or powder. The manual loading unit 65 is detachably housed in the case 61 on the front side M1 of the tanks 62A, 62B, 62C.

<Water supply solenoid valve>
As shown in FIGS. 4 and 5, the water supply electromagnetic valve 66 is composed of three electromagnetic valves, and changes the route of the supply flow path 67 (FIG. 5) to which water is supplied by opening and closing each valve. Water flows into the outer tub 3 through the case 61 .

Next, the structure of the case 61 of the automatic loading unit 6 will be described in more detail with reference to FIG. FIG. 7 is a perspective view of the case 61. FIG.

As shown in FIG. 7, the case 61 has inner bottom surfaces B1, B2, and B3. The inner bottom surfaces B1, B2, B3 are arranged in order along the outer side K1. The inner bottom surface B1 is a surface positioned directly below the tank 62A (FIG. 6), the inner bottom surface B2 is a surface positioned directly below the tank 62B (FIG. 6), and the inner bottom surface B3 is a surface positioned directly below the tank 62C (FIG. 6). ). In other words, the inner bottom surfaces B1, B2, B3 form respective regions that accommodate tanks 62A, 62B, 62C, respectively.

Tank connection ports 77A, 77B, and 77C, a first case connection port 78, a second case connection port 79, and a liquid agent outlet 81 are formed on the rear surface 57 of the case 61 .

The tank connection ports 77A, 77B, 77C are openings provided for connecting the tanks 62A, 62B, 62C accommodated in the case 61 and the liquid material injection devices 63A, 63B, 63C arranged outside the case 61. is.

Also, the first case connection port 78 is an opening that allows water flowing from the supply channel 67 to flow into the liquid agent discharge channel 64 . The second case connection port 79 is an opening through which water from the liquid agent discharge channel 64 and the liquid agent that is automatically injected flow into the case 61 . The liquid agent outlet 81 is an opening through which the fluid that has flowed into the case 61 of the second case connection port 79 and the fluid from the manual input portion 65 is discharged through the connection channel 8 toward the outer tank 3 . The first case connection port 78 is provided at a position higher than the second case connection port 79 .

Here, the volumes of the tanks 62A, 62B, 62C will be explained. Returning to FIG. 5, the top surfaces of tanks 62A, 62B, 62C have a common shape. The dimensions of the tanks 62A, 62B, 62C in the width direction K and the front-rear direction M may be the same. Due to the common shape of the upper surface, the volume of tanks 62A, 62B, 62C increases along the outer side K1 according to their respective depths.

The three tanks 62A, 62B, 62C may contain different or the same liquid agents. Taking into consideration the types of liquid agents and the volumes of the tanks 62A, 62B, and 62C, the liquid agents may be stored in the tanks 62A, 62B, and 62C in order of decreasing frequency of use. For example, neutral detergent is stored in tank 62A, softener is stored in tank 62B, and detergent is stored in tank 62C.

Next, the liquid agent injection devices 63A, 63B, 63C connected to the tanks 62A, 62B, 62C will be described in more detail with reference to FIG. FIG. 8 is a partially exploded view of the tanks 62A, 62B, 62C, the liquid material input devices 63A, 63B, 63C, and the liquid material discharge channel 64. FIG. FIG. 9 is a rear view of the tanks 62A, 62B, 62C, the liquid material injection devices 63A, 63B, 63C, and the liquid material discharge channel 64. FIG. Here, the tank 62, the liquid agent injection device 63, and the connecting portion 76 are collectively referred to as the tanks 62A, 62B, 62C, the liquid agent injection devices 63A, 63B, 63C, and the connecting portions 76A, 76B, 76C, respectively.

As shown in FIG. 8, the liquid material injection devices 63A, 63B, and 63C are lowered outward K1 in accordance with the change in the depth of the connecting portion 76 of the tank 62 . The liquid agent injection devices 63A, 63B, and 63C are arranged so that the later-described liquid agent inlet 91 of the liquid agent injection device 63 faces the connecting portion 76 formed on the surface including the lateral direction of the tank 62 . In this embodiment, liquid agent injection devices 63A, 63B, and 63C are arranged stepwise.

Furthermore, tank 62 comprises a body 87 and a lid 88 . The upper portion of the main body 87 is open and covered with a lid 88 . Lid 88 is removably retained on main body 87 . As previously mentioned, the upper surfaces of tank 62 have a common shape, and thus the upper surfaces of body 87 have a common shape. Moreover, the structure for holding the lid 88 is also common. Therefore, the lid 88 of each tank 62 can be formed in common, and the lid 88 can be replaced. More specifically, the lid 88 of any tank 62A, 62B, 62C can be attached to any other tank 62A, 62B, 62C. On the other hand, the colors, patterns, letters, etc. attached to the lid 88 and other indications for improving the distinguishability of the tank 62 may be different. The lid 88 has a small lid 88A that can be opened and closed with respect to the lid 88 on the front side M1 of the tank 62. As shown in FIG.

Taking the liquid material injection device 63 connected to one arbitrary tank 62 as an example, the structure of one liquid material injection device 63 will be described in more detail with reference to FIGS. 9, 10 and 11. FIG. FIG. 9 is an exploded view of a single tank 62 and liquid injection device 63. FIG. FIG. 10 is an exploded view of a single tank 62 and liquid dosage device 63. FIG. FIG. 11 is a schematic cross-sectional view of the liquid material injection device 63 viewed from the outside K1.

As shown in FIGS. 9 and 10, the liquid injection device 63 is detachably connected to the rear surface 90 of the tank 62 along the front-rear direction M. As shown in FIGS. In other words, the tank 62 and the liquid injection device 63 connected to the tank 62 are arranged along the front-rear direction M, respectively.

As shown in FIG. 9 , the liquid injection device 63 includes a power section 71 , a reduction mechanism 72 , a pump 73 and a connection member 94 . The power unit 71 is an electronic component that rotationally drives the speed reduction mechanism 72 around the rotation axis V1. The reduction mechanism 72 is arranged around the power section 71 and is a mechanism that includes a plurality of reduction gears (not shown) and an output shaft V2 that rotates at a rotational speed lower than that of the power section 71 . The output shaft V2 is parallel to the rotation axis V1. By providing the speed reduction mechanism 72, the general-purpose power section 71 can be applied to the liquid agent injection device 63, and the cost of the automatic injection unit 6 can be suppressed. The power unit 71 and the reduction mechanism 72 may be collectively called a motor. The output shaft V2 of the reduction mechanism 72, ie, the motor, is connected to the pump 73 from the width direction K via an eccentric cam. The pump 73 is a positive displacement pump that sucks up and discharges the liquid agent from the tank 62 . When the rotary shaft V1 of the power unit 71 rotates, the output shaft V2 of the reduction mechanism 72 rotates, and the piston 83 of the pump 73, which will be described later, moves up and down.

The connection member 94 is a member that connects the liquid agent introduction device 63 to the tank 62 . The connecting member 94 includes therein a first channel 85 a that is part of the inlet channel 85 through which the liquid agent flows from the tank 62 to the pump chamber 84 of the pump 73 . The inlet flow path 85 is composed of a first flow path 85 a formed inside the connecting member 94 and a third flow path 84 f formed inside the pump case 93 .

One of the connection members 94 is fixed to the pump case 93 of the pump 73 and the other is attachable to and detachable from the connection portion 76 of the tank 62 . Thus, when the connection member 94 is directly connected to the pump case 93, the first flow path 85a can be made shorter.

The connection member 94 has a pin 94a for moving the tank discharge valve 62d arranged in the connection portion 76, which also functions as a discharge portion for discharging the liquid agent, from the closed state to the open state. When the connecting member 94 is attached to the connecting portion 76 of the tank 62 , the pin 94 a of the connecting member 94 moves the tank discharge valve 62 d, which is a check valve, to the front side of the tank 62 . As a result, the tank discharge valve 62d changes from the closed state to the open state, and the pressure of the liquid agent in the tank 62 causes the liquid agent to flow from the connecting portion 76 to the first flow path 85a.

Pump 73 will be described in more detail with reference to FIG. The pump 73 includes a piston 83 , a pump chamber 84 , a pump case 93 , a suction side check valve 95 and a discharge side check valve 96 .

The piston 83 is a member that is connected to the output shaft V2 of the reduction mechanism 72 and reciprocates within the pump chamber 84 in a first motion direction N1 and a second motion direction N2 as the output shaft V2 rotates. is. For example, the first direction of motion N1 is upward and the second direction of motion N2 is downward, so that the reciprocating direction N of the piston 83 is also upward and downward. Further, the reciprocating direction N of the piston 83 is not limited to the vertical direction, and may be the horizontal direction or the inclined direction. The internal pressure in the pump chamber 84 fluctuates due to the reciprocating motion of the piston 83 as a movable part. The piston 83 is connected with the pump case 93 via a seal 83e.

A pump case 93 as a fixed part has a pump chamber 84 inside, and further has a third flow path 84f and a second flow path 86 in which a discharge-side check valve 96 is arranged. . The pump chamber 84 is a space surrounded by the pump case 93 and the piston 83, and has a space S1 in which the liquid agent is sucked up and a third flow path 84f in which the suction side check valve 95 is arranged. The pump case 93 has a cylinder 84 a facing the sliding surface 83 d of the piston 83 and a bottom surface 84 b facing the bottom surface 83 a of the piston 83 . In the pump chamber 84, the liquid agent is sucked up from the third channel 84f into the space surrounded by the bottom surface 83a of the piston 83, the cylinder 84a, and the bottom surface 84b.

The inlet channel 85 is a channel that connects the tank 62 and the lower part of the pump chamber 84 in order to suck up the liquid agent from the tank 62 through the liquid agent inlet 91 . The liquid agent inlet 91 is inserted into the connection portion 76 of the tank 62 . The second channel 86 is a channel that connects the lower part of the pump chamber 84 and the liquid agent discharge channel 64 and extends vertically in order to discharge the liquid agent in the pump chamber 84 to the liquid agent discharge channel 64 . Since the inlet channel 85 is linearly arranged from the connecting portion 76 of the tank 62 to the suction side check valve 95, the inlet channel 85 can be made shorter. Although the inlet channel 85 is arranged horizontally in this embodiment, it may be arranged with an inclination of about several degrees. The suction side check valve 95 allows passage of the liquid agent from the first flow path 85a to the pump chamber 84 only in one direction. Also, the discharge-side check valve 96 allows passage of the liquid agent in only one direction from the pump chamber 84 to the second flow path 86 .

In the pump chamber 84, a part of the cylinder 84a and a part of the bottom surface 84b of the pump case 93 are formed with a suction-side opening 84c communicating with the third flow path 84f. One end 84fa of the third flow path 84f is located between the bottom surface 84b of the pump case 93 and the bottom surface 83a of the piston 83 at the bottom dead center of the piston 83 in a cross-sectional view. In other words, the radial end of the third flow path 84f on the side of the piston 83, the bottom surface 84b of the pump case 93, and the bottom surface 83a of the piston 83 at the bottom dead center of the piston 83 are substantially at the same height. Located in As a result, the third flow path 84f can be shortened, and the suction lift of the liquid agent can be reduced, so that a stable liquid agent ejection amount can be achieved even with a highly viscous liquid agent. The distance between the bottom surface 84b of the pump case 93 and the bottom surface 83a of the piston 83 at the bottom dead center of the piston 83 is the position of the bottom surface 84b of the pump case 93 and the position of the bottom surface 83a of the piston 83 at the bottom dead center. It also includes location. Therefore, when one end portion 84fa of the third flow path 84f is located flush with the bottom surface 84b of the piston 83 at the bottom dead center of the piston 83, or when the one end portion 84fa of the third flow path 84f is aligned with the pump chamber 84. The case where it is located on the same plane as the bottom surface 84b facing the bottom surface 83a of the piston 83 in is also included.

One end 84fa of the third flow path 84f is connected to the cylinder 84a of the pump case 93, and the other end 84fb of the third flow path 84f faces the second movement direction N2 side of the piston 83. It is connected to the bottom surface 84b of 93. The pump case 93 has a bent portion 84 e that faces the opening/closing direction of the suction side check valve 95 . Therefore, the bent portion 84e also faces the first flow direction F1. The bent portion 84e is, for example, a curved surface, and has a connecting portion 84ea and the other end portion 84fb as both ends thereof. A connecting portion 84ea of the bent portion 84e, which is connected to a surface 84g of the pump case 93 parallel to the first flow direction F1, has a curvature in a cross-sectional view. Further, the other end portion 84fb, which is also the connection portion of the bent portion 84e and is connected to the bottom surface 84b of the pump case 93 facing the second movement direction N2 side of the piston 83, also has a curvature.

Since both ends of the bent portion 84e have a curvature, it is possible to prevent separation of the liquid agent flowing from the third flow path 84f toward the piston 83 side. That is, it is possible to suppress the generation of vortices at both ends of the bent portion 84e and reduce the increase in pressure loss. In addition, since the bent portion 84e is formed with a curved surface, it is possible to prevent a sudden change in the cross-sectional area of the route and reduce an increase in pressure loss as compared with the case where the bent portion 84e is formed with a straight slope. .

A discharge side opening 84 d communicating with the second flow path 86 is formed in a part of the bottom surface 84 b of the pump case 93 . In a cross-sectional view, one end 84fa of the third flow path 84f is located closer to the piston 83 than the pump chamber 84 side end of the discharge side check valve 96 in the closed state. As a result, the one end 84fa of the third flow path 84f, the bottom surface 83a of the piston 83, and the end of the discharge-side check valve 96 on the pump chamber 84 side can be brought close to each other. The path from the outlet of 84f to the discharge side check valve 96 can be shortened, and the pressure loss of the liquid agent can be reduced. As a result, the load applied to the piston 83 can be reduced, and the discharge amount of the liquid agent can be further stabilized. Further, since the suction side opening 84c is larger than the discharge side opening 84d, pressure loss when the liquid agent is sucked into the pump chamber 84 can be reduced.

The suction side check valve 95 opens when the pressure in the pump chamber becomes negative due to the piston 83 rising from the bottom dead center. When the suction side check valve 95 is opened, the liquid agent flows from the first flow path 85 a into the third flow path 84 f in the pump case 93 and is sucked into the pump chamber 84 . As the piston 83 descends from the top dead center, the pressure in the pump chamber 84 becomes positive, and the suction side check valve 95 is closed.

A discharge-side check valve 96 is arranged in the second flow path 86 . The discharge side check valve 96 is closed when the pressure in the pump chamber 84 becomes negative due to the piston 83 rising from the bottom dead center. As the piston 83 descends from the top dead center, the pressure in the pump chamber 84 becomes positive and the discharge side check valve 96 opens. When the discharge-side check valve 96 is opened, the liquid agent sucked into the pump chamber 84 is discharged to the liquid agent discharge channel 64 .

In the pump 73, the direction of liquid agent suction by the suction side check valve 95 and the direction of liquid agent discharge by the discharge side check valve 96 intersect. It is possible to shorten the flow path bent from the liquid agent suction direction toward the piston 83 side, and to further reduce the liquid agent suction lift. In addition, the inlet channel 85 from the tank 62 to the pump chamber 84 and the second channel 86 through which the liquid agent is discharged from the pump chamber 84 are present on the same plane, and the inlet channel 85 and the second channel 86 are located on the same plane. are not parallel, the suction-side check valve 95 can be arranged along the linear flow of the liquid from the tank 62, and the suction lift of the liquid can be made smaller. In this embodiment, the liquid agent suction direction by the suction side check valve 95 and the liquid agent discharge direction by the discharge side check valve 96 are perpendicular to each other.

A part of the suction side check valve 95 in the open state or the closed state is included in a projection area Ar obtained by projecting the piston 83 in the second movement direction N2. As a result, the distance between the piston 83 and the suction side check valve 95 can be shortened, and the suction lift of the liquid agent from the third flow path 84f to the space S1 between the piston 83 and the bottom surface 84b can be reduced. can be done.

Next, the piston 83 will be described with reference to FIGS. 13 and 14. FIG. 13 is a perspective view of the piston, and FIG. 14 is an exploded perspective view of the piston.

The piston 83 has a piston body 83b and a lid 83c. The piston main body 83b has a recess 83ba at its bottom. The lid 83c is fixed so as to cover the recess 83ba. Both the piston body 83b and the lid 83c are made of resin, such as polyacetal resin (POM).

By having the recess 83ba in the bottom of the piston body 83b, it is possible to form the piston body 83b with high dimensional accuracy even when the piston body 83b is produced by die molding. However, when the piston main body 83b alone reciprocates, air accumulates in the recessed portion 83ba, which is one of the factors that cause variations in the amount of liquid to be sucked up. Therefore, by welding the lid 83c to the concave portion 83ba by ultrasonic waves, the concave portion 83ba in which the air is accumulated can be closed, and the variation in the amount of the liquid agent to be sucked can be reduced.

[motion]
Next, an example of the operation of the automatic loading unit 6 in the above configuration will be described with reference to FIGS. 4, 6, and 15 to 18. FIG. 15 to 18 are explanatory diagrams showing the flow of suction and discharge of the liquid agent.

The automatic loading unit 6 operates during the washing process and the rinsing process of the washing machine 1. - 特許庁The operation of the automatic injection unit 6 is controlled by the controller. The controller controls, for example, the opening and closing of the water supply solenoid valve 66, the type of liquid agent to be injected, the amount of injection, the timing of injection, and the like.

In the washing process and the rinsing process, the automatic charging unit 6 supplies water and liquid agents to the outer bath 3 . In order to perform automatic or manual dosing of detergent during the washing process, in FIG. 4, the first solenoid valve (not shown) of the water supply solenoid valve 66 is opened. In FIG. 6 , the water that has flowed into the case 61 flows from the liquid agent outlet 81 through the connection channel 8 into the outer tank 3 .

Next, the flow of the automatically injected liquid agent will be described in detail. Based on the selected operation course, the liquid injection device 63 connected to the tank 62 containing the corresponding liquid is driven by the command from the control unit. As shown in FIG. 12 , the power section 71 in the liquid injection device 63 rotates, and the rotation of the power section 71 is decelerated via the reduction mechanism 72 and transmitted to the piston 83 of the pump 73 .

As shown in FIG. 15, when the piston 83 is at the bottom dead center P1, pressure from the liquid agent in the pump chamber 84 closes the suction side check valve 95. The liquid medicine in the passage 85a cannot flow from the suction side check valve 95 to the third passage 84f.

As shown in FIG. 16, when the piston 83 rises from the bottom dead center P1 in the first movement direction N1, the pressure inside the pump chamber 84 becomes negative, and the suction side check valve 95 is opened. , the discharge-side check valve 96 is closed. As a result, the liquid agent in the first flow path 85a of the connecting member 94 flows into the third flow path 84f inside the pump case 93 and is sucked into the pump chamber 84 through the opening 84c. The sucked liquid agent is stored in the pump chamber 84 .

As shown in FIG. 17, when the piston 83 rises to the top dead center P2, the suction of liquid material into the pump chamber 84 stops.

As shown in FIG. 18, when the piston 83 descends from the top dead center P2 in the second motion direction N2, the pressure in the pump chamber 84 becomes positive, so that the suction side check valve 95 is closed and the discharge gas is discharged. The side check valve 96 is opened. As a result, the liquid agent sucked into the pump chamber 84 cannot flow toward the third flow path 84f, and is discharged from the pump chamber 84 to the second flow path 86 through the opening 84d. The liquid agent discharged to the second channel 86 flows to the liquid agent discharge channel 64 .

As shown in FIG. 6, the liquid agent flows along the inclined liquid agent discharge channel 64 along with gravity. The liquid agent may join the flowing water in the liquid agent discharge channel 64 . The liquid agent is guided from the second case connection port 79 shown in FIG.

When the piston 83 of the pump 73 descends to the bottom dead center P1, as shown in FIG. 15 again, the discharge of the liquid agent to the second flow path 86 stops.

Also, the liquid agent to be introduced into the outer tank 3 is determined based on the selected operation course. When washing is selected as the operation course, the operation of the control unit 12 in the washing process drives the liquid agent introduction device 63C (FIG. 9) connected to the tank 62C (FIG. 9) containing the detergent. When the fashionable washing is selected as the operation course, a neutral detergent may be put into the outer tub 3 . In this case, the liquid injection device 63A of the tank 62A containing the neutral detergent is driven. In the case of the rinsing process, the operation of the control unit drives the liquid agent introduction device 63B of the tank 62B containing the softener S2.

As the washing and rinsing steps are repeated, the amount of solution contained in tank 62 decreases. A user of the washing machine 1 can refill the tank 62 with the liquid agent. When the tank 62 is arranged in the case 61, as shown in FIG. 8, the small lid 88A can be opened to replenish the liquid agent. On the other hand, when the tank 62 is removed from the case 61, the liquid agent can be replenished by removing the lid 88 or opening the small lid 88A.

[effect]
According to the washing machine 1 according to Embodiment 1, the following effects can be obtained.

As described above, the washing machine 1 of this embodiment includes the outer tub 3, the tank 62, and the liquid agent injection device 63 (automatic liquid agent injection device). The outer tub 3 is elastically supported within the housing 2 . The tank 62 contains the liquid agent to be supplied to the outer tank 3 . The liquid agent injection device 63 has a pump 73 that sucks the liquid agent from the tank 62 via a first flow path 85a that communicates with a connection portion 76 that discharges the liquid agent and discharges the liquid agent to a second flow path 86 . The pump 73 opens and closes the communication between the pump chamber 84 communicating with the first flow path 85a and the second flow path 86, and the first flow path 85a and the pump chamber 84, thereby opening and closing the first flow path 85a. The suction side check valve 95 that flows the liquid agent from the pump chamber 84 to the pump chamber 84 opens and closes the communication between the pump chamber 84 and the second flow path 86 to flow the liquid agent from the pump chamber 84 to the second flow path 86. and a side check valve 96 . The pump chamber 84 is connected to a pump case 93 so as to be sealable with respect to the pump case 93, and reciprocates in a first movement direction N1 and a second movement direction N2 to expand and increase the volume of the pump chamber 84. It is surrounded by a piston 83 for contraction. A first relationship between a first flow direction F1 in which the liquid agent flows from the first flow path 85a to the suction side check valve 95 and a first movement direction N1, and a second relationship from the discharge side check valve 96. In the second relationship between the second flow direction F2 in which the liquid agent flows to the channel 86 and the second motion direction N2, the first flow direction F1 and the first motion direction N1 in the first relationship are different. .

With such a configuration, the movement direction of the first flow path 85a and the movement direction of the piston 83 are included in the pump 73 itself, so that the tank 62, the liquid agent introduction device 63, and the second flow path 86 It is possible to save space for storage with the downstream path. In addition, by including the opposite direction configuration in the pump 73 itself, it is possible to select an optimum layout of the pump 73 that reduces the pressure loss of the liquid agent flowing from the tank 62 to the second flow path 86 via the pump 73 . Further, by using such a pump 73 for the washing machine 1, it is possible to save space for housing the tank 62, the liquid material injection device 63, and the downstream path from the second flow path 86. FIG.

The pump chamber 84 also has a third flow path 84f that communicates the space between the piston 83 and the pump case 93 and the first flow path 85a. When the first flow direction F1 and the first movement direction N1 in the first relationship are different, one end 84fa of the third flow path 84f connects to the cylinder 84a of the pump case 93 and the third flow path The other end 84fb of 84f connects to the bottom surface 84b of the pump case 93 facing the piston 83 in the second movement direction N2. One end portion 84fa of the third flow path 84f is formed between the bottom surface 84b of the pump case 93 facing the second movement direction N2 side of the piston 83 and the second movement direction N2 side of the piston 83 at the bottom dead center of the piston 83. located between

With such a configuration, the distance between the suction side check valve 95 and the piston 83 or the distance between the discharge side check valve 96 and the piston 83 can be shortened, thereby reducing the pressure loss of the liquid agent flowing through the flow path. can do. As a result, the ejection amount of the liquid agent ejected from the liquid agent injection device 63 can be stabilized.

If the first flow direction F1 and the first movement direction N1 in the first relationship are different, the suction side check valve 95, in the open state or the closed state, is partially adapted to move the piston 83 in the second movement direction. It is included in the projection area Ar projected in the direction N2.

With such a configuration, the suction side check valve 95, the bottom surface 83a of the piston 83, and the end of the discharge side check valve 96 on the pump chamber 84 side can be brought close to each other. can be shortened from the outlet to the discharge side check valve 96, and the pressure loss of the liquid agent can be reduced. As a result, the load applied to the piston 83 can be reduced, and the discharge amount of the liquid agent can be further stabilized.

If the first direction of flow F1 and the first direction of motion N1 in the first relationship are different, the pump case 93 has a bend 84e facing the first direction of flow F1. A connection portion 84ea of the bent portion 84e with the surface 84g of the pump case 93 parallel to the first flow direction F1 and the other end portion 84fb, which is a connection portion of the bent portion 84e with the bottom surface 84b of the pump case 93, have a curvature. have

With such a configuration, since both ends of the bent portion 84e have curvature, it is possible to prevent separation of the liquid agent flowing from the third flow path 84f toward the piston 83 side. That is, it is possible to suppress the generation of vortices at both ends of the bent portion 84e and reduce the increase in pressure loss.

When the second flow direction F2 and the second movement direction N2 in the second relationship are the same, a part of the bottom surface 84b of the pump case 93 includes a space between the piston 83 and the bottom surface 84b of the pump case 93 and a first A discharge side opening 84d communicating with the flow path 86 of No. 2 is formed.

With such a configuration, the second flow direction F2 and the second movement direction N2 are the same, so the distance between the discharge side check valve 96 and the piston 83 can be shortened, reducing pressure loss and increasing the discharge amount. can be stabilized.

In addition, in the washing machine 1 of the present embodiment, the suction side check valve 95 is arranged on part of the surface of the pump case 93 facing the sliding surface 83d of the piston 83 and part of the bottom surface 84b of the pump case 93. A suction side opening 84c that communicates the third flow path 84f and the space S1 between the piston 83 and the bottom surface 84b of the pump case 93, and a discharge opening that communicates the pump chamber 84 and the second flow path 86. A side opening 84d is formed, and the opening 84c is larger than the discharge side opening 84d.

With such a configuration, the portion from the suction side check valve 95 to the pump chamber 84 in the third flow path 84f can be shortened, the pressure loss on the suction side can be reduced, and the liquid agent can be dissipated. Suction lift can be reduced.

In addition, in the washing machine 1 of the present embodiment, the first flow path 85a and the third flow path 84f are linearly arranged from the connection portion 76 of the tank 62 to the suction side check valve 95 .

With such a configuration, the inlet channel 85 can be shortened, and the suction lift of the liquid agent can be reduced. Moreover, the pressure loss from the tank 62 to the suction side check valve 95 can be reduced, and the discharge amount can be stabilized.

Moreover, the washing machine 1 of the present embodiment has a connection member 94 having one end connected to the tank 62 and the other end connected to the pump 73 . The connecting member 94 includes a first flow path 85a, and the pump case 93 internally includes a third flow path 84f.

With such a configuration, the tank 62 and the pump 73 are directly connected by the connecting member 94, so the first flow path 85a can be shortened. Further, since the space of the pump chamber 84 and the space in which the suction side check valve 95 reciprocates are both formed by the pump case 93, the third flow path 84f can be shortened. As a result, the suction lift of the liquid agent can be reduced.

Further, in the washing machine 1 of the present embodiment, the tank 62 has a tank discharge valve 62d that opens and closes the connection between the connection portion 76 of the tank 62 and the first flow path 85a. When 94 is connected to connection 76 of tank 92, it opens.

Further, in the washing machine 1 of the present embodiment, the attaching/detaching direction of the tank 62 and the reciprocating motion direction N of the piston 83 perpendicularly intersect. With such a configuration, the bulky piston 83 can be extended in a non-bulky direction with respect to the attachment/detachment direction, and the pump 73 can be made small in the attachment/detachment direction of the tank 62 . Therefore, it is possible to save space around the liquid injection device.

Further, in the washing machine 1 of the present embodiment, the piston 83 has a piston body 83b including a recess 83ba at its bottom, and a lid 83c covering the recess 83ba.

With such a configuration, it is possible to prevent air from accumulating in the recessed portion 83ba of the piston 83 and stabilize the amount of liquid agent to be sucked up.

Further, in the washing machine 1 of the present embodiment, the pump case 93 includes the second flow path 86 inside, and the discharge side check valve 96 opens and closes within the second flow path 86 .

With such a configuration, the space of the pump chamber 84 and the space in which the discharge side check valve 96 reciprocates are both formed by the pump case 93, so the second flow path 86 can be shortened. , the pressure loss of the liquid agent can be reduced.

Note that the present disclosure is not limited to the above-described embodiments, and can be implemented in various other modes.

In addition, in Embodiment 1, although the case where the automatic injection|throwing-in unit 6 has the three tanks 62 was demonstrated, it is not limited to such a case. The automatic dosing unit 6 may have two tanks 62 or four or more tanks 62 .

In addition, in Embodiment 1, although the pump 73 was described as a piston pump, it is not limited to this. The pump 73 may be a positive displacement pump, and may be a bellows pump as shown in FIGS. 19 and 20, for example.

19 and 20 are schematic longitudinal sectional views showing a pump 473 in a modified example. 19 shows the movable portion 482 positioned at the bottom dead center P1, and FIG. 20 shows the movable portion 482 positioned at the top dead center P2.

Pump 473 is a bellows pump. The pump 473 comprises a movable part 482 that moves along the direction N of reciprocating motion. The movable part 482 is connected to a rod 482a that reciprocates by the rotation of the output shaft V2, a bellows-shaped bellows 483 that expands and contracts by the reciprocating motion of the rod 482a, and the lower end of the rod 482a, and faces the bottom surface 84b of the pump case 493. and a surface 483a. One end of the bellows 483 is connected to the surface 483 a and the other end is continuously connected to the pump case 493 . The movable portion 482 expands and contracts the volume of the pump chamber 484 by reciprocating in the first movement direction N1 and the second movement direction N2.

In addition, in the first embodiment, the connection direction between the tank 62 and the liquid agent injection device 63 is the front-rear direction M, but the connection direction is not limited to this. For example, the connection direction between the tank 62 and the liquid injection device 63 may be along the vertical direction as in Modification 1 described later.

[Modification 1]
FIG. 21 is a schematic cross-sectional view of an automatic feeding unit 106 according to Modification 1. As shown in FIG. As shown in FIG. 21, Modified Example 1 differs from the automatic loading unit 6 of Embodiment 1 in that the tank 162 is removed from the case 161 in the vertical direction (Z direction). In order to remove the tank 162 in the vertical direction, the connection part 176 that connects with the liquid material injection device 163 is arranged on the bottom surface of the tank 162 . In Modification 1, the liquid injection device 163 is arranged below the tank 162 . A connecting member 194 extending linearly downward is connected to the connecting portion 176 arranged on the bottom surface of the tank 162 and the pump chamber 84 of the pump 73 , so that the inlet passage 185 extends downward from the tank 162 . there is The cylinder 84a of Modification 1 extends along the horizontal direction (X direction), and the first and second motion directions of the piston 83 are horizontal. The opening/closing direction of the suction side check valve 95 of Modification 1 is the vertical direction, and the opening/closing direction of the discharge side check valve 96 is the horizontal direction. Even in such a configuration, the suction lift can be reduced and the ejection amount of the liquid agent can be stabilized.

In the embodiment, an example in which the liquid agent injection device 63 is connected to the liquid agent discharge channel 64 on the outlet side has been described, but the present invention is not limited to this. For example, as in Modification 2 described later, the liquid injection device 63 may be connected to the case 61 directly below the tank 62 on the outlet side.

[Modification 2]
FIG. 22 is a schematic cross-sectional view of an automatic feeding unit 206 according to Modification 2. As shown in FIG. As shown in FIG. 22, the modification 2 differs from the automatic injection unit 6 of the first embodiment in that the liquid agent injection device 263 is directly connected to the case 261 on the outlet side. Even in such a configuration, the suction lift can be reduced and the ejection amount of the liquid agent can be stabilized. Further, instead of providing the liquid agent discharge channel 64 of the first embodiment, the inner bottom surface B200 directly below the tank 262 forms the liquid agent discharge channel 264 in the case 261 . With such a configuration, the structure of the automatic loading unit 206 can be simplified, and the number of parts and manufacturing cost can be reduced.

In Modified Example 2, the pump 273 of the liquid injection device 263 is arranged below the tank 262 . An L-shaped connecting member 294 connects the connecting portion 76 of the tank 262 and the pump chamber 284 of the pump 273 so that the inlet channel 285 extends horizontally from the tank 262 and further downward. The first motion direction of the piston 83 of Modification 2 is downward, and the second motion direction is upward. The opening/closing direction of the suction side check valve 295 of Modification 2 is the vertical direction, and the opening/closing direction of the discharge side check valve 296 is the horizontal direction.

FIG. 23 is a schematic vertical cross-sectional view of a liquid agent injection device 263 according to Modification 2. As shown in FIG. The pump 273 has a second relationship between the second flow direction F2 in which the liquid agent flows from the discharge-side check valve 296 to the second flow path 286 and the second movement direction N2. It differs from the second movement direction N2. With such a configuration, as in the first embodiment, the second flow path 286 and the movement direction of the piston 83 are included in the pump 273 itself, so that the tank 262, the liquid agent introduction device 263, It is possible to save a space for accommodating the downstream path from the second flow path 286 . In addition, by including the opposite direction configuration in the pump 273 itself, it is possible to select an optimum layout of the pump 273 that reduces the pressure loss of the liquid agent flowing from the tank 262 to the second flow path 286 via the pump 273 . Moreover, by using such a pump 273 for the washing machine 1, it is possible to save space for storing the tank 262, the liquid material injection device 263, and the path downstream from the second flow path 286. FIG.

One end 284fa of the second flow path 286 connects to the pump case 293 and the other end 284fb of the second flow path 286 connects to the bottom surface 284b of the pump case 293 . One end 284fa of the second flow path 286 is located between the bottom surface 284b as the first surface of the pump case 293 and the second movement direction N2 side of the piston 83 at the bottom dead center of the piston 83 .

When the second flow direction F2 and the second movement direction N2 are different, the discharge-side check valve 296 projects the piston 83 in the second movement direction N2 in the open state or the closed state. Included in the projection area Ar. As a result, the distance between the piston 83 and the discharge side check valve 296 can be shortened, and the pressure loss from the space S1 between the piston 83 and the bottom surface 284b to the discharge side check valve 296 can be reduced.

Further, when the second flow direction F2 and the second motion direction N2 are different, the pump case 293 has a bent portion 284e facing the direction opposite to the second flow direction F2. The bent portion 284e has a connection portion 284ea connected to a surface 284g of the pump case 293 parallel to the second flow direction F2, and the other end portion 284fb connected to the bottom surface 284b. The connecting portion 284ea and the other end portion 284fb have curvature.

Since both ends of the bent portion 284e have a curvature, it is possible to prevent the liquid agent flowing from the space S1 between the piston 83 and the bottom surface 284b to the discharge side check valve 296 from being separated. That is, it is possible to suppress the generation of vortices at both ends of the bent portion 284e and reduce the increase in pressure loss. In addition, since the bent portion 284e is formed with a curved surface, it is possible to prevent a sudden change in the cross-sectional area of the path and reduce an increase in pressure loss, compared with the case where the bent portion 284e is formed with a straight slope. .

When the first flow direction F1 and the first movement direction N1 in the first relationship are the same, a space (a third A suction-side opening 84c that communicates between the flow path 284f) and the space S1 between the piston 83 and the bottom surface 284b of the pump case 293 is formed.

Even in such a configuration, the suction lift can be reduced and the ejection amount of the liquid agent can be stabilized. In addition, although the inlet channel 285 is curved, the liquid agent flowing through the downwardly extending portion receives a positive pressure due to the influence of gravity. Therefore, it is beneficial for the suction performance of the pump 273 . Further, instead of providing the liquid agent discharge channel 64 of the first embodiment, the inner bottom surface B200 directly below the tank 262 forms the liquid agent discharge channel 264 in the case 261 . With such a configuration, the structure of the automatic loading unit 206 can be simplified, and the number of parts and manufacturing cost can be reduced.

Although the present disclosure has been fully described in connection with preferred embodiments and with reference to the accompanying drawings, various variations and modifications will become apparent to those skilled in the art. Such variations and modifications are to be included therein insofar as they do not depart from the scope of the invention as set forth in the appended claims.

Since the washing machine of the present disclosure can improve the function of the configuration related to liquid feeding, it can be Alternatively, it is useful as a dishwasher and a dishwasher. Further, the pump of the present disclosure is useful for these washing machines, washing and drying machines, or dishwashers and dishwashers.

1 washing machine 2 housing 3 outer tank 4 inner tank 6 automatic input unit 8 connection channel 61 case 62 tank 63 liquid material input device 64 liquid material discharge channel 66 water supply electromagnetic valve 71 power section 73 pump 76 connection section 77, 78, 79 Connection port 83 Piston 83a Bottom surface 83b Main body 83ba Recess 83c Lid 84 Pump chamber 84a Cylinder 84b Bottom surface 84c, 84d Opening 85 Inlet flow path 85a First flow path 86 Second flow path 93 Pump case 94 Connection member 95 Suction side non-return Valve 96 Discharge side check valve K Width direction M Front-back direction

Claims (13)

an outer tank elastically supported in the housing;
a tank containing the liquid agent to be supplied to the outer tank;
a liquid agent injection device having a pump that sucks the liquid agent through a first flow path that communicates with a discharge part that discharges the liquid agent from the tank and discharges the liquid agent into a second flow path;
The pump is
a pump chamber communicating with the first flow path and the second flow path, respectively;
a suction-side check valve that opens and closes communication between the first flow path and the pump chamber and allows liquid agent to flow from the first flow path to the pump chamber;
a discharge-side check valve that opens and closes communication between the pump chamber and the second flow path and allows the liquid agent to flow from the pump chamber to the second flow path;
The pump chamber includes a fixed portion,
The moving part is continuously or sealably connected to the fixed part and reciprocates in a first movement direction and a second movement direction to expand and contract the volume of the pump chamber,
A first relationship between a first flow direction in which liquid medicine flows from the first flow path to the suction side check valve and the first movement direction, and a first relationship between the first movement direction and the second direction from the discharge side check valve. In the second relationship between the second flow direction in which the liquid agent flows into the channel and the second movement direction,
wherein the first direction of flow and the first direction of motion in the first relationship are different, or the second direction of flow and the second direction of motion are different in the second relationship;
washing machine. the pump chamber has a third flow path that communicates between the space between the movable portion and the fixed portion and the first flow path;
if the first direction of flow and the first direction of motion in the first relationship are different,
one end of the third channel is connected to the fixed part;
the other end of the third flow path is connected to the first surface of the fixed portion facing the second movement direction side of the movable portion;
One end of the third flow path is positioned between the first surface of the fixed portion and the second movement direction side of the movable portion at the bottom dead center of the movable portion, or
if the second direction of flow and the second direction of motion in the second relationship are different,
one end of the second channel is connected to the fixed part;
the other end of the second flow path is connected to the first surface of the fixing portion;
one end of the second flow path is positioned between the first surface of the fixed portion and the second movement direction side of the movable portion at the bottom dead center of the movable portion;
The washing machine according to claim 1. When the first flow direction and the first movement direction in the first relationship are different, the suction side check valve is partially configured to move the movable portion to the second direction in the open state or the closed state. included in the projection area projected in the direction of motion, or
When the second flow direction and the second motion direction in the second relationship are different, the discharge-side check valve, in the open state or the closed state, has a portion that moves the movable portion to the second direction. Included in the projection area projected in the direction of motion,
The washing machine according to claim 1 or 2. if the first direction of flow and the first direction of motion in the first relationship are different,
The fixed part has a bent part facing the first flow direction,
The bent portion has a first connection portion that connects to a surface of the fixed portion parallel to the first flow direction, and a second connection portion that connects to the first surface of the fixed portion, The first connecting portion and the second connecting portion have a curvature, or
if the second direction of flow and the second direction of motion in the second relationship are different,
the fixed portion has a bent portion facing a direction opposite to the second flow direction,
The bending portion has a first connection portion that connects to a surface of the fixing portion parallel to the second flow direction, and a second connection portion that connects to the first surface of the fixing portion, wherein the first connecting portion and the second connecting portion have a curvature;
A washing machine according to any one of claims 1 to 3. if the first direction of flow and the first direction of motion in the first relationship are the same,
A suction-side opening that communicates between a space in which the suction-side check valve is arranged and a space between the movable portion and the first surface of the fixed portion in a part of the first surface of the fixed portion. is formed, or
if the second direction of flow and the second direction of motion in the second relationship are the same,
A part of the first surface of the fixed portion is formed with a discharge side opening that communicates a space between the movable portion and the first surface of the fixed portion with the second flow path,
A washing machine according to any one of claims 1 to 4. A space in which the suction side check valve is arranged in a part of a surface of the fixed part facing the sliding surface of the movable part and a part of the first surface of the fixed part, and the movable part. A suction side opening that communicates with the space between the fixed portion and the first surface and a discharge side opening that communicates the pump chamber and the second flow path are formed, and the suction side opening communicates with the discharge port. larger than the side opening,
A washing machine according to any one of claims 1 to 4. The first flow path is arranged linearly from the discharge portion of the tank to the suction side check valve,
A washing machine according to any one of claims 1 to 4. The liquid injection device has a connection member having one end connected to the tank and the other end connected to the pump,
The connection member includes the first flow path,
The washing machine according to claim 7. The tank has a tank discharge valve that opens and closes connection between the discharge part of the tank and the first flow path,
the tank discharge valve opens when the connecting member is connected to the tank discharge;
The washing machine according to claim 8. The mounting and demounting direction of the tank and the reciprocating direction of the movable part perpendicularly intersect,
A washing machine according to any one of claims 1 to 9. The movable part is a piston,
A washing machine according to any one of claims 1 to 10. The piston is
a piston body including a recess in the bottom;
a lid that covers the recess,
The washing machine according to claim 11. A pump that is used to put a liquid agent into a washing machine, sucks the liquid agent through a first flow path, and discharges the liquid agent to a second flow path,
The pump is
a pump chamber communicating with the first flow path and the second flow path, respectively;
a suction-side check valve that opens and closes communication between the first flow path and the pump chamber and allows liquid agent to flow from the first flow path to the pump chamber;
a discharge-side check valve that opens and closes communication between the pump chamber and the second flow path and allows the liquid agent to flow from the pump chamber to the second flow path;
The pump chamber includes a fixed portion,
a movable part that is continuously or sealably connected to the fixed part and reciprocates in a first movement direction and a second movement direction to expand and contract the volume of the pump chamber;
The pump chamber is a third flow that communicates a space between the movable portion and a first surface of the fixed portion facing the second movement direction side of the movable portion and the first flow path. have a road,
A first relationship between a first flow direction in which liquid medicine flows from the first flow path to the suction side check valve and the first movement direction, and a first relationship between the first movement direction and the second direction from the discharge side check valve. In the second relationship between the second flow direction in which the liquid agent flows into the channel and the second movement direction,
if the first direction of flow and the first direction of motion in the first relationship are different,
one end of the third channel is connected to the fixed part;
the other end of the third flow path is connected to the surface of the fixed portion facing the second movement direction side of the movable portion;
One end of the third flow path is connected to a surface of the fixed portion facing the second movement direction side of the movable portion and a surface of the movable portion facing the second movement direction at the bottom dead center of the movable portion. located between or
if the second direction of flow and the second direction of motion in the second relationship are different,
one end of the second channel is connected to the fixed part;
the other end of the second flow path is connected to a surface of the fixed portion facing the second movement direction side of the movable portion;
One end of the second flow path is formed between a surface of the fixed portion facing the second movement direction side of the movable portion and a surface of the movable portion facing the second movement direction at the bottom dead center of the movable portion. located between the side
pump.

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