JP2011000348A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine, in which water accumulated in a totally sealed injection water case is completely drained after completion of supply of water.SOLUTION: The washing machine includes a supply water device injecting washing water to a washing tub, the injection water case provided on the supply water device, having a plurality of shower water injection holes to spray washing water, and a supply water valve to supply tap water to the injection water case. The washing machine also includes an outside air displacement pipe upright in the injection water case, with an upper end side opened in the injection water case, and with the lower end side opened in an outside bottom part of the injection water case. The upper opening is sealingly closed with a lid, and a check valve is set on the lid that opens when the inner pressure of the injection water case has negative pressure and allows the outer air to flow into the injection water case.

Description

  The present invention relates to a washing machine provided with a water supply device that sprays shower-like water supply over a wide range of laundry in a washing tub.

  This washing machine is described in, for example, Japanese Patent Application Laid-Open No. 2001-340690 (Patent Document 1).

The washing machine shown in Patent Document 1 has a water injection device that pours washing water into the laundry in the washing tub.
And the water injection apparatus is provided with the water supply nozzle which has many watering holes above the washing tub, and is made to perform shower water injection with a water supply nozzle. Since the water permeates the entire laundry quickly by extensive watering by shower water injection, the detergent dissolves quickly and rinses quickly.

  In addition, water is poured into a detergent inlet installed on the side wall of the washing tub at the same time as water injection, and water is supplied while dissolving the detergent at the time of washing water supply, thereby promoting the dissolution time of the detergent and improving the washing performance.

JP 2001-340690 A

  A washing machine equipped with a water supply nozzle or water injection case for shower water injection has a problem that the water accumulated in the water supply nozzle or water supply case remains without being drained even after the water supply is completed.

  This is because the upper part of the water injection case body is completely sealed with an upper lid with packing in order to prevent water leakage during water injection. Due to this hermetic structure, when the water pressure is lowered after the water injection is completed, the water in the water injection case does not escape from the water spray hole having a small diameter. In addition, when the water in the irrigation case is slightly removed due to its own weight, it is considered that the inside of the irrigation case becomes negative pressure and remains in the irrigation case.

  An object of the present invention is to provide a washing machine provided with a water injection device that addresses the above-described problems and does not leave water in a water injection case.

  The present invention includes a water supply device that pours wash water into a washing tub, a water supply case that is provided in the water supply device and has a plurality of shower water injection holes for spraying the wash water, and a water supply valve that supplies tap water to the water supply case The washing machine is provided with an outside air replacement pipe that stands in the water pouring case, has an upper end opened in the water pouring case, and a lower end opened in an outer bottom portion of the water pouring case.

  In addition, the present invention provides a water supply device that pours washing water into a washing tub, a water injection case that is provided in the water supply device and has a plurality of shower water injection holes for spraying the washing water, and supplies tap water to the water injection case. A washing machine having a water supply valve, wherein a top valve of the water injection case is hermetically closed with a lid, and when the internal pressure of the water injection case becomes negative, a check valve is provided to open and flow outside air into the water injection case. The lid is provided on the lid.

  According to the present invention, since the inside of the water injection case is communicated with the atmosphere by the outside air replacement pipe, when the water supply valve is closed and the water injection is stopped, the water injection case does not become negative pressure, and the water accumulated in the water injection case does not remain. Discharged.

  In addition, when the internal pressure of the water injection case becomes negative, the check valve opens to allow outside air to flow into the water injection case, eliminating the negative pressure in the water injection case and discharging all the water accumulated in the water injection case. The

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of an entire washing machine according to an embodiment of the present invention. It concerns on the Example of this invention, and is a side view of the water injection case which concerns on the principal part of this invention. It is a figure which concerns on the Example of this invention, removed the cover body, and was the figure which looked at the water injection case from the upper side. The outside air replacement pipe is not shown. FIG. 5 is a longitudinal sectional view showing a state where water is sprayed in a water injection case, which is cited for comparison with the present invention. FIG. 5 is a right side view of FIG. 4 as viewed from the right, as a reference in comparison with the present invention. FIG. 5 is a longitudinal sectional view showing a state in which water remains in the water injection case, which is cited for comparison with the present invention. FIG. 7 is a right side view of FIG. 6 as viewed from the right, which is cited for comparison with the present invention. It is a longitudinal cross-sectional view concerning the Example of this invention, and provided the external air replacement pipe in the water injection case. FIG. 5 is a longitudinal sectional view showing a water draining state in which an outside air replacement pipe is provided in a water injection case according to an embodiment of the present invention. It is a longitudinal cross-sectional view which concerns on the Example figure of this invention, and showed the substitution state with the external pressure which provided the external air substitution pipe in the water injection case. It is related with the other Example figure of this invention, and is the longitudinal cross-sectional view which provided the non-return valve which replaces with external pressure at the cover body upper part in a water injection case.

  Hereinafter, examples according to embodiments of the present invention will be described with reference to the drawings.

  First, the outline of the washing machine will be described based on the longitudinal sectional view of the washing machine in FIG.

  The outer casing of the washing machine includes an outer frame 1, an outer frame base 2 that supports the outer frame 1 from below, a top cover 3 provided on the upper portion of the outer frame 1, and a top cover 3 that can be freely opened and closed. It has a lid 4. The outer tub 5 is supported in an anti-vibration manner via an anti-vibration spring 21 on a hanging rod 7 that hangs from a corner support 8 provided in the upper inner corner of the outer frame 1.

  The washing tub 9 is provided in the outer tub 5. A DC brushless motor 19 as a driving motor for washing and dehydration operation is provided at the bottom center of the outer tub 5. The DC brushless motor 19 is attached to the bottom center position of the outer tub 5 using a flange 20.

  The rotation main shaft 33 of the DC brushless motor 19 is fastened and fixed to the center bottom surface of the washing tub 9 and supports the washing tub 9. A rotation shaft (not shown) for rotating the stirring blade 11 is provided at the center of the rotation main shaft 33. The stirring blade 11 is provided at the center bottom of the washing tub 9 so as to be rotatable left and right. The stirring blade 11 is fastened and fixed to a rotating shaft (not shown) and rotates by the rotation of the DC brushless motor 19.

  The DC brushless motor 19 rotates a stirring blade that stirs the laundry at the time of washing by a rotation transmission switching means (not shown), and rotates the washing tub 9 at a high speed in the same direction at the time of the dehydration operation. It is configured to automatically switch so that the moisture of the laundry is dehydrated from the dewatering hole 12 by centrifugal force.

  When the power transmission of the DC brushless motor 19 is transmitted only to the inner rotation shaft provided on the rotation main shaft 33 by switching the rotation transmission switching means, the stirring blade 11 is stirred and rotated, and the laundry in the washing tub 9 is stirred. The stirring blade 11 applies mechanical force to the laundry and removes dirt adhered to the laundry by the action of the chemical force of water and detergent, and is washed.

  When the rotation of the DC brushless motor 19 is transmitted to the washing tub 9 by switching the rotation transmission switching means, the washing tub 9 is now rotated in one direction, and moisture contained in the laundry is dewatered by the centrifugal force 12. Dehydrated from.

  The vibration during the dehydration operation of the laundry 9 is provided with the balancer 10 in the upper part of the washing tub 9, so that the vibration during the high-speed dehydration and the abnormal vibration due to the unbalance of the laundry in the laundry tub 9 are alleviated.

  The control board 27 is provided on the front side of the top cover 3. The power switch 72 is provided on the control board 27. The power switch 72 is turned on, and various input switches provided on the control board 27 are operated to set the washing operation.

  The water level sensor 73 is provided on the front side of the top cover 3. The water level sensor 73 communicates with the air chamber 15 of the air trap 14 through the pressure tube 26.

  Due to the height stored in the outer tub 5, the air in the air chamber 14 is compressed to increase the air pressure P, and the water level sensor 73 controls the amount of water stored in the washing tub 9 by the air pressure P. The drain valve 22 communicates with a drain port 22a provided at the bottom of the outer tub 5, and drains from the drain hose 23 to the outside of the machine.

  That is, the water used for washing and rinsing is drained out of the machine through the drain hose 23 by the control operation of the drain valve 22.

  After drainage is completed, dehydration is performed to remove moisture from the laundry.

  The dehydration operation is performed with the drain valve 22 open. The control board 27 controls the opening and closing of the drain valve 22, the operation, stop and speed adjustment of the motor 19.

  The water injection device which is the main part of the present invention will be described.

  The water injection device has a water supply case 25, a water supply electromagnetic valve 6, and a water supply connection port 24 with a water tap. The water supply connection port 24 is connected to a water supply hose (not shown) and a faucet portion, and the tap water supplied from the water supply hose through the faucet passes through the water injection case 25 by opening the water supply electromagnetic valve 6 which is a water supply valve at the time of water supply. It is poured into the washing tub 9.

  The outer tank cover 13 is provided on the upper part of the outer tank 5. Even if the water flowing out from the water pouring case 25 deviates to the outside of the washing tub 9, it is protected by the outer tub cover 13 and poured into the washing tub 9. The detergent inlet 16 is provided on the inner peripheral side of the washing tub 9 so as to be located directly below the water injection case 25.

  The receptacle of the detergent inlet 16 opens toward the water injection case 25. The detergent inlet 16 has a communicating detergent flow path 17 extending downward along the body of the washing tub 9, and a detergent outlet 18 that opens to the outside of the bottom of the washing tub 9, between the washing tub 9 and the outer tub 5. The detergent is put into

  At the time of washing water supply, the chemical power of the detergent is poured into the detergent inlet 16 from the water pouring case 25, flows down the detergent flow path 17 and dissolves quickly in the washing water collected in the outer tub 5 from the detergent outlet 18. It effectively removes dirt on the laundry and provides a cleaning effect.

  The water pouring case 25 separates the shower-like shower sprinkler 28 and the detergent-dissolved pouring water 29 into the washing tub 9. The shower sprinkler 28 is sprinkled over the entire laundry present in the washing tub 9. The detergent-dissolved pouring water 29 is poured into the detergent inlet 16.

  Now, the water injection case 25 of the water injection device will be described in detail with reference to FIGS.

  The upper opening of the water injection case 25 is closed with a lid 101. The seal packing 121 seals the joint portion between the lid body 101 and the water pouring case 25 and prevents the tap water supplied to the water pouring case 25 from leaking from the joint portion.

  The lid 101 has a water supply pipe 102 on the upper surface. The water supply electromagnetic valve 6 described above is connected to the water supply pipe 102, and tap water is supplied to the water injection case 25 through the water supply pipe 102 when the water supply electromagnetic valve 6 is opened.

  As shown in FIG. 3, the water pouring case 25 has a water pouring chamber 112 for pouring water into the water pouring chamber 111 and the detergent dissolving pouring water 29. The partition plate 113 divides the inside of the water injection case 25 to form a water injection chamber 111 and a water injection chamber 112.

  The partition plate 113 is formed so as to stand straight from the inner bottom portion of the water injection case 25 toward the upper opening. The partition plate 113 has a communication path 114 in the center. The communication path 114 is formed so as to stand straight up and down from the lower end to the upper end of the partition plate 113. Since the partition plate 113 and the communication path 114 are formed so as to stand straight toward the upper opening of the water injection case 25, molding with a synthetic resin is easy.

  In the water injection case 25, the water injection chamber 111 sprays water toward the bottom side wall of the washing tub 9 in the form of a shower, and the water spray from the pouring chamber 112 is sprinkled into the detergent inlet 16 provided on the side wall of the washing tub 9.

  When washing water is supplied from the water injection case 25, the washing tub 9 is sprinkled while rotating in only one direction at a low rotation not exceeding 200 rpm. Even if it is provided in a part of the circumference, the detergent-dissolved pouring water 29 sprinkled from the water-filling case 25 can be poured into the detergent inlet 16 to dissolve the detergent.

  The water injection case 25 has the water injection chamber 111 as the front side and the water injection chamber 112 as the rear side.

  As shown in FIGS. 4 and 5, the detergent dissolving water injection hole 116 of the detergent dissolving pouring water 29 provided on the water injection chamber side is provided on the lower side of the rear side of the water injection case 25 where the water injection chamber 111 is present. 1 is poured into the detergent inlet 16 as detergent-dissolved pouring water 29 shown in FIG.

  Further, as shown in FIG. 2, the shower sprinkling hole 115 located at the front bottom portion of the water injection case 25 has an inclination of an angle θ that can spray water near the bottom corner portion of the washing tub 9.

  Further, the surface having an inclination of the angle θ has a curved shape spreading like a fan in the vicinity of the bottom surface of the washing tub 9 at the time of shower watering 28. This curve is formed along the radial direction intersecting with the rotation direction of the washing tub 9.

  A plurality of shower sprinkling holes 115 are provided on the curved surface. The shower sprinkling hole 115 has a smaller hole diameter than the detergent dissolution water injection hole 116 described above.

  The shower sprinkling hole diameter is about 0.8 to 1.5 mm, and at the time of shower sprinkling 28, water splash due to water pressure or the like is prevented.

  As shown in FIG. 3, the detergent dissolution water injection hole 116 and the shower water spray hole 115 provided on the lower side of the water injection case 25 are divided into two by the partition plate 113, and a plurality of holes are provided.

  Further, the water injection case 25 provided with the detergent dissolving water injection hole 116 and the shower water spray hole 115 is divided into a water injection chamber 111 and a water injection chamber 112 by a partition plate 113, and a communication passage 114 is provided at a substantially central portion.

  The water supply pipe 102 is provided in the upper part on the shower sprinkling hole 115 side divided by the partition plate 113.

  Since the diameter of the shower sprinkling hole 115 is 0.8 to 1.5 mm, the water supply pipe 102 is located on the shower sprinkling hole 115 side partitioned by the partition plate 113. When the water pressure supplied from the water supply pipe 102 is low, the diameter of the shower sprinkling hole 115 is small, so that the amount of the shower sprinkling 28 from the shower sprinkling hole 115 is prevented from decreasing.

  In addition, the communication path 114 provided from the upper part to the lower part in the central part of the partition plate 113 is for eliminating residual water remaining in the water injection chamber 111. The remaining water that cannot be removed from the water injection chamber 111 flows from the communication passage 114 to the pouring chamber 112 and is discharged to the water injection hole 116 having a diameter larger than that of the shower water spraying hole 115. There was no water left.

  Next, the reason why the water in the water injection case cannot flow out will be described with reference to FIGS.

  FIG. 6 shows a longitudinal sectional view of the water injection case 25 in a state where the water supply is stopped by operating the water supply electromagnetic valve 6 after the water supply into the washing tub 9 is finished, and FIG. 7 is a front view.

  When the water supply electromagnetic valve 6 is closed and the supply of water from the water supply pipe 102 to the water supply case 25 is stopped, the water supply case 25 has a lid 101 for preventing water leakage through the seal packing 121 as described above with reference to FIG. The water in the water injection chamber 111 and the water injection chamber 112 does not flow out. This is because the water injection case 25 becomes negative pressure due to the outflow of water, and the outflow is prevented.

  For this reason, the water in the water injection case 25 slightly flows through the water injection hole 116 and the shower sprinkling hole 115 by its own weight, but the water injection case 25 leaves the negative pressure cavity 200 at the water level H, and the residual water in the water injection case 25. To do. For this reason, the remaining water freezes in winter and the like, and watering becomes impossible when washing next time.

  Further, if left in this state for a long time, the remaining water in the water injection case 25 becomes more rotten than bacteria.

  The present invention solves the above-mentioned inability to flow out, and this will be described with reference to FIG. 8, FIG. 9, and FIG.

  FIG. 8 is a longitudinal sectional view of a water injection case 25 employing the present invention.

  When supplying water into the washing tub 9 when washing is too easy, water is supplied into the washing tub 9 from the water injection hole 116 provided at the bottom of the water injection case 25 and the shower sprinkling hole 115 by opening / closing the water supply electromagnetic valve 6. Is done.

  Water is injected from the water injection hole 116 into the detergent inlet 16 provided on the side wall of the washing tub 9 and from the shower sprinkling hole 115 to the laundry supplied into the washing tub 9 in a shower-like manner. On the rear water injection hole 116 side of the partition plate 113 in the water injection case 25, an outside air replacement pipe 201 having an inner diameter larger than that of the water injection hole 116 or the shower water spray hole 115 is provided toward the lid body 101.

  That is, the outside air replacement pipe 201 standing in the water injection case 25 is provided such that the upper end side opens into the water injection case and the lower end side opens to the outer bottom of the water injection case. The upper end side is located close to the ceiling surface of the upper lid.

  The height of the outside air replacement pipe 201 is higher than that of the partition plate 113, and is installed at a position higher than the residual water height H shown in FIG. The water supply at the time of washing too easily is poured into the washing tub 9 from the outside air replacement pipe hole 202 in the same manner as the water injection hole 116 and the shower sprinkling hole 115 of the water injection case 25 by the operation of the water supply electromagnetic valve 6.

  As shown in FIG. 9, when predetermined water is supplied into the washing tub 9, the water supply electromagnetic valve 6 is closed and the supply of water is stopped, and the water in the water injection case 25 is supplied from the water injection hole 116 or the shower water spray hole 115. Is also discharged from the outside air replacement pipe hole 202 having a large diameter.

  When the remaining water in the water injection case 25 is discharged from the outside air replacement pipe hole 202, the inside of the water injection case 25 communicates with the outside air through the hole 202 of the outside air replacement pipe 201 as shown in FIG. With this communication, the inside of the water injection case 25 has the same pressure as the outside air pressure, and the water remaining in the water injection case 25 is discharged from the water injection hole 116 and the shower sprinkling hole 115, and the remaining water in the water injection case 25 is not discharged. .

  As described above, since the upper end side of the outside air replacement pipe is located close to the ceiling surface of the upper lid, when the remaining water in the water injection case 25 slightly flows out of the outside air replacement pipe hole 202, the inside of the water injection case 25 communicates with the atmosphere. For this reason, the water in the water injection case 25 is reliably drained without causing poor drainage.

  The height of the outside air replacement pipe 201 is higher than that of the partition plate 113, and the upper end of the outside air replacement pipe 201 is about 9 mm higher than the upper end of the partition plate 113.

  The outside air replacement pipe hole 202 of the outside air replacement pipe 201 had a diameter of about 5 to 10 mm. The water injection hole 116 has a diameter of about 3 to 4 mm. The shower sprinkling hole 115 has a diameter of about 0.8 to 3 mm. The diameter of the outside air replacement pipe 201 is the largest, and the diameter of the shower sprinkling hole 115 is the smallest. The diameter of the water injection hole 116 is intermediate between the outside air replacement pipe 201 and the shower sprinkling hole 115.

  Further, the embodiment shown in FIG. 11 has a configuration in which a check valve is provided in the lid body 101 instead of the outside air replacement pipe 202 so that the inside of the water injection case 25 does not become the negative pressure cavity 200 when the electromagnetic water supply valve 6 is closed. It is what.

  As described above, the water injection case 25 and the lid 101 on the upper side are sealed via the packing 121 so that there is no water leakage.

  When the water supply solenoid valve 6 stops water supply, water in the water supply case 25 is slightly removed from the outside air replacement pipe hole 202, the water injection hole 116, and the shower water spray hole 115.

  At this time, the check valve 204 provided on the lid body 101 at the upper part of the water injection case 25 is opened, the outside air enters through the air hole 205 and the water injection case 25 does not become negative pressure, and the remaining water in the water injection case 25 Is completely drained.

  The inner volume of the water injection case 25 is about 400 cc. In the water injection case, shower watering is performed with about 400 cc of water fully filled.

  And when the water supply electromagnetic valve 6 was closed and water supply was stopped, the thing which is not equipped with the external air replacement pipe 201 had the malfunction that the water collected in the water injection case 25 did not escape.

  That is, when there is no check valve 204 provided in the outside air replacement pipe 201 or the lid 101, when the water supply electromagnetic valve 6 is closed and water supply is stopped, about 60 cc from the shower water spray hole 115 and the water injection hole 116. However, about 340 cc of water remains without being removed in the water injection case.

  Since the internal pressure of the water injection case 25 from which a little amount of water of about 60 cc has escaped becomes negative with respect to the atmospheric pressure, the water in the water injection case 25 can no longer escape.

In order to eliminate the negative pressure cavity 200 in the water injection case 25 which is the cause of the remaining water, a check valve 204 is provided in the outside air replacement pipe and the lid body 101.
In the water injection case 25, the atmospheric pressure is the same as the outside of the water injection case 25 through the vent holes of the outside air replacement pipe 201 and the check valve 204, and the negative pressure in the water injection case 25 is eliminated.

The water supply electromagnetic valve 6 is closed and water supply is stopped. About 60 cc of water is discharged from the water filling case 25 filled with tap water, the check valve 204 is opened, and the negative pressure cavity 200 is not generated.
For this reason, all the water in the water injection case 25 is removed from the shower sprinkling hole 115 and the water injection hole 116.

  In this way, the water injection case 25 provided with the shower water spray hole 115 having a small diameter for shower water spraying is provided with the outside air replacement pipe 201 and the check valve 204, so that the function of the shower water spray 28 is not impaired and the remaining water in the water spray case 25 is maintained. It can eliminate water problems and prevent defects such as freezing of residual water in winter.

  The bottom portion of the pouring chamber 112 where the water pouring hole 116 exists and the bottom portion of the pouring chamber 111 are flush with each other.

Further, the communication path 114 of the partition plate 113 is formed to the lower end of the partition plate 113.
A shower sprinkling hole 115 is provided at a position slightly raised from the bottom of the water injection chamber 111. For this reason, the residual water in the vicinity of the bottom of the water injection chamber 111 that is not sprinkled from the shower sprinkling hole 115 naturally flows from the communication passage 114 to the pouring chamber 112 and is discharged from the water injection hole 116 having a large diameter. The remaining water can be drained.

  The bottom portion of the pouring chamber 112 has a stepped structure in which the bottom portion of the pouring chamber 111 is lowered, and the remaining water can be drained without leaving any residue. However, the structure is simplified by making both the bottom portions flush as described above. Making it easier to make.

  The main function of the communication path 114 is to drain residual water remaining at the bottom of the water injection chamber 111. It is sufficient to provide the communication path 114 at the lower end of the partition plate 113. By providing the communication path 114 from the lower end to the upper end of the partition plate 113, it is easy to make the water injection case 25 molded with synthetic resin.

  The outlet of the water supply pipe 102 is provided above the water injection chamber 111. Since the water injection chamber 111 and the pouring chamber 112 communicate with each other through the communication path 114 of the partition plate 113, the shower sprinkling 28 is performed even if the outlet of the water supply pipe 102 is on the pouring chamber 112 side.

  The partition plate 113 is for partitioning the water injection chamber 111 and the water injection chamber 112, and the water supply of the water supply pipe 102 is directly supplied to the water injection chamber 111 rather than entering the water injection chamber 111 from the communication path 114. . By maintaining the width of the communication path 114 as narrow as possible, the original partition function of the partition plate 113 can be maintained and improved.

The vent hole of the outside air replacement pipe 201 has a hole size such as a water injection hole 116 or a shower sprinkling hole 115.
Bigger than. This enhances the air permeability of the outside air replacement pipe 201 and facilitates the residual water treatment by eliminating the negative pressure in the water injection case 25. That is, by enlarging the outside air replacement pipe hole 202 of the outside air replacement pipe 201, water can easily escape from the outside air replacement pipe hole 202, the inside of the water injection case 25 communicates with the atmosphere, and the negative pressure in the water injection case 25 is quickly increased. To be resolved.

  In the embodiment shown in FIG. 11, the check valve 204 and the outside air replacement pipe 201 are provided, but the check valve 204 alone may be used.

DESCRIPTION OF SYMBOLS 9 ... Washing tub 25 ... Water injection case 115 ... Shower water injection hole 116 ... Water injection hole 6 ... Water supply valve 201 ... Outside air replacement pipe 204 ... Check valve

Claims (6)

Washing machine comprising a water supply device for pouring wash water into a washing tub, a water supply case provided in the water supply device and having a plurality of shower water injection holes for spraying the wash water, and a water supply valve for supplying tap water to the water supply case There,
A washing machine comprising an outside air replacement pipe standing in the water injection case, having an upper end opened in the water injection case and a lower end opened in an outer bottom portion of the water injection case. Washing machine comprising a water supply device for pouring wash water into a washing tub, a water supply case provided in the water supply device and having a plurality of shower water injection holes for spraying the wash water, and a water supply valve for supplying tap water to the water supply case There,
The upper opening of the water injection case is hermetically closed with a lid,
A washing machine comprising an outside air replacement pipe standing in the water injection case, having an upper end opened near the lid in the water injection case, and a lower end opened at an outer bottom portion of the water injection case. Washing machine comprising a water supply device for pouring wash water into a washing tub, a water supply case provided in the water supply device and having a plurality of shower water injection holes for spraying the wash water, and a water supply valve for supplying tap water to the water supply case There,
The upper opening of the water injection case is hermetically closed with a lid,
The washing machine according to claim 1, wherein a check valve is provided in the lid body to open when the internal pressure of the water injection case becomes negative, and to let outside air flow into the water injection case. In the washing machine according to claim 1 or 2,
The washing machine according to claim 1, wherein the outside air replacement pipe has a pipe hole larger than the shower water injection hole or the detergent dissolution water injection hole. In the washing machine according to any one of claims 1 to 4,
2. The washing machine according to claim 1, wherein the water injection case has a detergent dissolving water injection hole for pouring detergent dissolving pouring water into a detergent inlet provided in the washing tub. In the washing machine according to claim 5,
2. The washing machine according to claim 1, wherein the tap water is poured into the washing tub after being divided into shower water from the shower water hole and the detergent dissolving water.

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