TWM459381U - Automatic drainer for air conditioner - Google Patents

Description

Air conditioner automatic drainer

The present invention relates to a container that can be automatically drained.

Generally, the air conditioner installed indoors lacks an appropriate way for drainage. It is often necessary to set a container in the room to collect the condensed water discharged from the air conditioner. It is both cumbersome and inconvenient and wasteful after the condensed water in the container is full. Time, if you forget to pour water, it will cause water to fill the ground and increase the trouble of cleaning up.

At present, most of the air-conditioner condensate containers that can be automatically drained on the market use unpowered siphon drainage. That is, a condensate inlet pipe and a drain pipe which extend into the casing are set on the hollow casing, and a check valve called a siphon type valve is set in the drain pipe. However, in actual use, the structure of the siphon valve is not tight enough, the siphon valve is easy to get stuck, it is not resistant to water flow impurities, it is easy to accumulate scale and easy to aging, or the air conditioner is not used for a long time in winter, the siphon valve The water in the drain pipe evaporates, which causes a malfunction of the drainage function, which makes it impossible to continue draining.

The purpose of the present invention is to provide an automatic drainer for an air conditioner, which can store the condensate of the air conditioner and automatically adjust the discharge amount to avoid the trouble that the drainage process is not smooth or blocked, and the siphon drainage cannot be continued.

The technical solution of the present invention is: an automatic drainer for an air conditioner, a condensed water inlet pipe and a drain pipe extending into the casing are set on the hollow casing, and a check valve is set in the drain pipe; a water pump is provided, and a drainage valve controlled by the pontoon mechanism is arranged between the water outlet of the water pump and the check valve; the water pump protrudes into the casing and the lower side wall is provided with radial pressure a water hole, the pressurized water inlet hole communicates with the pressure chamber of the bottom of the water pump through the through hole of the inner motor main shaft of the water pump, the motor main shaft is connected to the impeller in the pressurizing chamber, and a corner of the pressurizing chamber is provided with a confluence area Connecting the water pump drain port; the bottom cover of the water pump bottom closed pressurized chamber is corresponding to the motor spindle The siphon inlet hole is located in the housing, and a pressure-operated switch assembly is disposed above the float tube, and the switch in the switch assembly is serially connected to the water supply circuit of the water pump.

It can store the condensate of the air conditioner. The structure of the water pump has the dual application of the combination of the pressurized drainage when the impeller rotates and the siphon mode drainage when the impeller is not moving. The drain valve controlled by the pontoon mechanism controls the water drain in the siphon mode according to the water level in the housing. When the water level in the housing is too high, the float of the pontoon mechanism touches the switch assembly, and the switch in the switch assembly moves to the water pump. Power supply, pressurized drainage with water pump. Therefore, it can automatically adjust the discharge amount to avoid the problem that the drainage process is not smooth or blocked, and the siphon drainage cannot be continued.

In a preferred implementation structure, the switch assembly is composed of a jack, a return spring, a pressure plate and a micro switch; the micro switch is connected in series in the power supply circuit of the water pump; the jack is mounted on the right side of the cover of the housing, a lower portion thereof extends into the housing and is fitted with the return spring; an upper end of the plunger is located above the upper cover of the housing and is fitted with an outer end of the pressure plate; an inner end of the pressure plate is pivotally mounted on the upper cover of the housing Upper, the middle portion of the pressure plate pushes the contact of the micro switch; the return spring pushes the ejector pin downward, the pressure plate is inclined downward, the contact of the micro switch is fully extended, and the micro switch is in an open state. The structure of the switch assembly separates the switch from the moisture in the water pump and is electrically safe.

In particular, the drain valve controlled by the pontoon mechanism comprises a drain valve plug made of rubber, a drain valve body made of hard plastic, a slider, a fixing seat and a pontoon mechanism; the drain valve body is mounted on the left side of the upper cover of the housing Above, the valve cavity in the lower part of the drain valve body is provided on the drain valve water inlet and the drain valve plug through hole on the left side of the upper cover, and the upper part of the drain valve body is provided with an upwardly extending drain pipe to the drain valve plug through hole; The water inlet of the drain valve is in communication with the water outlet of the water pump, and the drain pipe is connected with the check valve; the left side of the top plate of the fixed seat has a stepped hole with a large end on the upper side, and the front and rear sides are respectively provided with a guide groove corresponding to the axis of the stepped hole, and a shaft hole at a right lower portion of the front and rear side panels; the pontoon at the right end of the pontoon mechanism is integrally connected with the U-shaped yoke through the connecting rod, and the inner walls of the two side plates of the yoke are respectively a short shaft is provided, and the left ends of the two side plates are respectively provided with bayonet; the fixing seat is mounted on the lower left side of the upper cover of the casing and is not below the drain valve body, and the U-shaped portion of the upper end of the drain valve plug is from below Wearing the cover of the housing The drain valve is inserted into the hole and protrudes into the valve cavity of the drain valve body; the left side of the upper cover of the upper cover of the housing is clamped with the stepped hole of the fixed seat to fix the drain valve plug U shape The flange of the portion of the U-shaped portion of the central portion of the U-shaped portion of the U-shaped portion of the U-shaped portion of the U-shaped portion is fixed to the center of the slider The guide blocks on both sides of the slider are respectively inserted into the guide grooves of the corresponding side panels of the fixed seat; the two short shafts on the fork head of the pontoon mechanism are pivotally connected to the shaft holes on the fixed seat, and the two bayonet ports on the fork The sliders are respectively connected to the bumps corresponding to the outward end faces of the guide blocks. When the pontoon of the pontoon mechanism floats up and down with the water level in the housing, so that the slider drives the drain valve plug to move up and down relative to the fixed seat, the side wall around the U-shaped portion of the drain valve plug is stretched upward or downward, and the drain valve plug The upper end of the U-shaped portion will close or leave the drain pipe of the drain valve body, that is, the float valve mechanism controls the closing and opening of the drain valve. The pontoon mechanism controls the drain valve plug by the principle of a lever, and the pressure applied during sealing is large, and the sealing property is good.

The automatic drainer for the air-conditioner of the present invention adopts the above-mentioned structure, and utilizes the dual application of the combination of the water pump pressurization and the siphon mode to achieve the substantial effects such as difficulty in failure, high efficiency and long-distance transmission. Its advantages are reflected in: (1) the function of automatically adjusting the drainage output. The elastic drain valve plug will be opened to different degrees with the large amount of condensed water discharged from the air conditioner. The larger the displacement, the larger the opening and closing of the drain valve plug, and the displacement will naturally increase, so that the automatic adjustment of the drainage output can be achieved. Features. (2) Architecture design for synchronous operation. The elastic drain valve plug is combined with the pontoon mechanism for sensing the water level. When the pontoon mechanism is displaced downward due to the rise of the condensed water level, the drain valve plug will be simultaneously opened to facilitate the discharge of the condensed water; When the condensed water level drops and the slider rises, the drain valve plug will rise synchronously. The pontoon mechanism controls the drain valve plug by the principle of lever. The applied pressure is large, and the drain valve plug will not be stuck. In addition, due to the upper drain The valve plug is set higher than the water surface, and it will not be aging due to the time when it is under the water surface, and it can also avoid the drainage blockage caused by impurities under the water surface.

(10) ‧‧‧ sink

(11) ‧ ‧ upper cover

(12)‧‧‧Condensate inlet pipe

(121)‧‧‧ side entrance

(122)‧‧‧ bottom entrance

(13) ‧‧‧ catheter

(14)‧‧‧Drain valve inlet

(15)‧‧‧Drain valve plug through hole

(20)‧‧‧Water pump

(201) ‧‧‧ bottom cover

(202)‧‧‧Weighing warehouse

(203)‧‧‧ Impeller

(204) ‧‧ ‧ Confluence Area

(21) ‧‧‧ Pressurized water inlet

(22)‧‧‧Siphon water inlet

(23) ‧‧‧Water pump drain

(24)‧‧‧Water pump drain

(30)‧‧‧Drainage valve body

(31)‧‧‧Valve

(32)‧‧‧Drainage pipe

(33) ‧‧‧Drainage tube outer end

(40)‧‧‧Drain valve plug

(41)‧‧‧U-shaped

(42)‧‧‧ center pole

(43) ‧ ‧ limit card points

(50)‧‧‧ Slider

(51)‧‧‧ casing

(52) ‧ ‧ guide blocks

(53) ‧‧‧Bumps

(60) ‧ ‧ fixed seat

(61) ‧‧‧ top board

(62)‧‧‧ Side panels

(63)‧‧‧Internal space

(64)‧‧‧ Guide slots

(65) ‧‧‧stepped holes

(66)‧‧‧Axis hole

(67)‧‧‧Bevel

(68)‧‧‧Positioning studs

(70) ‧ ‧ pontoon mechanism

(701)‧‧‧Float

(71)‧‧‧Links

(72)‧‧‧Fork

(73)‧‧‧ Short axis

(74)‧‧‧ bayonet

(80)‧‧‧Switch components

(81)‧‧‧Pole

(82)‧‧‧Return spring

(83) ‧‧‧Plate

(831)‧‧‧ pendulum axis

(84)‧‧‧Micro Switch

(841)‧‧‧Contacts

(90) ‧‧‧ check valve

(91) ‧‧‧Backstop drain plug

Figure 1 is a schematic cross-sectional view of the embodiment of the present invention in which the drainage state is stopped.

FIG. 2 is a schematic perspective view of the embodiment of the first embodiment after the bottom cover of the water pump is opened after the sump is removed.

Fig. 3 is a perspective view showing the three-dimensional structure of the drain valve plug, the slider, the fixed seat and the pontoon mechanism in the embodiment of Fig. 1.

Fig. 4 is a schematic view showing the mounting relationship of the switch assembly on the upper cover in the embodiment of Fig. 1.

Fig. 5 is a schematic cross-sectional view showing the structure of the first embodiment in a siphon drainage state.

Fig. 6 is a schematic cross-sectional view showing the structure of the first embodiment in a pressurized drainage state.

The cross-sectional structure of an embodiment of the automatic air-conditioner for air-conditioner is as shown in Fig. 1. The automatic drain is composed of a sump 10, an upper cover 11, a water pump 20, a drain valve body 30, a drain valve plug 40, and a slider. 50. The fixing base 60, the pontoon mechanism 70, the switch assembly 80 and the check valve 90 are composed.

The sump 10 and the upper cover 11 are made of hard plastic. The sump 10, which is open at the upper end, is fastened to the upper cover 11 to form a closed hollow casing. A condensed water inlet pipe 12 is disposed on the left rear side of the upper cover 11 above the casing, and the outer end of the condensate inlet pipe 12 is connected to the air-conditioner drain port through the external condensing water pipe, so that the condensed water discharged during the operation of the air-conditioner can be The side inlet 121 and the bottom inlet 122 from the bottom of the condensate inlet pipe 12 are concentrated and stored in the sump 10. The left front side of the upper cover 11 is provided with a drain valve water inlet 14 and a drain valve plug passage hole 15 that extend into the sump 10.

The water pump 20 is installed in the middle of the upper cover 11 and extends into the sump 10. The side wall of the lower portion of the water pump 20 is provided with a pressurized water inlet hole 21, which is a radial hole, which passes through The through hole of the inner motor main shaft of the water pump 20 communicates with the pressurized chamber 202 at the bottom of the water pump 20. Referring to Fig. 2, the motor spindle extends into the pressurized chamber 202 at the bottom of the water pump 20 and is connected to the impeller 203. A corner of the pressurized chamber 202 is provided with a confluence area 204 that communicates with the water pump drain port 23. The water pump 20 is closed on the bottom cover 201 of the pressurizing chamber 202, and the corresponding motor main shaft (ie, the rotating shaft of the impeller 203) is provided with a siphon water inlet hole 22, and the siphon water inlet hole 22 is connected to the pressurizing chamber 202. The water pump drain port 23 of the water pump 20 is connected to the drain valve water inlet 14 of the upper cover 11 via the water pump drain pipe 24.

Referring back to Fig. 1, the drain valve body 30 is fixed to the left front side of the upper side surface of the upper cover 11, and the valve chamber 31 at the lower portion of the drain valve body 30 faces the drain valve water inlet port 14 and the drain valve plug hole 15 on the upper cover 11, draining The drain valve plug hole 15 of the valve body 30 facing the upper cover 11 is provided with an upwardly extending drain pipe 32. The drain pipe outer end 33 is formed by an expanded diameter structure and a check valve 90 is mounted. When the drain valve plug 91 in which the check valve 90 floats is in a falling state, the nozzle of the outer end 33 of the drain pipe is automatically blocked.

Please refer to Fig. 3: a drain valve plug 40 made of rubber, the upper end of which is a top-hat-shaped U-shaped portion 41, and the center of the central surface of the convex portion of the central portion of the U-shaped portion 41 extends downwardly from a center rod 42 and a center rod The waist portion of 42 is provided with a plurality of outwardly protruding limit card points 43. The slider 50, the holder 60 and the pontoon mechanism 70 are made of a hard plastic. The center of the slider 50 is an upright sleeve 51, a sleeve A sheet-like guide block 52 is outwardly protruded from both sides of the 51, and an outer end surface of each of the guide blocks 52 is provided with an outwardly projecting bump 53. The fixing base 60 has an inverted concave shape, and a front side panel 62 is disposed on the front and rear sides of the top end 61, and a left side stepped hole 65 is formed on the left side of the top plate 61. The stepped hole 65 is provided. Four outwardly extending positioning posts 68 are evenly distributed on the outside. A guide groove 64 is formed in each of the two side panels 62 corresponding to the axis of the stepped hole 65, and a shaft hole 66 is defined in each of the right lower portion of the two side panels 62 and a left end surface extends from the side surface of the side panel 62. To the inclined surface 67 of the corresponding shaft hole 66. The stepped holes 65 and the guide grooves 64 and the shaft holes 66 are communicated to the internal space 63 of the fixing base 60. The right end of the pontoon mechanism 70 is a pontoon 701. The pontoon 701 is integrally connected with the U-shaped yoke 72 via a coupling rod 71. The inner walls of the two side plates of the yoke 72 are respectively provided with a short shaft 73, and the left ends of the two side plates are respectively provided. Bayonet 74.

Referring to Fig. 1, the U-shaped portion 41 of the drain valve plug 40 is inserted into the drain plug passage hole 15 of the upper cover 11 from below and extends into the valve chamber 31 of the drain valve body 30. The guiding blocks 52 on both sides of the slider 50 are respectively inserted into the guiding grooves 64 of the corresponding side panel 62 of the fixing seat 60; the flange of the U-shaped portion 41 of the drain valve plug 40 falls on the top plate 61 of the fixing seat 60. In the end, the center rod 42 of the drain valve plug 40 is inserted into the inner hole 511 of the sleeve 51, and the respective limit card points 43 on the center rod 42 of the drain valve plug 40 are caught at the lower end of the inner hole of the sleeve 51, so that the drain valve The plug 40 is fixed to the slider 50 as a whole. The four positioning protrusions 68 on the fixing base 60 are respectively fixed in corresponding positioning holes (not shown in FIG. 1) on the upper cover 11, so that the upper cover 11 and the fixing base 60 are integrally connected, and the upper cover 11 drains the valve plug through the hole. The edge of 15 is clamped together with the stepped hole 65 of the fixing seat 60 to fix the flange of the drain valve plug 40U-shaped portion 41; when the slider 50 drives the drain valve plug 40 to move up and down relative to the fixed seat 60, the U-shaped drain valve plug 40 The side walls around the portion 41 are stretched upward or downward. The short shaft 73 on the inner wall of the two side plates of the yoke mechanism 70 is slid into the corresponding shaft hole 66 via the corresponding inclined surface 67 of the fixing seat 60, and the bayonet 74 of the left end of the two side plates of the yoke 72 are respectively snapped and slipped. Block 50 corresponds to a bump 53 on the guide block 52.

The switch assembly 80 is composed of a jack 81, a return spring 82, a pressure plate 83, and a micro switch 84 as shown in FIG. The micro switch 84 is connected in series to the power supply circuit of the water pump 20. The jack 81 is mounted in the duct 13 on the right side of the upper cover 11, and the lower portion thereof projects into the sump 10 and is fitted with a return spring 82. One end of the return spring 82 abuts against the upper cover 11, and the other end abuts against the expansion of the lower end of the jack 81. The upper end of the jack 81 is located above the upper cover 11 and fits the outer end of the pressure plate 83. The inner end of the pressure plate 83 is provided with a swing shaft 831, and the swing shaft 831 is pivoted above the upper cover 11. In the middle of the pressure plate 83 The contact 841 of the micro switch 84 is pushed top. Normally, the return spring 82 pushes the jack 81 downward, the pressure plate 83 is tilted downward, the contact 841 of the micro switch 84 is fully extended, and the micro switch 84 is in an open state.

When using for the first time, please see Fig. 1 : The sump 10 has no water, and the pontoon 701 of the pontoon mechanism 70 falls. At this time, the bump 53 of the slider 50 in the bayonet 74 of the left end of the two side plates of the yoke 72 is oscillated upward with respect to the two short shafts 73 on the yoke 72, and the two guiding blocks 52 of the slider 50 are at the fixing seat 60. The upper guide groove 64 moves upward, and the sleeve 51 of the slider 50 drives the upper end of the drain valve plug 40U portion 41 upward, and the side wall of the drain valve plug 40U portion 41 is stretched, and the drain valve plug 40U portion 41 The upper end abuts and closes the lower port of the drain pipe 32 on the drain valve body 30.

When sufficient condensed water is accumulated in the sump 10, please refer to Fig. 5: the pontoon 701 of the pontoon mechanism 70 is lifted upward, and the bump 53 of the slider 50 in the bayonet 74 at the left end of the two side plates of the yoke 72 is followed. The two short shafts 73 on the opposite fork 72 swing downward, and the two guiding blocks 52 of the slider 50 move downward in the corresponding guide grooves 64 of the fixing base 60. The sleeve 51 of the slider 50 drives the drain valve plug 40U. The upper end of the shaped portion 41 is downward, the side wall of the drain valve plug 40U-shaped portion 41 is contracted, and the upper end of the drain valve plug 40U-shaped portion 41 is separated from the lower port of the drain pipe 32 on the drain valve body 30.

At this time, the upper surface of the pontoon 701 pushes the jack 81 upward, and the return spring 82 is compressed. The pressure plate 83 is lifted up, the contact 841 of the micro switch 84 is pushed inward, the micro switch 84 is in the passage state, and the water pump 20 is energized. The impeller 203 of the water pump 20 rotates with the motor main shaft, and the water flow from the pressurized water inlet hole 21 and the siphon water inlet hole 22 is thrown in the pressurized chamber 202 by the impeller 203 to the confluence area 204, and from the water pump drain port 23 And the water drain pipe 24 enters the valve chamber 31 and the drain pipe 32 at the lower part of the drain valve body 30, and the drain valve plug 91 whose check valve 90 floats at the outer end 33 of the drain pipe is lifted by the water to the pipe leaving the outer end 33 of the drain pipe. At the mouth, the water in the collecting tank 10 is discharged outward.

When the water level of the sump 10 drops to the extent shown in Fig. 6, the pontoon 701 of the pontoon mechanism 70 is dropped, the upper surface of the pontoon 701 is separated from the ejector pin 81 of the switch assembly 80, and the restoring force of the return spring 82 causes the ejector 81 to answer Next. The outer end of the pressure plate 83 is dropped, the contact 841 of the micro switch 84 is fully extended again, the micro switch 84 is in an open state, and the water pump 20 is powered off and does not operate. The impeller 203 of the water pump 20 stops rotating, and the water in the sump 10 passes through the siphon water inlet hole 22, the pressurized chamber 202, and the confluence area 204 of the bottom surface of the water pump 20 to enter the water pump drain port 23 to siphon The mode is discharged outward through the valve chamber 31 and the drain pipe 32 at the lower portion of the drain valve body 30 and the check valve 90 (the floating drain valve plug 91 is still lifted by the water flow from the nozzle of the outer end 33 of the drain pipe).

During the siphon drainage period, if the flow path is blocked, the water level in the sump 10 will rise again to the condition shown in Fig. 5, and the water pump 20 will enter the working state again, forcibly discharging the water in the sump 10. At the same time, the obstruction in the flow channel is washed away, so that the flow path is unblocked.

When the siphon drainage operation causes the water level of the sump 10 to drop to the extent that the pontoon 701 of the pontoon mechanism 70 falls to the extent shown in Fig. 1, the upper end of the drain valve plug 40U portion 41 will withstand and close the drain pipe on the drain valve body 30. 32 ports, forced to end the siphon drainage operation. Please note that at this time, the siphon inlet hole 22, the pressurized chamber 202, the confluence area 204, the water pump drain port 23, the water pump drain pipe 24, and the valve chamber 31 at the lower portion of the drain valve body 30 of the water pump 20 are still Filled with water, the drain 32 and the check valve 90 of the drain valve body 30 are still filled with water, and the floating drain plug 91 is lifted by the water from the nozzle of the outer end 33 of the drain. Once the water in the sump 10 is raised enough to cause the upper end of the drain valve plug 40U portion 41 to exit the lower port of the drain pipe 32 on the drain valve body 30, the siphon drain operation will continue.

The advantages of this creation are that many variations and modifications can be derived from the disclosure or teachings herein. If the equivalent changes made in accordance with the concept of the present invention, the effect is not beyond the spirit of the specification and the schema. At the time, it should be regarded as within the technical scope of this creation.

(10) ‧‧‧ sink

(11) ‧ ‧ upper cover

(12)‧‧‧Condensate inlet pipe

(13) ‧‧‧ catheter

(14)‧‧‧Drain valve inlet

(15)‧‧‧Drain valve plug through hole

(20)‧‧‧Water pump

(21) ‧‧‧ Pressurized water inlet

(23) ‧‧‧Water pump drain

(24)‧‧‧Water pump drain

(30)‧‧‧Drainage valve body

(31)‧‧‧Valve

(32)‧‧‧Drainage pipe

(33) ‧‧‧Drainage tube outer end

(40)‧‧‧Drain valve plug

(41)‧‧‧U-shaped

(50)‧‧‧ Slider

(60) ‧ ‧ fixed seat

(61) ‧‧‧ top board

(70) ‧ ‧ pontoon mechanism

(701)‧‧‧Float

(71)‧‧‧Links

(80)‧‧‧Switch components

(81)‧‧‧Pole

(82)‧‧‧Return spring

(83) ‧‧‧Plate

(90) ‧‧‧ check valve

(91) ‧‧‧Backstop drain plug

Claims (3)

An automatic drainer for an air conditioner, wherein a hollow casing is provided with a condensate inlet pipe and a drain pipe extending into the casing, and a check valve is set in the drain pipe; wherein the drain pipe is provided with a water pump, a drain valve controlled by a buoy mechanism between the drain port of the water pump and the check valve; the water pump protrudes into the casing and the lower side wall is provided with a radial pressurized water inlet hole The pressurized water inlet hole communicates with the pressure chamber of the bottom of the water pump through the through hole of the inner motor main shaft of the water pump, and the motor main shaft is connected to the impeller in the pressurizing chamber, and a corner of the pressurizing chamber is connected with the confluence area a drain port of the water pump; a bottom cover of the bottom of the pressurization chamber of the water pump is provided with a siphon inlet hole corresponding to the motor main shaft; a buoy of the float mechanism is located in the casing and a switch assembly with a touch action is arranged above the float The switch in the switch assembly is connected in series to the power supply circuit of the water pump. The automatic drainer for an air conditioner according to claim 1, wherein the switch assembly is composed of a jack, a return spring, a pressure plate and a micro switch; the micro switch is connected in series in a power supply circuit of the water pump; the jack is installed a lower portion of the upper cover of the housing, the lower portion of which protrudes into the housing and is fitted with the return spring; the upper end of the plunger is located above the upper cover of the housing and the outer end of the pressure plate is fitted; the inner end of the pressure plate The pivoting member is disposed above the upper cover of the housing, and the middle portion of the pressing plate pushes the contact of the micro switch; the return spring pushes the plunger to the lower position, the pressing plate is inclined downward, and the contact of the micro switch is completely extended. The micro switch is in an open state. The automatic air conditioner for an air conditioner according to claim 1, wherein the drain valve controlled by the pontoon mechanism comprises a drain valve plug made of rubber, a drain valve body made of hard plastic, a slider, a fixing seat and a pontoon mechanism. The drain valve body is mounted on the upper left side of the upper cover of the casing, and the valve cavity in the lower part of the drain valve body is accommodated in the drain valve water inlet and the drain valve plug through hole on the left side of the upper cover, and the drain valve body is directly facing the drain valve The plug hole is provided with an upwardly extending drain pipe; the drain valve water inlet communicates with the water pump drain port, and the drain pipe communicates with the check valve; the left side of the fixed seat top plate has a large end on the upper end Stepped holes, the front and rear sides are respectively provided with guide grooves corresponding to the axis of the stepped holes, and the right and lower portions of the front and rear side panels are provided with shaft holes; the float of the right end of the pontoon mechanism is connected with the U-shaped fork by the connecting rod The inner wall of the two side plates of the fork head is respectively provided with a short shaft, and the left ends of the two side plates are respectively provided with bayonet; the fixing seat is installed under the left side of the upper cover of the housing and is not below the drain valve body, Drain valve plug upper end hat The U-shaped portion is sleeved from the lower side of the upper cover of the housing to the drain valve plug through hole and extends into the valve cavity of the drain valve body; the left side of the upper cover of the housing is filled with the edge of the hole and the fixing seat The stepped holes are commonly clamped and fixed to the U-shaped portion of the drain valve plug The flange of the central portion of the central surface of the central portion of the U-shaped portion of the drain valve plug is fixed integrally with the sleeve in the middle of the slider; the guide blocks on both sides of the slider are respectively inserted into the fixed seat Corresponding to the guide groove of the side panel; the two short shafts on the fork head of the pontoon mechanism are pivotally connected to the shaft hole on the fixing seat, and the two bayonet ports on the fork head are respectively engaged with the outer end surface of the corresponding guide block of the slider Bump.