CN100510239C

CN100510239C - Upper water-discharging washing machine

Info

Publication number: CN100510239C
Application number: CNB2004100520464A
Authority: CN
Inventors: 谭牛根; 周耀伟; 彭朝晖
Original assignee: Jinling Electrical Co Ltd
Current assignee: Jinling Electrical Co Ltd
Priority date: 2004-11-04
Filing date: 2004-11-04
Publication date: 2009-07-08
Anticipated expiration: 2024-11-04
Also published as: CN1769579A

Abstract

This invention relates to a up drain washer, which includes the washing barrel, the drain valve, the drain pump and the switch that is used for checking and controlling the water level in the washing barrel; the water spill outlet on the washing barrel connects with the water inlet of the drain pump by the water spill tube; the drain outlet under the washing barrel connects with the upper part of the drain valve, the down part of the drain valve connects with water inlet of the drain pump; the water level in the washing barrel is high than the turn-on drain pump at the guarding water level, lower thatn the turn-off drain pump at the replacement water level; the charater is that the related spill tube and the inner washing barrel are connected with a inverse 'U'siphon whose inner peak is lower than the guard water level, and the inlet in the washing barrel of the siphon is lower than the spill outlet. This invention is to protect the drain pump from excessive heating damage for empty driving, so it prolongs the life of the drain pump.

Description

A kind of draining washing machine of going up

Technical field

The present invention relates to a kind of washing machine, especially a kind of last draining washing machine that uses draining pump.

Background technology

The last draining washing machine of prior art comprises as shown in Figure 1: be fixed on the washtub 2 in the casing of washing machine 1; Be provided with the water level switch 5 that in conduit and washtub 2, is communicated with being higher than washing machine warning line D; The gap C on washtub 2 tops is through the water inlet of overflow pipe 8 communicated drainage pumps 7; The water discharge outlet of washtub 2 bottoms connects the upstream of draining valve 6, the water inlet of the downstream communicated drainage pump 7 of draining valve 6.The liquid level of described water level switch 5 in washtub 2 is higher than the action of warning line D place and connects draining pump 7, and the washings of spill-over are discharged outside the washing machine, influences the household safe and sanitary in case emit water; Liquid level in washtub 2 is lower than the water level B place that resets and turn-offs draining pump 7.The common air film type pressure switch that the general use of the Level Detection of tub of washing machine and control is simple in structure, cheap and sensitivity is lower, its action water level often has bigger return difference with the water level that resets.But existing washing machine is in order to make full use of the volume of washtub, and the upper edge of washtub 2 has limited the distance of warning line D and gap C along shorter usually with the distance of gap C, is difficult to satisfy the requirement of the water level switch 5 action water levels and the water level return difference that resets.When water level switch 5 sensitivity during the unstable so that characteristics fluctuation of lower or quality, often fail to make water level switch 5 before liquid level drops to gap C, just to reset turn-offing draining pump 7, draining pump 7 thereby remain in operation.But dropping to gap C, liquid level just do not have washings to continue to be spilled over to draining pump 7 again.So just cause draining pump 7 long-time no-load runnings, the as easy as rolling off a log cause thermal damage that caused influences the life-span of draining pump 7, even has an accident.

Summary of the invention

Technical problem to be solved by this invention is: propose a kind of draining washing machine of going up, it only sets up simple inexpensive structure with respect to existing washing machine, improves the no-load running situation of prior art draining pump.

The technical scheme that the present invention solve the technical problem is: a kind of draining washing machine of going up comprises washtub, draining valve, draining pump and is used for the water level switch of Detection ﹠ Controling washtub liquid level; The gap on washtub top is through the water inlet of overflow pipe communicated drainage pump; The water discharge outlet of washtub bottom connects the upstream of draining valve, the water inlet of the downstream communicated drainage pump of draining valve; The liquid level of water level switch in washtub is higher than the warning line place and connects draining pump, is lower than the water level place that resets and turn-offs draining pump; It is characterized in that: cross-over connection one inner top surface is lower than " U " shape bend pipe of warning line in described overflow pipe and the washtub, and the inlet of described bend pipe in washtub is lower than gap.

As can be seen, this technical scheme has increased by a siphon passage dexterously, when liquid level falls after rise to gap by warning line, because the bend pipe inlet is lower than gap, washings in the washtub can be continued to flow into overflow pipe by siphon, be lower than the bend pipe inlet until the liquid level of washtub.So just can avoid the washtub liquid level to be lower than the situation of gap draining pump with regard to no-load running, and can satisfy the requirement of the water level switch action water level and the water level return difference that resets with comparalive ease, level fluctuation causes frequent starting when avoiding water level switch because of washing.

The present invention further design is: the inlet of described bend pipe in washtub is lower than the water level that resets of water level switch, thereby guaranteed that water level switch is before the shutoff draining pump that resets, there are washings to supply with draining pump, avoid draining pump no-load running fully so that cross the situation of cause thermal damage.

One of further design of above scheme is: the outlet of described bend pipe is tightly connected in gap and overflow pipe.This structure is compact, but technological requirement is higher.

Two of the further design of above scheme is: the outlet of described bend pipe is crossed gap and is inserted in the overflow pipe.This structure can be simplified technological requirement, and preferably the inlet of bend pipe in washtub is higher than outlet, can simplify the seal request to outlet, makes siphon more reliable.

Description of drawings

Following accompanying drawing is used for that the present invention is further illustrated in conjunction with the embodiments:

Fig. 1 is a prior art washing machine structure schematic diagram;

Fig. 2 is the washing machine structure schematic diagram of the embodiment of the invention;

The specific embodiment

A kind of washing machine of prior art as shown in Figure 1.Washtub 2 is fixed in the casing of washing machine 1, the gap C on washtub 2 tops is through the water inlet of overflow pipe 8 communicated drainage pumps 7, the water discharge outlet of washtub 2 bottoms connects the upstream of draining valve 6, the water inlet of the downstream communicated drainage pump 7 of draining valve 6, the water discharge outlet of draining pump 7 connects the drainpipe 10 that upwards hangs on casing of washing machine 1 outside.After draining pump 7 started, the liquid that flows into to its import discharged through drainpipe 10.Air film type water level switch 5 with a moving together contact is set on washtub 2 tops, and it detects air flue and is communicated with washtub 2 inner bottom parts through conduit; The liquid level that water level switch 5 is adjusted in washtub 2 is higher than the action of warning line D place, resets in the water level place that resets that is lower than the certain return difference value of this water level.Usually, D is than high several centimetres of gap C for the design warning line, and the action return difference of water level switch 5 designs within this difference in height usually.Described moving together contact is series in the power circuit of draining pump 7 power supplies.Thereby the liquid level of water level switch 5 in washtub 2 is higher than warning line D place, connects the power supply of draining pump 7, and the washings of spill-over are discharged outside the washing machine, influences the household safe and sanitary in case emit water; Liquid level in washtub 2 is lower than the water level B place that resets, and disconnects the power supply of draining pump 7, and it is shut down.In addition, this washing machine also have comprise the electric-motor drive device 3 that is positioned at washtub 2 outer bottoms and transmission thereof be positioned at washtub 2 inner bottom parts stirring wheel 4, and the gauge tap 9 of connecting the power circuit of electric-motor drive device 3 and draining pump 7, wash normally with draining and turn round.This is typical case's composition of draining washing machine on a kind of plain edition, can certainly be similar agitator type washing machine.

Embodiment of the invention washing machine is that local improvement forms on the basis of prior art washing machine shown in Figure 1, as shown in Figure 2.The main improvement of its prior art washing machine shown in Figure 1 relatively is:

Cross-over connection one inner top surfaces are lower than " U " shape bend pipe 12 of warning line D in described overflow pipe 8 and the washtub 2, the outlet of bend pipe 12 sticks with glue the agent seal bond in gap C, and be connected with overflow pipe 8, bend pipe 12 forms a syphon structure with overflow pipe 8, specifically sees the E enlarged drawing among Fig. 2.The inlet A of described bend pipe 12 in washtub 2 is lower than gap C (3-4) cm, and than water level B low at least (3-4) cm that resets of water level switch.Generally, the water level B difference that resets of the water level switch of different model washing machine can be drawn by experiment.When the liquid level of washtub 2 is higher than warning line D, trigger water level switch 5 and connect draining pump 7, even drop to gap C in liquid level, because the existence of syphon structure, make washings continue to flow into overflow pipes 8 and enter draining pump 7 again, be lower than the inlet A of bend pipe 12 in washtub 2 until the liquid level of washtub 2 through bend pipe 12.This just can realize that water level switch 5 did not reset before the liquid level of washtub 2 also drops to the inlet A of bend pipe 12 in washtub 2; turn-off draining pump 7; even because water level switch 5 sensitivity are lower or quality is unstable so that characteristics fluctuation; its action return difference takes place greater than warning line D during than the situation of the difference in height of gap C; also can avoid draining pump 7 no-load running to occur so that cross cause thermal damage; make draining pump obtain protection, thereby prolonged the life-span of draining pump.

The outlet of bend pipe 12 and the form that can also use instead being connected of overflow pipe 8 shown in the enlarged drawing E ' among Fig. 2: the roughly isometric bend pipe 12 in former gateway changes the bend pipe 12 ' of long (3-4) cm of outlet into, this outlet is crossed gap C and is inserted in the overflow pipe 8, can need not to seal with gap C.So also be the principle of having utilized siphon, help to reduce technological requirement, improve its reliability.

Certainly, " U " shape bend pipe that falls mentioned in the foregoing description is siphonal a kind of common structure, also can be the syphon structure of other shapes.

The present invention not only is applicable to the improvement of draining washing machine on the plain edition of draining, also goes for containing the improvement of the washing machine with full-automatic water supply and drainage of similar water line structure.The water level switch of such washing machine can be the level sensor (for example frequency discrimination formula water level switch) of the continuous circuit parameter of output, it is according to prior art, connect an I/O mouth of computer controller single-chip microcomputer, according to the program of setting, can realize similar control equally to water pump 7, thereby also belong to the category that the present invention covers.

Claims

1, a kind of draining washing machine of going up comprises washtub (2), draining valve (6), draining pump (7) and is used for the water level switch (5) of the interior liquid level of Detection ﹠ Controling washtub (2); The gap (C) on washtub (2) top is through the water inlet of overflow pipe (8) communicated drainage pump (7); The water discharge outlet of washtub (2) bottom connects the upstream of draining valve (6), the water inlet of the downstream communicated drainage pump (7) of draining valve (6); The liquid level of water level switch (5) in washtub (2) is higher than warning line (D) and locates to connect draining pump (7), is lower than the water level that resets (B) and locates to turn-off draining pump (7); It is characterized in that:

Described overflow pipe (8) and interior cross-over connection one inner top surface of washtub (2) are lower than " U " shape bend pipe (12,12 ') of warning line (D), and the inlet (A) of described bend pipe (12,12 ') in washtub (2) is lower than gap (C), and bend pipe and overflow pipe form a syphon structure;

The inlet of described bend pipe (12,12 ') in washtub (2) is lower than the water level that resets (B) of water level switch.

2, according to the described washing machine of claim 1, it is characterized in that: the outlet of described bend pipe (12) is tightly connected in gap (C) and overflow pipe (8).

3, according to the described washing machine of claim 1, it is characterized in that: the outlet of described bend pipe (12 ') is crossed gap (C) and is inserted in the overflow pipe (8); The inlet of described bend pipe (12 ') in washtub (2) is higher than outlet.