CN1210705A

CN1210705A - Cleaning and drying machine for tableware

Info

Publication number: CN1210705A
Application number: CN98116099A
Authority: CN
Inventors: 由良政树; 乾浩章; 稻田刚士; 官内隆
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 1997-07-18
Filing date: 1998-07-17
Publication date: 1999-03-17
Anticipated expiration: 2018-07-17
Also published as: CN1212801C; KR19990013939A; TW385242B; KR100467256B1

Abstract

The invention provides a kind of dinner set washing dryer comprises: impellers, casing and electric motor driving the impellers in which the impellers mounted with the first centrifugal blade and the circular board supporting the first centrifugal blade; the casing is mounted with the impellers and comprising the inlet and outlet; the blade shape of first centrifugal blade has the back-curved blade at the inner perimeter and the fore-curved blade at the outer perimeter; opposite to the rotating direction, the exit angle of back-curved blade is set to below 90 degree and the exit angle of fore-curved blade is set to above 90 degree. With such concise structure, it can pressurize the water with bubbles and the liquid and gas as well so that it not only can increase the washing capability during blocking bit also will save the water and power consumption and reduce the washing time.

Description

Cleaning and drying machine for tableware

The present invention relates to have the cleaning and drying machine for tableware of the scavenging pump of pressurization rinse water, particularly scavenging pump.

Below, with reference to Figure 11 existing cleaning and drying machine for tableware is described.

When carrying out wash dishes, tableware is placed in the tableware basket 62 of rinse bath 61 entry into service behind the input cleaning agent.After the running beginning, stable for the action that makes scavenging pump 63 pressurization rinse water, carry out the water supply operation that the scheduled volume rinse water is supplied to rinse bath 61 earlier.The suction inlet of scavenging pump 63 and the water surface have certain interval.Then lead and wash operation, be cleaned pump 63 pressurization and sprayed from washer jet 65 with cleaning agent by heater 64 warmed-up rinse water.Rinse water from the spray-hole of washer jet 65 towards vertical direction or oblique upper to injection.Washer jet 65 is spraying rotation approximately flatly under the counter-force effect.Under the effect of the impulsive contact force of the rinse water that the washer jet 65 from such rotation ejects, cleaning agent, heat etc., tableware is cleaned totally.

After the master who has passed through the scheduled time washes operation, enter drainage procedure, the addle of cleaning tableware etc. with outside the draining pump 66 discharge machines.Then, carry out supplying with for 4 times water supply operation, rinsing process and the above-mentioned drainage procedure of new rinse water continuously repeatedly after, finish matting.Above-mentioned rinsing process is from rinse water nozzle 65 jet cleaning water, with the tableware of rinsing with cleaning agent and foul (attached to the swill on the tableware etc.).

Then, in the export-oriented rinse bath 61 of air supply duct 68 process air outlets, 69 slaves, send into air, heater 64 is turned round intermittently make hot blast, make attached to the water-drop evaporation on the tableware, carry out drying process with this hot blast with air blast 67.At this drying process, the humid air in the rinse bath 61 is outside exhaust outlet 70 discharge machines.The 71st, the control device of runnings such as control scavenging pump 63, heater 64.The 72nd, send into the air entry of room air to air blast 67.The 73rd, the water-supply valve on switching rinse water water supply road.74,75,76 is respectively the centrifuge blade of scavenging pump 63, draining pump 66 and air blast 67.77, the 78, the 79th, drive their motor.The 80th, the draining road, the 81st, reclaim the filter of leftovers.

There is following problem in above-mentioned existing scavenging pump.

Usually, scavenging pump has following acting characteristic: can not pump up water when 1. air imbibed quantity increases.Even 2. near cutout, have air seldom to pump up water.If the volume air is arranged in the scavenging pump when 3. starting, pump can not normal starting.These acting characteristics are because the inlet portion of blade is stopped that by air current disruption or water flow velocity reduce, and make the pressure differential of blade exit and inlet big, and air does not seldom flow out blade to be put aside to get up to produce outward.

Therefore, in the cleaning and drying machine for tableware that uses this scavenging pump, the rinse water of can stably pressurizeing simultaneously in order to obtain cleansing power, can not be sneaked into a certain amount of above bubble in the rinse water.For example, if sneak into general cleaning agent for kitchen use, then produce a large amount of bubbles, scavenging pump 63 can not get required pressure.For this reason, must use low-foam detergent, to suppress the rinse water foaming of circulation.That is, must use so-called " scavenger specially ".

When filter stopped up, the cleaning water yield of supplying with scavenging pump reduced, and becomes the suction air state, even existing pump sucks air seldom, also can cause pump capacity to reduce, and reduces cleaning performance.In addition at this moment, scavenging pump produces pulsation, and scavenging pump discharge pressure near the cataclysm periodically positive normal pressure, produces big noise from zero thus.

In addition, common, the flow Q of expression scavenging pump 63 is single with the QH characteristic of discharging the relation of pressing H, in matting, from discharge pressure and the flow jet cleaning water of washer jet 65 to be scheduled to.Therefore, irrelevant with the tableware quantity that will clean and dirty degree, the circular flow of scavenging pump 63 is certain, needs the suction portion depth of water (datum level records in the rinse bath " cleaning water level ") of the predetermined cleaning water yield and scavenging pump 63.In order to ensure this cleaning water yield and cleaning water level, the cleaning water yield and the cleaning water level of supplying with must be controlled in the certain limit, need the water level detecting mechanism of high accuracy, high price for this reason.

In addition, in matting,, the cleaning water yield of regulation must be heated to set point of temperature with tableware for the cleaning performance that obtains stipulating.For this reason, the heating efficiency of heater 64 (being also referred to as capacity) must be big.And, heat time heating time that also must the lengthening heater, like this, increased and in cleaning running, made water consumption, electric power consumption and the duration of runs.

The present invention makes for the problem that the scavenging pump that solves in the existing cleaning machine exists.

The scavenging pump of cleaning and drying machine for tableware of the present invention has the mixed phase impeller, and this mixed phase impeller has backward leaning vane that is positioned at perimembranous and the forward curved vane that is positioned at peripheral part.The mixed phase impeller can easily pressurize, circulate and contain the water of gas, liquid and air.Therefore, when the foaming of above-mentioned cleaning agent or during plugged filter, can improve cleaning performance.The aeriferous water that can pressurize in addition can reduce and clean water level, thereby can economize on water and save the electric power that adds hot water.

The cleaning and drying machine for tableware of claim 1 record of the present invention, it is characterized in that, have the scavenging pump of accommodating the rinse bath that is cleaned thing, the wiper mechanism of being with the jet of jet cleaning water, pressurization rinse water, this scavenging pump has the motor of impeller, housing and the above-mentioned impeller of driving, above-mentioned impeller is setting the plectane of the 1st centrifuge blade and supporting the 1st centrifuge blade, is adorning impeller in the above-mentioned housing and is having suction inlet and outlet; The shape of the blade of the 1st centrifuge blade is, have backward leaning vane that is positioned at perimembranous and the forward curved vane that is positioned at peripheral part, with respect to predetermined direction of rotation, the exit angle of backward leaning vane is set at below about 90 degree, the exit angle of forward curved vane is set at more than about 90 degree, and the interior perimembranous of blade is connected with curve shape with peripheral part.

According to this structure, the pressurization of liquid is mainly undertaken by the action of the interior perimembranous backward leaning vane of the 1st centrifuge blade, and for the load torque that the rotation that reduces by centrifuge blade produces, pressurization effectively adopts exit angle to be set at the following turbo blade shape of about 90 degree.The pressurization of gas is mainly undertaken by the action of the peripheral part forward curved vane of the 1st centrifuge blade, and in order to obtain big air quantity and wind speed, the exit angle of this peripheral part forward curved vane is set at more than about 90 degree, has the Sirocco fan shape.Therefore, by from the wiper mechanism air-supply, can improve drying efficiency.

In addition,,, also can promptly discharge the water and air that is trapped in the housing even water, air, the water that is mixed with bubble enter state in the pump at a large amount of air because the absolute velocity of the fluid that flows out is big, the maintenance state that can pump up water, suppressing to heavens, performance reduces.That is, when stopping up or output when not enough, comparable pump before keeps high pump to discharge pressing.

Therefore, regardless of the state of the fluid of supplying with scavenging pump, the discharge of can pressurizeing can improve output deficiency or residue and too much produce cleaning performance, noise-decreasing when stopping up.Perhaps, make water consumption, shorten the duration of runs, reduce power consumption because of low output cleans to reduce.In addition, when sending air, the interior perimembranous backward leaning vane of the 1st centrifuge blade makes the smooth and easy inflow of air, plays the inducing function as guide blade, so, compare with general Sirocco fan with diameter, can realize high pressure, high air quantity, low-power.Therefore, can improve the starting characteristic of scavenging pump significantly.

In addition, impeller of the present invention has exit angle and is set at the above forward curved vane of about 90 degree, compares with the turbine type impeller of general backward leaning vane, and the power of pump has the tendency of raising, compares with the impeller with diameter, with the speed rotation lower than turbine type impeller.Therefore, can lower NZ sound, lower the noise when running well in impeller and protuberance generation.

The invention of claim 2 record is on the cleaning and drying machine for tableware basis of claim 1 record, with the blade height of peripheral part forward curved vane be set at the blade height of interior perimembranous backward leaning vane on an equal basis below.Because impeller of the present invention adopts this peripheral part forward curved vane, though its air discharging performance is very good, for the backward leaning vane with diameter, pump power has the tendency that increases, and therefore, the scavenging pump CD-ROM drive motor will adopt high power (high torque (HT)) type motor.

But, can not too reduce the input power that air discharging performance ground lowers scavenging pump according to this structure.That is, can adopt more compact motor, enlarge the miniaturization of cleaning volume or product because of the miniaturization of cleaning machine Machinery Ministry.

The invention of claim 3 record, be on the cleaning and drying machine for tableware basis of claim 1 or 2 records, the peripheral part forward curved vane is being divided into 2 parts with the slightly parallel direction of plectane, the blade of a part is below about 90 degree by exit angle, and by constituting with slick and sly the 2nd backward leaning vane that is connected of interior perimembranous backward leaning vane.

According to this invention, in the invention except claim 2 record, outside the input power characteristic of having improved,,, improve cleaning performance so can improve pump performance (flow, discharge pressure) because interior perimembranous backward leaning vane is extended to impeller outer diameter.

The invention of claim 4 record is on the cleaning and drying machine for tableware basis of claim 3 record, in the scope that does not exceed the impeller periphery, with the vane end faces of above-mentioned peripheral part forward curved vane end face and backward leaning vane, with slightly plane connection.

According to this structure, can separate with the flowing of fluid between the 2nd backward leaning vane at the peripheral part forward curved vane of the 1st centrifuge blade, make the impeller outer perimembranous fluid flow not disorderly.Therefore, can reduce the stream loss, improve pump performance.Improve cleaning performance, prevent because of the disorderly noise that produces of fluid.

The invention of claim 5 record is on the cleaning and drying machine for tableware basis of each record in claim 1 to 4, the peripheral part blade shape of centrifuge blade is set at its exit angle is about less than 90 degree.

According to the present invention,, can lower the power of pump because the load of impeller reduces.Therefore, small-sized pump drive motor be can use, cost degradation, the miniaturization of cleaning and drying machine for tableware realized.

The invention of claim 6 record, be on the cleaning and drying machine for tableware basis of each record in claim 1 to 5, be equipped on interlobate a slice or some the 3rd centrifuge blades of the 1st centrifuge blade, have backward leaning vane that is positioned at perimembranous and the forward curved vane that is positioned at peripheral part, with respect to predetermined direction of rotation, the inlet angle of backward leaning vane is set at below about 90 degree, exit angle is set at below about 90 degree, the exit angle of forward curved vane is set at more than about 90 degree, and the internal diameter blade of the 3rd blade is greater than the internal diameter blade of the 1st centrifuge blade.

Adopt this structure, can its stream loss be passed through less the fluid rectification of between the 1st centrifuge blade and peripheral part forward curved vane, flowing.As a result, can lower the power of pump, improve pump performance.In addition, about the blade pitgh of blade inlet portion from reducing because the internal diameter of the 3rd centrifuge blade is set at maximum diameter greater than the foreign matter that has passed through filter, so, in impeller, can not produce the foreign matter obstruction.

According to this invention, can improve the discharging performance of air, or improve pump performance and lower pump power.Can economize on water more, the shortening time, improve just often the cleaning performance when stopping up, because the miniaturization of pump drive motor can realize cost degradation, the miniaturization of cleaning and drying machine for tableware.

The invention of claim 7 record is the cleaning and drying machine for tableware basis with each record in the claim 1 to 6, with volume settings between the blade of peripheral part forward curved vane be and the blade of interior perimembranous backward leaning vane between volume on an equal basis more than.

Impeller of the present invention is made of interior perimembranous backward leaning vane and peripheral part forward curved vane, and backward leaning vane mainly carries out the discharge of rinse water, and forward curved vane is discharged impeller outer to the water of band bubble when air is sneaked into.Between the blade of peripheral part forward curved vane volume settings be and the blade of interior perimembranous backward leaning vane between volume equal more than, like this, improve the discharging performance of band bubble water.

Therefore, have more water-saving result and shorten the duration of runs, the noise when lowering plugged filter improves cleaning performance.

The invention of claim 8 record, be cleaning and drying machine for tableware based on each record in the claim 1 to 7, with volume settings between the blade of peripheral part forward curved vane be and the blade of impeller suction portion's volume and interior perimembranous backward leaning vane between the volume sum equal more than.

Impeller of the present invention is made of interior perimembranous backward leaning vane and peripheral part forward curved vane, and backward leaning vane mainly carries out the discharge of rinse water, and forward curved vane is discharged impeller outer to the water of band bubble when air is sneaked into.Between the blade of peripheral part forward curved vane volume settings be and the blade of impeller suction portion's volume and interior perimembranous backward leaning vane between the volume sum equal more than, like this, can improve the discharging performance of band bubble water greatly.

Therefore, when adopting the high-pressure wash pump, also have more water-saving result and shorten the duration of runs, the noise when lowering plugged filter improves cleaning performance.

The cleaning and drying machine for tableware of claim 9 record, it is characterized in that, have the centrifugal pump of the scavenging pump of accommodating the rinse bath that is cleaned thing, the wiper mechanism of being with the jet of jet cleaning water, conduct pressurization rinse water, this centrifugal pump has the motor of impeller, housing and the above-mentioned impeller of driving, above-mentioned impeller is setting the 1st centrifuge blade, is adorning impeller in the above-mentioned housing and is having suction inlet and outlet; The blade shape of the 1st centrifuge blade is, have backward leaning vane shape portion that is positioned at the inside portion and the forward curved vane shape portion that is positioned at the outside portion, with respect to predetermined direction of rotation, the exit angle of backward leaning vane shape portion is set at below about 90 degree, and the exit angle of forward curved vane shape portion is set at more than about 90 degree; Between the 1st centrifuge blade, setting a slice or some the 2nd centrifuge blades respectively, the 2nd centrifuge blade has the forward curved vane shape of omiting curve or straight line, with respect to direction of rotation, the inlet angle of the 2nd centrifuge blade is set at more than about 90 degree, exit angle is set at more than about 90 degree, and the 2nd centrifuge blade is shorter than the length of blade of the 1st centrifuge blade.

According to this invention, the pressurization of liquid is mainly undertaken by the backward leaning vane shape portion of the 1st centrifugal pump, and in order to reduce the load torque that the centrifuge blade rotation produces, pressurization effectively adopts exit angle to be set at the following so-called turbo blade shape of about 90 degree.The pressurization of gas is mainly undertaken by the forward curved vane shape portion of the 1st centrifugal pump and the rotation of the 2nd centrifuge blade, in order to obtain big air quantity and wind speed, the inlet angle of the forward curved vane shape portion of the 1st centrifuge blade and exit angle are set at more than about 90 degree, have so-called Sirocco fan shape.

In addition, because the absolute velocity of the fluid that flows out is big, the water of water, air, band bubble also can be discharged the water and air that is trapped in the housing rapidly there being a large amount of air to enter state in the pump, and the maintenance state that can pump up water suppresses performance extremely and reduces.

In addition, when sending air, except the 2nd centrifuge blade, the 1st centrifuge blade rotates similarly, and the 1st centrifuge blade makes the smooth and easy inflow of air, plays the effect of the impeller inducer of inlet guide blade.So air quantity is than big with the general Sirocco fan of diameter.

When discharge water, the fluid that comes out from the 1st centrifuge blade can flow out effectively because of the rectification effect of the 2nd centrifuge blade, compares with general turbine pump to have the equal above efficiency of pump.

Therefore, the invention of claim 9 record according to the present invention can make its circulation to the pressurized with fluid of all states such as water of water, air, band bubble.Here, with the relative velocity and the blade circular velocity angulation of the fluid of blade inlet portion, export department,, be called inlet angle and exit angle according to the convention of turbo fluid machine.In addition, the size of motor is as long as have the power output that can drive each load torque.

The invention of claim 10 record, it is cleaning and drying machine for tableware based on claim 9 record, have centrifugal pump, this centrifugal pump has impeller, and the backward leaning vane shape portion of the 1st centrifuge blade of impeller is connected with the circular shape of omiting curve with forward curved vane shape portion.The blade shape of claim 9 record, the flow direction from backward leaning vane shape portion to the fluid the forward curved vane shape portion changes rapidly.

Therefore, among the present invention,, the generation of eddy current can be prevented,, pump performance can be improved because the path loss reduces between blade by lowering the mobile variation rapid in this inflection point.

The invention of claim 11 record, be on the cleaning and drying machine for tableware basis of

claim

9 or 10 records, have centrifugal pump, in this centrifugal pump, be provided among some the 2nd centrifuge blades between the 1st centrifuge blade, with respect to the inlet angle of the 2nd forward position of preset rotating direction and relative centrifuge blade, greater than the inlet angle of other the 2nd centrifuge blade with the 1st centrifuge blade.

Usually, centrifugal impeller with backward leaning vane, among the fluid of blade exit peripheral part, because the leg-of-mutton relation of fluid velocity, convection cell is given near the angle (the outflow angle of fluid) of the absolute velocity vector that flows the blade of energy side, less than near the angle of the absolute velocity vector the backward leaning vane of not giving energy side.

When adopting air blast, the fluid that flows through mainly is the air of compressible fluid, and air accumulation is in the forward position of the regulation direction of rotation of blade, as long as near the angle of the absolute velocity vector that the inlet angle of the 2nd centrifuge blade is coincide obtain blade.

But, when pressurization incompressible fluid, for example water etc., at the inlet portion of the 2nd centrifuge blade, the forward more position of preset rotating direction relatively, the absolute velocity vector angle of fluid is big more, so the inlet angle of the 2nd centrifuge blade also must be coincide with it.

Therefore, according to the present invention, the path loss of the blade during incompressible fluids such as attenuating pressure (hydraulic) water can realize more high efficiency pump.

The cleaning and drying machine for tableware of claim 12 record, it is characterized in that, be provided among some the 2nd centrifuge blades between the 1st centrifuge blade, be positioned at the internal diameter that leans on afterwards the position and relative with the 1st centrifuge blade the 2nd centrifuge blade at preset rotating direction, greater than the internal diameter of other the 2nd centrifuge blade.

In the invention of claim 10 record, because the backward leaning vane shape portion of the 1st centrifuge blade and forward curved vane shape portion are connected with the circular shape of curve slightly, the radius of curvature of summary curve makes that area reduces between blade between the 2nd centrifuge blade relative with the forward curved vane shape portion blade of the 1st centrifuge blade.Like this, this part becomes the reason of new gallery pressure loss, causes the generation of eddy current and effectively area of passage minimizing, and pump performance reduces and the generation of noise thereby cause.

But according to structure of the present invention, by guaranteeing effective inlet portion area of the 2nd centrifuge blade, fluid is smooth and easy mobile in the path between blade, can realize high efficiency and low noise.

The cleaning and drying machine for tableware of claim 13 record, it is characterized in that, has centrifugal pump, the 1st centrifuge blade of this centrifugal pump with in the distance between the blade of the 1st centrifuge blade front and 2nd centrifuge blade relative on the preset rotating direction with the 1st centrifuge blade, greater than the distance between the 2nd centrifuge blade or greater than the 2nd centrifuge blade with the blade pitgh between the 2nd centrifuge blade front and 1st centrifuge blade relative on the preset rotating direction with the 2nd centrifuge blade from.

Transport (for example high rotationization of impeller rotation, impeller outer diameter ever-larger diameters etc.) in the pump of big flow water, when incompressible fluid is water, flow through interlobate water to be subjected to centrifugal force, be partial to forward side flow with respect to the direction of rotation of blade.During air-supply too.

Among the present invention, with respect to the area of passage between the 1st centrifuge blade of the forward side of direction of rotation and the blade between the 2nd centrifuge blade, greater than other area of passage, thus, guarantee the area of passage that great deal running water is crossed, when big flow pressurizes, do not produce the stream loss yet, can realize big flow, high efficiency pump.

The cleaning and drying machine for tableware of claim 14 record is characterized in that, has the washer jet of the jet of accommodating the rinse bath that is cleaned thing, band jet cleaning water, by the scavenging pump of electric motor driven impeller to the rinse water pressurization; On the impeller of scavenging pump, be provided with a plurality of inboard blades in the inside portion with respect to pivot, be provided with a plurality of outsides blade in the outside portion with respect to pivot.Therefore, in matting, rinse water is being mixed with air state when sending into scavenging pump, and the absolute velocity of the fluid that flows out from outside blade is big, so air is sent into the peripheral part of impeller rapidly.Therefore, inboard blade is full of by the little rinse water of air composite rate, the rinse water of can pressurizeing.Air and rinse water can be sent into washer jet, in the time of washer jet jet cleaning water, its rotation is normally carried out.

The cleaning and drying machine for tableware of claim 15 record, it is characterized in that, the shape of inboard blade is, with respect to the regulation direction of rotation of impeller palintrope shape towards rear-inclined, the shape of outside blade is, in order to make fluid flow out to periphery easily,, has part with respect to the antecurvature shape of regulation direction of rotation of impeller in the outermost perimembranous of impeller.

Like this, the air in the rinse water is delivered to the impeller periphery, and effectively rinse water is delivered to washer jet.Therefore, can carry out the normal operation of impeller effectively.

The cleaning and drying machine for tableware of claim 16 record is characterized in that the number of blade of outside blade is more than the number of blade of inboard blade.

Like this, the discharge rate of air is big, and the available shorter time is discharged air.

Therefore, compare, be filtered device at the rinse water of supplying with residue after a little while or in wash course and collect with general centrifugal pump, rinse water pass through the minimizing of peristome area the time etc., even air enters easily, also can pressurize, wash cycles water by impeller.That is, reduce rinse water,, also can clean running at the little state of the thermal capacity of tableware and rinse water.Therefore, even under same heating efficiency, the available short time is heated to set point of temperature to rinse water, cleaning performance that obtains stipulating and drying property.

The cleaning and drying machine for tableware of claim 17 record, it is characterized in that, constitute the little outside blade of the part of outside blade, apart from big than big outside blade and inboard blade of the distance of the interior scavenging pump housing inner face of adorning impeller, and little outside blade is provided in the interlobate space, the big outside on the extended line in inboard interlobate space.

Therefore, the space of outside blade, from the outlet that enters the mouth, and the shell inner surface of scavenging pump between total size more than keeping to a certain degree.That is,, also can not be blocked between the outside blade of impeller, can easily be discharged to the scavenging pump outside, the pressure capacity stable for extended periods of time of scavenging pump even to a certain degree the solids of following size enters in the scavenging pump.

The cleaning and drying machine for tableware of claim 18 record, it is characterized in that, have the positive and negative rotational mechanism of motor, be provided with control device, this control device is selected the impeller direction of rotation of scavenging pump, at each inter process of matting, switches the power of the injection pressure of washer jet, perhaps alternately switch to spray and press, clean and be cleaned thing at each in-process.

Therefore, in matting, make motor counter-rotating running, the shape of impeller outer lateral lobe sheet is switched to forward by direction of rotation and backwards.In the time of forward, the absolute velocity of fluid is big, the pressure capacity height of scavenging pump.Otherwise in the time of backwards, the absolute velocity of fluid is little, and the pressure capacity of scavenging pump is low.Like this, the size of the pressure capacity of changeable scavenging pump.That is, can regulate the power of the injection pressure of washer jet.Owing to be arranged on the control device that each inter process can be selected pressure capacity, have strong cleaning force that cleans the viscosity dirt and the standard cleaning power of cleaning common dirt.

In addition, because being arranged on each in-process makes motor alternately switch to regulation direction of rotation and rightabout control device, so the water yield ground that can not increase rinse water improves the pressure capacity of scavenging pump, the temporary transient injection that improves washer jet is pressed, and can realize water-saving high-pressure wash.

The cleaning and drying machine for tableware of claim 19 record is characterized in that, is provided with control device, when rinse water in the matting when predetermined temperature is following, this control device makes the impeller of scavenging pump drive towards the direction of rotation opposite with the regulation direction of rotation.

Like this, in matting, when rinse water when predetermined temperature is following, the impeller of scavenging pump is driven towards opposite direction of rotation, lower the pressure capacity of scavenging pump.That is, weaken the jet power of washer jet, can lower the cleaning noise.

Then, on one side heating be cleaned thing and rinse water, make the dirt swelling on one side.When rinse water reaches predetermined temperature when above, the impeller of scavenging pump is driven towards preset rotating direction, make the pressure capacity of scavenging pump return to standard state, thus, can clean dirt.Like this, the noise during running is lower than the running noise of standard state.

The cleaning and drying machine for tableware of claim 20 record is characterized in that, has rinse water is discharged the outer draining pump of machine, is provided with control device, and this control device drives the impeller of flushing water pump towards opposite direction of rotation in drainage procedure.

Like this, in drainage procedure, with the running of draining pump concurrently, the impeller of scavenging pump is driven in the opposite direction, rinse water is sprayed outside the machine of discharge on one side to being cleaned thing on one side from washer jet.

Therefore, on one side rinsing be attached to dirt on the tableware, the contained lighter dirt of proportion in the stirring and washing water on one side, by draining pump with its from bottom of rinse bath outside rinse water is discharged machine.And, in drainage procedure, because the impeller counter-rotating, so its inboard blade plays the effect of forward curved vane, available little load pressurization rinse water.

The cleaning and drying machine for tableware of claim 21 record is characterized in that, have the jet of accommodating the rinse bath that is cleaned thing, band jet cleaning water washer jet, separate the filter of dirt in cleaning, to the scavenging pump of rinse water pressurization; Scavenging pump has being configured on the concentric circles slightly greater than the 2nd centrifuge blade of the 1st centrifuge blade by electric motor driven the 1st centrifuge blade and external diameter and with the housing of suction inlet and outlet, in the 1st centrifuge blade position relative, be provided with the magnetic that transmits each torque with the 2nd centrifuge blade.

In this invention, the 1st centrifuge blade and the 2nd centrifuge blade both sides have magnetic (hereinafter referred to as magnetic connector), carry out two interlobate transmission of torque thus.Like this, according to the rinse water of supplying with scavenging pump and the variation (pump load) of Air mixing ratio, can make the stepless variation of rotary speed of the 2nd centrifuge blade of accompanying or follow the 1st centrifuge blade.That is, an available pump and miniature motor are except realizing the rinse water discharge and being used for can also realizing the discharge of the multi-phase flow that empty G﹠W mixes the dry air air-supply.

Therefore, according to the present invention, state regardless of the fluid of supply pump, can pressurize, discharge, so, can prevent to reduce, can realize that in other words low output makes the minimizing of water consumption and the shortening of scavenging period when cleaning, expansion wash dishes capacity because of output deficiency or residue too much wait the cleaning performance that causes.In addition, owing to, can improve drying efficiency from the wiper mechanism air-supply.

The invention of claim 22 record is based on the cleaning and drying machine for tableware of claim 21 record, it is characterized in that, the blade shape of the 2nd centrifuge blade is that exit angle is set at the above straight line of about 90 degree or omits the forward curved vane shape of curve.

Like this, at the state that air mixes with water, also can give full play to function

The invention of claim 23 record, be on the cleaning and drying machine for tableware basis of claim 22 record, it is characterized in that, the blade shape of the 1st centrifuge blade is that the inside portion has the backward leaning vane shape that is set at following straight line of about 90 degree or summary curve with respect to predetermined direction of rotation exit angle.

According to the present invention, the pressurization of rinse water is mainly undertaken by the 1st centrifuge blade of backward leaning vane shape, and because of load reduces, motor can miniaturization, can reduce the height of the wash machine portion that is made of wiper mechanism and scavenging pump.Like this, do not change the product height and just can enlarge the wash dishes volume.In addition, in cleaning, when air is sneaked into, also pump capacity can be recovered rapidly, stable cleaning performance can be obtained always.

The invention of claim 24 record is based on the cleaning and drying machine for tableware of each record in the claim 21 to 23, it is characterized in that the blade height of the 2nd centrifuge blade is higher than the blade height of the 1st centrifuge blade.

According to the present invention, the 2nd centrifuge blade is rotated in cleaning process, desires to return the fluid of impeller central portion, is retracted by the inhalation power of the 2nd centrifuge blade, can suppress the generation of secondary stream.Therefore, improve efficient, can realize miniaturization, the cost degradation of pump.According to the present invention, because the efficient of pump improves, can lower pump input power, realize miniaturization, cost degradation, enlarge the wash dishes volume, save energy.

The invention of claim 25 record, it is cleaning and drying machine for tableware based on each record in the claim 21 to 24, it is characterized in that the difference in size of the internal diameter of the external diameter of the 1st centrifuge blade and the 2nd centrifuge blade is set at more than the maximum gauge of the dirt by filter.

Among the present invention, because the gap of the 1st centrifuge blade and the 2nd centrifuge blade is set at the maximum gauge greater than the residue that passes through filter, so, even solids such as tableware fragment enter in the pump, can not hold under the arm in the gap of the 1st centrifuge blade and the 2nd centrifuge blade yet and make the pump locking motionless.

According to the present invention, for entering of foreign matter, also can guarantee high reliability, can obtain stable cleaning performance.

The invention of claim 26 record is based on the cleaning and drying machine for tableware of each record in the claim 21 to 25, it is characterized in that the number of blade of the 2nd centrifuge blade is more than the number of blade of the 1st centrifuge blade.

Among the present invention, the efficient that the 1st centrifuge blade in the time of can lowering the rinse water pressurization and the revolution difference of the 2nd centrifuge blade cause reduces, and available more small-sized motor makes scavenging pump obtain required pressurization characteristic in each operation.

According to the present invention, can be with compact structure, cheap price, cleaning performance that obtains being scheduled to and drying property.

The invention of claim 27 record, it is cleaning and drying machine for tableware based on each record in the claim 21 to 26, it is characterized in that, if during the rinse water pressurization, making the torque of the required motor 6 of the 1st centrifuge blade 1 rotation is T1, and when establishing air pressurized, making the torque of the required motor 6 of the 2nd centrifuge blade 2 rotations is T2, if the imbalance torque between magnetic is T3, then be set at T1＞T3＞T2.

Like this, even the pump of little torque capacity, also can make the rotation of big the 2nd centrifuge blade of external diameter, when the supply of rinse water than scheduled volume after a little while, even air is involved in the scavenging pump, because the 2nd big centrifuge blade of absolute velocity of effluent fluid, the air that is trapped in the housing is discharged, and the 1st centrifuge blade rinse water of can pressurizeing is when rinse water is abundant, cut off the rotation of the 2nd centrifuge blade, can only clean with the rotation of the 1st centrifuge blade.

Fig. 1 is the sectional drawing of the cleaning and drying machine for tableware of the embodiment of the invention 1.

Fig. 2 is the figure of the impeller of this embodiment of expression.

Fig. 3 is the stereogram of the impeller of the embodiment of the invention 2.

Fig. 4 is the stereogram of the impeller of the embodiment of the invention 3.

Fig. 5 is the stereogram of the impeller of this embodiment of expression.

Fig. 6 is the figure of the impeller of the expression embodiment of the invention 1.

Fig. 7 is the figure of the impeller of the expression embodiment of the invention 4.

Fig. 8 is the figure of the impeller of the expression embodiment of the invention 5.

Fig. 9 is the figure of the impeller of the expression embodiment of the invention 2.

Figure 10 is the figure of the impeller of the expression embodiment of the invention 2.

Figure 11 is the figure of the existing cleaning and drying machine for tableware of expression.

Figure 12 is the figure of the centrifugal pump structure in the expression embodiment of the invention 6.

Figure 13 is that the centrifugal pump of this embodiment of expression is wanted the figure of portion.

Figure 14 is the partial enlarged drawing of the impeller of this embodiment.

Figure 15 is that the centrifugal pump of the expression embodiment of the invention 7 is wanted the figure of portion.

Figure 16 is that the centrifugal pump of the expression embodiment of the invention 8 is wanted the figure of portion.

Figure 17 is that the centrifugal pump of the expression embodiment of the invention 9 is wanted the figure of portion.

Figure 18 be the embodiment of the invention 10 cleaning and drying machine for tableware want portion's sectional drawing.

Figure 19 is that the scavenging pump of this embodiment is wanted portion's sectional drawing.

Figure 20 is the plane of the impeller in the scavenging pump of this embodiment.

Figure 21 is the sectional drawing of the impeller in the scavenging pump of this embodiment.

Figure 22 is that another of scavenging pump of this embodiment wanted portion's sectional drawing.

Figure 23 be the embodiment of the invention 11 cleaning and drying machine for tableware want portion's sectional drawing.

Figure 24 sprays the 1st time diagram of pressing among this embodiment of expression.

Figure 25 sprays the 2nd time diagram of pressing among this embodiment of expression.

Figure 26 is the time diagram of scavenging pump running in the expression embodiment of the invention 12.

Figure 27 be the embodiment of the invention 13 cleaning and drying machine for tableware want portion's sectional drawing.

Figure 28 wants portion's sectional drawing with the scavenging pump of embodiment.

Figure 29 wants portion's sectional drawing with the scavenging pump of embodiment.

Figure 30 wants portion's sectional drawing with the scavenging pump of band guard shield among the embodiment.

Figure 31 is that the scavenging pump in the embodiment of the invention 14 is wanted portion's sectional drawing.

Figure 32 is that the scavenging pump in the embodiment of the invention 15 is wanted portion's sectional drawing.

Figure 33 is that the scavenging pump in the embodiment of the invention 16 is wanted portion's sectional drawing.

Figure 34 be the disc magnetic connector want portion's sectional drawing.

Below, with reference to the description of drawings embodiments of the invention.(embodiment 1)

Fig. 1 is the overall diagram of present embodiment cleaning and drying machine for tableware, the 1st, and rinse bath, the 2nd, the wiper mechanism of the jet 3 of band jet cleaning water, the 4th, the filter of separation rinse water dirt, the 5th, the scavenging pump of pressurization rinse water.The 6th, rinse water supply with is cleaned pump intake, the 7th, with the lead outlet of wiper mechanism 2 of rinse water.As shown in Figure 2, in scavenging pump 5, adorning the housing 11 of impeller 10 in having, this impeller 10 is setting the plectane 9 of the 1st centrifuge blade 8 and supporting the 1st centrifuge blade 8.The blade shape of the 1st centrifuge blade 8 has backward leaning vane 12 that is positioned at perimembranous and the forward curved vane 13 that is positioned at peripheral part.With respect to direction of rotation, the inlet angle [alpha] 1 of backward leaning vane 12 is set at below about 90 degree, exit angle β 1 is set at below about 90 degree.With respect to direction of rotation, the inlet angle [alpha] 2 of forward curved vane 13 is set at below about 90 degree, and exit angle β 2 is set at more than about 90 degree, and the interior perimembranous of blade is being connected with curve shape with peripheral part.The 1st centrifuge blade 8 is fixed on the output shaft of motor 14.Because the interior perimembranous of blade and peripheral part constitute with about curve, the inlet angle [alpha] 2 of peripheral part forward curved vane 13 is about 90 to spend when above, also can obtain following effect.

As fundamental characteristics, when the direction of rotation of impeller 10 is clockwise direction, though the circular velocity in centrifuge blade when rotation is identical, but because the exit angle of forward curved vane 13 is set at more than 90 degree, so because the relation of speed triangle, it is big that the absolute velocity of fluid becomes.

When the direction of rotation of impeller 10 is clockwise direction, because the exit angle β 1 of the backward leaning vane 12 of the 1st centrifuge blade 8 is below 90 degree, so, though the circular velocity during the centrifuge blade rotation is identical, but the absolute velocity of fluid is little, can velocity head be transformed to pressure head with low loss, can obtain fluid pressure efficiently.

Here, according to the convention of turbo fluid machine,, be called inlet angle and exit angle with fluid relative velocity in blade inlet portion, the export department and blade circular velocity angulation.The size of motor is as long as have the power output that can drive each load torque.

Below, the action of this scavenging pump 5 is described.Make impeller 10 clockwise directions rotation by motor 14 earlier with the 1st centrifuge blade 8.From suction inlet 6 import water in the housings 11 by impeller 10 pressurizations after, discharge from outlet 7.In addition, similarly, make the rotation of the 1st centrifuge blade 8 clockwise directions during air pressurized, mainly, use so also can be used as air blast by backward leaning vane 12 pressurizations by motor 14.Especially when sending air, the backward leaning vane 12 of the 1st centrifuge blade 8 flows into air smoothly, plays the effect as the directive wheel of inlet guide blade.So, than more can realize big air quantity, low input, high efficiency with the common Sirocco fan of diameter.

When the following describes the water that when the liquid that contains gas, for example contains bubble and supplying to scavenging pump 5, when having a large amount of air in housing 11 inside when perhaps starting etc., can not make the action under the condition of these fluids circulations with existing scavenging pump.There is the situation of a large amount of air in hypothesis housing 11 inside earlier.At this moment, motor 14 exists a large amount of air after just having begun rotation in the backward leaning vane 12, and scavenging pump 5 is in the low state of discharge ability.

But, be present in the air in the backward leaning vane 12, by means of the discharging performance of forward curved vane 13, promptly suck, be discharged to outside the housing 11.Because this action, air disappears from the rotary area of the 1st centrifuge blade 8, has been full of water around the 1st centrifuge blade 8, is returned to the common operating condition of pressure (hydraulic) water.

In operation process, the residue of tableware is deposited in filter 13 places, cause when filter 13 stops up, in existing pump, make scavenging pump produce pulsation with air gun, scavenging pump is discharged and is pressed from zero near the cataclysm periodically positive normal pressure, therefore, cleaning performance significantly reduces, and also produces noise in scavenging pump.

But,,, also can so scavenging pump 5 can be guaranteed stable pump pressure, keep high cleaning performance with outside the same ground excavationg pump that is swift in motion even a large amount of bubbles is sneaked in the pump 5 according to impeller of the present invention.

Especially have a large amount of air in the housing 11 and under the few situation of water, by above-mentioned action, just begun the pressure capacity that the back just can obtain pump in running, so self-supporting effect is that scavenging pump of the present invention 5 is peculiar.

In addition, because also high as the performance of air blast, when dry, by making the scavenging pump rotation, just can be from wiper mechanism to the tableware injection air, so, also can be used as drying and use with air blast.

According to cleaning and drying machine for tableware of the present invention, the state of the fluid of nothing wheel supply scavenging pump how, can pressurize, discharge, can prevent to cause the cleaning performance reduction because of output deficiency or residue too much wait, perhaps, can realize that minimizing makes water consumption, shortens the duration of runs, reduces power consumption with low output cleaning.In addition, owing to, can improve drying efficiency from the wiper mechanism air-supply.Compare with impeller with diameter, with than turbine type impeller with low speed rotation, so, can lower the NZ sound that produces at impeller and blade part, can realize low noise.

As shown in Figure 6, under situation with blade shape portion 15, (this blade shape portion 15 does concavity to forward curved vane 13 with respect to the regulation direction of rotation, and exit angle β 2 is set at less than 90 degree) because the further load that reduces impeller 10, so, can lower the input power of pump significantly.At this moment, though the discharging performance of air reduces, when drive motor adopted induction conductivity, impeller rotation rose, and the reduction of above-mentioned air discharging performance can be suppressed at Min..

Owing to can adopt the pump drive motor of littler shape, so, can realize the cleaning and drying machine for tableware of cost degradation and miniaturization.In addition, about blade shape, when the exit angle β 2 not enough about 90 of forward curved vane 13 spends, present embodiment, in Fig. 6, use the curve definitions forward curved vane, though the global shape of blade is about S font, but the shape of the connecting portion of forward curved vane, backward leaning vane or forward curved vane and backward leaning vane also can be considered compound etc. with rectilinear form or single curve, composite curve or curve and straight line.Among these shapes, though the two-dimensional flow that produces on the hydrodynamics or the shape of loss are also arranged,, they are the shapes that can give full play to effect of the present invention.

In the present embodiment, impeller is illustrated, but, also can obtains equal above effect with the present invention for the closed blade that is provided with guard shield with open blade structure.(embodiment 2)

Because essential structure is identical with embodiment 1, so following employing Fig. 3 illustrates the latent structure among the embodiment 2.The impeller 20 of present embodiment, the blade height H1 of peripheral part forward curved vane 21 be set at the blade height H2 of interior perimembranous backward leaning vane 22 on an equal basis below.

The blade shape that this blade height changes except shown in Figure 3, also can be considered as Fig. 9 and shape as shown in Figure 10, and blade height is changed etc. gradually, can prevent to produce between blade eddy current, prevents the reduction that path loses.

Elemental motion is identical with embodiment 1, and its explanation is omitted.

According to hydromechanical principle of similarity, flow is directly proportional with 3 powers of blade height, and pressure is directly proportional with 2 powers of blade height, and pump power is directly proportional with 5 powers of blade height.Therefore, when the main cause that influences the pump input power size was the blade height H1 attenuating of forward curved vane 21, because of the reduction of input power and the minimizing of load torque, impeller rotation rose, and thereupon, discharge pressure, flow increase.That is to say, can lower the input power of pump widely, and reduce the discharging performance and the ability of air hardly.Therefore, can adopt small-sized motor, clean volume and enlarge, maybe can make the cleaning and drying machine for tableware miniaturization owing to the miniaturization of wash machine portion makes.

In the present embodiment, be impeller to be illustrated, but, also can obtain equal above effect with the present invention for the closed blade that is provided with guard shield with open blade structure.In addition, the shape of the connecting portion of forward curved vane, backward leaning vane or forward curved vane and backward leaning vane can be considered compound etc. with rectilinear form or single curve, composite curve or curve and straight line.Among these shapes, though the two-dimensional flow that produces on the hydrodynamics or the shape of loss are also arranged,, they are the shapes that can give full play to effect of the present invention.(embodiment 3)

Essential structure is identical with embodiment 1, and employing Fig. 4 illustrates the latent structure among the embodiment 3 below.The impeller 33 of this embodiment, peripheral part forward curved vane 32 is divided into 2 parts along the direction that is roughly parallel to plectane 31, the lower side blade of vertical direction is made of the 2nd backward leaning vane 35, the exit angle β 3 of the 2nd backward leaning vane 35 is below about 90 degree, and, with interior 30 slick and sly connections of perimembranous backward leaning vane.The upper side blade of vertical direction is the above forward curved vanes 32 of 90 degree as exit angle β 4.

Elemental motion is identical with embodiment 1, so the only action of characterization.

The exit angle of impeller 33 is set at more than 90 degree, and the increase of pump power and dynamic pressure increase can cause the reduction of pump pressure.Especially when pump input power improves, can produce the aspect problem such as cooling, durability of motor.Therefore, under the situation of the input power that does not improve motor as far as possible, seek the discharging performance and the pump performance of air and deposit.

According to structure of the present invention, the part of the blade shape of blade peripheral part, change to backward leaning vane 35 from forward curved vane 32, like this, can realize the attenuating of pump power and the raising of pump performance.And, in plectane 31 sides the 2nd backward leaning vane 35 is set, forward curved vane 32 is set at an upper portion thereof, constitute impeller 33 like this, can not reduce the discharging performance of air thus.Because, by the interlobate bubble of impeller 33, towards upper impeller rising on one side flow on one side, in this structure, owing to disposed forward curved vane 32 on top, so the air discharging performance is fine.

According to this structure, not only can keep the air discharging performance, and, in the invention of claim 2 record, improve the characteristic of power, because in the impeller outer perimembranous the 2nd backward leaning vane 35 is set, so, impeller adiabatic efficiency improved, improve pump performance (flow, discharge pressure), improved cleaning performance.

In addition, also can consider forward curved vane 32 to be set, the 2nd backward leaning vane 35 is set near the suction inlet of impeller 33, when the suction inlet 6 of impeller 33 is configured in impeller 33 bottoms, use in plectane 31 sides.In addition, when impeller was used for horizontal direction, the position of the 2nd backward leaning vane 35 and peripheral part forward curved vane 32 relation did not influence effect of the present invention.

As shown in Figure 5, in the scope of not discharging, connect the end face of forward curved vanes 32 and the end face of the 2nd backward leaning vane 35 with omiting plane 34 from impeller 33 peripheries.Like this, forward curved vane 32 can separate with the flowing of fluid between the backward leaning vane 35, can lower the disorder of the fluid of impeller 33 peripheral parts significantly.Therefore, can reduce the stream loss, improve pump performance.In addition, owing to constitute the end face of forward curved vanes 32 and the end face of the 2nd backward leaning vane 35, can improve the mechanical strength of forward curved vane 32 and the 2nd backward leaning vane 35 with omiting plane 34.Like this, but the thickness of the blade that attenuate raising blade strength is used, the realization lightweight.Because impeller can adopt material more at a low price, can lower the cost of impeller.

In addition, can prevent the noise that the turbulent flow of fluid causes.Like this, can lower the scavenging pump noise, improve cleaning performance.

In the present embodiment, impeller is described, but, also can obtains equal above effect with the present invention for the closed blade that is provided with guard shield with open blade structure.In addition, the shape of the connecting portion of forward curved vane, backward leaning vane or forward curved vane and backward leaning vane also can be considered compound etc. with the shape of straight line or single curve, composite curve or curve and straight line.Among these shapes, though the two-dimensional flow that produces on the hydrodynamics or the shape of loss are also arranged,, they are the shapes that can give full play to effect of the present invention.(embodiment 4)

Essential structure is identical with embodiment 1, below with reference to Fig. 7 latent structure among the embodiment 4 is described.Between the blade of the 1st centrifuge blade 40, set a slice or some the 3rd centrifuge blade 41, the 3 centrifuge blades 41 and having backward leaning vane 42 that is positioned at perimembranous and the forward curved vane 43 that is positioned at peripheral part.With respect to the direction of rotation of regulation, the inlet angle [alpha] 3 of backward leaning vane 42 is set at below about 90 degree, and exit angle β 6 is below about 90 degree.The exit angle β 7 of forward curved vane 43 is set at more than about 90 degree.

The internal diameter blade of the 3rd blade is greater than the internal diameter blade of the 1st centrifuge blade.

Adopt this structure, can carry out rectification, can make it reduce stream loss ground and pass through the fluid that between the 1st centrifuge blade and peripheral part forward curved vane, flows.

As a result, can reduce the power of pump, improve pump performance.Certainly, also improve the discharging performance of air more, can reduce output significantly.

According to the present invention, can improve the discharging performance of air, or improve pump performance, lower the power of pump, can economize on water, save time, the cleaning performance when improving just often with obstruction.Can make the miniaturization of pump drive motor, thereby the cleaning and drying machine for tableware that can realize cost degradation and miniaturization can be provided.In addition, because the blade pitgh of blade inlet portion is from reducing, because set the internal diameter of the 3rd centrifuge blade greater than the maximum diameter of the foreign matter by filter, so, the foreign matter obstruction can not take place in the impeller.

In the present embodiment, be impeller to be described, but, also can obtain equal above effect with the present invention for the closed blade that is provided with guard shield with open blade structure.In addition, the shape of the connecting portion of forward curved vane, backward leaning vane or forward curved vane and backward leaning vane also can be considered compound etc. with the shape of straight line or single curve, composite curve or curve and straight line.Among these shapes, though the two-dimensional flow that produces on the hydrodynamics or the shape of loss are also arranged,, they are the shapes that can give full play to effect of the present invention.(embodiment 5)

Essential structure is identical with embodiment 1, below with reference to Fig. 8 latent structure among the embodiment 5 is described.

The impeller 45 of present embodiment mainly is made of backward leaning vane 46 that is positioned at perimembranous and the forward curved vane 47 that is positioned at peripheral part, and backward leaning vane 46 mainly carries out the discharge of rinse water, and forward curved vane 47 is discharged to the water of band bubble outside the impeller 45 when air is sneaked into.Internal diameter, external diameter or the blade height of interior perimembranous backward leaning vane 46 and peripheral part forward curved vane 47 are set at: make between the blade of volume 48 and interior perimembranous backward leaning vane 46 between the blade of peripheral part forward curved vane 47 volume 49 for more than equal.

The following describes the action of present embodiment.Entered the bubble in the pump, at first at impeller eye 50 places, because of its volume of negative pressure sharply expands.Under this state by the blade of interior perimembranous backward leaning vane 46 between stream 51, again with higher absolute velocity by stream 52 between the blade of peripheral part forward curved vane 47, outside the outlet excavationg pump of pump.At this moment, if the air of peripheral part forward curved vane 47 is discharged the rinse water inlet capacity that ability is not higher than interior perimembranous backward leaning vane 46, then can not continue to discharge the rinse water that is mixed with bubble.But among the present invention, because the blade volume 48 of the high peripheral part forward curved vane 47 of air discharging performance is greater than the blade volume 49 of interior perimembranous backward leaning vane 46, so, the air in the stream 51 between the blade of perimembranous backward leaning vane 46 in being trapped in can be discharged in early days.

Therefore, water-saving result is better, shortens the duration of runs, and noise when lowering plugged filter improves cleaning performance.

In addition, volume 48 between the blade of peripheral part forward curved vane is set at and the blade of impeller suction portion volume 53 and interior perimembranous backward leaning vane between volume 49 sums equal when above, can strengthen the blade volume of peripheral part forward curved vane, improve the air discharging performance of impeller more.Especially when using high pressure or high temperature rinse water in the scavenging pump, the air in the intake impeller sharply expands, and in order to ensure the discharging performance of pump, must discharge this air in early days.

Therefore, according to the present invention,, also can guarantee sufficient discharging performance even sucked the air that is full of whole impeller.

In addition, when using high-pressure pump or discharging hot water, can economize on water more, shorten the duration of runs, noise when lowering plugged filter, improve cleaning performance.

In the present embodiment, be impeller to be described, but, also can obtain equal above effect with the present invention for the closed blade that is provided with guard shield with open blade structure.In addition, the shape of the connecting portion of forward curved vane, backward leaning vane or forward curved vane and backward leaning vane also can be considered compound etc. with the shape of straight line or single curve, composite curve or curve and straight line.Among these shapes, though the two-dimensional flow that produces on the hydrodynamics or the shape of loss are also arranged,, they are the shapes that can give full play to effect of the present invention.(embodiment 6)

Among Figure 12 and Figure 13, the 101st, have the impeller of the 1st centrifuge blade 104 and the 2nd centrifuge blade 105.The backward leaning vane shape portion 102 that the 1st centrifuge blade 104 has at central part has antecurvature blade shape with forward curved vane shape portion 103, the 2 centrifuge blades 105 that extend in its outside.The 106th, have the housing of fluid intake 107 and outlet 108.The blade shape of the 1st centrifuge blade 104 is, from the periphery of impeller 101 towards the center, form earlier towards with the crooked forward curved vane shape portion 103 in direction of rotation rightabout projection ground, form then towards the crooked highlightedly backward leaning vane shape portion 102 of direction of rotation.The 109th, drive the motor of these centrifuge blades.Housing 106 is formed by the vessel 106a and the container cover 106c of interior dress impeller 101, and the output shaft that this container cover 106c has at the motor 109 of housing 106 inside partly seals parts 106b with the axle of fluid sealing.The 1st centrifuge blade 104 and the 2nd centrifuge blade 105 are fixed on the output shaft of

motor

109, and 2 centrifuge blades rotate synchronously.Above-mentioned main composition key element constitutes the centrifugal pump 110 of fluid under pressure or gas.

As shown in figure 14, establishing direction of rotation is clockwise direction, and the backward leaning vane shape portion 102 of the 1st centrifuge blade 104 adopts inlet angle [alpha] 1, exit angle β 1 to be set at the following so-called turbo blade shape of about 90 degree.Above-mentioned forward curved vane shape portion 103 is the above so-called Sirocco fan shape of about 90 degree for inlet angle [alpha] 2, exit angle β 2 are set at.The 2nd centrifuge blade 105 is the above Sirocco fan shape of about 90 degree for inlet angle [alpha] 3, exit angle β 3 are set at.Fundamental characteristics is, the 2nd centrifuge blade 105, and when direction of rotation was clockwise direction, though the circular velocity during the centrifuge blade rotation is identical, because the relation of discharge velocity triangle, the absolute velocity of fluid was big, can obtain the big inhalation power to gas.Therefore, compare, have bigger inhalation power than merely strengthening external diameter increasing circular velocity with the 1st centrifuge blade 104.

The backward leaning vane shape portion 102 of the 1st centrifuge blade 104, if direction of rotation is a clockwise direction, because exit angle β 1 is below 90 degree, so, though the peripheral speed during the centrifuge blade rotation is identical, but the absolute velocity of fluid is little, and available low loss is transformed to pressure head with velocity head, can obtain the liquid plus-pressure effectively.

The following describes the action of this centrifugal pump 110.

Driving the impeller 101 with the 1st centrifuge blade 104 and the 2nd centrifuge blade 105 by motor 109 earlier rotates toward the clockwise direction.From the water that suction inlet 107 imports in the housing 106, after each centrifuge blade pressurization, discharge from outlet 108.In air pressurized, similarly, the 1st centrifuge blade 104 and the 2nd centrifuge blade 105 are rotated toward the clockwise direction by motor 109.So, mainly, also can be used as air blast and use by 105 pressurizations of the 2nd centrifuge blade.Especially when sending air, except the forward curved vane shape portion 103 and the 2nd centrifuge blade 105 of the 1st centrifuge blade 101, the 1st centrifuge blade 101 rotates similarly, the backward leaning vane shape portion 102 of the 1st centrifuge blade 101 is as the inlet guide blade that makes the smooth and easy inflow of air, has the function of inducing, so, have bigger air quantity than general Sirocco fan with diameter.

Below, the liquid that contains gas is described, when the water that for example contains bubble supplies to centrifugal pump 110, when having a large amount of air in housing 106 inside when perhaps starting etc., can not make the action under the condition of these liquid circulations with existing centrifugal pump.

There is the situation of a large amount of air in hypothesis in housing 106 earlier.At this moment, motor 109 rotates the 1st centrifuge blade 104 and the 2nd centrifuge blade 105 clockwise directions.After motor 109 has just begun rotation, in the 1st centrifuge blade 104, exist a large amount of air, the water in 105 stirring shell of the 2nd centrifuge blade 106, centrifugal pump 110 is not discharged liquid.

But the absolute velocity of the liquid that flows out from the 2nd centrifuge blade 105 is big, by the inhalation power of the 2nd centrifuge blade 105, with the short time will be trapped in housing 106 inside, especially the bubble and the air of the rotary area of the 1st centrifuge blade 104 are discharged its outside.By this action, air disappears from the rotary area of the 1st centrifuge blade 104, has been full of water around the 1st centrifuge blade 104, can pressure (hydraulic) water.Like this, the air that is present in the housing 106 is pushed out, and through the 2nd centrifuge blade 105, discharges from outlet 108.

In operation process,,, can keep the stable state that pumps up water with same action even a large amount of bubbles is sneaked into again.Like this, can and make its circulation to the water pressurization that contains bubble.

In housing 106, have a large amount of air to exist and water after a little while, by above-mentioned action, just begun the pressure capacity that the back just can obtain pump in running, this self-supporting effect is that centrifugal pump of the present invention is peculiar.

When discharge water, from the fluid that the 1st centrifuge blade comes out, put fruit by the rectification of the 2nd centrifuge blade, can flow out effectively, the efficient of pump is that general turbine pump is for more than equal.

Like this, according to the present invention, can provide can be to water, air, be mixed with the centrifugal pump of pressurized with fluid circulation of all states such as water of bubble.In addition, as long as the size of motor has the power that can drive each load torque.In addition, as the cleaning machine centrifugal pump, has following effect.

The 1st, can use the high cleaning agent of foam degrees.The 2nd, when the cleaning water level changes for some reason, even low water level and few water yield also can be brought into play the function as scavenging pump.That is,, can economize on water because the minimizing of water consumption and heat time heating time are shortened, energy-conservation, saving resource.The 3rd, utilize to the drying fan of tableware jet drying wind owing to can be used as from the washer jet of tableware jet cleaning water, so, needn't use drying fan device special-purpose in the prior art, can realize miniaturization, the cost degradation of portion of mechanism.(embodiment 7)

Essential structure is identical with embodiment 6, the following describes the latent structure among the embodiment 7.Among Figure 15, the backward leaning vane shape portion 102 of impeller 101 is connected with the circular shape 111 of forward curved vane shape portion 103 usefulness summary curve.Be provided among several the 2nd centrifuge blades 105 between the 1st centrifuge blade 104, with respect to the internal diameter of regulation direction of rotation, greater than the internal diameter of the 2nd other centrifuge blade 105 by the 2nd position, back and relative centrifuge blade 112 with the 1st centrifuge blade 104.

Elemental motion is identical with the foregoing description 1, below the action of a characterization.

The air that enters from the suction inlet 107 of impeller 101 or the part of water, pressurized on one side in the path between blade along backward leaning vane shape portion 102, on one side, further improve flow velocity, at last from outlet 108 discharges by between next forward curved vane shape portion 103 and the 2nd centrifuge blade 105.At this moment, because backward leaning vane shape portion 102 and forward curved vane shape portion 103 be connected with the circular shape 111 of curve slightly, so, flow through more swimmingly along the fluid of blades flows, can not cause that path loses increase because of disengaging produces eddy current.

In addition, because the internal diameter of the 2nd centrifuge blade 112 is greater than the internal diameter of other the 2nd centrifuge blade 105, guarantee area between the blade of above-mentioned slightly curve shape portion 111 and the 2nd centrifuge blade 112, so fluid can flow to the 2nd centrifuge blade 112 from the 1st centrifuge blade 104 swimmingly.When air-supply, also can be used as the low-noise fan utilization.

Therefore, in the present embodiment, can lower the rapid mobile variation in inflection point place, and guarantee flow path area between the blade of the 1st centrifuge blade and the 2nd centrifuge blade, thus, can reduce that eddy current produces and blade between the path loss, improve pump performance and realization low noiseization.

In addition, as the cleaning machine centrifugal pump, has following effect.

The 1st, can use the high cleaning agent of foam degrees.The 2nd, when the cleaning water level changes for some reason, even low water level and few water yield also can be brought into play the function as scavenging pump.The 3rd, owing to the washer jet that can be used as to tableware jet cleaning water uses to the low noise drying fan of tableware jet drying wind, so, needn't use drying fan device special-purpose in the prior art, can realize miniaturization, the cost degradation of portion of mechanism.(embodiment 8)

Essential structure is identical with embodiment 6, the following describes the latent structure among the embodiment 8.Among Figure 16, be provided among some the 2nd centrifuge blades 105 between the 1st centrifuge blade 104, with respect to the inlet angle [alpha] 4 of the 2nd regulation direction of rotation forward position and relative centrifuge blade 120 inlet angle [alpha] 3, be the low-angle dip shape greater than another the 2nd centrifuge blade 105 with the 1st centrifuge blade 104.

Basic action is identical with embodiment 6, below the action of a characterization.

Usually, have the impeller of backward leaning vane, have the speed triangle relation of fluid.That is, among the fluid of blade exit peripheral part, convection cell invests near the angle (the outflow angle of fluid) of the mobile absolute velocity vector the blade of energy side, gives near the angle of the absolute velocity vector the backward leaning vane of energy side less than convection cell not.

Under the situation that adopts air blast, fluid is based on the air of compressible fluid, because air accumulation is forward position on the regulation direction of rotation, so, in the time of can be with the inlet angle of the 2nd centrifuge blade and near the angle of the absolute velocity vector that blade, obtains involutory.

But, during at the pressurization incompressible fluid, as water etc., for the inlet portion of the 2nd centrifuge blade, forward more position on preset rotating direction, the angle of the absolute velocity vector of fluid is big more, so the inlet angle of the 2nd centrifuge blade also must be coincide with it.

Therefore, in the present embodiment, set inlet angle [alpha] 4 in the mode that becomes level along the grain direction that is flowing in the fluid that is positioned at forward position and the 2nd centrifuge blade 120 relative on the preset rotating direction with the 1st centrifuge blade 104.Like this, can lower flow path resistance, obtain maximum rectification effect with respect to the 2nd centrifuge blade 120.

According to the present invention, especially when incompressible fluids such as pressure (hydraulic) water, can reduce the path loss of blade, realize more high efficiency pump.In addition, as the centrifugal pump that cleaning machine is used, has following effect.

The 1st, can use the high cleaning agent of foam degrees.The 2nd, when the cleaning water level changes for some reason, even low water level and few water yield also can be brought into play the function as scavenging pump.The 3rd, use to the low noise drying fan of tableware jet drying wind owing to can be used as from the washer jet of tableware jet cleaning water, so, needn't use drying fan device special-purpose in the prior art, can realize miniaturization, the cost degradation of portion of mechanism.(embodiment 9)

Essential structure is identical with embodiment 6, the following describes the latent structure among the embodiment 9.Among Figure 17, the 1st centrifuge blade 104 with in the distance 121 between the blade of the 1st centrifuge blade 104 fronts and 2nd centrifuge blade 105 relative on the preset rotating direction with the 1st centrifuge blade 104, greater than the distance 123 between the 2nd centrifuge blade 105 or greater than the 2nd centrifuge blade 105 with in the blade pitgh between the 2nd centrifuge blade 105 fronts and 1st centrifuge blade 104 relative on the regulation direction of rotation with the 2nd centrifuge blade 105 from 122.

Especially in sending the pump structure of big flow water (for example make impeller the rotation number high speed, make impeller outer diameter ever-larger diameters etc.), when incompressible fluid is water, because flowing through interlobate water is subjected to centrifugal action, so, be partial to respect to the direction of rotation of blade by flowing (this to air-supply time too) ventrally.

In the structure of present embodiment, other blade pitgh from 122,123 (the 1st centrifuge blade with on the preset rotating direction the blade pitgh of the 1st centrifuge blade back and 2nd centrifuge blade 105 relative with the 1st centrifuge blade from or the 2nd centrifuge blade 105 between distance), than the blade pitgh among other embodiment from narrow, as mentioned above, in centrifugal impeller, interlobate fluid is under centrifugal action, the ejection of fluid secund blade-side ground, forward side on direction of rotation produces the two-dimensional flow of the stream that circles round etc. because of negative pressure.

But, in the structure of present embodiment since between this blade the zone, the blade pitgh of constriction the 2nd blade from, so, improve the effect of rectification two-dimensional flow on the contrary, raise the efficiency.

As mentioned above, in the present embodiment,, set greater than other area of passage with the area of passage between the 1st centrifuge blade of forward side on the direction of rotation and the blade between the 2nd centrifuge blade, like this, can guarantee in the 2nd centrifuge blade effective area of passage, improve rectification effect and performance, realization low noise.

As the centrifugal pump that cleaning machine is used, has following effect.

The 1st, can use the high cleaning agent of foam degrees.The 2nd, when the cleaning water level changes for some reason, even low water level and few water yield also can be brought into play the function as scavenging pump.The 3rd, use to the low noise drying fan of tableware jet drying wind owing to can be used as the washer jet of tableware jet cleaning water, so, needn't use drying fan device special-purpose in the prior art, can realize miniaturization, the cost degradation of portion of mechanism.(embodiment 10)

Figure 18 is the overall diagram of present embodiment cleaning and drying machine for tableware.Among Figure 18 and Figure 19, the 201st, rinse bath, the 202nd, accommodate the tableware basket that tableware, kitchen utensils etc. are cleaned thing, the 203rd, the scavenging pump of pressurization rinse water, the 204th, the impeller of scavenging pump 203, the 205th, drive the motor of this impeller 204, the 206th, the heater of heated wash water, the 207th, the washer jet of the jet of band jet cleaning water, the 208th, rinse water is discharged the outer draining pump of machine.The 209th, the control device of runnings such as control scavenging pump 203, heater 206.

As shown in figure 20, impeller 204 has the inboard blade 204a of palintrope and antecurvature outside blade 204b.In the inboard, with respect to the regulation direction of rotation, its exit angle is set at below 90 degree inboard blade 204a with respect to pivot.Outside blade 204b is in the outside, and its exit angle is set at more than 90 degree.Outside blade 204b sheet number is more than inboard blade 204a.That is, outside blade 204b has big outside blade 204b1 and little outside blade 204b2, and little outside blade 204b2 is in the centre of big outside blade 204b1.

As shown in figure 21, outside blade 204b forms height 2 kinds more than the height at least, is made of the big outside blade 204b1 of height H 1 and the little outside blade 204b2 of height H 2.Big outside blade 204b1 configuration as shown in figure 22 not adjacent to each otherly.

Below, the action of present embodiment dish cleaning machine is described.Running in the matting, basically with prior art in identical, its explanation is omitted.The feature of present embodiment action is the action of scavenging pump 203 in the matting.

In matting, along with the carrying out of operation, residue is trapped in the filter place, and rinse water is difficult to supply with scavenging pump 203.Under the inhalation power effect of scavenging pump 203, rinse water is admitted to scavenging pump 203 at the state that has air to sneak into.At this moment the absolute velocity of the fluid that flows out from outside blade 204b is big, so air is admitted to the peripheral part of impeller 204.

Therefore, the inboard blade 204a of impeller 204, the rinse water little by the air composite rate is full of, the rinse water of can pressurizeing.Air and rinse water can be sent into washer jet 207,, normally carry out its rotation simultaneously from washer jet 207 ejections.In addition, because big outside blade 204b1 and little outside blade 204b2 count sum more than inboard blade 204a number.So the delivery flow of air increases, the available shorter time is discharged air.

Like this, available impeller makes its circulation to the rinse water pressurization that contains air condition, so, in the present embodiment, when using general centrifugal pump, the cleaning water yield ratio of supplying with in matting compares, and can be still less.Therefore, the thermal capacity of rinse water and tableware is little, if the heating efficiency of heater 106 is identical, then can be heated to set point of temperature in shorter time.

In matting, when the installation of filter is incorrect when waiting, a certain size the following foreign matter by the 2nd filter (the 2nd filter prevents that foreign matter from sneaking into, and figure does not show) can enter in the scavenging pump 203.But, in the present embodiment, many and the little outside blade 204b in space of lobe numbers, having blade height is H1 big outside blade 204b1 different with H2 and little outside blade 204b2, and big outside blade 204b1 is disposing not adjacent to each otherly, so, from the outlet that enters the mouth, the space total energy between the blade 204b of the outside keeps certain above size

Therefore, even foreign matter 204c enters scavenging pump 203, also the space that can be formed by the outside blade 204b of the pump case of as shown in Figure 22 scavenging pump 203 and impeller 204 is got rid of in the outside of scavenging pump 203, is not resulted in blockage because of foreign matter 204c.For example, the interlobate foreign matter 204c of the inboard blade 204a by scavenging pump 203 inlet portions, in the outside portion of impeller 204, the space that the inner face 203a by little outside blade 204b2 and scavenging pump 203 forms is discharged to outside the scavenging pump 203.Therefore, under various operating conditions, the pressure capacity of scavenging pump 203 all is stable.

Like this, can stably keep the pressure capacity of scavenging pump 203, reduce the output of rinse water.Thereby, in matting and heating rinsing process, under identical heating efficiency, can shorten that rinse water is heated to predetermined temperature needed heat time heating time.That is to say that cleaning performance that can obtain being scheduled to and drying property are realized water saving, shortened the matting duration of runs and economize on electricity.

In addition, according to the kind and the amount of dirt, carry out in each operation of rinsing in the replacing rinse water, even further reduce rinse water, it is stable that the pressure capacity of scavenging pump 203 also can keep, so, can spray normally from washer jet 207, can obtain required wash effect.Certainly, also can shorten the time and the economize on electricity of heating rinsing.

In the drying process, with sending into air in the export-oriented rinse bath 201 of air blast (figure does not show) slave, heater 206 is turned round intermittently and form hot blast, this hot blast makes attached to the water-drop evaporation on the tableware, and the humid air in the rinse bath 101 are discharged to outside the machine from exhaust outlet (figure does not show).In the present embodiment, when carrying out the heating rinsing process with same duration of runs before, control device 209 can make tableware and the temperature of the water droplet that adheres to, than the dish cleaning machine height of structure before.Therefore, improve the rate of drying that is cleaned thing, improve drying property, shorten drying time.Like this, can shorten the whole durations of runs that comprise drying.(embodiment 11)

Present embodiment, essential structure is identical with embodiment 10, has rinse bath 201, tableware basket 202, scavenging pump 210, impeller 204, motor 205, heater 206, washer jet 207, draining pump 208.The explanation of its essential structure is omitted.As shown in figure 23, scavenging pump 210 is by positive and negative rotational mechanism 211 controls of motor 205, and the direction of rotation of scavenging pump 210 is also controlled by the control device 212 of the running of controlling scavenging pump 210 and heater 206 etc.Impeller 204 has blade similarly to Example 1.

The following describes the running in the matting.In the present embodiment, particularly in matting, by selecting the direction of rotation ground running of motor 205, the outside blade of impeller 204 is changeable for forward and backwards, the pressure capacity of scavenging pump 210 can be switched to big or little.That is to say that as shown in figure 24, though the load of scavenging pump 210 increases to W2 from W1, pressure capacity increases, play a part the injection pressure of washer jet 207 is increased to P2 from P1.Like this, can select suitable cleaning force according to the amount and the matter of dirt.

Like this, owing to be provided with the control device 212 that can select the jet power of washer jet 207 at each inter process, single dish cleaning machine can have two kinds of cleansing powers, can clean the strong cleaning force of viscosity dirt and the standard cleaning power of cleaning common dirt.

At each in-process of matting, control device 212 alternately switches to predetermined direction of rotation and rightabout with motor 205, can not increase the pressure capacity that rinse water water yield ground increases scavenging pump 210, temporarily improves the injection of washer jet 207 and presses.

Promptly, this scavenging pump 210, because of the blade effect of its impeller 204, with the scavenging pump 203 of embodiment 10 similarly, for sneaking into of air, can recover pressure capacity with the short time, so, though quantity of circulating water increases the cleaning water yield ground running that can not increase supply, as shown in figure 25, the injection that can improve washer jet 207 is pressed.

About this point,, the rinse water water yield and the quantity of circulating water of supply are increased linkedly regulating in the mechanism of revolution raising pressure capacity with receded disk impeller before.Therefore, and compare before, can economize on water and high-pressure wash, can realize the raising of cleaning force simultaneously and make the minimizing of water consumption.

In addition, in matting, when rinse water when predetermined temperature is following, the impeller 204 that control device 212 makes scavenging pump 210 is rotation in the opposite direction mainly, can finish the pressure capacity ground running of lowering scavenging pump 210.Like this, weaken the jet power of washer jet 207, can lower the cleaning noise that collides rinse bath 201 or drip and produced because of rinse water.Like this, while heat and be cleaned thing and rinse water makes the dirt swelling.

Then, when rinse water reaches predetermined temperature when above, the control device 212 main impellers 204 that drive scavenging pumps 210 are got back to standard state towards the predetermined direction rotation with the pressure capacity of scavenging pump 210, improve the jet power of washer jet 207, dirt capable of washing.That is, the cleaning performance that can obtain being scheduled to, simultaneously quietization of running noise of chien shih matting when nearly all.(embodiment 12)

The essential structure of present embodiment is identical with embodiment 11, and the explanation of essential structure is omitted.As shown in figure 23, scavenging pump 210 has positive and negative rotational mechanism 211, by control device 212 controls.The following describes the running in the drainage procedure.

In drainage procedure, in the time of with running draining pump 208, scavenging pump 210 as shown in figure 26 turns round.Make motor towards the direction rotation opposite by positive and negative rotational mechanism 211 with matting.That is, be provided with the control device 212 that impeller 204 is rotated towards the direction opposite with preset rotating direction.

Like this, when drainage procedure running scavenging pump 210, on one side from washer jet 207 to being cleaned thing jet cleaning water, on one side by draining pump 208 drainings.So, on one side flushing attached to the dirt on the tableware, the less dirt of proportion that contains in the stirring and washing water on one side, by draining pump 208 outside the bottom discharge machine of rinse bath 201.

The dirt that this proportion is less is to float over above the rinse water in drainage procedure before, even from the bottom discharge of rinse bath 1, also remain in the bottom surface easily.

And at drainage procedure, because impeller 204 counter-rotatings, its inboard blade plays the effect of forward curved vane, so, with little load pressurization rinse water.Therefore, need only the energising amount that scavenging pump 210 is appended some machines, just can obtain good wash effect.In addition, though impeller 204 is big at predetermined direction of rotation load, the injection of rinse water is also strong, so control device 212 control direction of rotation can improve wash effect.

Because of the wash effect height, according to the quality and quantity of dirt, can reduce the number of times of rinsing process, can reduce the consumption electric power that makes water consumption and whole running of each cleaning running.

As the rotation control mechanism of motor 205, also available phases control or converter control.Certainly, if motor 205 is DC brushless electric machines, but then revolution is controlled on wider scope ground.(embodiment 13)

Figure 27 is the overall diagram of present embodiment cleaning and drying machine for tableware.Among Figure 27 and Figure 28,301 is the 1st centrifuge blades, the 302nd, and external diameter is greater than the 2nd centrifuge blade of the 1st centrifuge blade 301, and the 303rd, have the housing of fluid intake 304 and outlet 305.The 306th, drive the motor of these centrifuge blades, housing 303 is made of vessel 303a and container cover 303c.Adorning centrifuge blade in the vessel 303a.Container cover 303c has axle envelope parts 303b, and 303b is fluid-encapsulated in the output shaft part of the motor 306 of housing 303 inside for these envelope parts.The 1st centrifuge blade 301 and the 2nd centrifuge blade 302 separate, and have slightly columnar magnetic 307,308 (magnetic connector) respectively, and the 1st centrifuge blade 301 is fixed with respect to the output shaft of motor 306.The torque that the 2nd centrifuge blade 302 is transmitted the 1st centrifuge blade 301 by magnetic connector 307,308 can rotate freely by sliding part 309 with respect to the output shaft of motor 306.

These are as the main composition key element of scavenging pump 310.The 311st, accommodate the tableware basket that tableware, kitchen utensils etc. are cleaned thing, the 312nd, the washer jet of jet with ejection rinse water is connected with the outlet 305 of scavenging pump 310.The 313rd, the rinse bath of interior dress tableware basket 311 and washer jet 312.The 314th, the water level detecting mechanism of detection rinse water water level.315 are provided in a side of the residual filter in the rinse bath 313.Drainage mechanism is to adopt general draining pump (figure does not show).

As shown in figure 29, when the direction of rotation of establishing centrifuge blade was clockwise direction, the inlet angle [alpha] 1 of the 1st centrifuge blade 301 and exit angle β 1 were for slightly below 90 degree.The exit angle β 2 of the blade 309 of the 2nd centrifuge blade 302 is for slightly more than 90 degree.The fundamental characteristics of this blade is, when direction of rotation is clockwise direction, because the exit angle β 2 of the 2nd centrifuge blade 302 is for slightly more than 90 degree, so, though the circular velocity during the centrifuge blade rotation is identical, because the speed triangle of outlet relation, the absolute velocity of fluid is big, also can obtain big inhalation power to gas.

Therefore, that the 2nd centrifuge blade 302 is compared with the 1st centrifuge blade 301 is big except external diameter, under identical rotation number, have circular velocity greatly, also have big inhalation power.On the other hand, the 1st centrifuge blade 301, when direction of rotation is clockwise direction, because exit angle β 1 is below 90 degree, so even centrifuge blade when rotation circular velocity is identical, but the absolute velocity of fluid is little, also can velocity head be transformed to pressure head, can obtain the liquid plus-pressure effectively with low loss.In addition, the torque of magnetic 307,308 (hereinafter referred to as magnetic connectors) is by set followingly: promptly, when rinse water is pressurizeed, suppose that making the torque of the required motor 306 of the 1st centrifuge blade 301 rotations is T1, when air pressurized, suppose that making the torque of the required motor 306 of the 2nd centrifuge blade 302 rotations is T2, suppose that the imbalance torque (torque when magnetic connector rotates not together) between the magnetic connector 307,308 is T3, then be set at T1＞T2＞T3.

The following describes its action.In common matting, for the rinse water of pressurizeing, motor 306 makes 301 counter rotations of the 1st centrifuge blade.From the water that suction inlet 304 imports in the housing 306, after each blade 301,302 pressurization, discharge from outlet 305, can be used as general centrifugal pump and use.

When water level detecting mechanism 314 detects when cleaning water level and being low water level, the water yield is few.At this moment, in order to make scavenging pump 310 with the circulation of regulation ability, sharply reduce in the operation middle water level, the water that contains air is supplied to scavenging pump 310.In dish cleaning machine before, in operation process,, then can not keep the state of pumping up water if a large amount of air is sneaked into.Therefore, the wash dishes rate is low, does not wash clean sometimes.

But in the present embodiment, in cleaning process, though the 1st centrifuge blade 301 identical with motor 306 revolutions (for example 3000 change), the load T of the 2nd centrifuge blade 302 is T＞T1, is idling rotation (900 change).Therefore, make 302 rotations of the 2nd centrifuge blade simultaneously, can discharge the air that is trapped in the housing 303 with the 1st centrifuge blade 301.

Because the exit angle β 2 of the 2nd centrifuge blade is set at slightly more than 90 degree, so the above-mentioned air velocity of discharge further improves.If the revolution of motor 306 is a timing, compare when the injection energy of washer jet 312 is normal with the cleaning water level, though because the sneaking into some and reduce of air, the pressure capacity of scavenging pump is lost can not resembling before, to such an extent as to washer jet can not rotate.

Therefore, as dish cleaning machine, the cleaning force that can obtain being scheduled to.In addition, when the air capacity in the rinse water further increased, the load torque T that the 2nd centrifuge blade 302 is subjected to reduced, and its revolution increases the discharge ability more near the revolution of the 1st centrifuge blade 301.(T2≤T＜T3), 2 blade 301,302 revolutions are identical approximately, the wind pushing performance that performance is predetermined when almost being air entirely in the housing 303.The effect of above-mentioned 2 blades 301,302 has following feature.

In matting, mainly discharge rinse water by the action of the 1st centrifuge blade 301, at this moment, rinse water is by between the 2nd centrifuge blade 302, and the rinse water of discharging from the 1st centrifuge blade 301 is had the diffuser effect of raising the efficiency by rectification.

When air is discharged, mainly discharge air by the effect of the 2nd centrifuge blade 302, at this moment, the inspiratory resistance that the 1st centrifuge blade 301 lowers the 2nd centrifuge blade 302, the effect of the inductor that performance is raised the efficiency.

Like this, magnetic connector 307,308 is used for driving transmission between the 1st centrifuge blade 301 and the 2nd centrifuge blade 302, according to the rinse water of supplying with scavenging pump 310 and the variation (pump load) of Air mixing ratio, the rotary speed of the 2nd centrifuge blade 302 of accompanying or follow the 1st centrifuge blade 301 is infinitely changed, with a pump and miniature motor, except the discharge that realizes rinse water be used for the sending into these two fluids of dry air, can also discharge the mixed flow that empty G﹠W mixes.

In addition, when the 1st centrifuge blade 301 and the 2nd centrifuge blade 302 are become the blade of one, need high price, large-scale and high torque motor 306.

But among the present invention, by magnetic 307,308 change of adjusting load torque automatically, simultaneously, the exit angle β 2 of the 2nd centrifuge blade 302 omits more than 90 degree, so, because of load torque lowers, can realize the miniaturization of motor.

In addition, the height by the wiper mechanism portion that reduces to be made of wiper mechanism and scavenging pump can not change product and enlarge the wash dishes volume to heavens.In cleaning process, during entrained air, also can recover pump capacity rapidly, so, stable cleaning performance can often be obtained.

Because the accuracy of detection of water level detecting mechanism only needs general level, so the cost of dish cleaning machine is low.

In addition, about the inlet angle of the 1st centrifuge blade 301 and the 2nd centrifuge blade 302, also can consider to be respectively 90 degree, more than 90 degree or below 90 degree, at this moment also can give full play to effect of the present invention.In addition, for the 1st centrifuge blade 301 and the 2nd centrifuge blade 302, be that open blade with no guard shield is the example explanation, but as shown in figure 30, the blade for the band guard shield also can obtain effect of the present invention.(embodiment 14)

The dish cleaning machine identical with embodiment 13 that be essential structure, the explanation of the thin portion that it is common is omitted.With embodiment 13 differences is that as shown in figure 31, the blade height of the 1st centrifuge blade 317 is greater than the blade height of the 1st centrifuge blade 301.

The elemental motion of the matting of dish cleaning machine is identical with embodiment 13, and its explanation is omitted.Characteristic action of the present invention only is described below.

Usually, in centrifugal pump, from the fluid that the centrifuge blade central portion enters, Yi Bian be subjected to the centrifugal force of centrifuge blade, Yi Bian discharge from peripheral part, its part is returned the centrifuge blade central portion of negative pressure, forms two-dimensional flow.This is one of reason that causes the reduction of centrifugal pump efficient.

But in the structure of present embodiment, the 2nd centrifuge blade 317 is formed into the top of the 1st centrifuge blade 301 that produces two-dimensional flow always, so different with common diffuser, the 2nd centrifuge blade 317 of rotation also produces attraction in above-mentioned part.Like this, desire will be returned the fluid of the 1st centrifuge blade 301 central portions, is retracted by the inhalation power of the 2nd centrifuge blade 317, can suppress the generation of two-dimensional flow.Therefore, can raise the efficiency, realize high performance, miniaturization, the cost degradation of pump.

According to dish cleaning machine of the present invention, improve the efficient of pump, can realize low-power, miniaturization, the cost degradation of pump, enlarge the wash dishes volume, save energy.In addition, adopt when jet send the drying mode of air, can realize high air quantity, shorten drying time etc., improve drying property.(embodiment 15)

The dish cleaning machine identical with embodiment 14 that be essential structure, the explanation of the thin portion that it is common is omitted.The feature of present embodiment is, shown in figure 32, the difference in internal diameters of the external diameter of the 1st centrifuge blade 301 and the 2nd centrifuge blade 302 is set at more than the maximum gauge of the dirt by residual filter 315.

When the running dish cleaning machine,, also have band to collude various foreign material such as toothpick, rubber band and dropped in the groove except attached to the food on the tableware.For these foreign material are entered in the scavenging pump 310, be provided with the residual filter 315 of protection pump 310.When designing this residual filter 315, consider the rinse water in guaranteeing to circulate and the cleaning of residual filter 315, allowing to a certain degree, the residue of size passes through.Therefore, as scavenging pump 310, consider to pass through the foreign matter of the big or small degree of residual filter 315

According to structure of the present invention, because the gap of the 1st centrifuge blade 301 and the 2nd centrifuge blade 302 is greater than the maximum diameter of the residue that has passed through residual filter 315, so, even solids such as the fragment of tableware enter in the scavenging pump 310, can not hold under the arm in the gap of the 1st centrifuge blade 301 and the 2nd centrifuge blade 302 yet and scavenging pump 310 is being locked.In addition, even enter than the bigger foreign matter of the maximum diameter of the residue that has passed through residual filter 315, because the 2nd centrifuge blade 302 is elasticity transmission structures of magnetic connector 307,308 with respect to the 1st centrifuge blade 301, so the foreign matter of being held under the arm between the 1st centrifuge blade 301 and the 2nd centrifuge blade 302 can promptly be deviate from.

Therefore,, high reliability can be guaranteed, stable cleaning performance can be obtained for entering also of foreign matter according to dish cleaning machine of the present invention.(embodiment 16)

The dish cleaning machine identical with embodiment 13 that be essential structure, its common unitary construction figure omits.As shown in figure 33, the feature of present embodiment is that the number of blade of the 2nd centrifugal film 302 is more than the number of blade of the 1st centrifuge blade 301.

Below, its action is described.The basic consideration method, identical with previous embodiment 13, the action of its feature only is described.

As described in embodiment 13, during cleaning, in the outside that is fixed on the 1st centrifuge blade 301 on the motor 306, the 2nd centrifuge blade 302 is by magnetic connector 307,308 rotations, and two centrifuge blades 301,302 exist revolution difference.This means the part of the energy of the rinse water of discharging from the 1st centrifuge blade 301, be used to make 302 rotations of the 2nd centrifuge blade, thereby the efficient of scavenging pump 310 is reduced.

In the present embodiment, the number of blade of the 2nd centrifuge blade 302 increases the load torque that the 2nd centrifuge blade 302 is subjected to when cleaning more than the number of blade of the 1st centrifuge blade 301, and the revolution of the 2nd centrifuge blade 302 is more reduced, carry out the pressure conversion of rinse water like this, effectively.Therefore, can suppress the reduction of the efficiency of pump effectively, available more small-sized motor obtains the necessary pressurization characteristic of scavenging pump.

In addition, when air is sneaked into rinse water, when air is blown, by increasing the number of blade of the 2nd centrifuge blade 302, can realize that the early stage discharge because of entrained air recovers cleaning performance, the wind pushing performance when improving air-supply etc. increase substantially the combination property of pump.Can realize the raising of cleaning efficiency and drying property.

In the foregoing description 13 to 16, wiper mechanism is the washer jet of turning arm shape, but wiper mechanism also can be fixed or slightly discoid.In addition, about the structure of magnetic connector, be to adopt cylindrical shape shown in Figure 27 or disc shown in Figure 34 or above-mentioned 2 kinds compound (figure does not show), no matter which kind of structure can both obtain same effect.In addition, in the embodiments of the invention, torque-transmitting mechanisms between the 1st centrifuge blade and the 2nd centrifuge blade is to adopt magnetic (magnetic connector), but also can adopt other torque-transmitting mechanisms, for example fluid connector such, adopt torque-transmitting mechanisms with proper viscosity fluid.

As mentioned above, the scavenging pump of cleaning and drying machine for tableware of the present invention has the mixed phase impeller of being with interior perimembranous backward leaning vane, peripheral part forward curved vane.The mixed phase impeller can be easily pressurizes and makes its circulation air, water and the water that contains air.Therefore, in all embodiment of the present invention, the mixed phase impeller not only uses as the impeller of scavenging pump but also the impeller or the dry impeller with air blast that can be used as draining pump.When the mixed phase impeller was used as the impeller of scavenging pump, the mixed phase impeller can be to containing the water pressurization of air, so, in matting, can reduce the water level of rinse water.Like this, can economize on water, and can save and add the electric power that hot water is used.In drying process, rotation is more at a high speed ejected air from washer jet when making the mixed phase impeller than matting, can shorten the drying time of tableware.During the rinsing tableware, addle is discharged, supply with new water.But, always have some addle remaining can not discharge.This remaining addle is polluted new water, so, clean in order to make washings, many more the new water that just need be many more of remaining addle.When the mixed phase impeller is used as the impeller of draining pump, because the mixed phase impeller can be to containing the water pressurization of air, so, can make the remaining seldom draining of addle.Like this, can save the new water that is used for rinsing.In addition, when using the impeller of air blast to use as drying,, play the portion's of inducing effect to the mixed phase impeller because inboard blade is introduced air in the impeller, so, compare with common Sirocco fan, can realize high air quantity, high efficiency.In addition, compare, also can guarantee same performance even reduce revolution with the common Sirocco fan of same external diameter, same blade height, so, the noise that impeller produces can be lowered.In addition, in embodiment 5 and 13, illustrated and similarly to have used band guard shield blade with no guard shield blade, but in all embodiment, can similarly use band guard shield blade with no guard shield blade.

Claims

1. cleaning and drying machine for tableware, it is characterized in that, have the scavenging pump of accommodating the rinse bath that is cleaned thing, the wiper mechanism of being with the jet of jet cleaning water, pressurization rinse water, this scavenging pump has the motor of impeller, housing and the above-mentioned impeller of driving, above-mentioned impeller is setting the plectane of the 1st centrifuge blade and supporting the 1st centrifuge blade, is adorning impeller in the above-mentioned housing and is having suction inlet and outlet; The shape of the blade of the 1st centrifuge blade is, have backward leaning vane that is positioned at perimembranous and the forward curved vane that is positioned at peripheral part, with respect to direction of rotation, the exit angle of backward leaning vane is set at below about 90 degree, the exit angle of forward curved vane is set at more than about 90 degree, and the interior perimembranous of blade is connected with curve shape with peripheral part.

2. cleaning and drying machine for tableware as claimed in claim 1 is characterized in that, the blade height of peripheral part forward curved vane be set at the blade height of interior perimembranous backward leaning vane on an equal basis below.

3. cleaning and drying machine for tableware as claimed in claim 1 or 2, it is characterized in that, the peripheral part forward curved vane is being divided into 2 parts with the slightly parallel direction of plectane, and the blade of a part is that about 90 degree are following and constitute with slick and sly the 2nd backward leaning vane that is connected of interior perimembranous backward leaning vane by exit angle.

4. cleaning and drying machine for tableware as claimed in claim 3 is characterized in that, in the scope that does not exceed the impeller periphery, the vane end faces of above-mentioned peripheral part forward curved vane end face and backward leaning vane is seamlessly connecting with omiting the plane.

5. as each described cleaning and drying machine for tableware in the claim 1 to 4, it is characterized in that the peripheral part blade shape is that its exit angle is set at less than 90 degree approximately.

6. as each described cleaning and drying machine for tableware in the claim 1 to 5, it is characterized in that, be equipped on interlobate a slice or some the 3rd centrifuge blades of the 1st centrifuge blade, have backward leaning vane that is positioned at perimembranous and the forward curved vane that is positioned at peripheral part, with respect to predetermined direction of rotation, the inlet angle of backward leaning vane is set at below about 90 degree, exit angle is set at below about 90 degree, the exit angle of forward curved vane is set at more than about 90 degree, and the internal diameter blade of the 3rd blade is greater than the internal diameter blade of the 1st centrifuge blade.

7. as each described cleaning and drying machine for tableware in the claim 1 to 6, it is characterized in that, volume between the blade of peripheral part forward curved vane, be set at and the blade of interior perimembranous backward leaning vane between volume equal more than.

8. as each described cleaning and drying machine for tableware in the claim 1 to 7, it is characterized in that, volume between the blade of peripheral part forward curved vane, be set at and the blade of impeller suction portion's volume and interior perimembranous backward leaning vane between the volume sum equal more than.

9. cleaning and drying machine for tableware, it is characterized in that, have the centrifugal pump of the scavenging pump of accommodating the rinse bath that is cleaned thing, the wiper mechanism of being with the jet of jet cleaning water, conduct pressurization rinse water, this centrifugal pump has the motor of impeller, housing and the above-mentioned impeller of driving, above-mentioned impeller is setting the 1st centrifuge blade, is adorning impeller in the above-mentioned housing and is having suction inlet and outlet; The blade shape of the 1st centrifuge blade is, have backward leaning vane shape portion that is positioned at the inside portion and the forward curved vane shape portion that is positioned at the outside portion, with respect to predetermined direction of rotation, the exit angle of backward leaning vane shape portion is set at below about 90 degree, and the exit angle of forward curved vane shape portion is set at more than about 90 degree; Between the 1st centrifuge blade, setting a slice or some the 2nd centrifuge blades respectively, the 2nd centrifuge blade has slightly curvilinear forward curved vane shape, with respect to direction of rotation, the inlet angle of the 2nd centrifuge blade is set at more than about 90 degree, exit angle is set at more than about 90 degree, and the 2nd centrifuge blade is shorter than the length of blade of the 1st centrifuge blade.

10. cleaning and drying machine for tableware as claimed in claim 9 is characterized in that, the backward leaning vane shape portion of the 1st centrifuge blade is connected with the circular shape of omiting curve with forward curved vane shape portion.

11. cleaning and drying machine for tableware as claimed in claim 10, it is characterized in that, be provided among some the 2nd centrifuge blades between the 1st centrifuge blade, be positioned at the inlet angle of the 2nd forward position and relative centrifuge blade at preset rotating direction, greater than the inlet angle of other the 2nd centrifuge blade with the 1st centrifuge blade.

12. as each described cleaning and drying machine for tableware in the claim 9 to 11, it is characterized in that, be provided among some the 2nd centrifuge blades between the 1st centrifuge blade, be positioned at the internal diameter that leans on afterwards the position and relative with the 1st centrifuge blade the 2nd centrifuge blade at preset rotating direction, greater than the internal diameter of other the 2nd centrifuge blade.

13. as each described cleaning and drying machine for tableware in the claim 9 to 12, it is characterized in that, the 1st centrifuge blade with in the distance between the blade of the 1st centrifuge blade front and 2nd centrifuge blade relative on the preset rotating direction with the 1st centrifuge blade, greater than the distance between the 2nd centrifuge blade or greater than the 2nd centrifuge blade with the blade pitgh between the 2nd centrifuge blade front and 1st centrifuge blade relative on the preset rotating direction with the 2nd centrifuge blade from.

14. a cleaning and drying machine for tableware is characterized in that, has the washer jet of the jet of accommodating the rinse bath that is cleaned thing, band jet cleaning water, by the scavenging pump of electric motor driven impeller to the rinse water pressurization; On above-mentioned impeller, be provided with a plurality of inboard blades in the inside portion with respect to pivot, be provided with a plurality of outsides blade in the outside portion with respect to pivot.

15. cleaning and drying machine for tableware as claimed in claim 14, it is characterized in that, the shape of inboard blade is with respect to the preset rotating direction of the impeller shape backwards towards rear-inclined, the shape of outside blade is in order to make fluid flow out to periphery easily, in the outermost perimembranous of impeller, have with respect to the preset rotating direction of the impeller part of bending shape forward.

16., it is characterized in that the number of blade of outside blade is more than the number of blade of inboard blade as claim 14 or 15 described cleaning and drying machine for tableware.

17. as each described cleaning and drying machine for tableware in the claim 14 to 16, it is characterized in that, outside blade is made of big outside blade and little outside blade, little outside blade protrudes in the low of the aspect ratio big outside blade of impeller surface and inboard blade, the distance of scavenging pump housing inner face of adorning impeller in the blade pitch of the little outside big than big outside blade and inboard blade, and little outside blade is provided in the interlobate space, the big outside on the extended line in inboard interlobate space.

18. as each described cleaning and drying machine for tableware in the claim 14 to 17, it is characterized in that, have the positive and negative rotational mechanism of motor, be provided with control device, this control device is selected the impeller direction of rotation of scavenging pump, at each inter process of matting, switches the power of the injection pressure of washer jet, perhaps at each in-process, alternately change is sprayed and is pressed.

19. as each described cleaning and drying machine for tableware in the claim 14 to 18, it is characterized in that, be provided with control device, when rinse water in the matting when predetermined temperature is following, this control device drives the impeller of scavenging pump towards the direction of rotation opposite with the regulation direction of rotation.

20. as each described cleaning and drying machine for tableware in the claim 14 to 19, it is characterized in that, have rinse water is discharged the outer draining pump of machine, be provided with control device, this control device drives the impeller of flushing water pump concurrently towards opposite direction of rotation with the running of draining pump in drainage procedure.

21. a cleaning and drying machine for tableware is characterized in that, have the jet of accommodating the rinse bath that is cleaned thing, band jet cleaning water washer jet, separate the filter of dirt in cleaning, to the scavenging pump of rinse water pressurization; Scavenging pump is being configured in slightly on the concentric circles greater than the 2nd centrifuge blade of the 1st centrifuge blade by electric motor driven the 1st centrifuge blade and external diameter, and these centrifuge blades of dress and with the housing of suction inlet and outlet in having, on the 1st centrifuge blade position relative, be provided with the magnetic of each torque of transmission with the 2nd centrifuge blade.

22. cleaning and drying machine for tableware as claimed in claim 21 is characterized in that, the blade shape of the 2nd centrifuge blade is that exit angle is set at the above straight line of about 90 degree or omits the forward curved vane shape of curve.

23. cleaning and drying machine for tableware as claimed in claim 22 is characterized in that, the blade shape of the 1st centrifuge blade is that the inside portion has the backward leaning vane shape that is set at following straight line of about 90 degree or summary curve with respect to predetermined direction of rotation exit angle.

24., it is characterized in that the blade height of the 2nd centrifuge blade is higher than the blade height of the 1st centrifuge blade as each described cleaning and drying machine for tableware in the claim 21 to 23.

25., it is characterized in that the difference in size of the internal diameter of the external diameter of the 1st centrifuge blade and the 2nd centrifuge blade is set at more than the maximum gauge of the dirt by filter as each described cleaning and drying machine for tableware in the claim 21 to 24.

26., it is characterized in that the number of blade of the 2nd centrifuge blade is more than the number of blade of the 1st centrifuge blade as each described cleaning and drying machine for tableware in the claim 21 to 25.

27. as each described cleaning and drying machine for tableware in the claim 21 to 26, it is characterized in that, during the rinse water pressurization, if the torque that the 1st centrifuge blade 1 rotates required motor is T1, during air pressurized, if the torque that the 2nd centrifuge blade 2 rotates required motor is T2, the imbalance torque of establishing between magnetic is T3, then is set at T1＞T3＞T2.

28. cleaning and drying machine for tableware, it is characterized in that, have the scavenging pump of accommodating the rinse bath that is cleaned thing, the wiper mechanism of being with the jet of jet cleaning water, pressurization rinse water, the control device of control scavenging pump rotation, above-mentioned scavenging pump has the mixed phase impeller, this mixed phase impeller has the backward leaning vane that is positioned at perimembranous and the forward curved vane that is positioned at peripheral part, and above-mentioned control device makes in the speed ratio matting of the scavenging pump in the drying process fast.

29. cleaning and drying machine for tableware, it is characterized in that, have the scavenging pump of accommodating the rinse bath that is cleaned thing, the wiper mechanism of being with the jet of jet cleaning water, pressurization rinse water, the draining pump of discharging rinse water, above-mentioned draining pump has the mixed phase impeller, and this mixed phase impeller has the backward leaning vane that is positioned at perimembranous, the forward curved vane that is positioned at peripheral part.

30. cleaning and drying machine for tableware, it is characterized in that, have and accommodate the rinse bath that is cleaned thing, the wiper mechanism of being with the jet of jet cleaning water, the scavenging pump of pressurization rinse water, the dry drying air blast of supply with air, above-mentioned drying has the mixed phase impeller with air blast, and this mixed phase impeller has the backward leaning vane that is positioned at perimembranous, the forward curved vane that is positioned at peripheral part.