CN202277503U - Novel medical moxibustion device - Google Patents

Abstract

The utility model discloses a novel medical moxibustion device constituted by a multifunctional air filter (1), a stainless steel ventilation main pipe (2), a stainless steel ventilation branch pipe (3), an air quantity regulator (4), a polypropylene ripple flexible pipe (5), a moxibustion tank (5), and a moxa stick (7). An air outlet port of an upper part of the moxibustion tank (5), in which is inserted the moxa stick (7), is connected with one end of the polypropylene ripple flexible pipe (5). The other end of the polypropylene ripple flexible pipe (5) is connected with an inlet end of the air quantity regulator (4). An outlet end of the air quantity regulator (4) is connected with the stainless steel ventilation branch pipe (3), and the other end of the stainless steel ventilation branch pipe (3) is connected with the stainless steel ventilation main pipe (2). One end of the stainless steel ventilation main pipe (2) is connected with the multifunctional air filter (1). The novel medical moxibustion device can not be used for the moxibustion treatment of patients, and can be used to prevent patients from being disturbed and harmed by the smog of moxibustion. The patients can obtain the moxibustion treatment in a clean and pollutionless environment. The novel medical moxibustion device is suitable for moxibustion treatment places such as hospitals and healthcare stations.

Description

New medical moxa-moxibustion device

Technical field

This utility model relates to a kind of new medical moxa-moxibustion device, belongs to health care moxa-moxibustion device technical field.

Background technology

Moxa-moxibustion is to be equipped with Folium Artemisiae Argyi or Folium Artemisiae Argyi to burn temperature on the acupuncture point that other drug is placed on human body surface and press; Borrow the temperature of moxibustion fire and the effect of heating power and medicine,, play warm venting QI-blood through the conduction of meridians; Strengthening vital QI to eliminate pathogenic factors reaches a kind of traditional therapy of treating disease and prevention and health care.The mechanism of action of moxa-moxibustion at first is the warm stimulation of local fire, strengthens blood circulation and lymph circulation; Strengthen metabolic capacity, promote inflammation, hematoma, adhesion etc. to dissipate and absorb, reduce neural irritability; The effect of performance sedation and analgesia can also promote the absorption of medicine; Next has the meridians regulating action, promotes human five internal organs's six internal organs, extremity bones of the body collectively to set up the relation of coordinating each other; The 3rd has the effect of regulating immunologic function, and this effect has the characteristic of two-ways regulation, and promptly low person can make it to raise, and high person can make it to reduce, and maintains in the reasonable range; The 4th moxa-moxibustion itself has pharmacological action, and moxa roll is to process as raw material with medicine, puts down in writing in the Li Shizhen (1518-1593 A.D.) Compendium of Material Medica: " Ai Yiye is used as medicine, warm in nature, bitter in the mouth, nontoxic, control all kinds of diseases and ailments, the property of exhausted sun is led to 12 warps." so there is the people to claim that Folium Artemisiae Argyi is " doctor's grass "." Bencao Congxin " said: " the Folium Artemisiae Argyi toil is given birth to warm ripe heat, and the property of pure sun being returned the exhausted YANG-depletion that hangs down, and logical 12 warps are walked three the moon, the blood of regulating the flow of vital energy, by cold-damp, all blood is ended in warm uterus, the warming middle-JIAO dissipating depression of QI, regulating menstruation is antiabortive ... with Chinese mugwort fire, can pass through at warp except that all kinds of diseases and ailments." last moxibustion acting is a kind of comprehensive effect in human body, influences each other, replenishes each other, brings into play jointly the wholistic therapy effect by various factors.Control under the guidance of thought in traditional Chinese medical science organic conception and dialectical opinion, carry out choose reasonable, apply in a flexible way, can obtain maximum usefulness.

Traditional moxa-moxibustion moxibustion therapy has moxa stick moxibustion, moxibustion with moxa cone, warming needle moxibustion etc.Wherein the mild-warm moxibustion that hanged in the moxa stick moxibustion is easy to get and is widely used because of easy economy, easy operation, material.As shown in Figure 1, having hanged mild-warm moxibustion is with the end points combustion of moxa roll (comprising pure moxa roll or medicinal moxa roll), aims at the acupuncture points on the human body or the affected part of desiring moxibustion, and fire-cure in about 20 ~ 30 ㎜ places apart from skin, with warm, the no causalgia of sensation moxibustion place, comfortable degree of being.Every cave moxibustion 10 ~ 15 minutes, moxibustion to skin produces till the blush, also can regulate moxibustion time and distance at any time according to patient's body situation, age, obtains ideal curative effect.But there are two problems in moxa stick moxibustion, the one, and the moxa stick moxibustion burning can produce smog, contain tar ingredients in the smog, and tar itself contains a large amount of carcinogenic harmful substances; Have dust and a large amount of ultra-fine suspended particulates in the smog less than 2.5 microns greater than 5 microns; Also have multiple harmful substances such as nitrogen oxide, carbon monoxide, carbon dioxide, sulfur dioxide; Particularly ultra-fine suspended particulates; Can surmount the cilium of vibrissa and pulmonary's upper respiratory tract and be deep into alveolar, even flow in the blood capillary of alveolar, flow through whole body everywhere through blood circulation again.

In the special environment of Chinese medicine acupuncture, often be several doctors to the different patients moxibustion, and in an endless stream; The smog that this place produces obviously increases; The work room air of making receives severe contamination, and iff is outdoor with its discharge, also can pollute external environment condition.How to guarantee the curative effect of moxa-moxibustion, and can alleviate so that eliminate smog to the harm of human body with to prevent to pollute surrounding enviroment are problems extremely to be solved.

Summary of the invention

The purpose of this utility model is, for the harm to people of special environment's moxibustion smog of preventing Chinese medicine acupuncture, can give patient's moxibustion safely again simultaneously, and this utility model discloses a kind of new medical moxa-moxibustion device.

The technical scheme of this utility model is; The medical moxa-moxibustion device of this utility model is made up of multi-functional air filter 1, the rustless steel ventilation person in charge 2, rustless steel branch vent 3, volume damper 4, polypropylene corrugated flexible hose 5, moxa-moxibustion jar 6, moxa roll 7; The gas outlet, moxa-moxibustion jar 6 top that is inserted with Moxibustion strip 7 connects polypropylene corrugated flexible hose 5 one ends; Polypropylene corrugated flexible hose 5 other ends are given a dinner for a visitor from afar in the adjustable valve 4 one end imports; Volume damper 4 outlet termination rustless steel branch vents 3, another termination rustless steel ventilation trunk line 2 of rustless steel branch vent 3, rustless steel ventilate and are responsible for 2 one termination multi-functional air filters 1.

Moxa-moxibustion jar 6 is critical components of the medical moxa-moxibustion device of this utility model, and moxa-moxibustion jar 6 is made up of teflin ring 8, hold-down nut 9, tank body 10, heat reflection cover 11, moxa-moxibustion clamper 12, stainless steel cloth 13, adjusting nut 14, little compression spring 15, steel ball 16, clip 17, connecting ring 18, retainer ring 19, thermal insulation layer 20.Tank body 10 tops have the gas outlet, link to each other with polypropylene corrugated flexible hose 5 through retainer ring 19; Stainless steel cloth 13 is equipped with in bottom, tank body 10 lower ends; Moxibustion strip 7 ashes can block unlikely skin ambustion when falling down; Tank body 10 bottoms have an oval-shaped air inlet near stainless steel cloth 13 upper limbs on the tank wall of gas outlet direction, it has moxa roll burning oxygen supply concurrently and regularly pours out the ashes function.Moxa-moxibustion clamper 12 is formed by three gripper jaws and a cylinder spot welding, and its cylinder size is decided according to the diameter of moxa roll 7, and the moxa roll clamper that the moxa roll of employing different-diameter only need be changed different size gets final product.Moxa-moxibustion clamper 12 is fixed on the tank body 10 by hold-down nut 9, and teflin ring 8 is housed on the moxa-moxibustion clamper 12, prevents the smog effusion; The heat reflection cover 11 that rustless steel is processed is installed on the moxa roll clamper 12, can the moxa roll heat more be concentrated the acupuncture point of investing moxibustion.

The moxa-moxibustion jar should guarantee that in design the smog that the moxa roll burning produces is enclosed in the jar as far as possible, discharges through gas outlet and polypropylene corrugated flexible hose again, guarantees the amount of oxygen that the moxa roll burning is necessary again; For reaching this purpose, the smoke density that utilizes heat is littler and to the characteristics that rise, the air inlet design is in the bottom of tank body than cold air; Venthole then is placed on the tank body top; The lit end of moxa roll (promptly producing the smog place) is 20 ~ 30 ㎜ apart from tank base, between air inlet, moxa roll lit end, gas outlet, forms difference in height, and hot smog rises and discharged by the gas outlet; And make the small negative pressure of generation in the tank body, overflow to avoid smog.

Air filter can connect the moxa-moxibustion jar through the rustless steel ventilation person in charge, rustless steel branch vent, polypropylene corrugated flexible hose when work; And form negative pressure in moxa-moxibustion jar exit; With the sucking-off of moxa-moxibustion smog, and in tank body, form certain negative pressure, make smog unlikely from gas outlet and pot bottom effusion.The formation of negative pressure is to make high efficiency particulate air filter air inlet 21 (being that 2 gas outlets are responsible in the rustless steel ventilation) locate to form negative pressure by drive motors drive vacuum pump, sends back to indoor from filter outlet 29 again after filtering with the flue gas pressure suction among the person in charge 2 of ventilating and through three filter courses.Because the filtering traffic of air filter is by maximum sick beds scale to be set to select, and when obsolete moxa-moxibustion jar occurs, should the volume damper on the rustless steel branch vent that be communicated with this moxa-moxibustion jar be closed; On the other hand, when causing the moxa-moxibustion temperature to reduce owing to the air filter suction air volume is excessive, can volume damper be turned down as if discovery; Accomplish and can smog be siphoned away; In tank body, there is suitable negative pressure smog can not overflow, can guarantees enough moxa-moxibustion temperature again, get a desired effect; Volume damper (4) can be regulated ventilation, and is extremely zero from maximum.

Multi-functional air filter 1 in this utility model is a recirculating air filter, is made up of pre-filtering layer 23, high efficiency filter layer 24, photocatalytic active carbon filter course 25, anion generator and anion converter 26, humidifier 27, drive motors and vacuum pump 28, blimp 30 and 22 of filter housings having air inlet 21, a gas outlet 29.Pre-filtering layer 23, high efficiency filter layer 24, photocatalytic active carbon filter course 25 place respectively the filter filtering area outer,, internal layer; Drive motors and vacuum pump 28 are near filtering area high efficiency filter layer; Air sucking-off after will filtering through filtering area; It is other that anion generator and anion converter 26 are arranged on drive motors and vacuum pump 28, and by the passage that flows to of sucking-off, humidifier 27 is positioned at gas outlet, filter lower end front end after the air filtration in the anion generator outlet.The smog that gets into filter is earlier through pre-filtering layer prefiltration, and the high efficiency filter layer carries out middle filtration, after catalyst activity charcoal filter course finally filters; Form the negative pressure sucking-off by drive motors and vacuum pump 28; Flow through anion generator and anion converter 26, the negative oxygen ion that anion generator produces is sneaked in the air that is filtered, and passes through humidifier 27 again; By humidifier 27 humidifications, discharge clean air.

Its work principle of filter is: suck the room air that is mixed with moxa-moxibustion smog from air inlet, and----the pre-filtering layer carries out prefiltration, and----filtration the high efficiency filter layer carries out----is finally filtered--------humidifier humidification----clean air discharge that the negative oxygen ion by anion generator produces is sneaked at catalyst activity charcoal filter course.

Device has the anion converter of anion generator in the multi-functional air filter, can discharge anion in a large number in the air of cleaning, becomes pure and fresh air and gets into the moxa-moxibustion chamber by the gas outlet circulation.Natural anion in the atmosphere can play the ventilatory that improves lung, improves blood circulation, enhances metabolism, the effect of enhance immunity system capability.The indoor negative ion concentration of moxa-moxibustion is remained at more than 1000/cubic centimetre, can reach the purpose that absorbs airborne " vitamin " and lung lavage.

The multi-functional air filter also is provided with humidifier 27; Humidifier 27 can independently close and open, and with 1 interlock of multi-functional air filter, only when room air is dry, does not just open; Till making air humidity increase to the people to feel comfortably cool; Humidifier can cut out separately generally speaking, need not start, in order to avoid humidity is excessive and waste electric power.The air inlet of multi-functional air filter is connected with logical interior person in charge of rustless steel, and ventilating to being responsible at rustless steel being provided with corresponding rustless steel branch vent according to acupuncture sick bed quantity, and volume damper all is equipped with in each arm stage casing; The valve adjustable extent by zero to maximum; Tail end at arm connects the polypropylene corrugated flexible hose, and its length is about 1.5 meters, and the polypropylene corrugated flexible hose has the disposable advantage of soft any direction; Can discharge fume; Being unlikely again influences the moxibustion operation, and the polypropylene corrugated flexible hose is made active the connection with the moxa-moxibustion jar, and promptly the moxa-moxibustion jar can be around 360 ° of polypropylene corrugated flexible hose rotations on the plane, gas outlet; Add that the soft any direction of polypropylene corrugated flexible hose itself is convertible, when just more helping moxa-moxibustion to the operation of Different Acupoint with different moxibustions orientation.

The beneficial effect with the prior art comparison of this utility model is, the device that this utility model adopts can not only carry out moxibustion to patient, and can let patient avoid the puzzlement and the harm of moxa-moxibustion smog, and patient can accept the moxibustion treatment in the environment of cleanliness without any pollution.

This utility model is adapted at the place use that hospital, health station etc. have acupuncture and moxibustion therapy; Be specially adapted to adopt the place of air-conditioning; Because indoor/outdoor temperature-difference is big, adopt straight-line to remove the effect that smog can reduce the air-conditioning attemperation, and this utility model adopt the air chamber internal recycle can save the energy except that smog; And after becoming fresh air, anion more can improve the room air situation, the health care that helps treating through increasing through clean air that the multi-functional air cleaner was handled.

Description of drawings

Fig. 1 has hanged the mild-warm moxibustion operation chart in the Moxibustion strip;

Fig. 2 is the medical moxa-moxibustion device of a this utility model structural representation;

Fig. 3 is moxa-moxibustion jar structure (the vertical placement) sketch map;

Fig. 4 is moxa-moxibustion jar structure (horizontal positioned) sketch map;

Fig. 5 is that moxa-moxibustion jar K is to enlarged drawing;

Fig. 6 is the multi-functional air filter structure schematic representation;

Fig. 7 is the volume damper structural representation;

Picture in picture number is: the 1st, and external multi-functional air filter; The 2nd, rustless steel ventilates and is responsible for; The 3rd, the rustless steel branch vent; The 4th, volume damper; The 5th, the polypropylene corrugated flexible hose; The 6th, the moxa-moxibustion jar; The 7th, moxa roll; The 8th, teflin ring; The 9th, hold-down nut; The 10th, tank body; The 11st, the heat reflection cover; The 12nd, the moxa-moxibustion clamper; The 13rd, stainless steel cloth; The 14th, adjusting nut; The 15th, little compression spring; The 16th, steel ball; The 17th, clip; The 18th, connecting ring; The 19th, retainer ring; The 20th, thermal insulation layer; The 21st, the high efficiency particulate air filter air inlet; The 22nd, filter housing; The 23rd, the pre-filtering layer; The 24th, the high efficiency filter layer; The 25th, the photocatalytic active carbon filter course; The 26th, anion generator and anion converter; The 27th, humidifier; The 28th, drive motors and vacuum pump; The 29th, filter outlet; The 30th, blimp; The 31st, valve body; The 32nd, spool; The 33rd, the hands handle; The 34th, sealing ring; The 35th, Handle axis; The 36th, body cap; The 37th, rubber blanket; The 38th, bolt.

The specific embodiment

The specific embodiment of this utility model such as Fig. 2 are to shown in Figure 6.

Fig. 2 is the medical moxa-moxibustion device of a this utility model structural representation; The medical moxa-moxibustion device of this utility model is made up of multi-functional air filter 1, the rustless steel ventilation person in charge 2, rustless steel branch vent 3, blast regulator 4, polypropylene corrugated flexible hose 5, moxa-moxibustion jar 6 and moxa roll 7; The gas outlet, moxa-moxibustion jar 6 top that is inserted with Moxibustion strip 7 connects polypropylene corrugated flexible hose 5 one ends; Polypropylene corrugated flexible hose 5 other ends are given a dinner for a visitor from afar in the adjustable valve 4 one end imports; Volume damper 4 outlet termination rustless steel branch vents 3, another termination rustless steel ventilation trunk line 2 of rustless steel branch vent 3, rustless steel ventilate and are responsible for 2 one termination multi-functional air filters 1.

The multi-functional air structure of filter is as shown in Figure 6 among this utility model embodiment.The multi-functional air filter is made up of pre-filtering layer 23, high efficiency filter layer 24, photocatalytic active carbon filter course 25, anion generator and anion converter 26, humidifier 27, drive motors and vacuum pump 28, blimp 30 and 22 of filter housings having an inlet, outlet.

Anion generator and anion converter 26 are housed in the multi-functional air filter, can discharge a large amount of (e at a high speed ^-); These electronics are caught the formation negative oxygen ion by airborne oxygen molecule; Negative oxygen ion can change antibacterial when combining with antibacterial structure or produce power shifts and makes bacterial death; Can also combine and sedimentation with dust in air, smog, cation etc., so the function that anion has kill bacteria, purifies air.Negative oxygen ion is sneaked in the multi-functional air cleaner through filtering clean air, and is indoor by outlet discharge circulation entering moxa-moxibustion, keeps the pure and fresh of air, and don't as for changing indoor temperature, plays the effect of energy-saving and emission-reduction.

The structure of moxa-moxibustion jar such as Fig. 3 and shown in Figure 4 in the present embodiment, Fig. 3 is the vertical structure chart of placing of moxa-moxibustion jar, Fig. 4 is the structure chart of moxa-moxibustion jar horizontal positioned.

The moxa-moxibustion jar is made up of teflin ring 8, hold-down nut 9, tank body 10, heat reflection cover 11, moxa-moxibustion clamper 12, stainless steel cloth 13, adjusting nut 14, little compression spring 15, steel ball 16, clip 17, connecting ring 18, retainer ring 19, thermal insulation layer 20.Tank body 10 is processed by rustless steel or pyrite; Tank body top has the gas outlet; Retainer ring 19 is mounted thereto, in bottom, tank body lower end stainless steel cloth 13 is housed, and can block unlikely skin ambustion when the Moxibustion strip ashes fall down; Direction has an oval-shaped air inlet over against the gas outlet near stainless steel cloth 13 upper limbs; It has moxa roll burning oxygen supply concurrently and regularly pours out the ashes function, is designed to the difference in height that oval-shaped intention is to increase air inlet and moxa-moxibustion lit end as far as possible, but keeps air inflow and conveniently pour out ashes.Moxa-moxibustion clamper 12 usefulness rustless steels or pyrite are processed, and are formed by three gripper jaws and a cylinder spot welding, and its size is decided according to moxa roll 7 diameters, and the moxa roll clamper that the moxa roll of employing different-diameter only need be changed different size gets final product.The moxa roll diameter is a bit larger tham in drum diameter; To make things convenient for moxa roll to insert, gripper jaw can grasp moxa roll stably then less than the moxa roll diameter; But when the moxa roll burning shortens; Outer a little force urges moxa roll can return to original position (promptly apart from tank base 20 ㎜ ~ 30 ㎜) with moxa roll, like this as long as the distance of control moxa-moxibustion jar and skin, promptly may command moxa roll lit end apart from the distance of skin to meet the moxibustion needs.Teflin ring 8 is installed on the moxa roll clamper; Can prevent that smog is from slit effusion between moxa roll and the moxa roll clamper cylinder; Moxa roll clamper 12 dependence fixedly spiral shell 9 are fixed on the tank body 10, can be for convenience detach, regularly clean on it and a jar intravital spot; The heat reflection cover 11 that rustless steel is processed also is housed on moxa roll clamper 12, can the moxa roll heat be more concentrated the acupuncture point of investing moxibustion.

Be covered with the thermal insulation layer 20 of hollow in the outer rim of tank body 10, process the burning sensation when alleviating moxibustion with heat-barrier material.

When moxibustion; When if moxa roll 7 need be in vertical position; Moxa-moxibustion jar 6 should be in position shown in Figure 3; Then cold air is got into by the air inlet (K is to indication among the figure) of tank body 10, the smog that moxa roll 7 burnings produce by shown in Fig. 3 along the direction of arrow to rising, discharge through corrugated flexible hose by the gas outlet of tank body 10 again.When if moxa roll 5 need be horizontal; Position directly over then should tank body 10 gas outlets being in, as shown in Figure 4, horizontal departure preferably is not more than 30 °; Making between the air inlet, moxa roll, gas outlet of tank body 10 has certain height poor, and smog also can successfully be discharged through corrugated flexible hose from the gas outlet.So during moxibustion, the vapour discharge effect is more satisfactory on above two kinds of positions for this utility model.General passing through changes position, can both accomplish the moxibustion at each acupuncture point of health basically with above two kinds of positions, even because other reasons can not change position; Can only be on other positions during moxibustion; Only need avoid air inlet position vertically downward, because the suction that the corrugated flexible hose difference in height produces also can be discharged most of smog; Have only low smoke to overflow, reduce of the influence of moxa-moxibustion smog as much as possible human body.

Claims (6)

1. new medical moxa-moxibustion device; It is characterized in that said moxa-moxibustion device is made up of multi-functional air filter (1), the rustless steel ventilation person in charge (2), rustless steel branch vent (3), blast regulator (4), polypropylene corrugated flexible hose (5), moxa-moxibustion jar (5), moxa roll (7); Moxa-moxibustion jar (5) gas outlet, top that is inserted with Moxibustion strip (7) connects polypropylene corrugated flexible hose (5) one ends; Polypropylene corrugated flexible hose (5) other end is given a dinner for a visitor from afar in adjustable valve (4) the one end imports; Volume damper (4) outlet termination rustless steel branch vent (3); Another termination rustless steel ventilation trunk line (2) of rustless steel branch vent (3), rustless steel ventilate and are responsible for (2) one termination multi-functional air filters (1).

2. new medical moxa-moxibustion device according to claim 1; It is characterized in that said moxa-moxibustion jar (5) is made up of teflin ring (8), hold-down nut (9), tank body (10), heat reflection cover (11), moxa-moxibustion clamper (12), stainless steel cloth (13), adjusting nut (14), little compression spring (15), steel ball (16), clip (17), connecting ring (18), retainer ring (19), thermal insulation layer (20); Tank body (10) top has the gas outlet, links to each other with polypropylene corrugated flexible hose (5) through retainer ring (19); Stainless steel cloth (13) is equipped with in bottom, tank body (10) lower end, and tank body (10) bottom has an oval-shaped air inlet near stainless steel cloth (13) upper limb on the tank wall of gas outlet direction; Moxa-moxibustion clamper (12) is formed by three gripper jaws and a cylinder spot welding, and moxa-moxibustion clamper (12) is fixed on the tank body (10) by hold-down nut (9), and the teflin ring (8) that prevents that smog from overflowing is housed on the moxa-moxibustion clamper (12); The heat reflection cover (11) that rustless steel is processed is installed on the moxa roll clamper (12).

3. new medical moxa-moxibustion device according to claim 1; It is characterized in that; Said multi-functional air filter is a recirculating air filter, is made up of pre-filtering layer (23), high efficiency filter layer (24), photocatalytic active carbon filter course (25), anion generator and anion converter (26), humidifier (27), drive motors and vacuum pump (28), blimp (30) and the filter housing that has air inlet (21), gas outlet (29); Pre-filtering layer (23), high efficiency filter layer (24), photocatalytic active carbon filter course (25) place respectively the filter filtering area outer,, internal layer; Drive motors and vacuum pump (28) are near filtering area high efficiency filter layer (25); Anion generator and anion converter (26) are arranged on drive motors and vacuum pump (28) is other; Anion generator outlet flows to passage after the air filtration, and humidifier (27) is positioned at gas outlet, filter lower end front end.

4. new medical moxa-moxibustion device according to claim 1 is characterized in that said volume damper (4) can be regulated ventilation, and is extremely zero from maximum.

5. new medical moxa-moxibustion device according to claim 1 is characterized in that said humidifier (27) can independently close and open, and with multi-functional air filter (1) interlock, only when room air is dry, does not just open.

6. new medical moxa-moxibustion device according to claim 1; It is characterized in that; The placement location of the interior moxa roll of said moxa-moxibustion jar (5) (7) be the moxa roll lit end apart from tank base 20 ~ 30 ㎜, between air inlet, moxa roll lit end, gas outlet, form difference in height, hot smog rises and is discharged by the gas outlet; And make the small negative pressure of generation in the tank body, overflow to avoid smog.

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