CN2044358U - Humidity controller for piano - Google Patents

Abstract

The utility model discloses a piano maintenance pressure device, in particular to a controller for humidity of piano, comprising an evaporator, a hair hygrometer and an electric heating rod. The utility model is provided with a control circuit, when the power source is connected, the rotation of the pointers of a humidity meter can sent out moistening or dehumidificating signals, and the controller for humidity of piano can automatically carry out dehumidification or humidification. When the pointers move to prescribed range, all regain original states. The controller can automatically and accurately control humidity with less energy consumption and noiselessness in certain scope. The utility model has the advantages of simple structure, low cost and high reliability.

Description

Humidity controller for piano

The utility model relates to a kind of piano care device, particularly piano humidity controller.

The humidity of general piano environment of living in, can not be low excessively, can not be too high, humidity is crossed low then the wooden of piano and might be ftractureed, come unglued easily in wooden gummed place, in case musical instrument has had the slit will influence sound quality, simultaneously, paint film is also easily dry and cracked and influence attractive in appearance.If humidity is excessive, key can expand because of the moisture absorption, cause key resilience difficulty and influence is played the musical instrument, thing such as the felt moldy metamorphism that also makes moist easily in the qin, damage by worms, especially hardware such as string also gets rusty easily, piano influences tonequality, so must keep suitable humidity; The method of Shi Yonging was when environment is too dry in the past, place water tumbler in qin, environment is crossed when wetting, and places hygroscopic agent such as silica gel with the moisture absorption in qin, but these methods, be difficult to grasp appropriateness, and adopt the silica gel moisture absorption, because of its moisture absorption limited, necessary running check, also need after the moisture absorption with the electric furnace oven dry, so very inconvenient, maintenance brings very big difficulty to piano.

The purpose of this utility model is that a kind of piano humidity controller will be provided, as long as energized, it just can control the interior humidity of piano accurately and effectively automatically, makes it often remain on allowed band with interior and do not need manually-operated.

The purpose of this utility model is achieved in that by evaporator, hair hygrometer and electrical bar are formed the piano humidity controller, be placed in the qin, energized, control circuit is housed in hair hygrometer and evaporator and detects signal by hair hygrometer, when humidity touches the bottom in the qin, the automatic transpiring moisture of evaporator then, then electrical bar heats up automatically when humidity peaks in the qin, in case return in the specialized range and work as humidity, all stop automatically again, thereby reach the purpose of automatic controlled humidity.

The concrete structure of utility model is provided by following examples and accompanying drawing thereof:

Fig. 1: piano humidity controller overall scheme.

Fig. 2: the hair hygrometer master looks synoptic diagram.

Fig. 3: A-A diagrammatic cross-section.

Fig. 4: B-B diagrammatic cross-section.

Fig. 5: evaporator diagrammatic cross-section.

Fig. 6: C-C diagrammatic cross-section.

Fig. 7: electrical bar diagrammatic cross-section.

Fig. 8: control circuit principle schematic.

Describe in detail according to concrete device details and the working condition that the utility model proposes below in conjunction with Fig. 1-8.

With reference to Fig. 1, this device is by evaporator 1, and hair hygrometer 2 and electrical bar 3 constitute, and lead 18 is the power lead of complete unit, introduce evaporator 1 from socket, be connected with hair hygrometer 2 and electrical bar 3 with lead by evaporator 1 again.

With reference to Fig. 2,3,4, signal detector and control circuit are housed in hair hygrometer 2, its device is to be stained with plastic opaque shadow shield 5 on hygrometer pointer 4, on dial plate 6, the highest and the minimum humidity place that piano allows, promptly at the upper limit 75% and lower limit 35% place, corresponding with shadow shield on the pointer 5, a pair of infrared photocell 7 all is housed, 8, wherein photoelectric tube 7 is bonded at the dial plate bottom surface, photoelectric tube 8 corresponding with it is positioned at the top of photoelectric tube 7 and aligns mutually, the lead-in wire of photoelectric tube 8 passes insulating sleeve 9 and enters below the dial plate, and pour into epoxy resin in sleeve pipe 9, make lead-in wire fixing, can not rotate.In addition, on dial plate 6,10,11,12 3 light emitting diodes are installed, itself and control circuit are connected, order shows yellow, red, green three kinds of colors, and just at moisture releasing, drying and power connection, its installation method is identical with the method for installation infrared photocell 7 in expression respectively, just its end face is stretched out dial plate, in the hope of attractive in appearance.After treating that these transistors install, can be in proper order with dial plate trim ring 14, watch crystal 15 and outer press ring 16 install.Then be bonded at the back side of dial plate 6 in advance as for other on-off element, part is welded on the printed panel, is fixed on the bottom of watchcase 13.All control circuit leads are drawn from a side fairlead 17 usefulness multicore sheath pipelines of watchcase 13 in the hygrometer.

With reference to Fig. 5,6, evaporator 1 by for water pot 21, water-stop sheet 22, the shell 23 of evaporation water, pass water-stop sheet 22 and the hollow leading screw 24 that can rise or descend, be installed in lead screw gear and control circuit on the water-stop sheet 22, and the diversion that is full of hollow leading screw inside and cover top portion is evaporated filler 25 and is constituted.Evaporator connects external power source, hygrometer and electrical bar with lead.Wherein lead screw gear and control circuit are by transformer and appliance controling element 26, drive the move up and down limit switch 29 of scope of motor 27 that the hollow leading screw moves up and down and mechanical reduction gear 28 and restriction leading screw and constituted.Evaporator 1 is received by behind the detected signal of hygrometer, motor 27 rotates, slow down through mechanical reduction gear 28, drive wheel 31 rotations that are enclosed within the hollow leading screw outside by belt 30, because wheel 31 is to be fixed on the water-stop sheet 22 with the ball bearing (not shown), even, or make it sink in the water pot 21 or rise to more than the water surface so the hollow leading screw of forward and reverse rotation of wheel 31 moves up and down.When hollow leading screw rises or drops to the precalculated position, touch the limit switch 29 be contained on the support of next door with circuit interruption because of being fixed on cross bar on the leading screw, motion stops automatically, at this moment or submerged or left the water surface hollow leading screw, with regard to transfixion, wait for signal next time.Too high when extraneous humidity, when the hygrometer pointer forwarded the highest point that allows humidity to, by control element, the circuit that leads to electrical bar was connected automatically, and electrical bar heats up, and humidity descends, and cursor backward, circuit interrupt again automatically.In hollow leading screw immerses jar in the water time, owing to fill up diversion evaporation filler in the leading screw, be cotton, fiber article etc., pass through capillarity, moisture rises to cover top portion, and in the cover top portion cellulosic evaporator outer cover 32, also be full of diversion evaporation filler, must also be full of by moisture, because the cover top portion area is bigger, just easier evaporation of moisture.Snap ring 33 is stuck in evaporator outer cover 32 on the shell 23 again.

With reference to Fig. 7, electrical bar 3 is by heating 41, and as heating wire, electric heating piece, electrothermal tube 42 and end cap 44 that insulation film 43 is posted in the inboard constitute.The electrothermal tube lead feeds and draws from an end end cap of electrical bar with plastics or rubber conductor 45; and link to each other with evaporator 1; in the online holder 46 of lead two ends frame in the electrothermal tube 42; extension line in the electrothermal tube is protected by the asbestos braided sleeving 47 of partiting thermal insulation in pipe; when electrothermal tube heats up, control its surface moisture less than 70 ℃.For ease of processing, electric heating inlead 48 and inner lead and extension line welding in the pipe.

With reference to Fig. 6,8, control circuit mid-infrared light fulgurite Ha, Hb, NPN triode T1, T2, T3, resistance R 1～R5, yellow light-emitting diode 10, relay J 1, J2, microswitch K1, K2 constitutes the moisture releasing control circuit, infrared photocell HA, HB, resistance R 6～R8, red light emitting diodes 11, NPN triode T4, relay J 3 constitutes heating control circuit, top is contained in the hygrometer, the bottom is contained on the water-stop sheet of evaporator, transformer becomes 6V voltage with external 220V power supply and powers in hygrometer, green LED 12 luminous demonstration energized, when the hygrometer pointer is between bound, shadow shield is not had an effect on the pointer, the next photoelectric tube Ha, the Hb conducting, T1 ends, the T3 conducting, relay J 2 adhesives, motor 27 rotates, and drives hollow leading screw and rises, when leading screw walks to limit switch K2, circuit interruption, J2 disconnects, and motor 27 stops operating, hollow leading screw leaving water face, when the humidity reduction, the hygrometer pointer rotates to lower limit, and shadow shield blocks Ha, during the Hb photoelectric tube, the T1 conducting, yellow light-emitting diode 10 is luminous, and T2 is a noble potential, conducting, make the J1 adhesive, motor 27 antiports are delivered to hollow leading screw in the water, when touching limit switch K1, motion stops, J1 discharges, circuit interruption, leading screw stop motion, bubble is in water pot, carry out the diversion moisture releasing, in case humidity strengthens needle deflection, Ha, Hb conducting, hollow leading screw can be risen automatically again and be left the water surface.

When humidity reaches the maximal value of permission, promptly to go up in limited time, the hygrometer pointer covers HA, HB, at this moment T4 is a noble potential, conducting, and red light emitting diodes 11 is luminous, the J3 adhesive, the electrical bar conducting heats up, when humidity reduces gradually, pointer circles round, HA, HB conducting, the T4 base stage is an electronegative potential, T4 ends, J3 discharges, and intensification stops.Diode D1, D2, D3 are set for improving relay adhesive condition.

The utlity model has following advantage:

1, automatic controlled humidity promptly and accurately: owing to adopt hair hygrograph, suitably improved, add photoelectric tube, the devices such as control circuit, so moisture measurement is accurate, highly sensitive, timely humidification, can in time dehumidify again, fully automatically carry out, humidity is controlled in the prescribed limit.

2, use aspect, very clear, use yellow red green three kinds of color LEDs display operation situations, very clear, also can mutually check with the hygrometer pointer.

3, power consumption is few, and noiselessness is because of being photoelectric tube and the effective small amount of electrical energy of light-emitting diodes at ordinary times; The lifting seldom of hollow leading screw is not even lifting has loud noise yet.

4, simple in structure, cost is low, and is solid and reliable, because of only with general appliance controling element, general control circuit, so simple in structure, cost is low, low cost, the mechanical part simple structure is difficult for breaking down.

Claims (4)

1, a kind of piano care device, particularly piano humidity controller are made up of evaporator, hair hygrometer and electrical bar, it is characterized in that:

(1), evaporator by water pot, water-stop sheet, shell, the diversion evaporation filler that passes hollow leading screw that water-stop sheet can rise or descend, be installed in hollow lead screw gear and the control circuit on the water-stop sheet and be full of hollow leading screw inside and cover top portion constituted, with lead connection external power source, hygrometer and electrical bar;

(2) signal detector and control circuit are housed in the hair hygrometer:

(3) electrical bar is made up of electrothermal tube, the insulation film, heating, the end cap that are attached on the electrothermal tube inwall, and with the inline heating of lead, connects evaporator outward.

2 piano humidity controllers according to claim 1, the signal detector that it is characterized in that being contained on the hair hygrometer is to be stained with the plastics shadow shield on hygroscopic pointer, corresponding with it, the highest and the minimum humidity place that piano is allowed on dial plate, each installs a pair of infrared photocell, when pointer forwards the critical point of humidity to, then send unlike signal because of the effect of shadow shield, current path is changed.

3 according to claim 1 described piano humidity controller, it is characterized in that being installed in hollow lead screw gear and control circuit on the evaporator water-stop sheet, constituted by the limit switch that motor, mechanical reduction gear, wheel and restriction hollow leading screw that transformer, appliance controling element, drive hollow leading screw move up and down move.

4 piano humidity controllers according to claim 1 is characterized in that described diversion evaporation filler, are meant the article that utilize the capillarity diversion to rise, as cotton, and the fiber article.

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