CN2667599Y

CN2667599Y - Fluorescent lamp working principle demonstration instrument

Info

Publication number: CN2667599Y
Application number: CN 200320105188
Authority: CN
Inventors: 徐璐
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-11-03
Filing date: 2003-11-03
Publication date: 2004-12-29
Anticipated expiration: 2013-11-03

Abstract

The utility model relates to a fluorescent lamp working principle demonstrating instrument which belongs to a physics teaching appliance. In the physics teaching of schools, when a teacher teaches a fluorescent lamp working principle in an electricity course, due to the lack of a fluorescent lamp demonstrating instrument, students feel dull and the teacher are embarrassed; because the electricity teaching is not easy to give the students enlightening education in a direct view, the students lose confidence in the following electricity courses, and the utility model provide a fluorescent lamp demonstrating instrument for the purpose. Through the operation of a starter and a ballast circuits connected in parallel on both sides of a fluorescent lamp fixed on a plate face, the utility model makes the students visually know the actions of an inductance element and the starter in the fluorescent lamp and deepen the recognition for electricity so as to enhance the student's interests. The utility model has the advantages of simple structure and convenient operation so as to be widely used for the physics teaching of secondary schools.

Description

A kind of daylight lamp principle of work demonstrator

Technical field:

The utility model relates to a kind of daylight lamp principle of work demonstrator, belongs to physics teaching utensil class.

Background technology:

The secondary school education stage, the physics course is an important class of a guiding student knowledge of natural environment, " electricity " chapter in the teaching is owing to be subjected to condition restriction, the student is difficult to obtain the education of the formula of imparting rudimentary knowledge to beginners from abstract explanation, wherein as the explanation of " daylight lamp principle of work " owing to really lack the ocular demonstration instruments used for education in the existing technology, the student listens class hour, understands just as being difficult to looking at flowers in a fog, and teacher also feels teaching inconvenience.

The utility model content:

The utility model purpose is in order to overcome above-mentioned shortcoming, and a kind of " the daylight lamp principle of work demonstrator " that provide, can make the student see intuitively in operation how daylight lamp is lighted daylight lamp by the self-induction action of starter and ballast resistor, thereby can solve the understanding of student, improve the interest of student electronics to the daylight lamp principle.

The utility model implementation:

Starter panel with wire coupling is housed above the panel that it is made up of framework, and fluorescent tube panel and ballast resistor panel also are equipped with a power supply in its framework panel side.

The branch switch K that has a starter S to connect with it above the described starter panel ₃Element after the series connection again with a switch contacts S ₁Parallel connection, back in parallel branch road two ends join with daylight lamp respectively.

The last telegraph key K that ballast resistor is housed above the described ballast resistor panel and connects with it ₁Circuit and incandescent lamp and following telegraph key K ₂Branch road behind the series circuit, two series circuit parallel connections, an end communicates with power supply, and the other end and fluorescent tube join.

Described two parallel circuits are formed two branch roads, the telegraph key K above the described ballast resistor in the upper and lower position of daylight lamp respectively ₁Reach telegraph key K down with incandescent lamp ₂The circuit of forming is connected with AC power.

The utility model principle of work:

After the energized, at first will go up telegraph key and branch switch K ₃Closure, daylight lamp is lighted; Last telegraph key K ₁Disconnect following telegraph key K ₂, when branch switch is closed, daylight lamp does not then start not luminous.Work as K ₃, K ₁After the closure, treat that daylight lamp is lighted after, again with telegraph key closure, then K ₁Disconnect daylight lamp again and work equally, if closed K ₁Disconnect K ₂, K ₃Press switch contacts S ₁Contact, when treating that the fluorescent tube two ends are rubescent, unclamp contact then daylight lamp still lighting, and operate as normal, like this can the effect of the principle of work of daylight lamp and each parts show perfectly clear, reached demonstration purpose.

The utility model compared with prior art has obvious advantage.

Because the utility model is at one above the panel, the starter and the incandescent branch circuit of fluorescent tube and these fluorescent tube both sides have been installed respectively, under the energized situation, pass through key switch, the conversion of branch switch and following telegraph key can make the student get information about inductance element, the principle of ballast resistor and starter reaches the effect in daylight lamp, thereby can improve the interest of student's learning physics electronics.

Description of drawings:

Fig. 1, the utility model structural representation.

Fig. 2, the utility model circuit theory diagrams.

Embodiment:

The utility model is provided by following examples.

Below in conjunction with accompanying drawing the utility model is described further:

By 1, power supply, 2, telegraph key down, 3, incandescent lamp, 4, ballast resistor, 5, daylight lamp, 6, switch contacts, 7, starter, 8, branch switch, 9, go up telegraph key, 10, panel, 11, ballast resistor panel 12, starter panel form.

Fig. 1 panel 10 is to manufacture with nine layers of scale board of a 900 * 750mm to form, and is fixed with starter panel 12 successively with screw above the panel, and daylight lamp 5 and ballast resistor panel 11 have a power supply 1 socket in the side of panel 10.

On the described starter panel 12, a starter is housed, and is chained together with branch switch 8, this series circuit ballast resistor is in parallel with switch contacts 6, and back in parallel circuit two terminates on the daylight lamp.

Described ballast resistor panel 11 has a ballast resistor 4 and a K ₁ Last telegraph key 9 is cascaded; Incandescent lamp 3 and K ₂Following telegraph key 2 is connected together, and then two series shunt are parallel with one another again, and back one end in parallel and power supply join, and the other end and daylight lamp 5 join.

During the demonstration daylight lamp, socket is inserted on 220 volts of AC power, disconnect K ₂Closed K ₃And K ₁Then starter 7, and S flash of light back disconnects suddenly, at this moment, produced instantaneous pressure and lighted daylight lamp by the self-induction action of suppressing stream device 4.

The demonstration ballast resistor is done the time spent, can reduce voltage in the time of providing the high pressure operate as normal when starting owing to ballast resistor 4.

Therefore disconnect K ₁Closed K ₂And K ₃The time, daylight lamp does not work, and illustrates that incandescent lamp 3 can not provide high pressure, and disconnects K ₂, closed K ₁The time, daylight lamp is then bright.

In Fig. 2, when disconnecting K ₂, closed K ₁K ₃After, daylight lamp is normal when luminous, closed K ₂Then disconnect K again ₁, can see that daylight lamp is luminous in the same old way, ballast resistor was the same with the effect of incandescent lamp 3 when operate as normal was described, was equivalent to the dropping resistor effect.

The effect of demonstration board starter:

In circuit, closed K ₁, and disconnect K ₂And K ₃Lamp does not then work, when pressing S with hand ₁The time, treat that filament is little when red, to loose one's grip suddenly, daylight lamp equally starts luminous, this explanation, switch contacts 6 is identical with the effect of starter 7, suitable snap switch effect.

Claims

1, a kind of daylight lamp principle of work demonstrator, it is characterized in that this demonstrator is the starter panel (12) that is equipped with wire coupling on a panel of being made of framework (10), fluorescent tube panel (5) and ballast resistor panel (11) are formed, and in its framework panel side one power supply (1) are arranged.

2, a kind of daylight lamp principle of work demonstrator according to claim 1; It is characterized in that: a starter (7) K that connects is with it arranged above the starter panel (12) ₃Branch switch (8), in parallel with a switch contacts (6) again after the series connection, back in parallel two ends join with daylight lamp (5) respectively; Telegraph key (9) circuit that ballast resistor (4) is housed above the described ballast resistor panel (11) and connects with it; Incandescent lamp (3) and K ₂Following telegraph key (2) series circuit, an end communicates with power supply after two series circuit parallel connections, the other end and fluorescent tube (5) join, described two parallel branches are respectively at two circuit of the upper and lower composition of daylight lamp, and ballast resistor (4) go up telegraph key (9) and incandescent lamp (3) and down telegraph key (2) composition circuit with exchange (1) power supply and be connected.