CN201757514U - Electric water heater with self-locking function in case of power-off - Google Patents

Abstract

The utility model discloses an electric water heater with a self-locking function in case of power-off. The electric water heat can keep the off state when the circuit which is off before is on again. And the normally open switch button (SB) on a self-locking socket must be switched on to make the heating module work again. In this way, the accident occurs less frequently and the electrical energy is saved. The self-locking socket in case of power-off in the utility model is innovative in that the mature relay and switch button elements are adopted; the circuit structure is innovatively designed; and the self-locking function of the electric water heat in case of power-off is achieved. The added circuit module is small in volume, simple in structure and convenient in making. Furthermore, the utility model which has a low price is easy for large-scale mass production.

Description

Electric heater cuts off self-lock

Technical field

The utility model relates to the electric heater resist technology, specifically is meant a kind of electric heater that has the function that cuts off self-lock.

Background technology

Electric heater in the market can only be realized simple water heating function mostly, more progressive scheme is: electric heater inside is provided with temperature control modules, when water is heated to the default threshold value of temperature control modules, temperature control modules cuts off heater circuit, make heater quit work, and when water temperature in the utensil was reduced to the default minimum of temperature control modules, temperature control modules was communicated with heater circuit again, makes heater rework to carry out the water heating.

When unexpected generation power outage, the attaching plug of electric heater is if still be connected in civil power, then powers suddenly when circuit, and when water temperature is lower than the default minimum of temperature control modules in the utensil, temperature control modules will be communicated with heater circuit again, makes heater rework to carry out the water heating.If under this moment on-the-spot unmanned, management and control, and don't when needing the hot water supply, the electric heater control of portion's temperature control modules within it, circulation is constantly heated-is stopped and heating this state, tend to cause accident, the especially empty generation of burning of electric heater wastes electric energy to I haven't seen you for ages.

The utility model content

Again using the harm that may cause under the no management and control state in power supply back in order to overcome above-mentioned electric heater, the utility model proposes a kind of electric heater that has the function that cuts off self-lock, when sending a telegram here again after the down circuitry, the off-position that still can keep heating module, must start often driving button (SB) and just can make the heating module work of switching on again in the self-locking socket, reduce the generation of accident with this, save electric energy.

For reaching above-mentioned purpose, the utility model adopts following technical scheme to realize: the electric heater that cuts off self-lock comprises that the module and that cuts off self-lock often drives button (SB); The described module that cuts off self-lock is provided with secondary linked switch (KM1-KM2), and when being in "on" position, can produce magnetic and make the secondary linked switch be in the AC electromagnetic coil of closure state (KM), described secondary linked switch (KM1-KM2) comprises branch switch (KM1) and branch switch (KM2); Wherein, described branch switch (KM1) series connection is controlled the break-make of live wire with this on the live wire of heater circuit power line; Described often opening formed series arm with AC electromagnetic coil (KM) after button (SB) is in parallel with branch switch (KM2), and this series arm is connected between the live wire and zero line of heater circuit power line.

The described button (SB) of often opening is not for there being lock band button switch, and moment is connected the button of automatic disconnection behind the circuit when also being a kind of the click, its by a LED light be formed in parallel with a normally opened contact switch (K) again after a current-limiting resistance is connected; When nothing lock band button switch was in "on" position, LED light was bright, and when being in off-position, LED light is gone out, and whether is not in "on" position and there is lock band button switch, has also represented external circuit whether to send a telegram here, and both "on" positions are consistent.

The described module that cuts off self-lock is preferably alternating current electromagnetic relay, this alternating current electromagnetic relay is provided with AC electromagnetic coil and a pair of interlock normally opened contact, wherein AC electromagnetic coil is as AC electromagnetic coil (KM), and described a pair of interlock normally opened contact is promptly as secondary linked switch (KM1-KM2).

The cut off self-lock operation principle of electric heater of the utility model is as follows:

1, after the outage, secondary linked switch (KM1-KM2) loses magnetism under AC electromagnetic coil (KM) spring action wherein by automatic disconnection because of AC electromagnetic coil (KM), and at this moment, heater circuit and AC electromagnetic coil (KM) all are in off state; When powering once more, AC electromagnetic coil (KM) still opens circuit, can't adhesive secondary linked switch (KM1-KM2), so secondary linked switch (KM1-KM2), comprise that branch switch (KM1) and branch switch (KM2) all are in off state, owing to branch switch (KM1) is connected on the heater circuit power line live wire, so heater circuit also opens circuit, so just can realize the auto-lock function after electric heater cuts off the power supply, thereby reach energy-conservation, purpose of safety;

2, when pressing when often driving button (SB), then AC electromagnetic coil (KM) energising produces magnetic with all adhesives of secondary linked switch (KM1-KM2); Unclamp and often drive button (SB), because (KM2) adhesive and with often to drive button (SB) in parallel, so AC electromagnetic coil (KM) is still connected work, secondary linked switch (KM1-KM2) just can not disconnect because of the disconnection of often driving button (SB); Heater circuit release this moment and energising operate as normal.

The utility model has the following advantages and beneficial effect compared to existing technology:

The utility model electric heater that cuts off self-lock, by management and control to the back heater circuit state that cuts off the power supply, eliminated the circuit descendant that powers again and do not disconnected the disaster hidden-trouble (especially empty burning accident) that is connected in electric heater and brings for carelessness, can also play the effect of saves energy, be specially adapted to regular outage area.The utility model electric heater that cuts off self-lock, structure realizes simple, and is easy to use, is easy to produce in enormous quantities, with low cost, and stronger practicality is arranged.

Description of drawings

Fig. 1 is the cut off self-lock circuit theory schematic diagram of electric heater of the utility model;

Fig. 2 is the concrete enforcement connection layout of the embodiment 1 described electric heater that cuts off self-lock.

The specific embodiment

Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.

Generally speaking, as shown in Figure 1, the utility model electric heater circuit theory that cuts off self-lock is as follows: comprise that the module and that cuts off self-lock often drives button (SB); The described module that cuts off self-lock is provided with secondary linked switch (KM1-KM2), and when being in "on" position, can produce magnetic and make the secondary linked switch be in the AC electromagnetic coil of closure state (KM), described secondary linked switch (KM1-KM2) comprises branch switch (KM1) and branch switch (KM2); Wherein, described branch switch (KM1) series connection is controlled the break-make of live wire with this on the live wire of heater circuit power line; Described often opening formed series arm with AC electromagnetic coil (KM) after button (SB) is in parallel with branch switch (KM2), and this series arm is connected between the live wire and zero line of heater circuit power line.

The described button (SB) of often opening is not for there being lock band button switch, and moment is connected the button of automatic disconnection behind the circuit when also being a kind of the click, its by a LED light be formed in parallel with a normally opened contact switch (K) again after a current-limiting resistance R connects; When nothing lock band button switch was in "on" position, LED light was bright, and when being in off-position, LED light is gone out, and whether is not in "on" position and there is lock band button switch, has also represented external circuit whether to send a telegram here, and both "on" positions are consistent.

Adopting alternating current electromagnetic relay with the described module that cuts off self-lock below is example, and the utility model electric heater that cuts off self-lock is done detailed description.

Embodiment 1

As shown in Figure 2, the present embodiment socket that cuts off self-lock comprises: one of the socket that the current-limiting resistance R of alternating current electromagnetic relay, normally opened contact switch (K), LED light, 82k Ω (1/2W) and peak power are 2200W.Wherein, do not have lock press button (SB) and LED light be in parallel after again with current-limiting resistance R composition series arm.

Described alternating current electromagnetic relay inside comprises AC electromagnetic coil and a pair of interlock normally opened contact.Its inner AC electromagnetic coil can be used as AC electromagnetic coil shown in Figure 1 (KM); A pair of interlock normally opened contact promptly works as secondary linked switch (KM1-KM2) shown in Figure 1.

The button of automatic disconnection behind moment connection circuit when described nothing lock press button (SB) is a kind of the click.Utilize light emitting diode can play the effect whether the indication external power has electricity.

Fig. 2 has also provided the concrete connection layout of the electric heater that cuts off self-lock:

The JQX-13FA/2Z type alternating current electromagnetic relay rated voltage 220V that is adopted in the present embodiment, contact maximum allowed current 10A is because of normally-closed contact not effect in the present embodiment, so cast out (not indicating among the figure).Normally opened contact (KM1) series connection of alternating current electromagnetic relay is received in the live wire of heater circuit; Receive the live wire and the zero line side of heater circuit after AC electromagnetic coil (KM) series connection of normally opened contact (KM1) and relay; LED, current-limiting resistance R and normally opened contact switch (K) do not have lock band button switch common the composition, the terminal 1 and the terminal 5 of a normally opened contact switch (K) of press button (SB) and resistance R series connection back cut-in relay, its effect is to form relation in parallel with the normally opened contact (KM2) of relay; LED can play the effect whether the indication external power has electricity.

After down circuitry, AC relay coil (KM) loses magnetism, and interlock normally opened contact (KM1-KM2) is disconnected under the effect of relay contained spring, so socket and AC relay coil (KM) all are in off state;

When powering once more, AC relay coil (KM) still opens circuit not can adhesive interlock normally opened contact (KM1-KM2), so interlock normally opened contact (KM1-KM2) still is in off state, because normally opened contact (KM1) is connected in the live wire loop of heater circuit, thereby heater circuit can not switch on, thereby realized the function that cuts off self-lock.

When powering once more, this moment is bright as the LED of indicator lamp, plays the effect that the indication external power has electricity; The people is when clicking button (SB), and AC electromagnetic coil (KM) loop is connected, and coil produces magnetic, adhesive interlock normally opened contact (KM1-KM2), this moment LED by short circuit, LED goes out.The interlock normally opened contact (KM1-KM2) of relay is in case by adhesive, and the live wire loop of socket and AC electromagnetic coil (KM) loop all are switched on, and heater circuit is in "on" position.

The cut off self-lock innovation part of heater circuit of the utility model is: relay and shift knob element that utilization is ripe, innovative design circuit structure, the function that cuts off self-lock of having accomplished electric heater; The circuit module volume that adds is little, simple in structure, easy to make, the cheap large-scale mass production that is easy to of product price.

The foregoing description is the utility model preferred implementation; but embodiment of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under spiritual essence of the present utility model and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within the protection domain of the present utility model.

Claims (3)

1. the electric heater that cuts off self-lock is characterized in that: comprise that the module and that cuts off self-lock often drives button (SB); The described module that cuts off self-lock is provided with secondary linked switch (KM1-KM2), and when being in "on" position, can produce magnetic and make the secondary linked switch be in the AC electromagnetic coil of closure state (KM), described secondary linked switch (KM1-KM2) comprises branch switch (KM1) and branch switch (KM2); Wherein, described branch switch (KM1) series connection is on the live wire of heater circuit power line; Described often opening formed series arm with AC electromagnetic coil (KM) after button (SB) is in parallel with branch switch (KM2), and this series arm is connected between the live wire and zero line of heater circuit power line.

2. electric heater according to claim 1 is characterized in that: the described button (SB) of often opening is not for there being lock band button switch, its by a LED light be formed in parallel with a normally opened contact switch (K) again after a current-limiting resistance is connected.

3. electric heater according to claim 1 and 2, it is characterized in that: the described module that cuts off self-lock is an alternating current electromagnetic relay, this alternating current electromagnetic relay is provided with AC electromagnetic coil and a pair of interlock normally opened contact, wherein AC electromagnetic coil is as AC electromagnetic coil (KM), and described a pair of interlock normally opened contact is promptly as secondary linked switch (KM1-KM2).

Images