CN203377165U

CN203377165U - Water flow switch for electric water heater

Info

Publication number: CN203377165U
Application number: CN201320346477.6U
Authority: CN
Inventors: 刘运柳
Original assignee: Individual
Current assignee: Guangdong Shunde Guangsheng Electrical Appliance Co Ltd
Priority date: 2013-06-05
Filing date: 2013-06-05
Publication date: 2014-01-01
Anticipated expiration: 2023-06-05

Abstract

Disclosed is a water flow switch for an electric water heater, and the water flow switch is in a structure of a water flow pushing type. The water flow switch consists of a main body, a cover plate, a sealing piece, a pushing piece, a spring or a spring piece, an installation cover plate, a microswitch, a stationary contact, a movable contact, a terminal, and a pushing pin of the microswitch. An inflow passage and an outflow passage are not directly communicated, and are separated by the cover plate. When water flows, a circuit is connected; when the water does not flow, the circuit is disconnected.

Description

The electric heater water flow switch

Technical field

The utility model relates to the electric heater water flow switch, relates generally to the water flow switch for storage-type (containing fast heating type) and quick-heating type electric water heater (containing little kitchen treasured and electric hot water tap).

Background technology

Existing differential hydraulic pressure switch, be mainly used on gas heater or burnt gas wall hanging furnace, and generally only have a mouth of a river, or, on the through type water channel, hydraulic pressure switch is contained on the sidewall of water pipe, be also a mouth of a river; This constitution water flow a small amount of, pressure are difficult for starting when low, simultaneously, are only applicable to the product that electric current is very little, so on electric heater, not employing so far.

Summary of the invention

The utility model provides a kind of water flow switch, and this water flow switch is current driving structure; Pushing pin 11 by main body 1, cover plate 2, seal 3, impeller 4, spring or spring leaf 5, installation cover plate 6, sensitive switch 7, fixed contact 8, moving contact 9, terminal 10, sensitive switch forms, the passage of the interior water inlet of main body 1 and water outlet is not directly to communicate, but separated by cover plate 2, when water flow is arranged, water can promote cover plate 2, promotes seal 3 with impeller 4 simultaneously and moving contact 9 is contacted with fixed contact 8, circuit turn-on; Current are closed, and circuit disconnects.

The utility model has the advantages that when water does not flow, circuit can not be connected work, automatic disconnection when water is closed; Control to circuit is that current promote mechanical type, and reliability is high, cost is low.

The accompanying drawing explanation

Fig. 1 Fig. 2 Fig. 3 is outline drawing and the structure chart of existing three kinds of hydraulic pressure switches

Fig. 4 Fig. 5 is the Water flow switch structure figure (Fig. 4 be closed condition, Fig. 5 for there be water flow make sensitive switch on-state) of current driving by the sensitive switch break-make

Fig. 6 is the microswitch structure schematic diagram

Fig. 7 Fig. 8 is the structural representation that water flow switch directly promotes contact

Embodiment

In accompanying drawing, the main body 1 of water flow switch, cover plate 2, seal 3, impeller 4, spring or spring leaf 5, installation cover plate 6, sensitive switch 7, fixed contact 8, moving contact 9, terminal 10, the pushing pin 11 of sensitive switch, the mouth of a river 12.

Fig. 1 is a kind of hydraulic pressure switch shown in publication number CN201717191U, and shown in Fig. 2 number of being 201020163554,0, for the hydraulic pressure switch of gas heater, Fig. 3 is a kind of pressure reduction induction type hydraulic pressure switch of downloading on computer; Described hydraulic pressure switch, generally only have an outlet pass, is used for the pressure of perception water, and outlet pass is contained on the sidewall of water stream channel, when the pressure of water reaches set point, could promote circuit and connect, not reach setting pressure, circuit can not be connected, and when flow is little, pressure is when low, can not start.This several prods all can not directly be controlled the electrothermal tube of electric heater, therefore do not use the electric heater product of hydraulic pressure switch at present.

Fig. 4 to Fig. 8 is the water flow switch of a kind of current driving provided by the utility model, by main body 1, cover plate 2, seal 3, impeller 4, spring or spring leaf 5, installation cover plate 6, sensitive switch 7, fixed contact 8, moving contact 9, terminal 10, formed, what Fig. 4 Fig. 5 adopted is the sensitive switch that several contacts and terminal all are fitted together, Fig. 7 Fig. 8 is directly built in installing on cover plate 6 by contact and terminal, the two function is identical with use, all can be general; Fig. 4 Fig. 7 Fig. 8 is the water route closed condition, and circuit disconnects; Fig. 5 be water in flow regime, by the strength of water, force cover plate 2 to move, seal 3, impeller 4, the pushing pin 11 that promotes on sensitive switch also move in the same way simultaneously, make moving contact and fixed contact combination, circuit turn-on; If close water route, circuit disconnects; The shape difference of Fig. 8 cover plate 2, have a plurality of holes on cover plate 2, while discharging water, promote to move on cover plate 2, and water flows from hole, and Fig. 7 Fig. 8 function is identical, can be general; On main body 1, inlet channel and water outlet water channel do not lead directly to, and must turn over a bend, and making cover plate 2 move water could circulate mutually; While closing due to water channel, cover plate 2 is closed the feed water inlet of main body 1 automatically, while guaranteeing that the municipal systems pipeline is cut off the water, also guarantees that the water in Water tank for electrical water heater can not flow out automatically, makes electric heater the dry combustion method phenomenon occur never; Fixed contact and moving contact in Fig. 7 Fig. 8, only illustrate one group in figure, actually in product can make many groups; Also can be at the another side of moving contact 9 configuration fixed contact 8, anhydrous when mobile, Ye You mono-tunnel is on-state; Arrow is water (flow) direction.

Fig. 1 to Fig. 3 and Fig. 4 to Fig. 8 are contrasted, and hydraulic pressure switch is different from the water flow switch operation principle; The water stream channel of hydraulic pressure switch is through type, carried out the pressure of the water that perception flows through by outlet pass, and the water stream channel of water flow switch is clean cut system, intake tunnel and exhalant canal directly do not communicate, but separated by cover plate 2, when water flow, by mobile water, force to back down cover plate 2, back down correlated parts simultaneously.

Claims

1. electric heater water flow switch, it is characterized in that: water flow switch is current driving structure, pushing pin (11) by main body (1), cover plate (2), seal (3), impeller (4), spring or spring leaf (5), installation cover plate (6), sensitive switch (7), fixed contact (8), moving contact (9), terminal (10), sensitive switch forms, the water inlet of main body (1) and the passage of water outlet directly do not communicate, but are separated by cover plate (2); When water flow is arranged, water can promote cover plate (2), promotes seal (3) with impeller (4) simultaneously and moving contact (9) is contacted with fixed contact (8), circuit turn-on; When current are closed, circuit disconnects.

2. electric heater water flow switch according to claim 1, it is characterized in that: when water channel is closed, cover plate (2) is closed the feed water inlet of main body (1) automatically.