WO2017049950A1

WO2017049950A1 - Water shortage protection device for air-conditioning fans

Info

Publication number: WO2017049950A1
Application number: PCT/CN2016/084309
Authority: WO
Inventors: 赖伴来; 庞亚鹏
Original assignee: 深圳市联创科技集团有限公司
Priority date: 2015-09-22
Filing date: 2016-06-01
Publication date: 2017-03-30
Also published as: CN205048654U

Abstract

A water shortage protection device for air-conditioning fans. The water shortage protection device (3) comprises a float (32), a transmission ejector rod (33), and an electronic switch (36). The float (32) and the transmission ejector rod (33) are mounted in a water tank (8), and the electronic switch (36) is mounted on the top cap of the water tank (8). The float (3) is inserted into a limiting groove (83) at the bottom of the water tank (8), and the groove wall of the limiting groove (83) surrounds an inlet opening (80) of the water tank (8). The external diameter of the float (32) fits the internal diameter of the limiting groove (83), and the float (32) can move only up and down but cannot move left and right in the limiting groove (83). When the water tank (8) is full of water, and the float (32) is floated to the highest position, the float (32) will not be completely detached from the limiting groove. The water shortage protection device has a simple structure, and the float has more even stress distribution and can move up and down more steadily. The electronic switch has high sensitivity, making the water shortage protection alarming performance more reliable, and effectively reducing the probability of false alarms.

Description

Air conditioning fan water shortage protection device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning apparatus that cools indoor air by evaporation of water in air, and more particularly to an air conditioning fan equipped with a water shortage protection device.

BACKGROUND OF THE INVENTION The Chinese patent "Air Conditioning Fan with Water Deficit Protection Device" (ZL 2014207493876) abandons the combined structure of the reed pipe and the float switch, and adopts a micro switch to realize water shortage protection, and the structure of the water shortage protection device is more simplified. Referring to FIG. 5, the water shortage protection device 2 of the air conditioner fan disclosed in the patent includes a float 22, a transmission ejector 24 and a micro switch 26, and the float 22 is disposed directly above the bottom water inlet hole 11 of the inner cavity of the water tank 1. One end of the transmission ram 24 is coupled to the top of the float 22, and the other end passes through the top cover 13 of the sink 1, to the drive arm of the micro switch 26 mounted on the top cover, and the micro switch 26 is mounted on the micro switch On the fixing frame 25, one end of the micro switch holder 25 is fixed on the top cover 13 of the water tank 1, and the other end is fixedly mounted with a micro switch 26, so that the driving arm of the micro switch 26 is downward, facing the top cover. An extended drive ram 24 on the 13; the microswitch 26 is electrically coupled to the control circuit; the flow of water pumped by the water inlet opening 11 of the water tank 1 exerts an upward urging force on the float at the water inlet And buoyancy, driving the transmission ram 24 to move upward to squeeze the driving arm of the micro switch 26, to the movable contact of the micro switch 26 and the static contact, the control circuit receives the electrical signal of the micro switch conduction Normal operation control of the water level, that is, control includes controlling the pump to continuously pump water and The indicator light or icon indicates that the water level of the water tank is normal; when the water inlet of the water inlet 1 of the water tank 1 is pumped or the driving force of the water flow and the buoyancy are insufficient, the float 22 and the transmission ram 24 move downward due to gravity, thereby driving the arm back. The movable contact of the micro switch 26 is disconnected from the static contact, and the control circuit receives the electric signal of the micro switch disconnecting and then gives the operation control of the abnormal water level, that is, disconnects the power supply of the water pump and stops the water pumping of the water pump. The work indicator or icon shows the water tank shortage alarm.

In the prior art water shortage protection device, when the float floats up, it is easy to shift left and right, so that the transmission rod cannot touch the micro switch effectively, and the micro switch is rotated according to the compression piece of the transmission rod. The pressing piece pushes the movement of the triggering rod, and finally drives the inner elastic piece of the switch to move. The elastic piece moves to a certain position to break through the pre-made elastic potential energy, and finally the contact of the switch is closed, and the switch sensitivity is poor.

SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is to avoid the deficiencies of the prior art and to design and manufacture an air-conditioning fan with a water-deficient protection device, which solves the problem of insufficient sensitivity of the prior art water-deficient protection device, poor reliability, etc. problem.

The technical solution proposed by the utility model to solve the above technical problem is: a water shortage protection device for an air conditioner fan, the water shortage protection device includes a float, a transmission ejector and an electronic switch, and the float and the transmission ejector are installed at In the water tank, an electronic switch is mounted on the top cover of the water tank; the float is inserted in the limiting slot at the bottom of the water tank, and the slot wall of the limiting slot surrounds the water inlet hole of the water tank; the outer diameter and the limit of the float The inner diameter of the bit groove is matched, and the float can only move up and down in the limit groove, It can move left and right; when the sink is filled with water and the float floats to the highest position, the float will not completely disengage from the limit slot.

More preferably, the electronic switch is a contact switch, and the conductive elastic piece of the contact switch is mounted by a cantilever fixed at one end, and the movable end of the conductive elastic piece is provided with a movable contact of the contact switch; The transmission rod is directed to the movable end of the conductive elastic piece of the contact switch; when the float is floating, the transmission ejector pin up the conductive elastic piece of the contact switch, so that the static contact of the conductive elastic piece is fixed above the top cover of the water tank When the static contact of the contact switch contacts, the contact switch is turned on; when the inlet of the water tank is not pumped or the driving force of the water flow and the buoyancy are insufficient, the float and the transmission ejector move downward due to gravity, and the conductive elastic piece rebounds. The contact switch is open.

More preferably, the outer wall of the float is provided with an outwardly extending boss. When the water tank is not water, the boss is buckled at the notch of the limiting slot, and the bottom of the float does not come into surface contact with the water inlet.

More preferably, at the bottom of the limit groove, at least two upwardly protruding legs are arranged at the bottom of the water inlet. When the water tank is not watery or the water volume is insufficient to float the float, the float is placed on the legs to ensure water. Flowing smoothly from the water inlet.

Compared with the prior art, the utility model has the advantages that the structure is simple, the force of the float is more uniform, the up and down movement is more stable, the sensitivity of the electronic switch is high, the water shortage protection alarm performance is more reliable, and the probability of occurrence of false alarms is effectively reduced.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a front elevational cross-sectional view showing a front view of a water tank 8 with a water shortage protection device 3 installed in a preferred embodiment of a water shortage protection device of the present invention;

Figure 2 is a front elevational cross-sectional view showing the front view of the water tank 8 in which the water shortage protection device 3 is installed in the preferred embodiment;

Figure 3 is a schematic isometric view showing the separated state of the components of the protection device 3 and the water tank 8 installed in the preferred embodiment;

4 is a partial cross-sectional, isometric projection view of the air conditioning fan with the water shortage protection device 3 installed in the preferred embodiment;

FIG. 5 is a front elevational cross-sectional view showing the conventional water-deficient protection device 2 installed in the water tank 1.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be further described in conjunction with the preferred embodiments shown in the drawings.

Referring to Figures 1 to 4, a preferred embodiment of the present invention is a water-deficient protection device designed for an air-conditioning fan, the air-conditioning fan including a housing of an air-conditioning fan, a control circuit installed in the housing, and a fan assembly And a water circulation device comprising a water tank and a water pump located in the water tank and a water curtain for evaporating heat of the water, the water pump and the water pump in the water tank and the water tank 8 at the upper end of the water curtain, the water shortage protection device 3 The float 32, the drive jack 33 and the electronic open switch 36 are included; the float 32 and the drive jack 33 are mounted in the water tank 8, and the electronic switch is mounted on the top cover of the water tank. The float 32 is inserted into the limit slot 83 at the bottom of the water tank 8. The groove wall of the limiting groove 83 surrounds the water inlet hole 80 of the water tank 8; the float 32 The outer diameter is matched with the inner diameter of the limiting groove 83, and the float 32 can only move up and down in the limiting groove 83, and cannot move left and right; when the water tank 8 is filled with water and the float 32 floats to the highest position, the float does not completely detach Limiting slot 83. The electronic switch 36 is a contact switch, and the conductive elastic piece 362 of the contact switch is mounted by a cantilever fixed at one end. The movable end of the conductive elastic piece 362 is provided with a movable contact of the contact switch; at the upper end of the float 32 The transmission rod 33 is directed to the movable end of the conductive elastic piece 362 of the contact switch 36; when the float 32 is floating, the transmission ejector 33 upwardly pushes up the conductive elastic piece 362 of the contact switch, so that the static contact and fixing of the conductive elastic piece 362 The static contact 361 of the contact switch above the top cover of the water tank contacts, the contact switch is turned on, the control circuit receives the electrical signal of the contact switch conduction, and the water level is normally operated; when the inlet port 80 of the water tank 8 is not When the water flow pumping or water flow driving force and buoyancy are insufficient, the float 32 and the transmission ram 33 move downward due to gravity, the conductive elastic piece 362 of the contact switch 36 rebounds, the contact switch is disconnected, and the control circuit The electrical signal that the contact switch is turned off is received and the operation control of the water level abnormality is applied.

In this example, the outer wall of the float 32 is provided with an outwardly extending boss 320. When the water tank is not water, the boss 320 is buckled at the notch of the limiting slot 83, and the bottom of the float 32 does not overlap with the water inlet. 80 face contact.

In addition, in this example, at the bottom of the limiting groove 83 near the water inlet 80, there are at least two upwardly projecting legs 82. When the water tank 83 is dry or the amount of water is insufficient to float the float 32, the float 32 is placed. On the leg 82, water is smoothly flowed in from the water inlet.

The technical solution disclosed in this example uses the float to be more uniform and the upper and lower movements are more stable. At the same time, the elastic switch is used to improve the sensitivity of the electronic switch, and the water shortage protection alarm performance is more reliable, and the probability of occurrence of false alarms is effectively reduced.

Claims

A water shortage protection device for an air conditioner fan, the water shortage protection device comprises a float, a transmission ejector and an electronic switch, the float and the transmission ejector are installed in the water tank, and the electronic switch is mounted on the top cover of the water tank; Lie in:

The float is inserted into the limiting slot at the bottom of the water tank, and the slot wall of the limiting slot surrounds the water inlet hole of the water tank; the outer diameter of the float is matched with the inner diameter of the limiting slot, and the float can only be limited The slot moves up and down and cannot move left and right. When the sink is filled with water and the float floats to the highest position, the float will not completely disengage from the limit slot.
The water shortage protection device for an air conditioning fan according to claim 1, wherein:

The electronic switch is a contact switch, and the conductive elastic piece of the contact switch is mounted by a cantilever fixed at one end, the movable end of the conductive elastic piece is provided with a movable contact of the contact switch; the transmission rod located at the upper end of the float is directed to the The movable end of the conductive elastic piece of the contact switch; when the float is floating, the driving ejector pin up the conductive elastic piece of the contact switch, so that the static contact of the conductive elastic piece and the contact switch fixed above the top cover of the water tank are static Contact contact, contact switch is turned on; when the water inlet of the water tank is pumped or the water flow driving force and buoyancy are insufficient, the float and the transmission ejector are moved downward by gravity, and the conductive elastic piece rebounds, the contact The switch is open.
The water shortage protection device for an air conditioning fan according to claim 1, wherein:

An outwardly extending boss is disposed on the outer wall of the float. When the water tank is not water, the boss is buckled at the notch of the limiting slot, and the bottom of the float does not contact the inlet surface.
The water shortage protection device for an air conditioning fan according to claim 1, wherein:

At the bottom of the limiting slot, at least two upwardly protruding legs are arranged at the bottom of the water inlet. When the water tank is not watery or the amount of water is insufficient to float the float, the float is placed on the legs to ensure smooth water from the water inlet. Inflow.