TWI629463B - Water quality sensor - Google Patents

Abstract

The invention relates to a water quality sensor, wherein an inner casing is arranged in a base of the casing, and an inner working module is arranged in the inner casing for detecting the water quality of the washing liquid in the washing appliance, When the manufacturing is inadvertent or cracked due to collision, the inner casing of the base can be used to protect the actuation module so that the washing liquid does not directly flow into the actuation module, thereby avoiding the circuit substrate in the actuation module. A short circuit occurs to improve the water resistance and service life of the water quality sensor.

Description

Water quality sensor

The invention provides a water quality sensor, in particular to use the inner casing installed in the base of the casing to improve the waterproof performance, so as to avoid the situation that the operating module stored in the inner casing is easily short-circuited.

According to the general household electrical appliances, some of them need to be connected to a water source for work, such as washing machines, dishwashers, etc., using water flow with cleaning liquid, detergent, etc. for cleaning operations, so that clothes, dishes and dishes can be used without having to do it. Cleaned, but during the cleaning process, the water inside the washing machine is affected by dust, fines or cleaning liquid, detergent, etc., which causes the turbidity of the water to be improved, or the water inside the washing machine is adhered to the laundry. Dirty, fines or dust, as well as the cleaning liquid and detergent added to the water, the hardness of the tap water, etc., will also lead to an increase in the turbidity and particle concentration of the water, and must be cleaned by several times of clean water. In order to clean the clothes or dishes, the ion concentration of the water supply meets the testing standards. At present, in the washing appliances, a water quality sensor is installed, and the water source is sensed by the projection light source to receive and reflect. Sensing the water particle concentration (eg, undissolved detergent, impurities or dust or hair or clothing dander, batt, etc.) for judging water quality Turbidity case, resetting washing appliances cleaning operation mode (such as: increase the cleaning time or extend the cleaning time, etc.).

However, when the outer shell of the water quality sensor is poorly produced or transported, it is subjected to external force. In the case of collision, cracks are likely to occur, and if the washing water has particles with a large particle size (such as copper plates or small stones), it is easy to hit the outer shell of the water quality sensor during the cleaning process, and the water quality is long-term. The outer casing of the detector is also subject to impact and cracks, which causes the washing water to flow from the crack to the water quality sensor during operation, causing the circuit board inside the water quality sensor to short-circuit and cause washing. Damage to the appliance, so that the washing appliance can no longer be used.

Therefore, how to solve the above-mentioned lack of inconvenience and inconvenience is the direction that the relevant industry players in this industry are eager to study and improve.

The main purpose of the present invention is to provide a light-permeable inner casing in the base of the casing, and an operating module for detecting the quality of the washing liquid in the washing appliance is housed in the storage space of the inner casing. When the susceptor is inadvertently processed or cracked due to collision, the operating module can be protected through the inner casing of the pedestal to prevent the washing liquid in the washing appliance from directly flowing into the operating module, thereby preventing the movement. The circuit board of the module is electrically connected to the washing liquid to cause a short circuit, thereby achieving the purpose of improving the waterproofness and service life of the water quality sensor.

The secondary object of the present invention is that when the inner casing is installed in the accommodating space of the susceptor, the waterproof gasket is pressed by the bottom surface of the inner ring of the inner casing and the accommodating groove to generate compression deformation, thereby filling The gap between the base and the inner casing has a waterproof effect, and the waterproof gasket forms a gap between the base and the inner casing, so that when the water quality sensor is in the process of transportation, The elastic pre-stress of the waterproof gasket reduces the sway and cooperates with the gap between the base and the inner casing to prevent the base from being cracked by the collision, and the inner casing is cracked, thereby improving the waterproof performance. purpose.

Another object of the present invention is to extend the light emitting element of the light sensing portion The light-shielding element is disposed in the through-hole of the light-shielding element, and the light-shielding element is disposed between the light-emitting element and the light-receiving element, and when the light-emitting element emits light, the light-receiving element is not directly irradiated to prevent the light from being irradiated to the washing. Before the washing liquid in the electric appliance, the light receiving element thereof has generated a saturated crosstalk.

A further object of the present invention is that the light receiving element is a concentrating effect of the cone-shaped concentrating body that can pass through the concentrating portion, thereby improving the consistency and accuracy of the detection, and making the judgment of the cleaning operation more accurate. In turn, the washing appliance achieves the purpose of better water utilization.

1‧‧‧shell

11‧‧‧Base

110‧‧‧ accommodating space

111‧‧‧Transparent panel

112‧‧‧ accommodating slots

1121‧‧‧Resistance

113‧‧‧Withholding department

1131‧‧‧Glossy buckle

12‧‧‧ inner casing

120‧‧‧Storage space

121‧‧‧Transmission Department

122‧‧‧Concentration Department

1221‧‧‧ concentrator

123‧‧‧ convex ring

124‧‧‧Waterproof gasket

1240‧‧‧Perforation

13‧‧‧ Cover

131‧‧‧Detention Department

1311‧‧‧ buttonhole

132‧‧‧through hole

2‧‧‧ actuation module

21‧‧‧ circuit board

211‧‧‧Limited holes

212‧‧‧ card holder

22‧‧‧Light Sensing Department

221‧‧‧Light emitting elements

222‧‧‧Light receiving components

23‧‧‧ shading elements

231‧‧‧through hole

232‧‧‧Barrier

233‧‧‧Bump

234‧‧‧ buckle arm

24‧‧‧Electrical connector

3‧‧‧Washing appliances

31‧‧‧ Washing liquid

311‧‧‧ granules

The first figure is a three-dimensional appearance of the present invention.

The second figure is a perspective exploded view of the present invention.

The third figure is a perspective exploded view of another perspective of the present invention.

The fourth drawing is a side cross-sectional view of the present invention.

The fifth diagram is a usage state diagram of the present invention.

In order to achieve the above objects and effects, the technical means, the structure, the method of the implementation, and the like, which are used in the present invention, are described in detail in the preferred embodiments of the present invention.

Referring to the first to fifth figures, it can be clearly seen from the figure that the water quality sensor of the present invention comprises a housing 1 and an actuation module 2, wherein the housing 1 includes a base 11 and an inner casing. The body 12 and the cover 13 have a recessed accommodating space 110 formed therein and are disposed at the bottom of the accommodating space 110. A transparent panel 111 is provided, and a receiving groove 112 for enlarging the aperture is disposed at the top of the accommodating space 110, and an annular abutting surface 1121 is formed at the bottom surface of the accommodating groove 112, and a fastening portion is further disposed on the top surface of the pedestal 11. 113, and the fastening portion 113 is disposed on the surface of the base 11 with a plurality of protruding buckles 1131 arranged at an annular interval, and a through hole 132 is formed in the center of the cover body 13, and the transparent material is received in the accommodating space 110. The inner casing 12 is provided with a storage space 120 inside the inner casing 12, and a light transmitting portion 121 is disposed at the bottom of the storage space 120, and a light collecting portion 122 is disposed on the surface of the light transmitting portion 121, and the light collecting portion is concentrated. The portion 122 is provided with a conical concentrating body 1221, and a convex ring 123 located in the accommodating groove 112 is disposed outwardly at the opening of the accommodating space 120, and is disposed on the inner casing 12 to be positioned on the convex ring 123. The waterproof gasket 124 is disposed between the bottom surface and the bottom of the receiving groove 112, and the waterproof gasket 124 is provided with a through hole 1240 for the inner casing 12 to pass through, and a cover 13 is disposed on the top of the base 11, and the cover 13 is provided at the periphery of the cover 13. The latching portion 131 is fastened to the latching portion 113, and the latching portion 131 is disposed at the periphery of the cover body 13 for being fastened to the plurality of latches 1131. The number of button hole 1311.

The operation module 2 includes a circuit board 21 , a light sensing unit 22 , a light shielding element 23 , and an electrical connector 24 . The circuit board 21 is horizontally positioned in the housing space 120 of the inner casing 12 and is adjacent to the storage space 120 . The bottom surface is formed in a mutually parallel state, and the circuit board 21 is provided with a plurality of limiting holes 211 and a plurality of latching holes 212, and is electrically connected to the bottom surface of the circuit board 21 at a distance from the light transmitting portion 121 of the inner casing 12. The light emitting element 221 and the light receiving element 222 of the light sensing portion 22 are separated from each other by the light emitting element 221 and the light receiving element 222, and the light receiving element 222 is a light collecting body 1221 spaced apart from the light collecting portion 122. A light-shielding element 23 is disposed under the light-emitting element 221, and a light-shielding element 23 is disposed above and below the light-emitting element 221 at a position corresponding to the through-hole 231 through which the light-emitting element 221 extends, and the light-shielding element 23 is located at the light. A blocking layer 232 is disposed between the transmitting element 221 and the light receiving element 222, and the light blocking element 23 is disposed around the through hole 231 for insertion The protruding post 233 of the limiting hole 211 and the latching arm 234 for holding in the plurality of latching holes 212, and the top surface of the circuit board 21 is electrically connected to the electrical connector 24 for providing the through hole 132. .

The inside of the pedestal 11 of the housing 1 is formed with a recessed accommodating space 110, and a transparent panel 111 is disposed at the bottom of the accommodating space 110. However, the above is only a preferred embodiment of the susceptor 11, and The base 11 of the housing 1 can also be a completely transparent design to pass light; and the waterproof gasket 124 of the inner casing 12 can be made of a material of elastic material (such as silicone or rubber).

The light-emitting element 221 and the light-receiving element 222 of the light-sensing portion 22 are electrically connected to the bottom surface of the circuit substrate 21 by means of a surface-attachable or dual-in-line package; and the light sensing portion 22 The light emitting element 221 can be an infrared light emitter, an ultraviolet light emitter or a laser light emitter, etc., and the light receiving component 222 can be a digital type ambient light sensor or can correspond to the wavelength of the light emitting element 221 Detector.

However, the distance A between the light sensing portion 22 of the actuation module 2 and the outer surface of the transparent panel 111 of the susceptor 11 is between 1.5 and 15 mm, and the light emitting element 221 and the light receiving component of the light sensing portion 22 222 is electrically connected to the bottom surface of the circuit substrate 21, and the center distance B between the light-emitting element 221 and the light-receiving element 222 is between 3 and 10 mm, and the light-shielding element 23 is located at the light-emitting element 221 and the light-receiving element. The thickness C of the barrier layer 232 between 222 is between 1 and 5 mm.

In addition, the light-shielding element 23 of the actuation module 2 is disposed below the light-emitting element 221 of the light-sensing portion 22, and the light-shielding element 23 is provided with a through-hole 231 corresponding to the position of the light-emitting element 221, but the light-shielding element 23 In the actual application, the light sensing portion 22 can be disposed outside, and the through holes 231 are respectively disposed corresponding to the positions of the light emitting element 221 and the light receiving element 222.

When the invention is applied in practice, it is assembled in the washing appliance 3 (such as a washing machine or a dishwasher, etc.), so that the transparent panel 111 of the base 11 faces the inside of the washing space of the washing appliance 3, and the electrical connection plug (not shown) The electrical connector 24 is electrically connected to the actuation module 2 to provide the electrical energy required for the actuation module 2, and when the cleaning appliance 3 performs the cleaning operation, the circuit substrate 21 of the actuation module 2 is driven. The light emitting element 221 of the light sensing portion 22 emits light, and the light passes through the through hole 231 of the light shielding member 23, and then sequentially passes through the transparent portion 121 of the inner casing 12 and the transparent panel of the base 11. 111 to the washing liquid 31 in the washing appliance 3, however, under normal conditions, the reflection of light in the washing liquid 31 is rather weak, and conversely, if the washing liquid 31 contains particles 311 (such as dirt, sand or washing powder, etc.) When the light hits the particles 311 in the washing liquid 31 and causes scattering, at this time, part of the light in the washing liquid 31 enters the inner casing 12, and the inner casing 12 can pass through. The concentrating body 1211 of the concentrating portion 121 collects light for the light sensing portion 22 The receiving component 222 performs a detecting operation for knowing the digital sensing value (such as a turbidity value or a photometric value, etc.) in the washing liquid 31, and the washing device 3 can determine the washing liquid 31 according to the digital sensing value. Whether there are too many particles 311 in the process, and then decide whether to continue the washing operation.

Furthermore, the actuation module 2 of the present invention is stored in the inner casing 12 In the middle 120, the inner casing 12 is peripherally provided with a base 11. If the base 11 is inadvertently processed or cracked due to collision, the base 11 has an inner casing 12 to protect the movable mold. In the group 2, the washing liquid 31 in the washing appliance 3 does not directly flow into contact with the actuation module 2, so as to avoid short circuit of the circuit board 21 of the actuation module 2, thereby improving the waterproofness and use of the water quality sensor. The usefulness of life.

However, the waterproof gasket 124 of the inner casing 12 of the present invention is made of an elastic material. When the inner casing 12 is installed in the accommodating space 110 of the base 11, the waterproof gasket 124 is subjected to a convex ring. The bottom surface 123 is pressed against the abutting surface 1121 of the accommodating groove 112 to generate a slight compression deformation to fill the gap between the pedestal 11 and the inner casing 12, and has a waterproof effect, and the waterproof gasket 124 is sleeved. The outer wall surface of the inner casing 12 forms a gap between the base 11 and the inner casing 12. When the water quality sensor is transported, the elastic preload of the waterproof gasket 124 of the elastic material can be used. In order to reduce the sway and cooperate with the gap between the pedestal 11 and the inner casing 12 to prevent the susceptor 11 from being cracked by the collision, the inner casing 12 is accompanied by cracks, thereby improving the waterproof performance.

In addition, a light-shielding element 23 is disposed under the light-emitting element 221 of the light-sensing portion 22 of the present invention, and the light-emitting element 221 is inserted into the through-hole 231 of the light-shielding element 23, and the light-shielding element 23 is located at the light emission. A barrier layer 232 is disposed between the element 221 and the light receiving element 222. Therefore, when the light emitting element 221 emits light, only the outside of the inner casing 12 is irradiated, and the light receiving element 222 is not directly irradiated to the side. Before the light is irradiated to the washing liquid 31 in the washing apparatus 3, the light receiving element 222 has generated a saturated crosstalk, and the light receiving element 222 is a condensing effect of the tapered concentrating body 1221 permeable to the concentrating portion 122. To improve the consistency and precision of its detection to make light The receiving component 222 determines that the cleaning operation can be more accurate, thereby providing the washing appliance 3 with better water utilization.

In summary, the water quality sensor of the present invention can achieve its efficacy and purpose when used. Therefore, the present invention is an invention with excellent practicability, and is an application for conforming to the invention patent, and submits an application according to law. I hope that the trial committee will grant this case as soon as possible to protect the inventor's hard work. If there is any doubt in the trial committee, please do not hesitate to give instructions, the inventor will try his best to cooperate, and feel really good.

Claims (11)

A water quality sensor includes a housing and an actuation module, wherein: the housing has a recessed receiving space inside the base, and a transparent panel is disposed at the bottom of the receiving space, and the base is The top surface is provided with a fastening portion, and the inner casing is accommodated in the accommodating space, and the inner casing is provided with a storage space therein, and a light-transmitting portion for the light to pass through at the bottom of the storage space is provided at the top of the pedestal. The cover body is provided with a fastening portion that is engaged with the fastening portion at the periphery of the cover body; the actuation module is a circuit having a state of being horizontally positioned in the storage space of the inner casing and parallel to the bottom surface of the storage space. a light-sensing portion is electrically connected to the bottom surface of the circuit board, and the light-sensing portion has a light-emitting element and a light-receiving element at a distance from each other, and a light-shielding element is disposed at the bottom of the light-emitting element, and the light-shielding element is correspondingly A through hole for the light emitting element to extend into and pass the light is disposed at a position of the light emitting element, and the light blocking element is disposed between the light emitting element and the light receiving element, and is electrically connected to the top surface of the circuit board. Electricity Connector. The water quality sensor according to claim 1, wherein the top of the accommodating space of the pedestal is a accommodating groove provided with an enlarged aperture and positioned for the inner casing, and a ring is formed at the bottom surface of the accommodating groove. Resist the face. The water quality sensor according to the second aspect of the invention, wherein the opening of the storage space of the inner casing is outwardly provided with a convex ring located in the accommodating groove, and the inner casing is sleeved and positioned on the inner casing. A waterproof gasket made of an elastic material between the bottom surface of the ring and the bottom of the receiving groove, and the waterproof gasket has a through hole for the inner casing to pass through. The water quality sensor according to claim 1, wherein the fastening portion of the base is located The surface of the base is provided with a plurality of buckles arranged at an annular interval, and the fastening portion of the cover body is disposed at a periphery of the cover body and has a plurality of buckle holes for being fastened on the plurality of convex buckles, and then the center of the cover body A through hole having a power supply connector through the set position is worn. The water quality sensor according to claim 1, wherein the inner casing of the casing is made of a transparent material. The water quality sensor according to claim 1, wherein the surface of the light transmissive portion of the inner casing is provided with a concentrating portion for collecting light and being spaced apart from the light receiving element, and the concentrating portion is A cone-shaped concentrating body is provided in the direction of the light receiving element. The water quality sensor of claim 1, wherein the circuit board of the actuation module is provided with a plurality of limiting holes and a plurality of holding holes, and the shielding element is disposed at a periphery of the through hole A stud inserted in the plurality of retaining holes and a latching arm for holding in the plurality of retaining holes. The water quality sensor according to claim 1, wherein the light emitting element of the light sensing portion is an infrared light emitter, an ultraviolet light emitter or a laser light emitter, and the light receiving component is in a digital form. The ambient light sensor or the sensor that can correspond to the wavelength of the light emitting element, and the light emitting element and the light receiving element are electrically connected to the circuit substrate by using a surface adhesion method or a dual in-line package method. The water quality sensor according to claim 1, wherein the light-emitting element and the light-receiving element of the light-sensing portion have a center distance between each other of 3 to 10 mm. The water quality sensor according to claim 1, wherein the distance from the light sensing portion of the actuation module to the outer surface of the transparent panel of the base is between 1.5 and 15 mm. The water quality sensor according to claim 1, wherein the thickness of the barrier layer between the light-emitting element and the light-receiving element is between 1 and 5 mm.