CN201476368U - Solar water heater water temperature and level sensor - Google Patents

Abstract

The utility model discloses a water temperature and water level sensor for a solar water heater, which comprises a water temperature sensor 6, water level sensor electrodes 8, 9, 10, 11, a water temperature and water level signal processing module 1, and also includes a connection terminal 2, a silica gel fixing part 3, and a stainless steel pipe 4 , insulating silicone rubber 5 and silicone ring 7, the area of the water level sensor electrodes 8, 9, 10, 11 is increased, and the upper ends of the electrodes are provided with connection terminals 13, 14, 15, 16, 17 to connect with the signal lines, and each connection point And the processing circuit is placed in the silicone ring 7. This design avoids contact between signal lines, components and water storage, prevents corrosion, increases electrode area, and prevents scale formation. The water temperature sensor 6 is placed in the stainless steel tube 12, and the upper end of the water temperature sensor 6 and the stainless steel tube 12 is sealed in the silicone ring 7. When detecting the water temperature, it does not need to be in direct contact with the stored water, effectively preventing damage to components and formation of scale.

Description

Solar water heater water temperature and level sensor

technical field

The utility model relates to a water temperature and water level detection device for a solar water heater, which is suitable for the energy-saving and environment-friendly solar heat utilization field.

Background technique

With the gradual development of solar thermal utilization, solar water heaters have developed rapidly as the main representative of solar thermal utilization. As a component that can detect water temperature and level, and convert the detected water temperature and level into electrical signals, solar water heater It is widely used in water heaters and also plays a pivotal role. Since the water temperature and water level sensor often works in the water tank of the water heater, the signal lines and electronic devices are easily corroded during the long-term boiling and steaming process. Water quality problems are serious in many areas of our country, and scale is easy to adhere to sensor electrodes and temperature-sensing components. Therefore, scale resistance, sealing of electrodes, signal lines and temperature sensing devices have always been difficult problems to solve. The water temperature and water level sensor directly affects the water temperature and water level measurement and control device, and the stable operation of the water temperature and water level sensor is the guarantee for the intelligent control of the entire solar water heater.

Contents of the invention

The purpose of the utility model is to provide a solar water heater water temperature and water level sensor which can better prevent the formation of scale and the signal line is not easy to be corroded.

In order to achieve the above purpose, the solar water heater water temperature and water level sensor includes a water temperature sensor 6, water level sensor electrodes 8, 9, 10, 11, a water temperature and water level signal processing module 1, and also includes a terminal 2, a silicone fixing part 3, a stainless steel tube 4, and an insulating silicon Rubber 5 and silicone ring 7. Connecting terminals 13, 14, 15, 16, 17 are arranged on the upper end of the electrode to connect with the signal line, and each connection point and processing circuit are placed in the silicone ring 7. Since the silica gel ring 7 does not contact the water storage in the water heater tank, it effectively prevents the storage water from infiltrating into the silica gel ring, and prevents the signal lines and electronic components from being corroded by the water storage. At the same time, the areas of the electrodes 8, 9, 10, and 11 of the water level sensor are increased, which effectively resists the formation of scale.

On the other hand, the water temperature sensor 6 is placed in the stainless steel tube 12 , and the upper ends of the water temperature sensor 6 and the stainless steel tube 12 are sealed in the silicone ring 7 . Since the stainless steel tube 12 has good thermal conductivity, it does not affect the detection of the water temperature by the water temperature sensor, and at the same time prevents the entry of the stored water, avoids the contact between the temperature sensing device and the stored water, and prevents the formation of scale and the corrosion of components.

Due to the adoption of the above technical solution, the anti-scaling ability of the water temperature and water level sensor of the solar water heater is improved, and the phenomenon that the sensor signal line is corroded by water storage, the resistance increases or even the signal line is corroded and broken, which directly leads to the failure of the control components. The reliability of the water temperature and water level sensor is greatly improved, and the service life of the sensor is also extended.

Description of drawings

Fig. 1 is the structural representation of water temperature water level sensor;

FIG. 2 is a cross-sectional view of FIG. 1A , a schematic diagram of connection between sensor terminals and signal lines.

Implementation

As shown in the figure, the water temperature and water level sensor of the solar water heater includes a water temperature sensor 6, water level sensor electrodes 8, 9, 10, 11, a water temperature and water level signal processing module 1, and also includes a terminal 2, a silicone fixing part 3, a stainless steel tube 4, and an insulating silicon The rubber 5 and the silicone ring 7 increase the area of the water level sensor electrodes 8, 9, 10, 11, and the upper ends of the electrodes are provided with connection terminals 13, 14, 15, 16, 17 to connect with the signal lines, each connection point and the processing circuit Placed in the silicone ring 7.

The electrodes 8, 9, 10, 11 of the water level sensor are designed according to the ratio of 25:50:75:100, and made into a slender cylindrical shape. The electrodes are made of stainless steel. When the water level rises to a certain height, due to the conductivity of the water, the Electrodes of different water level sensors are short-circuited to generate different electrical signals, and the detected signals are sent to the water temperature and water level signal processing module 1 for processing, and then sent to the display.

The water temperature sensor 6 is placed in the stainless steel tube 12, and the upper end of the water temperature sensor 6 and the stainless steel tube 12 is sealed in the silicone ring 7. Because stainless steel has good thermal conductivity, the water temperature sensor can feel the temperature change of the water tank without directly contacting the water source. Since the upper ends of the sensor electrodes are all sealed in the silicone ring 7 and located above the water surface, it can prevent the corrosion of signal lines and components to a certain extent.

Claims (2)

1. A water temperature and water level sensor for a solar water heater, comprising a water temperature sensor (6), water level sensor electrodes (8, 9, 10, 11), a water temperature and water level signal processing module (1), also including a terminal block (2), and a silicone fixing part (3), stainless steel pipe (4), insulating silicone rubber (5) and silicone ring (7), it is characterized in that: the area of water level sensor electrode (8,9,10,11) has been increased, at the upper end of water temperature water level electrode Connecting terminals (13, 14, 15, 16, 17) are provided to connect with signal lines, and each connection point and processing circuit are placed in the silicone ring (7). 2. The solar water heater water temperature and water level sensor according to claim 1, characterized in that: the water temperature sensor (6) is placed in the stainless steel tube (12), and the upper ends of the water temperature sensor (6) and the stainless steel tube (12) are sealed with a silicone ring (7) inside.

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