CN202092316U - Water shortage protecting device of water circulating system - Google Patents

Abstract

The utility model provides a water shortage protecting device of a water circulating system, and the water circulating system is provided with pipelines and a water pump for enabling water to flow in the pipelines. The water shortage protecting device is characterized in that a pressure detector and a controller are arranged in the pipelines, and the pressure detector detects water pressure in the pipelines. When the water pressure is lower than a certain value, the controller is actuated to stop the water pump from running.

Description

Water shortage protection device for water circulation system

technical field

The utility model relates to a water shortage protection device for a water circulation system, in particular to a water shortage protection device for a water circulation system which utilizes heat pump technology to produce hot water.

Background technique

In recent years, with the shortage of energy in the world and the maturity of heat pump technology, the heat pump hot water market, which uses heat pump technology to produce hot water, has grown rapidly in various countries due to its high efficiency, energy saving, environmental protection, safety and many other advantages.

In the water circulation system using heat pump technology to produce hot water, if the water flow is too small or cut off during the operation of the water pump, the water pump will be damaged.

In the existing water circulation system using heat pump technology to produce hot water, a flow switch is generally installed on the pipeline connected to the water pump to prevent the water flow from being too small or cut off during the operation of the water pump, thereby reducing the probability of damage to the water pump and protecting the water pump. As shown in Figure 5: the water circulation system has a pipeline 9 and a water pump 3 that allows water to flow in the pipeline 9. A flow switch 4 is arranged in the pipeline 9. After the water pump 3 is in operation, the water and the refrigerant pass through the water fluorine. The water-fluorine heat exchanger 2 in the exchange group 1 performs heat exchange. If the water flow of the water circuit is too small or cut off, the flow switch 4 will act to stop the water pump 3 for protection.

In the prior art as mentioned above, the flow rate of the water pump has a process from small to large after operation, and the flow rate cannot be judged immediately. It is necessary to wait for the water pump to run stably before judging that the water flow rate is too low or the flow is cut off. If the system is short of water during operation, since the water pump has been running for a period of time before the flow switch is activated, the water pump may have been damaged or damaged at this time, and the water pump cannot be protected in the first time.

Utility model content

In view of this, the main purpose of this utility model is to provide a water shortage protection device for the water circulation system, so as to realize whether there is water in the water circulation circuit when the water pump is running, effectively protect the water pump in the first time, and prevent the water pump from being damaged. .

Technical solution 1: A water shortage protection device for a water circulation system, the water circulation system has a pipeline and a water pump for making water flow in the pipeline, and a device is installed in the pipeline to detect the water in the pipeline pressure detector, and a controller that controls the water pump to stop running when the water pressure is lower than a certain value.

It can be known from technical solution 1 that since a pressure detector and a controller are installed in the pipeline, when the water pressure in the pipeline is lower than a certain value, the controller will act to stop the water pump, which can prevent the water pump from running in the case of water shortage. cause damage. Since water shortage is detected by water pressure, compared with the detection of water shortage by flow rate, it can be detected without running the water pump, which effectively prevents the water pump from running in the state of water shortage and protects the water pump from damage.

Technical solution 2: According to the water shortage protection device of the water circulation system of technical solution 1, the pressure detector and the controller are composed of a pressure switch, and the electrical contacts of the pressure switch are connected in series with the power supply circuit of the water pump directly or through a relay .

It can be seen from the technical solution 2 that since the pressure detector and the controller are composed of pressure switches, it has the effects of simple structure, easy control and low cost. The electric contact of the pressure switch is directly or connected in series with the power supply circuit of the water pump through a relay, so as to control the operation of the water pump.

Technical solution 3: According to the water shortage protection device of the water circulation system of technical solution 1, the water circulation system is a closed water circulation system, which is composed of a closed pipeline and a water pump, and a water supply valve is provided in the closed pipeline.

It can be known from technical solution 3 that since the water supply valve is provided in the closed pipeline, once the water in the pipeline is short of water, the water supply valve can be used to replenish water in the pipeline, so that the water circulation system can run for a long time.

Technical solution 4: The water shortage protection device of the water circulation system according to the technical solution 3 has a water tank, and the water tank is located in the pipeline and constitutes a part of the pipeline.

It can be seen from technical solution 4 that since the water tank constitutes a part of the pipeline, the water in the water tank can be directly heated.

Technical solution 5: The water shortage protection device of the water circulation system according to the technical solution 3, which has a water tank, and the pipeline is a closed pipeline, a part of which is located in the water tank.

It can be seen from technical solution 5 that since the pipeline is a closed pipeline, the medium in the pipeline can be different from the substance of the water tank, that is, the pipeline can be other media except water, such as using antifreeze, etc. range of use.

Technical solution 6: The water shortage protection device of the water circulation system according to the technical solution 4 or 5, wherein the water circulation system is a water fluorine heat exchanger for producing hot water using heat pump technology.

It can be known from technical solution 6 that since the water circulation system is a water fluorine heat exchanger for hot water production by using heat pump technology, it can protect the water fluorine heat exchanger from damage to the water pump due to water shortage.

Description of drawings

Fig. 1 is the connection schematic diagram of embodiment 1 of the water shortage protection device of the water fluorine heat exchanger water circulation system provided by the utility model;

Fig. 2 is the connection schematic diagram of embodiment 2 of the water shortage protection device of the water fluorine heat exchanger water circulation system provided by the utility model;

Fig. 3 is the connection schematic diagram of embodiment 3 of the water shortage protection device of the water fluorine heat exchanger water circulation system provided by the utility model;

Fig. 4 is a schematic connection diagram of using the water shortage protection device of the water circulation system of the water fluorine heat exchanger in the split solar water heater.

Fig. 5 is the connection schematic diagram of the water shortage protection device of the water circulation system in the prior art;

Description of reference symbols

1-water fluorine exchange unit; 2-water fluorine heat exchanger; 3-water pump; 4-flow switch; 5-water tank; 6-pressure switch; 7-automatic exhaust valve; 8-coil; 9-pipeline; 10- Solar heating panels.

Detailed ways

The water shortage protection device of the water circulation system provided by the utility model will be specifically described below through specific embodiments in conjunction with the drawings.

Example 1:

Hereinafter, the utility model will be described by taking the water-fluorine heat exchanger for producing hot water by utilizing the heat pump technology as an example.

Figure 1 is a schematic connection diagram of Embodiment 1 of the water shortage protection device of the water fluorine heat exchanger water circulation system provided by the utility model, as shown in the figure, the water shortage protection device of the water fluorine heat exchanger 2 has a pipeline 9 and a water pump 3 , the pipeline 9 is connected to the upper and lower ends of the water tank 5. The water pump 3 makes water flow in the pipeline 9, and a pressure switch 6 is also arranged in the pipeline 9, and the pressure switch 6 constitutes a pressure detector and a controller. The electric contacts of the pressure switch 6 can be directly connected in series in the power supply circuit of the water pump 3, and can also be connected in series in the power supply circuit of the water pump 3 through a relay (not shown in the figure) to control the water pump 3 operation. When the water pump 3 is running, the water in the water tank 5 flows in the pipeline 9 and exchanges heat with the refrigerant flowing in the refrigerant pipeline in the water-fluorine heat exchanger 2 to generate hot water, thereby continuously heating the hot water in the water tank 5 .

The pressure switch 6 always checks the pressure of the system no matter before or during the operation of the system. When the water pressure in the pipeline 9 is too low or the pipeline 9 is repaired and the water is cut off, the pressure will be too low or no pressure. The pressure switch 6 Disconnect, the water pump 3 stops running. In this process, the specific pressure value standard on which the pressure switch 6 is based can be set according to the water pressure of the municipal water supply in China. For example, the current water pressure of the municipal water supply is generally 0.3-0.4Mpa, and the pressure of the pressure switch 6 in the system can be set. When the value is lower than 0.05Mpa, it is disconnected, and when the pressure value of the system reaches 0.15Mpa, the pressure switch 6 is turned on again.

The water shortage protection device of the water circulation system also has an automatic exhaust valve 7. The automatic exhaust valve 7 is installed at the highest point of the water circulation system, which can automatically discharge the gas in the system at any time, and is used in conjunction with the pressure switch 6. The combination of the two It can ensure that the water pressure in the water circulation system meets the working range of the pressure switch 6 at all times. The pressure detector in the pressure switch 6 detects the water pressure in the pipeline 9, and when the water pressure is lower than a certain value, the controller acts to disconnect the pressure switch 6, and the water pump 3 stops running.

The water circulation system also has a water tank 5, the water tank 5 is located in the pipeline 9, and is directly connected to the two ends of the water fluorine exchange unit 1 through the pipeline 9, forming a part of the pipeline 9, which can control the water in the water tank 5. Apply heat directly. The water circulation system is a water fluorine heat exchanger 2 for producing hot water by using heat pump technology, which can protect the water fluorine heat exchanger 2 from damage to the water pump 3 due to lack of water.

The closed pipeline 9 and the water pump 3 form a closed water circulation system, and a replenishment valve (not shown in the figure) is provided in the closed pipeline 9. Once the water in the pipeline 9 is short of water, it can pass through the replenishment valve to flow into the pipeline 9. Replenish water, so that the water circulation system can run for a long time.

Whether the water shortage is detected by the pressure of the water, compared with the detection of the water shortage by the flow rate, can be detected without running the water pump 3, which effectively prevents the water pump 3 from running in a water shortage state and protects the water pump 3 from damage.

Example 2:

Fig. 2 is the connection schematic diagram of Embodiment 2 of the water shortage protection device of the water circulation system provided by the utility model. It can be seen from the figure that the utility model does not specifically limit the position of the pressure switch 6, except as in Example 1 The middle can be arranged outside the pipeline 9, and the pressure switch 6 can also be arranged on the top of the water tank. The pressure detector in the pressure switch 6 detects the water pressure in the water tank 5, and when the water pressure is lower than a certain value, the controller acts to disconnect the pressure switch 6, and the water pump 3 stops running.

Example 3:

Fig. 3 is the connection schematic diagram of embodiment 3 of the water shortage protection device of the water circulation system provided by the utility model, as can be seen from the figure, the circulating water pipeline 9 is a closed pipeline, and a part of it is located in the water tank 5 to form The coil pipe 8 shown is kept isolated from the water in the water tank 5. Therefore the medium in the pipeline 9 can be different from the substance of the water tank 5, that is, other mediums except water can be used in the pipeline 9, such as utilizing antifreeze etc., which expands the scope of application.

The above-mentioned water shortage protection device for the water circulation system is not only suitable for the water circulation of hot water using heat pump technology, but also suitable for the closed circulation water of split solar heating hot water, the closed circulation water of gas wall-hung boiler, etc.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model, such as those shown in Figure 4 The water shortage protection device of the water circulation system shown above is added to the hot water circulation system in the split type solar energy to protect the water pump 3. At this time, the pipeline 9 forms a loop in the solar heating panel 10, and the two The end is connected with the coil pipe 8 in the water tank 5, and when the water pump 3 works, the water circulates in the pipeline 9 and the coil pipe 8, and the heat energy of the sun is transferred to the water tank 8. The pressure detector in the pressure switch 6 detects the water pressure in the pipeline 9, and when the water pressure is lower than a certain value, the controller acts to disconnect the pressure switch 6, and the water pump 3 stops to protect the water pump 3.

All should be included within the protection scope of the present utility model.

Claims (6)

1. A water shortage protection device for a water circulation system, the water circulation system has a pipeline and a water pump that allows water to flow in the pipeline, it is characterized in that, a device is installed in the pipeline to detect a pressure detector for water pressure, and A controller that controls the water pump to stop running when the water pressure is lower than a certain value. 2. The water shortage protection device of the water circulation system according to claim 1, characterized in that, the pressure detector and the controller are composed of a pressure switch, and the electric contacts of the pressure switch are directly or connected in series with the power supply of the water pump through a relay. in the loop. 3. The water shortage protection device of the water circulation system according to claim 1, characterized in that, the water circulation system is a closed water circulation system, which is composed of a closed pipeline and a water pump, and a water supply valve is arranged in the closed pipeline. 4. The water shortage protection device for a water circulation system according to claim 3, characterized in that it has a water tank, and the water tank is located in the pipeline and constitutes a part of the pipeline. 5. The water shortage protection device for a water circulation system according to claim 3, characterized in that it has a water tank, and the pipeline is a closed pipeline, a part of which is located in the water tank. 6. The water shortage protection device for the water circulation system according to claim 4 or 5, characterized in that, the water circulation system is a water-fluorine heat exchanger for producing hot water using heat pump technology.

Images