A solar collector antifreeze fluid recovery device

Abstract

The utility model discloses a kind of solar collector anti-freezing fluid recovery devices, belong to solar collector technical field, including recovery pipeline, input safety unit, anti-freezing fluid recovery and liquid supplement pump, output safety unit and pipeline valve device;The input safety unit, anti-freezing fluid recovery and liquid supplement pump, output safety unit and pipeline valve device are all installed on the recovery pipeline, the input safety unit is connected with the anti-freezing fluid recovery and liquid supplement pump front end;The anti-freezing fluid recovery and liquid supplement pump rear end is connected with output safety unit;The pipeline valve device includes electric ball valve, first manual ball valve, check valve, second manual ball valve and pressure relief valve.The utility model uses above-mentioned a kind of solar collector anti-freezing fluid recovery device, on the basis of commonly used anti-freezing fluid passive recovery, increase the active recovery mode and manual recovery mode of self-control, can make corresponding selection and adjustment according to actual situation.

Description

Technical Field

[0001] This utility model relates to the field of solar collector technology, and in particular to a solar collector antifreeze recovery device. Background Technology

[0002] Solar energy has large storage capacity and produces no environmental pollution, making it an important renewable and clean energy source. In the current context, with increasingly stringent carbon emission controls across various industries, there is a need to continuously increase the proportion of heating and thermal energy supplied by renewable energy sources. Solar thermal collector systems, by absorbing solar radiation and transferring heat to a heat transfer medium, achieve energy conversion, and their development prospects show a continuously growing trend.

[0003] Since solar collectors are placed outdoors, the temperature of the medium inside the collector is directly affected by the outdoor ambient temperature. In central and northern regions where outdoor temperatures may drop below freezing, the medium inside the solar collector system needs to contain a certain proportion of antifreeze, the concentration of which is determined based on local climate conditions.

[0004] Currently, for panel solar collectors, most projects only rely on passive antifreeze recovery. This means that after the solar collector absorbs solar radiation, the internal medium heats up and the pressure increases. When the antifreeze vaporization pressure exceeds the pressure relief valve's activation pressure, the unvaporized antifreeze is discharged through a recovery pipe into the antifreeze recovery and replenishment tank. This single method of antifreeze recovery cannot address the specific circumstances of different projects. Utility Model Content

[0005] The purpose of this invention is to provide a solar collector antifreeze recovery device. Based on the commonly used passive antifreeze recovery, it adds an automatic active recovery mode and a manual recovery mode, which can be selected and adjusted according to the actual situation.

[0006] To achieve the above objectives, this utility model provides a solar collector antifreeze recovery device, which has a solar collector connected to its inlet end and an antifreeze recovery and replenishment tank connected to its outlet end. The device includes a recovery pipeline, an input safety unit, an antifreeze recovery and replenishment pump, an output safety unit, and a pipeline valve device. The input safety unit, antifreeze recovery and replenishment pump, output safety unit, and pipeline valve device are all installed on the recovery pipeline. The input safety unit is connected to the front end of the antifreeze recovery and replenishment pump to ensure the safety of the antifreeze pressure entering the pump and the smooth flow. The output safety unit is connected to the rear end of the pump to ensure that the antifreeze pressure exiting the pump meets the standard and the delivery is stable. The pipeline valve device includes an electric ball valve, a first manual ball valve, a check valve, a second manual ball valve, and a pressure relief valve. The pipeline valve device is interspersed on the recovery pipeline to prevent safety accidents from occurring in the recovery pipeline.

[0007] Preferably, the recovery pipeline includes a first antifreeze recovery pipeline, a second antifreeze recovery pipeline, a third antifreeze recovery pipeline, and a replenishment pipeline; the solar collector is connected to the first antifreeze recovery pipeline, a pressure sensor is installed on the first antifreeze recovery pipeline, the pressure sensor is connected to an electric ball valve, the other end of the electric ball valve is connected to an input safety unit, the input safety unit includes an inlet pressure gauge for monitoring the suction side pressure, the other end of the inlet pressure gauge is connected to an inlet metal hose for absorbing vibration during operation, the other end of the inlet metal hose is connected to an inlet reducer for adjusting the diameter difference between the first antifreeze recovery pipeline and the inlet of the antifreeze recovery and replenishment pump, and the other end of the inlet reducer is connected to the antifreeze recovery and replenishment pump.

[0008] Preferably, the other end of the antifreeze recovery and replenishment pump is connected to the output safety unit. The output safety unit includes an outlet reducer for adjusting the diameter difference between the first antifreeze recovery pipeline and the outlet of the antifreeze recovery and replenishment pump. The other end of the outlet reducer is connected to an outlet metal hose for isolating the antifreeze recovery and replenishment pump from transmitting vibration to the outlet side during operation. The other end of the outlet metal hose is connected to an outlet pressure gauge for monitoring the output pressure. The other end of the outlet pressure gauge is connected to a check valve to ensure unidirectional flow of coolant.

[0009] Preferably, the second antifreeze recovery line is located between the pressure sensor and the electric ball valve, and a second manual ball valve is installed on the second antifreeze recovery line.

[0010] Preferably, the third antifreeze recovery line is located on the second antifreeze recovery line, and a pressure relief valve is installed on the third antifreeze recovery line.

[0011] Preferably, the replenishment pipeline is located between the electric ball valve and the inlet pressure gauge, and a first manual ball valve is installed on the replenishment pipeline, with the other end of the first manual ball valve connected to the replenishment port.

[0012] Preferably, the first antifreeze recovery line, the second antifreeze recovery line, and the third antifreeze recovery line are connected to the antifreeze recovery and replenishment tank in parallel.

[0013] According to the specific embodiments provided by this utility model, the following technical effects are disclosed: (1) By setting the opening pressure and reseating pressure of the pressure relief valve, the pressure relief valve will automatically open when the pressure exceeds the threshold and complete the passive recovery; when the pressure drops to a safe value, it will automatically close. The recovery process does not require manual intervention and is suitable for routine recovery under daily pressure fluctuations.

[0014] (2) This utility model uses a preset pressure sensor threshold and an automatic control to set the recovery time. When the pressure sensor detects that the pressure reaches the standard or the preset time is reached, the electric ball valve, antifreeze recovery and replenishment pump will automatically open. When the pressure sensor detects that the real-time pressure is at the threshold, the machine will automatically stop. The entire recovery process is completed automatically, saving manpower.

[0015] (3) When the equipment is powered off, the automatic control system malfunctions and the pressure does not reach the pressure relief valve threshold, the second manual ball valve can be manually opened to complete the manual recovery, thus avoiding the problem of antifreeze not being able to be recovered due to special faults.

[0016] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a solar collector antifreeze recovery device according to the present invention; Figure 2 This is a schematic diagram of the pipeline and instrumentation process of a solar collector antifreeze recovery device according to this utility model; Figure 3 This is a schematic diagram showing the location of a solar collector antifreeze recovery device in a solar collector antifreeze recovery system according to this utility model.

[0018] Figure Labels 1. First antifreeze recovery line; 2. Pressure sensor; 3. Electric ball valve; 4. First manual ball valve; 5. Inlet pressure gauge; 6. Inlet metal hose; 7. Inlet reducer; 8. Antifreeze recovery and replenishment pump; 9. Outlet reducer; 10. Outlet metal hose; 11. Outlet pressure gauge; 12. Check valve; 13. Second antifreeze recovery line; 14. Second manual ball valve; 15. Pressure relief valve; 16. Third antifreeze recovery line; 17. Solar collector; 18. Replenishment port; 19. Antifreeze recovery and replenishment tank. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0020] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] Example 1 like Figures 1-3 As shown, this utility model provides a solar collector antifreeze recovery device, which has a solar collector 17 connected to its inlet end and an antifreeze recovery and replenishment tank 19 connected to its outlet end. It includes a recovery pipeline, an input safety unit, an antifreeze recovery and replenishment pump 8, an output safety unit, and a pipeline valve device.

[0022] The input safety unit, antifreeze recovery and replenishment pump 8, output safety unit, and pipeline valve device are all installed on the recovery pipeline. The input safety unit is connected to the front end of the antifreeze recovery and replenishment pump 8 to ensure the safety of the antifreeze pressure entering the pump and the smoothness of its flow. The output safety unit is connected to the rear end of the pump to ensure that the antifreeze pressure exiting the pump meets the standard and that its delivery is stable. The pipeline valve device includes an electric ball valve 3, a first manual ball valve 4, a check valve 12, a second manual ball valve 14, and a pressure relief valve 15, and the valve types can be changed. The pipeline valve device is interspersed throughout the recovery pipeline to prevent safety accidents from occurring.

[0023] The recovery pipeline includes a first antifreeze recovery pipeline 1, a second antifreeze recovery pipeline 13, a third antifreeze recovery pipeline 16, and a replenishment pipeline. The first antifreeze recovery pipeline 1 is connected to the solar collector 17. A pressure sensor 2 is installed on the first antifreeze recovery pipeline 1. A protection pressure threshold can be set on the pressure sensor 2. When the actual pressure reaches the threshold, subsequent related devices can be activated. The pressure sensor 2 is connected to an electric ball valve 3. The other end of the electric ball valve 3 is connected to an input safety unit. The input safety unit includes an inlet pressure gauge 5 for monitoring the suction side pressure. The other end of the inlet pressure gauge 5 is connected to an inlet metal hose 6 for absorbing vibrations during operation. The other end of the inlet metal hose 6 is connected to an inlet reducer 7 for adjusting the pipe diameter difference between the first antifreeze recovery pipeline 1 and the inlet of the antifreeze recovery and replenishment pump 8. The other end of the inlet reducer 7 is connected to the antifreeze recovery and replenishment pump 8.

[0024] The antifreeze recovery and replenishment pump 8 is installed on the ground, and the other end of the antifreeze recovery and replenishment pump 8 is connected to an output safety unit. The output safety unit includes an outlet reducer 9, which is used to adjust the difference in pipe diameter between the first antifreeze recovery pipeline 1 and the outlet of the antifreeze recovery and replenishment pump 8. The other end of the outlet reducer 9 is connected to an outlet metal hose 10, which is used to isolate the vibration transmitted to the outlet side when the antifreeze recovery and replenishment pump 8 is working. The other end of the outlet metal hose 10 is connected to an outlet pressure gauge 11, which is used to monitor the pressure on the output side. The other end of the outlet pressure gauge 11 is connected to a check valve 12, which is used to ensure unidirectional flow of coolant.

[0025] The second antifreeze recovery line 13 is located between the pressure sensor 2 and the electric ball valve 3, and a second manual ball valve 14 is installed on the second antifreeze recovery line 13.

[0026] The third antifreeze recovery line 16 is installed on the second antifreeze recovery line 13, and a pressure relief valve 15 is installed on the third antifreeze recovery line 16. The pressure relief valve 15 can be set with its opening pressure and reseating pressure. When the actual pressure reaches the opening pressure, the pressure relief valve 15 opens, and when the actual pressure decreases to the reseating pressure, the pressure relief valve 15 closes.

[0027] The replenishment pipeline is located between the electric ball valve 3 and the inlet pressure gauge 5. A first manual ball valve 4 is installed on the replenishment pipeline, and the other end of the first manual ball valve 4 is connected to the replenishment port 18.

[0028] The first antifreeze recovery line 1, the second antifreeze recovery line 13, and the third antifreeze recovery line 16 are connected in parallel to the antifreeze recovery and replenishment tank 19.

[0029] The antifreeze recovery and replenishment pump 8, the first manual ball valve 4, the second manual ball valve 14, and the electric ball valve 3 are all normally closed and can be opened manually or automatically only when corresponding operations are required.

[0030] Based on the above, this utility model can achieve three modes: passive recycling, self-controlled active recycling, and manual recycling. Passive recovery: By setting the opening pressure and reseating pressure of the pressure relief valve 15, when the actual pressure is greater than the set opening pressure value, the pressure relief valve 15 automatically opens. At this time, the antifreeze flows out from the solar collector 17 and flows sequentially through the first antifreeze recovery pipeline 1, pressure sensor 2, second antifreeze recovery pipeline 13, pressure relief valve 15 and third antifreeze recovery pipeline 16, and flows into the antifreeze recovery replenishment tank 19. The pressure decreases at the same time as the recovery is completed. When the actual pressure decreases to the set reseating pressure, the pressure relief valve 15 closes.

[0031] Automatic recovery is set via automatic control: Pressure sensor 2 is set to a pressure value; when the actual pressure reaches the set value, electric ball valve 3 and antifreeze recovery and replenishment pump 8 are activated. Alternatively, the recovery time can be set automatically. For example, assuming July 1st to August 31st is summer vacation, and antifreeze needs to be recovered during this period, the electric ball valve 3 and antifreeze recovery and replenishment pump 8 can be activated automatically at 0:00 on July 1st.

[0032] When the electric ball valve 3 and the antifreeze recovery and replenishment pump 8 are opened, antifreeze flows out from the solar collector 17 and, powered by the antifreeze recovery and replenishment pump 8, flows through the first antifreeze recovery pipeline 1 into the antifreeze recovery and replenishment tank 19. When the pressure sensor 2 detects that the real-time pressure has dropped to the pressure relief value, the electric ball valve 3 and the antifreeze recovery and replenishment pump 8 are closed, completing the recovery process.

[0033] In this embodiment, the device includes an antifreeze recovery and replenishment pump 8, primarily used when both the solar collector 17 and the antifreeze recovery device are installed on the ground or at similar elevations. If the installation elevation of the solar collector 17 is higher than that of the antifreeze recovery device, the input safety unit, antifreeze recovery and replenishment pump 8, output safety unit, and check valve 12 are unnecessary; instead, the antifreeze can be recovered directly using the elevation difference. A separate replenishment pump is used to connect to the replenishment port 18 for replenishing the antifreeze system.

[0034] Manual recovery: When the equipment is powered off, the automatic recovery function fails to work, or the actual pressure does not reach the opening pressure set by the pressure relief valve 15, and antifreeze needs to be recovered, the second manual ball valve 14 can be manually opened. At this time, antifreeze flows out from the solar collector 17, flows through the first antifreeze recovery pipeline 1, pressure sensor 2, the second antifreeze recovery pipeline 13 and the second manual ball valve 14, and flows into the antifreeze recovery replenishment tank 19, thus completing the antifreeze recovery.

[0035] In addition, when it is necessary to add antifreeze to the antifreeze recovery and replenishment tank 19, since the antifreeze recovery and replenishment pump 8 is a water pump with a certain suction head, a hose can be connected to the replenishment port 18, the first manual ball valve 4 and the antifreeze recovery and replenishment pump 8 can be opened, and the second manual ball valve and the electric ball valve 3 can be kept closed, so that the replenishment can be completed by the antifreeze recovery and replenishment pump 8.

[0036] Therefore, this utility model adopts the above-mentioned antifreeze recovery device for solar collectors, which adds an automatic active recovery mode and a manual recovery mode on the basis of the commonly used passive antifreeze recovery, and can make corresponding selections and adjustments according to the actual situation.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A solar collector antifreeze recovery device, wherein the inlet end is connected to a solar collector and the outlet end is connected to an antifreeze recovery and replenishment tank, characterized in that: Includes recovery piping, input safety unit, antifreeze recovery and replenishment pump, output safety unit, and piping valve device; The input safety unit, antifreeze recovery and replenishment pump, output safety unit, and pipeline valve device are all installed on the recovery pipeline; the input safety unit is connected to the front end of the antifreeze recovery and replenishment pump, and the output safety unit is connected to the rear end of the antifreeze recovery and replenishment pump; the pipeline valve device includes an electric ball valve, a first manual ball valve, a check valve, a second manual ball valve, and a pressure relief valve.

2. The antifreeze recovery device for a solar collector according to claim 1, characterized in that: The recovery pipeline includes a first antifreeze recovery pipeline, a second antifreeze recovery pipeline, a third antifreeze recovery pipeline, and a replenishment pipeline; the solar collector is connected to the first antifreeze recovery pipeline, a pressure sensor is installed on the first antifreeze recovery pipeline, the pressure sensor is connected to an electric ball valve, the other end of the electric ball valve is connected to an input safety unit, the input safety unit includes an inlet pressure gauge, the other end of the inlet pressure gauge is connected to an inlet metal hose, the other end of the inlet metal hose is connected to an inlet reducer, and the other end of the inlet reducer is connected to the antifreeze recovery and replenishment pump.

3. The antifreeze recovery device for a solar collector according to claim 2, characterized in that: The other end of the antifreeze recovery and replenishment pump is connected to the output safety unit, which includes an outlet reducer. The other end of the outlet reducer is connected to an outlet metal hose, the other end of the outlet metal hose is connected to an outlet pressure gauge, and the other end of the outlet pressure gauge is connected to a check valve.

4. The antifreeze recovery device for a solar collector according to claim 2, characterized in that: The second antifreeze recovery line is located between the pressure sensor and the electric ball valve, and a second manual ball valve is installed on the second antifreeze recovery line.

5. A solar collector antifreeze recovery device according to claim 2, characterized in that: The third antifreeze recovery line is located on the second antifreeze recovery line, and a pressure relief valve is installed on the third antifreeze recovery line.

6. A solar collector antifreeze recovery device according to claim 2, characterized in that: The replenishment pipeline is located between the electric ball valve and the inlet pressure gauge. A first manual ball valve is installed on the replenishment pipeline, and the other end of the first manual ball valve is connected to the replenishment port.

7. A solar collector antifreeze recovery device according to claim 2, characterized in that: The first antifreeze recovery line, the second antifreeze recovery line, and the third antifreeze recovery line are connected to the antifreeze recovery and replenishment tank in parallel.

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