Heat energy recovery system

Abstract

The utility model discloses a heat energy recovery system in the technical field of waste heat recovery devices, which comprises a waste hot water collection container and a tank body, and further comprises a water flow switch connected through an electric signal and a sealer used for controlling the conduction of the waste hot water pipe between the waste hot water collection container and the tank body, the tank body is provided with a waste water drainage pipe and a heat exchange pipe, and the heat exchange pipe is provided with a water inlet and a water outlet. According to the scheme, waste hot water cannot be wasted, and therefore the purposes of full heat energy recovery, high efficiency and energy saving are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery devices, in particular to a heat energy recovery system. Background Art

[0002] Waste heat refers to the sensible heat and latent heat that has not been reasonably utilized in the original design of energy-consuming devices of industrial enterprises that have been put into operation due to limitations of historical, technological, and conceptual factors. It includes waste heat from high-temperature exhaust gas, waste heat from cooling media, waste heat from waste steam and waste water, waste heat from high-temperature products and slag, waste heat from chemical reactions, and waste heat from combustible exhaust gas, waste liquid, and waste materials.

[0003] As people's living standards improve, hot water is used more and more widely, such as domestic water: water for washing vegetables in the kitchen, washing hands and feet in the bathroom, shower, washing machine, bathtub, etc. In actual use, in order to meet the use requirements, water needs a lot of energy to heat to the required temperature, but the actual effective heat energy is used less. For example, when people take a bath, taking Guizhou as an example, the tap water temperature in winter is 2-5℃, the tap water temperature in summer is 15-19℃, and the temperature of bath water is between 40-44℃, and the actual heat utilization rate of shower water is only 30%. More heat energy is discharged with domestic wastewater, wasting a lot of energy and increasing the greenhouse effect.

[0004] To this end, the inventor has previously applied for a heat recovery plate (application number 2021231059844), including a heat absorption plate and a heat absorption tube arranged inside the heat absorption plate. When the waste hot water passes through the heat absorption plate, the heat is indirectly transferred to the heat absorption tube, but this indirect heat transfer method obviously reduces the heat transfer efficiency; and, there are abundant sources of external waste hot water, such as domestic waste hot water and industrial waste hot water. When there is no demand for hot water, the heat absorption tube does not pass into the tap water to be heated, and these external waste hot water cannot be collected. The waste hot water flows through the heat absorption plate without being heated, resulting in waste. Utility Model Content

[0005] The utility model aims to provide a heat energy recovery system, so as to provide a recovery system which collects waste hot water and performs heat exchange with the waste hot water when there is a demand for hot water.

[0006] In order to achieve the above object, the utility model provides the following technical solutions:

[0007] A heat recovery system comprises a waste hot water collection container and a tank body, a waste hot water pipe is connected between the waste hot water collection container and the tank body, and also comprises a water flow switch connected by an electrical signal and a closure for controlling the conduction of the waste hot water pipe, the tank body is provided with a waste water drainage pipe and a heat exchange pipe, and the heat exchange pipe is provided with a water inlet and a water outlet.

[0008] The working principle and beneficial effects of the utility model:

[0009] In this solution, the water flow switch is arranged in the water outlet pipe of the water-using equipment, such as the water outlet pipe of the water heater. When hot water is used, the hot water flows out through the water outlet pipe, and the water flow switch monitors the flow of water inside the water pipe. The water flow switch and the closure device are electrically connected, and the water flow switch controls the closure device to open. If the water outlet pipe of the water heater is closed, it means that there is no demand for hot water. The water flow switch monitors that the water flow in the water outlet pipe is not flowing, and the water flow switch controls the closure device to close.

[0010] Waste hot water from the outside is collected in a waste hot water collection container. When hot water is needed, the water flow switch controls the closure to open, and the waste hot water flows into the tank through the waste hot water pipe. Tap water is introduced through the water inlet of the heat exchange tube, and the water outlet is connected to the water inlet pipe of the water-using equipment. The waste hot water heats the tap water in the heat exchange tube and then is discharged from the waste water drain pipe. The heated tap water enters the water-using equipment, and a small amount of energy is used to reheat the tap water to the required temperature.

[0011] This solution directly passes the waste hot water into the tank body, and the heat exchange tube is located inside the tank body. Therefore, the waste hot water directly heats the heat exchange tube, which can improve the heat exchange efficiency. In addition, this solution is equipped with a waste hot water collection container, a water flow switch and a closure. When there is no demand for hot water, the waste hot water is stored or collected. When there is a demand for hot water, the waste hot water is exchanged with the tap water to be heated to collect the surplus energy. Therefore, the waste hot water will not be wasted, thereby achieving the purpose of full heat recovery, high efficiency and energy saving.

[0012] Furthermore, the bottom of the tank body is tilted downward toward the waste water drain pipe, so that the waste hot water in the tank body can be completely drained to prevent the waste hot water from being retained.

[0013] Furthermore, the tank body is provided with a fixed bracket, and the heat exchange tubes are connected to the fixed bracket and are distributed in a serpentine shape. The serpentine shape can increase the heat exchange area with the waste hot water and improve the heat exchange efficiency.

[0014] Furthermore, the trough body is symmetrically fixed with guide plates for isolating the waste hot water pipe and the waste water drainage pipe from the heat exchange pipe, and the guide plates are provided with multiple guide hole groups covering the heat exchange pipe, and each guide hole group includes multiple guide holes arranged at intervals.

[0015] The guide plate blocks the waste hot water entering from the waste hot water pipe. The waste hot water accumulates in the space between the guide plate and the water tank, and then disperses through the heat exchange tube through multiple guide holes, and then flows into the waste water drain pipe through multiple guide holes on the guide plate on the other side and is discharged. The heat of the waste hot water is transferred to the heat exchange tube.

[0016] The multiple guide holes of the guide plate on one side play the role of diverting the waste hot water, so that the waste hot water is evenly distributed and can cover the entire heat exchange tube, thereby increasing the heat exchange area, while the multiple guide holes of the guide plate on the other side can slow down the speed at which the waste hot water is discharged outward, thereby extending the heat exchange time between the waste hot water and the heat exchange tube.

[0017] Furthermore, the tank body and the waste hot water collection container are both provided with a heat insulation layer, which can slow down the speed of heat transfer to the outside and play a role in heat preservation.

[0018] Furthermore, the water inlet and the water outlet are coaxially rotatably connected with a movable nut. The external water pipe is provided with an external threaded nut used in conjunction with the movable nut, and the external threaded nut is screwed into the movable nut to achieve quick installation.

[0019] Furthermore, the closure device is specifically a solenoid valve or a water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a cross-sectional view of a top view of a heat recovery system in Example 1;

[0021] Figure 2 This is a schematic diagram of the internal structure of a heat recovery system in Example 2. DETAILED DESCRIPTION

[0022] The following is further described in detail through specific implementation methods:

[0023] The figure marks in the drawings of the specification include: wastewater drainage pipe 1, heat exchange tube 2, water inlet 3, waste hot water pipe 4, waste hot water collection container 5, hot water pipeline 6, water flow switch 7, water heater 8, solenoid valve 9, guide hole 10, trough body 11, guide plate 12, water outlet 13, and movable nut 14.

[0024] In the following statements, directional words such as "left", "right", "up", and "down" are all based on the directions shown in the diagram. In practice, if the corresponding structures are changed in the same direction based on the directions while keeping the relative positions unchanged, it will not affect the implementation of the plan.

[0025] Embodiment 1: A heat recovery system includes a water flow switch 7, a solenoid valve 9 and a power supply connected to each other via an electrical signal (i.e., a closed series circuit is formed between the water flow switch 7, the solenoid valve 9 and the power supply). The water flow switch 7 is used to monitor the flow of water so as to control the opening or closing of the solenoid valve 9; Figure 1As shown, it also includes a waste hot water collection container 5 and a tank body 11, a waste hot water pipe 4 is fixedly connected between the waste hot water collection container 5 and the tank body 11, a solenoid valve 9 is fixedly arranged in the waste hot water pipe 4, a waste water drainage pipe 1 and a heat exchange pipe 2 are fixedly arranged in the tank body 11, the heat exchange pipe 2 is provided with a water inlet 3 and a water outlet 13, and the waste hot water collection container 5 adopts an insulation barrel, insulation box, etc. that are insulated and heat-preserved using insulation materials.

[0026] In addition, the trough body 11 is also fixedly provided with a guide plate 12 for isolating the waste hot water pipe 4 and the waste water drainage pipe 1 from the heat exchange tube 2. The guide plate 12 is provided with a plurality of guide hole groups covering the heat exchange tube 2, and each guide hole group includes a plurality of guide holes 10 evenly spaced.

[0027] In the present solution, the water flow switch 7 is arranged in the hot water pipe 6 of the water-using equipment, for example, in the hot water pipe 6 of the water heater 8. When hot water is used, the hot water is discharged through the hot water pipe 6, and the water flow switch 7 monitors the water flow inside the hot water pipe 6. The water flow switch 7 and the solenoid valve 9 are electrically connected, and the water flow switch 7 controls the solenoid valve 9 to open. If the hot water pipe 6 of the water heater 8 is closed, it means that there is no demand for hot water. The water flow switch 7 monitors that the water flow in the hot water pipe 6 is not flowing, and the water flow switch 7 automatically controls the solenoid valve 9 to close.

[0028] The waste hot water from the outside is collected in the waste hot water collection container 5. When hot water is needed, the water flow switch 7 controls the solenoid valve 9 to open, and the waste hot water flows into the tank body 11 through the waste hot water pipe 4. The tap water is introduced through the water inlet 3, and the outlet 13 of the heat exchange tube 2 is connected to the water inlet pipe of the water heater 8. The guide plate 12 on the right side blocks the waste hot water entering from the waste hot water pipe 4. The waste hot water accumulates in the space between the right guide plate 12 and the water tank, and then disperses the flow path of the heat exchange tube 2 through multiple guide holes 10, and then flows into the waste water drain pipe 1 through multiple guide holes 10 on the other side of the guide plate 12 for discharge. The heat of the waste hot water is transferred to the heat exchange tube 2, and the tap water in the heat exchange tube 2 after heating enters the water inlet pipe of the water heater 8 through the water outlet 13.

[0029] In this solution, the waste hot water is directly introduced into the tank body 11, and the heat exchange tube 2 is located inside the tank body 11, so the waste hot water directly heats the heat exchange tube 2, which can improve the heat exchange efficiency; and, in this solution, a waste hot water collection container 5, a water flow switch 7 and a solenoid valve 9 are provided. When there is no demand for hot water, the waste hot water is collected. When there is a demand for hot water, the waste hot water is exchanged with the tap water in the heat exchange tube 2 to be heated to collect the residual energy, so that the waste hot water will not be wasted, thereby achieving the purpose of full heat recovery, high efficiency and energy saving.

[0030] The water flow switch 7 is used for water circulation control, water inlet and outlet control, water heating control, water pump switch control, solenoid valve 9 on-off control or water outlet power-off and water outlet power-on control of electric water heaters, solar water heaters, air conditioners and other water systems. When a certain flow rate is reached, the water flow is converted into a switch-type electrical signal as a sensor device (see Baidu Encyclopedia). In this solution, the water flow switch 7 uses a DC 24V water flow switch 7, the solenoid valve 9 uses a 24v solenoid valve 9, and the power supply uses a 24v DC safety power supply (battery).

[0031] Embodiment 2: The difference from embodiment 1 is that Figure 2 The water inlet 3 and the water outlet 13 are coaxially connected with a movable nut 14. The external water pipe is provided with an external thread nut used in conjunction with the internal thread of the movable nut 14, and the external thread nut is screwed into the movable nut 14 to achieve quick installation.

[0032] Embodiment 3: The difference from Embodiment 1 is that: the closure adopts a water pump, and the principle of the water flow switch 7 controlling the water pump is the same as the principle of the water flow switch 7 controlling the solenoid valve 9. In addition, the water pump is a conventional component, and its working principle and specific structure are no longer repeated. That is, the water pump works to draw the waste hot water in the waste hot water collection container 5 into the waste hot water pipe 4. The water pump can draw the low-level waste hot water into the high-level tank body 11, thereby improving the usage scenario.

[0033] The standard parts used in the utility model can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

Claims

1. A heat recovery system, characterized in that: It includes a waste hot water collection container and a tank body, a waste hot water pipe is connected between the waste hot water collection container and the tank body, and also includes a water flow switch connected by electrical signals and a closure for controlling the conduction of the waste hot water pipe. The tank body is provided with a waste water drainage pipe and a heat exchange pipe, and the heat exchange pipe is provided with a water inlet and a water outlet.

2. A heat recovery system according to claim 1, characterized in that: The bottom of the tank body is inclined downward toward the wastewater drainage pipe.

3. A heat recovery system according to claim 2, characterized in that: The tank body is provided with a fixed bracket, and the heat exchange tubes are connected to the fixed bracket and distributed in a serpentine shape.

4. A heat recovery system according to claim 3, characterized in that: The trough body is also symmetrically fixed with guide plates for isolating the waste hot water pipe and the waste water drainage pipe from the heat exchange pipe. The guide plates are provided with a plurality of guide hole groups covering the heat exchange pipe, and each guide hole group includes a plurality of guide holes arranged at intervals.

5. A heat recovery system according to claim 4, characterized in that: The tank body and the waste hot water collection container are both provided with a heat insulation layer.

6. A heat recovery system according to claim 5, characterized in that: The water inlet and the water outlet are coaxially rotatably connected with a movable nut.

7. A heat recovery system according to claim 6, characterized in that: The closure device is specifically a solenoid valve or a water pump.

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