Hot water waste heat recycling device for water heating bathroom

Abstract

The hot water waste heat recycling device comprises a heat preservation box, a cold water inlet mechanism, a waste heat water inlet mechanism and the like, and is mainly characterized in that a vacuum heat insulation plate and a glass fiber plate are arranged on the inner surface and the outer surface of the heat preservation box respectively, and a heat absorption water tank wrapped by heat exchange pieces is arranged in the heat preservation box; the cold water inlet mechanism is connected with the heat absorption water tank and inputs cold water, and the waste heat water inlet mechanism is connected with the input end of the heat exchange sheet; therefore, the waste heat water used after the water heating bathroom is input into the heat exchange sheet through the waste heat water inlet mechanism for heat exchange, cold water in the heat absorption water tank can be heated into hot water, the waste heat water subjected to heat exchange can be discharged through the drain pipe of the heat exchange sheet, and the hot water in the heat absorption water tank is output through the output pipe of the heat absorption water tank for use. Obviously, due to the fact that the heat absorption water tank and the heat exchange pieces form a multi-wrapping isolation structure, the heat insulation performance is improved, the heat exchange area is increased, sufficient heat transfer is guaranteed, and the hot water waste heat recovery effect is improved.

Description

Technical Field

[0001] The invention relates to a recycling device, in particular to a hot water waste heat recycling device for water heating bathrooms in the technical field of bathroom equipment. Background Art

[0002] In today's society, with the increasing prominence of energy shortage problems and people's increasing awareness of energy conservation and emission reduction, improving energy efficiency has become an important research direction in various fields. As an indispensable part of modern buildings, plumbing and sanitary systems consume a lot of energy in daily life, among which the energy consumption involved in hot water supply accounts for a considerable proportion.

[0003] With the increasingly severe energy shortage problem and the continuous improvement of people's awareness of energy conservation and environmental protection, how to improve energy utilization efficiency has become the focus of attention in various fields. In the field of water heating and sanitary ware, the recycling of waste heat from hot water has significant economic and environmental benefits. On the one hand, recycling waste heat can reduce the consumption of traditional energy such as electricity and gas, and reduce energy costs. Especially for large buildings or places with large demand for hot water, the energy-saving effect is more obvious; on the other hand, reducing energy consumption means reducing environmental pollution such as greenhouse gas emissions, which helps to promote the implementation of sustainable development strategies. In modern life, water heating and sanitary ware systems are widely used in homes, hotels, commercial buildings and other places to provide people with comfortable hot water supply. However, in the process of using hot water, a large amount of waste heat in traditional water heating and sanitary ware devices is not effectively recycled. When hot water flows through terminal equipment such as faucets and showers, it is usually directly discharged into the sewer. The energy contained in these waste waters carrying considerable heat is lost in vain, which not only causes a great waste of energy and increases the energy cost expenditure of users, but also does not conform to the current environmental protection concept of sustainable development.

[0004] However, there are still many problems with the existing waste heat recovery and utilization devices. For example, when recovering the waste heat of hot water, the main body of the equipment such as the insulated box storing hot water is often directly exposed to the external environment, and the surface is not equipped with any heat insulation protection device, which makes it very easy for the heat to be lost through heat conduction between the surface of the device and the outside air; at the same time, the waste heat utilization mainly adopts the structural method of heat exchange by heat exchange elements, but the heat exchange area of ​​these heat exchange structures is small, resulting in insufficient heat transfer, thereby greatly reducing the effect of hot water waste heat recovery, so it is impossible to achieve the expected energy recovery goal, resulting in energy waste and inefficient utilization. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a hot water waste heat recovery device for water heating and sanitary ware with good thermal insulation performance, large heat exchange area, sufficient heat transfer and better hot water waste heat recovery effect.

[0006] The technical problem of the present invention is achieved through the following technical solutions: A device for recovering and utilizing waste heat of hot water for plumbing and sanitary ware comprises a heat preservation box, a cold water inlet mechanism and a waste hot water inlet mechanism, wherein a vacuum insulation panel is arranged on the inner surface of the heat preservation box, a glass fiber panel is arranged on the outer surface of the heat preservation box, a heat absorption water tank and a heat exchange plate wrapping the heat absorption water tank are arranged in the heat preservation box; the cold water inlet mechanism is connected to the heat absorption water tank and inputs cold water, and an output pipe is arranged on the heat absorption water tank; the waste hot water inlet mechanism is connected to the input end of the heat exchange plate, and a drain pipe is arranged on the output end of the heat exchange plate; the waste hot water inlet mechanism inputs waste hot water into the heat exchange plate for heat exchange, thereby heating the cold water in the heat absorption water tank into hot water, the waste hot water after the heat exchange is discharged through the drain pipe, and the hot water in the heat absorption water tank is output through the output pipe for use.

[0007] The cold water inlet mechanism comprises a cold water chamber, and a water outlet pipe and a water inlet pipe respectively connected to the cold water chamber. The water outlet pipe is connected to a cold water pump, and the cold water pump is connected to a heat absorption water tank via a hose and inputs cold water.

[0008] The waste hot water inlet mechanism comprises a hot water pipe connected to the input end of the heat exchange plate and inputting the waste hot water, and the hot water pipe is connected to a hot water pump.

[0009] The cold water chamber is provided with a pressure gauge and a handle.

[0010] The water inlet pipe is provided with a control valve.

[0011] The hot water pipe is provided with a thermometer and an observation window.

[0012] The output pipe and the drain pipe are both provided with opening and closing valves.

[0013] The top of the heat absorption water tank is open and provided with a detachable and closed top cover, the top cover is provided with a mounting hole for connecting and installing the hose, and the bottom side of the heat absorption water tank is provided with an output pipe, which passes through the insulation box and is exposed.

[0014] A placement plate is provided at the bottom of the thermal insulation box, and a fastening hole and a fastening column installed in coordination with the fastening hole are provided on the placement plate.

[0015] The top of the heat preservation box is open and is provided with a detachable and closed heat-insulating cover.

[0016] Compared with the prior art, the present invention mainly arranges a vacuum insulation board on the inner surface of the insulation box, arranges a glass fiber board on the outer surface of the insulation box, and arranges a heat absorption tank and a heat exchange plate wrapping the heat absorption tank in the insulation box; then the cold water inlet mechanism is connected to the heat absorption tank and cold water is input, the heat absorption tank is provided with an output pipe, and the waste hot water inlet mechanism is connected to the input end of the heat exchange plate, and the output end of the heat exchange plate is provided with a drain pipe; in this way, the cold water in the heat absorption tank can be heated into hot water by inputting waste hot water after use in the water heating and bathroom into the heat exchange plate through the waste hot water inlet mechanism for heat exchange, and the waste hot water after the heat exchange can be discharged through the drain pipe, and the hot water in the heat absorption tank can be output through the output pipe for use. Obviously, since the heat absorption tank is wrapped in the heat exchange plate and then arranged together in an insulation box with an internal vacuum insulation board and an external fiberglass board, that is, the heat absorption tank for storing hot water and the heat exchange plate for heat exchange are no longer directly exposed to the outside world, but are multi-wrapped and isolated, it can effectively block the transfer of heat through conduction, convection and the like, greatly reducing the rate of heat loss from the inside of the device to the outside, ensuring that the heat in the insulation box can be used for waste heat recovery as much as possible, especially with the help of the setting of the fiberglass board, the thermal insulation performance of the insulation box is further enhanced. This is because the glass fiber itself has many tiny air gaps and is a poor conductor of heat. It can help prevent the heat exchange between the external environment and the inside of the device, so that the inside of the device can maintain a relatively stable temperature environment; at the same time, the heat absorption tank is wrapped by the heat exchange plate to increase the heat exchange area, making the heat transfer more sufficient, thereby improving the recovery effect of the hot water waste heat, and can achieve the expected energy recovery goals, as well as reduce energy waste and efficient utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 for Figure 1 Schematic diagram of the structure with the cold water inlet mechanism removed and the insulation cover opened.

[0019] Figure 3 This is a schematic diagram of the structure of the thermal insulation box (with the thermal insulation cover open).

[0020] Figure 4 This is a schematic diagram of the structure of the heat absorption water tank (with the top cover open).

[0021] Figure 5 It is a schematic diagram of the structure of the heat exchanger.

[0022] Figure 6 It is a structural schematic diagram of the cold water inlet mechanism.

[0023] Figure 7 It is a structural diagram of the waste hot water inlet mechanism. DETAILED DESCRIPTION

[0024] The embodiments of the present invention will be described in detail below with reference to the above-mentioned drawings.

[0025] like Figure 1 to Figure 7 As shown, 1. insulation box, 11. vacuum insulation board, 12. fiberglass board, 2. cold water inlet mechanism, 21. cold water chamber, 211. pressure gauge, 212. handle, 22. outlet pipe, 23. inlet pipe, 231. control valve, 24. cold water pump, 25. hose, 3. waste hot water inlet mechanism, 31. hot water pipe, 32. hot water pump, 33. observation window, 4. insulation cover, 5. placement plate, 51. fastening hole, 52. fastening column, 6. thermometer, 7. heat exchange plate, 71. flange joint, 72. drain pipe, 8. hot water absorption tank, 81. water cavity, 82. output pipe, 9. top cover, 91. installation hole, 10. opening and closing valve.

[0026] A device for recycling waste heat from hot water used in water heating and sanitary ware, such as Figure 1 As shown, it belongs to the technical field of bathroom equipment, and its structure includes an insulation box 1, a cold water inlet mechanism 2 and a waste hot water inlet mechanism 3, etc.

[0027] The insulation box 1 is a rectangular box, the inner surface of which is provided with a vacuum insulation board 11, the outer surface of which is provided with a glass fiber board 12, the top of which is open and into which a heat absorption tank 8 and a heat exchange plate 7 wrapping the heat absorption tank are installed, and then the box is enclosed by a detachable insulation cover 5 covering the top opening.

[0028] The vacuum insulation panel 11 is laid and fixed on the inner surface of the insulation box 1, so that a vacuum environment is formed inside the insulation box, which can effectively block the heat in the insulation box from being transferred through conduction, convection, etc., thereby greatly reducing the speed of heat loss from the inside of the insulation box 1 to the outside, so that the heat in the insulation box can be used as much as possible for waste heat recovery.

[0029] The glass fiber board 12 is laid and fixed on the outer surface of the insulation box 1. Since the glass fiber itself has many tiny air gaps and is a poor conductor of heat, it can help prevent heat exchange between the external environment and the inside of the insulation box, so that the inside of the insulation box can maintain a relatively stable temperature environment. With the help of the insulation cover 4, the heat loss from the open top of the insulation box 1 can be minimized, thereby further enhancing the insulation performance of the insulation box.

[0030] A placement plate 5 is provided at the bottom of the insulated box 1. In the present embodiment, placement plates are provided at both ends of the length of the bottom of the insulated box, and the placement plates 5 at both ends are parallel to each other, and fastening holes 51 and fastening columns 52 for threaded installation formed by matching the fastening holes are provided at both ends of each placement plate 5; in this way, with the help of the placement plates 5, the insulated box 1 can be supported and installed and fixed to ensure that the insulated box can always be in a stable state during use, to prevent displacement or shaking due to external forces and other factors, and to avoid affecting the stable operation of the entire recycling device and the waste heat recovery effect.

[0031] The hot water absorption tank 8 is a rectangular water tank, the top of which is open and provided with a detachable and closed top cover 9, and a mounting hole 91 is also provided on the top cover; a plurality of water cavities 81 are provided in the hot water absorption tank 8, and cold water is usually injected into the plurality of water cavities 81 at the same time through the mounting holes 91 on the top cover 9.

[0032] The bottom side of the heat absorption water tank 8 is provided with a plurality of output pipes 82, which are connected to the plurality of water chambers 81 one by one, and the plurality of output pipes are combined to discharge water. Figure 4 As shown, two water chambers 81 are provided, and two corresponding output pipes 82 are provided on the bottom side of the heat absorption tank 8, and the two output pipes are combined together and pass through the insulation box 1 to be exposed to the outside for the hot water after heat exchange heating to be output for use. An opening and closing valve 10 can be provided on each output pipe 82 to realize opening and closing.

[0033] The cold water inlet mechanism 2 comprises a cold water chamber 21, and a water outlet pipe 22 flange-connected to the top of the cold water chamber and a water inlet pipe 23 threadedly connected to the bottom of the cold water chamber.

[0034] The cold water chamber 21 is mainly used to store cold water. It is the core container of the entire cold water inlet mechanism 2. A pressure gauge 211 for detection is provided on the cold water chamber 21, which can more conveniently detect the pressure in the cold water chamber 21 to avoid safety hazards caused by excessive pressure in the cold water chamber. A handle 212 for holding is also provided.

[0035] The water inlet pipe 23 is provided with a detachably connected control valve 231, and the control valve is used to control the opening and closing of the water inlet, that is, the flow rate and timing of the cold water inlet can be more conveniently controlled, so as to effectively control the water inlet amount in the cold water chamber 21.

[0036] The water outlet pipe 22 is threadedly connected to a cold water pump 24. A detachably connected thermometer 6 for detecting temperature is provided on the water outlet pipe 22, which can be used to detect the temperature of the cold water transported in the water outlet pipe 22 in real time. The cold water pump 24 is connected to the hot water absorption tank 8 and inputs cold water via a threaded hose 25. Specifically, after the end of the hose 25 passes through the insulation cover 4, it is threadedly tightened and sealed with the mounting hole 91 on the top cover 9, so that cold water can be injected into several water chambers 81 of the hot water absorption tank 8 at the same time.

[0037] The cold water pump 24 can provide power for cold water to enter the hot water absorption tank 8 from the cold water chamber 21, ensuring that the cold water can smoothly enter the several water chambers 81 of the hot water absorption tank 8 through the hose 25 and other components, and can also cooperate with the hot water pump 32 in the waste hot water inlet mechanism 3 to realize the reasonable circulation and allocation of cold and hot water in the entire recycling device.

[0038] In this way, by setting up the cold water inlet mechanism 2 to replenish cold water into the hot water absorption tank 8, it is ensured that there is always enough cold water in the hot water absorption tank to absorb the waste heat of hot water, thereby ensuring the continuous implementation of the waste heat recovery and utilization work.

[0039] The heat exchanger plate 7 is made of multiple independent and interconnected rectangular plates, and is usually designed to be detachable for easy cleaning and maintenance. When the waste hot water used in the plumbing and bathroom flows through multiple rectangular heat exchanger plates 7 in sequence, it can ensure that the heat in the waste hot water is fully exchanged. Combined with the insulation box 1 outside the heat exchanger plate, it can better slow down the heat loss and maintain the heat exchange temperature, so that the heat exchange can achieve an ideal effect.

[0040] The waste hot water inlet mechanism 3 is connected to the input end of the heat exchange plate 7, that is, it is connected to the flange joint 71 of the input end of the heat exchange plate. The output end of the heat exchange plate 7 is provided with a threaded drain pipe 72, and the drain pipe passes through the insulation box 1 and is exposed to the outside for the waste hot water that completes the heat exchange to be discharged. Specifically: the waste hot water inlet mechanism 3 inputs waste hot water into the heat exchange plate 7 for heat exchange, so that the cold water in the heat absorption tank 8 can be heated into hot water. The waste hot water after the heat exchange is directly discharged from the drain pipe 72, and the hot water in the heat absorption tank 8 can be output through the output pipe 82 for use.

[0041] The drain pipe 72 is also provided with an on-off valve 10 to realize on-off opening and closing. The outer surface of the on-off valve 10 may be provided with friction patterns for anti-slip.

[0042] The waste hot water inlet mechanism 3 includes a hot water pipe 31 which is threadedly connected to the input end of the heat exchange plate 7 and inputs waste hot water. The hot water pipe flange is connected to a hot water pump 32. A detachable thermometer 6 for detecting the temperature is provided on the hot water pipe 31, which can be used to detect the temperature of the waste hot water transported in the hot water pipe 31 in real time. An observation window 33 is also provided for observation, which can facilitate the operator to directly observe the flow of water inside the hot water pipe 31.

[0043] In this way, by setting up a hot water pump 32, the waste hot water used in the plumbing and bathroom can be more conveniently transported to the heat exchanger 4, and at the same time, it can also provide power for the flow of water in the entire heat exchanger, so that it can overcome the resistance of components such as hot water pipes to the water flow, ensuring that the waste hot water can flow stably inside the heat exchanger 7, thereby forming a continuous and effective heat exchange between the heat exchanger 7 and the heat absorption tank 8, and maintaining the circulating working state of the waste heat recovery and utilization device.

[0044] The specific use process of the hot water waste heat recovery and utilization device for plumbing bathrooms is: confirm that the initial pressure in the cold water chamber is within the normal range through the pressure gauge 211 on the cold water chamber 21. If the amount of water inside is insufficient, cold water can be added to the cold water chamber 21 by opening the control valve 231 on the water inlet pipe 23, so that enough cold water can be stored in the cold water chamber. At the same time, the handle 212 can be used to move the cold water chamber 21 and other components to put them in a suitable placement state.

[0045] Then install the insulation box 1 at a predetermined position and use the fastening holes 51 on the placement plate 5 to cooperate with the fastening columns 52 to install and fix it to prevent the insulation box 1 from being displaced or shaken due to external forces and other factors during subsequent operation, thereby ensuring the stability of the entire recycling device during operation.

[0046] Then, the cold water pump 24 is turned on to provide power for the cold water to enter the hot water absorption tank 8 from the cold water chamber 21, that is, the cold water in the cold water chamber 21 is input into the several water chambers 81 of the hot water absorption tank 8 through the cold water pump 24 through the water outlet pipe 22 and the hose 25 in sequence, so as to prepare the cold water for the subsequent waste heat recovery and utilization; at the same time, the hot water pump 32 is also started to introduce the waste hot water used in the plumbing and sanitary ware into the heat exchange plate 7 to provide a heat source for heat exchange, and the heat of the waste hot water is directly transferred to the wrapped hot water absorption tank 8 to heat the cold water in the water chamber 81, thereby realizing the recovery and utilization of the waste heat of hot water, reducing the heat energy required for heating the cold water inside the plumbing and sanitary ware, and achieving the purpose of saving water resources and heat energy.

[0047] When the cold water in the heat absorption tank 8 absorbs enough heat to form hot water, if the hot water in the heat absorption tank 8 needs to be used, it only needs to open the on-off valve 10 on the output pipe 82 to transport it to other places where hot water is needed as needed, and the residual hot water in the heat exchange plate 7 after heat exchange is directly discharged through the drain pipe 72.

[0048] In addition, the electrical components used in conjunction with the recycling device in this embodiment are all connected to an external main controller and 220V AC power, and the main controller can be a conventional known device such as a computer that plays a control role.

[0049] In the present invention, the heat absorption tank 8 is wrapped in the heat exchange plate 7 and then arranged together in the insulation box 1 with the internal vacuum insulation board 11 and the external glass fiber board 12. That is, the heat absorption tank 8 for storing hot water and the heat exchange plate 7 for heat exchange are no longer directly exposed to the outside world, but are multi-wrapped and isolated, so the thermal insulation performance can be greatly improved; moreover, the heat absorption tank 8 is wrapped by the heat exchange plate 7, which can also increase the heat exchange area, making the heat transfer more sufficient, thereby improving the recovery effect of the waste heat of hot water, and achieving the expected energy recovery goals, as well as reducing energy waste and efficient utilization.

[0050] It should be noted that the terms "include", "comprises" or any other variants in this application are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A device for recycling waste heat from hot water for water heating and sanitary ware, comprising a heat preservation box (1), a cold water inlet mechanism (2) and a waste hot water inlet mechanism (3), characterized in that: The inner surface of the heat preservation box (1) is provided with a vacuum insulation board (11), the outer surface of the heat preservation box (1) is provided with a glass fiber board (12), and the heat preservation box (1) is provided with a heat absorption tank (8) and a heat exchange plate (7) wrapping the heat absorption tank; The cold water inlet mechanism (2) is connected to the heat absorption tank (8) and inputs cold water, and the heat absorption tank (8) is provided with an output pipe (82); the waste hot water inlet mechanism (3) is connected to the input end of the heat exchange plate (7), and the output end of the heat exchange plate (7) is provided with a drain pipe (72); The waste hot water inlet mechanism (3) inputs waste hot water into the heat exchange plate (7) for heat exchange, thereby heating the cold water in the heat absorption tank (8) into hot water. The waste hot water after the heat exchange is discharged through the drain pipe (72), and the hot water in the heat absorption tank (8) is output through the output pipe (82) for use.

2. A device for recovering waste heat from hot water for plumbing and sanitary use according to claim 1, characterized in that The cold water inlet mechanism (2) comprises a cold water chamber (21), and a water outlet pipe (22) and a water inlet pipe (23) respectively connected to the cold water chamber. The water outlet pipe (22) is connected to a cold water pump (24), and the cold water pump is connected to a hot water absorption tank (8) via a hose (25) and inputs cold water.

3. The device for recovering waste heat of hot water for plumbing and sanitary ware according to claim 1 is characterized in that The waste hot water inlet mechanism (3) comprises a hot water pipe (31) connected to the input end of the heat exchange plate (7) and inputting waste hot water, and the hot water pipe is connected to a hot water pump (32).

4. A device for recovering waste heat from hot water for plumbing and sanitary use according to claim 2, characterized in that The cold water chamber (21) is provided with a pressure gauge (211) and a handle (212).

5. The device for recovering waste heat of hot water for plumbing and sanitary ware according to claim 2, characterized in that The water inlet pipe (23) is provided with a control valve (231).

6. The device for recovering waste heat of hot water for plumbing and sanitary ware according to claim 3 is characterized in that The hot water pipe (31) is provided with a thermometer (6) and an observation window (33).

7. The device for recovering waste heat of hot water for plumbing and sanitary ware according to claim 3, characterized in that The output pipe (82) and the drain pipe (72) are both provided with an opening and closing valve (10).

8. The device for recovering waste heat of hot water for plumbing and sanitary ware according to claim 2, characterized in that The top of the heat absorption tank (8) is open and is provided with a detachable and closed top cover (9), the top cover is provided with a mounting hole (91) for connecting and installing the hose (25), and the bottom side of the heat absorption tank (8) is provided with an output pipe (82), which passes through the insulation box (1) and is exposed to the outside.

9. The device for recovering waste heat from hot water for plumbing and sanitary ware according to claim 1, characterized in that The bottom of the thermal insulation box (1) is provided with a placement plate (5), and the placement plate is provided with a fastening hole (51) and a fastening column (52) installed in coordination with the fastening hole.

10. The device for recovering waste heat of hot water for plumbing and sanitary ware according to claim 1, characterized in that The top of the thermal insulation box (1) is open and is provided with a detachable and closed thermal insulation cover (4).

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