A sanitary energy-saving and water-saving system based on prefabricated decoration and its operation method

Abstract

A sanitary energy-saving and water-saving system based on prefabricated decoration and its operation method, the sanitary energy-saving and water-saving system comprises a prefabricated wall panel, a prefabricated ceiling panel, a pipeline area and a shower area installed on a building wall, the pipeline area is provided with a hot water supply pipe, a cold water supply pipe and a wall heat exchange coil, the shower area is provided with a shower head, the shower head is connected with the cold water supply pipe and the hot water supply pipe, the hot water supply pipe and the cold water supply pipe are connected with the wall heat exchange coil, the hot water supply pipe is provided with a switching valve A and a switching valve B above and below the shower head, respectively, the cold water supply pipe is provided with a switching valve C and a switching valve D above and below the shower head, respectively, and a switching valve E is provided between the connection point between the hot water supply pipe and the wall heat exchange coil and the connection point between the cold water supply pipe and the wall heat exchange coil. The present invention also includes an operation method of the sanitary energy-saving and water-saving system. By using the present invention, wall radiation heating can be realized to improve the body temperature and comfort in the bathroom.

Description

Technical Field

[0001] The invention relates to a bathroom energy-saving and water-saving system, in particular to a bathroom energy-saving and water-saving system based on prefabricated decoration and an operation method thereof. Background Art

[0002] Prefabricated decoration is a decoration method that combines and installs factory-produced components on site. It mainly includes dry-type floor (ground), integrated kitchen, integrated bathroom, separation of pipelines and structures, etc.

[0003] The prefabricated floor heating module is the main heating equipment in prefabricated decoration buildings. However, in the prefabricated integrated bathroom, a waterproof chassis needs to be set up, and it is difficult to set the floor heating module on the bathroom floor, so the heating problem of the integrated bathroom is difficult to solve.

[0004] In addition, the following problems exist in both ordinary bathrooms and integrated bathrooms:

[0005] In winter, when users take a bath in the bathroom, the human body is not covered with clothes and requires a higher heating temperature, resulting in higher energy consumption for bathroom heating.

[0006] In winter, when users are bathing in the bathroom, the bathroom exhaust directly discharges the indoor hot air, and introduces low-temperature fresh air from the outside through the exterior window, resulting in indoor heat loss and poor comfort.

[0007] In summer, due to the lack of air conditioning facilities in the bathroom, users feel hot and have poor thermal comfort when using the bathroom.

[0008] The hot water from the bathroom is directly discharged in winter, resulting in heat loss. In addition, the quality of the bathing water is relatively good, and direct discharge also leads to a waste of water resources.

[0009] In areas without heating or in northern areas with centralized heating, during the period of lower temperatures in spring and autumn, when the centralized heating has stopped but bathing still feels cold, the bathroom heater is generally turned on for heating. However, bathroom heaters have many disadvantages and are particularly unsuitable for use by the elderly and children. Among them, the lamp-heated bathroom heater has the following disadvantages: its heating range is relatively small, and uneven hot and cold will occur in larger bathrooms. In addition, the light of the lamp-heated bathroom heater is relatively glaring, which can easily hurt the eyes of the elderly and children. The air-heated bathroom heater also has great disadvantages: unlike the lamp-heated bathroom heater, the air-heated bathroom heater takes a long time to heat up and needs to be preheated before bathing, so it consumes more electricity. In addition, the air-heated bathroom heater will make the body feel cold after taking a bath when sending air, which is also the most uncomfortable part for the elderly and children. It can be seen that there are many problems with using the bathroom heater for heating when bathing in the transition season. Summary of the invention

[0010] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art and provide a bathroom energy-saving and water-saving system based on prefabricated decoration and its operation method which has a simple structure, reliable operation and high heating efficiency in low temperature environment.

[0011] The technical solution adopted by the present invention to solve its technical problems is: a sanitary energy-saving and water-saving system based on assembled decoration and its operation method, comprising an assembled wall panel, an assembled ceiling panel, a pipeline area and a shower area installed on the wall of a building, the pipeline area is provided with a hot water supply pipe, a cold water supply pipe, and a wall heat exchange coil, the shower area is provided with a shower head, the shower head is connected with the cold water supply pipe and the hot water supply pipe, the hot water supply pipe and the cold water supply pipe are connected with the wall heat exchange coil, the hot water supply pipe is above the shower head A switching valve A and a switching valve B are respectively provided below the shower head, a switching valve C and a switching valve D are respectively provided above and below the shower head, and a switching valve E is provided between the connecting point between the hot water supply pipe and the wall heat exchange coil and the connecting point between the cold water supply pipe and the wall heat exchange coil; a heat recovery device connected to the cold water supply pipe is provided above the shower area, a water collecting tank is provided at the bottom of the shower area, and a toilet is also provided in the shower area, one end of the water collecting tank is connected to the wall heat exchange coil, and the other end thereof is connected to the toilet water storage tank.

[0012] Furthermore, the heat recovery device includes a heat recovery exhaust fan and a heat recovery coil, the heat recovery coil is connected to the cold water supply pipe, and a switching valve F and a switching valve G are provided between the heat recovery coil and the cold water supply pipe. The switching valve F is provided on the heat recovery coil, and the switching valve G is provided on the cold water supply pipe.

[0013] Furthermore, a switching valve H is provided between the water collecting tank and the wall heat exchange coil, and a switching valve I is provided between the water collecting tank and the toilet water tank.

[0014] Furthermore, a water receiving pan is provided on the upper part of the water collecting tank, a water pump is provided inside, and an electric drain port is provided at the bottom. The water pump adopts liquid level interlocking control, and when the pump start level is reached, the water pump is started to supply water to the wall heat exchange coil.

[0015] Furthermore, a branch pipe is provided on the cold water supply pipe, the upper end of the branch pipe is connected to the cold water supply pipe, the middle end is connected to the shower head, and the lower end is connected to the wall heat exchange coil.

[0016] Furthermore, a switching valve J is provided between the branch pipe and the shower head, and a switching valve K is provided on the upper part of the branch pipe; the installation position of the switching valve J is directly opposite to the water supply pipe of the shower head.

[0017] Furthermore, the wall heat exchange coils are arranged in parallel in a runway pattern, and an external cold and heat source interface is provided on the wall heat exchange coil. A switching valve L for connecting two adjacent sections of the wall heat exchange coil is provided above the external cold and heat source interface, and a switching valve M is provided between the external cold and heat source interface and the hot water supply pipe.

[0018] Furthermore, there are two external cold and heat source interfaces.

[0019] Furthermore, the assembled ceiling panel is provided with a bathroom heater and a heat recovery exhaust fan, and the outlet of the heat recovery exhaust fan is connected to the heat recovery coil.

[0020] Furthermore, the assembled wall panel is installed on the building wall through a keel, and its material is a calcium silicate decorative panel or other decorative panel with good thermal conductivity.

[0021] The operation method of the bathroom energy-saving and water-saving system based on prefabricated decoration includes the following working conditions:

[0022] (1) The wall heat exchange coil uses an external heat source for heating: In this condition, except for the switching valve E, the other switching valves are closed, and the heating circulating water of the external heat source is supplied to the wall heat exchange coil from the external cold and hot source interface; after the temperature of the wall heat exchange coil increases, the temperature of the assembled wall panel also increases accordingly, and the assembled wall panel conducts convection and radiation heat exchange with the air and other objects in the bathroom, thereby increasing the perceived temperature in the bathroom;

[0023] (2) The wall heat exchange coil 3-3 uses an external cold source to provide cooling: In this condition, except for the switching valve A, the other switching valves are closed, and the cooling circulating water from the external cold source is supplied to the wall heat exchange coil from the external source; after the temperature of the wall heat exchange coil decreases, the temperature of the assembled wall panel also decreases, and the assembled wall panel conducts convection and radiation heat exchange with the air and other objects in the bathroom, reducing the perceived temperature in the bathroom;

[0024] (3) Wall heat exchange coil 3-3 uses cold water for bathing and flushing to supply cooling: In this condition, the shower head is in use, and except for switching valve K, switching valve A, switching valve D, and switching valve F, the other switching valves are closed. The low-temperature tap water from the external tap water pipe enters the cold water supply pipe through the external tap water interface and then enters the wall heat exchange coil for heat exchange. The temperature of the assembled wall panel 1 also decreases accordingly. The assembled wall panel 1 conducts convection and radiation heat exchange with the air and other objects in the bathroom, reducing the perceived temperature in the bathroom. The tap water after heat exchange flows into the cold water supply pipe through the switching valve D to supply water to the shower head;

[0025] (4) Wall heat exchange coil uses cold water from the toilet for cooling: Under this condition, the toilet water tank is short of water. Except for switching valve E, switching valve K, switching valve I, and switching valve F, all switching valves are closed. Low-temperature tap water from the external tap water pipe enters the cold water supply pipe through the external tap water interface and then enters the wall heat exchange coil for heat exchange. The temperature of the assembled wall panel also decreases accordingly. The assembled wall panel conducts convection and radiation heat exchange with the air and other objects in the bathroom, reducing the perceived temperature in the bathroom. After heat exchange, the tap water flows into the toilet water tank through switching valve E and switching valve I to supply water to the toilet.

[0026] (5) Wall heat exchange coils use hot water recycled from bathing to provide heating: Under this condition, the shower head is in use or has been used for no more than 30 minutes. There is water in the water collection tank at the bottom of the shower area, but there is no water in the toilet water tank. Except for switching valve A, switching valve C, switching valve E, switching valve I, switching valve L, and switching valve F, the remaining switching valves are closed; the hot water from the external centralized hot water supply pipe enters the hot water supply pipe through the external hot water source interface, and then enters the shower head and mixes with the cold water for bathing and sprays out, forming bathing wastewater. It is collected in the water collection tank at the bottom of the shower area, and is pressurized by a water pump and sent to the wall heat exchange coil for heat exchange. After the temperature of the wall heat exchange coil increases, the temperature of the assembled wall panel also increases. The assembled wall panel conducts convection and radiation heat exchange with the air and other objects in the bathroom, increasing the perceived temperature in the bathroom. After heat exchange, the bathing wastewater flows into the toilet water tank through switching valve E and switching valve I to supply water to the toilet;

[0027] (6) The wall heat exchange coil uses hot water for bathing to provide heating: Under this condition, except for switching valve A, switching valve B, switching valve E, and switching valve J, the other switching valves are closed. The hot water from the external centralized hot water supply pipe enters the hot water supply pipe through the external hot water source interface, and then enters the wall heat exchange coil. After heat exchange, it flows back to the shower head from switching valve J for bathing. After the temperature of the wall heat exchange coil increases, the temperature of the assembled wall panel also increases. The assembled wall panel conducts convection and radiation heat exchange with the air and other objects in the bathroom, thereby increasing the perceived temperature in the bathroom. At this time, the bathing hot water temperature drops after heat exchange and approaches the comfortable temperature for bathing water. It is supplied to the shower head through switching valve M. If the temperature is still too high, the automatic water mixing and temperature control valve of the shower head opens the cold water valve of the bathing head to mix the water, thereby reducing the bathing water supply temperature to a comfortable range.

[0028] (7) Heating condition using heat recovery coil to recover heat: In this condition, the shower head is in use. Except for the switching valves A, C, E, I, L, and F, the switching valve G is closed, and the other switching valves are also closed. The heat recovery exhaust fan is turned on to exhaust air, and the low-temperature tap water from the external tap water pipe enters the heat recovery coil through the external tap water interface and exchanges heat with the hot air discharged by the heat recovery exhaust fan. After the heat exchange, the temperature of the low-temperature tap water in the external tap water pipe increases and is supplied to the shower head and the mixing point of the hot water for bathing. As the tap water temperature increases, the consumption of hot water for bathing is reduced.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. Equipped with wall heat exchange coils, a water collection tank, a water pump and multiple switching valves at the bottom of the shower area, which can be switched through the switching valves to flexibly use the heating circulating water or bathing wastewater from an external heat source for heating, thereby improving the perceived temperature and comfort in the bathroom. Among them, the wall heat exchange coil is used to increase the wall temperature to achieve wall radiation heating, which is highly comfortable and saves energy. Using bathing wastewater for heating can recycle the heat in the bathing wastewater, which can achieve better energy-saving effects.

[0031] 2. The water sprayed from the shower head is a mixture of cold and hot water for bathing, which reaches a comfortable temperature for the human body (generally 40°C). The heat of hot water for bathing is consumed in heating the cold water for bathing at a low temperature. The higher the cold water supply temperature, the lower the energy consumption for bathing. The present invention is provided with a heat recovery coil to recover the heat in the exhaust air to preheat the tap water (i.e., cold water for bathing), and supply it to the mixing point of the shower head and hot water for bathing. As the tap water temperature is increased, the consumption of hot water for bathing is reduced, thus achieving the purpose of energy saving.

[0032] 3. A toilet water tank is provided, which can recycle the waste water from bathing for flushing toilets through pipelines. In the recycling process, the waste water from bathing flows through the wall heat exchange coil, and the heat in the waste water (hot water) is recovered through the wall heat exchange coil for indoor heating, thus achieving the dual purpose of waste water reuse and water saving and energy saving.

[0033] 4. By switching each switching valve, six working conditions can be realized, including wall heat exchange coil using external heat source for heating, wall heat exchange coil using external cold source for cooling, wall heat exchange coil using cold water for bathing and flushing, wall heat exchange coil using cold water for toilet flushing, wall heat exchange coil using recycled hot water for bathing and wall heat exchange coil using heat recovery coil to recover heat for heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0035] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of the middle wall heat exchange coil.

[0036] In the figure: 1. Assembled wall panel, 1-1. Building wall, 1-2. Wall keel, 2. Assembled ceiling panel, 2-1. Bathroom heater, 3. Pipeline area, 3-1. Hot water supply pipe, 3-11. External hot water source interface, 3-2. Cold water supply pipe, 3-21. External tap water interface, 3-3. Wall heat exchange coil, 3-31. External cold and heat source interface, 4. Shower area, 4-1. Shower head, 4-2. Heat recovery device, 4-21. Heat recovery exhaust fan, 4-22. Heat recovery coil, 4-3. Water collection tank, 4-31. Water pump, 4-32. Electric drain, 4-33. Water receiving bottom plate, 4-4. Toilet, 4-41. Toilet water tank, 4-5. Raised floor, 4-6. Structural ground, 5. Branch pipe, 6. Smart home controller, 7. Electric window. 8. Switching valve A, 9. Switching valve B, 10. Switching valve C, 11. Switching valve D, 12. Switching valve E, 13. Switching valve F, 14. Switching valve G, 15. Switching valve H, 16. Switching valve I, 17. Switching valve J, 18. Switching valve K, 19. Switching valve L, 20. Switching valve M. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Embodiment of the bathroom energy-saving and water-saving system based on prefabricated decoration of the present invention

[0039] Reference Figure 1 This embodiment includes an assembled wall panel 1, an assembled ceiling panel 2, a pipe area 3 and a shower area 4 installed on a building wall 1-1. The pipe area 3 is provided with a hot water supply pipe 3-1, a cold water supply pipe 3-2, and a wall heat exchange coil 3-3. The shower area 4 is provided with a shower head 4-1. The shower head 4-1 is connected to the hot water supply pipe 3-1 and the cold water supply pipe 3-2. The hot water supply pipe 3-1 and the cold water supply pipe 3-2 are connected to the wall heat exchange coil 3-3. The cold water supply pipe 3-2 is provided with an external tap water interface 3-21, and the hot water supply pipe 3-1 is provided with an external hot water source interface 3-11. The hot water supply pipe 3-1 is provided with a switching valve A8 above the shower head 4-1, the hot water supply pipe 3-1 is provided with a switching valve B9 below the shower head 4-1, the cold water supply pipe 3-2 is provided with a switching valve C10 above the shower head 4-1, the cold water supply pipe 3-2 is provided with a switching valve D11 below the shower head 4-1, and a switching valve E12 is provided between the connecting point between the hot water supply pipe 3-1 and the wall heat exchange coil 3-3 and the connecting point between the cold water supply pipe 3-2 and the wall heat exchange coil 3-3.

[0040] A heat recovery device 4-2 is provided above the shower area 4, and the heat recovery device 4-2 includes a heat recovery exhaust fan 4-21 and a heat recovery coil 4-22. The heat recovery coil 4-22 is connected to the cold water supply pipe 3-2. A switching valve F13 and a switching valve G14 are provided between the heat recovery coil 4-22 and the cold water supply pipe 3-2. The switching valve F13 is located on the heat recovery coil 4-22, and the switching valve G14 is located on the cold water supply pipe 3-2.

[0041] A water collecting tank 4-3 is provided at the bottom of the shower area 4, and a toilet 4-4 is also provided in the shower area 4. One end of the water collecting tank 4-3 is connected to the wall heat exchange coil 3-3, and the other end is connected to the toilet water tank 4-41. A switching valve H15 is provided between the water collecting tank 4-3 and the wall heat exchange coil 3-3, and a switching valve I16 is provided between the water collecting tank 4-3 and the toilet water tank 4-41.

[0042] A branch pipe 5 is provided on the cold water supply pipe 3-2, the upper end of the branch pipe 5 is connected to the cold water supply pipe 3-2, the middle end is connected to the shower head 4-1, and the lower end is connected to the wall heat exchange coil 4-22.

[0043] A switching valve J17 is provided between the branch pipe 5 and the shower head 4 - 1 , and a switching valve K18 is provided on the upper part of the branch pipe.

[0044] The wall heat exchange coils 3-3 are arranged in parallel in a runway manner, and two external cold and heat source interfaces 3-31 are provided on the wall heat exchange coils 3-3. A switching valve L19 is provided above the external cold and heat source interfaces 3-31 for connecting two adjacent sections of the wall heat exchange coils 3-3, and a switching valve M20 is provided between one of the external cold and heat source interfaces 3-31 and the hot water supply pipe 3-1.

[0045] In this embodiment, the assembled wall panel 1 in the bathroom is a calcium silicate decorative panel or other decorative panel with good thermal conductivity. The assembled wall panel 1 is installed on the building wall 1-1 through the wall keel 1-2. The building wall 1-1 is a building enclosure structure wall of the prior art, which can be a reinforced concrete cast-in-place wall or a block masonry wall. The wall heat exchange coil 4-22 is made of PB and PERT tubes, installed in the gap between the building wall 1-1 and the wall keel 1-2, and fixed on the building wall 1-1. The wall keel 1-2 is an aluminum alloy keel, which is fixed to the building wall 1-1 through a bracket and expansion bolts.

[0046] A water pump 4-31 powered by safe low voltage is arranged in the water collecting tank 4-3 at the bottom of the shower area 4. The water pump 4-31 adopts liquid level interlocking control, and when the pump start level is reached, the lifting water pump 4-31 is started to supply water to the wall heat exchange coil 3-3.

[0047] An electric drain port 4-32 is provided at the bottom of the water collecting tank 4-3. When the wall heat exchange coil 3-3 does not need water circulation, the electric drain port 4-32 is opened to drain water.

[0048] A water receiving bottom plate 4-33 is provided on the upper part of the water collecting tank 4-3, and an electric drain port 4-32 is reserved in the center. Bathing sewage can flow into the bottom of the water collecting tank 4-3 from the electric drain port 4-32 on the water receiving bottom plate.

[0049] The assembled ceiling board 2 is a calcium silicate board provided with a moisture-proof layer and is installed on the ceiling keel. A bathroom heater 2-1 and a heat recovery exhaust fan 4-21 are suspended on the assembled ceiling board.

[0050] The bathroom heater 2-1 is a radiant heating bathroom heater without an exhaust fan, which can be turned on or off manually or according to the instruction of the smart home controller 6. The smart home controller 6 is a prior art, which is a centralized controller of the current smart home system, such as a Siemens smart home controller.

[0051] The heat recovery exhaust fan 4-21 is an exhaust fan with adjustable air volume, and the outlet of the heat recovery exhaust fan 4-21 is connected to the heat recovery coil 4-22. The hot air exhausted by the heat recovery exhaust fan 4-21 flows through the heat recovery coil 4-22 at a high speed, and conducts heat convection with the bathing cold water in the heat recovery coil 4-22, thereby heating the bathing cold water and increasing the temperature of the bathing cold water.

[0052] The heat recovery coil 4-22 is made of thin-walled stainless steel pipe, and is connected to the water supply pipe by a steel-plastic conversion.

[0053] The upper end of the hot water supply pipe 3-1 is connected to the water heater or the centralized hot water system, the lower end is connected to the wall heat exchange coil 3-3, and the middle part is connected to the shower head 4 to supply hot water for bathing. It is installed between the wall keel and the wall and is made of PPR material.

[0054] The upper end of the cold water supply pipe 3-2 is connected to the heat recovery coil 4-22, the lower end is connected to the wall heat exchange coil 3-3, and the middle part is connected to the shower head 4 to supply cold water for bathing. It is installed between the wall keel and the wall and is made of PPR material.

[0055] The building wall 1-1 is provided with an electric window 7, which can be opened to introduce fresh air from the outside, and closed when the room needs to be kept warm.

[0056] Switching valve A8, switching valve B9, switching valve C10, switching valve D11, switching valve E12, switching valve F13, switching valve G14, switching valve H15, switching valve I16, switching valve J17, switching valve K18, switching valve L19, and switching valve M20 are all solenoid valves that can be opened or closed under the control of a smart home controller (or other controller).

[0057] The installation position of the switching valve J17 is opposite to the water supply pipe of the shower head.

[0058] The shower head 4-1 is equipped with a cold water valve, a hot water valve and an automatic water mixing and temperature control valve of the prior art. The automatic water mixing and temperature control valve can automatically adjust the opening of the cold water valve, the hot water valve and the switching valve J17 of the shower head according to the temperature set by the user. When the switching valve J17 is opened, the hot water valve of the shower head 4-1 is automatically closed.

[0059] The toilet water tank 4-41 is a water tank provided by the toilet 4-4. In addition to the interface for ordinary flushing water supply, the toilet water tank 4-41 is also provided with an interface that can be connected to the wall heat exchange coil 3-3. The toilet water tank 4-41 is also provided with an overflow port, and the overflow water can flow into the toilet 4-1.

[0060] The toilet 4-4 is a toilet according to the prior art, and the elevated floor 4-5 is an elevated floor according to the prior art. Water supply and drainage pipes, electric pipes, etc. can be installed between the board surface of the elevated floor 4-5 and the structural ground 4-6.

[0061] The external cold and hot source interface 3-31 consists of two pipe interfaces, one of which is an external water supply interface and the other is an external water return interface. One end of the external cold and hot source interface 3-31 is connected to the water supply pipe and return pipe of the external heat source or cold source, and the other end is connected to the wall heat exchange coil 3-3. The external tap water interface 3-21 is connected to the external tap water supply pipe, and the external hot water source interface 3-11 is connected to the external centralized hot water supply pipe. Both the external tap water interface 3-21 and the external hot water source interface 3-11 are equipped with a one-way valve to prevent water in the system from flowing back into the external water pipe.

[0062] The operating method of the bathroom energy-saving and water-saving system based on prefabricated decoration according to the embodiment of the present invention:

[0063] The operation method of the sanitary ware energy-saving and water-saving system based on prefabricated decoration implemented in this embodiment includes 6 working conditions: each working condition and the operation steps of each working condition are as follows:

[0064] Working condition 1: The wall heat exchange coil 3-3 uses an external heat source for heating. In this working condition, except for the switching valve E12, all switching valves are closed, and the heating circulating water of the external heat source is supplied to the wall heat exchange coil 3-3 from the external cold and hot source interface 3-31. When the temperature of the wall heat exchange coil 3-3 increases, the temperature of the assembled wall panel also increases. The assembled wall panel conducts convection and radiation heat exchange with the air and other objects in the bathroom, thereby increasing the perceived temperature in the bathroom.

[0065] Working condition 2: The wall heat exchange coil 3-3 uses an external cold source for cooling. In this working condition, except for the switching valve A1, all switching valves are closed, and the cooling circulating water of the external cold source is supplied to the wall heat exchange coil 3-3 from the external cold and heat source interface 3-31. After the temperature of the wall heat exchange coil 3-3 decreases, the temperature of the assembled wall 1 panel also decreases. The assembled wall 1 panel conducts convection and radiation heat exchange with the air and other objects in the bathroom, reducing the perceived temperature in the bathroom.

[0066] Working condition 3: The wall heat exchange coil 3-3 uses cold water for bathing and flushing to supply cooling. In this working condition, the shower head 4-1 is in use, and all switching valves are closed except for the switching valve K18, switching valve A8, switching valve D11, and switching valve F13. The low-temperature tap water from the external tap water pipe enters the cold water supply pipe 3-2 through the external tap water interface 3-21, and then enters the wall heat exchange coil 3-3 for heat exchange. The temperature of the assembled wall 1 panel also decreases accordingly. The assembled wall 1 panel conducts convection and radiation heat exchange with the air and other objects in the bathroom to reduce the perceived temperature in the bathroom. The tap water after heat exchange flows into the cold water supply pipe 3-2 through the switching valve D11 to supply water to the shower head 4-1.

[0067] Working condition 4: The wall heat exchange coil 3-3 uses the cold water of the toilet 4-4 for cooling. In this working condition, the toilet water tank 4-41 is short of water, and all the switching valves are closed except the switching valve E12, switching valve K18, switching valve I16, and switching valve F13. The low-temperature tap water from the external tap water pipe enters the cold water supply pipe 3-2 through the external tap water interface 3-21, and then enters the wall heat exchange coil 3-3 for heat exchange. The temperature of the assembled wall 1 panel also decreases accordingly. The assembled wall 1 panel conducts convection and radiation heat exchange with the air and other objects in the bathroom, reducing the perceived temperature in the bathroom. The tap water after heat exchange flows into the toilet water tank 4-41 through the switching valve E12 and the switching valve I16 to supply water to the toilet 4-4.

[0068] Working condition 5: The wall heat exchange coil 3-3 uses the hot water recycled from the bath to provide heating. In this working condition, the shower head 4-1 is in use or has been used for no more than 30 minutes, the water collection tank 4-3 at the bottom of the shower area 4 has water, and the toilet water tank 4-41 lacks water. Except for the switching valve A8, switching valve C10, switching valve E12, switching valve I16, switching valve L19, and switching valve F13, the other switching valves are closed. The hot water from the external centralized hot water supply pipe enters the hot water supply pipe 3-1 through the external hot water source interface 3-11, then enters the shower head 4-1 and mixes with the cold water for bathing (temperature is about 40°C) and sprays out, forming bathing waste water, which is collected in the water collection tank 4-3 at the bottom of the shower area 4, and is pressurized by the water pump 4-31 and sent to the wall heat exchange coil 3-3 for heat exchange. When the temperature of the wall heat exchange coil 3-3 increases, the temperature of the assembled wall 1 panel also increases. The assembled wall 1 panel conducts convection and radiation heat exchange with the air and other objects in the bathroom, increasing the perceived temperature in the bathroom. The bathing waste water after heat exchange flows into the toilet water storage tank 4-41 through the switching valve E12 and the switching valve I16 to supply water to the toilet 4-4.

[0069] Working condition 6: The wall heat exchange coil 3-3 uses hot water for bathing. In this working condition, all switching valves are closed except for switching valve A8, switching valve B9, switching valve E12, and switching valve J17. After the hot water from the external centralized hot water supply pipe enters the hot water supply pipe 3-1 through the external hot water source interface 3-11, it enters the wall heat exchange coil 3-3, and after heat exchange, it flows back from the switching valve J17 to the shower head 4-1 for bathing. When the temperature of the wall heat exchange coil 3-3 increases, the temperature of the assembled wall 1 panel also increases. The assembled wall 1 panel conducts convection and radiation heat exchange with the air and other objects in the bathroom, thereby increasing the perceived temperature in the bathroom. At this time, the temperature of the hot water for bathing drops after heat exchange (generally, the supply temperature of hot water for bathing is above 60°C), approaching the comfortable temperature of bathing water (40°C), and can be supplied to the shower head 4-1 through the switching valve M13. If the temperature is still too high, the automatic water mixing and temperature control valve of the shower head 4-1 opens the cold water valve of the bathing head to mix the water, thereby reducing the supply temperature of the bathing water to a comfortable range.

[0070] Working condition 7: Using the heat recovery coil 3-3 to recover heat for heating. In this working condition, the shower head 4-1 is in use. Except for the switching valves A8, C10, E12, I16, L19, and F13, the switching valve G14 is closed, and the other switching valves are also closed. The heat recovery exhaust fan 4-21 is turned on for exhaust. The low-temperature tap water from the external tap water pipe enters the heat recovery coil 3-3 through the external tap water interface 3-21 and exchanges heat with the hot air discharged by the heat recovery exhaust fan 4-21. After the heat exchange, the temperature of the low-temperature tap water in the external tap water pipe increases and is supplied to the mixing point of the shower head 4-1 and the hot water for bathing. As the tap water temperature increases, the consumption of hot water for bathing is reduced, achieving the purpose of energy saving.

[0071] Those skilled in the art may make various modifications and variations to the present invention. If these modifications and variations are within the scope of the claims of the present invention and their equivalents, then these modifications and variations are also within the protection scope of the present invention.

[0072] The contents not described in detail in the specification are prior art known to those skilled in the art.

Claims

1. A sanitary energy-saving and water-saving system based on prefabricated decoration, comprising a prefabricated wall panel, a prefabricated ceiling panel, a pipeline area and a shower area installed on a building wall, wherein the pipeline area is provided with a hot water supply pipe, a cold water supply pipe and a wall heat exchange coil, and the shower area is provided with a shower head, wherein the shower head is connected to the cold water supply pipe and the hot water supply pipe, and the hot water supply pipe and the cold water supply pipe are connected to the wall heat exchange coil, characterized in that: The hot water supply pipe is provided with a switching valve A and a switching valve B above and below the shower head, respectively; the cold water supply pipe is provided with a switching valve C and a switching valve D above and below the shower head, respectively; a switching valve E is provided between the connection point between the hot water supply pipe and the wall heat exchange coil and the connection point between the cold water supply pipe and the wall heat exchange coil; a heat recovery device connected to the cold water supply pipe is provided above the shower area, a water collecting tank is provided at the bottom of the shower area, and a toilet is also provided in the shower area, one end of the water collecting tank is connected to the wall heat exchange coil, and the other end thereof is connected to the toilet water storage tank; The heat recovery device includes a heat recovery exhaust fan and a heat recovery coil, the heat recovery coil is connected to the cold water supply pipe, and a switching valve F and a switching valve G are provided between the heat recovery coil and the cold water supply pipe, the switching valve F is provided on the heat recovery coil, and the switching valve G is provided on the cold water supply pipe; A switching valve H is provided between the water collecting tank and the wall heat exchange coil, and a switching valve I is provided between the water collecting tank and the toilet water tank; The water collecting tank is provided with a water receiving chassis on the top, a water pump is provided inside, and an electric drain port is provided at the bottom. The water pump adopts liquid level interlocking control. When the pump start level is reached, the water pump is started to supply water to the wall heat exchange coil; The cold water supply pipe is provided with a branch pipe, the upper end of the branch pipe is connected to the cold water supply pipe, the middle end is connected to the shower head, and the lower end is connected to the wall heat exchange coil; A switching valve J is provided between the branch pipe and the shower head, and a switching valve K is provided on the upper part of the branch pipe; the installation position of the switching valve J is directly opposite to the water supply pipe of the shower head; The wall heat exchange coils are arranged in parallel in a runway pattern, and an external cold and heat source interface is provided on the wall heat exchange coils. A switching valve L for connecting two adjacent sections of the wall heat exchange coils is provided above the external cold and heat source interface, and a switching valve M is provided between the external cold and heat source interface and the hot water supply pipe; The assembled ceiling panel is provided with a bathroom heater and a heat recovery exhaust fan, and the outlet of the heat recovery exhaust fan is connected to a heat recovery coil.

2. According to claim 1, a sanitary energy-saving and water-saving system based on prefabricated decoration is characterized in that: The assembled wall panel is installed on the building wall through a keel, and its material is a calcium silicate decorative panel.

3. The operating method of the sanitary energy-saving and water-saving system based on prefabricated decoration according to claim 1 is characterized in that: The following conditions are included: (1) The wall heat exchange coil uses an external heat source for heating: In this condition, except for the switching valve E, the other switching valves are closed, and the heating circulating water of the external heat source is supplied to the wall heat exchange coil from the external cold and hot source interface; after the temperature of the wall heat exchange coil increases, the temperature of the assembled wall panel also increases accordingly, and the assembled wall panel conducts convection and radiation heat exchange with the air and other objects in the bathroom, thereby increasing the perceived temperature in the bathroom; (2) The wall heat exchange coil 3-3 uses an external cold source to provide cooling: In this condition, except for the switching valve A, the other switching valves are closed, and the cooling circulating water from the external cold source is supplied to the wall heat exchange coil from the external source; after the temperature of the wall heat exchange coil decreases, the temperature of the assembled wall panel also decreases, and the assembled wall panel conducts convection and radiation heat exchange with the air and other objects in the bathroom, reducing the perceived temperature in the bathroom; (3) Wall heat exchange coil 3-3 uses cold water for bathing and flushing to supply cooling: In this condition, the shower head is in use. Except for switching valve K, switching valve A, switching valve D, and switching valve F, the other switching valves are closed; the low-temperature tap water from the external tap water pipe enters the cold water supply pipe through the external tap water interface and then enters the wall heat exchange coil for heat exchange. The temperature of the assembled wall panel 1 also decreases accordingly. The assembled wall panel 1 conducts convection and radiation heat exchange with the air and other objects in the bathroom, reducing the perceived temperature in the bathroom. The tap water after heat exchange flows into the cold water supply pipe through the switching valve D to supply water to the shower head; (4) Wall heat exchange coil uses cold water from the toilet for cooling: Under this condition, the toilet water tank is short of water. Except for switching valve E, switching valve K, switching valve I, and switching valve F, all switching valves are closed. Low-temperature tap water from the external tap water pipe enters the cold water supply pipe through the external tap water interface and then enters the wall heat exchange coil for heat exchange. The temperature of the assembled wall panel also decreases accordingly. The assembled wall panel conducts convection and radiation heat exchange with the air and other objects in the bathroom, reducing the perceived temperature in the bathroom. After heat exchange, the tap water flows into the toilet water tank through switching valve E and switching valve I to supply water to the toilet. (5) Wall heat exchange coils use hot water recycled from bathing to provide heating: Under this condition, the shower head is in use or has been used for no more than 30 minutes. There is water in the water collection tank at the bottom of the shower area, but there is no water in the toilet water tank. Except for switching valve A, switching valve C, switching valve E, switching valve I, switching valve L, and switching valve F, the other switching valves are closed; hot water from the external centralized hot water supply pipe enters the hot water supply pipe through the external hot water source interface, and then enters the shower head and mixes with the cold water for bathing and sprays out, forming bathing wastewater. It is collected in the water collection tank at the bottom of the shower area, and is pressurized by a water pump and sent to the wall heat exchange coil for heat exchange. When the temperature of the wall heat exchange coil increases, the temperature of the assembled wall panel also increases. The assembled wall panel conducts convection and radiation heat exchange with the air and other objects in the bathroom, thereby increasing the perceived temperature in the bathroom; the bathing wastewater after heat exchange flows into the toilet water tank through switching valve E and switching valve I to supply water to the toilet; (6) The wall heat exchange coil uses hot water for bathing to provide heating: Under this condition, except for switching valve A, switching valve B, switching valve E, and switching valve J, the other switching valves are closed. The hot water from the external centralized hot water supply pipe enters the hot water supply pipe through the external hot water source interface, and then enters the wall heat exchange coil. After heat exchange, it flows back to the shower head from switching valve J for bathing. After the temperature of the wall heat exchange coil increases, the temperature of the assembled wall panel also increases. The assembled wall panel conducts convection and radiation heat exchange with the air and other objects in the bathroom, thereby increasing the perceived temperature in the bathroom. At this time, the bathing hot water temperature drops after heat exchange and approaches the comfortable temperature of bathing water. It is supplied to the shower head through switching valve M. If the temperature is still too high, the automatic water mixing temperature control valve of the shower head opens the cold water valve of the bathing head to mix the water, thereby reducing the bathing water supply temperature to a comfortable range. (7) Using the heat recovery coil to recover heat for heating: Under this condition, the shower head is in use. Except for switching valves A, C, E, I, L, and F, switching valve G is closed and the other switching valves are also closed. The heat recovery exhaust fan is turned on to exhaust air. The low-temperature tap water from the external tap water pipe enters the heat recovery coil through the external tap water interface and exchanges heat with the hot air discharged by the heat recovery exhaust fan. After the heat exchange, the temperature of the low-temperature tap water in the external tap water pipe increases and is supplied to the mixing point of the shower head and the hot water for bathing. As the tap water temperature increases, the consumption of hot water for bathing is reduced.

Images