Cold water recovery device of hot water system

Abstract

The utility model relates to the technical field of hot water systems, and provides a cold water recovery device of a hot water system, which comprises a water storage tank connected with the output end of the hot water system, a cold water conveying structure and a hot water conveying structure, cold water remaining on the hot water system pipeline enters the water storage tank through the hot water system output end and the cold water conveying structure. A water outlet pipe connected with the hot water conveying structure is arranged on the water storage tank, and a drain valve is arranged on the water outlet pipe; the drain valve is opened to drain liquid in the water storage tank; and hot water of the hot water system is conveyed to the water outlet pipe of the water storage tank through the hot water conveying structure, so that the hot water outlet end and the water drainage structure of the water storage tank are integrally arranged on the same water outlet pipe. An original water storage tank overflow pipe arrangement structure is omitted, pipeline structures are reduced, and then the pipeline connection structure of the water storage tank is simplified.

Description

Technical Field

[0001] This utility model relates to the field of hot water system technology, and specifically to a cold water recovery device for a hot water system. Background Technology

[0002] Chinese Patent No. ZL202222519862.8 discloses an intelligent shower and its hot water system. The intelligent shower includes a water outlet device, a water inlet device, a water storage tank, a control switch, and a human body sensor switch. The water inlet device includes a cold water pipe, a hot water pipe, a mixing valve, and a three-way valve. The mixing valve is connected to the cold water pipe, the hot water pipe, and the three-way valve. The three-way valve is connected to the water outlet device and the water storage tank. A temperature sensor is installed inside the mixing valve. A water tank valve is installed on the three-way valve. The three-way valve connects to or closes the water storage tank through the water tank valve. The control switch is electrically connected to the mixing valve, the temperature sensor, the water tank valve, and the human body sensor switch. The control switch controls the water tank valve to connect to or close the water storage tank based on the sensing signal from the temperature sensor; or, the control switch controls the water tank valve to connect to or close the water storage tank based on the sensing signal from the human body sensor switch.

[0003] The aforementioned smart shower provides hot water without needing to drain the cold water, and eliminates the need for waiting time. When the hot water unit is a gas water heater, it relies on the tap water pressure to start the unit and delivers a section of cold water from the hot water pipe to the storage tank. A temperature sensor installed in the mixing valve detects the hot water, emitting an audible alert and displaying the temperature on the control panel. The tank valve remains open, ensuring the gas water heater continues to operate and preventing a 3-5 second delay in the cold water experience caused by restarting the ignition. When the storage tank is full, the water is drained through the overflow pipe. A solenoid valve is installed on the outlet at the lower part or bottom of the outer wall of the storage tank. The storage tank has three pipes: an overflow pipe, an outlet pipe, and a cold water delivery pipe, with a considerable number of pipe connections.

[0004] Therefore, further improvements are needed. Utility Model Content

[0005] This utility model proposes a cold water recovery device for a hot water system. The water storage tank is equipped with an outlet pipe connected to the hot water delivery structure, and the outlet pipe is equipped with a drain valve. When the drain valve is opened, the liquid in the water storage tank is discharged. When the drain valve is closed, the hot water of the hot water system is delivered to the outlet pipe of the water storage tank through the hot water delivery structure, so that the hot water outlet and the drainage structure of the water storage tank are integrated on the same outlet pipe, eliminating the original overflow pipe structure of the water storage tank, reducing the pipe structure, and thus simplifying the pipe connection structure of the water storage tank.

[0006] A cold water recovery device for a hot water system designed for this purpose includes a water storage tank connected to the output end of the hot water system, a cold water conveying structure, and a hot water conveying structure; cold water remaining on the hot water system pipes enters the water storage tank through the hot water system output end and the cold water conveying structure.

[0007] The water storage tank is equipped with a water outlet pipe connected to the hot water delivery structure, and the water outlet pipe is equipped with a drain valve.

[0008] The drain valve opens and discharges the liquid from the water storage tank; when the drain valve closes, the hot water from the hot water system is transported to the outlet pipe of the water storage tank through the hot water conveying structure, so that the hot water outlet and the drainage structure of the water storage tank are integrated on the same outlet pipe.

[0009] The connection between the hot water delivery structure and the outlet pipe is located below the drain valve. When the outlet pipe outputs hot water alone, the drain valve blocks the drain outlet of the water storage tank on the outlet pipe to prevent liquid from the water storage tank from being output to the outlet pipe.

[0010] The water storage tank is equipped with a liquid level sensor for detecting the liquid level in the tank. When the liquid level sensor detects that the liquid level in the tank has reached the corresponding height, the drain valve opens.

[0011] Alternatively, when the liquid level in the water tank 20 reaches the level sensor 22, the water tank 20 will stop receiving water.

[0012] A fixed bracket is provided on the top wall of the water storage tank, and the liquid level sensor is fixed on the fixed bracket with the probe of the liquid level sensor facing the inside of the water storage tank.

[0013] The water storage tank has a wire hole on its inner top wall.

[0014] A third switch valve is provided between the output end of the hot water system and the input end of the cold water conveying structure. When the third switch valve is opened, the cold water remaining on the hot water system pipe passes through the third switch valve and the cold water conveying structure into the water storage tank.

[0015] Before hot water is delivered to the hot water delivery structure from the output end of the hot water system, the third switch valve is opened for a set time to collect the cold water remaining on the hot water system pipes.

[0016] Alternatively, the hot water system output terminal is equipped with a first temperature sensor for detecting liquid temperature. When the first temperature sensor detects that the liquid temperature at the hot water system output terminal is lower than the set temperature value, the third switch valve opens.

[0017] A fourth switch valve is provided between the output end of the hot water system and the input end of the hot water delivery structure. When the fourth switch valve is opened, the hot water from the hot water system is delivered to the outlet pipe of the water storage tank through the fourth switch valve and the hot water delivery structure.

[0018] The drain valve is an electric drain valve, such as a drain solenoid valve, which is closed when the power is off and prevents the liquid in the water tank from being discharged to the outlet pipe; or, the drain valve is a power-off switch valve, which is open when the power is off and discharges the liquid in the water tank to the outlet pipe.

[0019] The water storage tank is equipped with a cold water inlet, and the output end of the cold water conveying structure is connected to the cold water inlet.

[0020] The water storage tank is provided with an installation hole for installing a water outlet pipe. The installation hole is located on the bottom of the water storage tank, and the drain valve is located on the outer side of the bottom of the water storage tank.

[0021] The beneficial technical effects of this utility model are as follows:

[0022] By installing a cold water recovery device on the shower system, the cold water remaining in the shower system pipes can be discharged in advance before the water is discharged. Moreover, the discharged cold water is stored in the water tank on the cold water recovery device, thus realizing cold water recovery.

[0023] The hot and cold water mixing inlet device is equipped with a manual mixing valve for opening and closing the mixed water output end. In the event of a power outage, the user can manually open the manual mixing valve, and the water outlet device can still output bath water, allowing the user to take a shower even when the power is off.

[0024] The inlet connector of the hot and cold water mixing device is located on the back of the box. The back of the box has a groove corresponding to the inlet connector. The groove forms a hollowed-out groove on the back of the box to reduce the amount of material used in the box manufacturing. When the box is in the wall-mounted installation state, the inlet connector and the part of the pipe connected to the inlet connector are hidden on the back of the box to avoid the inlet connector and the part connected to the inlet connector occupying the space on the outside of the box.

[0025] Several separately spaced switching valves are connected to the same connector, which facilitates pipeline maintenance and installation. The use of four-way or three-way solenoid valves has been eliminated. Each switching valve controls the on / off of a water circuit independently, so when a single switching valve is damaged, it will not affect the use of the entire shower system.

[0026] The cold water discharge structure of the cold water recovery device's storage tank and the water outlet structure of the hot and cold mixing water inlet device share a single water outlet pipe. The overflow drainage structure inside the storage tank is eliminated, the pipe connection structure is reduced, and the internal structure of the storage tank is simplified. Attached Figure Description

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] Figure 1This is a schematic diagram of the cold water recovery device of the hot water system according to the first embodiment of this utility model.

[0029] Figure 2 This is a schematic diagram of the structure of the cold water recovery device outputting hot water in the hot water system of the first embodiment of this utility model.

[0030] Figure 3 This is a three-dimensional structural diagram of the bathing system according to the second embodiment of the present invention.

[0031] Figure 4 This is a three-dimensional structural diagram of the bathing system according to the second embodiment of the present invention from another perspective.

[0032] Figure 5 This is a schematic diagram of the assembly and disassembly structure of the bathing system according to the second embodiment of this utility model.

[0033] Figure 6 This is a schematic diagram of the cross-sectional structure of the water storage tank of the bathing system according to the second embodiment of this utility model.

[0034] Figure 7 This is a schematic diagram of the water circuit structure of the cold water recovery device in the bathing system according to the second embodiment of this utility model.

[0035] Figure 8 This is a schematic diagram of the water path structure of the handheld shower head of the bathing system according to the second embodiment of this utility model.

[0036] Figure 9 This is a schematic diagram of the water channel structure of the overhead shower head of the shower system according to the second embodiment of this utility model.

[0037] Figure 10 This is a schematic diagram of the water path structure of the water outlet pipe of the water storage tank in the bathing system according to the second embodiment of this utility model.

[0038] Figure 11 This is a schematic diagram of the structure of the water storage tank discharging internal liquid according to the second embodiment of this utility model.

[0039] Figure 12 This is a schematic diagram of the water circuit structure for the manual mixing valve to be opened independently in the second embodiment of this utility model. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. In order to make the above-mentioned objects, features and advantages of the present application more apparent and understandable, many specific details are set forth in the following description in order to provide a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0041] First embodiment:

[0042] See Figure 1 and Figure 2 A cold water recovery device for a hot water system includes a water storage tank 20 connected to the output end of the hot water system, a cold water conveying structure 28, and a hot water conveying structure 29; cold water remaining on the hot water system pipes enters the water storage tank 20 through the output end of the hot water system and the cold water conveying structure 28.

[0043] The water storage tank 20 is provided with a water outlet pipe 23 connected to the hot water delivery structure 29, and a drain valve 24 is provided on the water outlet pipe 23.

[0044] The drain valve 24 is opened to discharge the liquid from the water storage tank 20; when the drain valve 24 is closed, the hot water from the hot water system is transported to the outlet pipe 23 of the water storage tank 20 through the hot water conveying structure 29, so that the hot water outlet end and the drainage structure of the water storage tank 20 are integrated on the same outlet pipe 23.

[0045] The connection between the hot water delivery structure 29 and the outlet pipe 23 is located below the drain valve 24. When the outlet pipe 23 outputs hot water alone, the drain valve 24 blocks the drain port of the water storage tank 20 on the outlet pipe 23 to prevent the liquid from the water storage tank 20 from being output to the outlet pipe 23.

[0046] Alternatively, when the liquid level in the water tank 20 reaches the level sensor 22, the water tank 20 will stop receiving water.

[0047] The liquid level sensor 22 can be provided in two or one.

[0048] The liquid level sensor 22 is provided in the following case:

[0049] The level sensor 22 is an electric float, and its connection point between the water storage tank 20 and the cold water pipe 21 is located at the bottom, side, or top of the water storage tank 20. Therefore, cold water enters the water storage tank 20 from the bottom, side, or top.

[0050] The liquid level sensor 22 has two configurations as follows:

[0051] One of the liquid level sensors 22 is an electro-float, and the other is a mechanical float. An additional mechanical float is installed at the water inlet of the water storage tank 20. When the electro-float detects that the water level in the water storage tank 20 has reached the high water level, the drain valve 24 opens, and the liquid in the water storage tank 20 is output to the outside of the water storage tank 20 along the water outlet pipe 23. Because the water level of the mechanical float in the water storage tank 20 is higher than that of the electro-float, the water storage tank 20 is still receiving water when the electro-float fails. When the water level in the water storage tank 20 reaches the mechanical float, the mechanical float uses buoyancy to block the water inlet, preventing the water storage tank 20 from overflowing.

[0052] When the water storage tank 20 is full, since the drainage speed of the water storage tank 20 is faster than the water inflow speed, the water storage tank 20 can collect cold water while draining water.

[0053] When the water is turned off for a period of time during showering, the gas water heater cools down due to re-ignition and heat dissipation from the hot water in the pipes. Temperature sensor 33 detects that the water temperature is lower than the set temperature, and the third switch valve 19 automatically opens. Cold water enters the water storage tank 20 through the third switch valve 19 and the cold water pipe 21. This water will be automatically discharged into the water tank until the water temperature reaches the set temperature, at which point it will be discharged from the top shower head 18, the hand shower head 16, or from the water outlet pipe 23 of the water storage tank 20.

[0054] This product can be started via voice control, remote control, or infrared sensor trigger. The circuit board inside the control box 27 of the enclosure 7 can be equipped with corresponding voice control switches or infrared receiver switches, etc.

[0055] The housing 7 houses a lithium battery 71 and a power switch assembly 72. The power switch assembly 72 mainly includes the following types: power switching devices, rectifier devices, and filter devices.

[0056] The connection between the water storage tank 20 and the cold water pipe 21 is preferably located on the top of the water storage tank 20. Therefore, cold water enters the water storage tank 20 from the top. When the float rises, it can block the cold water inlet at the top of the water storage tank 20.

[0057] The water storage tank 20 is equipped with a liquid level sensor 22 for detecting the liquid position in the water storage tank 20. When the liquid level sensor 22 detects that the liquid in the water storage tank 20 has reached the corresponding liquid position height, the drain valve 24 is opened.

[0058] A fixed bracket 30 is provided on the inner top wall of the water storage tank 20, and the liquid level sensor 22 is fixed on the fixed bracket 30 with the probe of the liquid level sensor 22 facing the inside of the water storage tank 20.

[0059] The water storage tank 20 has a wire hole on its inner top wall.

[0060] In this embodiment, the water tank 20 is provided with a transparent observation window for observing the liquid level in the water tank 20, or the water tank 20 is made of a transparent material.

[0061] A third switch valve 19 is provided between the output end of the hot water system and the input end of the cold water conveying structure 28. When the third switch valve 19 is opened, the cold water remaining on the hot water system pipe passes through the third switch valve 19 and the cold water conveying structure 28 into the water storage tank 20.

[0062] Before hot water is delivered to the hot water delivery structure 29 from the output end of the hot water system, the third switch valve 19 is opened for a corresponding set time to collect the cold water remaining on the hot water system pipes.

[0063] Alternatively, the hot water system output terminal is equipped with a first temperature sensor 35 for detecting liquid temperature. When the first temperature sensor 35 detects that the liquid temperature at the hot water system output terminal is lower than the set temperature value, the third switch valve 19 opens.

[0064] A fourth switch valve 25 is provided between the output end of the hot water system and the input end of the hot water delivery structure 29. When the fourth switch valve 25 is opened, the hot water of the hot water system is delivered to the outlet pipe 23 of the water storage tank 20 through the fourth switch valve 25 and the hot water delivery structure 29.

[0065] When the first temperature sensor 35 detects that the liquid temperature at the output of the hot water system reaches the set temperature value, the fourth switch valve 25 opens.

[0066] The drain valve 24 is a drain solenoid valve, which is closed when the power is off and prevents the liquid in the water storage tank 20 from being discharged to the outlet pipe 23; or, the drain valve 24 is a power-off switch valve, which is open when the power is off and discharges the liquid in the water storage tank 20 to the outlet pipe 23.

[0067] The water storage tank 20 is equipped with a cold water inlet, and the output end of the cold water conveying structure 28 is connected to the cold water inlet.

[0068] The water storage tank 20 is provided with an installation hole for installing the water outlet pipe 23. The installation hole is located on the bottom of the water storage tank 20, and the drain valve 24 is located on the outer side of the bottom of the water storage tank 20.

[0069] In this embodiment, the inlet and outlet of the water storage tank 20 are both located at the bottom of the inner wall of the water storage tank 20. The inlet of the water storage tank 20 is connected to the cold water pipe 21, and the outlet of the water storage tank 20 is connected to the outlet pipe 23. Alternatively, the inlet of the water storage tank 20 is located on the side of the water storage tank 20, or it is located near the top wall of the water storage tank 20, and the inlet of the water storage tank 20 is located below the liquid level sensor 22.

[0070] Second embodiment:

[0071] See Figures 3-12 A shower system, which is equivalent to the hot water system of the first embodiment, includes a water outlet device 4, a cold water recovery device 5, and a hot and cold water inlet device 3 with a mixed water output terminal 30.

[0072] The inlet ends of the water outlet device 4 and the cold water recovery device 5 are respectively connected to the mixed water output end 30. A switch valve 1 is provided on the connecting pipeline between the inlet ends of the water outlet device 4 and the cold water recovery device 5 and the mixed water output end 30. The switch valve 1 is used to control the opening and closing of the water path between the hot and cold mixed water inlet device 3 and the water outlet device 4, and to control the opening and closing of the water path between the hot and cold mixed water inlet device 3 and the cold water recovery device 5.

[0073] The switching valve 1 is an electric switching valve or a manual switching valve.

[0074] When the switch valve 1 is a manual switch valve, the cold water recovery device 5 and the water outlet device 4 can be used even when the power is off.

[0075] By installing a cold water recovery device 5 on the shower system, the water outlet device 4 can pre-discharge the cold water remaining on the shower system pipes through the cold water recovery device 5 before discharging water, and the discharged cold water is stored in the water storage tank 20 on the cold water recovery device 5 to achieve cold water recovery.

[0076] The hot and cold water mixing inlet device 3 is equipped with a manual mixing valve 6 and / or an electric mixing valve 12 for opening and closing the mixed water output end 30. In the event of a power outage, the user can manually open the manual mixing valve 6, and the water outlet device 4 can still output bath water, allowing the user to take a bath even when the power is off.

[0077] The water outlet device 4, the cold water recovery device 5, and the hot and cold water mixing inlet device 3 with a mixed water output end 30 are integrated on the same housing 7. The hot and cold water mixing inlet device 3 includes an inlet connector 10 set on the back of the housing 7. The back of the housing 7 is provided with a groove 11 corresponding to the inlet connector 10. When the housing 7 is in the installation and use state, the inlet connector 10 and the part of the pipe connected to the inlet connector 10 are all hidden on the back of the housing 7.

[0078] Alternatively, the water inlet connector 10 can be located on the side or bottom of the tank body 7.

[0079] It also includes a housing 7, a hot and cold water mixing inlet device 3 is installed on the housing 7, and a flow regulating valve 14 for adjusting the water flow is provided on the hot and cold water mixing inlet device 3. The input end of the flow regulating valve 14 is connected to the mixed water output end 30.

[0080] The flow regulating valve 14 and / or the manual mixing valve 6 are located on the outer side of the housing 7.

[0081] In this embodiment, a first through-slot is provided on the outer side of the housing 7, through which the manual mixing valve 6 is exposed on the outer side of the housing 7, facilitating manual control of the manual mixing valve 6 by the user on the outer side of the housing 7. A second through-slot is provided on the outer side of the housing 7, through which the flow regulating valve 14 is exposed on the outer side of the housing 7, facilitating manual control of the flow regulating valve 14 by the user on the outer side of the housing 7.

[0082] In this embodiment, both the electric mixing valve 12 and the manual mixing valve 6 include a valve body and a valve core that rotates within the valve body. A temperature regulating chamber is provided between the valve core and the valve body. The valve core of the electric mixing valve 12 is driven to rotate by a motor, and the valve core of the manual mixing valve 6 is rotated by a rotating hand ring.

[0083] A temperature sensor 33 for detecting water temperature is also provided on the connecting pipes between the inlet of the water outlet device 4 and the cold water recovery device 5 and the mixed water output end 30.

[0084] The temperature sensor 33 detects that the water temperature at the mixed water output terminal 30 is lower than the set water temperature. The corresponding switch valve 1 connects the hot and cold water mixing inlet device 3 and the cold water recovery device 5. The liquid output from the hot and cold water mixing inlet device 3 along the mixed water output terminal 30 enters the cold water recovery device 5.

[0085] Alternatively, temperature sensors 33 are not installed on the connecting pipes between the inlet ends of the water outlet device 4 and the cold water recovery device 5 and the mixed water output end 30, respectively; the water circuit between the hot and cold mixed water inlet device 3 and the cold water recovery device 5 is connected by the corresponding switch valve 1 for a set time to discharge the cold water remaining on the pipe of the hot and cold mixed water inlet device 3.

[0086] The hot and cold water mixing device 3 includes an electric mixing valve 12, a flow regulating valve 14, a first water inlet 8, and a second water inlet 9, which are installed on the housing 7. The first water inlet 8 and the second water inlet 9 are installed on the back, side or bottom of the housing 7 and form a water inlet connector 10.

[0087] The inlet connector 10 of the hot and cold water mixing inlet device 3 is located on the back of the box 7. The back of the box 7 is provided with a groove 11 corresponding to the inlet connector 10. The groove 11 forms a hollowed-out groove on the back of the box 7 to reduce the material used in the manufacture of the box 7. When the box 7 is in the wall-mounted installation state, the inlet connector 10 and the part of the pipe connected to the inlet connector 10 are hidden on the back of the box 7 to avoid the inlet connector 10 and the part connected to the inlet connector 10 occupying the outer space of the box 7.

[0088] The first water inlet 8 and the second water inlet 9 are both connected to the input end of the electric mixing valve 12. The first water inlet 8 and the second water inlet 9 are also connected to the input end of the manual mixing valve 6. The output end of the electric mixing valve 12 or the output end of the manual mixing valve 6 forms a mixed water output end 30. The output end of the electric mixing valve 12 or the manual mixing valve 6 is connected to the input end of the flow regulating valve 14 so as to regulate the flow rate of the mixed water output by the corresponding mixing valve through the flow regulating valve 14.

[0089] The switching valve 1 includes a first switching valve 15, and the water outlet device 4 includes a handheld shower head 16.

[0090] The hot and cold water mixing inlet device 3 is equipped with an electric mixing valve 12 for opening and closing the mixing water output end 30. The output end of the electric mixing valve 12 is connected to the input end of the first switch valve 15. The output end of the first switch valve 15 is connected to the water inlet end of the handheld shower head 16. When both the electric mixing valve 12 and the first switch valve 15 are in the open state, the liquid flows along the electric mixing valve 12 and the first switch valve 15 of the hot and cold water mixing inlet device 3 and is output to the handheld shower head 16.

[0091] Alternatively, the hot and cold water mixing inlet device 3 is equipped with a manual mixing valve 6 for opening and closing the mixed water output end 30. The output end of the manual mixing valve 6 is connected to the water inlet end of the handheld shower head 16. When the manual mixing valve 6 is open, the liquid is output to the handheld shower head 16 along the manual mixing valve 6 of the hot and cold water mixing inlet device 3.

[0092] In this embodiment, the housing 7 is provided with a through hole for connecting the overhead shower head 18, and the through hole is provided with an overhead shower head water outlet pipe connecting the overhead shower head 18 and the second switch valve 17. The overhead shower head water outlet pipe extends out of the through hole of the housing 7 and is connected to the overhead shower head 18.

[0093] In this embodiment, the output end of the first switching valve 15 is connected to a three-way valve. One end of the three-way valve is connected to the first switching valve 15, and the other end of the three-way valve is connected to the handheld shower head 16. The other end of the three-way valve is also connected to the output end of the manual mixing valve 6.

[0094] The switching valve 1 includes a second switching valve 17, and the water outlet device 4 includes a top spray shower head 18. The output end of the second switching valve 17 is connected to the water inlet end of the top spray shower head 18. Both the second switching valve 17 and the mixed water output end 30 are in the open state, and the liquid is output to the top spray shower head 18 along the hot and cold mixed water inlet device 3 and the second switching valve 17.

[0095] The switch valve 1 includes a third switch valve 19, the cold water recovery device 5 includes a water storage tank 20 and a cold water pipe 21, the shower system includes a housing 7, the water storage tank 20 is installed inside the housing 7 of the shower system, one end of the cold water pipe 21 is connected to the cold water inlet of the water storage tank 20, and the other end of the cold water pipe 21 is connected to the output end of the third switch valve 19. The third switch valve 19 and the mixed water output end 30 are both in the open state, and the liquid enters the water storage tank 20 along the hot and cold mixed water inlet device 3, the third switch valve 19 and the cold water pipe 21.

[0096] The water storage tank 20 is equipped with a water outlet pipe 23, and the water outlet pipe 23 is equipped with a drain valve 24.

[0097] The water outlet device 4 includes an outlet pipe 23 and an inlet pipe 26 installed on the water storage tank 20. The switch valve 1 includes a fourth switch valve 25. The output end of the fourth switch valve 25 is connected to one end of the inlet pipe 26, and the other end of the inlet pipe 26 is connected to the side of the outlet pipe 23. The drain valve 24 is located at the upper part of the outlet pipe 23, and the connection end between the inlet pipe 26 and the outlet pipe 23 is located below the drain valve 24.

[0098] The drain valve 24 is closed, and the fourth switch valve 25 and the mixed water output terminal 30 are both in the open state. The liquid is transported to the outlet pipe 23 along the hot and cold mixed water inlet device 3, the fourth switch valve 25 and the inlet pipe 26.

[0099] The drain valve 24 is a drain solenoid valve. The water storage tank 20 is equipped with a liquid level sensor 22 for detecting the water level. When the liquid level sensor 22 detects that the liquid in the water storage tank 20 has reached the corresponding water level, the drain valve 24 opens and the liquid in the water storage tank 20 is output to the outside of the water storage tank 20 along the water outlet pipe 23.

[0100] Alternatively, when the liquid level in the water tank 20 reaches the appropriate level, the water tank 20 will stop receiving water.

[0101] The liquid level sensor 22 can be provided in two or one.

[0102] The liquid level sensor 22 is provided in the following case:

[0103] The level sensor 22 is an electric float, and its connection point between the water storage tank 20 and the cold water pipe 21 is located at the bottom, side, or top of the water storage tank 20. Therefore, cold water enters the water storage tank 20 from the bottom, side, or top.

[0104] The liquid level sensor 22 has two configurations as follows:

[0105] One of the liquid level sensors 22 is an electro-float, and the other is a mechanical float. An additional mechanical float is installed at the water inlet of the water storage tank 20. When the electro-float detects that the water level in the water storage tank 20 has reached the high water level, the drain valve 24 opens, and the liquid in the water storage tank 20 is output to the outside of the water storage tank 20 along the water outlet pipe 23. Because the water level of the mechanical float in the water storage tank 20 is higher than that of the electro-float, the water storage tank 20 is still receiving water when the electro-float fails. When the water level in the water storage tank 20 reaches the mechanical float, the mechanical float uses buoyancy to block the water inlet, preventing the water storage tank 20 from overflowing.

[0106] When the water storage tank 20 is full, since the drainage speed of the water storage tank 20 is faster than the water inflow speed, the water storage tank 20 can collect cold water while draining water.

[0107] When the water is turned off for a period of time during showering, the gas water heater cools down due to re-ignition and heat dissipation from the hot water in the pipes. Temperature sensor 33 detects that the water temperature is lower than the set temperature, and the third switch valve 19 automatically opens. Cold water enters the water storage tank 20 through the third switch valve 19 and the cold water pipe 21. This water will be automatically discharged into the water tank until the water temperature reaches the set temperature, at which point it will be discharged from the top shower head 18, the hand shower head 16, or from the water outlet pipe 23 of the water storage tank 20.

[0108] This product can be started via voice control, remote control, or infrared sensor trigger. The circuit board inside the control box 27 of the enclosure 7 can be equipped with corresponding voice control switches or infrared receiver switches, etc.

[0109] The housing 7 houses a lithium battery 71 and a power switch assembly 72. The power switch assembly 72 mainly includes the following types: power switching devices, rectifier devices, and filter devices.

[0110] The connection between the water storage tank 20 and the cold water pipe 21 is preferably located on the top of the water storage tank 20. Therefore, cold water enters the water storage tank 20 from the top. When the float rises, it can block the cold water inlet at the top of the water storage tank 20.

[0111] Alternatively, the drain valve 24 is a power-off switch valve, and the water storage tank 20 is not equipped with a liquid level sensor 22. The power-off switch valve opens and drains the liquid in the water storage tank 20 when the power is off.

[0112] The switching valve 1 is provided in several parts. The several switching valves 1 are set separately and independently at intervals and are set on the same connecting member 2. The connecting member 2 is provided with a connecting end for each switching valve 1. Each switching valve 1 is a solenoid valve or a switching valve driven by a motor to rotate.

[0113] The shower system includes a housing 7, a connector 2 is installed inside the housing 7, a control box 27 is installed inside the housing 7, a circuit board is installed inside the control box 27, and each switch valve 1 is an electric switch valve and is electrically connected to the circuit board.

[0114] It also includes a power supply electrically connected to the circuit board, which is a power supply battery located inside the housing 7, and / or the housing 7 is provided with a power cord socket or power cord for connecting to an external power source, so that the product can be plugged in or can use a rechargeable battery in the event of a power outage.

[0115] In this embodiment, connector 2 has a first connecting end and a second connecting end on one side, a third connecting end and a fourth connecting end on the other side, and a fifth connecting end on the top. The first connecting end is connected to connector 13, which contains a temperature sensor 33 and a water flow sensor 34. The second connecting end is connected to the first switching valve 15, the third connecting end is connected to the fourth switching valve 25, the fourth connecting end is connected to the third switching valve 19, and the fifth connecting end is connected to the second switching valve 17. Several separately spaced switching valves 1 are connected to the same connector 2, facilitating pipe maintenance and installation. The use of four-way or three-way solenoid valves is eliminated. Each switching valve 1 independently controls the flow of one water path, so damage to a single switching valve 1 will not affect the use of the entire bathing system.

[0116] The connector 13 is equipped with a water flow sensor 34. When the water flow is detected to be too low, the sensor will activate the light display, screen prompt, or sound prompt to remind the user to increase the water flow through the flow regulating valve 14 to prevent the gas water heater from failing to ignite.

[0117] See Figure 5 The first inlet 8 can be connected to a tap water pipe, and the second inlet 9 can be connected to the hot water outlet of the water heater. When the electric mixing valve 12 is opened, cold water and hot water are mixed at the electric mixing valve 12. The mixed water is output from the mixed water output terminal 30 of the electric mixing valve 12. The mixed water passes through the temperature sensor 33 in the connecting seat 13 along the flow regulating valve 14. If the temperature sensor 33 detects that the outlet water temperature has not reached the set temperature value, the third switch valve 19 is opened, and the cold water enters the water storage tank 20 through the third switch valve 19 and the cold water pipe 21.

[0118] See Figure 6 When the electric mixing valve 12 is opened, cold water and hot water are mixed at the electric mixing valve 12. The mixed water is output from the mixed water output terminal 30 of the electric mixing valve 12. The mixed water passes through the temperature sensor 33 in the connecting seat 13 along the flow regulating valve 14. If the temperature sensor 33 detects that the outlet water temperature reaches the set temperature value, the third switch valve 19 is closed. In the absence of power interruption, when the user needs to use the handheld shower head 16, the first switch valve 15 is opened.

[0119] See Figure 7When the electric mixing valve 12 is opened, cold water and hot water are mixed at the electric mixing valve 12. The mixed water is output from the mixed water output terminal 30 of the electric mixing valve 12. The mixed water passes through the temperature sensor 33 in the connecting seat 13 along the flow regulating valve 14. If the temperature sensor 33 detects that the water temperature reaches the set temperature value, the third switch valve 19 is closed. In the absence of power interruption, when the user needs to use the overhead shower head 18, the second switch valve 17 is opened.

[0120] See Figure 8 When the electric mixing valve 12 is opened, cold water and hot water are mixed at the electric mixing valve 12. The mixed water output terminal 30 of the electric mixing valve 12 outputs mixed water. The mixed water passes through the temperature sensor 33 in the connecting seat 13 along the flow regulating valve 14. If the temperature sensor 33 detects that the outlet water temperature reaches the set temperature value, the third switch valve 19 is closed. In the absence of power interruption, when the user needs to use the outlet pipe 23 of the water storage tank 20 to output water, the drain valve 24 is closed to prevent the cold water from the water storage tank 20 from being output to the outlet pipe 23. The fourth switch valve 25 is opened, and the mixed water is output to the outlet pipe 23 along the inlet pipe 26. The end of the inlet pipe 26 is inserted into the side of the outlet pipe 23. The end of the inlet pipe 26 is located close to the outlet end of the outlet pipe 23. The drain valve 24 is located close to the inlet end of the outlet pipe 23.

[0121] See Figure 9 The level sensor 22 is mounted on the top of the water storage tank 20 via a bracket, with its probe facing inwards. When the level sensor 22 detects a high water level in the tank, the drain valve 24 opens, allowing the liquid in the tank to flow through the drain valve 24 to the outlet pipe 23. The water storage tank 20 has a wiring hole for the level sensor 22, which is connected to the circuit board inside the control box 27 via a wire.

[0122] In this embodiment, the hot and cold water mixing device 3 includes a cold water output terminal 32 and a hot water output terminal 31. The cold water inlet of the electric mixing valve 12 and the cold water inlet of the manual mixing valve 6 are connected to the cold water output terminal 32, and the hot water inlet of the electric mixing valve 12 and the hot water inlet of the manual mixing valve 6 are connected to the hot water output terminal 31.

[0123] See Figure 10 When there is a power outage, the manual mixing valve 6 is opened, and cold water and hot water flow to the manual mixing valve 6 of the cold and hot water mixing inlet device 3. The cold water and hot water are mixed in the manual mixing valve 6. The output end of the manual mixing valve 6 is connected to the inlet end of the hand shower 16, and the hand shower 16 outputs water.

[0124] In this embodiment, the housing 7 is provided with an installation cavity, the connector 2 is fixed in the housing 7 by a bracket and screws, and the water storage tank 20 is fixed in the housing 7 by screws.

[0125] In this embodiment, the water outlet of the water storage tank 20 is located at the bottom of the inner bottom wall of the water storage tank 20, and the water outlet of the water storage tank 20 is connected to the water outlet pipe 23.

[0126] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A cold water recovery device for a hot water system, characterized in that: It includes a water storage tank (20) connected to the hot water system output, a cold water delivery structure (28), and a hot water delivery structure (29); the cold water remaining on the hot water system pipe enters the water storage tank (20) through the hot water system output and the cold water delivery structure (28); The water storage tank (20) is provided with a water outlet pipe (23) connected to the hot water delivery structure (29), and a drain valve (24) is provided on the water outlet pipe (23). The drain valve (24) opens and drains the liquid from the water storage tank (20); when the drain valve (24) closes, the hot water from the hot water system is transported to the outlet pipe (23) of the water storage tank (20) through the hot water conveying structure (29), so that the hot water outlet end and the drainage structure of the water storage tank (20) are integrated on the same outlet pipe (23).

2. The cold water recovery device for the hot water system according to claim 1, characterized in that: The connection between the hot water delivery structure (29) and the outlet pipe (23) is located below the drain valve (24). When the outlet pipe (23) outputs hot water alone, the drain valve (24) blocks the drain outlet of the water storage tank (20) on the outlet pipe (23) to prevent the liquid from the water storage tank (20) from being output to the outlet pipe (23).

3. The cold water recovery device for the hot water system according to claim 1, characterized in that: The water storage tank (20) is equipped with a liquid level sensor (22) for detecting the liquid position in the water storage tank (20). When the liquid level sensor (22) detects that the liquid in the water storage tank (20) has reached the corresponding liquid position height, the drain valve (24) opens. Alternatively, when the liquid level in the water tank (20) reaches the level sensor (22), the water tank (20) will no longer receive water.

4. The cold water recovery device for the hot water system according to claim 3, characterized in that: The water storage tank (20) is provided with a fixed bracket (30) on the inner top wall. The liquid level sensor (22) is fixed on the fixed bracket (30), and the probe of the liquid level sensor (22) faces the inside of the water storage tank (20). The water storage tank (20) has a wire hole on its inner top wall.

5. The cold water recovery device for the hot water system according to claim 1, characterized in that: A third switch valve (19) is provided between the output end of the hot water system and the input end of the cold water conveying structure (28). When the third switch valve (19) is opened, the cold water remaining on the hot water system pipe passes through the third switch valve (19) and the cold water conveying structure (28) and enters the water storage tank (20).

6. The cold water recovery device for the hot water system according to claim 5, characterized in that: Before the hot water system output end supplies hot water to the hot water delivery structure (29), the third switch valve (19) is opened for a corresponding set time to collect the cold water remaining on the hot water system pipe; Alternatively, the hot water system output terminal is provided with a first temperature sensor (35) for detecting liquid temperature. When the first temperature sensor (35) detects that the liquid temperature at the hot water system output terminal is lower than the set temperature value, the third switch valve (19) opens.

7. The cold water recovery device for the hot water system according to claim 1, characterized in that: A fourth switch valve (25) is provided between the output end of the hot water system and the input end of the hot water delivery structure (29). When the fourth switch valve (25) is opened, the hot water of the hot water system is delivered to the outlet pipe (23) of the water storage tank (20) through the fourth switch valve (25) and the hot water delivery structure (29).

8. The cold water recovery device for the hot water system according to claim 1, characterized in that: The drain valve (24) is an electric drain valve. When the power is off, the electric drain valve is in a closed state and blocks the liquid in the water tank (20) from being discharged to the outlet pipe (23); or, the drain valve (24) is a power-off switch valve. When the power is off, the drain valve (24) is in an open state and discharges the liquid in the water tank (20) to the outlet pipe (23).

9. The cold water recovery device for the hot water system according to claim 1, characterized in that: The water storage tank (20) is provided with a cold water inlet, and the output end of the cold water conveying structure (28) is connected to the cold water inlet.

10. The cold water recovery device for the hot water system according to claim 1, characterized in that: The water storage tank (20) is provided with an installation hole for installing the water outlet pipe (23). The installation hole is located on the bottom of the water storage tank (20), and the drain valve (24) is located on the outer side of the bottom of the water storage tank (20).

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