An integrated backwater device

Abstract

The utility model provides an integrated water return device, including booster pump, temperature sensor, check valve, solenoid valve and control module, booster pump, temperature sensor and solenoid valve all are electrically connected with control module, booster pump is provided with first inlet pipe, second inlet pipe and first outlet pipe, solenoid valve is equipped with second outlet pipe, third outlet pipe and third inlet pipe, first outlet pipe is connected with third inlet pipe, temperature sensor sets up on the pump head of booster pump, check valve sets up in first outlet pipe or third inlet pipe, the utility model has the characteristics of reasonable structure design.

Description

Technical Field

[0001] This utility model relates to heating, ventilation and air conditioning equipment, and in particular, to an integrated water return device. Background Technology

[0002] Currently, the market share of household gas water heaters and air source heat pump water heaters exceeds hundreds of millions of units, with over ten million new installations added annually. However, due to safety concerns, gas water heaters are typically installed in kitchens or on balconies, while air source heat pump water heaters are usually installed on outdoor platforms. Therefore, hot water needs to be delivered from the heat source to the bathroom via pipes, a distance ranging from seven or eight meters to tens of meters. When the user stops using hot water, the water in these pipes gradually cools down, especially in winter when the cooling rate is accelerated. When the user wants to use hot water again, they must first drain the cold water from these pipes before hot water is available. This wastes water resources and the user's time, resulting in a poor user experience.

[0003] Currently, in new home renovations or during construction by developers, the aforementioned problem is addressed by pre-laying a return water pipe and installing a return water pump on it. For households without a return water pipe, the market primarily addresses this by installing an H-valve at the end to connect the hot and cold water pipes, and then using a return water pump or a zero-cold-water gas water heater. Existing H-valve technologies include ordinary H-valve and thermostatic H-valve. While ordinary H-valves have a check function, preventing cold water from flowing into hot water, they cannot prevent hot water from flowing into cold water. Thermostatic H-valves, on the other hand, rely on the thermal expansion and contraction of a temperature-sensing element to open and close the valve. The valve automatically closes when the temperature is reached and reopens as the temperature drops. However, the return water pump cannot obtain a temperature signal, resulting in a significant amount of time that cold and hot water are connected, failing to effectively solve the cross-contamination problem.

[0004] In addition, existing technologies have also been disclosed to solve the above problems by installing a return water pump at the heat source end and an automatic thermostatic valve at the end of the household water supply, and using wireless signal transmission and reception communication. However, since the distance between the end of the household water supply and the heat source end is generally long, and there may even be several walls, general wireless signals such as 433, 315 or Bluetooth signals may not be able to communicate effectively. Using a Wi-Fi module may be relatively better, but no matter which communication method is used, an additional wireless module is required, and two on-site installations are required, which is relatively complicated to operate and has low user acceptance. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide an integrated water return device with a reasonable structural design.

[0006] To achieve the above object, the technical solution of the utility model is as follows:

[0007] An integrated return water device includes a booster pump, a temperature sensor, a check valve, a solenoid valve and a control module. The booster pump, the temperature sensor and the solenoid valve are all electrically connected to the control module; the booster pump is configured with a first water inlet pipe, a second water inlet pipe and a first water outlet pipe; the solenoid valve is provided with a second water outlet pipe, a third water outlet pipe and a third water inlet pipe; the first water outlet pipe is communicated with the third water inlet pipe; the temperature sensor is arranged on the pump head of the booster pump, and the check valve is arranged in the first water outlet pipe or the third water inlet pipe.

[0008] Preferably, the first water outlet pipe and the third water inlet pipe are in plug-in fit.

[0009] Preferably, a plug-in part is arranged on the outer side of the first water outlet pipe, and a plug-in groove adapted to the plug-in part is arranged on the third water inlet pipe; a first annular groove is arranged on the outer side of the plug-in part along the circumferential direction, and a first sealing ring is arranged in the first annular groove.

[0010] Preferably, a locking component for preventing the relative axial movement of the plug-in part and the plug-in groove is arranged on the third water inlet pipe.

[0011] Preferably, a second annular groove is further arranged between the valve body and the third water inlet pipe on the outer side of the plug-in part;

[0012] The locking component includes a bolt. A pin hole is vertically penetrated through the position corresponding to the first annular groove in the plug-in groove along the central axis of the third water inlet pipe, and the bolt is movably inserted into the pin hole; the front end of the bolt extends into the second annular groove to fix the plug-in part in the plug-in slot; there are two pin holes arranged symmetrically left and right, and the bolt is in a "冂" shape.

[0013] Preferably, a limit seat for restricting the separation of the bolt and the pin hole is further arranged on the outer side of the third water inlet pipe.

[0014] Preferably, it further includes a bottom cover and a shell which are detachably connected to each other;

[0015] Installation clamping rings are arranged on the outer sides of the first water inlet pipe, the second water inlet pipe, the second water outlet pipe and the third water outlet pipe. A pressing block adapted to the installation clamping ring is arranged on the side surface of the bottom cover, and a bayonet adapted to the installation clamping ring is arranged at the corresponding position of the shell. The pressing block enters the bayonet to press the installation clamping ring tightly in the bayonet.

[0016] Preferably, a third annular groove is arranged on the installation clamping ring, and a second sealing ring is nested in the third annular groove.

[0017] Preferably, it further includes a wireless remote control, and the wireless remote control communicates with the control module wirelessly.

[0018] The main technical effects of this utility model are reflected in the following aspects:

[0019] The integrated water return system is designed for installation at a single point of contact in a household water system. It features a single installation point, making installation convenient and its structure simple. The first and second inlet pipes connect to the hot water pipe and hot water faucet, respectively, while the second and third outlet pipes connect to the cold water pipe and cold water faucet, respectively. In operation, when the temperature sensor detects a temperature below a preset threshold, the water return pump is activated and the solenoid valve opens, transporting water from the hot water pipe to the cold water pipe. After passing through a heat source (gas water heater or air source heat pump storage tank), the water returns to the water return pump, forming a cycle. When the temperature sensor detects a temperature reaching the preset threshold, the water return pump stops and the solenoid valve closes. The closing of the solenoid valve effectively prevents hot water from flowing back to cold water, while the built-in check valve effectively prevents cold water from flowing back to hot water. This integrated water return system eliminates the need for an H-valve, integrating the water return pump to the end point. The dual inlet design of the water return pump and the dual outlet design of the solenoid valve significantly reduces costs, makes installation more convenient, and improves performance.

[0020] The overall design is compact and easy to assemble and disassemble. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the integrated water return device in the embodiment;

[0022] Figure 2 This is an exploded structural diagram of the integrated water return device in the embodiment.

[0023] Figure 3 This is a schematic diagram of the installation of the booster pump and solenoid valve in the embodiment;

[0024] Figure 4 for Figure 3 Enlarged view of part A in the middle.

[0025] Reference numerals: 1. Bottom cover; 11. Pressure block; 21. Housing; 211. Bayonet; 22. Transparent cover; 223. Booster pump; 31. First inlet pipe; 32. Second inlet pipe; 33. First outlet pipe; 331. First annular groove; 332. Second annular groove; 34. Mounting hole; 4. Solenoid valve; 41. Third inlet pipe; 411. Slot; 42. Second outlet pipe; 43. Third outlet pipe; 5. Pin; 6. Mounting retaining ring; 61. Third annular groove; 7. Limiting seat. Detailed Implementation

[0026] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0027] Reference Figure 1 、 Figure 2 In this embodiment, an integrated return water device is provided, which includes a bottom cover 1, an upper cover, a booster pump 223, a temperature sensor, a check valve, a solenoid valve 4, a wireless remote control and a control module. The booster pump 223, the temperature sensor and the solenoid valve 4 are all electrically connected to the control module. The wireless remote control communicates with the control module wirelessly, and the communication method can be Wifi, Bluetooth, 433 / 315 or zigbee.

[0028] The booster pump 223 is configured with a first water inlet pipe 31, a second water inlet pipe 32 and a first water outlet pipe 33, that is, the first water inlet pipe 31, the second water inlet pipe 32 and the first water outlet pipe 33 are all connected to the inside of the pump cavity; the solenoid valve 4 is provided with a second water outlet pipe 42, a third water outlet pipe 43 and a third water inlet pipe 41, that is, the second water outlet pipe 42, the third water outlet pipe 43 and the third water inlet pipe 41 are all connected to the inside of the valve body. The first water outlet pipe 33 is connected to the third water inlet pipe 41. In this embodiment, the connection is by plug-in fit. Of course, other connection methods can also be used.

[0029] An installation hole 34 is provided on the pump head of the booster pump 223, and the temperature sensor is arranged in the installation hole 34. The temperature sensor can detect the temperature of the fluid in real time and send a corresponding detection signal to the control module.

[0030] A check valve (not shown) is arranged in the first water outlet pipe 33 or the third water inlet pipe 41, which can prevent the liquid from flowing back.

[0031] The specific structure of the plug-in fit between the first water outlet pipe 33 and the third water inlet pipe 41 is: a plug-in part is arranged on the outer side of the first water outlet pipe 33, and a plug-in groove adapted to the plug-in part is arranged on the third water inlet pipe 41; a first annular groove 331 is arranged on the outer side of the plug-in part along the circumferential direction, and a first sealing ring is arranged in the first annular groove 331.

[0032] A locking component is arranged on the third water inlet pipe 41 to prevent the relative axial movement of the plug-in part and the plug-in groove. Specifically, the locking component includes a bolt 5, and the bolt 5 is in the shape of a "冂".

[0033] At the same time, a second annular groove 332 is also arranged on the outer side of the plug-in part and between the valve body and the third water inlet pipe 41; a pin hole is vertically penetrated through the position corresponding to the second annular groove 332 in the plug-in groove along the central axis of the third water inlet pipe 41, and there are two pin holes which are symmetrically arranged left and right. The bolt 5 is movably inserted into the pin hole. In this way, when the front end of the bolt 5 extends into the second annular groove 332, the plug-in part can be fixed in the plug-in slot 411.

[0034] Additionally, a limiting seat 7 is provided on the outside of the third water inlet pipe 41 to prevent the pin 5 from disengaging from the pin hole. The top of the limiting seat 7 has a barb, and the front side of the barb has a guide slope. After the pin 5 is inserted into the pin hole to a certain depth, the guide slope presses against the barb, causing the barb to bend backward and continue to move. When the pin 55 passes the barb, the barb springs back and hooks the pin 5, at which point the pin 5 cannot move upward.

[0035] The top cover includes a housing 21 and a transparent cover 22, with the housing 21 snapping into the transparent cover 22. Mounting rings 6 are provided on the outer sides of the first inlet pipe 31, the second inlet pipe 32, the second outlet pipe 42, and the third outlet pipe 43. A pressure block 11, adapted to the mounting ring 6, is provided on the side of the bottom cover 1. A slot 211, adapted to the mounting ring 6, is provided on the housing 21 corresponding to the pressure block 11. The pressure block 11 enters the slot 211, pressing the mounting ring 6 tightly within it. A third annular groove 61 is provided on the mounting ring 6, and a second sealing ring is nested within the third annular groove 61. During installation, the second sealing ring is first inserted into place, then the mounting ring 6 is snapped into the slot 211, and then the housing 21 is fastened to the bottom cover 1, causing the pressure block 11 to also enter the slot 211 and press tightly against the mounting ring 6. The second sealing ring prevents resonance between the pump and the housing, reducing noise during pump startup.

[0036] The housing 21 includes an upper cover body and a transparent cover 22. The upper cover body has several through holes. The control module includes operation buttons and a display unit, which extend through the through holes. The transparent cover 22 covers the through holes, providing a seal, and the operation buttons are fitted into the transparent cover 22. The operation buttons are capacitive buttons, allowing the user to activate them simply by touching the surface of the transparent cover 22.

[0037] In this embodiment, the "return water device" is installed at the end of the household hot water circulation system, that is, between the hot and cold water pipes in the farthest bathroom. The first inlet pipe 31 and the second inlet pipe 32 are used to connect the end hot water pipe and the hot water point. The second outlet pipe 42 and the third outlet pipe 43 are used to connect the end cold water pipe and the cold water point.

[0038] Working principle: When the temperature sensor detects that the current temperature is lower than the preset start threshold, the water return device is activated, which pumps cold water from the hot water pipe into the cold water pipe and returns it to the hot water pipe through the heating source, forming a cycle; when the temperature sensor detects that the current temperature has reached the preset stop threshold, the water return device is stopped.

[0039] The aforementioned solenoid valve 4 serves to isolate water from the hot and cold water pipes from entering the cold water pipe when the return water device is not working.

[0040] The aforementioned check valve serves to prevent water from the cold water pipe from flowing into the hot water pipe when the return valve is not in operation.

[0041] Users can use a wireless remote control to remotely control the water return process.

[0042] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. An integrated water return device, comprising a booster pump (223), a temperature sensor, a solenoid valve (4), and a control module, wherein the booster pump (223), the temperature sensor, and the solenoid valve (4) are all electrically connected to the control module; characterized in that, The booster pump (223) is configured with a first water inlet pipe (31), a second water inlet pipe (32) and a first water outlet pipe (33); the solenoid valve (4) is provided with a second water outlet pipe (42), a third water outlet pipe (43) and a third water inlet pipe (41); the first water outlet pipe (33) is communicated with the third water inlet pipe (41); the temperature sensor is arranged on the pump head of the booster pump (223).

2. The integrated water return device according to claim 1, characterized in that, A check valve is further included, and the check valve is arranged in the first water outlet pipe (33) or the third water inlet pipe (41).

3. The integrated water return device according to claim 1, characterized in that, The first water outlet pipe (33) is in plug-in fit with the third water inlet pipe (41).

4. The integrated water return device according to claim 3, characterized in that, A plug-in part is arranged on the outer side of the first water outlet pipe (33), and a plug-in groove adapted to the plug-in part is arranged on the third water inlet pipe (41); a first annular groove (331) is arranged on the outer side of the plug-in part along the circumferential direction, and a first sealing ring is arranged in the first annular groove (331).

5. An integrated water return device according to claim 2, 3, or 4, characterized in that, A locking component is arranged on the third water inlet pipe (41) for preventing the relative axial movement of the plug-in part and the plug-in groove.

6. The integrated water return device according to claim 5, characterized in that, A second annular groove (332) is further arranged between the valve body and the third water inlet pipe (41) on the outer side of the plug-in part. The locking component includes a bolt (5), a pin hole is vertically penetrated through the third water inlet pipe (41) corresponding to the position of the first annular groove (331) in the plug-in groove, and the bolt (5) is movably inserted into the pin hole; the front end of the bolt (5) extends into the second annular groove (332) to fix the plug-in part in the plug-in slot (411); there are two pin holes which are symmetrically arranged left and right, and the bolt (5) is in a "冂” shape.

7. An integrated water return device according to claim 3, characterized in that, A limit seat (7) for restricting the separation of the bolt (5) from the pin hole is further arranged on the outer side of the third water inlet pipe (41).

8. An integrated water return device according to claim 1, characterized in that, A bottom cover (1) and a housing (21) which are detachably connected to each other are further included. Installation clamping rings (6) are arranged on the outer sides of the first water inlet pipe (31), the second water inlet pipe (32), the second water outlet pipe (42) and the third water outlet pipe (43), a pressing block (11) adapted to the installation clamping ring (6) is arranged on the side surface of the bottom cover (1), a bayonet (211) adapted to the installation clamping ring (6) is arranged at the corresponding position of the housing (21) to the pressing block (11), and the pressing block (11) enters the bayonet (211) to press the installation clamping ring (6) in the bayonet (211).

9. An integrated water return device according to claim 8, characterized in that, A third annular groove (61) is arranged on the installation clamping ring (6), and a second sealing ring is nested in the third annular groove (61).

10. An integrated water return device according to claim 1, characterized in that, A wireless remote controller is further included, and the wireless remote controller communicates with the control module wirelessly.

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