Zero cold water supply system

Abstract

The utility model discloses a zero cold water supply system, which belongs to the technical field of heat supply and comprises a water heater, a water supply pipeline and a wireless temperature feedback device. A water inlet and a water outlet are formed in the water heater; the water supply pipeline comprises a cold water pipe and a hot water pipe, the first end of the cold water pipe is connected with the water inlet, the first end of the hot water pipe is connected with the water outlet, and the second end of the cold water pipe is communicated with the second end of the hot water pipe; the wireless temperature feedback device is arranged at the second end, away from the water heater, of the hot water pipe and is in communication connection with the water heater, and the wireless temperature feedback device is used for detecting the output water temperature of the second end of the hot water pipe and can send detected water temperature data to the water heater. According to the utility model, short heating time and energy conservation can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of heating, in particular to a zero - cold - water water supply system. Background Art

[0002] A gas water heater, also known as a gas hot water furnace, refers to a gas appliance that uses gas as fuel and transfers heat to the cold water flowing through a heat exchanger through combustion heating to achieve the purpose of preparing hot water.

[0003] A zero - cold - water gas water heater is a type of gas water heater. It can quickly provide hot water at a constant temperature after startup without going through a pre - heating process. It avoids the problem of discharging a certain amount of cold water when using a traditional gas water heater, and is energy - saving, environmentally friendly, convenient and practical.

[0004] The principle of realizing "zero cold water" in the existing zero - cold - water gas water heaters is as follows: controlling the start and stop of circulating heating according to the inlet water temperature and the outlet water temperature, so that the water temperature in the entire circulating pipeline reaches the set temperature. Generally speaking, a zero - cold - water gas water heater includes a hot water pipe and a cold water pipe. The water heater heats the water and transports the heated water to the hot water pipe. The water in the hot water pipe returns to the water heater through the cold water pipe. When the water temperatures in both the hot water pipe and the cold water pipe reach the set temperature, the heating is completed.

[0005] However, when a user needs to use hot water, what is actually used is the hot water in the hot water pipeline. The existing zero - cold - water gas water heaters heat the water in the entire circulating pipeline. After the water temperature in the hot water pipe reaches the standard, the hot water in the hot water pipe will continue to flow into the cold water pipe, heating the water in the entire circulating pipeline to the standard. This leads to technical problems such as energy waste and a long heating time. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a zero - cold - water water supply system, which can not only meet the function of instant hot water for users, but also achieve a short heating time and energy conservation.

[0007] With the above concept, the technical solution adopted by the utility model is as follows:

[0008] A zero - cold - water water supply system, comprising:

[0009] A water heater, which is provided with an inlet and an outlet;

[0010] A water supply pipeline, including a cold water pipe and a hot water pipe. The first end of the cold water pipe is connected to the inlet, the first end of the hot water pipe is connected to the outlet, and the second ends of the cold water pipe and the hot water pipe are communicated;

[0011] A wireless temperature feedback device is arranged at the second end of the hot water pipe away from the water heater and is communicatively connected to the water heater. The wireless temperature feedback device is used to detect the output water temperature at the second end of the hot water pipe and can send the detected water temperature data to the water heater.

[0012] Optionally, the wireless temperature feedback device includes a first wireless module and a water temperature detection sensor. The water temperature detection sensor is used to detect the output water temperature at the second end of the hot water pipe. The water temperature detection sensor is communicatively connected to the first wireless module, and the first wireless module is communicatively connected to the water heater.

[0013] Optionally, a second wireless module is arranged on the water heater. The second wireless module and the first wireless module can be wirelessly connected to receive the data detected by the water temperature detection sensor.

[0014] Optionally, the zero - cold - water supply system further includes a check valve. The check valve is connected between the second end of the cold water pipe and the second end of the hot water pipe. The wireless temperature feedback device is arranged on the check valve.

[0015] Optionally, the check valve includes a water three - way valve, a connecting pipe, a one - way valve, and a cold - water three - way valve. The input port of the hot - water three - way valve is connected to the second end of the hot water pipe. The first end of the connecting pipe is connected to the first output port of the hot - water three - way valve. The second end of the connecting pipe is connected to the input port of the one - way valve. The output port of the one - way valve is connected to the input port of the cold - water three - way valve. The first output port of the cold - water three - way valve is connected to the second end of the cold water pipe. The wireless temperature feedback device is arranged on the connecting pipe.

[0016] Optionally, a power supply is arranged inside the connecting pipe. The power supply is used to supply power to the first wireless module.

[0017] Optionally, a circuit board is arranged on the connecting pipe. The circuit board includes a rectification circuit and a first voltage - stabilizing circuit connected in sequence. The power supply is connected to the input end of the rectification circuit, and the output end of the first voltage - stabilizing circuit is connected to the first wireless module.

[0018] Optionally, a first indicator light is arranged on the outer surface of the connecting pipe. The first indicator light is connected to the first wireless module.

[0019] Optionally, a first pairing key is arranged on the outer surface of the connecting pipe. The first pairing key is connected to the first wireless module.

[0020] Optionally, the zero - cold - water supply system includes an end - use structure. The end - use structure can be communicated with the second end of the hot water pipe.

[0021] Advantages of the present utility model:

[0022] When the zero - cold - water supply system proposed by the present utility model pre - heats the water in the water supply pipeline, the water supply pipeline serves as a circulation pipeline. When the zero - cold - water supply system starts pre - heating, the water heater heats the water in the circulation pipeline, and the water in the circulation pipeline flows along the hot water pipe to the cold water pipe. When the hot water flows out from the second end of the hot water pipe, the wireless temperature feedback device can detect the output water temperature at the second end of the hot water pipe (the second end of the hot water pipe is the water outlet of the hot water pipe far from the water heater). When the output water temperature at the second end of the hot water pipe reaches the qualified standard, it means that the water temperature in the hot water pipe reaches the qualified standard. At this time, controlling the water heater to stop heating is sufficient. Although the temperature in the cold water pipe has not reached the qualified standard at this time, the water heater does not need to continue heating the circulation pipeline, which improves the heating speed and avoids energy waste.

[0023] The wireless temperature feedback device is used to detect the water temperature at the second end of the hot water pipe and wirelessly transmit the water temperature data at the second end of the hot water pipe to the water heater, ensuring that the heating operation of the water heater can be stopped when the outlet water temperature of the hot water pipe reaches the qualified standard. Moreover, the wireless temperature feedback device can simplify the circuit structure of the zero - cold - water supply system and facilitate the installation of the zero - cold - water supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the following - described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the embodiments of the present utility model and these drawings.

[0025] Figure 1 is a schematic structural diagram of the zero - cold - water supply system provided by the embodiment of the present utility model;

[0026] Figure 2 is Figure 1 a partial structural diagram of;

[0027] Figure 3 is a schematic structural diagram of the check valve provided by the embodiment of the present utility model;

[0028] Figure 4 is a schematic structural diagram of the circuit board provided by the embodiment of the present utility model.

[0029] In the figure:

[0030] 1. Water heater; 11. Water inlet; 12. Water outlet; 13. Second wireless module;

[0031] 2. Water supply pipeline; 21. Cold water pipe; 22. Hot water pipe;

[0032] 3. Check valve; 31. Hot water three-way valve; 32. Connecting pipe; 321. First wireless module; 322. Power supply; 323. Water temperature detection sensor; 324. Rectifier circuit; 325. First voltage stabilization circuit; 326. First pairing key; 327. First indicator light; 33. One-way valve; 34. Cold water three-way valve;

[0033] 4. End water-using structure; 41. First connecting pipe; 42. Second connecting pipe; 43. Mixing valve; 44. Outlet pipe;

[0034] 5. Intermediate water-using structure. Detailed implementation manner

[0035] To make the technical problems solved by the present utility model, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the present utility model will be further described below in conjunction with the drawings and through specific implementation manners. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only parts related to the present utility model are shown in the drawings, rather than all of them.

[0036] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0037] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0038] See Figures 1-4 , this embodiment provides a zero-cold-water supply system.

[0039] Specifically, the zero - cold - water supply system includes a water heater 1, a water supply pipeline 2, and a wireless temperature feedback device.

[0040] Among them, the water heater 1 is provided with a water inlet 11 and a water outlet 12.

[0041] The water supply pipeline 2 includes a cold - water pipe 21 and a hot - water pipe 22. The first end of the cold - water pipe 21 is connected to the water inlet 11, the first end of the hot - water pipe 22 is connected to the water outlet 12, and the second ends of the cold - water pipe 21 and the hot - water pipe 22 are communicated.

[0042] It should be noted that the second end of the hot - water pipe 22 is the water outlet end of the hot - water pipe 22 far from the water heater.

[0043] The wireless temperature feedback device is arranged at the second end of the hot - water pipe 22 and is communicatively connected to the water heater 1. The wireless temperature feedback device is used to detect the output water temperature at the second end of the hot - water pipe 22 and can send the detected water - temperature data to the water heater 1.

[0044] When the zero - cold - water supply system provided in this embodiment pre - heats the water in the water supply pipeline 2, the water supply pipeline 2 serves as a circulation pipeline. When the zero - cold - water supply system starts pre - heating, the water heater 1 heats the water in the circulation pipeline. The water in the circulation pipeline flows along the hot - water pipe 22 to the cold - water pipe 21 and then flows through the cold - water pipe 21 into the water heater 1. When the hot water flows out from the second end of the hot - water pipe 22, the wireless temperature feedback device can detect the output water temperature at the second end of the hot - water pipe 22 (the second end of the hot - water pipe is the water outlet of the hot - water pipe 22 far from the water heater 1). When the output water temperature at the second end of the hot - water pipe 22 reaches the qualified standard, it means that the water temperature in the hot - water pipe 22 reaches the qualified standard. At this time, controlling the water heater 1 to stop heating is sufficient. Although the temperature in the cold - water pipe has not reached the qualified standard at this time, the water heater does not need to continue heating the circulation pipeline, which improves the heating speed and avoids energy waste.

[0045] Using the wireless temperature feedback device to detect the water temperature at the second end of the hot - water pipe 22 and wirelessly send the water - temperature data at the second end of the hot - water pipe 22 to the water heater 1 can ensure that the heating operation of the water heater 1 stops when the outlet water temperature of the hot - water pipe reaches the qualified standard. Moreover, the wireless temperature feedback device can simplify the circuit structure of the zero - cold - water supply system and facilitate the installation of the zero - cold - water supply system.

[0046] Specifically, in this embodiment, the wireless temperature feedback device includes a first wireless module 321 and a water - temperature detection sensor 323. The water - temperature detection sensor 323 is used to detect the output water temperature at the second end of the hot - water pipe 22. The water - temperature detection sensor 323 is communicatively connected to the first wireless module 321, and the first wireless module 321 is communicatively connected to the water heater 1.

[0047] Optionally, when the data detected by the water temperature detection sensor 323 lasts for a set time longer than the preset value, it is considered that the water temperature in the hot water pipe 22 reaches the qualified standard.

[0048] Optionally, the water temperature detection sensor 323 performs real-time detection and periodically feeds back the detected water temperature to the water heater 1.

[0049] Specifically, the internal structure of the water temperature detection sensor 323 is a thermistor. When the water temperature changes, the internal resistance value of the water temperature detection sensor 323 changes, and the current value also changes, realizing the detection of the water temperature.

[0050] Furthermore, a second wireless module 13 is provided on the water heater 1. The second wireless module 13 and the first wireless module 321 can be wirelessly connected to receive the data detected by the water temperature detection sensor 323. It should be noted that the implementation program of the wireless communication between the second wireless module 13 and the first wireless module 321 belongs to the prior art, and the specific implementation program will not be introduced in detail.

[0051] When the data received by the second wireless module 13 from the water temperature detection sensor 323 meets the qualified standard, the water heater 1 stops pre-cycle heating.

[0052] To prevent the water in the cold water pipe 21 from flowing into the hot water pipe 22 and interfering with the water temperature in the hot water pipe 22 when the water heater 1 heats the water supply pipeline 2, in this embodiment, the zero cold water supply system further includes a check valve 3. The check valve 3 is connected between the second end of the cold water pipe 21 and the second end of the hot water pipe 22, and the wireless temperature feedback device is arranged on the check valve 3.

[0053] Specifically, referring to Figure 2 , in this embodiment, the check valve 3 includes a hot water three-way valve 31, a connecting pipe 32, a one-way valve 33, and a cold water three-way valve 34. The input port of the hot water three-way valve 31 is connected to the second end of the hot water pipe 22. The first end of the connecting pipe 32 is connected to the first output port of the hot water three-way valve 31. The second end of the connecting pipe 32 is connected to the input port of the one-way valve 33. The output port of the one-way valve 33 is connected to the input port of the cold water three-way valve 34. The first output port of the cold water three-way valve 34 is connected to the second end of the cold water pipe 21, and the wireless temperature feedback device is arranged on the connecting pipe 32.

[0054] When the zero - cold - water supply system starts pre - heating, the water heater 1 heats the water in the circulation pipeline. The water in the circulation pipeline flows along the hot water pipe 22 to the check valve 3, and then flows from the check valve 3 to the cold water pipe 21. When the hot water at the second end of the hot water pipe 22 flows to the hot water three - way valve 31, the water temperature detection sensor 323 can detect the output water temperature of the hot water three - way valve 31. When the output water temperature of the hot water three - way valve 31 reaches the qualified standard, it indicates that the water temperature in the hot water pipe 22 reaches the qualified standard. At this time, the water heater 1 can be controlled to stop heating. Although the temperature in the cold water pipe 21 has not reached the qualified standard at this time, the water heater 1 does not need to continue heating the circulation pipeline, which improves the heating speed and avoids energy waste.

[0055] Further, a power supply 322 is arranged inside the connecting pipe 32, and the power supply 322 is used to supply power to the first wireless module 321.

[0056] Specifically, the first wireless module 321 is arranged on the outer surface of the connecting pipe 32. Both the power supply 322 and the water temperature detection sensor 323 are located inside the connecting pipe 32 and are in contact with the water inside the connecting pipe 32.

[0057] It should be noted that the program for the power supply 322 to supply power to the first wireless module 321, the water temperature detection sensor 323 to transmit the detected data to the first wireless module 321, and the first wireless module 321 to send the data detected by the water temperature detection sensor 323 to the water heater 1 all belong to the prior art, and the implementation principle thereof will not be specifically introduced here.

[0058] Further, a circuit board is arranged on the connecting pipe 32. The circuit board includes a rectification circuit 324 and a first voltage - stabilizing circuit 325 connected in sequence. The power supply 322 is connected to the input end of the rectification circuit 324, and the output end of the first voltage - stabilizing circuit 325 is connected to the first wireless module 321.

[0059] Specifically, the circuit board is arranged on the outer surface of the connecting pipe 32, and the output wire of the power supply 322 is hermetically passed through the connecting pipe 32 and connected to the input end of the rectification circuit 324.

[0060] Optionally, the power supply 322 is a water - flow generator or a thermoelectric generator.

[0061] Preferably, in this embodiment, the power supply 322 is a water - flow generator. When the water flows in the connecting pipe 32, the turbine of the water - flow generator rotates to generate voltage for the circuit board. After passing through the rectification circuit 324 and the first voltage - stabilizing circuit 325, it is output to the first wireless module 321 for operation.

[0062] Further, a first indicator light 327 is arranged on the outer surface of the connecting pipe 32, and the first indicator light 327 is connected to the first wireless module 321.

[0063] The lighting of the first indicator light 327 indicates that the first wireless module 321 is working properly.

[0064] Further, a first pairing key 326 is provided on the outer surface of the connecting pipe 32, and the first pairing key 326 is connected to the first wireless module 321.

[0065] Preferably, the first indicator light 327 and the first pairing key 326 are integrated onto the first wireless module 321.

[0066] Specifically, when the first pairing key 326 is long-pressed, the first indicator light 327 flashes and pairs with the second wireless module 13 in the pairing state at the same time. If the pairing is successful, the first indicator light 327 remains on; if the pairing times out and fails, the first indicator light 327 goes out.

[0067] Specifically, the working power supply and input voltage of the second wireless module 13 are both supplied by the main control board of the water heater 1, and the data communication between the main control board and the second wireless module 13 adopts the UART method. Preferably, a second pairing key and a second indicator light are provided on the second wireless module 13.

[0068] Optionally, an insertion interface is reserved on the water heater 1, and the second wireless module 13 can be plugged into the insertion interface.

[0069] More specifically, a second voltage stabilizing circuit is connected between the second wireless module 13 and the main control board of the water heater 1. After the second wireless module 13 is connected to the first wireless module 321, the second indicator light remains on; when the second wireless module 13 is not connected to the first wireless module 321, the second indicator light goes out; when the second wireless module 13 and the first wireless module 321 perform one-to-one pairing, the second indicator light flashes.

[0070] When the second pairing key is long-pressed, the second indicator light flashes and pairs with the first wireless module 321; after the pairing is successful, the second indicator light remains on; if the pairing times out and fails, the second indicator light goes out.

[0071] Optionally, the first wireless module 321 is an RF wireless module.

[0072] Further, in order to realize the user's use, the zero cold water supply system includes an end water use structure 4, and the end water use structure 4 can be connected to the second end of the hot water pipe 22, and the hot water output from the second end of the hot water pipe 22 is supplied to the user through the end water use structure 4.

[0073] Specifically, in this embodiment, the end water use structure 4 can be connected to both the second end of the hot water pipe 22 and the second end of the cold water pipe 21.

[0074] Specifically, in this embodiment, the end water - using structure 4 includes a first connecting pipe 41, a second connecting pipe 42, a mixing valve 43, and a water outlet pipe 44. The inlet end of the first connecting pipe 41 is connected to the second outlet of the hot - water three - way valve 31, and the outlet end of the first connecting pipe 41 is connected to the first input port of the mixing valve 43.

[0075] The inlet end of the second connecting pipe 42 is connected to the second outlet of the cold - water three - way valve 34, the outlet end of the second connecting pipe 42 is connected to the second input port of the mixing valve 43, and the output port of the mixing valve 43 is connected to the input port of the water outlet pipe 44.

[0076] When the user takes a bath using the end water - using structure 4, the first connecting pipe 41 supplies hot water to the user.

[0077] Furthermore, the zero - cold - water supply system further includes an intermediate water - using structure 5. Along the flow direction in the hot - water pipe 22, the intermediate water - using structure 5 is located between the first end and the second end of the hot - water pipe 22.

[0078] Optionally, the number of the intermediate water - using structures 5 can be set according to needs. It can be one or two, or others, and no more restrictions are made here.

[0079] The zero - cold - water supply system provided in this embodiment can not only meet the function of instant hot water for users, but also achieve a short heating time and energy conservation.

[0080] Exemplarily, the working process of this zero - cold - water supply system is as follows:

[0081] When the water heater 1 starts the pipeline circulation pre - heating, first, the water pump in the water heater 1 starts to operate. Water flows out from the first end of the hot - water pipe 22, then reaches the second end of the hot - water pipe 22, passes through the check valve 3 and returns to the second end of the cold - water pipe 21, and then enters the water heater 1 from the first end of the cold - water pipe 21 to realize the water - path circulation. The water - flow sensor in the water heater 1 detects the water - flow signal, and the burner of the water heater 1 starts to burn to heat the water. When the water is flowing, the first indicator light 327 of the check valve 3 lights up, and the first wireless module 321 feeds back the temperature at the hot - water three - way valve 31 to the second wireless module 13 of the water heater 1 through the RF wireless signal. The water heater 1 receives the temperature data of the remote water - temperature detection sensor 323. When the temperature data lasts for a set time greater than the preset value, the heating can be stopped. At this time, the water temperature in the cold - water pipe 21 will be lower than the water temperature in the hot - water pipe 22. Adjust the mixing valve 43 to the position of only discharging hot water (that is, at this time, only the first connecting pipe 41 supplies hot water to the user). The hot - water pipe 22 can meet the user's demand for instant hot water, without heating the water temperature in the cold - water pipe 21 to the same as the water temperature in the hot - water pipe 22, which can save heating time and cost.

[0082] It can be understood that when the user wants to mix cold water and hot water for use, the mixing valve 43 is adjusted to the mixing position. The first connecting pipe 41 supplies hot water to the user, and the second connecting pipe 42 supplies cold water to the user. The hot water and cold water are mixed by the mixing valve 43 and then supplied to the user for use.

[0083] The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, there are various changes and modifications to the present invention, and these changes and modifications all fall within the scope of the present invention claimed. The scope of protection claimed for the present invention is defined by the appended claims and their equivalents.

Claims

1. Zero cold water supply system, characterized in that, include: A water heater (1), wherein the water heater (1) is provided with a water inlet (11) and a water outlet (12); A water supply pipeline (2), comprising a cold water pipe (21) and a hot water pipe (22), wherein a first end of the cold water pipe (21) is connected to the water inlet (11), a first end of the hot water pipe (22) is connected to the water outlet (12), and a second end of the cold water pipe (21) is in communication with a second end of the hot water pipe (22); a wireless temperature feedback device, arranged at the second end of the hot water pipe (22) and in communication connection with the water heater (1), the wireless temperature feedback device being used to detect the output water temperature of the second end of the hot water pipe (22) and being capable of sending the detected water temperature data to the water heater (1); The zero cold water supply system further comprises a check valve (3), the check valve (3) being connected between the second end of the cold water pipe (21) and the second end of the hot water pipe (22), and the wireless temperature feedback device being arranged on the check valve (3); The check valve (3) comprises a hot water three-way valve (31), a connecting pipe (32), a one-way valve (33) and a cold water three-way valve (34); the input port of the hot water three-way valve (31) is connected to the second end of the hot water pipe (22); the first end of the connecting pipe (32) is connected to the first output port of the hot water three-way valve (31); the second end of the connecting pipe (32) is connected to the input port of the one-way valve (33); the output port of the one-way valve (33) is connected to the input port of the cold water three-way valve (34); the first output port of the cold water three-way valve (34) is connected to the second end of the cold water pipe (21); and the wireless temperature feedback device is arranged on the connecting pipe (32).

2. The zero cold water supply system according to claim 1, characterized in that: The wireless temperature feedback device comprises a first wireless module (321) and a water temperature detection sensor (323), wherein the water temperature detection sensor (323) is used to detect the output water temperature of the second end of the hot water pipe (22), the water temperature detection sensor (323) is communicatively connected to the first wireless module (321), and the first wireless module (321) is communicatively connected to the water heater (1).

3. The zero cold water supply system according to claim 2, characterized in that: The water heater (1) is provided with a second wireless module (13), and the second wireless module (13) and the first wireless module (321) can be wirelessly connected to receive data detected by the water temperature detection sensor (323).

4. The zero cold water supply system according to claim 2, characterized in that: A power source (322) is provided in the connecting tube (32), and the power source (322) is used to supply power to the first wireless module (321).

5. The zero cold water supply system according to claim 4, characterized in that: A circuit board is arranged on the connecting tube (32), and the circuit board comprises a rectifier circuit (324) and a first voltage stabilizing circuit (325) which are connected in sequence, the power supply (322) is connected to the input end of the rectifier circuit (324), and the output end of the first voltage stabilizing circuit (325) is connected to the first wireless module (321).

6. The zero cold water supply system according to claim 2, characterized in that: A first indicator light (327) is provided on the outer surface of the connecting tube (32), and the first indicator light (327) is connected to the first wireless module (321).

7. The zero cold water supply system according to claim 2, characterized in that: The outer surface of the connecting tube (32) is provided with a first pairing key (326), and the first pairing key (326) is connected to the first wireless module (321).

8. The zero cold water supply system according to any one of claims 1 to 7, characterized in that: The zero cold water supply system comprises a terminal water use structure (4), and the terminal water use structure (4) can be connected to the second end of the hot water pipe (22).

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