Zero-cold-water water heater system

Abstract

The application discloses a zero-cold-water water heater system, which mainly comprises a cold water pipe unit, a heat exchanger unit, a hot water pipe unit, a heat exchange box (4b) and a water mixing tank (411) provided with the hot water pipe unit, a first backwater pipe unit, a second backwater pipe unit, a confluence pipe unit, a multifunctional electromagnetic switch, a wireless control device (15) and a control circuit arrangement scheme, and can completely solve the technical problem that the cold water flowing into the hot water pipe from the gas water heater cannot be heated after the gas water heater is started each time. The technology can also solve the related technical problems of other types of water heaters.

Description

Technical Field

[0001] This invention relates to the field of water heater technology, and in particular to a zero-cold-water water heater system. Background Technology

[0002] Most gas water heaters currently require a short wait for some cold water to flow out before hot water comes out of the tap after being turned on. Users have to constantly check to see when hot water comes out, which can be very inconvenient, especially in cold environments where users are sensitive to cold water. Gas water heaters, including instant water heaters, share a common weakness: some cold water flows into the hot water pipe every time the heater is turned on. Currently known zero-cold-water gas water heater technology uses a pump to draw water from a pre-laid return pipe back to the water heater for preheating before hot water is available for the user. However, if the user turns off the tap while using hot water and then turns it back on, some cold water still flows into the hot water pipe. These technologies cannot prevent the cold water that flows into the hot water pipe after each use from being heated, meaning the user still ends up using cold water. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a zero-cold-water water heater system.

[0004] The technical solution of a zero-cold-water water heater system provided by the present invention includes the following contents.

[0005] The cold water pipe unit is characterized in that: the cold water pipe 2 is arranged in sequence with a cold water inlet connector A, a normally open electric water valve 21, a one-way water valve 22 and a three-way water valve 23, and the outlet of the cold water pipe 2 is connected to the inlet pipe of the heat exchanger 3.

[0006] The normally open electric water valve 21 can either cut off the water flow or allow a small flow of water to pass through after it is closed.

[0007] The three-way water valve 23 is simultaneously connected to the outlet of the combined water pipe 8.

[0008] A heat exchanger unit, characterized in that: a normally closed thermal switch 31 is provided next to the ignition point of the heat exchanger 3; the normally closed thermal switch 31 is characterized in that: when the ignition point is ignited, the normally closed thermal switch 31 automatically opens; when the ignition point is extinguished, the normally closed thermal switch 31 automatically closes.

[0009] Depending on the specific needs, a normally closed pressure switch or a normally closed photosensitive switch may be installed inside the heat exchanger 3 to replace the normally closed thermal switch 31.

[0010] The hot water pipe unit is characterized in that, starting from the position where the hot water pipe 4 connects to the outlet pipe of the heat exchanger 3, the following components are arranged in sequence: a diversion three-way electric water valve A 4a, a heat exchange box 4b, a confluence three-way electric water valve A 4c, a three-way water valve II 4d, a diversion three-way electric water valve B 40, a three-way water valve III 42, a flow switch 43, a temperature control switch 44, a three-way water valve IV 45, a one-way water valve II 46, a three-way water valve V 47, an electric water valve 48, and a connector C for the hot water outlet; the hot water pipe 4 is provided with a first branch 4e and a second branch 41.

[0011] The diversion three-way electric water valve A4a is a three-way water valve with switchable water outlet channels.

[0012] The inlet 4a1 of the diversion three-way electric water valve A is connected to the hot water pipe 4 at its upper end, and the first outlet 4a2 of the diversion three-way electric water valve A is connected to the hot water pipe 4 at its lower end.

[0013] One end of the first branch 4e of the hot water pipe is connected to the second outlet 4a3 of the diversion three-way electric water valve A, and the other end is connected to the three-way water valve 4d.

[0014] The heat exchange box 4b is characterized in that: several flat water pipes 4b2 are arranged inside the heat exchange box 4b, one end of all flat water pipes 4b2 is connected to the inlet 4b21 of the flat water pipe, and the other end of all flat water pipes 4b2 is connected to the outlet 4b22 of the flat water pipe; the water flow channel inside the heat exchange box 4b is divided into the gap space between the inside of the flat water pipes 4b2 and the outside of the flat water pipes 4b2; the inlet 4b21 of the flat water pipe is located inside the heat exchange box 4b, and the inlet 4b21 of the flat water pipe is directly opposite the inlet 4b1 of the heat exchange box; the outlet 4b22 of the flat water pipe extends to the outside of the heat exchange box 4b.

[0015] The inlet 4b1 of the heat exchange box is connected to the hot water pipe 4 at its upper end; the outlet 4b4 of the heat exchange box is connected to the first inlet 4c1 of the combined three-way electric water valve A; the outlet 4b22 of the flat water pipe is connected to the second inlet 4c2 of the combined three-way electric water valve A.

[0016] The combined three-way electric water valve A4c is a three-way electric water valve with switchable water inlet channels. The combined three-way electric water valve A4c is normally open at the first inlet 4c1 or the second inlet 4c2 of the combined three-way electric water valve A.

[0017] The outlet 4c3 of the combined three-way electric water valve A is connected to the hot water pipe 4 at its lower end.

[0018] The diversion three-way electric water valve B40 is a three-way water valve with switchable water outlet channels.

[0019] The inlet 401 of the diversion three-way electric water valve B is connected to the hot water pipe 4 at its upper end, and the first outlet 402 of the diversion three-way electric water valve B is connected to the hot water pipe 4 at its lower end.

[0020] The second branch 41 of the hot water pipe is provided with a water mixing tank 411; the inlet of the water mixing tank 411 is connected to the second outlet 403 of the diversion three-way electric water valve B, and the outlet of the water mixing tank 411 is connected to the three-way water valve 3 42.

[0021] The water mixing tank 411 is characterized in that: a spherical container 412 is preferably provided inside the water mixing tank 411, and the spherical container 412 is provided with diverting pipes 413 of different lengths distributed in all directions; the water flowing in from the inlet of the water mixing tank 411 directly enters the spherical container 412 and then flows into the water mixing tank 411 through the diverting pipes 413, and then flows into the three-way water valve 42 through the outlet of the water mixing tank 411.

[0022] The interior of the water mixing tank 411 is either directly arranged as a rotating wheel or is hollow; the rotating wheel can be electrically driven.

[0023] The temperature control switch 44 is characterized in that: when the temperature inside the hot water pipe 4 drops to a predetermined value, the temperature control switch 44 automatically disconnects; when the temperature inside the hot water pipe 4 rises to a predetermined value, the temperature control switch 44 automatically closes.

[0024] The first return water pipe unit has one end of the connecting pipe 5 connected to the three-way water valve 45 and the other end connected to the first inlet 72 of the confluence three-way electric water valve 72.

[0025] The combined three-way electric water valve B7 is a three-way electric water valve with switchable water inlet channels. The combined three-way electric water valve B7 is normally open at the first inlet 72 of the combined three-way electric water valve B or the second inlet 73 of the combined three-way electric water valve B.

[0026] The second return water pipe unit is characterized in that: the pre-arranged return water pipe D is connected to the return water inlet of the return water pipe 6 via the connector B, and the outlet of the return water pipe 6 is connected to the second inlet 73 of the combined three-way electric water valve B; a normally closed temperature control switch 61 is provided on the return water pipe 6 or the pre-arranged return water pipe D.

[0027] The normally closed temperature control switch 61 automatically opens when heated to a preset temperature value, and automatically closes when it senses that the temperature is lower than the preset temperature value.

[0028] A confluence pipe unit, characterized in that: the inlet of the confluence pipe 8 is connected to the outlet 71 of the confluence three-way electric water valve B 7, and the outlet of the confluence pipe 8 is connected to the three-way water valve 23; the confluence pipe 8 is arranged sequentially from the outlet 71 of the confluence three-way electric water valve B, with a water pump 81, a three-way water valve 6 82 and a one-way water valve 3 83; the confluence pipe 8 is provided with a branch 80; the inlet of the branch 80 is connected to the three-way water valve 6 82, and the outlet is connected to the three-way water valve 5 47; a normally closed electric water valve 801 is provided on the branch 80 of the confluence pipe.

[0029] The multifunctional electromagnetic switch is mainly composed of a rack unit, a stepped shaft unit, a switching unit, and a fixing frame unit.

[0030] The rack unit mainly consists of a moving iron core 132, a compression spring 133, and a rack 134 arranged from left to right; the left section of the rack 134 has a toothed edge 1341, and the right end is provided with a stationary iron core 1342; the toothed edge 1341 meshes with the toothed edge 1373 of the gear disk of the gear pawl flywheel 137.

[0031] The stepped shaft unit is characterized in that: the stepped shaft 136 is arranged from bottom to top with the main components ratchet flywheel 135, gear ratchet flywheel 137, magnet disk 138 and bearing 139; the gear disk of the gear ratchet flywheel 137 has teeth 1373 that mesh with the teeth 1341 of the rack 134.

[0032] The ratchet flywheel 135 is mounted on the mounting plate 1304 of the base 130 of the fixed frame 140, and the bearing 139 is mounted on the bearing mounting plate 1402 of the fixed frame 140; the magnet plate 138 is provided with a bar permanent magnet A 1381 or a bar permanent magnet B 1382.

[0033] The switching unit mainly consists of normally open or normally closed switches arranged opposite to the magnet disk 138; the normally open or normally closed switches are mounted on the mounting bracket 1401 of the normally open switch.

[0034] A preferred arrangement of normally open or normally closed switches around the magnet disk 138, taking the example of setting bar permanent magnet A 1381 and bar permanent magnet B 1382 on the magnet disk 138:

[0035] No switch was initially installed at the point where bar permanent magnet A 1381 and bar permanent magnet B 1382 were directly opposite each other;

[0036] When the magnet disk 138 rotates once, a normally open switch 2km2 is set directly opposite the bar permanent magnet A 1381, and a normally open switch 5km5 is set directly opposite the bar permanent magnet B 1382. At the same time as the magnet disk 138 rotates, the bar permanent magnet A 1381 rotates past the normally open switch 1km1 set on the mounting bracket 1401 of the normally open switch, and the bar permanent magnet B 1382 rotates past the normally open switch 4km4 set on the mounting bracket 1401 of the normally open switch.

[0037] When the magnet disk 138 rotates once more, the bar permanent magnet A 1381 rotates to the initial position of the bar permanent magnet B 1382, and the bar permanent magnet B 1382 rotates to the initial position of the bar permanent magnet A 1381. At the same time as the magnet disk 138 rotates, the bar permanent magnet A 1381 rotates past the normally open switch 3km3 set on the mounting bracket 1401 of the normally open switch, and the bar permanent magnet B 1382 rotates past the normally open switch 6km6 set on the mounting bracket 1401 of the normally open switch.

[0038] The multifunctional electromagnetic switch is characterized in that: because the pawl flywheel 135 has a pawl system, the stepped shaft 136 installed on the pawl flywheel 135 can only rotate counterclockwise; because the gear pawl flywheel 137 has a pawl system, when the rack 134 moves to the right, it simultaneously drives the gear disk 1372 to rotate counterclockwise, causing the stepped shaft 136 and the magnetic disk 138 to rotate counterclockwise; when the rack 134 moves to the left, the gear disk 1372 rotates clockwise, and because the stepped shaft 136 is restricted by the anti-reverse rotation of the pawl flywheel 135, the stepped shaft 136 and the magnetic disk 138 remain stationary at this time;

[0039] When the moving iron core 132 is energized once, the bar permanent magnet A 1381 rotates to the position directly opposite the normally open switch 2km2, turning on the normally open switch 2km2. During this process, normally open switch 1km1 is turned on, and then normally open switch 1km1 is turned off. This causes the bar permanent magnet B 1382 to rotate to the position directly opposite the normally open switch 5km5, turning on the normally open switch 5km5. During this process, normally open switch 4km4 is turned on, and then normally open switch 4km4 is turned off.

[0040] When the moving iron core 132 is energized again, the bar permanent magnet A 1381 rotates to the initial position of the bar permanent magnet B 1382, disconnecting the normally open switch 2km2. During this process, the normally open switch 3km3 is connected, and then disconnected. The bar permanent magnet B 1382 rotates to the initial position of the bar permanent magnet A 1381, disconnecting the normally open switch 5km5. During this process, the normally open switch 6km6 is connected, and then disconnected.

[0041] Wireless control device 15; wireless control device 15 is a control device for controlling a zero-cold-water water heater system by a wireless terminal device or a network terminal device.

[0042] The preferred configuration of the control circuit is as follows.

[0043] The main circuit of normally open electromagnetic switch 3151 is controlled by wireless control device 15;

[0044] The main circuit of the moving iron core 132 of the first multi-functional electromagnetic switch 131a is set on the control circuit of the normally open electromagnetic switch 151.

[0045] The main circuit of the linkage electromagnetic switch group 16 is set in the circuit of the normally open switch 2km2 of the first multi-functional electromagnetic switch 131a; the main circuit of the combined three-way electric water valve B 7 is set in the circuit of the normally open switch 2km2 of the first multi-functional electromagnetic switch 131a; the normally closed temperature control switch 61 is set in the circuit of the normally open switch 2km2 of the first multi-functional electromagnetic switch 131a, and the main circuits of the linkage electromagnetic switch group 16 and the combined three-way electric water valve B 7 are controlled by the normally closed temperature control switch 61.

[0046] The main circuit of normally open electromagnetic switch 4152 is controlled by wireless control device 15.

[0047] The main circuit of the moving iron core 132 of the second multi-functional electromagnetic switch 131b is set on the control circuit of the normally open electromagnetic switch four 152.

[0048] The input lines of normally open switch 1km1 and normally open switch 3km3 of the second multi-functional electromagnetic switch 131b are connected in parallel to the negative terminal of the power supply; the input lines of normally open switch 4km4 and normally open switch 6km6 of the second multi-functional electromagnetic switch 131b are connected in parallel to the positive terminal of the power supply.

[0049] The output lines of normally open switch 1 km1 and normally open switch 6 km6 of the second multi-functional electromagnetic switch 131b are connected; the output lines of normally open switch 3 km3 and normally open switch 4 km4 of the second multi-functional electromagnetic switch 131b are connected.

[0050] One power line of the electric water valve 48 is connected to the connection line between the normally open switch 1km1 and normally open switch 6km6 of the second multi-functional electromagnetic switch 131b; the other power line of the electric water valve 48 is connected to the connection line between the normally open switch 3km3 and normally open switch 4km4 of the second multi-functional electromagnetic switch 131b.

[0051] When the normally open electromagnetic switch 4152 is activated once, the electric water valve 48 will open; when the normally open electromagnetic switch 4152 is activated again, the electric water valve 48 will close.

[0052] The linked electromagnetic switch group 16 includes a normally open switch 7 161, a normally open switch 8 162, a normally closed switch 2 163, a normally closed switch 3 164, a normally closed switch 4 165, a normally closed switch 5 166, and a normally closed switch 6 167.

[0053] The water pump 81 is configured with two sets of main wiring. The live wire of the first set of main wiring is equipped with a normally open switch 7161, and the neutral wire is equipped with a normally open switch 8162.

[0054] The live wire of the second main wiring of water pump 81 is equipped with wire connector 4 811, normally closed switch 2 163, wire connector 6 8011, normally closed switch 8 181, electromagnetic switching switch 4f1, and normally open electromagnetic switch 6 19 and normally closed switch 12 191 in sequence; the neutral wire of the second main wiring is equipped with wire connector 5 812, normally closed switch 3 164, wire connector 7 8012, and normally closed switch 9 182 in sequence.

[0055] The live wire of the first set of main wiring of the water pump 81 is connected to wire connector four 811, and the neutral wire is connected to wire connector five 812.

[0056] A temperature control switch 44 is installed on the main circuit of the electromagnetic switching switch 4f, which normally closes the circuit to the left of the switching switch 4f1. When the temperature control switch 44 is closed, the electromagnetic switching switch 4f disconnects the circuit to the left of the switching switch 4f1 and connects the circuit to the right of the switching switch 4f1.

[0057] The live wire of the main wiring of the normally closed electric water valve 801 is connected to wire connector six 8011, and the neutral wire is connected to wire connector seven 8012.

[0058] The live wire of the main wiring of the normally open electric water valve 21 is equipped with a normally closed thermal switch 31, wire connector 1 211, normally closed switch 4 165, normally open switch 9 183, electromagnetic switch 4f1, and normally open switch 12 191 of normally open electromagnetic switch 6 19; the neutral wire of the main wiring of the normally open electric water valve 21 is equipped with a wire connector 2 212, normally closed switch 5 166, and normally open switch 10 184.

[0059] The wire connector 4 811 is connected to the wire connector 1 211, and a diode 17 is provided on the connection line between the wire connector 4 811 and the wire connector 1 211.

[0060] The wire connector 812 and the wire connector 212 are connected.

[0061] The live wire of the main wiring of normally open electromagnetic switch 51821 is equipped with electromagnetic switch 4f1 and normally open electromagnetic switch 619 normally open switch 12191, and the neutral wire is equipped with normally open switch 11185.

[0062] The main circuit of normally open electromagnetic switch 32 is set on the control circuit of normally open electromagnetic switch 1821; a crossover wire 32a is provided between the live wire and the neutral wire of the main wiring of normally open electromagnetic switch 32, and an energy storage capacitor 32b is arranged on the crossover wire 32a.

[0063] The interlocking switch group 18 includes normally closed switch 7 18a, normally closed switch 8 181, normally closed switch 9 182, normally open switch 9 183, normally open switch 10 184, and normally open switch 11 185.

[0064] The normally open electromagnetic switch 619 mainly controls the second main wiring of the water pump 81, the main wiring of the normally open electric water valve 21, the main wiring of the normally open electromagnetic switch 51821, and the main wiring of the moving iron core 132 of the fourth multi-functional electromagnetic switch 131d.

[0065] The main circuit of the electrical control device 30 of the heat exchanger 3 is equipped with a water flow switch 43 and a normally open electromagnetic switch 32, and a normally open switch A 321 is connected in parallel. When the water flow switch 43 or the normally open switch A 321 is closed, the heat exchanger 3 starts immediately.

[0066] The main circuit of the moving iron core 132 of the third multi-functional electromagnetic switch 131c is equipped with a water flow switch 43 and a normally open electromagnetic switch 32, and the main circuit of the moving iron core 132 of the third multi-functional electromagnetic switch 131c is equipped with a normally closed switch 167 and a normally closed electromagnetic switch 491.

[0067] The input lines of normally open switch 1km1 and normally open switch 3km3 of the third multi-functional electromagnetic switch 131c are connected in parallel to the negative terminal of the power supply; the input lines of normally open switch 4km4 and normally open switch 6km6 of the third multi-functional electromagnetic switch 131c are connected in parallel to the positive terminal of the power supply.

[0068] The output lines of normally open switch 1km1 and normally open switch 3km3 of the third multi-functional electromagnetic switch 131c are connected, and the output lines of normally open switch 4km4 and normally open switch 6km6 of the third multi-functional electromagnetic switch 131c are connected.

[0069] The neutral wire of the main wiring of the normally open electromagnetic switch 619 is connected to the connection line between the normally open switch 1km1 and normally open switch 3km3 of the third multi-functional electromagnetic switch 131c; the live wire of the main wiring of the normally open electromagnetic switch 619 is connected to the connection line between the normally open switch 4km4 and normally open switch 6km6 of the third multi-functional electromagnetic switch 131c.

[0070] A crossover wire 3 19a is provided between the live wire and the neutral wire of the main wiring of the normally open electromagnetic switch 6 19, and an energy storage capacitor 3 19b is arranged on the crossover wire 3 19a.

[0071] The live wire of the main wiring of the moving iron core 132 of the fourth multi-functional electromagnetic switch 131d is provided with wire connector 3 49a, electromagnetic switch 4f switch 4f1 and normally open electromagnetic switch 6 19 normally open switch 12 191 in sequence; the neutral wire of the main wiring of the moving iron core 132 of the fourth multi-functional electromagnetic switch 131d is provided with normally closed switch 7 18a.

[0072] The live wire of the main wiring of the normally closed electromagnetic switch 49 is connected to the wire connector 49a of the live wire of the main wiring of the moving iron core 132 of the fourth multi-functional electromagnetic switch 131d.

[0073] The input lines of normally open switch 1km1 and normally open switch 3km3 of the fourth multi-functional electromagnetic switch 131d are connected in parallel to the negative terminal of the power supply; the input lines of normally open switch 4km4 and normally open switch 6km6 of the fourth multi-functional electromagnetic switch 131d are connected in parallel to the positive terminal of the power supply.

[0074] The output lines of normally open switch 1km1 and normally open switch 3km3 of the fourth multifunctional electromagnetic switch 131d are connected, and the output lines of normally open switch 4km4 and normally open switch 6km6 of the fourth multifunctional electromagnetic switch 131d are connected.

[0075] The neutral wire of the main wiring of normally open electromagnetic switch 24g is connected to the connection line of normally open switch 1km1 and normally open switch 3km3 of the fourth multi-functional electromagnetic switch 131d; the live wire of the main wiring of normally open electromagnetic switch 24g is connected to the connection line of normally open switch 4km4 and normally open switch 6km6 of the fourth multi-functional electromagnetic switch 131d.

[0076] A crossover wire 4g1 is provided between the live wire and the neutral wire of the main wiring of the normally open electromagnetic switch 4g, and an energy storage capacitor 4g2 is arranged on the crossover wire 4g1.

[0077] The main circuit of the combined three-way electric water valve A4c is set on the control circuit of the normally open electromagnetic switch B4g.

[0078] The beneficial effects of the zero-cold-water water heater system provided by this invention are as follows:

[0079] The advantages of this invention are that the zero cold water water heater system is interconnected and mutually restrictive during operation, and works in an orderly manner. This invention has a simple structure, powerful functions, and is easy to implement. With simple modifications, an independent zero cold water water heater system can be produced, which can be installed in places where there is no pre-laid return water pipe, bringing great convenience to users.

[0080] This invention can completely solve the technical problem that the portion of cold water flowing into the hot water pipe from the gas water heater cannot be heated every time it is turned on; this technology can also solve related technical problems of other types of water heaters. Attached Figure Description

[0081] Figure 1 This is a schematic diagram of the structural layout and water flow direction of a zero-cold-water water heater system.

[0082] Figure 2 This is a schematic diagram showing the direction of water flow when starting the first return water pipe unit of a zero-cold-water water heater system.

[0083] Figure 3 This is a schematic diagram showing the direction of water flow when starting the second return water pipe unit of a zero-cold-water water heater system.

[0084] Figure 4 This is a schematic diagram showing the water flow direction when the normally open electric water valve 21 is used independently in a zero-cold-water water heater system.

[0085] Figure 5 This is a schematic diagram showing the direction of water flow when the water tank is activated in a zero-cold-water water heater system.

[0086] Figure 6 This is a schematic diagram illustrating the structure and working principle of a multi-functional electromagnetic switch for a zero-cold-water water heater system.

[0087] Figure 7 This is a schematic diagram of the structure and principle of the control circuit of a zero-cold-water water heater system.

[0088] Figure 8 yes Figure 7 Enlarged view of point E.

[0089] In the diagram: A. Cold water inlet connector, B. Return water inlet connector, C. Hot water outlet connector, D. Pre-installed return water pipe, E. Figure 7At point E, 1. Shell, 2. Cold water pipe, 21. Normally open electric water valve, 211. Wire connector one, 212. Wire connector two, 22. One-way water valve one, 23. Three-way water valve one, 3. Heat exchanger, 30. Electrical control device, 31. Normally closed thermal switch, 32. Normally open electromagnetic switch one, 321. Normally open switch A, 32a. Connection wire one, 32b. Capacitor one, 4. Hot water pipe, 4a. Diverting three-way electric water valve A, 4a1. Inlet of diverting three-way electric water valve A, 4a2. First outlet of diverting three-way electric water valve A, 4a3. Second outlet of diverting three-way electric water valve A, 4b. Heat exchange box, 4b1. Inlet of heat exchange box, 4b2. Flat water pipe, 4b21. Inlet of flat water pipe, 4 b22, Outlet of flat water pipe; 4b3, Fixing bracket for flat water pipe; 4b4, Outlet of heat exchange box; 4c, Combined tee electric water valve A; 4c1, First inlet of combined tee electric water valve A; 4c2, Second inlet of combined tee electric water valve A; 4c3, Outlet of combined tee electric water valve A; 4d, Tee water valve II; 4e, First branch of hot water pipe; 4f, Electromagnetic switching switch; 4f1, Switching switch; 4g, Normally open electromagnetic switch II; 4g1, Crossover wire II; 4g2, Capacitor II; 40, Diverted tee electric water valve B; 401, Inlet of diverted tee electric water valve B; 402, First outlet of diverted tee electric water valve B; 403, Second outlet of diverted tee electric water valve B; 41. The second branch of the hot water pipe, 411, water mixing tank, 412, spherical container, 413, diversion pipe, 42, three-way water valve three, 43, water flow switch, 44, temperature control switch, 45, three-way water valve four, 46, one-way water valve two, 47, three-way water valve five, 48, electric water valve, 49, normally closed solenoid switch, 49a, wire connector three, 491, normally closed switch one, 5, connecting pipe, 6, return water pipe, 61, normally closed temperature control switch, 7, combined three-way electric water valve B, 71, outlet of combined three-way electric water valve B, 72, first inlet of combined three-way electric water valve B, 73, second inlet of combined three-way electric water valve B, 8, combined water pipe, 81, water pump, 811, wire connector four, 812, wire connector five, 82, three-way valve 83. Water valve 6; 80. One-way water valve 3; 81. Branch of combined water pipe; 801. Normally closed electric water valve; 8011. Wire connector 6; 8012. Wire connector 7; 9. Three-way water valve 7; 10. One-way water valve 4; 11. Faucet; 111. Water appliance; 12. Water flow direction; 130. Base; 1301. Support frame; 1302. Support column; 1303. Through hole; 1304. Mounting plate; 131a. First multi-functional electromagnetic switch; 131b. Second multi-functional electromagnetic switch; 131c. Third multi-functional electromagnetic switch; 131d. Fourth multi-functional electromagnetic switch; 132. Moving iron core; 133. Compression spring; 134. Rack and pinion; 1341. Toothed edge; 1342. Stationary iron core; 135. Pawl flywheel.1351. Through hole of ratchet wheel; 135a. Rotatable direction of ratchet wheel of ratchet flywheel; 136. Stepped shaft; 1361. Mounting section of ratchet flywheel; 1362. Mounting section of gear ratchet flywheel; 1363. Mounting section of magnet disk; 1364. Mounting section of bearing; 137. Gear ratchet flywheel; 1371. Pawl; 1372. Gear disk; 1373. Tooth edge of gear disk; 1374. Razor wheel of gear ratchet flywheel; 138. Magnet disk; 1 381. Bar permanent magnet A; 1382. Bar permanent magnet B; 1383. Rotation direction of the magnet disk; 138a. Symbol indicating the magnet head of the bar permanent magnet is facing the switch; 138b. Symbol indicating the magnet head of the bar permanent magnet has rotated past switch symbol A; 138c. Symbol indicating the magnet head of the bar permanent magnet has rotated past switch symbol B; km1. Normally open switch one; km2. Normally open switch two; km3. Normally open switch three; km4. Normally open switch four; km5. Normally open... Switch 5, km6, Normally Open Switch 6, 139, Bearing, 140, Fixing Bracket, 1401, Mounting Bracket for Normally Open Switch, 1402, Mounting Plate for Bearing, 15, Wireless Control Device, 151, Normally Open Solenoid Switch 3, 1511, Manual Button A, 152, Normally Open Solenoid Switch 4, 1521, Manual Button B, 16, Linked Solenoid Switch Group, 161, Normally Open Switch 7, 162, Normally Open Switch 8, 163, Normally Closed Switch 2, 164, Normally Closed Switch 3 165. Normally closed switch four; 166. Normally closed switch five; 167. Normally closed switch six; 17. Diode; 18. Interlocking switch group; 18a. Normally closed switch seven; 181. Normally closed switch eight; 182. Normally closed switch nine; 183. Normally open switch nine; 184. Normally open switch ten; 185. Normally open switch eleven; 1821. Normally open electromagnetic switch five; 19. Normally open electromagnetic switch six; 191. Normally open switch twelve; 19a. Crossover wire three; 19b. Capacitor three. Specific Implementation

[0090] The accompanying drawings are provided for the purpose of making the system more intuitive and easier to understand the structure and principle of the zero-cold-water water heater system; they do not represent its perfection or the final form of each component.

[0091] The cold water water heater system in this case is an interconnected and mutually restrictive device during operation. By referring to the structural and schematic diagram of the cold water water heater system shown in this case, and by understanding step by step, it is easy to deduce the functions of each component of the cold water water heater system, how each component works together, and the inevitable results of their work. Therefore, this article will not describe in detail the subsequent work caused by the operation of each component affecting all other related components. In order to make this article concise and clear, it can be easily seen in this case that some components have two opposite configuration schemes, and the effects of these two opposite configuration schemes are the same. This article only chooses to describe one of them, and is not limited to this. The technical solution of the other configuration is also covered within the scope of protection of the claims.

[0092] Figures 1 to 7 As shown, a zero-cold-water water heater system mainly includes: a water heater shell 1, a cold water pipe unit, a heat exchanger unit, a hot water pipe unit, a first return water pipe unit, a second return water pipe unit, a combined pipe unit, a multi-functional electromagnetic switch, a wireless control device 15, and a control circuit configuration scheme, etc.

[0093] Figures 1 to 5 As shown, the cold water pipe unit is characterized in that: the cold water pipe 2 is arranged in sequence with a cold water inlet connector A, a normally open electric water valve 21, a one-way water valve 22 and a three-way water valve 23, and the outlet of the cold water pipe 2 is connected to the inlet pipe of the heat exchanger 3.

[0094] The normally open electric water valve 21 can either cut off the water flow or allow a small flow of water to pass through after it is closed.

[0095] The three-way water valve 23 is simultaneously connected to the outlet of the combined water pipe 8.

[0096] The normally open electric water valve 21 has a small through hole (not shown) that allows a small flow of water to pass through.

[0097] Figures 1 to 5 As shown, the heat exchanger unit is characterized in that: a normally closed thermal switch 31 is provided next to the ignition point of the heat exchanger 3; the normally closed thermal switch 31 is characterized in that: when the ignition point is ignited, the normally closed thermal switch 31 automatically opens; when the ignition point is extinguished, the normally closed thermal switch 31 automatically closes.

[0098] Depending on the situation, a normally closed pressure switch (not shown) or a normally closed photosensitive switch (not shown) may be installed inside the heat exchanger 3 to replace the normally closed thermal switch 31.

[0099] Figures 1 to 5As shown, the hot water pipe unit is characterized in that: starting from the position where the hot water pipe 4 connects to the outlet pipe of the heat exchanger 3, the following components are arranged in sequence: a diversion three-way electric water valve A 4a, a heat exchange box 4b, a confluence three-way electric water valve A 4c, a three-way water valve II 4d, a diversion three-way electric water valve B 40, a three-way water valve III 42, a flow switch 43, a temperature control switch 44, a three-way water valve IV 45, a one-way water valve II 46, a three-way water valve V 47, an electric water valve 48, and a connector C for the hot water outlet; the hot water pipe 4 is provided with a first branch 4e and a second branch 41.

[0100] The diversion three-way electric water valve A4a is a three-way water valve with switchable water outlet channels; the diversion three-way electric water valve A4a can be replaced by a three-way water valve with manual outlet switching.

[0101] The inlet 4a1 of the diversion three-way electric water valve A is connected to the hot water pipe 4 at its upper end, and the first outlet 4a2 of the diversion three-way electric water valve A is connected to the hot water pipe 4 at its lower end.

[0102] One end of the first branch 4e of the hot water pipe is connected to the second outlet 4a3 of the diversion three-way electric water valve A, and the other end is connected to the three-way water valve 4d.

[0103] The heat exchange box 4b is characterized in that: several flat water pipes 4b2 are arranged inside the heat exchange box 4b, one end of all flat water pipes 4b2 is connected to the inlet 4b21 of the flat water pipe, and the other end of all flat water pipes 4b2 is connected to the outlet 4b22 of the flat water pipe; the water flow channel inside the heat exchange box 4b is divided into a gap space between the inside of the flat water pipes 4b2 and the outside of the flat water pipes 4b2; the inlet 4b21 of the flat water pipe is located inside the heat exchange box 4b, and the inlet 4b21 of the flat water pipe is directly opposite the inlet 4b1 of the heat exchange box; the outlet 4b22 of the flat water pipe extends to the outside of the heat exchange box 4b.

[0104] The gap space outside the flat water pipe 4b2 is equivalent to a series of independent flat water pipes 4b2.

[0105] The gap space inside or outside all the flat water pipes 4b2 inside the heat exchange box 4b is at least enough to accommodate the cold water flowing out after the heat exchanger 3 is started.

[0106] The heat exchange box 4b is preferably configured as a cuboid.

[0107] The inlet 4b1 of the heat exchange box is connected to the hot water pipe 4 at its upper end; the outlet 4b4 of the heat exchange box is connected to the first inlet 4c1 of the combined three-way electric water valve A; the outlet 4b22 of the flat water pipe is connected to the second inlet 4c2 of the combined three-way electric water valve A.

[0108] The outlet 4c3 of the combined three-way electric water valve A is connected to the hot water pipe 4 at its lower end.

[0109] The combined three-way electric water valve A4c is a three-way electric water valve with switchable water inlet channels. The combined three-way electric water valve A4c is normally open at the first inlet 4c1 or the second inlet 4c2 of the combined three-way electric water valve A.

[0110] The diversion three-way electric water valve B40 is a three-way water valve with switchable water outlet channels; the diversion three-way electric water valve B40 can be replaced with a three-way water valve with manual outlet switching.

[0111] The inlet 401 of the diversion three-way electric water valve B is connected to the hot water pipe 4 at its upper end, and the first outlet 402 of the diversion three-way electric water valve B is connected to the hot water pipe 4 at its lower end.

[0112] The second branch 41 of the hot water pipe is provided with a water mixing tank 411; the inlet of the water mixing tank 411 is connected to the second outlet 403 of the diversion three-way electric water valve B, and the outlet of the water mixing tank 411 is connected to the three-way water valve 3 42.

[0113] The water mixing tank 411 is characterized in that: a spherical container 412 is preferably provided inside the water mixing tank 411, and the spherical container 412 is provided with diverting pipes 413 of different lengths distributed in all directions; the water flowing in from the inlet of the water mixing tank 411 directly enters the spherical container 412 and then flows into the water mixing tank 411 through the diverting pipes 413, and then flows into the three-way water valve 42 through the outlet of the water mixing tank 411.

[0114] The function of the spherical container 412 is to mix hot and cold water.

[0115] The interior of the water mixing tank 411 is directly arranged as a rotating wheel (not shown) or is hollow; the rotating wheel can be electrically driven; the rotating wheel serves to mix hot and cold water.

[0116] The function of the water mixing tank 411 is to gently process the cold and hot water flowing into it; the size of the water mixing tank 411 is designed according to the actual situation.

[0117] The water mixing tank 411 is preferably configured as a cuboid or a sphere.

[0118] The temperature control switch 44 is characterized in that: when the temperature inside the hot water pipe 4 drops to a predetermined value, the temperature control switch 44 automatically disconnects; when the temperature inside the hot water pipe 4 rises to a predetermined value, the temperature control switch 44 automatically closes.

[0119] Combination Figures 1 to 5 and Figure 7As shown, the combined three-way electric water valve B7 is a three-way electric water valve with switchable water inlet channels. The first inlet 72 of the combined three-way electric water valve B7 is normally open.

[0120] Figures 1 to 5 As shown, in the first return water pipe unit, one end of the connecting pipe 5 of the first return water pipe unit is connected to the three-way water valve 45, and the other end is connected to the first inlet 72 of the confluence three-way electric water valve B.

[0121] Figures 1 to 7 As shown, the second return water pipe unit is characterized in that: the pre-arranged return water pipe D is connected to the return water inlet of the return water pipe 6 via the connector B, and the outlet of the return water pipe 6 is connected to the second inlet 73 of the combined three-way electric water valve B; a normally closed temperature control switch 61 is provided on the return water pipe 6 or the pre-arranged return water pipe D.

[0122] The normally closed temperature control switch 61 automatically opens when heated to a preset temperature value, and automatically closes when it senses that the temperature is lower than the preset temperature value.

[0123] Figures 1 to 5 As shown, a confluence pipe unit is characterized in that: the inlet of the confluence pipe 8 is connected to the outlet 71 of the confluence three-way electric water valve B 7, and the outlet of the confluence pipe 8 is connected to the three-way water valve 23; the confluence pipe 8 is arranged sequentially from the outlet 71 of the confluence three-way electric water valve B, with a water pump 81, a three-way water valve 6 82, and a one-way water valve 3 83; the confluence pipe 8 is provided with a branch 80; the inlet of the branch 80 is connected to the three-way water valve 6 82, and the outlet is connected to the three-way water valve 5 47; a normally closed electric water valve 801 is provided on the branch 80 of the confluence pipe.

[0124] Combination Figure 1 and Figure 2 As shown, the function of the branch 80 of the combined water pipe is: when the zero cold water water heater system starts the first return water pipe unit, and the faucet 11 is in the open hot water pipe outlet position, a small drop of water will flow out of the water heater 111, so as to remind the user to turn off the faucet 11 after leaving, so as to avoid the loss of water, electricity and gas bills due to not turning off the faucet 11.

[0125] Figure 6 and Figure 7 As shown, the multifunctional electromagnetic switch mainly consists of a rack unit, a stepped shaft unit, a switch unit, and a mounting bracket unit.

[0126] Figure 6As shown, the rack unit mainly consists of a moving iron core 132, a compression spring 133, and a rack 134 arranged from left to right; the left section of the rack 134 has a toothed edge 1341, and the right end is provided with a stationary iron core 1342; the toothed edge 1341 meshes with the toothed edge 1373 of the gear disk of the gear pawl flywheel 137.

[0127] The stepped shaft unit is characterized in that: the stepped shaft 136 is arranged from bottom to top with the main components ratchet flywheel 135, gear ratchet flywheel 137, magnet disk 138 and bearing 139; the gear disk of the gear ratchet flywheel 137 has teeth 1373 that mesh with the teeth 1341 of the rack 134.

[0128] The ratchet flywheel 135 is mounted on the mounting plate 1304 of the base 130 of the fixed frame 140, and the bearing 139 is mounted on the bearing mounting plate 1402 of the fixed frame 140; the magnet plate 138 is provided with a bar permanent magnet A 1381 or a bar permanent magnet B 1382.

[0129] The switching unit mainly consists of normally open or normally closed switches arranged opposite to the magnet disk 138; the normally open or normally closed switches are mounted on the mounting bracket 1401 of the normally open switch.

[0130] A preferred arrangement of normally open or normally closed switches around the magnet disk 138, taking the example of setting bar permanent magnet A 1381 and bar permanent magnet B 1382 on the magnet disk 138:

[0131] No switch was initially installed at the point where bar permanent magnet A 1381 and bar permanent magnet B 1382 were directly opposite each other;

[0132] When the magnet disk 138 rotates once, a normally open switch 2km2 is set directly opposite the bar permanent magnet A 1381, and a normally open switch 5km5 is set directly opposite the bar permanent magnet B 1382. At the same time as the magnet disk 138 rotates, the bar permanent magnet A 1381 rotates past the normally open switch 1km1 set on the mounting bracket 1401 of the normally open switch, and the bar permanent magnet B 1382 rotates past the normally open switch 4km4 set on the mounting bracket 1401 of the normally open switch.

[0133] When the magnet disk 138 rotates once more, the bar permanent magnet A 1381 rotates to the initial position of the bar permanent magnet B 1382, and the bar permanent magnet B 1382 rotates to the initial position of the bar permanent magnet A 1381. At the same time as the magnet disk 138 rotates, the bar permanent magnet A 1381 rotates past the normally open switch 3km3 set on the mounting bracket 1401 of the normally open switch, and the bar permanent magnet B 1382 rotates past the normally open switch 6km6 set on the mounting bracket 1401 of the normally open switch.

[0134] Figure 6 and Figure 7 As shown, the multifunctional electromagnetic switch is characterized in that: because the ratchet flywheel 135 has a ratchet system, the stepped shaft 136 installed on the ratchet flywheel 135 can only rotate counterclockwise; because the gear ratchet flywheel 137 has a ratchet system, when the rack 134 moves to the right, it simultaneously drives the gear disk 1372 to rotate counterclockwise, causing the stepped shaft 136 and the magnetic disk 138 to rotate counterclockwise; when the rack 134 moves to the left, the gear disk 1372 rotates clockwise, and because the stepped shaft 136 is restricted by the anti-reverse rotation of the ratchet flywheel 135, the stepped shaft 136 and the magnetic disk 138 remain stationary at this time.

[0135] When the moving iron core 132 is energized once, the bar permanent magnet A 1381 rotates to the position directly opposite the normally open switch 2km2, turning on the normally open switch 2km2. During this process, normally open switch 1km1 is turned on, and then normally open switch 1km1 is turned off. This causes the bar permanent magnet B 1382 to rotate to the position directly opposite the normally open switch 5km5, turning on the normally open switch 5km5. During this process, normally open switch 4km4 is turned on, and then normally open switch 4km4 is turned off.

[0136] When the moving iron core 132 is energized again, the bar permanent magnet A 1381 rotates to the initial position of the bar permanent magnet B 1382, disconnecting the normally open switch 2km2. During this process, the normally open switch 3km3 is connected, and then disconnected. The bar permanent magnet B 1382 rotates to the initial position of the bar permanent magnet A 1381, disconnecting the normally open switch 5km5. During this process, the normally open switch 6km6 is connected, and then disconnected.

[0137] Combining the above and Figures 6 to 8 As shown, the bar permanent magnet A 1381 or bar permanent magnet B 1382 can be modified into a pressing contact, and the normally open switch 1km1, normally open switch 2km2, normally open switch 3km3, normally open switch 4km4, normally open switch 5km5 and normally open switch 6km6 can be modified into normally open spring switches; its function is to use the modified pressing contact to press and connect the modified normally open spring switch.

[0138] Figure 7 As shown, the wireless control device 15 is a control device for controlling a zero-cold-water water heater system using a wireless terminal device or a network terminal device.

[0139] Figures 6 to 8 The control circuit configuration scheme is shown below; the preferred configuration scheme of the control circuit is as follows.

[0140] The main circuit of normally open electromagnetic switch 3151 is controlled by wireless control device 15;

[0141] The main circuit of the moving iron core 132 of the first multi-functional electromagnetic switch 131a is set on the control circuit of the normally open electromagnetic switch 151.

[0142] The main circuit of the linkage electromagnetic switch group 16 is set in the circuit of the normally open switch 2km2 of the first multi-functional electromagnetic switch 131a; the main circuit of the combined three-way electric water valve B 7 is set in the circuit of the normally open switch 2km2 of the first multi-functional electromagnetic switch 131a; the normally closed temperature control switch 61 is set in the circuit of the normally open switch 2km2 of the first multi-functional electromagnetic switch 131a, and the main circuits of the linkage electromagnetic switch group 16 and the combined three-way electric water valve B 7 are controlled by the normally closed temperature control switch 61.

[0143] The main circuit of normally open electromagnetic switch 4152 is controlled by wireless control device 15.

[0144] The main circuit of the moving iron core 132 of the second multi-functional electromagnetic switch 131b is set on the control circuit of the normally open electromagnetic switch four 152.

[0145] The input lines of normally open switch 1km1 and normally open switch 3km3 of the second multi-functional electromagnetic switch 131b are connected in parallel to the negative terminal of the power supply; the input lines of normally open switch 4km4 and normally open switch 6km6 of the second multi-functional electromagnetic switch 131b are connected in parallel to the positive terminal of the power supply.

[0146] The output lines of normally open switch 1 km1 and normally open switch 6 km6 of the second multi-functional electromagnetic switch 131b are connected; the output lines of normally open switch 3 km3 and normally open switch 4 km4 of the second multi-functional electromagnetic switch 131b are connected.

[0147] One power line of the electric water valve 48 is connected to the connection line between the normally open switch 1km1 and normally open switch 6km6 of the second multi-functional electromagnetic switch 131b; the other power line of the electric water valve 48 is connected to the connection line between the normally open switch 3km3 and normally open switch 4km4 of the second multi-functional electromagnetic switch 131b.

[0148] When the normally open electromagnetic switch 4152 is activated once, the electric water valve 48 will open; when the normally open electromagnetic switch 4152 is activated again, the electric water valve 48 will close.

[0149] The main function of the electric water valve 48 is that if a user forgets to turn off the tap 11 after leaving home, the user can directly use the network terminal device to control the wireless control device 15 to turn off the electric water valve 48, thereby shutting off the hot water pipe and reducing the loss of water, electricity and gas bills.

[0150] The linked electromagnetic switch group 16 includes a normally open switch 7 161, a normally open switch 8 162, a normally closed switch 2 163, a normally closed switch 3 164, a normally closed switch 4 165, a normally closed switch 5 166, and a normally closed switch 6 167.

[0151] The water pump 81 is configured with two sets of main wiring. The live wire of the first set of main wiring is equipped with a normally open switch 7161, and the neutral wire is equipped with a normally open switch 8162.

[0152] The live wire of the second main wiring of water pump 81 is equipped with wire connector 4 811, normally closed switch 2 163, wire connector 6 8011, normally closed switch 8 181, electromagnetic switching switch 4f1, and normally open electromagnetic switch 6 19 and normally closed switch 12 191 in sequence; the neutral wire of the second main wiring is equipped with wire connector 5 812, normally closed switch 3 164, wire connector 7 8012, and normally closed switch 9 182 in sequence.

[0153] The live wire of the first set of main wiring of the water pump 81 is connected to wire connector four 811, and the neutral wire is connected to wire connector five 812.

[0154] A temperature control switch 44 is installed on the main circuit of the electromagnetic switching switch 4f, which normally closes the circuit to the left of the switching switch 4f1. When the temperature control switch 44 is closed, the electromagnetic switching switch 4f disconnects the circuit to the left of the switching switch 4f1 and connects the circuit to the right of the switching switch 4f1.

[0155] The live wire of the main wiring of the normally closed electric water valve 801 is connected to wire connector six 8011, and the neutral wire is connected to wire connector seven 8012.

[0156] The live wire of the main wiring of the normally open electric water valve 21 is equipped with a normally closed thermal switch 31, wire connector 1 211, normally closed switch 4 165, normally open switch 9 183, electromagnetic switch 4f1, and normally open switch 12 191 of normally open electromagnetic switch 6 19; the neutral wire of the main wiring of the normally open electric water valve 21 is equipped with a wire connector 2 212, normally closed switch 5 166, and normally open switch 10 184.

[0157] The wire connector 4 811 is connected to the wire connector 1 211, and a diode 17 is provided on the connection line between the wire connector 4 811 and the wire connector 1 211.

[0158] The wire connector 812 and the wire connector 212 are connected.

[0159] The live wire of the main wiring of normally open electromagnetic switch 51821 is equipped with electromagnetic switch 4f1 and normally open electromagnetic switch 619 normally open switch 12191, and the neutral wire is equipped with normally open switch 11185.

[0160] The main circuit of normally open electromagnetic switch 32 is set on the control circuit of normally open electromagnetic switch 1821; a crossover wire 32a is provided between the live wire and the neutral wire of the main wiring of normally open electromagnetic switch 32, and an energy storage capacitor 32b is arranged on the crossover wire 32a.

[0161] When the main wiring of normally open electromagnetic switch 32 is disconnected, the electrical energy stored in capacitor 32b is sufficient to keep the normally open electromagnetic switch 32 closed until the water flow switch 43 is closed before disconnecting.

[0162] The interlocking switch group 18 includes normally closed switch 7 18a, normally closed switch 8 181, normally closed switch 9 182, normally open switch 9 183, normally open switch 10 184, and normally open switch 11 185.

[0163] The normally open electromagnetic switch 619 mainly controls the second main wiring of the water pump 81, the main wiring of the normally open electric water valve 21, the main wiring of the normally open electromagnetic switch 51821, and the main wiring of the moving iron core 132 of the fourth multi-functional electromagnetic switch 131d.

[0164] The main circuit of the electrical control device 30 of the heat exchanger 3 is equipped with a water flow switch 43 and a normally open electromagnetic switch 32, and a normally open switch A 321 is connected in parallel. When the water flow switch 43 or the normally open switch A 321 is closed, the heat exchanger 3 starts immediately.

[0165] The main circuit of the moving iron core 132 of the third multi-functional electromagnetic switch 131c is equipped with a water flow switch 43 and a normally open electromagnetic switch 32, and the main circuit of the moving iron core 132 of the third multi-functional electromagnetic switch 131c is equipped with a normally closed switch 167 and a normally closed electromagnetic switch 491.

[0166] The input lines of normally open switch 1km1 and normally open switch 3km3 of the third multi-functional electromagnetic switch 131c are connected in parallel to the negative terminal of the power supply; the input lines of normally open switch 4km4 and normally open switch 6km6 of the third multi-functional electromagnetic switch 131c are connected in parallel to the positive terminal of the power supply.

[0167] The output lines of normally open switch 1km1 and normally open switch 3km3 of the third multi-functional electromagnetic switch 131c are connected, and the output lines of normally open switch 4km4 and normally open switch 6km6 of the third multi-functional electromagnetic switch 131c are connected.

[0168] The neutral wire of the main wiring of the normally open electromagnetic switch 619 is connected to the connection line between the normally open switch 1km1 and normally open switch 3km3 of the third multi-functional electromagnetic switch 131c; the live wire of the main wiring of the normally open electromagnetic switch 619 is connected to the connection line between the normally open switch 4km4 and normally open switch 6km6 of the third multi-functional electromagnetic switch 131c.

[0169] A crossover wire 3 19a is provided between the live wire and the neutral wire of the main wiring of the normally open electromagnetic switch 6 19, and an energy storage capacitor 3 19b is arranged on the crossover wire 3 19a.

[0170] When the main wiring of normally open electromagnetic switch 619 is disconnected, the electrical energy stored in capacitor 319b is sufficient to keep the normally open electromagnetic switch 619 closed until the main circuit of electromagnetic switching switch 4f is closed before disconnecting.

[0171] The live wire of the main wiring of the moving iron core 132 of the fourth multi-functional electromagnetic switch 131d is provided with wire connector 3 49a, electromagnetic switch 4f switch 4f1 and normally open electromagnetic switch 6 19 normally open switch 12 191 in sequence; the neutral wire of the main wiring of the moving iron core 132 of the fourth multi-functional electromagnetic switch 131d is provided with normally closed switch 7 18a.

[0172] The live wire of the main wiring of the normally closed electromagnetic switch 49 is connected to the wire connector 49a of the live wire of the main wiring of the moving iron core 132 of the fourth multi-functional electromagnetic switch 131d.

[0173] The input lines of normally open switch 1km1 and normally open switch 3km3 of the fourth multi-functional electromagnetic switch 131d are connected in parallel to the negative terminal of the power supply; the input lines of normally open switch 4km4 and normally open switch 6km6 of the fourth multi-functional electromagnetic switch 131d are connected in parallel to the positive terminal of the power supply.

[0174] The output lines of normally open switch 1km1 and normally open switch 3km3 of the fourth multifunctional electromagnetic switch 131d are connected, and the output lines of normally open switch 4km4 and normally open switch 6km6 of the fourth multifunctional electromagnetic switch 131d are connected.

[0175] The neutral wire of the main wiring of normally open electromagnetic switch 24g is connected to the connection line of normally open switch 1km1 and normally open switch 3km3 of the fourth multi-functional electromagnetic switch 131d; the live wire of the main wiring of normally open electromagnetic switch 24g is connected to the connection line of normally open switch 4km4 and normally open switch 6km6 of the fourth multi-functional electromagnetic switch 131d.

[0176] A crossover wire 4g1 is provided between the live wire and the neutral wire of the main wiring of the normally open electromagnetic switch 4g, and an energy storage capacitor 4g2 is arranged on the crossover wire 4g1.

[0177] When the main wiring of the normally open electromagnetic switch 4g is disconnected, the electrical energy stored in the capacitor 4g2 is sufficient to sustain the time required for the cold water flowing out of the heat exchanger 3 to completely flow into the flat water pipe 4b2 each time it is started.

[0178] The main circuit of the combined three-way electric water valve A4c is set on the control circuit of the normally open electromagnetic switch B4g.

[0179] Combining the above and Figure 2 , Figures 6 to 8 As shown, the zero-cold-water water heater system is in the on state. The normally closed switches 18a, 181, and 182 of the linkage switch group 18 are in the closed state. When the faucet 11 is turned on, the water flow switch 43 is closed, which causes the main circuit of the moving iron core 132 of the third multi-functional electromagnetic switch 131c to be closed, which causes the normally open switch 191 of the normally open electromagnetic switch 19 to be closed, which causes the normally open electric water valve 21 to be closed, which causes the water pump 81 to start running, and causes the normally closed electric water valve 801 to be opened. When the temperature control switch 44 automatically closes due to heat, it causes the main circuit of the electromagnetic switching switch 4f to be connected, which in turn causes the main circuit of the moving iron core 132 of the fourth multi-functional electromagnetic switch 131d to be connected, which causes the normally open electric water valve 21 to open, which causes the water pump 81 to stop running, which causes the main circuit of the normally closed electromagnetic switch 49 to be connected, which causes the main circuit of the moving iron core 132 of the third multi-functional electromagnetic switch 131c to be disconnected, which causes the main circuit of the combined three-way electric water valve A 4c to be connected, which causes the combined three-way electric water valve A 4c to switch the water inlet channel.

[0180] Combining the above and Figure 3 , Figures 6 to 7 As shown, the zero-cold-water water heater system is characterized in that: when the zero-cold-water water heater system is in the powered-on state, starting the normally open electromagnetic switch 3151 once from a wireless terminal device or a network terminal device, or manually starting the normally open electromagnetic switch 3151 once, causes the second inlet 73 of the confluence three-way electric water valve B 7 to open, causing the normally open switch 7161 and normally open switch 8162 of the linkage electromagnetic switch group 16 to close, causing the normally closed switch 2163, normally closed switch 3164, normally closed switch 4165, normally closed switch 5166 and normally closed switch of the linkage electromagnetic switch group 16 to close. When switch 6167 is disconnected, water pump 81 starts running, causing normally open electric water valve 21 to close. When normally closed temperature control switch 61 is automatically disconnected due to heat, the second inlet 73 of the combined three-way electric water valve 7 closes, causing normally open switch 7161 and normally open switch 8162 of the linkage electromagnetic switch group 16 to open, causing normally closed switch 2163, normally closed switch 3164, normally closed switch 4165, normally closed switch 5166 and normally closed switch 6167 of the linkage electromagnetic switch group 16 to close, causing water pump 81 to stop running, and normally open electric water valve 21 to open.

[0181] Combining the above and Figure 4 , Figures 6 to 7 As shown, the zero-cold-water water heater system is characterized in that: when the zero-cold-water water heater system is in the on state, the normally open switches 9 183, 10 184 and 11 185 of the linkage switch group 18 are in the closed state. When the faucet 11 is turned on, the water flow switch 43 is closed, which causes the main circuit of the moving iron core 132 of the third multi-functional electromagnetic switch 131c to be closed, which causes the normally open switch 12 191 of the normally open electromagnetic switch 6 19 to be closed, which causes the normally open electromagnetic switch 5 1821 to be connected to the main circuit of the normally open electromagnetic switch 1 32, which causes the normally open switch 321 of the normally open electromagnetic switch 1 32 to be closed, which causes the normally open electric water valve 21 to be closed; when the normally closed thermal switch 31 is turned off, the normally open electric water valve 21 is immediately opened.

[0182] Gas water heaters, including instant water heaters, will have some cold water flowing directly into the hot water pipe without being heated in the heat exchanger every time the tap is turned on. Figures 4 to 7 As shown, each time the faucet 11 is turned on, the normally open electric water valve 21 cuts off the water flow in the cold water pipe 2 or allows a small flow of water through the cold water pipe 2. At this time, no cold water flows into the hot water pipe 4 or only a small amount of cold water flows in. When the heat exchanger 3 can heat the water flow, the normally open electric water valve 21 opens the cold water pipe 2, allowing a large amount of cold water from the cold water pipe 2 to flow into the heat exchanger 3. The heat exchanger 3 heats the water immediately and then it flows into the hot water pipe 4. The small amount of cold or hot water generated in this process can be gently treated in the water mixing tank 411.

[0183] To meet various needs, the technical solution of the second branch 41 of the hot water pipe and the water mixing tank 411 of the zero cold water water heater system can be implemented at any position on the water pipe of the water heater system.

[0184] Depending on the addition or subtraction of components in the zero-cold-water water heater system, the amount of electrical energy that capacitor 1 (32b), capacitor 3 (19b), and capacitor 2 (4g2) need to store will be designed according to the actual situation.

[0185] from Figures 1 to 5 It is not difficult to see that, with simple settings, the diversion three-way electric water valve A 4a and the three-way water valve B 4d can be replaced with each other, and the diversion three-way electric water valve B 40 and the three-way water valve C 42 can be replaced with each other.

[0186] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various substitutions, additions, and changes can be made without departing from the principle of the present invention. All such substitutions, additions, and changes fall within the protection scope of the present invention.

Claims

1. A zero cold water hot water heater system comprising: The cold water pipe unit, heat exchanger unit, hot water pipe unit, multifunctional electromagnetic switch, wireless control device (15) and the cold water pipe unit, heat exchanger unit, hot water pipe unit, multifunctional electromagnetic switch, wireless control device (15) of the zero cold water heater system and the control circuit of the zero cold water heater system are characterized in that: The cold water pipe (2) of the cold water pipe unit is provided with a normally open electric water valve (21), and the water outlet of the cold water pipe (2) is communicated with the water inlet pipe of the heat exchanger (3); the normally open electric water valve (21) is closed to cut off the water flow or allow a small amount of water to pass through; The heat exchanger (3) of the heat exchanger unit is provided with a normally closed heat-sensitive switch (31) beside the ignition point; and the heat exchanger (3) is provided with a normally closed pressure switch or a normally closed light-sensitive switch to replace the normally closed heat-sensitive switch (31); The normally closed heat-sensitive switch (31) is automatically opened when the ignition point is ignited, and is automatically closed when the ignition point is extinguished; The hot water pipe (4) of the hot water pipe unit is communicated with the water outlet pipe of the heat exchanger (3), and is provided with a heat exchange box (4b), a converging tee electric water valve A (4c), a diverging tee electric water valve B (40), a tee water valve C (42), a water flow switch (43) and an electric water valve (48) at the position; the hot water pipe (4) is provided with a second branch (41) of the hot water pipe; the heat exchange box (4b) is internally provided with a plurality of flat water pipes (4b2), one end of all the flat water pipes (4b2) is connected to the water inlet (4b21) of the flat water pipe, and the other end of all the flat water pipes (4b2) is connected to the water outlet (4b22) of the flat water pipe; the water flow passage in the heat exchange box (4b) is divided into the inside of the flat water pipe (4b2) and the gap space outside the flat water pipe (4b2); the water inlet (4b21) of the flat water pipe is arranged in the inside of the heat exchange box (4b), and the water inlet (4b21) of the flat water pipe is opposite to the water inlet (4b1) of the heat exchange box; the water outlet (4b22) of the flat water pipe penetrates to the outside of the heat exchange box (4b); the water inlet (4b1) of the heat exchange box is communicated with the upper end of the hot water pipe (4); the water outlet (4b4) of the heat exchange box is communicated with the first inlet (4c1) of the converging tee electric water valve A; the water outlet (4b22) of the flat water pipe is communicated with the second inlet (4c2) of the converging tee electric water valve A; the converging tee electric water valve A (4c) is a tee electric water valve capable of switching the water inlet passage, and the first inlet (4c1) of the converging tee electric water valve A or the second inlet (4c2) of the converging tee electric water valve A is normally open; the outlet (4c3) of the converging tee electric water valve A is communicated with the lower end of the hot water pipe (4). The shunt three-way electric water valve B (40) is a three-way water valve capable of switching the water outlet channel; the inlet (401) of the shunt three-way electric water valve B is communicated with the hot water pipe (4) at the upper end, and the first outlet (402) of the shunt three-way electric water valve B is communicated with the hot water pipe (4) at the lower end; the second branch (41) of the hot water pipe is provided with a water mixing tank (411); the water inlet of the water mixing tank (411) is communicated with the second outlet (403) of the shunt three-way electric water valve B, and the water outlet of the water mixing tank (411) is communicated to the three-way water valve three (42); a spherical container (412) is arranged in the water mixing tank (411); the spherical container (412) is provided with a plurality of shunt pipes (413) of different lengths distributed around; the water flow from the water inlet of the water mixing tank (411) directly enters the spherical container (412) and then flows into the water mixing tank (411) through the shunt pipes (413), and then flows into the three-way water valve three (42) through the water outlet of the water mixing tank (411); The multifunctional electromagnetic switch is mainly composed of a rack unit, a stepped shaft unit, a switch unit and a fixing frame unit. The rack unit is mainly composed of a moving iron core (132), a compression spring (133) and a rack (134) arranged from left to right; the left section of the rack (134) is provided with a tooth opening (1341), and the right end is provided with a static iron core (1342); the tooth opening (1341) is in mesh with the tooth opening (1373) of the gear disc of the gear ratchet flywheel (137); The stepped shaft unit is sequentially provided from bottom to top with a main component ratchet flywheel (135), a gear ratchet flywheel (137), a magnet disc (138) and a bearing (139) on the stepped shaft (136); the tooth opening (1373) of the gear disc of the gear ratchet flywheel (137) is in mesh with the tooth opening (1341) of the rack (134); the ratchet flywheel (135) is installed on the mounting disc (1304) of the base (130) of the fixing frame (140), and the bearing (139) is installed on the bearing mounting disc (1402) of the fixing frame (140); the magnet disc (138) is provided with a strip-shaped permanent magnet A (1381) or a strip-shaped permanent magnet B (1382). The switch unit is mainly composed of a dynamic closing or breaking switch arranged around the magnet disc (138); the dynamic closing or breaking switch is arranged on the mounting frame (1401) of the dynamic closing switch; the dynamic closing or breaking switch is arranged around the magnet disc (138), for example, the strip-shaped permanent magnet A (1381) and the strip-shaped permanent magnet B (1382) arranged on the magnet disc (138); the strip-shaped permanent magnet A (1381) and the strip-shaped permanent magnet B (1382) are not arranged at the initial position of the closing switch; after the magnet disc (138) rotates once, the strip-shaped permanent magnet A (1381) is arranged at the position of the dynamic closing switch two (km2), the strip-shaped permanent magnet B (1382) is arranged at the position of the dynamic closing switch five (km5), the strip-shaped permanent magnet A (1381) rotates through the dynamic closing switch one (km1) arranged on the mounting frame (1401) of the dynamic closing switch, the strip-shaped permanent magnet B (1382) rotates through the dynamic closing switch four (km4) arranged on the mounting frame (1401) of the dynamic closing switch; after the magnet disc (138) rotates again, the strip-shaped permanent magnet A (1381) rotates to the initial position of the strip-shaped permanent magnet B (1382), the strip-shaped permanent magnet B (1382) rotates to the initial position of the strip-shaped permanent magnet A (1381), the strip-shaped permanent magnet A (1381) rotates through the dynamic closing switch three (km3) arranged on the mounting frame (1401) of the dynamic closing switch, the strip-shaped permanent magnet B (1382) rotates through the dynamic closing switch six (km6) arranged on the mounting frame (1401) of the dynamic closing switch; The multifunctional electromagnetic switch: the ratchet flywheel (135) has a ratchet system, the stepped shaft (136) installed in the ratchet flywheel (135) can only rotate counterclockwise; the gear ratchet flywheel (137) has a ratchet system, when the rack (134) moves to the right, the gear disc (1372) is driven to rotate counterclockwise, causing the stepped shaft (136) and the magnet disc (138) to rotate counterclockwise; when the rack (134) moves to the left, the gear disc (1372) rotates clockwise, and the stepped shaft (136) is limited by the anti-reverse ratchet flywheel (135), so that the stepped shaft (136) and the magnet disc (138) remain stationary; when the moving iron core (132) is powered once, the bar-shaped permanent magnet A (1381) rotates to the opposite position of the movable contact switch two (km2), the movable contact switch two (km2) is turned on, in the process, the movable contact switch one (km1) is turned on, and then the movable contact switch one (km1) is turned off; the bar-shaped permanent magnet B (1382) rotates to the opposite position of the movable contact switch five (km5), the movable contact switch five (km5) is turned on, in the process, the movable contact switch four (km4) is turned on, and then the movable contact switch four (km4) is turned off; when the moving iron core (132) is powered again, the bar-shaped permanent magnet A (1381) rotates to the initial position of the bar-shaped permanent magnet B (1382), the movable contact switch two (km2) is turned off, in the process, the movable contact switch three (km3) is turned on, and then the movable contact switch three (km3) is turned off; the bar-shaped permanent magnet B (1382) rotates to the initial position of the bar-shaped permanent magnet A (1381), the movable contact switch five (km5) is turned off, in the process, the movable contact switch six (km6) is turned on, and then the movable contact switch six (km6) is turned off; The wireless control device (15) is a wireless terminal device or a network terminal device control zero cold water heater system control device.

2. The zero cold water heater system according to claim 1, wherein: The main circuit of the normally open electromagnetic switch four (152) is controlled by the wireless control device (15); The main circuit of the moving iron core (132) of the second multifunctional electromagnetic switch (131b) is arranged on the control circuit of the normally open electromagnetic switch four (152); The input lines of the movable contact switch one (km1) and the movable contact switch three (km3) of the second multifunctional electromagnetic switch (131b) are connected in parallel to the negative pole of the power supply; the input lines of the movable contact switch four (km4) and the movable contact switch six (km6) of the second multifunctional electromagnetic switch (131b) are connected in parallel to the positive pole of the power supply; The output lines of the movable contact switch one (km1) and the movable contact switch six (km6) of the second multifunctional electromagnetic switch (131b) are connected; the output lines of the movable contact switch three (km3) and the movable contact switch four (km4) of the second multifunctional electromagnetic switch (131b) are connected. One power line of the electric water valve (48) is connected to the joint line between the dynamic-on switch one (km1) and the dynamic-on switch six (km6) of the second multifunctional electromagnetic switch (131b); the other power line of the electric water valve (48) is connected to the joint line between the dynamic-on switch three (km3) and the dynamic-on switch four (km4) of the second multifunctional electromagnetic switch (131b); The electric water valve (48) is opened when the normally-open electromagnetic switch four (152) is activated once, and the electric water valve (48) is closed when the normally-open electromagnetic switch four (152) is activated once again; The linkage electromagnetic switch group (16) has a dynamic-on switch seven (161), a dynamic-on switch eight (162), a dynamic-off switch two (163), a dynamic-off switch three (164), a dynamic-off switch four (165), a dynamic-off switch five (166), and a dynamic-off switch six (167); The water pump (81) is provided with two groups of main lines; The hot line of the second group of main lines of the water pump (81) is sequentially provided with a wire connector four (811), the dynamic-off switch two (163), a wire connector six (8011), the dynamic-off switch eight (181), the switching switch (4f1) of the electromagnetic switching switch (4f), and the dynamic-on switch twelve (191) of the normally-open electromagnetic switch six (19); the zero line of the second group of main lines is sequentially provided with a wire connector five (812), the dynamic-off switch three (164), a wire connector seven (8012), and the dynamic-off switch nine (182); The main circuit of the electromagnetic switching switch (4f) is provided with a temperature control switch (44), and the left line of the normally-closed switching switch (4f1) of the electromagnetic switching switch (4f); when the temperature control switch (44) is closed, the electromagnetic switching switch (4f) disconnects the left line of the switching switch (4f1) and connects the right line of the switching switch (4f1); The hot line of the main line of the normally-closed electric water valve (801) is connected to the wire connector six (8011), and the zero line is connected to the wire connector seven (8012); The hot line of the main line of the normally-open electric water valve (21) is sequentially provided with a normally-closed thermal switch (31), a wire connector one (211), the dynamic-off switch four (165), the dynamic-on switch nine (183), the switching switch (4f1) of the electromagnetic switching switch (4f), and the dynamic-on switch twelve (191) of the normally-open electromagnetic switch six (19); the zero line of the main line of the normally-open electric water valve (21) is sequentially provided with a wire connector two (212), the dynamic-off switch five (166), and the dynamic-on switch ten (184); The wire connector four (811) and the wire connector one (211) are connected, and a diode (17) is arranged on the wire connecting the wire connector four (811) and the wire connector one (211); The wire connector five (812) and the wire connector two (212) are connected; The hot line of the main line of the normally-open electromagnetic switch five (1821) is sequentially provided with the switching switch (4f1) of the electromagnetic switching switch (4f) and the dynamic-on switch twelve (191) of the normally-open electromagnetic switch six (19), and the zero line is provided with the dynamic-on switch eleven (185). The main circuit of the normally open electromagnetic switch one (32) is arranged on the control circuit of the normally open electromagnetic switch five (1821); an exchange line one (32a) is arranged between the live wire and the zero line of the main line of the normally open electromagnetic switch one (32), and an energy storage capacitor one (32b) is arranged on the exchange line one (32a); The linkage switch group (18) has the dynamic break switch seven (18a), the dynamic break switch eight (181), the dynamic break switch nine (182), the dynamic make switch nine (183), the dynamic make switch ten (184) and the dynamic make switch eleven (185); The normally open electromagnetic switch six (19) mainly controls the second group of main lines of the water pump (81), the main lines of the normally open electric water valve (21), the main lines of the normally open electromagnetic switch five (1821) and the main lines of the dynamic iron core (132) of the fourth multifunctional electromagnetic switch (131d); The main circuit of the electric control device (30) of the heat exchanger (3) is connected in parallel with the water flow switch (43) and the dynamic make switch A (321) of the normally open electromagnetic switch one (32); when the water flow switch (43) or the dynamic make switch A (321) is closed, the heat exchanger (3) is started immediately; The main circuit of the dynamic iron core (132) of the third multifunctional electromagnetic switch (131c) is connected in parallel with the water flow switch (43) and the dynamic make switch A (321) of the normally open electromagnetic switch one (32), and the main circuit of the dynamic iron core (132) of the third multifunctional electromagnetic switch (131c) is provided with the dynamic break switch six (167) and the dynamic break switch one (491) of the normally closed electromagnetic switch (49); The input lines of the dynamic make switch one (km1) and the dynamic make switch three (km3) of the third multifunctional electromagnetic switch (131c) are connected in parallel to the negative pole of the power supply; the input lines of the dynamic make switch four (km4) and the dynamic make switch six (km6) of the third multifunctional electromagnetic switch (131c) are connected in parallel to the positive pole of the power supply; The output lines of the dynamic make switch one (km1) and the dynamic make switch three (km3) of the third multifunctional electromagnetic switch (131c) are connected, and the output lines of the dynamic make switch four (km4) and the dynamic make switch six (km6) of the third multifunctional electromagnetic switch (131c) are connected; The zero line of the main line of the normally open electromagnetic switch six (19) is connected to the connection line of the dynamic make switch one (km1) and the dynamic make switch three (km3) of the third multifunctional electromagnetic switch (131c); the live wire of the main line of the normally open electromagnetic switch six (19) is connected to the connection line of the dynamic make switch four (km4) and the dynamic make switch six (km6) of the third multifunctional electromagnetic switch (131c); An exchange line three (19a) is arranged between the live wire and the zero line of the main line of the normally open electromagnetic switch six (19), and an energy storage capacitor three (19b) is arranged on the exchange line three (19a); The main line of the moving iron core (132) of the fourth multifunctional electromagnetic switch (131d) is provided with an electric wire joint three (49a), a switching switch (4f1) of an electromagnetic switching switch (4f), and a normally open electromagnetic switch six (191) in sequence. The main line of the normally closed electromagnetic switch (49) is connected to the electric wire joint three (49a) of the main line of the moving iron core (132) of the fourth multifunctional electromagnetic switch (131d). The input lines of the normally open electromagnetic switch six (km6) and the normally open electromagnetic switch four (km4) of the fourth multifunctional electromagnetic switch (131d) are connected in parallel to the negative pole of the power supply. The output lines of the normally open electromagnetic switch six (km6) and the normally open electromagnetic switch four (km4) of the fourth multifunctional electromagnetic switch (131d) are connected in series. The main line of the normally open electromagnetic switch two (4g) is connected to the series line of the normally open electromagnetic switch six (km6) and the normally open electromagnetic switch four (km4) of the fourth multifunctional electromagnetic switch (131d). The main line of the normally open electromagnetic switch two (4g) is provided with an exchange line two (4g1) between the fire wire and the zero line, and the exchange line two (4g1) is provided with an energy storage capacitor two (4g2). The main circuit of the combined three-way electric water valve A (4c) is arranged on the control circuit of the normally open electromagnetic switch two (4g).

3. The cold water zero heating water heater system according to claim 2, wherein: When the zero-cold water heater system is in the starting state, the moving break switch seven (18a), the moving break switch eight (181), and the moving break switch nine (182) of the linkage switch group (18) are in the closed state, the faucet (11) is opened, the water flow switch (43) is closed, the main circuit of the moving iron core (132) of the third multifunctional electromagnetic switch (131c) is closed, the normally open electromagnetic switch six (191) is closed, and the normally open electric water valve (21) is closed. When the temperature control switch (44) is heated and automatically closed, the main circuit of the electromagnetic switching switch (4f) is connected, the main circuit of the moving iron core (132) of the fourth multifunctional electromagnetic switch (131d) is connected, the normally open electric water valve (21) is opened, the main circuit of the normally closed electromagnetic switch (49) is connected, the main circuit of the moving iron core (132) of the third multifunctional electromagnetic switch (131c) is disconnected, the main circuit of the combined three-way electric water valve A (4c) is connected, and the combined three-way electric water valve A (4c) is switched into the water channel.

4. The cold water zero heating water heater system according to claim 2, wherein: When the zero-cold-water water heater system is in the starting state, the on-off switch nine (183), the on-off switch ten (184) and the on-off switch eleven (185) of the linkage switch group (18) are in the closed state, the faucet (11) is opened, the water flow switch (43) is closed, the main circuit of the moving iron core (132) of the third multifunctional electromagnetic switch (131c) is closed, the on-off switch twelve (191) of the normally open electromagnetic switch six (19) is closed, the normally open electromagnetic switch five (1821) is connected with the main circuit of the normally open electromagnetic switch one (32), the on-off switch A (321) of the normally open electromagnetic switch one (32) is closed, and the normally open electric water valve (21) is closed; when the normally closed heat-sensitive switch (31) is opened, the normally open electric water valve (21) is immediately opened.

5. The cold water-free water heater system according to claim 1, characterized in that: Each time the faucet (11) is opened, the normally open electric water valve (21) cuts off the water flow of the cold water pipe (2) or allows a small amount of water flow to pass through the cold water pipe (2), at which time the hot water pipe (4) has no cold water flow or only a small amount of cold water flow; when the heat exchanger (3) can heat the water flow, the normally open electric water valve (21) opens the cold water pipe (2) to allow a large amount of cold water to flow into the heat exchanger (3), and the heat exchanger (3) heats immediately and flows into the hot water pipe (4).

6. The cold water zero heating water heater system according to claim 1, wherein: The technical scheme of the second branch (41) of the hot water pipe and the water mixing tank (411) of the zero-cold-water water heater system can be implemented at any position of the water pipe of the water heater system.

7. The cold water-free water heater system according to claim 1, wherein: The bar-shaped permanent magnet A (1381) or the bar-shaped permanent magnet B (1382) can be modified into a squeeze contact, and the on-off switch one (km1), the on-off switch two (km2), the on-off switch three (km3), the on-off switch four (km4), the on-off switch five (km5) and the on-off switch six (km6) can be modified into a normally open spring switch.

8. The cold water-free water heater system according to claim 1, wherein: The shape of the heat exchange tank (4b) is set as a cuboid; the shape of the water mixing tank (411) is set as a cuboid or a sphere.

9. The cold water-free water heater system according to claim 1, wherein: The inside of the water mixing tank (411) is directly arranged as a runner or set as a hollow; the runner can be set as an electric drive.

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