Pressurized water pump and pressurized water supply system based on solar water heater

Abstract

The present invention relates to a booster pump, which includes a pump body having a water inlet channel and a water outlet channel, and is characterized in that: it further includes a mixing valve and a flow switch. The first water inlet end of the mixing valve is connected to the water outlet channel, the second water inlet end of the mixing valve is used for connecting with an external water circuit, the mixed water outlet end of the mixing valve is connected to the water inlet end of the flow switch, the water outlet end of the flow switch is used for connecting with an external water circuit, and the signal output module of the flow switch is electrically connected to the control module of the pump body to control whether the pump body continues to work or not. This booster pump can ensure its effective operation whether in winter or summer. The present invention also relates to a booster water supply system suitable for a bathroom and having this booster pump based on a solar water heater.

Description

Technical Field

[0001] The present invention relates to a booster pump, and the present invention also relates to a booster water supply system suitable for a bathroom and having the booster pump based on a solar water heater. Background Art

[0002] Solar water heaters have the advantages of energy conservation and environmental protection and are widely used. Existing waterway systems based on solar hot water include a solar water heater, water pipes, a booster pump, a temperature-adjusting faucet, a shower head, and a toilet. The solar water heater has a cold water inlet pipeline and a hot water outlet pipeline. The hot water outlet pipeline is connected to the hot water inlet end of the temperature-adjusting faucet through a booster pump. The setting of the booster pump can increase the water pressure and the water output. If there is no booster pump and only the potential energy provides the water pressure, it will lead to insufficient water pressure and small water output. To ensure the effective operation of the booster pump, there is generally a pressure switch and a flow switch. In addition, there is also a cold water pipeline, and the cold water pipeline is connected to the cold water inlet end of the temperature-adjusting faucet. Various water-using devices such as a toilet may be connected to the cold water pipeline.

[0003] Solar water heaters have such a characteristic during use: in winter, due to less sunlight, the water temperature is generally about 38 degrees. When taking a bath, the water heater is basically turned to the full-hot water position. Because the hot water flow rate is large, it can ensure that the flow switch is always in the triggered state and the booster pump can work normally. In summer, due to sufficient sunlight, the water temperature can reach more than 90 degrees. When taking a bath, the temperature-adjusting switch is basically adjusted to a position where the cold water flow rate is much larger than the hot water flow rate. Because the hot water flow rate is too small to always trigger the water flow switch in the booster pump, the booster pump does not work, and the water flowing out of the shower head is all cold water, and the water temperature is too low and not suitable for taking a bath. If the temperature-adjusting faucet is slightly adjusted towards the hot water direction, the water flowing out of the shower head will be too hot, making the use very embarrassing. Currently, major solar water heater manufacturers cannot solve this problem well. Summary of the Invention

[0004] The first technical problem to be solved by the present invention is to provide a booster pump that can ensure the effective operation of the booster pump in both winter and summer in view of the above-mentioned prior art status. This booster pump is particularly suitable for a booster water supply system based on a solar water heater in a bathroom.

[0005] The technical solution adopted by the present invention to solve the above first technical problem is as follows: A booster pump, including a pump body having an inlet channel and an outlet channel, and a pressure switch is provided inside the pump body. It is characterized in that: it further includes a mixing valve and a flow switch. The first inlet end of the mixing valve is connected to the outlet channel of the pump body. The second inlet end of the mixing valve is used to connect to an external water circuit. The mixed water outflow end of the mixing valve is connected to the inlet end of the flow switch. The outlet end of the flow switch is used to connect to an external water circuit. The signal output module of the flow switch is electrically connected to the control module of the pump body to control whether the pump body continues to work. When the flow switch detects the water flow signal at the mixed water outflow end of the mixing valve, the signal output module of the flow switch outputs a signal and is received by the control module of the pump body, and the control module of the pump body controls the pump body to continue to work.

[0006] Compared with the prior art, the advantages of this booster pump are as follows: A mixing valve is provided at the outlet end of the pump body, and the flow switch is arranged at the mixed water outflow end of the mixing valve. When this booster pump is used in a booster water supply system based on a solar water heater in a bathroom, the mixing valve provided on the pump body can be adjusted to a position with a relatively high water temperature (such as 60 °C). Even if the water temperature in the solar water heater is 90 °C, when the 60 °C hot water is used in combination with a temperature-adjusting faucet connected to a shower head, and the temperature-adjusting faucet is adjusted to a position comfortable for the human body (35 °C), it can ensure that enough hot water flow passes through the hot water inlet end of the temperature-adjusting faucet. In this way, it can also ensure that enough water volume passes through the mixed water outflow end of the mixing valve through the flow switch. The flow switch can be fully triggered, and the signal output module of the flow switch stably outputs a signal and is received by the control module of the pump body, ensuring that the pump body continues to work.

[0007] Preferably, the signal output module of the flow switch is directly connected to the control module of the pump body through a wire. Since the signal output module of the flow switch and the control module of the pump body are relatively close, it is suitable to be directly connected by a wire, and the direct connection by wire is beneficial to signal transmission. Of course, a wireless reception mode can also be adopted.

[0008] Preferably, the pump body, the mixing valve and the flow switch are integrated in a housing. In this way, the integrity of the booster pump is better.

[0009] Further improvement: The above-mentioned flow switch includes a housing with an axial channel. The water inlet end of the housing is connected to the mixed water outlet end of the mixing valve, and the water outlet end of the housing is connected to the hot water inlet end of the temperature-controlled faucet. A piston is arranged in the axial channel and can axially slide to be in a first position or a second position. A spring that keeps the piston in a tendency to stay in the first position is arranged in the axial channel. The piston can axially slide to the second position under the action of water flow. A magnet is arranged on the piston and can slide with the piston. A magnetic induction switch is arranged on the side wall of the housing and is electrically connected to the signal output module. When the piston is in the first position, the magnetic induction switch cannot be induced by the magnet, and the signal output module does not emit a signal. When the piston is in the second position, the magnetic induction switch is induced by the magnet, and the signal output module outputs a signal and is received by the control module. This auxiliary flow switch can be assembled independently as a module. After assembly, only the two ends of the housing need to be respectively connected to the water pipes of the cold water pipeline, which is convenient for assembly. Of course, a battery part for powering the signal output module is also provided on the housing.

[0010] In order to guide the movement track of the piston, an axially extending guide post is arranged at one end of the piston. A guide hole for the guide post to be inserted and guided is arranged in the axial channel. The outer peripheral wall of the guide hole is connected to the inner wall of the axial channel through a plurality of connecting ribs arranged at intervals along the circumference. The spring is supported between the piston and the connecting ribs.

[0011] If the piston deflects during the movement, it may cause the magnetic induction switch not to be induced by the magnet. To prevent the piston from deflecting during the movement and ensure that the magnetic induction switch is induced by the magnet when the piston slides to the second position, guide blocks are formed on the peripheral wall of the piston. Guide grooves for the guide blocks to slide in are axially opened on the inner wall of the axial channel. The guide grooves have a circumferential constraint and rotation-limiting effect on the guide blocks.

[0012] For the convenience of assembly, a limit seat for limiting the sliding of the piston is arranged at one end of the axial channel. The limit seat is connected to the outer end of the housing by means of rotational clamping. A connecting pipe fitting is inserted at the other end of the axial channel. External connecting threads for connecting with water pipes are arranged on the connecting pipe fitting. The external connecting threads facilitate the connection of one end of the auxiliary flow switch part to the water pipe. To facilitate the installation of the magnetic induction switch and the signal output module, a receiving cavity for accommodating the magnetic induction switch and the signal output module is arranged on the outer wall of the housing. The receiving cavity also plays a role in protecting the magnetic induction switch and the signal output module.

[0013] To facilitate the connection of the other end of the flow switch to the mixing valve, a sealing ring and two symmetrically arranged limiting steps located behind the sealing ring are embedded on the outer peripheral wall of the other end of the above-mentioned housing. Concave cavities are provided on both sides of the mixed water outflow end of the mixing valve. The other end of the housing is inserted into the mixed water outflow end of the mixing valve, and the limiting steps are hidden in the concave cavities and constrained in the concave cavities by U-shaped fasteners inserted on the concave cavities. The housing is connected to the mixing valve through insertion and combination with the U-shaped fastener, and at the same time, the setting of the sealing ring prevents water leakage.

[0014] The second technical problem to be solved by the present invention is to provide a pressurized water supply system based on a solar water heater that can ensure the effective operation of the booster pump regardless of winter or summer, and this water supply system is particularly suitable for use in a bathroom, aiming at the above-mentioned current situation of the prior art.

[0015] The technical solution adopted by the present invention to solve the above-mentioned second technical problem is as follows: A pressurized water supply system based on a solar water heater includes a solar water heater, a temperature-adjusting faucet, a shower head, and a cold water inlet pipeline. The solar water heater has a cold water supply pipeline and a hot water outlet pipeline. The shower head is communicated with the mixed water outflow end of the temperature-adjusting faucet, and the cold water inlet pipeline is communicated with the cold water inlet end of the temperature-adjusting faucet. It is characterized in that: it further includes the aforementioned booster pump. The hot water outlet pipeline is communicated with the water inlet channel of the pump body. A branch is separated from the cold water supply pipeline and communicated with the second water inlet end of the mixing valve. The water outlet end of the flow switch is communicated with the hot water inlet end of the temperature-adjusting faucet. When the temperature-adjusting faucet is opened and hot water flows into the hot water inlet end of the temperature-adjusting faucet, the flow switch can detect the water flow signal at the mixed water outflow end of the mixing valve. The signal output module of the flow switch outputs a signal and is received by the control module of the pump body, and the control module of the pump body controls the pump body to continuously operate.

[0016] Preferably, the above-mentioned mixing valve is a constant temperature mixing valve. The constant temperature mixing valve can ensure that the outlet temperature of the hot water flowing to the temperature-adjusting faucet is constant.

[0017] To increase the application of the water circuit system, a branch hot water pipeline is further provided on the hot water outlet pipeline between the water outlet end of the flow switch and the temperature-adjusting faucet. A first water-using device is provided on the branch hot water pipeline, and the cold water inlet pipeline is also connected to the first water-using device. The first water-using device can be a temperature-adjusting faucet for a washbasin. A second water-using device is further provided on the cold water inlet pipeline. The second water-using device is such as a flush toilet.

[0018] Compared with the prior art, the advantages of this water supply system are as follows: A mixing valve is provided at the water outlet end of the water pump body, and a flow switch is arranged at the mixed water outlet end of the mixing valve. Then, the water outlet end of the flow switch is communicated with the hot water inlet end of the temperature-adjusting faucet, ensuring that the booster pump can work effectively and the outlet water temperature is appropriate whether it is used in winter or summer. When used in winter, due to the large hot water flow passing through, the flow switch on the booster pump works normally, ensuring the normal operation of the booster pump. When used in summer, the mixing valve provided on the water pump body can be adjusted to a higher water temperature (such as 60 °C). In this way, even if the water temperature in the solar water heater is 90 °C, when the 60 °C hot water is used in combination with the temperature-adjusting faucet connected to the shower head and the temperature-adjusting faucet is adjusted to a comfortable and stable position for the human body (35 °C), it can also ensure that enough hot water flow passes through the hot water inlet end of the temperature-adjusting faucet. In this way, it can also ensure that enough water volume passes through the mixed water outlet end of the mixing valve through the flow switch, and the flow switch can be fully triggered. The signal output module of the flow switch stably outputs a signal and is received by the control module of the water pump body, ensuring the continuous operation of the water pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the principle of an embodiment of the booster pump of the present invention;

[0020] Figure 2 is a schematic diagram of the principle of an embodiment of the water supply system of the present invention;

[0021] Figure 3 is a three-dimensional structural diagram of the auxiliary flow switch part in the embodiment of the water supply system of the present invention;

[0022] Figure 4 is a three-dimensional assembly diagram of the auxiliary flow switch part in the embodiment of the water supply system of the present invention;

[0023] Figure 5 is a cross-sectional view of the auxiliary flow switch part in the embodiment of the water supply system of the present invention;

[0024] Figure 6 is Figure 5 the A-A cross-sectional view of;

[0025] Figure 7 is a three-dimensional exploded view of the auxiliary flow switch part in the embodiment of the water supply system of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The present invention will be further described in detail below with reference to the embodiments of the drawings.

[0027] As Figure 1 shown, it is a preferred embodiment of the booster pump of the present invention.

[0028] A booster water pump includes a water pump body 1 having a water inlet passage 11 and a water outlet passage 12. A pressure switch for controlling the operation of the water pump body 1 is provided inside the water pump body 1. The above is the prior art of the booster water pump, and relevant patents can be referred to.

[0029] The main improvement of this booster water pump lies in: it further includes a mixing valve 2 and a flow switch 3. The first water inlet end 21 of the mixing valve 2 is connected to the water outlet passage 12 of the water pump body 1. The second water inlet end 22 of the mixing valve 2 is used to connect to an external water circuit. The mixed water outflow end 23 of the mixing valve 2 is connected to the water inlet end 3a of the flow switch 3. The water outlet end 3b of the flow switch 3 is used to connect to an external water circuit. The signal output module 3c of the flow switch 3 is electrically connected to the control module 13 of the water pump body 1 to control whether the water pump body 1 continues to operate. When the flow switch 3 detects the water flow signal at the mixed water outflow end 23 of the mixing valve 2, the signal output module 3c of the flow switch 3 outputs a signal and is received by the control module 13 of the water pump body 1, and the control module 13 of the water pump body 1 controls the water pump body 1 to continue to operate.

[0030] In this embodiment, the signal output module 3c of the flow switch 3 is directly connected to the control module 13 of the water pump body 1 through a wire 4. The water pump body 1, the mixing valve 2, and the flow switch 3 are integrated in a housing.

[0031] As Figures 2 to 7 shown, it is a preferred embodiment of the booster water supply system of the present invention.

[0032] A booster water supply system based on a solar water heater includes a solar water heater 5, a temperature-adjusting faucet 6, a shower head 7, and a cold water inlet pipeline 8. The solar water heater 5 has a cold water supply pipeline 51 and a hot water outlet pipeline 52. A solenoid valve 53 for controlling the water supply to the solar water heater 5 is provided at the cold water supply pipeline 51. The shower head 7 is communicated with the mixed water outflow end 63 of the temperature-adjusting faucet 6. The cold water inlet pipeline 8 is communicated with the cold water inlet end 61 of the temperature-adjusting faucet 6. The mixed water outflow end 63 of the temperature-adjusting faucet 6 can have multiple ones and can be communicated with a ceiling shower or a faucet.

[0033] The main improvement of this water supply system lies in: it further includes the booster pump in the foregoing embodiment. The hot water outlet pipe 52 is communicated with the water inlet passage 11 of the pump body 1. A branch is separated from the cold water supply pipe 51 and is communicated with the second water inlet end 22 of the mixing valve 2. The mixing valve is a constant temperature mixing valve. The water outlet end 3b of the flow switch 3 is then communicated with the hot water inlet end 62 of the temperature control faucet 6. When the temperature control faucet 6 is opened and hot water flows into the hot water inlet end 62 of the temperature control faucet 6, the flow switch 3 can detect the water flow signal at the mixed water outlet end 23 of the mixing valve 2. The signal output module 3c of the flow switch 3 outputs a signal and is received by the control module 13 of the pump body 1, and the control module 13 of the pump body 1 controls the pump body 1 to continuously operate.

[0034] A branch hot water pipe 14 is also provided on the hot water outlet pipe 12 between the water outlet end 3b of the flow switch 3 and the temperature control faucet 3. A first water using device 9a is provided on the branch hot water pipe 14. The cold water inlet pipe 8 is also connected to the first water using device 9a. The first water using device 9a can be a temperature control faucet for a washbasin. A second water using device 9b is also provided on the cold water inlet pipe 8. The second water using device 9b can be a flush toilet.

[0035] As Figures 3 to 7 shown, the auxiliary flow switch 3 in this embodiment includes

[0036] a housing 31 having an axial channel 311. The water inlet end 3a of the housing 31 is connected to the mixed water outlet end 23 of the mixing valve 2, and the water outlet end 3b of the housing 31 is connected to the hot water inlet end 62 of the temperature control faucet 6. A receiving cavity 315 for accommodating the magnetic induction switch 35 and the signal output module 3c is provided on the outer wall of the housing 31.

[0037] a piston 32 disposed in the axial channel 311 and capable of axially sliding to be in a first position or a second position. A spring 33 for keeping the piston 32 in a tendency to be in the first position is provided in the axial channel 311. The piston 32 can axially slide to the second position under the action of water flow. One end of the piston 32 is provided with an axially extending guide post 321. A guide hole 312 for inserting and guiding the guide post 321 is provided in the axial channel 311. The outer peripheral wall of the guide hole 312 is connected to the inner wall of the axial channel 311 through a plurality of connecting ribs 313 arranged at intervals along the circumference. The spring 33 is supported between the piston 32 and the connecting ribs 313. Guide blocks 322 are formed on the peripheral wall of the piston 32, and guide grooves for the guide blocks 322 to slide therein are axially opened on the inner wall of the axial channel 311.

[0038] a magnet 34 disposed on the piston 32 and capable of sliding with the piston 32.

[0039] The magnetic induction switch 35, which can be a reed switch or other Hall element, is provided on the side wall of the housing 31 and electrically connected to the signal output module 3c. When the piston 32 is in the first position state, the magnetic induction switch 35 cannot be induced by the magnet 34, and the signal output module 3c will not emit a signal. When the piston 32 is in the second position state, the magnetic induction switch 35 is induced by the magnet 34, and the signal output module 3c emits a signal and is received by the control module 13.

[0040] A limit seat 36 for limiting the sliding of the piston 32 is provided at one end of the axial channel 311, and the limit seat 36 is connected to the outer end of the housing 31 by means of rotational snap connection.

[0041] A connecting pipe fitting 37 is inserted at the other end of the axial channel 311, and an external connection thread 371 for connecting to a water pipe is provided on the connecting pipe fitting 37.

[0042] A sealing ring 38 is embedded on the outer peripheral wall of the other end of the housing 31, and two symmetrically arranged limit steps 314 are located behind the sealing ring 38. Concave cavities 231 are provided on both sides of the mixed water outflow end 23 of the mixing valve 2. The other end of the housing 31 is inserted into the mixed water outflow end 23 of the mixing valve 2, and the limit steps 314 are hidden in the concave cavities 231 and constrained in the concave cavities 231 by U-shaped fasteners 232 inserted on the concave cavities 231.

[0043] A sealing ring 38 is embedded on the outer peripheral wall of the other end of the housing 31, and two symmetrically arranged limit steps 314 are located behind the sealing ring 38. Concave cavities 51 are provided on both sides of the pipe fitting port end of the cold water inlet pipeline 5. The other end of the housing 31 is inserted into the pipe fitting of the cold water inlet pipeline 5, and the limit steps 314 are hidden in the concave cavities 51 and constrained in the concave cavities 51 by U-shaped fasteners 52 inserted on the concave cavities 51.

[0044] The working principle and process of this pressurized water supply system are as follows:

[0045] A mixing valve 2 is provided at the water outlet channel 12 of the water pump body 1, and the water inlet end 3a of the flow switch 3 is provided at the mixed water outflow end 23 of the mixing valve 2, and the water outlet end 3b of the flow switch 3 is then communicated with the hot water inlet end 62 of the temperature control faucet 6, so that this water circuit system can ensure the effective operation of the booster pump and ensure a suitable outlet water temperature whether used in winter or summer; the operation of the water pump body 1 first needs to ensure that in the initial stage, there is pressure release in the hot water pipeline 52, and the control module 13 of the water pump body 1 is initially triggered, and then the flow switch 3 and the mixing valve 2 can function.

[0046] When used in winter, due to the large flow rate of the hot water passing through, the flow switch 3 on the water pump body 1 works normally, which can ensure the normal operation of the booster water pump. When used in summer, the mixing valve 2 provided on the water pump body 1 can be adjusted to a position with a relatively high water temperature (such as 60 °C). In this way, even if the water temperature in the solar water heater is 90 °C, when the 60 °C hot water is used in cooperation with the temperature-adjusting faucet 6 connected to the shower head 7, and the temperature-adjusting faucet 6 is adjusted to a position where the human body feels comfortable and stable (35 °C), it can also ensure that a sufficient amount of hot water flows through the hot water inlet end 62 of the temperature-adjusting faucet 6. In this way, it can also ensure that a sufficient amount of water flows out through the mixed water outlet end 23 of the mixing valve 2 and passes through the flow switch 3. The flow switch 3 can be fully triggered, and the signal output module 8 of the flow switch 3 stably outputs a signal and is received by the control module 13 of the water pump body 1, ensuring the continuous operation of the water pump body 1.

[0047] It should be noted that in the description of this embodiment, the orientation or positional relationship indicated by terms such as "front, back", "left, right", "up, down", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. The terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A pressurized water supply system based on a solar water heater, comprising a solar water heater (5), a temperature-adjusting faucet (6), a shower head (7), and a cold water inlet pipeline (8). The solar water heater (5) has a cold water supply pipeline (51) and a hot water outlet pipeline (52). The shower head (7) is communicated with the mixed water outlet end of the temperature-adjusting faucet (6), and the cold water inlet pipeline (8) is communicated with the cold water inlet end (61) of the temperature-adjusting faucet (6). It is characterized in that: It further includes a booster pump, The booster pump has a pump body (1) with a water inlet channel (11) and a water outlet channel (12). A pressure switch is provided inside the pump body (1). It also includes a mixing valve (2) and a flow switch (3). The first water inlet end (21) of the mixing valve (2) is connected to the water outlet channel (12) of the pump body (1). The second water inlet end (22) of the mixing valve (2) is used for connecting to an external water circuit. The mixed water outlet end (23) of the mixing valve (2) is connected to the water inlet end (3a) of the flow switch (3). The water outlet end (3b) of the flow switch (3) is used for connecting to an external water circuit. The signal output module (3c) of the flow switch (3) is electrically connected to the control module (13) of the pump body (1) to control whether the pump body (1) continues to work or not; The hot water outlet pipeline (52) is communicated with the water inlet channel (11) of the pump body (1). A branch of the cold water supply pipeline (51) is communicated with the second water inlet end (22) of the mixing valve (2). The water outlet end (3b) of the flow switch (3) is communicated with the hot water inlet end (62) of the temperature-adjusting faucet (6). When the temperature-adjusting faucet (6) is opened, hot water flows into the hot water inlet end (62) of the temperature-adjusting faucet (6). The flow switch (3) can detect the water flow signal at the mixed water outlet end (23) of the mixing valve (2). The signal output module (3c) of the flow switch (3) outputs a signal and is received by the control module (13) of the pump body (1). The control module (13) of the pump body (1) controls the pump body (1) to continue working.

2. The pressurized water supply system based on a solar water heater according to claim 1, It is characterized in that: The signal output module (3c) of the flow switch (3) is directly connected to the control module (13) of the pump body (1) through a wire (4).

3. The pressurized water supply system based on a solar water heater according to claim 1, It is characterized in that: The pump body (1), the mixing valve (2) and the flow switch (3) are integrated in a housing.

4. The pressurized water supply system based on a solar water heater according to claim 1, It is characterized in that: The flow switch (3) includes a housing (31) having an axial channel (311). The water inlet end (3a) of the housing (31) is connected to the mixed water outlet end (23) of the mixing valve (2). The water outlet end (3b) of the housing (31) is connected to the hot water inlet end (62) of the temperature-adjusting faucet (6). A piston (32) is disposed within an axial passage (311) and is axially slidable to be in a first position or a second position. A spring (33) is provided within the axial passage (311) to keep the piston (32) in a tendency to stay in the first position. The piston (32) can axially slide to the second position under the action of water flow; A magnet (34) is disposed on the piston (32) and can slide with the piston (32); A magnetic induction switch (35) is disposed on the side wall of the housing (31) and is electrically connected to the signal output module (3c). When the piston (32) is in the first position state, the magnetic induction switch (35) cannot be induced by the magnet (34), and the signal output module (3c) does not emit a signal. When the piston (32) is in the second position state, the magnetic induction switch (35) is induced by the magnet (34), and the signal output module (3c) emits a signal and is received by the control module (13).

5. The pressurized water supply system based on a solar water heater according to claim 4, wherein: One end of the piston (32) is provided with an axially extending guide post (321). A guide hole (312) for inserting and guiding the guide post (321) is provided within the axial passage (311). The outer peripheral wall of the guide hole (312) is connected to the inner wall of the axial passage (311) through a plurality of connecting ribs (313) spaced along the circumference. The spring (33) is supported between the piston (32) and the connecting ribs (313); Guide blocks (322) are formed on the peripheral wall of the piston (32), and guide grooves for the guide blocks (322) to slide therein are axially formed on the inner wall of the axial passage (311).

6. The pressurized water supply system based on a solar water heater according to claim 4, wherein: One end of the axial passage (311) is provided with a limit seat (36) for limiting the sliding of the piston (32). The limit seat (36) is connected to the outer end of the housing (31) by a rotational snap-fit manner; A connecting pipe fitting (37) is inserted into the other end of the axial passage (311). The connecting pipe fitting (37) is provided with an external connection thread (371) for connecting to a water pipe; A receiving cavity (315) for accommodating the magnetic induction switch (35) and the signal output module (3c) is provided on the outer wall of the housing (31).

7. The pressurized water supply system based on a solar water heater according to claim 6, wherein: A sealing ring (38) and two symmetrically arranged limit steps (314) located behind the sealing ring (38) are embedded on the outer peripheral wall of the other end of the housing (31). Concave cavities (231) are provided on both sides of the mixed water outflow end (23) of the mixing valve (2). The other end of the housing (31) is inserted into the mixed water outflow end (23) of the mixing valve (2), and the limit steps (314) are hidden within the concave cavities (231) and are constrained within the concave cavities (231) by U-shaped fasteners (232) inserted on the concave cavities (231).

8. The pressurized water supply system based on a solar water heater according to claim 1, wherein: The mixing valve (2) is a constant temperature mixing valve.

9. The pressurized water supply system based on a solar water heater according to claim 1, characterized in that: A branch hot water pipeline (14) is further provided on the hot water outlet pipeline (52) between the water outlet end (3b) of the flow switch (3) and the temperature regulating faucet (6). A first water using device (9a) is provided on the branch hot water pipeline (14), and the cold water inlet pipeline (8) is also connected to the first water using device (9a); a second water using device (9b) is further provided on the cold water inlet pipeline (8).

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