Water vending machine

Abstract

The invention discloses a water vending machine, which relates to the technical field of water vending machines, and comprises: a soft water purification system, which at least comprises a pp filter element, an activated carbon filter element and an RO filter element; the hydrogen-rich system comprises a low-TDS pure water tank and a PEM electrolyzer, and a resin filter element is communicated with a pipeline fixedly communicated between a water outlet of the low-TDS pure water tank and an inlet and an outlet of the PEM electrolyzer in series; wherein a water inlet of the low-TDS pure water tank is communicated with a water outlet of the RO filter element in parallel; an oxygen outlet of the PEM electrolyzer is fixedly communicated with an inlet of the low-TDS pure water tank; the device further comprises a hydrogen mixing jet device. The water inlet end of the PEM electrolyzer is connected with the resin filter element in series, residual ions and organic impurities after softening are deeply adsorbed, pollutants are prevented from making contact with electrodes from the source, long-term efficient operation of the electrolytic bath is guaranteed, then pure hydrogen generated through electrolysis is conveyed to the hydrogen mixing jet device through an independent pipeline and efficiently fused with soft water obtained after multi-stage purification, and the risk of secondary pollution is completely eradicated.

Description

TECHNICAL FIELD

[0001] The present application relates to water vending machine technology, in particular to a water vending machine. BACKGROUND

[0002] The automatic water vending machine is a device that sets up in the community, integrates the functions of centralized automatic water production and automatic water vending, and provides international standard drinking water for community residents through the use of filtration and purification technology. Its design purpose is to provide international standard drinking water for community residents through the use of filtration and purification technology. It is a mechanical system that purifies water to achieve direct drinking standards. It is a kind of water that achieves the water quality standard of direct drinking by filtering, permeating, mineralizing, oxygenating, sterilizing and other eight layers of purification. The filtration system specifically includes the following prior art:

[0003] Chinese authorized patent, publication number CN209242836U, publication date 2019-08-13, discloses a self-service water vending machine.

[0004] Chinese authorized patent, publication number CN215954403U, publication date 2022-03-04, discloses an automatic water vending machine.

[0005] The deficiency of the prior art is that the existing automatic water vending machine increases the hydrogen content in the water quality softening and purification process, and the water rich in hydrogen can activate human cells, delay aging, and can have a conditioning effect on some diseases, and can improve the immune performance of the human body. The main problem is the lack of effective pre-treatment links. The existing process is often to directly soften and purify the raw water, and then electrolyze the hydrogen-rich water. This processing sequence ignores the fact that some impurities (such as fine particulate matter, organic matter or ions) may still remain after the softening and purification of the raw water. The electrodes of the electrolytic cell are easily adsorbed and enriched with these residual impurities due to their inherent adsorption properties when working. Long-term operation, the continuous accumulation of impurities on the electrode surface can cause serious electrode pollution (fouling or poisoning). Thus reducing the hydrogen production efficiency, affecting the quality and concentration of hydrogen-rich water. Secondly, pollution accelerates electrode wear, shortening the service life of the electrolytic cell and even the entire machine. SUMMARY

[0006] The purpose of the present application is to provide a water vending machine to solve the above-mentioned deficiencies in the prior art.

[0007] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: a water vending machine, comprising:

[0008] A soft water purification system, which at least includes a pp filter core, an activated carbon filter core and an RO filter core;

[0009] A hydrogen-rich system comprising a low-TDS pure water tank and a PEM electrolyzer, a pipeline fixedly communicated between a water outlet of the low-TDS pure water tank and a water inlet of the PEM electrolyzer, an electrolytic water pump and a resin filter element connected in series on the pipeline;

[0010] The water inlet of the low-TDS pure water tank is connected in series with the water outlet of the RO filter element.

[0011] The oxygen outlet of the PEM electrolyzer is fixedly communicated with the water inlet of the low-TDS pure water tank.

[0012] The hydrogen-rich system further comprises a hydrogen mixing jet device, the hydrogen outlet of the PEM electrolyzer is fixedly communicated with a bypass inlet of the hydrogen mixing jet device, and the water inlet of the hydrogen mixing jet device is communicated with the soft water purification system.

[0013] Preferably, the soft water purification system further comprises a pure water tank, a T33 filter element connected in series on a pipeline fixedly communicated between an input end at the top of the pure water tank and an output end of the RO filter element.

[0014] The water inlet of the low-TDS pure water tank is distributed between the input end of the T33 filter element and the output end of the RO filter element.

[0015] Preferably, a hydrogen-rich water pump is connected in series on a pipeline fixedly communicated between the water inlet of the hydrogen mixing jet device and a water outlet at the bottom of the pure water tank.

[0016] The bypass water outlet of the pure water tank is fixedly communicated with a pure water outlet pipeline connected in series with a pure water outlet valve.

[0017] The water outlet of the hydrogen mixing jet device is fixedly communicated with a hydrogen-rich water outlet pipeline.

[0018] Preferably, a water inlet valve and a booster pump are connected in series on a pipeline fixedly communicated between a water outlet of an activated carbon filter element and a water inlet of the RO filter element.

[0019] Preferably, a water tank is further included, a water gun is centrally installed at the top of the water tank, a three-way connecting pipe is fixedly communicated with an input end of the water gun, and two input ends of the three-way connecting pipe are respectively communicated with the pure water outlet pipeline and the hydrogen-rich water outlet pipeline.

[0020] Preferably, a spray head mounting seat with a built-in spray head is further included, a plug-in surface of the spray head mounting seat is divided into an outer ring and an inner ring according to the structure, a bucket mouth plug-in slot is formed between the outer ring and the inner ring, and the spray head is centrally distributed in the inner ring.

[0021] The spray head mounting seat extends into a port formed at the bottom of the water tank and is in the same plane with the inside bottom of the water tank.

[0022] Further comprising a flushing system, which at least comprises a cleaning water pipe fixedly connected with the input end of the shower head.

[0023] As preferred, the flushing system further comprises a water pump, the input end of which is fixedly communicated with the output end of the pure water tank.

[0024] The output end of the water pump is communicated with the cleaning water pipe, and a water outlet electromagnetic valve is serially communicated on the cleaning water pipe.

[0025] As preferred, an ozone generator is further comprised, the output end of which is communicated with the cleaning water pipe and located between the water electromagnetic valve and the water pump.

[0026] As preferred, the cleaning water pipe is fixedly communicated with the output end of the hydrogen mixing jet.

[0027] As preferred, the number of each of the pp filter core, the activated carbon filter core and the RO filter core is not less than three.

[0028] The low TDS pure water tank and the pure water tank are both provided with high water level sensors and low water level sensors.

[0029] In the above technical solution, the water vending machine provided by the application has the following beneficial effects:

[0030] 1. The efficiency decay and service life shortening problems of the existing hydrogen-rich water equipment caused by electrode pollution are effectively solved. A special resin filter core is connected in series at the water inlet end of the PEM electrolyzer, the filter core can deeply adsorb the ion impurities and organic pollutants remaining after softening and purification, and completely block the path of pollutants contacting the electrolysis electrode. This design avoids electrode scaling or poisoning from the root, so that the electrolytic tank can maintain stable hydrogen production efficiency in long-term operation, and significantly prolongs the service life of the electrolyzer and greatly reduces the maintenance cost.

[0031] 2. The pure hydrogen generated by the PEM electrolyzer is delivered to the hydrogen mixing jet through an independent pipeline, and the oxygen is introduced into the low TDS pure water tank to maintain pressure balance and play a bacteriostatic role; the hydrogen mixing jet directly extracts soft water that has been purified through multiple stages, and the hydrogen gas is efficiently dissolved in the water flow through the Venturi effect of the hydrogen mixing jet. This physical hydrogen mixing mode completely isolates the electrolysis process from the final drinking water, which not only eliminates the risk of electrode secondary pollution, but also avoids the generation of chemical byproducts, ensuring the drinking safety of hydrogen-rich water.

[0032] 3. The RO membrane and the T33 filter core cooperate to control the TDS of the inlet water below 5ppm, providing an ultra-pure water environment for the electrolyzer, so that the hydrogen production concentration is stably higher than 0.8ppm of the national standard; the double water outlet design allows users to select ordinary pure water or hydrogen-rich water as needed, reduces the working frequency of the electrolyzer, and reduces energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed in the embodiments will be briefly introduced as follows. Obviously, the accompanying drawings in the following description only represent some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0034] Figure 1 The structure schematic diagram of the soft water purification system and the hydrogen-rich system is provided for the embodiments of the present application.

[0035] Figure 2 The structure schematic diagram of the flushing system is provided for the embodiments of the present application.

[0036] Figure 3 The structure schematic diagram of the spray head mounting seat and the spray head is provided for the embodiments of the present application.

[0037] Figure 4 The structure schematic diagram of the low-TDS pure water tank, the PEM electrolyzer and the hydrogen-rich water pump is provided for the embodiments of the present application.

[0038] Figure 5 The structure schematic diagram of the resin filter element is provided for the embodiments of the present application.

[0039] Figure 6 The structure schematic diagram of the water injection gun and the tee connection pipe fitting is provided for the embodiments of the present application.

[0040] Figure 7 The flow chart is provided for the embodiments of the present application.

[0041] Explanation of the reference signs:

[0042] 1, soft water purification system; 11, pp filter element; 12, activated carbon filter element; 13, RO filter element; 14, pure water tank; 15, T33 filter element; 16, pure water outlet pipeline; 17, pure water outlet valve; 18, water inlet valve; 19, booster pump; 2, hydrogen-rich system; 21, low-TDS pure water tank; 22, PEM electrolyzer; 23, resin filter element; 3, hydrogen-mixed jet device; 31, hydrogen-rich water outlet pipeline; 4, hydrogen-rich water pump; 5, water injection cabin; 51, water injection gun; 52, tee connection pipe fitting; 6, spray head mounting seat; 61, spray head; 7, flushing system; 71, cleaning water pipeline; 72, water suction pump; 73, water outlet electromagnetic valve; 74, ozone generator; 8, waste water valve; 200, high water level sensor; 201, low water level sensor; 300, electrolytic water pump. DETAILED DESCRIPTION

[0043] In order to make the skilled in the art better understand the technical solutions of the present application, the present application will be further described in detail in combination with the accompanying drawings.

[0044] Please refer to Figures 1-7 The embodiment of the present application provides a technical scheme: a water vending machine, comprising:

[0045] The soft water purification system 1 at least includes a pp filter core 11, an activated carbon filter core 12, an RO filter core 13 and a pure water tank 14, and a pipeline fixedly communicated between the input end of the top of the pure water tank 14 and the output end of the RO filter core 13 is serially communicated with a T33 filter core 15. Secondly, the water inlet of the low-TDS pure water tank 21 is distributed between the input end of the T33 filter core 15 and the output end of the RO filter core 13.

[0046] The hydrogen-rich system 2 includes a low-TDS pure water tank 21 and a PEM electrolyzer 22, a pipeline fixedly communicated between the water outlet of the low-TDS pure water tank 21 and the inlet and outlet of the PEM electrolyzer 22 is serially communicated with an electrolytic water pump 300 and a resin filter core 23 (effective absorption and removal of trace ions (such as calcium, magnesium and heavy metals) and dissolved organic matter that may still remain after RO purification, which belongs to the pre-protection function, fundamentally eliminates the adsorption, scaling or poisoning of pollutants on the electrode surface of the PEM electrolyzer 22, ensures that the electrolytic electrode maintains high efficiency and stable hydrogen production performance for a long time, and significantly prolongs the service life of the electrolyzer);

[0047] The water inlet of the low-TDS pure water tank 21 is communicated with the water outlet of the RO filter core 13.

[0048] The oxygen outlet of the PEM electrolyzer 22 is fixedly communicated with the inlet of the low-TDS pure water tank 21.

[0049] The input end of the electrolytic water pump 300 is communicated with the water outlet of the low-TDS pure water tank 21, and the output end is communicated with the input end of the resin filter core 23.

[0050] Further comprising a hydrogen mixing jet device 3, the hydrogen gas outlet of the PEM electrolyzer 22 is fixedly communicated with the bypass inlet of the hydrogen mixing jet device 3, and the water inlet of the hydrogen mixing jet device 3 is communicated with the soft water purification system 1. The water inlet of the hydrogen mixing jet device 3 and the water outlet at the bottom of the pure water tank 14 are fixedly communicated with a pipeline, and the pipeline is serially communicated with a hydrogen-rich water pump 4. The bypass water outlet of the pure water tank 14 is fixedly communicated with a pure water outlet pipeline 16 serially communicated with a pure water outlet valve 17, and the water outlet of the hydrogen mixing jet device 3 is fixedly communicated with a hydrogen-rich water outlet pipeline 31 (the physical hydrogen mixing mode completely separates the hydrogen production (electrolysis) process from the final drinking water, completely eliminates the risk of “secondary pollution” caused by the drinking water flowing through the electrolytic tank, and avoids the mixing of electrolysis byproducts (such as trace ozone and free radicals) into the hydrogen-rich water, thereby maximizing the purity, safety and health efficacy of the hydrogen-rich water).

[0051] Specifically, the tap water in the embodiment is input to the soft water purification system 1 of the water vending machine, and then sequentially passes through the pp filter element 11, the activated carbon filter element 12, and the RO filter element 13 for processing. It should be noted that the number of the pp filter element 11 is three, the number of the activated carbon filter element 12 is three, and the number of the RO filter element 13 is three.

[0052] Further, the water outlet of the activated carbon filter element 12 and the water inlet of the RO filter element 13 are fixedly connected, and a water inlet valve 18 and a booster pump 19 are connected in series on the pipeline.

[0053] Furthermore, the high water level sensor 200 and the low water level sensor 201 are arranged in the low TDS pure water tank 21 and the pure water tank 14. When the water level is lower than the low water level sensor 201, the system is automatically started, so as to supplement the liquid in the low TDS pure water tank 21 and the pure water tank 14. When the water level is higher than the high water level sensor 200, the system is automatically stopped.

[0054] Further, the input end of the waste water valve 8 is fixedly connected with another output end of the RO filter element 13, and then is discharged into the concentrated water discharge, so as to clean the pp filter element 11, the activated carbon filter element 12, and the RO filter element 13, which belongs to the conventional technology and will not be described in detail.

[0055] In the above technology, the efficiency decay and service life shortening problems of the existing hydrogen-rich water equipment caused by electrode pollution are effectively solved. The special resin filter element 23 is connected in series at the water inlet of the PEM electrolyzer 22. The filter element 23 can deeply adsorb the ion impurities and organic pollutants remaining after softening and purification, and completely block the path of pollutants contacting the electrolytic electrode. This design avoids electrode scaling or poisoning from the root, so that the electrolytic tank can maintain stable hydrogen production efficiency in long-term operation, and significantly prolongs the service life of the PEM electrolyzer 22, greatly reduces the maintenance cost. The pure hydrogen generated by the PEM electrolyzer 22 is transported to the hydrogen mixing jet device 3 through an independent pipeline, and the oxygen is introduced into the low TDS pure water tank 21 to maintain pressure balance and play a bacteriostatic role; the hydrogen mixing jet device 3 directly extracts the soft water after the multi-stage purification of the pp filter element 11→the activated carbon 12→the RO membrane 13→the T33 post carbon 15, and the hydrogen is efficiently dissolved in the water flow through the Venturi effect of the hydrogen mixing jet device 3. This physical hydrogen mixing mode completely isolates the electrolysis process from the final drinking water, which not only eliminates the risk of electrode secondary pollution, but also avoids the generation of chemical by-products, and guarantees the drinking safety of the hydrogen-rich water. The RO membrane 14 and the T33 filter element 15 cooperate to control the TDS of the inlet water below 5ppm, providing an ultra-pure water environment for the PEM electrolyzer 22, so that the hydrogen production concentration is stably higher than 0.8ppm of the national standard; the double water outlet design allows users to select ordinary pure water or hydrogen-rich water as needed, reduces the working frequency of the electrolyzer, and reduces energy consumption.

[0056] As a further provided embodiment of the present application, the water dispenser 1 is internally installed with a water tapping tank 5 fixed by screws, and the hatch of the water tapping tank 5 is communicated with the opening on the water dispenser 1. Further, the water dispenser 1 is also fixedly installed with an electric push rod, and the hatch of the water tapping tank 5 is shielded and covered by the door plate fixedly installed on the electric push rod through the electric push rod.

[0057] Further, in combination with Figure 2 As shown in the drawings, the water tapping tank 5 is centrally installed with a water injection gun 51 at the top, and the input end of the water injection gun 51 is fixedly communicated with a three-way connecting pipe 52, and the two input ends of the three-way connecting pipe 52 are respectively communicated with the pure water outlet pipeline 16 and the hydrogen-rich water outlet pipeline 31.

[0058] The spray head mounting seat 6 is fixed by screws at the bottom of the water tapping tank 5, and then the plug-in surface of the spray head mounting seat 6 is divided into an outer ring and an inner ring according to the structure, and the water bucket mouth plug-in groove is formed between the outer ring and the inner ring, and the spray head 61 is centrally distributed in the inner ring. The spray head mounting seat 6 extends into the port opened at the bottom of the water tapping tank 5 and is in the same plane with the inner side of the bottom of the water tapping tank 5.

[0059] It also includes a flushing system 7, which at least includes a cleaning water pipe 71 and a water suction pump 72, which is fixedly connected with the input end of the spray head 61, and the input end of the water suction pump 72 is fixedly communicated with the output end of the pure water tank 14, the output end of the water suction pump 72 is communicated with the cleaning water pipe 71, and the cleaning water pipe 71 is serially communicated with a water outlet electromagnetic valve 73.

[0060] The output end of the ozone generator 74 is also communicated with the cleaning water pipe 71 and located between the water electromagnetic valve 73 and the water suction pump 72. Then the cleaning water pipe 71 is fixedly communicated with the output end of the hydrogen mixing jet device 3.

[0061] When performing cleaning, start the water suction pump 72, turn on the ozone generator 71, and open the water outlet electromagnetic valve 73. The ozone water passes through the bottom water outlet spray head 71 to flush the water bucket. After 15 seconds of flushing, turn off the ozone generator 71, use pure water to flush for 5 seconds, and flush for a total of 20 seconds. After cleaning is completed, turn off the water suction pump 72 and the water outlet electromagnetic valve 72.

[0062] Working principle: control through the operation panel on the front of the water dispenser, and the control content includes:

[0063] Bucket cleaning mode:

[0064] 1. The user inverts the empty water bucket, inserts the bucket mouth into the water bucket mouth plug-in groove of the spray head mounting seat 6, and the telescopic motor drives the locking plate to lock the bucket mouth.

[0065] 2. The user selects the "cleaning mode" through the operation panel.

[0066] 3. System starts: water pump 72, ozone generator 74, water outlet solenoid valve 73 open.

[0067] 4. Pure water and ozone mix in the cleaning water pipe 71 to form ozone water, which is sprayed upward by the nozzle 61 to clean and disinfect the inner wall of the inverted bucket (ozone water has strong oxidizing properties, can effectively kill bacteria, viruses, remove organic residues, and the sterilization rate is >99.9%).

[0068] 5. After about 15 seconds of continuous flushing, the ozone generator 74 is turned off, and the system continues to flush with pure water for about 5 seconds, for a total of about 20 seconds, to remove residual ozone.

[0069] 6. Turn off the water pump 72 and the water outlet solenoid valve 73. The waste water generated by cleaning is discharged through the gap between the nozzle mounting seat 6 and the bucket opening and the bottom of the water hitting tank 5.

[0070] Bucket filling mode:

[0071] 1. The user places the cleaned bucket upright into the water hitting tank 5, with the bucket opening aligned with the water filling gun 51.

[0072] 2. The user selects the "filling mode" on the operation panel and selects the desired water type (pure water or hydrogen-rich water) and water volume (or corresponding weight).

[0073] 3. The system controls the corresponding solenoid valve on the three-way connecting pipe 52 according to the selection, so that the pure water outlet pipe 16 or the hydrogen-rich water outlet pipe 31 is connected to the water filling gun 51.

[0074] 5. The gravity sensor detects the initial weight of the bucket.

[0075] 6. Open the corresponding waterway valve, and water is injected into the bucket through the water filling gun 51.

[0076] 7. The gravity sensor monitors the weight in real time, and when the preset target weight is reached, the system automatically closes the valve and stops filling.

[0077] It should be noted that the cleaning mode and the filling mode need to be selected separately.

[0078] The above only describes some exemplary embodiments of the present application by way of illustration, and it is not necessary to modify the described embodiments in various ways without deviating from the spirit and scope of the present application for those skilled in the art. Therefore, the above figures and description are illustrative in nature and should not be understood as limiting the scope of protection claimed by the present application.

Claims

1. A water vending machine, characterized by, The application relates to a soft water purification system (1) comprising at least a pp filter core (11), an active carbon filter core (12) and an RO filter core (13); a hydrogen-rich system (2) comprising a low-TDS pure water tank (21) and a PEM electrolyzer (22), a resin filter core (23) being connected in series on a pipeline fixedly communicated between a water outlet of the low-TDS pure water tank (21) and an inlet and outlet of the PEM electrolyzer (22); wherein the water inlet of the low-TDS pure water tank (21) is communicated with the water outlet of the RO filter core (13); the oxygen outlet of the PEM electrolyzer (22) is fixedly communicated with the water inlet of the low-TDS pure water tank (21); the hydrogen-rich system (2) further comprises a hydrogen mixing jet device (3), the hydrogen outlet of the PEM electrolyzer (22) is fixedly communicated with a bypass inlet of the hydrogen mixing jet device (3), and the water inlet of the hydrogen mixing jet device (3) is communicated with the soft water purification system (1). The soft water purification system (1) further comprises a pure water tank (14), a T33 filter core (15) being connected in series on a pipeline fixedly communicated between an input end at the top of the pure water tank (14) and an output end of the RO filter core (13); the water inlet of the low-TDS pure water tank (21) is distributed between the input end of the T33 filter core (15) and the output end of the RO filter core (13). The water inlet of the hydrogen mixing jet device (3) is fixedly communicated with a water outlet at the bottom of the pure water tank (14), a hydrogen-rich water pump (4) being connected in series on a pipeline fixedly communicated between the water inlet of the hydrogen mixing jet device (3) and the water outlet at the bottom of the pure water tank (14); a bypass water outlet of the pure water tank (14) is fixedly communicated with a pure water outlet pipeline (16) in which a pure water outlet valve (17) is connected in series; a hydrogen-rich water outlet pipeline (31) is fixedly communicated with a water outlet of the hydrogen mixing jet device (3). The water outlet of the active carbon filter core (12) is fixedly communicated with the water inlet of the RO filter core (13), an inlet valve (18) and a booster pump (19) being connected in series on a pipeline fixedly communicated between the water outlet of the active carbon filter core (12) and the water inlet of the RO filter core (13). The application further comprises a water hitting cabin (5), a water gun (51) being centrally arranged at the top of the water hitting cabin (5), three-way connecting pipe fittings (52) being fixedly communicated with the input end of the water gun (51), and the two input ends of the three-way connecting pipe fittings (52) being communicated with the pure water outlet pipeline (16) and the hydrogen-rich water outlet pipeline (31) respectively. The application further comprises a nozzle mounting base (6) in which nozzles (61) are arranged, the plug-in surface of the nozzle mounting base (6) being divided into an outer ring and an inner ring according to the structure, a bucket mouth plug-in groove being formed between the outer ring and the inner ring, and the nozzles (61) being centrally arranged in the inner ring; the nozzle mounting base (6) extends into a port arranged at the bottom of the water hitting cabin (5) and is in the same plane with the inner bottom of the water hitting cabin (5).

2. The water vending machine of claim 1, wherein The application further comprises a flushing system (7) comprising at least a cleaning water pipeline (71) fixedly connected with the input end of the nozzle (61). The flushing system (7) further comprises a water suction pump (72) of which the input end is fixedly communicated with the output end of the pure water tank (14).

3. The water vending machine of claim 2, wherein, ​ ​ ​ 4. The water vending machine of claim 1, wherein ​ 5. The water vending machine of claim 3, wherein ​ 6. The water vending machine of claim 2, wherein ​ ​ ​ 7. The water vending machine of claim 6, wherein ​ The output end of the water pump (72) is communicated with the cleaning water pipe (71), and a water outlet electromagnetic valve (73) is connected in series on the cleaning water pipe (71).

8. The water vending machine of claim 7, wherein, Further comprising an ozone generator (74), the output end of the ozone generator (74) is communicated with the cleaning water pipe (71) and is located between the water electromagnetic valve (73) and the water pump (72).

9. The water vending machine of claim 1, wherein, The cleaning water pipe (71) is fixedly communicated with the output end of the hydrogen mixing jet device (3).

10. The water vending machine of claim 1, wherein, Further comprising an electrolytic water pump (300), the input end of the electrolytic water pump (300) is communicated with the water outlet of the low TDS pure water tank (21), and the output end of the electrolytic water pump (300) is communicated with the input end of the resin filter element (23).

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