CN220529803U - Anti-scaling and high-temperature sterilization waterway system and water dispenser - Google Patents

Abstract

The utility model provides an anti-scaling and high-temperature sterilization waterway system and a water dispenser, wherein the anti-scaling and high-temperature sterilization waterway system comprises a water tank, a cold tank, an instant heater, an acid water storage tank, a first two-position three-way valve and a second two-position three-way valve; the water outlet of the water tank is connected with the water inlet of the instant heater through a water supply pipeline; the water outlet of the instant heater is connected with the inlet of a first two-position three-way valve, the first outlet of the first two-position three-way valve is connected with the water outlet nozzle through a hot water outlet pipeline, and the second outlet of the first two-position three-way valve is connected with the water outlet nozzle through a cold water outlet pipeline; the cold tank is arranged on the cold water outlet pipeline; an inlet of the second two-position three-way valve is communicated with a water outlet of the cold tank, a first outlet of the second two-position three-way valve is communicated with the water outlet nozzle, and a second outlet of the second two-position three-way valve is connected to a water supply pipeline; the water outlet of the acid water storage tank is connected to a water supply pipeline. The utility model can not only sterilize the cold tank and the front and back pipelines of the cold tank at high temperature, but also prevent the instant heater from scaling.

Description

Anti-scaling and high-temperature sterilization waterway system and water dispenser

Technical Field

The utility model belongs to the technical field of small household appliances, and particularly relates to an anti-scaling and high-temperature sterilization waterway system and a water dispenser.

Background

The pipeline machine in the current market is likely to grow bacteria in the use process, and particularly, bacteria are more likely to grow due to residual dead water in a cold tank of the pipeline machine. In order to sterilize the cold tank in the prior art, the instant heating module is utilized to heat the water in the water tank and then flow into the cold tank, but the pipeline and the water outlet nozzle cannot be sterilized. Moreover, after the pipeline machine is used for a period of time, namely the hot module is easy to scale, the heating time is prolonged or the heating temperature is lowered, and the use experience is reduced.

Disclosure of Invention

In view of the above problems in the prior art, an object of an embodiment of the present utility model is to provide an anti-scaling and high-temperature sterilizing waterway system and a water dispenser, which can sterilize a cold tank and a pipeline in front of and behind the cold tank, and can prevent instant heater scaling.

The technical scheme adopted by the embodiment of the utility model is that the scale-preventing and high-temperature sterilizing waterway system comprises a water tank, a cold tank, an instant heater, an acid water storage tank, a first two-position three-way valve and a second two-position three-way valve;

the water outlet of the water tank is connected with the water inlet of the instant heater through a water supply pipeline;

the water outlet of the instant heater is connected with the inlet of the first two-position three-way valve, the first outlet of the first two-position three-way valve is connected with the water outlet nozzle through a hot water outlet pipeline, and the second outlet of the first two-position three-way valve is connected with the water outlet nozzle through a cold water outlet pipeline;

the cold tank is arranged on the cold water outlet pipeline;

the second two-position three-way valve is arranged on the cold water outlet pipeline between the cold tank and the water outlet nozzle, the inlet of the second two-position three-way valve is communicated with the water outlet of the cold tank, the first outlet of the second two-position three-way valve is communicated with the water outlet nozzle, and the second outlet of the second two-position three-way valve is connected to the water supply pipeline through a water return pipeline;

the water outlet of the acid water storage tank is connected to the water supply pipeline through an acid water supply pipeline.

In an alternative embodiment, the acid water supply pipeline is provided with a first water suction pump and a first check valve, and the first water suction pump is located upstream of the first check valve in the flowing direction of the acid water. Thus, the power can be provided for the flowing of the acid water, and the water in the water supply pipeline and the water return pipeline can be prevented from flowing back into the acid water storage tank.

In an alternative embodiment, the water supply pipeline is sequentially provided with a second water suction pump, a filter and a second check valve along the water flow direction. Can provide power for water and clean water.

In an alternative embodiment, in the water flow direction of the water supply pipeline, the connection part of the water supply pipeline and the water supply pipeline is located at the downstream of the second check valve and is close to the instant heater, and the connection part of the water return pipeline and the water supply pipeline is located at the downstream of the connection part of the water supply pipeline and is close to the instant heater. Reasonable in design, the water of the return water pipeline of being convenient for and the interior sour water of confession sour water pipeline directly get into in the instant heater, avoid extravagant.

In an alternative embodiment, the instant heater is a thick film heater. The thick film heater has small volume, high temperature rising speed, high heat efficiency and long service life.

In an alternative embodiment, a third water suction pump and a third check valve are arranged on the hot water outlet pipeline, and the third water suction pump is positioned upstream of the third check valve in the flowing direction of the hot water. Can provide power for hot water transportation and can prevent cold water in the cold water outlet pipeline from flowing back into the hot water outlet pipeline.

The embodiment of the utility model also provides a water dispenser, which comprises a machine body and the anti-scaling and high-temperature sterilization waterway system in any embodiment. The water dispenser not only can realize normal-temperature water sterile drinking, but also can ensure that the drinking water is safer and healthier; meanwhile, the instant heater can be prevented from scaling, and the heating water efficiency and the heating water temperature are ensured.

In an alternative embodiment, a sterilization operation part is arranged on the machine body, a control unit is arranged in the machine body, and the control unit is respectively connected with the sterilization operation part, a first two-position three-way valve, a second two-position three-way valve, an instant heater and a fourth water suction pump on the cold water outlet pipeline;

the sterilization operation part responds to the operation of a user and sends a first signal to the control unit;

the control unit is used for controlling the instant heater and the fourth water pump to start when the first signal is received, controlling the opening of a passage between the inlet of the first two-position three-way valve and the second outlet of the first two-position three-way valve, opening the passage between the inlet of the second two-position three-way valve and the second outlet of the second two-position three-way valve, and conveying water in the cold tank to the instant heater for heating by the fourth water pump and returning the water to the cold tank. Thus, one-key automatic high-temperature sterilization can be realized.

In an alternative embodiment, a temperature sensor is arranged in the cold tank, a timing unit is also arranged in the machine body, and the control unit is respectively connected with the temperature sensor and the timing unit;

the temperature sensor is used for detecting the temperature of water in the cold tank, sending a second signal to the control unit when the water temperature in the cold tank reaches a first temperature threshold value, and controlling the fourth water pump to be closed and controlling the second two-position three-way valve to be closed when the second signal is received;

the timing unit is used for measuring the time when the water temperature in the cold tank reaches the first temperature threshold value, sending a third signal to the control unit when the time measured by the timing unit reaches the first time threshold value, and controlling the fourth water suction pump to be started when the third signal is received, and controlling a passage between the inlet of the second two-position three-way valve and the first outlet of the second two-position three-way valve to be opened so as to send hot water in the cold tank to the water outlet nozzle for discharging. Therefore, the temperature and the disinfection time of high-temperature hot water disinfection can be ensured, and the disinfection effect is improved.

In an optional embodiment, the timing unit is further configured to measure a usage time period of the instant heater, send a fourth signal to the control unit when the usage time period measured by the timing unit reaches a second time threshold, and when receiving the fourth signal, control a first water pump and the instant heater on the acid water supply pipeline to start, and control a passage between an inlet of the first two-position three-way valve and a first outlet of the first two-position three-way valve to open, so as to convey acid water in the acid water storage tank to the instant heater for descaling;

the timing unit is further used for measuring the time after the acid water enters the instant heater, sending a fifth signal to the control unit when the time after the acid water enters the instant heater, which is measured by the timing unit, reaches a third time threshold, and controlling the third water suction pump on the hot water outlet pipeline to be started when the fifth signal is received, so that the acid water after descaling in the instant heater is discharged through the hot water outlet pipeline and the water outlet nozzle. Therefore, the water dispenser can automatically start the descaling operation of the instant heater, and the convenience is improved.

The embodiment of the utility model can sterilize the cold tank and the pipeline at high temperature until the water outlet nozzle ensures sterility; can also remove the scaling on the instant heater regularly, avoid scaling to cause heating time to become longer or the temperature to become lower.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model, as claimed.

An overview of various implementations or examples of the technology described in this disclosure is not a comprehensive disclosure of the full scope or all of the features of the technology disclosed.

Drawings

In the drawings, which are not necessarily drawn to scale, like numerals may describe similar components in different views. The accompanying drawings illustrate various embodiments by way of example in general and not by way of limitation, and together with the description and claims serve to explain the inventive embodiments. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

FIG. 1 is a schematic diagram of an anti-scaling and high temperature sterilization waterway system according to an embodiment of the present utility model.

Fig. 2 is a circuit diagram of a high-temperature sterilization part according to an embodiment of the present utility model.

FIG. 3 is a circuit diagram of an acid descaling part according to an embodiment of the present utility model.

Reference numerals:

1-a water tank; 2-a cold tank; 3-an instant heater; 4-an acid water storage tank; 5-a first two-position three-way valve; 6-a second two-position three-way valve; 7-a water supply pipeline; 8-a water outlet nozzle; 9-a hot water outlet pipeline; 10-a cold water outlet pipeline; 11-a water return line; 12-an acid water supply pipeline; 13-a filter; 14-a first water pump; 15-a second water suction pump; 16-a third water pump; 17-a fourth water pump; 18-a first non-return valve; 19-a second non-return valve; 20-a third check valve; 21-a fourth check valve; 22-fifth check valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present utility model fall within the protection scope of the present utility model.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

In order to keep the following description of the embodiments of the present utility model clear and concise, the detailed description of known functions and known components thereof have been omitted.

The embodiment of the utility model provides an anti-scaling and high-temperature sterilization waterway system which can be applied to pipeline machines. Pipeline machines include, but are not limited to, water dispensers.

As shown in fig. 1, the anti-scaling and high-temperature sterilization waterway system of the embodiment of the utility model mainly comprises a water tank 1, a cold tank 2, an instant heater 3, an acid water storage tank 4, a first two-position three-way valve 5 and a second two-position three-way valve 6. The water outlet of the water tank 1 is connected with the water inlet of the instant heater 3 through a water supply pipeline 7. The water outlet of the instant heater 3 is connected with the inlet of a first two-position three-way valve 5, the first outlet of the first two-position three-way valve 5 is connected with a water outlet nozzle 8 through a hot water outlet pipeline 9, and the second outlet of the first two-position three-way valve 5 is connected with the water outlet nozzle 8 through a cold water outlet pipeline 10. The cold tank 2 is arranged on the cold water outlet pipeline 10. The second two-position three-way valve 6 is arranged on a cold water outlet pipeline 10 between the cold tank 2 and the water outlet nozzle 8, the inlet of the second two-position three-way valve 6 is communicated with the water outlet of the cold tank 2, the first outlet of the second two-position three-way valve 6 is communicated with the water outlet nozzle 8, and the second outlet of the second two-position three-way valve 6 is connected to the water supply pipeline 7 through a water return pipeline 11. The water outlet of the acid water storage tank 4 is connected to the water supply line 7 through an acid water supply line 12.

When the cold tank 2 is not used for a certain time, the anti-scaling and high-temperature sterilization waterway system provided by the embodiment of the utility model can send the water in the cold tank 2 into the instant heater 3 through the second two-position three-way valve 6 to be heated and then return to the cold tank 2, so that the cold tank 2 is sterilized by high-temperature hot water, the sterilized high-temperature hot water is discharged through the cold water outlet pipeline 10 and the water outlet nozzle 8, and the cold water outlet pipeline 10 and the water outlet nozzle 8 are sterilized simultaneously in the discharging process, so that the sterilization is thorough, and the water use safety is improved; in addition, by providing the acid water storage tank 4, when the instant heater 3 is heated and used for a certain period of time, the acid water in the acid water storage tank 4 is sent to the instant heater 3 to scale the instant heater 3, so that the instant heater 3 is prevented from reducing heating efficiency and water temperature due to scaling.

The acid water in the acid water tank 4 may be fed to the instant heater 3 in any possible manner, and for example, the acid water tank 4 may be provided above the instant heater 3, and the acid water may automatically flow into the instant heater 3 by gravity of the acid water itself. In some embodiments, as shown in fig. 1 and 3, a first water pump 14 is provided on the acid water supply pipeline 12, and the first water pump 14 provides power for the flow of acid water to convey the acid water in the acid water storage tank 4 into the instant heater 3. The acid water supply line 12 is further provided with a first non-return valve 18, and the first water pump 14 is located upstream of the first non-return valve 18 in the flow direction of the acid water. The first check valve 18 allows only the acid water to flow in the direction indicated by the arrows in fig. 1 and 3, preventing the water in the water supply line 7 and the water return line 11 from flowing back into the acid water tank 4.

The acid water in the acid water storage tank 4 can be citric acid water, so that the descaling effect is good, the citric acid is edible acid, and the drinking safety problem can not exist.

The water in the water tank 1 may be fed into the instant heater 3 by any means that is possible, for example, the water tank 1 may be provided above the instant heater 3, and the water may automatically flow into the instant heater 3 by gravity of the water itself. In some embodiments, as shown in fig. 1 and 2, a second water pump 15 is provided on the water supply line 7, the second water pump 15 providing power for the flow of water to deliver water from the tank 1 into the instant heater 3.

The water supply line 7 is further provided with a filter 13 and a second non-return valve 19. The second suction pump 15, the filter 13 and the second non-return valve 19 are arranged in this order in the water flow direction. By providing the filter 13, the water in the water tank 1 can be filtered to form purified water. The type of the filter 13 can be selected and determined according to the needs, for example, the filter 13 can be in the form of activated carbon and ultrafiltration, the activated carbon can absorb fine substances in water, and the water can be decolorized, deodorized, dechlorinated, and organic matters, heavy metals, bacteria and the like can be removed. The ultrafiltration can effectively remove particles, colloid, bacteria and high molecular organic substances in the water.

In some embodiments, continuing to refer to fig. 1 and 2, the junction of the acid water supply line 12 and the water supply line 7 is located downstream of the second check valve 19 and near the instant heater 3, and the junction of the return line 11 and the water supply line 7 is located downstream of the junction of the acid water supply line 12 and the water supply line 7 and near the instant heater 3, in the water flow direction of the water supply line 7. Reasonable in design is convenient for the water of return pipe 11 and the sour water in the sour water supply pipeline 12 directly get into in the instant heater 3, avoids extravagant.

That is, the type of the heater 3 is not limited as long as it can instantly heat the water supplied from the water tank 1 through the water supply line 7 to supply the hot water to the user. For example, the instant heater 3 may employ a thick film heater. The thick film heater has small volume, high temperature rising speed, high heat efficiency and long service life.

As shown in fig. 1 and 3, the hot water pipe 9 is provided with a third water pump 16 and a third check valve 20, and the third water pump 16 is located upstream of the third check valve 20 in the flow direction of the hot water. By providing the third water pump 16, the hot water heated by the instant heater 3 can be delivered to the water outlet nozzle 8 to supply hot water to the user. The third check valve 20 can prevent cold water in the cold water outlet pipeline 10 from flowing back into the hot water outlet pipeline 9.

As further shown in fig. 1 and 2, the fourth water pump 17 and the fourth check valve 21 are provided in the cold water outlet pipe 10, and the cold water tank 2, the fourth water pump 17, the second two-position three-way valve 6 and the fourth check valve 21 are provided in this order in the flow direction of the cold water. In this way, the cold water in the cold tank 2 can pass through the first outlet of the second two-position three-way valve 6 by the fourth water suction pump 17 and flow through the fourth check valve 21 to be finally discharged by the water outlet nozzle 8, so as to provide cold water for users for use.

The fifth check valve 22 can be arranged on the water return pipeline 11, so that the hot water can be prevented from flowing reversely in the water return pipeline 11 to influence the hot water sterilization effect when the cold tank 2 and the pipeline are subjected to high-temperature hot water sterilization treatment.

The embodiment of the utility model also provides a water dispenser, which comprises a machine body and the anti-scaling and high-temperature sterilization waterway system in any embodiment. The water dispenser not only can sterilize the cold tank 2, but also can sterilize the cold water outlet pipeline 10 at high temperature, so that normal-temperature water sterile drinking is realized, and the drinking water is safer and healthier. Solving the problems of safe and healthy drinking water, improving the market demand and being suitable for domestic consumer market demand; meanwhile, the scaling of the instant heater 3 can be prevented, and the heating water efficiency and the heating water temperature are ensured.

In some embodiments, a sterilization operation part is arranged on the machine body, and a control unit is arranged in the machine body and is respectively connected with the sterilization operation part, the first two-position three-way valve 5, the second two-position three-way valve 6, namely the heater 3 and the fourth water suction pump 17 on the cold water outlet pipeline 10. The sterilization operation part responds to the operation of a user and sends a first signal to the control unit. The control unit is used for controlling the instant heater 3 and the fourth water pump 17 to start when receiving the first signal, controlling the opening of a passage between the inlet of the first two-position three-way valve 5 and the second outlet thereof, opening the passage between the inlet of the second two-position three-way valve 6 and the second outlet thereof, and the fourth water pump 17 conveying the water in the cold tank 2 to the instant heater 3 for heating and returning to the cold tank 2.

The sterilization operation component can be a touch pad or a key or a button, and a user realizes one-key automatic high-temperature sterilization through the touch sterilization operation component.

In some embodiments, a temperature sensor is arranged in the cold tank 2, a timing unit is also arranged in the machine body, and the control unit is respectively connected with the temperature sensor and the timing unit. The temperature sensor is used for detecting the temperature of water in the cold tank 2, sending a second signal to the control unit when the temperature of water in the cold tank 2 reaches a first temperature threshold (for example, 95 degrees), and controlling the fourth water pump 17 to be closed and controlling the second two-position three-way valve 6 to be closed when the second signal is received. The timing unit is used for measuring the time (for example, 1 minute) that the water temperature in the cold tank 2 reaches the first temperature threshold value, sending a third signal to the control unit when the time measured by the timing unit reaches the first time threshold value, and the control unit is also used for controlling the fourth water suction pump 17 to be started when receiving the third signal and controlling the passage between the inlet of the second two-position three-way valve 6 and the first outlet thereof to be opened so as to send the hot water in the cold tank 2 to the water outlet nozzle 8 for discharging. Therefore, the temperature and the disinfection time of high-temperature hot water disinfection can be ensured, and the disinfection effect is improved.

In some embodiments, the timing unit is further configured to measure a usage period of the instant heater 3, and send a fourth signal to the control unit when the usage period measured by the timing unit reaches a second time threshold (for example, the accumulated usage period is about 360 hours), and the control unit is further configured to control the first water pump 14 on the acid water supply pipeline 12 and the instant heater 3 to be started when receiving the fourth signal, and control the opening of a passage between the inlet of the first two-position three-way valve 5 and the first outlet thereof, so as to convey the acid water in the acid water tank 4 to the instant heater 3 for descaling. Therefore, after the instant heater 3 is used for a certain time in an accumulated manner, the water dispenser can automatically start the descaling operation of the instant heater 3, and convenience is improved.

The timing unit is further configured to measure a time after the acid water enters the instant heater 3, send a fifth signal to the control unit when the time after the acid water measured by the timing unit enters the instant heater 3 reaches a third time threshold (for example, 10 minutes), and control the third water pump 16 on the hot water pipeline 9 to be turned on when the fifth signal is received, so that the acid water after the descaling in the instant heater 3 is discharged through the hot water outlet pipeline 9 and the water outlet nozzle 8. In this way, the residence time of the acid water in the instant heater 3 can be controlled, ensuring the descaling effect.

The machine body of the water dispenser can be also provided with a descaling button, a hot water button, a cold water button and a normal temperature water button.

When a user needs to use hot water, a hot water button is pressed, the second water pump 15, the filter 13, the instant heater 3 and the third water pump 16 are all started, the first water pump 14, the fourth water pump 17, the second two-position three-way valve 6 and the refrigerating system of the cold tank 2 are all closed, a passage between the inlet of the first two-position three-way valve 5 and the first outlet of the first two-position three-way valve is opened, a passage between the inlet of the first two-position three-way valve 5 and the second outlet of the first two-position three-way valve is closed, water in the water tank 1 is filtered by the filter 13 under the power provided by the second water pump 15 to form purified water, the purified water enters the instant heater 3 to be heated into hot water, and the hot water enters the hot water outlet pipeline 9 through a passage between the inlet of the first two-position three-way valve 5 and the first outlet under the action of the third water pump 16 and finally flows out of the water outlet nozzle 8 for the user to use.

When a user needs to use cold water, pressing a cold water key, opening the second water pump 15, the filter 13, the fourth water pump 17 and the refrigerating system of the cold tank 2, closing the first water pump 14, the third water pump 16 and the instant heater 3, opening a passage between an inlet of the first two-position three-way valve 5 and a second outlet thereof, closing a passage between an inlet of the first two-position three-way valve 5 and a first outlet thereof, opening a passage between an inlet of the second two-position three-way valve 6 and a first outlet thereof, and closing a passage between an inlet of the first two-position three-way valve 5 and a second outlet thereof; the water in the water tank 1 is filtered by the filter 13 under the power provided by the second water pump 15 to form purified water which flows through the instant heater 3, the instant heater 3 is not started and can not be heated, the purified water enters the cold tank 2 to be cooled to form cold water, and the cold water enters the water outlet nozzle 8 and flows out through a passage between the inlet of the second two-position three-way valve 6 and the first outlet under the action of the fourth water pump 17 for users to use.

When the user needs to use normal-temperature water, the normal-temperature water key is pressed, namely, the refrigerating systems of the heater 3 and the cold tank 2 are closed, water in the water tank 1 is provided with power by the second water suction pump 15, filtered into purified water by the filter 13, directly flows through the instant heater 3, enters the hot water outlet pipeline 9 through the inlet and the first outlet of the first two-position three-way valve 5 under the action of the third water suction pump 16, flows out of the water outlet nozzle 8, and is provided for the user normal-temperature water. Or the purified water flowing through the instant heater 3 enters the cold tank 2 through the inlet and the second outlet of the first two-position three-way valve 5, flows through the inlet and the first outlet of the second two-position three-way valve 6 under the action of the fourth water suction pump 17, and finally flows out of the water outlet nozzle 8 for users to use.

When the water in the cold tank 2 is accumulated for about 48 hours and high-temperature sterilization is needed, the first water pump 14, the second water pump 15, the third water pump 16 and the refrigerating system of the cold tank 2 are all closed according to the sterilization operation parts, as shown in fig. 2, the fourth water pump 17 starts to pump out the water in the cold tank 2, the inlet of the first two-position three-way valve 5 is opened with its own second outlet passage, the inlet of the first two-position three-way valve 5 is closed with its own first outlet passage, the inlet of the second two-position three-way valve 6 is opened with its own second outlet passage, the inlet of the second two-position three-way valve 6 is closed with its own first outlet passage, the water in the cold tank 2 flows through the inlet and the second outlet of the second two-position three-way valve 6 via the fourth water pump 17, and the fifth check valve 22 returns to the instant heater 3, i.e. the water is heated to 95 ℃ by the heater 3 and returned to the cold tank 2 through the inlet and the second outlet of the first two-position three-way valve 5, when the temperature sensor detects that the water temperature in the cold tank 2 reaches more than 95 ℃, a signal is sent to the control unit, the control unit controls the fourth water pump to be closed, the second two-position three-way valve 6 is also closed (the passage of the inlet of the second two-position three-way valve and the passage of the inlet of the second two-position three-way valve 6 and the passage of the inlet of the second two-position three-way valve are both closed), the water in the cold tank 2 stops circulating, the timing unit measures the high-temperature hot water to keep sterilizing in the cold tank 2 for 1 minute, the timing unit sends a signal to the control unit, the control unit controls the fourth water pump 17 to be opened, and controls the passage between the inlet of the second two-position three-way valve 6 and the first outlet thereof to be opened, the high-temperature water in the cold tank 2 is discharged from the water outlet nozzle 8 through the inlet of the second two-position three-way valve 6 and the first outlet thereof and the fourth check valve 21. Thus, not only the high-temperature sterilization of the cold tank 2 is realized, but also the high-temperature sterilization of the cold water outlet pipeline 10 is also realized. The arrow direction in fig. 2 indicates the flow direction of hot water during the high temperature sterilization.

When the instant heater 3 is heated for about 360 hours, a descaling button on the machine body can be pressed to realize one-key automatic descaling, the accumulated heating time of the instant heater 3 can be measured through a timing unit, when the preset accumulated heating time (for example, 360 hours) is reached, the timing unit sends a signal to a control unit, the control unit controls the first water pump 14 to start, as shown in fig. 3, the first water pump 14 pumps acid water in the acid water storage tank 4 into the instant heater 3 to heat, the instant heater 3 starts to heat the acid water to 95 ℃, after the acid water stays in the instant heater 3 for ten minutes, when the timing unit measures the acid water to keep in the instant heater 3 for ten minutes, the control unit sends a signal, the control unit controls the third water pump 16 to start, the acid water in the instant heater 3 is conveyed to the water outlet nozzle 8 through the inlet and the second outlet of the first two-position three-way valve 5, and the third check valve 20 is started, and the heating efficiency can be maintained after the descaling of the instant heater 3. The direction of the arrow in fig. 3 indicates the flow direction of the acid water during the descaling process.

The above description is intended to be illustrative and not limiting, and variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art within the scope of the present disclosure. Also, the above examples (or one or more aspects thereof) may be used in combination with each other, and it is contemplated that the embodiments may be combined with each other in various combinations or permutations.

Claims (10)

1. An anti-scaling and high-temperature sterilization waterway system comprises a water tank (1), a cold tank (2) and an instant heater (3), and is characterized by also comprising an acid water storage tank (4), a first two-position three-way valve (5) and a second two-position three-way valve (6);

the water outlet of the water tank (1) is connected with the water inlet of the instant heater (3) through a water supply pipeline (7);

the water outlet of the instant heater (3) is connected with the inlet of the first two-position three-way valve (5), the first outlet of the first two-position three-way valve (5) is connected with the water outlet nozzle (8) through a hot water outlet pipeline (9), and the second outlet of the first two-position three-way valve (5) is connected with the water outlet nozzle (8) through a cold water outlet pipeline (10);

the cold tank (2) is arranged on the cold water outlet pipeline (10);

the second two-position three-way valve (6) is arranged on the cold water outlet pipeline (10) between the cold tank (2) and the water outlet nozzle (8), the inlet of the second two-position three-way valve (6) is communicated with the water outlet of the cold tank (2), the first outlet of the second two-position three-way valve (6) is communicated with the water outlet nozzle (8), and the second outlet of the second two-position three-way valve (6) is connected to the water supply pipeline (7) through a water return pipeline (11);

the water outlet of the acid water storage tank (4) is connected to the water supply pipeline (7) through the acid water supply pipeline (12).

2. The anti-scaling and high-temperature sterilization waterway system according to claim 1, characterized in that the acid water supply pipeline (12) is provided with a first water suction pump (14) and a first check valve (18), and the first water suction pump (14) is positioned upstream of the first check valve (18) in the flow direction of the acid water.

3. The scale-preventing and high-temperature sterilizing waterway system according to claim 1, wherein the water supply pipeline (7) is sequentially provided with a second water suction pump (15), a filter (13) and a second check valve (19) along the water flow direction.

4. An anti-scaling and high-temperature sterilization waterway system according to claim 3, characterized in that, in the water flow direction of the water supply line (7), the junction of the water supply line (12) and the water supply line (7) is located downstream of the second check valve (19) and close to the instant heater (3), and the junction of the return line (11) and the water supply line (7) is located downstream of the junction of the water supply line (12) and the water supply line (7) and close to the instant heater (3).

5. The anti-scaling and high-temperature sterilization waterway system according to claim 1, characterized in that the instant heater (3) is a thick film heater.

6. The anti-scaling and high-temperature sterilization waterway system according to claim 1, characterized in that a third water pump (16) and a third check valve (20) are provided on the hot water outlet pipeline (9), the third water pump (16) being located upstream of the third check valve (20) in the flow direction of the hot water.

7. A water dispenser comprising a body, further comprising the anti-scaling and high temperature sterilization waterway system of any one of claims 1 to 6.

8. The water dispenser according to claim 7, wherein a sterilization operation part is arranged on the machine body, a control unit is arranged in the machine body, and the control unit is respectively connected with the sterilization operation part, a first two-position three-way valve (5), a second two-position three-way valve (6), an instant heater (3) and a fourth water suction pump (17) on the cold water outlet pipeline (10);

the sterilization operation part responds to the operation of a user and sends a first signal to the control unit;

the control unit is used for controlling the instant heater (3) and the fourth water pump (17) to start when receiving the first signal, controlling the opening of a passage between the inlet of the first two-position three-way valve (5) and the second outlet of the first two-position three-way valve, opening the passage between the inlet of the second two-position three-way valve (6) and the second outlet of the second two-position three-way valve, and conveying water in the cold tank (2) to the instant heater (3) for heating and returning to the cold tank (2) by the fourth water pump (17).

9. The water dispenser according to claim 8, wherein a temperature sensor is arranged in the cold tank (2), a timing unit is also arranged in the machine body, and the control unit is respectively connected with the temperature sensor and the timing unit;

the temperature sensor is used for detecting the temperature of water in the cold tank (2) and sending a second signal to the control unit when the water temperature in the cold tank (2) reaches a first temperature threshold value, and the control unit is also used for controlling the fourth water suction pump (17) to be closed and controlling the second two-position three-way valve (6) to be closed when receiving the second signal;

the timing unit is used for measuring the time when the water temperature in the cold tank (2) reaches the first temperature threshold value, sending a third signal to the control unit when the time measured by the timing unit reaches the first time threshold value, and controlling the fourth water suction pump (17) to be started when the third signal is received, and controlling a passage between the inlet of the second two-position three-way valve (6) and the first outlet of the second two-position three-way valve (6) to be opened so as to send hot water in the cold tank (2) to the water outlet nozzle (8) for discharging.

10. The water dispenser according to claim 9, characterized in that the timing unit is further configured to measure a usage time period of the instant heater (3), and when the usage time period measured by the timing unit reaches a second time threshold, send a fourth signal to the control unit, and when the fourth signal is received, the control unit is further configured to control the first water pump (14) and the instant heater (3) on the acid water supply pipeline (12) to be started, and control a passage between an inlet of the first two-position three-way valve (5) and a first outlet thereof to be opened, so as to convey acid water in the acid water storage tank (4) to the instant heater (3) for descaling;

the timing unit is further used for measuring the time after the acid water enters the instant heater (3), sending a fifth signal to the control unit when the time after the acid water enters the instant heater (3) and measured by the timing unit reaches a third time threshold, and controlling a third water suction pump (16) on the hot water outlet pipeline (9) to be started when the fifth signal is received, so that the acid water after descaling in the instant heater (3) is discharged through the hot water outlet pipeline (9) and the water outlet nozzle (8).