Cold boiled water dispenser, constant-temperature control method and high-temperature sterilization method

Abstract

The invention relates to the technical field of water dispensers, and discloses a cold boiled water dispenser, a constant temperature control method and a high temperature sterilization method.The cold boiled water dispenser comprises a heating water tank, a heat exchange module, a control module and a first water inlet valve, and a heating inlet, a boiled water outlet and an exhaust port are formed in the heating water tank; two ends of the first water inlet valve are respectively communicated with an external water source and the heating inlet; the boiled water outlet is connected with a boiled water control valve; the water heater is characterized by further comprising a second water inlet valve and a constant-temperature water tank, a first high-water-level electrode, a first low-water-level electrode, a first electric heating tube and a first temperature probe are arranged in the constant-temperature water tank, a cold water inlet and a constant-temperature outlet are formed in the constant-temperature water tank, and a cold water inlet and a cold water outlet are formed in the heat exchange module. Two ends of the second water inlet valve are respectively communicated with an external water source and the cold water inlet, the cold boiled water outlet is communicated with the cold boiled water inlet, and the constant-temperature outlet is connected with a cold boiled water control valve; the cold boiled water dispenser has a constant-temperature water outlet effect and a high-temperature sterilization effect.

Description

Technical Field

[0001] The invention relates to the technical field of water dispensers, and in particular to a boiled water dispenser, a constant temperature control method and a high-temperature sterilization method. Background Art

[0002] The existing boiled water dispenser, see Chinese utility model application number: 2023225654413, name: boiled water dispenser, authorization announcement date: May 10, 2024, includes a heat exchanger, a heating water tank, a water outlet pump and a boiled water control valve, the heat exchanger includes a cold water inlet, a hot water outlet, a boiling water inlet and a boiled water outlet, the boiling water inlet and the hot water outlet are respectively connected to the heating water tank, the water outlet pump is connected between the boiled water outlet and the boiled water control valve, the heating water tank is connected to the atmosphere, and is characterized in that: it also includes a storage water tank, a first water inlet pump and a control module, the first water inlet pump is connected between the cold water inlet and the storage water tank, the first water inlet pump, the water outlet pump and the boiled water control valve are respectively electrically connected to the control module, and the water inlet flow rate Q1 of the first water inlet pump is less than or equal to the water outlet flow rate Q2 of the water outlet pump; this boiled water dispenser provides a boiled water dispenser that can both achieve zero pressure inside the heating water tank and prevent overflow of the heating water tank.

[0003] However, the boiled water dispenser with the above structure still has the following shortcomings: (1) The temperature of the boiled water discharged through the boiled water outlet is affected by the temperature of the boiled water discharged from the heating water tank and the temperature of the cold water entering the heat exchanger from the outside, resulting in the temperature of the boiled water discharged at different times being variable. It is impossible to achieve a constant temperature and cannot meet the user's more usage needs; (2) Furthermore, since the temperature of the boiled water is not high, it cannot have a sterilization effect. After long-term use, the boiled water outlet pipe and the boiled water faucet are prone to breed bacteria, affecting the user's drinking water safety. Summary of the invention

[0004] The purpose of the present invention is to solve the deficiencies of the above-mentioned prior art and to provide a boiled water dispenser which is equipped with a constant temperature water tank and can achieve constant temperature water output and high temperature sterilization effects.

[0005] The second object of the present invention is to provide a constant temperature control method that can achieve a constant temperature water output effect.

[0006] The third object of the present invention is to provide a high temperature sterilization method that can achieve high temperature sterilization effect.

[0007] The first object of the present invention is achieved by: A boiled water dispenser comprises a heating water tank, a heat exchange module, a control module and a first water inlet valve, wherein the heating water tank is provided with a heating inlet, a boiled water outlet and an exhaust port, the two ends of the first water inlet valve are respectively connected to an external water source and the heating inlet, and the boiled water outlet is connected to a boiled water control valve; the feature is that it also comprises a second water inlet valve and a constant temperature water tank, wherein the constant temperature water tank is provided with a first high water level electrode, a first low water level electrode, a first electric heating pipe and a first temperature probe, the constant temperature water tank is provided with a boiled water inlet and a constant temperature outlet, the heat exchange module is provided with a cold water inlet and a boiled water outlet, the two ends of the second water inlet valve are respectively connected to an external water source and a cold water inlet, the boiled water outlet is connected to the boiled water inlet, the constant temperature outlet is connected to the boiled water control valve, and the control module is respectively electrically connected to the first high water level electrode, the first low water level electrode, the heating water tank, the first water inlet valve, the second water inlet valve, the first electric heating pipe, the first temperature probe, the boiled water control valve and the boiled water control valve.

[0008] The purpose of the present invention can also be solved by the following technical measures: Specifically, the heat exchange module includes a first heat exchange part and a second heat exchange part, both ends of the second heat exchange part are connected to the first heat exchange part, the first heat exchange part has the cold water inlet and the boiled water outlet at both ends respectively, and a part of the second heat exchange part extends into the heating water tank.

[0009] Specifically, the first heat exchange part is a spirally extended heat exchange tube group, which is sleeved on the outer periphery of the heating water tank. The heat exchange tube group includes an outer heat exchange tube and an inner heat exchange tube. The inner heat exchange tube is arranged in the tube cavity of the outer heat exchange tube. The cold water inlet is arranged at one end of the outer heat exchange tube, and the other end of the outer heat exchange tube is connected to the second heat exchange part. One end of the second heat exchange part is connected to the inner heat exchange tube respectively, and the boiled water outlet is opened at one end of the inner heat exchange tube.

[0010] Specifically, the second heat exchange part is a coiled and extended heat exchange tube, both ends of which extend out of the heating water tank and are connected to the other end of the heat exchange outer tube and the heat exchange inner tube. A second temperature probe is provided on one end of the heat exchange tube connected to the heat exchange inner tube.

[0011] Specifically, a second high water level electrode, a second low water level electrode, a second electric heating tube and a third temperature probe are provided in the heating water tank, and the second electric heating tube and the third temperature probe are both located below the second heat exchange portion extending into the heating water tank, the lowest end of the second low water level electrode is located above the second heat exchange portion extending into the heating water tank, and the lowest end of the second low water level electrode is lower than the boiling water outlet, and the second high water level electrode, the second low water level electrode, the second electric heating tube and the third temperature probe are all electrically connected to the control module.

[0012] Specifically, a one-way valve is further included, two ends of which are respectively connected to the second water inlet valve and the cold water inlet, and the one-way valve is electrically connected to the control module.

[0013] Specifically, it further includes a flow control valve, wherein two ends of the flow control valve are respectively connected to the cold boiled water outlet and the cold boiled water inlet, and the flow control valve is electrically connected to the control module.

[0014] The second object of the present invention is achieved by: A constant temperature control method, using the above-mentioned boiled water dispenser, is characterized in that it comprises the following steps: 1. When the water level in the constant temperature water tank reaches the first low water level electrode, a constant temperature T is set to the control module, and the real-time temperature detected by the first temperature probe in the constant temperature water tank is T1; 2. When T1≤T-1℃, the control module controls the first electric heating tube to be energized for heating; 3. When T1≥T-1℃, the control module controls the first electric heating tube to stop heating; 4. When the water level in the constant temperature water tank is lower than the first low water level electrode, the control module controls the first electric heating tube to cut off power.

[0015] Specifically, during the operation of the second water inlet valve and the heating water tank and the process of the heat exchange module replenishing water to the constant temperature water tank, when the water level in the constant temperature water tank is higher than the first high water level electrode, the control module controls the second water inlet valve to stop operating.

[0016] The third object of the present invention is achieved by: A high temperature sterilization method, using the above-mentioned boiled water dispenser, is characterized in that it comprises the following steps: 1. The control module issues a high-temperature sterilization instruction; 2. When the water level in the constant temperature water tank reaches the first low water level electrode, the control module starts the first electric heating tube to energize and heat, and the real-time temperature detected by the first temperature probe in the constant temperature water tank is T1; 3. When the water temperature in the constant temperature water tank is heated to 80℃≤T1≤85℃, keep the first electric heating tube working for 2 minutes, and then turn off the first electric heating tube; 4. Open the boiled water control valve to allow the hot water in the constant temperature water tank to perform high-temperature disinfection on the outlet pipe and outlet of the boiled water control valve. When the water level in the constant temperature water tank is lower than the first low water level electrode, close the boiled water control valve after 1 minute and the disinfection is completed.

[0017] The beneficial effects of the present invention are as follows: This boiled water dispenser is equipped with a second water inlet valve and a constant temperature water tank. The first electric heating tube can heat the water in the constant temperature water tank to a constant temperature set by the user, so that the outlet temperature of the boiled water control valve is constant, and the water in the constant temperature water tank is prevented from lowering in temperature and becoming cold due to being stored for a long time, thereby meeting more user needs. At the same time, the constant temperature water tank has a large water storage capacity, so that the water outlet of the boiled water control valve is stable. Furthermore, the first electric heating tube can heat the water in the constant temperature water tank to a higher temperature, thereby achieving high-temperature disinfection of the outlet pipe of the boiled water control valve and the boiled water outlet, to ensure drinking hygiene.

[0018] The external heat of the heating water tank can have a certain preheating effect on the cold water in the outer heat exchange tube, which is beneficial to improving the heat exchange efficiency. At the same time, the heat exchange effect of the second heat exchange part extending into the heating water tank is high, which is beneficial to the rapid heating of the preheated cold water into hot water. The heated hot water then enters the inner heat exchange tube for heat exchange and cooling, thereby becoming boiled water and flowing to the constant temperature water tank. The implementation effect is good.

[0019] The flow control valve controls the water flow from the cold water outlet to the constant temperature water tank, which is beneficial to controlling the water heat exchange effect in the heat exchange module and the stability of the subsequent constant temperature water tank temperature control. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the boiled water dispenser of the present invention.

[0021] Figure 2 It is a schematic diagram of the electrical part of the boiled water dispenser of the present invention. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Embodiment 1, combined with Figure 1 to Figure 2 As shown, a boiled water dispenser comprises a heating water tank 1, a heat exchange module 2, a control module 3 and a first water inlet valve 4. The heating water tank 1 is provided with a heating inlet 11, a boiling water outlet 12 and an exhaust port 18. Both ends of the first water inlet valve 4 are respectively connected to an external water source and the heating inlet 11. The boiling water outlet 12 is connected to a boiling water control valve 121. The invention is characterized in that it also includes a second water inlet valve 5 and a constant temperature water tank 6, wherein the constant temperature water tank 6 is provided with a first high water level electrode 61, a first low water level electrode 62, a first electric heating tube 63 and a first temperature probe 64, the constant temperature water tank 6 is provided with a cold water inlet 65 and a constant temperature outlet 66, the heat exchange module 2 is provided with a cold water inlet 21 and a cold water outlet 22, the two ends of the second water inlet valve 5 are respectively connected to an external water source and the cold water inlet 21, and the cold water outlet 22 is connected to the cold water outlet 22. The inlet 65 is connected, and the constant temperature outlet 66 is connected to the boiled water control valve 661. The control module 3 is electrically connected to the first high water level electrode 61, the first low water level electrode 62, the heating water tank 1, the first water inlet valve 4, the second water inlet valve 5, the first electric heating tube 63, the first temperature probe 64, the boiling water control valve 121 and the boiled water control valve 661 respectively; more specifically, the water levels of the first temperature probe 64, the first electric heating tube 63 and the constant temperature outlet 66 are all lower than the first low water level electrode 62.

[0023] This boiled water dispenser, by adding a second water inlet valve 5 and a constant temperature water tank 6, the first electric heating tube 63 can heat the water temperature in the constant temperature water tank 6 to a constant temperature set by the user, so that the outlet water temperature of the boiled water control valve 661 is constant, and the water in the constant temperature water tank 6 is prevented from lowering in temperature and becoming cold water due to being placed for a long time, which can meet more user needs. At the same time, the constant temperature water tank 6 has a large water storage capacity, so that the water outlet of the boiled water control valve 661 is stable. Furthermore, the first electric heating tube 63 can heat the water temperature in the constant temperature water tank 6 to a higher temperature, thereby realizing high-temperature disinfection of the boiled water control valve 661 to ensure drinking hygiene.

[0024] In this embodiment, the external water source can be tap water transported by an external water pipe. Its own water pressure has a certain transport power, which can stably transport the tap water to the heat exchange module 2 or the heating water tank 1 to perform corresponding work. Therefore, there is no need to add components such as water pumps, thereby reducing the overall manufacturing cost of the product.

[0025] As a specific solution, the heat exchange module 2 includes a first heat exchange part 23 and a second heat exchange part 24, both ends of the second heat exchange part 24 are connected to the first heat exchange part 23, the first heat exchange part 23 has the cold water inlet 21 and the boiled water outlet 22 at both ends, and a part of the second heat exchange part 24 extends into the heating water tank 1; so that the external water flowing in from the second water inlet valve 5 first enters the first heat exchange part 23 for primary heat exchange, and then enters the second heat exchange part 24 for secondary heat exchange, and finally flows to the constant temperature water tank 6 via the first heat exchange part 23, and the implementation effect is better.

[0026] In this embodiment, the first heat exchange part 23 is a spirally extended heat exchange tube group, which is sleeved on the outer periphery of the heating water tank 1. The heat exchange tube group includes a heat exchange outer tube 231 and a heat exchange inner tube 232. The heat exchange inner tube 232 is arranged in the tube cavity of the heat exchange outer tube 231. The cold water inlet 21 is arranged at one end of the heat exchange outer tube 231. The other end of the heat exchange outer tube 231 is connected to the second heat exchange part 24. One end of the second heat exchange part 24 is connected to the heat exchange inner tube 232. The inner tube 232 has the boiled water outlet 22 at one end; the external heat of the heating water tank 1 can preheat the cold water in the heat exchange outer tube 231 to a certain extent, which is beneficial to improving the heat exchange efficiency. At the same time, the second heat exchange part 24 extending into the heating water tank 1 has a high heat exchange effect, which is beneficial to the rapid heating of the preheated cold water into hot water, and then the heated hot water enters the heat exchange inner tube 232 for heat exchange and cooling, thereby becoming boiled water and flowing to the constant temperature water tank 6. The implementation effect is good.

[0027] The heat exchange outer tube 231 and the heat exchange inner tube 232 can be copper tubes or stainless steel tubes. Copper tubes or stainless steel tubes have good heat exchange performance and can achieve good heat exchange effect.

[0028] In this embodiment, the second heat exchange part 24 is a coiled and extended heat exchange tube, both ends of which extend out of the heating water tank 1 and are connected with the other end of the heat exchange outer tube 231 and the heat exchange inner tube 232, and a second temperature probe 7 is provided on the end of the heat exchange tube connected with the heat exchange inner tube 232; the coiled and extended heat exchange tube can be a copper tube or a stainless steel tube, the second heat exchange part 24 has a simple structure and is easy to implement, and the second temperature probe 7 can measure the temperature of the hot water after it is rapidly heated by the second heat exchange part 24.

[0029] As a more specific solution, the heating water tank 1 is provided with a second high water level electrode 13, a second low water level electrode 14, a second electric heating tube 15 and a third temperature probe 16, and the second electric heating tube 15 and the third temperature probe 16 are both located below the second heat exchange portion 24 extending into the heating water tank 1, the lowest end of the second low water level electrode 14 is located above the second heat exchange portion 24 extending into the heating water tank 1, and the lowest end of the second low water level electrode 14 is lower than the boiling water outlet 12, and the second high water level electrode 13, the second low water level electrode 14, the second electric heating tube 15 and the third temperature probe 16 are both located below the second heat exchange portion 24 extending into the heating water tank 1, and the lowest end of the second low water level electrode 14 is lower than the boiling water outlet 12. The second low water level electrode 14, the second electric heating tube 15 and the third temperature probe 16 are all electrically connected to the control module 3; a limit water level electrode 17 is also provided in the heating water tank to prevent water in the heating water tank from overflowing; so that the control module 3 can realize water inlet control and heating control of the heating water tank 1 through the second high water level electrode 13, the second low water level electrode 14, the second electric heating tube 15 and the third temperature probe 16, so as to meet the diverse usage requirements of users and also facilitate the stable operation of the subsequent heat exchange module 2 and the constant temperature water tank 6.

[0030] As a more preferred embodiment, a one-way valve 8 is also included, and the two ends of the one-way valve 8 are respectively connected to the second water inlet valve 5 and the cold water inlet 21, and the one-way valve 8 is electrically connected to the control module 3; so that external water can only flow from the second water inlet valve 5 to the cold water inlet 21 of the heat exchange module 2, and the water in the heat exchange module 2 is prevented from flowing back to the second water inlet valve 5.

[0031] As a more preferred embodiment, it also includes a flow control valve 9, the two ends of which are respectively connected to the boiled water outlet 22 and the boiled water inlet 65, and the flow control valve 9 is electrically connected to the control module 3; the flow control valve 9 controls the water flow flowing from the boiled water outlet 22 to the constant temperature water tank 6, which is beneficial to controlling the water heat exchange effect in the heat exchange module 2, and is also beneficial to the stability of the subsequent temperature control of the constant temperature water tank 6.

[0032] More specifically, one end of the flow control valve 9 is connected to a pipeline 100, and the pipeline 100 passes through the boiled water inlet 65 and extends into the inner bottom of the thermostatic water tank 6. An anti-siphon air vent 200 is provided on the upper portion of the portion of the pipeline 100 extending into the thermostatic water tank 6. An exhaust port 300 is also provided on the upper portion of the thermostatic water tank; the exhaust port 300 can discharge the high-temperature and high-pressure steam in the thermostatic water tank 6 to avoid excessive pressure in the thermostatic water tank 6; the anti-siphon air vent 200 can make the air pressure in the pipeline 100 consistent with the air pressure in the thermostatic water tank 6 to avoid siphoning and backflow in the pipeline 100.

[0033] More specifically, the boiled water control valve 661 includes a water outlet pipeline 662 , a boiled water solenoid valve 663 arranged on the water outlet pipeline 662 , and a boiled water outlet 664 arranged at one end of the water outlet pipeline 662 .

[0034] The boiled water outlet 12 of this boiled water dispenser can deliver boiled water at nearly 100°C, which is used to meet the needs of users who need high-temperature boiled water for brewing tea bags, medicine powders, etc.; and the boiled water outlet 664 can deliver warm boiled water above 35°C, which is used to meet the needs of users who drink boiled water, etc., that is, the constant temperature water tank 6 of this product is suitable for users who need to drink boiled water above 35°C.

[0035] Moreover, the pipeline for discharging boiled water and the pipeline for discharging boiled water are independent of each other, which is conducive to the stable functioning of both. Therefore, the water in the second heat exchange part 24 only needs to reach the boiling water temperature specified in the national standard (the boiling water temperature in the national standard is 92°C) to flow into the heat exchange inner tube 232 of the first heat exchange part 23 for heat exchange and cooling, which can also avoid the boiled water temperature after heat exchange being too high to a certain extent.

[0036] A constant temperature control method, using the boiled water dispenser according to the first embodiment, is characterized in that it comprises the following steps: 1. When the water level in the thermostatic water tank 6 reaches the first low water level electrode 62, the control module 3 is set to a constant temperature T, and the real-time temperature detected by the first temperature probe 64 in the thermostatic water tank 6 is T1; 2. When T1≤T-1°C, the control module 3 controls the first electric heating tube 63 to be energized for heating; 3. When T1≥T-1°C, the control module 3 controls the first electric heating tube 63 to stop heating; Fourth, when the water level in the constant temperature water tank 6 is lower than the first low water level electrode 62, the control module 3 controls the first electric heating tube 63 to be powered off.

[0037] With this constant temperature control method, the first electric heating tube 63 can heat the water temperature in the constant temperature water tank 6 to a constant temperature set by the user, so that the outlet water temperature of the boiled water control valve 661 is constant, meeting more user requirements. At the same time, it can also effectively prevent the first electric heating tube 63 from drying out due to insufficient water in the constant temperature water tank 6, and has high safety in use.

[0038] As a more specific solution, during the operation of the second water inlet valve 5 and the heating water tank 1, and the heat exchange module 2 replenishing water to the constant temperature water tank 6, when the water level in the constant temperature water tank 6 is higher than the first high water level electrode 61, the control module 3 controls the second water inlet valve 5 to stop working; thereby effectively preventing the water level in the constant temperature water tank 6 from being too high, thereby causing water to overflow from the constant temperature water tank 6.

[0039] More specifically, the temperature detected by the second temperature probe 7 is T2, and the temperature detected by the third temperature probe 16 is T3. When boiled water is needed, the following conditions must be met: T3 ≥ 94°C, T2 ≥ 92°C. Only then can the control module 3 control the second water inlet valve 5 to start working, so that the heat exchange module 2 can replenish the boiled water after heat exchange to the constant temperature water tank 6; the boiling water temperature in the national standard is 92°C. Through the above-mentioned restrictions, the boiled water entering the constant temperature water tank is obtained by cooling down the boiled water, thus ensuring drinking hygiene.

[0040] A high temperature sterilization method, using the boiled water dispenser according to the first embodiment, is characterized in that it comprises the following steps: 1. Control module 3 issues a high temperature sterilization instruction; 2. When the water level in the thermostatic water tank 6 reaches the first low water level electrode 62, the control module 3 starts the first electric heating tube 63 to energize and heat, and the real-time temperature detected by the first temperature probe 64 in the thermostatic water tank 6 is T1; 3. When the water temperature in the constant temperature water tank 6 is heated to 80°C ≤ T1 ≤ 85°C, the first electric heating tube 63 is kept working for 2 minutes, and then the first electric heating tube 63 is turned off; 4. Open the boiled water control valve 661, so that the hot water in the constant temperature water tank 6 can perform high-temperature disinfection on the water outlet pipe 662 and the boiled water outlet 664 of the boiled water control valve 661. When the water level in the constant temperature water tank 6 is lower than the first low water level electrode 62, close the boiled water control valve 661 after 1 minute, and the disinfection is completed.

[0041] In this high-temperature sterilization method, the first electric heating tube 63 can heat the water temperature in the constant temperature water tank 6 to a higher temperature, thereby achieving high-temperature disinfection of the water outlet pipe 662 of the boiled water control valve 661 and the boiled water outlet 664 to ensure drinking hygiene; at the same time, it can also effectively avoid the occurrence of dry burning.

[0042] During high-temperature sterilization, in order not to affect the user's normal drinking of boiled water, the high-temperature sterilization instruction can be set as an intelligent automatic instruction, that is, the control module 3 will only issue a high-temperature sterilization instruction during the user's rest period (such as at night or in the early morning).

[0043] The terms first, second, etc. used in the present invention do not indicate any order, quantity or importance, but are only used for distinction.

[0044] As used in the present invention, the terms "one", "a", etc. do not indicate a limit on quantity, but indicate the existence of at least one of the mentioned objects. As used in the present invention, the terms "top", "bottom", "side", "longitudinal", "lateral", "middle", "center", "outside", "inside", "horizontal", "vertical", "left", "right", "upper", "lower", etc." indicate relative positions, not absolute positions.

[0045] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A boiled water dispenser, comprising a heating water tank (1), a heat exchange module (2), a control module (3) and a first water inlet valve (4), wherein the heating water tank (1) is provided with a heating inlet (11), a boiling water outlet (12) and an exhaust port (18), two ends of the first water inlet valve (4) are respectively connected to an external water source and the heating inlet (11), and the boiling water outlet (12) is connected to a boiling water control valve (121); Its characteristics are: The invention also comprises a second water inlet valve (5) and a constant temperature water tank (6), wherein the constant temperature water tank (6) is provided with a first high water level electrode (61), a first low water level electrode (62), a first electric heating tube (63) and a first temperature probe (64), the constant temperature water tank (6) is provided with a boiled water inlet (65) and a constant temperature outlet (66), the heat exchange module (2) is provided with a cold water inlet (21) and a boiled water outlet (22), and the two ends of the second water inlet valve (5) are respectively connected to an external water source and a cold water inlet. The constant temperature outlet (66) is connected to a first high water level electrode (61), a first low water level electrode (62), a heating water tank (1), a first water inlet valve (4), a second water inlet valve (5), a first electric heating pipe (63), a first temperature probe (64), a boiling water control valve (121) and a cold boiled water control valve (661).

2. The boiled water dispenser according to claim 1, characterized in that: The heat exchange module (2) comprises a first heat exchange portion (23) and a second heat exchange portion (24), both ends of the second heat exchange portion (24) being connected to the first heat exchange portion (23), the first heat exchange portion (23) having the cold water inlet (21) and the boiled water outlet (22) at both ends respectively, and a portion of the second heat exchange portion (24) extending into the heating water tank (1).

3. The boiled water dispenser according to claim 2, characterized in that: The first heat exchange part (23) is a spirally extended heat exchange tube group, which is sleeved on the outer periphery of the heating water tank (1). The heat exchange tube group includes an outer heat exchange tube (231) and an inner heat exchange tube (232). The inner heat exchange tube (232) is arranged in the tube cavity of the outer heat exchange tube (231). One end of the outer heat exchange tube (231) is provided with the cold water inlet (21). The other end of the outer heat exchange tube (231) is connected to the second heat exchange part (24). One end of the second heat exchange part (24) is respectively connected to the inner heat exchange tube (232). One end of the inner heat exchange tube (232) is provided with the cold water outlet (22).

4. The boiled water dispenser according to claim 3, characterized in that: The second heat exchange portion (24) is a coiled and extended heat exchange tube, with both ends of the heat exchange tube extending out of the heating water tank (1) and communicating with the other end of the heat exchange outer tube (231) and the heat exchange inner tube (232), and a second temperature probe (7) is provided on one end of the heat exchange tube that is in communication with the heat exchange inner tube (232).

5. The boiled water dispenser according to claim 4, characterized in that: The heating water tank (1) is provided with a second high water level electrode (13), a second low water level electrode (14), a second electric heating tube (15) and a third temperature probe (16), and the second electric heating tube (15) and the third temperature probe (16) are both located below a second heat exchange portion (24) extending into the heating water tank (1), the lowest end of the second low water level electrode (14) is located above the second heat exchange portion (24) extending into the heating water tank (1), and the lowest end of the second low water level electrode (14) is lower than the boiling water outlet (12), and the second high water level electrode (13), the second low water level electrode (14), the second electric heating tube (15) and the third temperature probe (16) are all electrically connected to the control module (3).

6. The boiled water dispenser according to claim 1, characterized in that: It also includes a one-way valve (8), the two ends of which are respectively connected to the second water inlet valve (5) and the cold water inlet (21), and the one-way valve (8) is electrically connected to the control module (3).

7. The boiled water dispenser according to claim 1, characterized in that: It also includes a flow control valve (9), the two ends of the flow control valve (9) are respectively connected to the cold boiled water outlet (22) and the cold boiled water inlet (65), and the flow control valve (9) is electrically connected to the control module (3).

8. A constant temperature control method, using the boiled water dispenser according to any one of claims 1 to 7, characterized in that: It includes the following steps, 1. When the water level in the constant temperature water tank (6) reaches the first low water level electrode (62), a constant temperature T is set to the control module (3), and the real-time temperature detected by the first temperature probe (64) in the constant temperature water tank (6) is T1; 2. When T1≤T-1°C, the control module (3) controls the first electric heating tube (63) to be energized for heating; 3. When T1 ≥ T-1°C, the control module (3) controls the first electric heating tube (63) to stop heating; Fourth, when the water level in the constant temperature water tank (6) is lower than the first low water level electrode (62), the control module (3) controls the first electric heating tube (63) to be powered off.

9. The constant temperature control method according to claim 8, characterized in that: During the operation of the second water inlet valve (5) and the heating water tank (1), and the process of the heat exchange module (2) replenishing water to the constant temperature water tank (6), when the water level in the constant temperature water tank (6) is higher than the first high water level electrode (61), the control module (3) controls the second water inlet valve (5) to stop operating.

10. A high temperature sterilization method, using the boiled water dispenser according to any one of claims 1 to 7, characterized in that: It includes the following steps, 1. The control module (3) issues a high temperature sterilization instruction; 2. When the water level in the constant temperature water tank (6) reaches the first low water level electrode (62), the control module (3) starts the first electric heating tube (63) to energize and heat, and the real-time temperature detected by the first temperature probe (64) in the constant temperature water tank (6) is T1; 3. When the water temperature in the constant temperature water tank (6) is heated to 80°C ≤ T1 ≤ 85°C, the first electric heating tube (63) is kept working for 2 minutes, and then the first electric heating tube (63) is turned off; Fourth, the boiled water control valve (661) is opened, so that the hot water in the constant temperature water tank (6) performs high temperature disinfection on the water outlet pipe (662) and the boiled water outlet (664) of the boiled water control valve (661). When the water level in the constant temperature water tank (6) is lower than the first low water level electrode (62), the boiled water control valve (661) is closed after 1 minute, and the disinfection is completed.

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