TWI411754B - Distilled drinking fountain - Google Patents

Abstract

A vaporizer includes a liquid supplier, a thermal exchange tube, a heating tank, a vapor tube, a cooling unit, a container, an energy-saving heating unit and a valve. One end of the thermal exchange tube is connected with the liquid supplier, the other end of the thermal exchange tube is connected with the heating tank. One end of the vapor tube is connected with the heating tank, the other end of the vapor tube is connected with one end of the cooling unit, and the other end of the cooling tube is connected with the valve through the container and the energy-saving heating unit in turn. Since one part of vapor tube is received in the thermal exchange tube, with the other part of the vapor tube is received in the energy-saving heating unit, the vapor in the vapor tube can heat the liquid passing through the thermal exchange tube and the energy-saving heating unit, and the waste of the energy can be reduced.

Description

Distilled drinking fountain

The present invention relates to a distilled drinking water device, and more particularly to a distilled drinking water device capable of effectively saving energy.

In general, the drinking water device can be mainly divided into two types: distillation type and boiling type; wherein the distillation type mainly heats a liquid to a predetermined temperature, and the various boiling points in the liquid have different boiling point characteristics, so that the boiling point of the liquid The substance below the predetermined temperature is first evaporated and guided to be collected in a container, and the substance having a boiling point higher than the predetermined temperature in the liquid remains in the original heating container, thereby different substances having different boiling points. Separate to achieve the purpose of purifying the liquid.

The conventional distilled water drinking device mainly comprises a heating container, a condensing tube and a water collecting container, the heating container has a cylindrical body and a heating unit, and the inside of the cylindrical body has an accommodating space, and the accommodating space Storing a liquid; the heating unit is disposed in the accommodating space for heating the liquid in the accommodating space; one end of the condensing tube is connected to the accommodating space through a first pipeline, and the other end is And communicating with a liquid storage space of one of the water collecting containers through a second pipeline.

When the conventional distilled water drinking device distills the liquid, the heating unit is used to heat the liquid in the accommodating space to a boiling temperature, and the boiling temperature is preferably slightly higher than the boiling point of water by 100 ° C. The moisture in the liquid is vaporized into water vapor and enters the condensation tube through the first line; when the water vapor is in contact with the condensation tube, the temperature of the condensation tube Relatively lower than the temperature of the water vapor, so that the water vapor gradually condenses into liquid water molecules during the heat exchange, and flows along the second pipeline to the liquid storage space of the water collecting container, This achieves the purpose of extracting distilled drinking water. Moreover, when it is desired to drink warm distilled drinking water, the distilled drinking water can be heated to a suitable temperature by a uniform heat unit, and then output for drinking.

However, the conventional distilled water drinking device mainly uses the heat generating unit to directly heat the distilled drinking water, since the temperature of the distilled drinking water is usually close to a normal temperature, between the normal temperature distilled drinking water and the appropriate temperature. In the case of a large temperature difference, the energy consumed by the heat generating unit during heating is so great that energy cannot be effectively saved.

For the above reasons, it is indeed necessary to further improve the above-described conventional distilled water drinking device.

The invention provides a distilled water drinking device, which preheats the distilled liquid by preheating the residual heat energy after the raw water in the distillation process, so as to achieve the purpose of saving energy.

The invention provides a distilled water drinking device, which preheats raw water by the heat energy generated in the distillation process, so as to further achieve the purpose of saving energy.

In order to achieve the foregoing object, the technical means and the efficiencies achievable by the technical method include: a distilled water drinking device comprising: a liquid supply unit having a water supply port; and a heat exchange tube , having a liquid inlet end, a liquid outlet end and a heat In the exchange space, the liquid inlet end is in communication with the water supply port, and the liquid inlet end and the liquid outlet end are connected to the heat exchange space; a hot water tank has a body and a heating unit, and the body is provided with a heating a space, the heating space is connected to the liquid discharge end of the heat exchange tube via a pipeline, the heating unit is disposed on the body; a vapor line having a first end and a second end, the first end Connected to the heating space, and a portion of the vapor line is housed in the heat exchange space; a condensation unit having a condensation tube, one end of the condensation tube being in communication with the second end of the vapor line; a liquid collection container having a liquid storage space, the liquid storage space being in communication with the other end of the condensation tube; an energy-saving heating unit having an energy-saving heat exchange tube and a uniform heat element, the energy-saving heat exchange tube being coated on the other In addition to a part of the steam pipeline, the energy-saving heat exchange tube has a water inlet end, a water outlet end and an energy-saving heat exchange space, and the water inlet end is connected to the liquid storage space, and the water inlet end and the water outlet end are combined with the energy saving heat. Exchange space The heating element is disposed on the energy-saving heat exchange tube; and a water outlet valve is connected to the water outlet end of the energy-saving heat exchange tube via a pipeline; wherein a water level control unit is disposed between the heat exchange tube and the hot water tank The water level control unit is respectively connected to the liquid outlet end of the heat exchange tube and the heating space of the hot water tank through different pipelines; and the water level control unit has a tank body and a stopper, and the tank body is provided with a capacity The stop is disposed in the chamber, and the density of the stop is less than the density of the liquid contained in the chamber.

The present invention is characterized in that the heat exchange tube and the energy-saving heating tube are respectively coated on different portions of the vapor line, so that the water exchange with the higher temperature in the vapor line and the heat exchange space and the energy-saving heat exchange space are respectively used. The liquid having a lower internal temperature undergoes heat exchange, thereby increasing the temperature of the liquid, and thus the phase To reduce the temperature difference between the liquid and the boiling temperature or the drinking temperature, the energy saving effect is effectively achieved.

The above and other objects, features, and advantages of the present invention will become more apparent from the aspects of the appended claims. The distilled water drinking device of the preferred embodiment of the present invention comprises a casing 1, a heat exchange tube 2, a water level control unit 3, a hot water tank 4, a vapor line 5, a condensing unit 6, and a liquid collecting unit. a container 7, an energy-saving heating unit 8 and a water outlet valve 9; the heat exchange tube 2, the water level control unit 3, the hot water tank 4, the steam line 5, the condensing unit 6, the liquid collection container 7 and the energy-saving heating unit 8 are all provided The water supply valve 9 is disposed outside the casing 1 and communicates with the energy-saving heating unit 8 via a pipeline.

The housing 1 has an accommodating space 11 for accommodating and positioning the heat exchange tube 2, the water level control unit 3, the hot water tank 4, the steam line 5, and the condensing unit 6. The liquid collection container 7 and the energy-saving heating unit 8. The housing 1 is provided with a liquid supply unit 12, and the liquid supply unit 12 is preferably selected as a raw water bladder; more specifically, the liquid supply unit 12 has a liquid containing space 121 and a water supply port 122. The liquid storage space 121 is configured to store a liquid to be distilled (hereinafter referred to as a liquid); wherein the liquid system can be selected to be added to the liquid containing space 121 by opening a cover plate 123 of the liquid supply unit 12, or alternatively The water supply line T is directly added to the liquid containing space 121. The water supply port 122 is in communication with the liquid containing space 121. The water supply port 122 is preferably disposed at the bottom of the liquid supply unit 2 so that the liquid can smoothly flow out of the liquid containing space 121 through the water supply port 122.

Referring to Figures 1 and 2, the heat exchange tube 2 has a liquid inlet end 21, a liquid outlet end 22, and a heat exchange space 23, and the liquid inlet end 21 and the liquid outlet end 22 are respectively the heat exchange tubes. The two ends of the two ends, and the liquid inlet end 21 and the liquid outlet end 22 are connected to the heat exchange space 23; wherein the liquid inlet end 21 is connected to the water supply port 122 of the liquid supply unit 12 via a pipeline. The liquid discharge end 22 communicates with the water level control unit 3 via another pipeline, thereby allowing the liquid in the liquid storage space 121 to flow to the heat exchange space 23 via the liquid inlet end 21, and then The liquid discharge end 22 flows into the water level control unit 3.

Referring to FIGS. 1 and 3, the water level control unit 3 is disposed between the heat exchange tube 2 and the hot water tank 4. The water level control unit 3 has a tank body 31 and a stopper 32. The body 31 is provided with a chamber 311 for storing the liquid. The water tank 312 is provided with a water inlet 312, a water outlet 313 and a first limiting portion 314. The water inlet 312 and the water outlet 313 are both connected to the chamber 311, and the water inlet 312 is preferably selected. At the top of the tank body 31, and communicating with the liquid outlet end 22 of the heat exchange tube 2 via a pipeline; and the water outlet 313 is preferably disposed at the bottom of the tank body 31, and via another pipeline The hot water tank 4 is connected to each other so that the water level control unit 3 and the hot water tank 4 can have the same liquid level height by the communication tube principle; the first limiting portion 314 is disposed in the tank body 31. The proper location of the wall.

The stopper 32 is disposed in the chamber 311, and the stopper 32 is The density is less than the density of the liquid so that the stop member 32 can move up and down with the level of the liquid in the chamber 311. In more detail, the stopper 32 is provided with a plug portion 321 and a second limiting portion 322. The plug portion 321 is opposite to the water inlet 312 of the slot body 31 for following the stop member 32. Lifting or closing to open or open the water inlet 312; when the liquid level in the hot water tank 4 gradually rises to an upper limit, forcing the stopper 32 to move with the liquid level height in the chamber 311, so that the The plug portion 321 is configured to close the water inlet 312 in alignment, thereby blocking the communication state between the chamber 311 and the heat exchange space 23 to prevent the liquid in the heat exchange space 23 from being continuously injected through the water level control unit 3. In the hot water tank 4, it is possible to prevent the liquid in the hot water tank 4 from overflowing excessively. The second limiting portion 322 is disposed on the outer wall surface of the stopper 32 and is located at the first limiting portion 314. The second limiting portion 322 can be disengaged from the lifting and lowering of the stopping member 32. Or combining the first limiting portion 314; when the second limiting portion 322 is combined with the first limiting portion 314, the bottom of the stopping member 32 and the water outlet 313 have a proper gap. Thereby, the bottom of the stopper 32 is prevented from closing the water outlet 313. Moreover, the pipeline connecting the water outlet 313 and the hot water tank 4 is preferably optionally provided with a check valve V for preventing the liquid entering the hot water tank 4 from flowing back to the tank body. 31 inside the chamber 311.

The first limiting portion 314 and the second limiting portion 322 of the embodiment are respectively selected as one shoulder portion of the groove body 31 and the stopper member 32, but the implementation of the present invention is not limited thereto. The first limiting portion 314 and the second limiting portion 322 may also be selected as other types of limiting structures.

Referring to FIG. 1 again, the hot water tank 4 has a body 41 and A heating unit 42 is disposed in the body 41. The heating space 411 is in communication with the chamber 311 via a pipeline for storing the liquid input from the water level control unit 3. The heating unit 42 is disposed on the body 41 and is preferably received in the heating space 411 to directly heat the liquid in the heating space 411. The heating unit 42 is preferably selected to be a heating device such as an electric heating tube or a heating wafer.

Referring to FIGS. 1 and 2, the opposite ends of the vapor line 5 are respectively a first end 51 and a second end 52. The first end 51 passes through the body 41 and the heating space 411. In communication, the second end 52 communicates with the condensing unit 6 through the heat exchange tube 2; more specifically, a portion of the vapor line 5 is located in the heat exchange space 23 (hereinafter referred to as The portion of the vapor line 5 in the heat exchange space 23 is referred to as a first preheating portion, and the first preheating portion is formed downward from the liquid discharge end 22 of the heat exchange tube 2 toward the liquid inlet end 21 tilt. In addition, the vapor line 5 of the present embodiment is preferably further provided with a reduced diameter portion 53 and a venting opening 54 which is disposed on the inner wall surface of the vapor line 5 and adjacent to the heat exchange tube 2 a liquid outlet end 22; the vent hole 54 extends through the vapor line 5 and is located on one side of the reduced diameter portion 53. When water vapor in the vapor line 5 flows from the first end 51 to the second At the end 52, the reduced diameter portion 53 and the vent hole 54 are sequentially passed. As a result, when the water vapor passes through the reduced diameter portion 53, the flow path is pressurized, and the flow rate is increased after passing through the reduced diameter portion 53, so that the chlorine gas mixed in the water vapor can be discharged through the exhaust hole 54. In order to remove chlorine gas to purify water vapor.

Referring to FIG. 1 again, the condensing unit 6 is composed of a condensation tube 61 and a plurality of heat dissipation fins 62. One end of the condensation tube 61 And communicating with the second end 52 of the vapor line 5, the other end of the condensation tube 61 is in communication with the liquid collection container 7; wherein the condensation tube 61 is preferably disposed in the housing in a meandering manner. In the accommodating space 11 of 1, that is, the condensing duct 61 communicates with one end of the vapor line 5 toward the other end to form a downward inclination. The plurality of heat dissipating fins 62 are arranged at equal intervals on the outer circumferential surface of the condensing duct 61 for increasing the overall heat dissipating area of the condensing duct 61. In addition, the condensing unit 6 is preferably further provided with a fan 63 disposed on one side of the condensing duct 61 for continuously supplying air toward the condensing duct 61 to lower the temperature of the condensing duct 61.

The liquid collection container 7 is provided with a liquid inlet port 71, a liquid outlet port 72 and a liquid storage space 73. The liquid inlet port 71 and the liquid outlet port 72 are both connected to the liquid storage space 73, and the liquid inlet port 71 is connected. Preferably, the liquid outlets 72 are respectively disposed at the top and bottom of the liquid collection container 7; wherein the liquid inlet 71 communicates with one end of the condensation tube 61 via a pipeline, and the liquid outlet 72 borrows The other energy-saving heating unit 8 is connected by another line; the liquid storage space 73 is for storing the distilled liquid passing through the condensing unit 6. In addition, the sump container 7 of the present embodiment is preferably further provided with a sterilizing unit 74 and a filtering unit 75. The sterilizing unit 74 is disposed in the liquid storage space 73, and the sterilizing unit 74 is preferably selected as an ultraviolet lamp. a tube for sterilizing the distilled liquid in the liquid storage space 73; the filtering unit 75 is preferably disposed at the liquid inlet 71 for preliminary filtering into the liquid storage space 73 through the liquid inlet 71 Distillate the liquid.

Referring to Figures 1 and 4, the energy-saving heating unit 8 is disposed outside the vapor line 5 of another portion, and preferably between the heat exchange tube 2 and the condensing unit 6; more specifically, the The energy-saving heating unit 8 has a An energy-saving heat exchange tube 81, a uniform heat element 82 and a temperature control element 83. The energy-saving heat exchange tube 81 is provided with a water inlet end 811, a water outlet end 812 and an energy-saving heat exchange space 813. The water inlet end 811 and the water outlet end 812 are respectively The opposite ends of the energy-saving heat exchange tube 81, and the water inlet end 811 and the water outlet end 812 are both connected to the energy-saving heat exchange space 813; the water inlet end 811 is connected to the liquid outlet 72 of the liquid collection container 7 via a pipeline. The water outlet end 812 is in communication with the water outlet valve 9 via another conduit, thereby allowing the distilled liquid in the liquid storage space 73 to flow to the energy-saving heat exchange space 813 via the water inlet end 811. Then, the water outlet end 812 flows to the water discharge valve 9. Wherein, the other part of the steam line 5 is located in the energy-saving heat exchange space 813 (hereinafter, the other part of the vapor line 5 accommodated in the energy-saving heat exchange space 813 is referred to as a second preheating part), and The second preheating portion is interposed between the first preheating portion and the second end 52 of the vapor line 5.

The heat generating element 82 is preferably housed in the energy-saving heat exchange space 813 to directly heat the distilled liquid in the energy-saving heat exchange space 813. The temperature control element 83 is electrically connected to the heating element 82 for instantly monitoring the temperature of the distilled liquid in the energy-saving heat exchange space 813, and can control the heating element 82 to generate heat. Moreover, the pipeline connecting the liquid outlet 72 and the water inlet 811 is preferably provided with a pump P, and the pump P is electrically connected to the water outlet valve 9.

Referring to FIG. 5, in a preferred embodiment of the present invention, after the liquid system in the liquid supply unit 12 enters the heat exchange space 23 through the water supply port 122 and the liquid inlet end 21 in advance, And exiting the heat exchange space 23 through the liquid discharge end 22, and passing through the water level control unit 3 through the pipeline to enter the heating space 411 of the hot water tank 4; The heating unit 42 heats the liquid in the heating space 411 to a boiling temperature, so that the water in the liquid is vaporized into water vapor, and then enters the vapor line 5 through the first end 51 of the vapor line 5, and Flows in the direction of the second end 52 of the vapor line 5. When the water vapor passes through the first preheating portion of the vapor line 5, heat can be exchanged with the liquid in the heat exchange space 23 through the wall of the first preheating portion, thereby preheating the heat. The temperature of the liquid in the space 23 is exchanged; at the same time, part of the water vapor in the first preheating portion is cooled and condensed into liquid water, and the first preheating portion of the vapor line 5 is simultaneously mixed with water vapor and liquid water.

Moreover, since the first preheating portion of the vapor line 5 is inclined downward from the liquid discharge end 22 of the heat exchange tube 2 toward the liquid inlet end 21, the water vapor and the liquid in the first preheating portion Water can sequentially flow through the second preheating portion and the second end 52 of the vapor line 5 along the oblique direction, and then smoothly introduced into the condensation tube 61; subsequently, water vapor and liquid water are also along The slanting direction of the condensing pipe 61 gradually flows toward the liquid inlet port 71 of the liquid collecting container 7, and the water vapor and the liquid water in the condensing pipe 61 are continuously exchanged with the condensing pipe 61 for the condensing pipe. The water vapor in the 61 can be completely cooled and condensed into liquid water. Finally, the liquid water is sequentially introduced into the liquid storage space 73 of the liquid collection container 7 through the filtering unit 75 and the liquid inlet 71 to complete the distillation liquid. do.

If the distillate liquid in the liquid collection space 73 is to be taken, the user can send a control signal through the water discharge valve 9 to drive the pump P to move the distilled liquid in the liquid collection space 73 to the pipeline. The outlet valve 9 is output for drinking. Moreover, if the heated distilled liquid is to be consumed, the distilled liquid enters the energy-saving heat through the liquid outlet 72 and the water inlet end 811 in sequence. After the space 813 is exchanged, since the first preheating portion of the vapor line 5 is mixed with water vapor and liquid water, and the temperature of the water vapor and the liquid water is relatively higher than the temperature of the distilled liquid, the water vapor and When the liquid water flows to the second preheating portion, the wall of the second preheating portion can still exchange heat with the distilled liquid in the energy-saving heat exchange space 813, thereby preliminarily increasing the energy saving heat. The temperature of the distilled liquid in the exchange space 813; at the same time, if the temperature control element 83 monitors that the temperature of the distilled liquid in the energy-saving heat exchange space 813 has reached a temperature suitable for drinking, then it is selected not to drive the heating element 82 to operate; On the other hand, if the temperature control component 83 monitors that the distilled liquid in the energy-saving heat exchange space 813 has not reached the temperature suitable for drinking, a heating signal is sent to drive the heating element 82 to generate heat to heat the energy-saving heat exchange space 813. Distilled liquid inside.

The energy-saving heating unit of the present invention flows through the energy-saving heating unit 8 in advance through the distillation liquid in the liquid collection container 7 before flowing to the water discharge valve 9, so that the second preheating portion of the vapor line 5 is relatively opposed. The high-temperature steam and liquid water can exchange heat with the relatively low-temperature distillation liquid in the energy-saving heat exchange space 813, thereby effectively increasing the temperature of the distilled liquid to relatively reduce the temperature difference between the distilled liquid and the temperature suitable for drinking. Therefore, the heating element 82 only needs to use a small amount of energy, and even the heating element 82 can achieve the temperature suitable for drinking without any energy source, so that the invention has the energy saving effect. .

The distilled water drinking device of the present invention flows through the heat exchange tube 2 through the liquid in the liquid supply unit 12 before flowing to the heating space 411 of the hot water tank 4, so that the vapor line 5 is Relative in a preheating section The high temperature water vapor can exchange heat with the relatively low temperature liquid in the heat exchange space 23, and the temperature of the liquid can be raised in advance to relatively reduce the error between the liquid entering the heating space 411 and the boiling temperature. The heating unit 42 only needs to use a small amount of energy to vaporize the water in the liquid into water vapor, which effectively saves the energy required for the heating unit 42, so that the invention has the effect of further saving energy.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

〔this invention〕

1‧‧‧shell

11‧‧‧ accommodating space

12‧‧‧liquid supply unit

121‧‧‧Liquid space

122‧‧‧Water supply port

123‧‧‧ cover

2‧‧‧Heat exchange tube

21‧‧‧ liquid inlet

22‧‧‧liquid end

23‧‧‧Hot exchange space

3‧‧‧Water level control unit

31‧‧‧

311‧‧ ‧ room

312‧‧ ‧ water inlet

313‧‧‧Water outlet

314‧‧‧First Limitation Department

32‧‧‧stops

321‧‧‧

322‧‧‧Second Limitation

4‧‧‧ hot water gall

41‧‧‧Ontology

411‧‧‧heating space

42‧‧‧heating unit

5‧‧‧Vapor line

51‧‧‧ first end

52‧‧‧ second end

53‧‧‧Reducing section

54‧‧‧ venting holes

6‧‧‧Condensation unit

61‧‧‧Condensation tube

62‧‧‧Heat fins

63‧‧‧Fan

7‧‧‧liquid container

71‧‧‧Inlet

72‧‧‧liquid outlet

73‧‧‧Liquid space

74‧‧‧Sterilization unit

75‧‧‧Filter unit

8‧‧‧Energy-saving heating unit

81‧‧‧Energy-saving heat exchange tubes

811‧‧‧ into the water

812‧‧‧ water outlet

813‧‧‧Energy-saving heat exchange space

82‧‧‧Heating element

83‧‧‧temperature control components

9‧‧‧Water outlet valve

P‧‧‧ pump

T‧‧‧Water supply line

V‧‧‧ check valve

Fig. 1 is a schematic cross-sectional view showing the distillation type drinking fountain device of the preferred embodiment of the present invention.

Figure 2 is a partial cross-sectional view showing a heat exchange tube in accordance with a preferred embodiment of the present invention.

Figure 3 is a schematic cross-sectional view showing the water level control unit of the preferred embodiment of the present invention.

Figure 4 is a partial cross-sectional view showing the energy-saving heating unit of the preferred embodiment of the present invention.

Figure 5 is a schematic view showing the use of the distilled water dispenser of the preferred embodiment of the present invention.

1. . . case

11. . . Housing space

12. . . Liquid supply unit

121. . . Liquid space

122. . . Water supply port

123. . . Cover

2. . . Heat exchange tube

twenty one. . . Liquid inlet

twenty two. . . Liquid outlet

twenty three. . . Heat exchange space

3. . . Water level control unit

31. . . Slot

311. . . Room

312. . . water intake

313. . . Outlet

32. . . Stop

321. . . Plug

4. . . Hot water gall

41. . . Ontology

411. . . Heating space

42. . . Heating unit

5. . . Steam line

51. . . First end

52. . . Second end

6. . . Condensing unit

61. . . Condenser

62. . . Heat sink fin

63. . . fan

7. . . Liquid collection container

71. . . Inlet

72. . . Liquid outlet

73. . . Liquid storage space

74. . . Sterilization unit

75. . . Filter unit

8. . . Energy-saving heating unit

81. . . Energy-saving heat exchange tube

811. . . Water inlet

812. . . Water outlet

813. . . Energy-saving heat exchange space

82. . . Heating element

83. . . Temperature control element

9. . . Outlet valve

P. . . Pump

T. . . Water supply line

V. . . Check valve

Claims (12)

A distilled water drinking device comprises: a liquid supply unit having a water supply port; a heat exchange tube having a liquid inlet end, a liquid outlet end and a heat exchange space, the liquid inlet end being connected to the water supply port And the liquid inlet end and the liquid outlet end are connected to the heat exchange space; a hot water tank has a body and a heating unit, the body is provided with a heating space, and the heating space is connected to the heat exchange tube via a pipeline The liquid discharge end is connected to the body, the heating unit is disposed on the body; a vapor line has a first end and a second end, the first end is in communication with the heating space, and a portion of the steam tube a condensing unit having a condensing tube, one end of the condensing tube being in communication with the second end of the vapor line; a sump container having a liquid storage space, the storing The liquid space is in communication with the other end of the condensing tube; an energy-saving heating unit has an energy-saving heat exchange tube and a uniform heat element, and the energy-saving heat exchange tube is coated outside another part of the steam line, the energy-saving heat exchange tube has Once in the water, a water And an energy-saving heat exchange space, the water inlet end is connected to the liquid storage space, and the water inlet end and the water outlet end are connected to the energy-saving heat exchange space, the heating element is disposed on the energy-saving heat exchange tube; and a water outlet a valve connected to the outlet end of the energy-saving heat exchange tube via a pipeline; Wherein, a water level control unit is disposed between the heat exchange tube and the hot water tank, and the water level control unit is respectively connected to the liquid outlet end of the heat exchange tube and the heating space of the hot water tank through different pipelines; and the water level The control unit has a slot body and a stop member. The slot body is provided with a chamber. The stop member is disposed in the chamber, and the stop member has a density smaller than a density of the liquid contained in the chamber. The distilled water drinking device according to claim 1, wherein the energy-saving heating unit is further provided with a temperature control element, and the temperature control element is electrically connected to the heating element. The distilled water drinking device according to claim 2, wherein the energy-saving heat exchange unit is located between the heat exchange tube and the condensing unit. The distilling type drinking water device according to claim 1, wherein the tank body is provided with a water inlet and a water outlet, and the water inlet and the water outlet are connected to the chamber, and the water inlet is It is in communication with the liquid discharge end of the heat exchange tube, and the water outlet is in communication with the heating space of the hot water bladder. The distilled water drinking device according to claim 4, wherein the stopper is provided with a plug portion, the plug portion is located at the water inlet, and the plug portion can be lifted and lowered in the chamber along with the stopper Actuate to close or open the water inlet. The distilling type drinking water device according to the first aspect of the invention, wherein the inner wall surface of the trough body is provided with a first limiting portion, and the outer wall surface of the stopping member is provided with a second limiting portion, The second limiting portion can be detached or combined with the first limit according to the movement of the stopper in the chamber Position. The distilling type drinking water device according to claim 1, 2 or 3, further comprising a check valve disposed in a line connecting the water level control unit and the hot water bladder. According to the distilling type drinking water device of the first, second or third aspect of the invention, wherein the condensing unit is further provided with a plurality of fins, and the plurality of fins are arranged at equal intervals on the outer peripheral surface of the condensing duct. The distilling type drinking fountain device according to claim 1, wherein the condensing unit is further provided with a fan disposed on one side of the condensing duct and blowing air toward the condensing duct. The distilling type drinking water device according to the above-mentioned patent application, wherein the liquid collecting container is further provided with a sterilizing unit and a filtering unit, wherein the sterilizing unit is disposed in the liquid storage space, and the filtering unit is disposed in the liquid storage unit. A conduit between the condensing tube and the sump container is connected. The distilled water drinking device according to claim 1, 2 or 3, further comprising a pump, the pump being disposed in a pipeline connecting the water outlet valve and the water outlet end of the energy-saving heat exchange space . The distilling type drinking water device according to claim 1, wherein the vapor line is provided with a reduced diameter portion and a venting hole, and the reduced diameter portion is disposed on an inner wall surface of the vapor line. And adjacent to the liquid discharge end of the heat exchange tube, the exhaust hole penetrates the steam line and is located on one side of the reduced diameter portion.