CN102826620B - Energy-saving water distiller - Google Patents

Abstract

The invention relates to the technical field of distilled water production equipment, in particular to an energy-saving distilled water machine, which comprises a preheating device and a heat exchange device connected with the preheating device, wherein a circulation loop respectively passing through cooling water and water vapor is formed inside the preheating device and the heat exchange device, and raw material water is used as cooling water to condense the water vapor, so that on one hand, the temperature of the raw material water rises after absorbing heat, energy is saved for converting subsequent raw material water into the water vapor, and on the other hand, the raw material water generates a large amount of water vapor inside the heat exchange device after absorbing the heat, and the output efficiency of producing distilled water by unit raw material water is improved; the invention has the advantages of simple structure, high heat exchange efficiency, large water yield and high heat energy utilization rate.

Description

An energy-saving distilled water machine

technical field

The invention relates to the technical field of distilled water production equipment, in particular to an energy-saving distilled water machine.

Background technique

Distilled water refers to pure water prepared by distillation, which is widely used in medical treatment, scientific research, production and life. The demand for pure drinking water is also increasing. In the production process of distilled water, a heating device is first required to heat and evaporate water into water vapor, and then cool the water vapor to condense it into distilled water. The existing distilled water production equipment not only has a complex structure, but also consumes a large amount of cooling water during the condensation process, resulting in low heat exchange efficiency, small distilled water production, large energy consumption, and high production costs.

Contents of the invention

The purpose of the present invention is to provide an energy-saving distilled water machine with simple structure, high heat exchange efficiency, large water production volume and high heat energy utilization rate.

In order to achieve the above object, the present invention adopts the following technical solutions.

An energy-saving distilled water machine, comprising a preheating device and a heat exchange device connected to the preheating device, the preheating device includes a shell and a heating tube inside the shell, the shell is also provided with a water vapor collection The water vapor collecting and pressurizing device is provided with a water vapor outlet and a water vapor suction port, and the inside of the heat exchange device is provided with a raw material water inlet channel, a raw material water return channel, a first water vapor channel, a second The water vapor channel and the distilled water discharge channel, the heat exchange device is composed of a number of A-type heat exchange plates and B-type heat exchange plates arranged at intervals in sequence, and the A-type heat exchange plates are respectively formed with adjacent B-type heat exchange plates for supply The raw material water gap channel through which raw material water passes and the water vapor gap channel through which water vapor passes; the water vapor outlet communicates with the first water vapor channel, and the first water vapor channel communicates with the water vapor gap channel, The water vapor gap channel communicates with the distilled water discharge channel; the raw material water inlet channel communicates with the raw material water gap channel, and the raw material water gap channel is respectively connected to the raw material water return channel, the second water The steam passage is connected, the raw material water return passage is connected with the inner chamber of the preheating device, and the second water vapor passage is connected with the water vapor suction port.

Wherein, the A-type heat exchange plate and the B-type heat exchange plate are closely attached; the bottom right side of the A-type heat exchange plate is provided with an A-plate raw material water inlet hole, and the bottom left side is provided with an A-plate Raw material water return flow hole, there is a distilled water discharge through hole in the middle of the bottom of the A plate, the first water vapor through hole of the A plate is set at both ends of the upper part, and the second water vapor through hole of the A plate is set in the middle of the upper part; the B-type heat exchange On the right side of the bottom of the plate, there is a water inlet hole for the raw material water of the B plate, on the left side of the bottom, there is a return flow hole for the raw material water of the B plate, in the middle of the bottom, there is a through hole for the distilled water discharge of the B plate, and at both ends of the upper part, there are the first water holes of the B plate. The steam hole is provided with the second water vapor hole of the B plate in the middle of the upper part.

Wherein, the side of the housing is provided with a raw water inlet, a raw water return port, a distilled water outlet, a water vapor outlet, and a water vapor inlet, and the water vapor outlet is connected to the water vapor outlet of the water vapor collection and pressurization device. The water vapor inlet is connected with the water vapor suction port of the water vapor collection and pressurization device; the raw water inlet and the raw water return port are respectively connected with the raw water inlet channel and the raw water return channel; the distilled water The outlet communicates with the distilled water discharge channel.

Wherein, the raw material water inlet hole of plate A and the raw material water inlet hole of plate B are connected with the raw material water inlet to form a raw material water inlet channel, and the raw material water return flow hole of plate A and the raw material water return flow hole of plate B are connected to the raw material water inlet. The hole communicates with the raw material water return port and forms a raw material water return channel. The distilled water discharge through hole of plate A and the distilled water discharge through hole of plate B communicate with the distilled water outlet to form a distilled water discharge channel. The first water vapor through hole of plate A, The first water vapor through hole of plate B communicates with the water vapor outlet and forms the first water vapor channel, and the second water vapor through hole of plate A and the second water vapor through hole of plate B communicate with the water vapor inlet and form the second water vapor channel. steam channel.

Wherein, the raw material water inlet of plate A is provided with a side flow inlet of raw material water, the raw material water return hole of plate A is provided with a side flow outlet of raw material water, and the second water vapor through hole of plate A is provided with a secondary Water vapor escape port; the first water vapor through hole of the B plate is provided with a water vapor input port, and the distilled water discharge through hole of the B plate is provided with a distilled water discharge port; the bottom of the raw material water gap channel is respectively connected to the raw material water side The flow inlet and the raw material water side outlet are connected; the top of the raw material water gap channel is communicated with the second water vapor channel through the secondary water vapor escape port; the water vapor gap channel is connected with the primary water vapor input port and the distilled water discharge port respectively. connected.

Wherein, the A-type heat exchange plate and the B-type heat exchange plate are sequentially arranged at intervals, and are connected to the preheating device through the fixing ribs arranged on both sides and the fixing plates arranged at the end.

Wherein, a spring is provided at one end of the fixed rib connected to the fixed plate.

Wherein, the heat exchange device includes a first heat exchange device and a second heat exchange device, and the first heat exchange device and the second heat exchange device are respectively connected to two ends of the preheating device.

Wherein, the A-type heat exchange plate is provided with an A-plate groove, and the B-type heat exchange plate is provided with a B-plate groove.

Wherein, a water level gauge is provided inside the housing.

Wherein, a waste gas discharge pipe is arranged inside the housing.

The beneficial effects of the present invention are:

(1) The energy-saving water distiller of the present invention uses lower-temperature raw material water as cooling water to condense water vapor, and the lower-temperature raw material water absorbs heat and then rises in temperature, and then heated by a heating tube for a short period of time to produce A large amount of primary water vapor. In the production process, it is only necessary to ensure that the heating tube heats the raw water for 25 minutes per hour to ensure that the raw water continuously generates a large amount of water vapor, reducing the heating time and reducing the unit power consumption of the distilled water machine by 15KW/h. Reduced energy consumption.

(2) The energy-saving distilled water machine of the present invention uses raw water with a lower temperature as cooling water, and after absorbing heat in the heat exchange process, a large amount of secondary water vapor is generated inside the heat exchange device, which increases the output of distilled water per unit time , improved water production efficiency.

(3) The present invention has simple structure, convenient operation, and high heat exchange efficiency. During the production process, when the feed water temperature of the raw material water is 25°C, the outlet temperature of the distilled water can be guaranteed to be 28°C, and has a high heat energy utilization rate.

Description of drawings

Fig. 1 is a structural schematic diagram of an energy-saving water distiller of the present invention.

Fig. 2 is a schematic cross-sectional structural view of the housing of the energy-saving water distiller of the present invention.

Fig. 3 is a schematic structural view of the A-type heat exchange plate of Embodiment 1 of the present invention.

Fig. 4 is a schematic structural view of a B-type heat exchange plate in Example 1 of the present invention.

Fig. 5 is a schematic structural view of a type A heat exchange plate in Example 2 of the present invention.

Fig. 6 is a schematic structural view of a B-type heat exchange plate in Example 2 of the present invention.

Reference signs include:

1—preheating device; 11—raw water inlet; 12—raw water return port; 13—distilled water outlet; 14—water vapor outlet; 15—water vapor inlet; 16—shell; 2—heat exchange device; 21—A Type heat exchange plate; 211—A plate raw material water inlet through hole; 212—A plate raw material water return flow hole; 213—A plate distilled water discharge through hole; 214—A plate first water vapor through hole; 215—A plate Second water vapor through hole; 216—raw material water side flow inlet; 217—raw material water side flow outlet; 218—secondary steam escape outlet; 219—A plate groove; 22—B type heat exchange plate; 221—B 222—the raw material water return hole of the B board; 223—the distilled water discharge hole of the B board; 224—the first steam hole of the B board; 225—the second water vapor hole of the B board; 226 — Primary water vapor input port; 227 — Distilled water outlet; 228 — B plate groove; 3 — Water vapor collection pressurization device; 4 — Fixed rib; 5 — Fixed plate; 6 — Spring.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings.

Example 1.

As shown in Figures 1 to 4, an energy-saving distilled water machine includes a preheating device 1 and a heat exchange device 2 connected to the preheating device 1. The preheating device 1 includes a housing 16 and is located inside the housing 1 The inside of the housing 16 is also provided with a water vapor collection pressurization device 3, the water vapor collection pressurization device 3 is provided with a water vapor discharge port and a water vapor suction port, and the heat exchange device 2 is composed of several The A-type heat exchange plates 21 and B-type heat exchange plates 22 with through holes are arranged at intervals in sequence, and the A-type heat exchange plates 21 and the adjacent B-type heat exchange plates 22 form a gap for raw water to pass through. The raw material water gap channel and the water vapor gap channel through which water vapor passes, specifically, the A-type heat exchange plate 21 and the previous B-type heat exchange plate 22 form a raw material water gap channel, and the A-type heat exchange plate 21 and the subsequent B-type heat exchange plate The heat exchange plates 22 constitute water vapor interstitial channels. The inside of the heat exchange device 2 is provided with a raw material water inlet channel, a raw material water return channel, a first water vapor channel, a second water vapor channel, and a distilled water discharge channel; the water vapor outlet and the first water vapor channel In communication, the first water vapor channel communicates with the water vapor gap channel, and the water vapor gap channel communicates with the distilled water discharge channel; the raw material water inlet channel communicates with the raw material water gap channel, and the The raw material water gap channel communicates with the raw material water return channel and the second water vapor channel respectively, the raw material water return channel communicates with the inner cavity of the preheating device, and the second water vapor channel communicates with the water vapor channel. The steam suction port is connected.

In this embodiment, the sides of the A-type heat exchange plate 21 and the B-type heat exchange plate 22 are closely attached, and there is a gap channel in the middle. The water inlet hole 211, the left side of the bottom is provided with the raw material water return hole 212 of the plate A, the distilled water discharge hole 213 of the plate A is arranged in the middle of the bottom, the first steam hole 214 of the plate A is arranged at both ends of the upper part, and the first water vapor hole 214 of the plate A is arranged in the middle of the upper part. There is a second water vapor passage hole 215 on the A plate; the bottom right side of the B-type heat exchange plate is provided with a B plate raw material water inlet through hole 221, and the bottom left side is provided with a B plate raw material water return flow hole 222, and the bottom middle There is a distilled water discharge through hole 223 on the B plate, a first water vapor through hole 224 on the B plate at both ends of the upper part, a second water vapor through hole 225 on the B plate in the middle of the upper part, and a raw material is provided on the side of the shell 16. Water inlet 11, raw material water return port 12, distilled water outlet 13, water vapor outlet 14, water vapor inlet 15, described water vapor outlet 14, water vapor inlet 15 are respectively connected with the water vapor outlet of water vapor collecting pressurization device 3, The water vapor suction port is connected; the raw material water inlet 11 and the raw water return port 12 are respectively connected with the raw material water inlet channel and the raw material water return channel; the distilled water outlet 13 is connected with the distilled water discharge channel.

In this embodiment, the raw material water inlet hole 211 of plate A and the raw material water inlet hole 221 of plate B communicate with the raw material water inlet 11 to form a raw material water inlet channel; the raw material water return flow hole 212 of plate A , B board raw material water return hole 222 communicates with raw material water return port 12 and forms a raw material water return passage; said A board distilled water discharge through hole 213, B board distilled water discharge through hole 223 communicates with distilled water outlet 13 and forms a distilled water discharge channel The first water vapor through hole 214 of the A plate, the first water vapor through hole 224 of the B plate communicate with the water vapor outlet 14 and form the first water vapor passage; the second water vapor through hole 215 of the A plate, the B plate The second water vapor through hole 225 communicates with the water vapor inlet 15 and forms a second water vapor channel.

In this embodiment, the raw material water inlet hole 211 of plate A is provided with a raw material water side flow inlet 216, the raw material water return hole 212 of plate A is provided with a raw material water side flow outlet 217, and the second water vapor of plate A is The through hole 215 is provided with a secondary water vapor escape port 218; the first water vapor through hole 224 of the B plate is provided with a primary water vapor input port 226, and the distilled water discharge through hole 223 of the B plate is provided with a distilled water discharge port 227; The bottom of the raw material water gap channel is respectively connected to the raw material water side flow inlet 216, the raw material water side outflow port 217, the raw material water inlet channel, and the raw material water return channel; the top of the raw material water gap channel passes through the secondary water vapor The escape port 218 communicates with the second water vapor channel; the water vapor gap channel respectively communicates with the primary water vapor input port 224 , the distilled water outlet 227 , the first water vapor channel, and the distilled water outlet channel.

In this embodiment, the A-type heat exchange plates 21 and B-type heat exchange plates 22 are sequentially arranged at intervals, and any two adjacent A-type heat exchange plates 21 and B-type heat exchange plates 22 are provided with gap channels Since the A-type heat exchange plate 21 is provided with a raw material water side flow inlet 216, a raw material water side flow outlet 217, and a secondary water vapor escape port 218, the B-type heat exchange plate 22 is provided with a primary water vapor input port 226, distilled water Outlet 227; raw material water with a lower temperature enters the raw material water gap channel between the A-type heat exchange plate 21 and the B-type heat exchange plate 22 through the raw material water side flow inlet 216 of the A-type heat exchange plate 21, and completes the heat exchange process After that, the raw water flows out of the raw water gap passage between the A-type heat exchange plate 21 and the B-type heat exchange plate 22 through the raw water side outlet 217; The primary water vapor input port 226 of the B-type heat exchange plate 22 enters the water vapor gap channel between the A-type heat exchange plate 21 and the B-type heat exchange plate 22, and completes the condensation process inside the water vapor gap channel, and passes through after becoming distilled water The distilled water is discharged from the outlet 227; therefore, water vapor and raw water respectively pass through the gap channels between any two heat exchange plates, and the water vapor and raw water are separated by the heat exchange plates and will not contact each other.

The preheating device 1 and the heat exchange device 2 of the energy-saving distilled water machine of the present invention are connected with each other to form a whole, respectively forming a raw water inlet channel, a raw material water return channel, a distilled water discharge channel, a first water vapor channel, and a second water vapor channel. aisle. During the production process, the energy-saving distilled water machine will carry out the following three working processes at the same time:

(1) The heating tube inside the casing 16 of the preheating device 1 heats the raw water inside the casing 16, so that the temperature of the raw water rises to generate water vapor, which is called primary water vapor herein, and the water vapor The collecting and pressurizing device 3 collects the above-mentioned primary water vapor and applies pressure to discharge the primary water vapor through the water vapor outlet 14. After the discharged water vapor enters the first water vapor channel, it passes through the primary water vapor input of the B-type heat exchange plate 22. The port 226 enters the water vapor gap channel between the A-type heat exchange plate 21 and the B-type heat exchange plate 22, and becomes distilled water after heat exchange with the lower temperature raw material water, and is discharged through the distilled water discharge channel.

(2) Raw material water with low temperature is transported to the raw material water inlet 11 through the external raw material water delivery pipeline, then enters the raw material water inlet channel, and then enters the raw material water inlet 216 through the side flow inlet 216 of the A-type heat exchange plate 21 The raw material water gap channel between the A-type heat exchange plate 21 and the B-type heat exchange plate 22 for the raw material water to pass through, and exchanges heat with the water vapor on the other side of the heat exchange plate during the flow process, and the temperature is relatively low After the raw material water undergoes heat exchange process, it absorbs heat and becomes higher temperature raw material water, then enters the raw material water return channel through the raw material water side outflow port 217 of the A-type heat exchange plate 21, and finally flows back to the shell of the preheating device 1 The inside of the body becomes water vapor after being heated by the heating tube, and the above working process (1) is repeated.

(3) After the heat exchange process, the lower temperature raw water absorbs heat and the temperature rises to generate a large amount of secondary water vapor. This part of the secondary water vapor passes through the secondary water vapor outlet 218 of the A-type heat exchange plate 21 Discharge the raw material water gap channel between the A-type heat exchange plate 21 and the B-type heat exchange plate 22, then enter the second water vapor channel, enter the water vapor collection pressurization device 3 through the water vapor inlet 15, and pass through the water vapor collection After the pressure is applied by the pressurizing device 3, it is discharged through the water vapor outlet 14 and enters the first water vapor channel, enters the water vapor gap channel between the heat exchange plates, and becomes distilled water after heat exchange with the raw material water at a lower temperature and is discharged through the distilled water channel discharge.

In the production process of the energy-saving distilled water machine of the present invention, the above-mentioned three working processes are carried out simultaneously, and the water vapor is cooled by using raw water as cooling water. Lower raw material water absorption, the temperature of the raw material water rises to 90-95°C, and then returns to the preheating device 1 to generate a large amount of water vapor after a short period of heating by the heating tube, reducing the conversion of the raw material water to The heating time in the process of water vapor saves energy; at the same time, in the process of heat exchange between raw water and water vapor, the raw water after the temperature rises will also generate a large amount of water vapor, which is called secondary water vapor in this part , this part of the secondary water vapor becomes distilled water through the above working process (3). Due to the generation of this part of water vapor, the water production per unit time of the energy-saving distilled water machine of the present invention increases, and the water production efficiency is greatly improved. Production costs are reduced.

In this embodiment, the steam collecting and pressurizing device 3 is provided with a turbine inside. During the production process, the turbine works to transfer the primary water vapor generated in the housing 16 to the raw material water of the heat exchange device 2. The secondary water vapor generated in the channel is inhaled into the water vapor collecting and pressurizing device 3 through the water vapor inlet 15, and is discharged through the water vapor outlet 14 after exerting pressure on the inhaled water vapor, then enters the first water vapor channel, and then enters the hot water vapor channel. The water vapor gap channels between the exchange plates condense into distilled water.

In this embodiment, the A-type heat exchange plates 21 and B-type heat exchange plates 22 are arranged at intervals in sequence, and are connected to the preheating device 1 through the fixing ribs 4 on both sides and the fixing plates 5 at the ends. The fixed plate 5 has two functions, one is to cooperate with the fixed rib 4 to closely overlap and connect a plurality of A-type heat exchange plates 21 and B-type heat exchange plates 22 together, and at the same time be closely connected with the preheating device 1; The second is to seal the ends of the raw material water inlet channel, raw material water return channel, distilled water discharge channel, first water vapor channel, and second water vapor channel inside the energy-saving distilled water machine.

Preferably, a spring 6 is provided at one end of the fixing rib 4 connected to the fixing plate 5 . The spring 6 can adjust the superposition pressure between the A-type heat exchange plate 21 and the B-type heat exchange plate, when the water vapor gap channel between the A-type heat exchange plate 21 and the B-type heat exchange plate When the water vapor pressure decreases, the spring 6 can reduce the width of the gap channel between the A-type heat exchange plate 21 and the B-type heat exchange plate, ensuring that the gap between the A-type heat exchange plate 21 and the B-type heat exchange plate 22 When the water vapor pressure in the water vapor gap channel between the A-type heat exchange plate 21 and the B-type heat exchange plate increases, the spring 6 can make the A-type heat exchange plate 21 and the B-type heat exchange plate The width of the gap channel between the type heat exchange plates is increased to prevent water vapor leakage or damage to the heat exchange device 2 due to excessive pressure.

Preferably, the heat exchange device 2 includes a first heat exchange device and a second heat exchange device, and the first heat exchange device and the second heat exchange device are respectively connected to both ends of the preheating device 1 . During the production process, the first heat exchange device and the second heat exchange device can condense the primary water vapor at the same time, and at the same time can generate more secondary water vapor, increase the output of distilled water per unit time, improve production efficiency, and reduce cost.

In this embodiment, a water level gauge is provided inside the housing 16 . The capacity of the raw material water inside the housing 16 is measured by a water level gauge, and the housing 16 is also provided with an observation window for observing the situation inside the housing.

In this embodiment, the housing 16 is provided with a waste gas discharge pipe. The opening of the waste gas discharge pipe is located at the upper part of the internal space of the housing 16. During the production process, the waste gas discharge pipe is opened for 2 to 3 minutes every hour to remove the accumulated oxygen and other gases inside the housing and improve the efficiency of heat exchange. .

Example 2.

As shown in Figures 5 to 6, the difference between this embodiment and Embodiment 1 is that the A-type heat exchange plate 21 is provided with a number of A-plate grooves 219, and the B-type heat exchange plate 22 is provided with a number of B grooves. The plate groove 228, the A plate groove 219 and the B plate groove 228 can increase the heat exchange area of the A-type heat exchange plate 21 and the B-type heat exchange plate 22, and improve the heat exchange efficiency.

For the technical features not explained in this embodiment, the explanations in Embodiment 1 are used, and details are not repeated here.

The above embodiments are only used to illustrate the technical solution of the present invention rather than limiting the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solution of the present invention can be carried out Modification or equivalent replacement without departing from the spirit and scope of the technical solution of the present invention.

Claims (1)

1. An energy-saving distilled water machine, comprising a preheating device and a heat exchange device connected with the preheating device, the preheating device includes a housing and a heating tube positioned inside the housing, and the housing is also provided with a water vapor A collection and pressurization device, the water vapor collection and pressurization device is provided with a water vapor outlet and a water vapor suction port, and it is characterized in that the heat exchange device consists of several A-type heat exchange plates and B-type heat exchange plates arranged at intervals in sequence Composition, the A-type heat exchange plate and the adjacent B-type heat exchange plate respectively form the raw material water gap channel for the raw material water to pass through and the water vapor gap channel for the water vapor to pass through, and the inside of the heat exchange device is equipped with a raw material water inlet Water channel, raw material water return channel, first water vapor channel, second water vapor channel, distilled water discharge channel; the water vapor discharge port communicates with the first water vapor channel, and the first water vapor channel communicates with the The water vapor gap channel is connected, and the water vapor gap channel is connected with the distilled water discharge channel; the raw material water inlet channel is connected with the raw material water gap channel, and the raw material water gap channel is respectively connected with the raw material water return channel . The second water vapor channel is in communication, the raw material water return channel is in communication with the inner cavity of the preheating device, and the second water vapor channel is in communication with the water vapor suction port; The surroundings of the A-type heat exchange plate and the B-type heat exchange plate are closely bonded; the bottom right side of the A-type heat exchange plate is provided with an A-plate raw material water inlet hole, and the bottom left side is provided with an A-plate raw material water hole. Circulation holes, the middle of the bottom is provided with a plate A distilled water discharge through hole, the two ends of the upper part are provided with the first water vapor through hole of the A plate, and the upper middle is provided with the second water vapor through hole of the A plate; the B-type heat exchange plate On the right side of the bottom, there is a water inlet hole for the raw material of the B plate, on the left side of the bottom, there is a return hole for the raw material water of the B plate, in the middle of the bottom, there is a through hole for the distilled water discharge of the B plate, and at both ends of the upper part, there are the first water vapor channels of the B plate. hole, the upper middle is provided with the second water vapor hole of the B plate; The side of the housing is provided with a raw water inlet, a raw water return port, a distilled water outlet, a water vapor outlet, and a water vapor inlet, and the water vapor outlet communicates with the water vapor outlet of the water vapor collection and pressurization device. The water vapor inlet is connected with the water vapor suction port of the water vapor collecting and pressurizing device; the raw water inlet and the raw water return port are respectively connected with the raw water inlet passage and the raw water return passage; the distilled water outlet is connected with the raw water return passage. The distilled water discharge channel is connected; The raw material water inlet through hole of plate A and the raw water inlet through hole of plate B are connected with the raw material water inlet to form a raw material water inlet channel, and the raw material water return hole of plate A and the raw material water return hole of plate B The raw material water return port is connected to form a raw material water return channel. The distilled water discharge through hole of the A plate and the B plate distilled water discharge through hole are connected with the distilled water outlet to form a distilled water discharge channel. The first water vapor through hole of the A plate and the B plate The first water vapor through hole communicates with the water vapor outlet and forms the first water vapor channel, the second water vapor through hole of plate A and the second water vapor through hole of plate B communicate with the water vapor inlet and forms the second water vapor channel ; The raw material water inlet hole of plate A is provided with a raw material water side flow inlet, the raw material water return hole of plate A is provided with a raw material water side flow outlet, and the second water vapor through hole of plate A is provided with a secondary steam outlet. Escape port; the first water vapor hole of the B plate is provided with a primary water vapor input port, and the distilled water discharge hole of the B plate is provided with a distilled water discharge port; the bottom of the raw water gap channel is respectively connected to the raw water side flow inlet 1. The raw material water side outflow port is connected; the top of the raw water gap channel is communicated with the second water vapor channel through the secondary water vapor escape port; the water vapor gap channel is respectively connected with the primary water vapor input port and the distilled water discharge port. 2. The energy-saving distilled water machine according to claim 1, characterized in that, the A-type heat exchange plate and the B-type heat exchange plate are sequentially arranged at intervals, and the fixed ribs arranged on both sides and the ends The fixed plate is connected with the preheating device. 3. The energy-saving distilled water machine according to claim 2, wherein a spring is provided at one end of the fixed rib connected to the fixed plate. 4. The energy-saving distilled water machine according to claim 1, wherein the heat exchange device comprises a first heat exchange device and a second heat exchange device, and the first heat exchange device and the second heat exchange device are respectively Connect to both ends of the preheating device. 5. The energy-saving distilled water machine according to claim 1, wherein the A-type heat exchange plate is provided with an A-plate groove, and the B-type heat exchange plate is provided with a B-plate groove. 6. The energy-saving distilled water machine according to claim 1, wherein a water level gauge is provided inside the housing. 7. The energy-saving water distiller according to claim 1, wherein a waste gas discharge pipe is provided inside the housing.

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