Flat plate heat exchanger and water purifier thereof

Abstract

The utility model discloses a flat plate heat exchanger and water purifier thereof, include: center plate, the middle part has the heat exchange area, and the heat exchange area is the corrugated board structure with ridge portion and groove portion and the ridge portion and groove portion in it are the U type structure of the arrangement in turn alternation, first side plate is set up in one side of center plate and forms the cold water channel between both, and first side plate is provided with cold water inlet and cold water outlet respectively in the both ends corresponding cold water channel, second side plate is set up in the other side of center plate and forms the hot water channel between both, and second side plate is provided with hot water inlet and hot water outlet respectively in the both ends corresponding hot water channel. The utility model discloses flat plate heat exchanger effectively increased water channel length, increased heat exchange time, improved heat exchange efficiency, corresponding water purifier's cold water first preheats after, then heats through instant heating type heating body, effectively improved hot water outlet flow rate, avoided water repeatedly heating simultaneously, guaranteed drinking water health.

Description

Technical Field

[0001] This utility model relates to the field of drinking water equipment technology, and in particular to a flat plate heat exchanger and its water purifier. Background Technology

[0002] With the improvement of living standards, people have put forward new requirements for the quality and use of drinking water. Water purification equipment that can purify and filter water and directly heat it for drinking has been widely used. To meet people's need for hot water at any time, water purification equipment generally uses three solutions: 1. Equipped with an instant heating element. For water purifiers equipped with an instant heating element, since the maximum current of a household wall socket is generally 10A, the heating element power must be less than 2200W. According to the law of conservation of energy, the instant hot water flow rate is generally 400mL / min, which is slow, resulting in long waiting times for users to get water and a poor user experience; 2. Equipped with a heating tank. The water is heated and maintained at a certain temperature, such as around 95 degrees Celsius. When hot water is needed, it is taken directly from the heating tank. This ensures that the hot water temperature and flow rate are guaranteed. However, because the water in the hot water tank needs to be kept at a certain temperature, it is repeatedly heated, resulting in repeatedly boiled water that may be unhealthy. 3. A combined treatment method using a preheating tank and an instant heating element works by heating the water twice to increase flow rate. First, cold water is placed in the hot water tank and preheated to a certain temperature, such as 85 degrees Celsius. When hot water is dispensed, the preheated water is pumped to the instant heating element for a second heating to achieve a larger flow rate. This also results in repeatedly heated water that may be unhealthy. Utility Model Content

[0003] This utility model aims to overcome the deficiencies in the prior art by providing a flat plate heat exchanger with a simple and reasonable structure. It effectively increases the length of the water channel, the heat exchange time, and the heat exchange efficiency. Simultaneously, it provides a water purifier where, during water intake, cold water first exchanges heat with preheated water in the flat plate heat exchanger. After the exchange, the cold water temperature rises rapidly, and then it undergoes a second heating process via an instant heating element. This rapidly increases the outlet water temperature, improving heating efficiency, shortening heating time, and thus increasing the hot water flow rate. Furthermore, it ensures that the heated drinking water is fresh, avoiding repeated heating and guaranteeing drinking water health.

[0004] To achieve the above objectives, this utility model provides a flat plate heat exchanger, comprising: A central plate, the central part of which has a heat exchange zone, the heat exchange zone being a corrugated plate structure with ridges and grooves, wherein the ridges and grooves are arranged alternately in a U-shape. The first side plate is disposed on one side of the center plate and the two are sealed and welded together to form at least one U-shaped cold water channel. The first side plate is provided with a cold water inlet and a cold water outlet at both ends of the cold water channel, respectively. The second side plate is located on the other side of the center plate and the two are sealed and welded together to form at least one U-shaped hot water channel. The second side plate is provided with a hot water inlet and a hot water outlet at both ends of the hot water channel.

[0005] The configuration is further defined as follows: the first side plate has a first concave surface for sealing the heat exchange area of ​​the central plate, and the ridge in the heat exchange area abuts against and is welded to the first concave surface; The second side plate has a second concave surface for sealing the heat exchange area of ​​the central plate, and the groove in the heat exchange area abuts against and is welded to the second concave surface.

[0006] A further feature is provided: a welding surface is provided at the middle position of the heat exchange zone corresponding to the U-shaped structure; The first concave surface has a U-shaped structure, and the first side plate has a first mating surface that is welded to the welding surface of the center plate at the middle position of the first concave surface. The second concave surface has a U-shaped structure, and the second side plate has a second mating surface that is welded to the welding surface of the center plate at the middle position of the second concave surface.

[0007] A further configuration is provided: a first groove is provided on the first mating surface.

[0008] A second groove is provided on the second mating surface.

[0009] The configuration is further defined as follows: both ends of the U-shaped first concave surface protrude outside the heat exchange zone to form two cold water inlet and outlet chambers, and the cold water inlet and cold water outlet are respectively provided on the two cold water inlet and outlet chambers; The two ends of the U-shape of the second concave surface protrude outside the heat exchange zone to form two hot water inlet and outlet chambers, and the hot water inlet and hot water outlet are respectively set on the two hot water inlet and outlet chambers.

[0010] The hot water flow direction in the hot water channel is opposite to the cold water flow direction in the cold water channel.

[0011] This utility model also provides a water purifier, including a water purification module, a water outlet faucet, a preheating water tank, a regulating pump, an instant heating element, and the aforementioned flat plate heat exchanger. The water purification module's inlet is connected to the water source, and its outlet is divided into two paths: one path is connected to the water tap and a one-way valve is installed on the pipeline, and the other path is connected to the cold water inlet of the plate heat exchanger. The plate heat exchanger is installed in a preheated water tank containing water, and the cold water outlet of the plate heat exchanger is connected in sequence to a regulating pump, an instant heating element, and a water tap through pipelines. The preheating water tank is equipped with a heating component for heating the water inside to a set temperature. The preheating water tank is also equipped with a hot water circulation pump that circulates the water inside between the hot water channels of the flat plate heat exchanger.

[0012] Compared with existing technologies, the flat plate heat exchanger of this utility model has a simple structure and is easy to manufacture. It effectively increases the length of the water channel, increases the heat exchange time, and improves the heat exchange efficiency. At the same time, it also provides a water purifier. When water is taken out, the cold water first exchanges heat with the preheated water in the flat plate heat exchanger. After the exchange, the temperature of the cold water rises rapidly. Then, it is heated a second time by an instant heating element, and the outlet water temperature rises rapidly, which improves the heating efficiency, shortens the heating time, increases the hot water outlet flow rate, and ensures that the heated drinking water is fresh, avoiding repeated heating and ensuring drinking water health. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of a flat plate heat exchanger according to the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of a flat plate heat exchanger. Figure 1 ; Figure 3 This is a cross-sectional view of a flat plate heat exchanger. Figure 2 ; Figure 4 This is a schematic diagram of the separation structure of a flat plate heat exchanger; Figure 5 This is a schematic diagram of the water circuit connection structure of a water purifier.

[0014] The following reference numerals are marked on the accompanying drawings: 100. Flat plate heat exchanger; 10. Center plate; 11. Heat exchange zone; 111. Ridge; 112. Groove; 113. Welding surface; 20. First side plate; 21. First concave surface; 22. Cold water inlet; 23. Cold water outlet; 24. First mating surface; 241. First groove; 30. Second side plate; 31. Second concave surface; 32. Hot water inlet; 33. Hot water outlet; 34. Second mating surface; 341. Second groove; 200. Water purification module; 300. Preheating water tank; 310. Heating component; 320. Water level switch; 400. Regulating pump; 500. Instant heating element; 600. Hot water circulation pump; 700. Check valve; 800. Water tap.

[0015] L, cold water channel; L1, cold water inlet / outlet chamber; R, hot water channel; R1, hot water inlet / outlet chamber. Detailed Implementation

[0016] The following describes a specific embodiment of the present invention in detail with reference to the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0017] This utility model relates to a flat plate heat exchanger 100, as shown in the figure. Figure 1 , Figure 2 and Figure 3 As shown, the system includes a central plate 10 and a first side plate 20 and a second side plate 30 respectively disposed on both sides of the central plate 10. The central plate 10 has a heat exchange zone 11 in its middle section. This heat exchange zone 11 is a corrugated plate structure with ridges 111 and grooves 112, wherein the ridges 111 and grooves 112 are arranged alternately in a U-shape. A ridge 111 on one side of the heat exchange zone 11 is a groove 112 on the other side, and vice versa. The first side plate 20 is sealed and welded to one side of the central plate 10 to form at least one U-shaped cold water channel L. The first side plate 20 has a cold water inlet 22 and a cold water outlet 30 respectively disposed at both ends of the cold water channel L. Outlet 23; The second side plate 30 is sealed and welded to the other side of the center plate 10 to form at least one U-shaped hot water channel R. Hot water inlet 32 ​​and hot water outlet 33 are respectively provided on the second side plate 30 corresponding to the two ends of the hot water channel R. Cold water and hot water flow in the cold water channel L and hot water channel R on both sides of the center plate 10, respectively. In this way, the cold water is preheated to a certain temperature through heat exchange, which effectively improves the hot water output speed of the water purifier. At the same time, the flat plate heat exchanger 100 adopts a U-shaped channel, which effectively increases the length of the water channel, increases the heat exchange time, and improves the heat exchange efficiency. More preferably, the cold water flow direction is opposite to the hot water flow direction, that is, the cold water and hot water exchange heat in reverse.

[0018] In this embodiment, as Figure 3 and Figure 4As shown, the first side plate 20 has a first concave surface 21 for sealing the heat exchange zone 11 of the center plate 10. The ridge 111 in the heat exchange zone 11 abuts against and is welded to the first concave surface 21, thus forming a plurality of parallel-arranged micro U-shaped cold water channels L between the first side plate 20 and the center plate 10, effectively reducing the pressure loss of the flow channel and ensuring the requirement of large flow rate; the second side plate 30 has a second concave surface 31 for sealing the heat exchange zone 11 of the center plate 10. The groove 112 in the heat exchange zone 11 abuts against and is welded to the second concave surface 31, thus forming a plurality of parallel-arranged micro U-shaped cold water channels L between the second side plate 30 and the center plate 10. The small U-shaped hot water channel R effectively reduces the pressure loss of the flow channel and ensures the requirement of large flow rate; preferably, the height of the ridge 111 on the center plate 10 is slightly greater than the depth of the first concave surface 21 on the first side plate 20, and the depth of the groove 112 on the center plate 10 is slightly greater than the depth of the second concave surface 31 on the second side plate 30. In this way, during welding, an interference fit is formed between the first side plate 20 and the center plate 10, and between the second side plate 30 and the center plate 10. This allows the center plate 10 to be tightly attached to the inner side of the first side plate 20 and the second side plate 30 to form separate channels.

[0019] In this embodiment, as Figure 3 and Figure 4 As shown, the heat exchange zone 11 has a welding surface 113 at the middle position of the U-shaped structure; the first concave surface 21 is a U-shaped structure, and the first side plate 20 has a first mating surface 24 at the middle position of the first concave surface 21, which is welded to the welding surface 113 of the center plate 10. At the same time, a first groove 241 is provided in the middle of the first mating surface 24, so that the U-shaped cold water channel L can be better welded; the second concave surface 31 is a U-shaped structure, and the second side plate has a second mating surface 34 at the middle position of the second concave surface 31, which is welded to the welding surface 113 of the center plate 10. At the same time, a second groove 341 is provided in the middle of the second mating surface 34, so that the U-shaped hot water channel R can be better welded.

[0020] In this embodiment, as Figure 2 As shown, both ends of the U-shaped first concave surface 21 protrude outside the heat exchange zone 11 to form two cold water inlet and outlet chambers L1. The cold water inlet 22 and the cold water outlet 23 are respectively set on the two cold water inlet and outlet chambers L1. In this way, the cold water inlet 22 can flow cold water to each micro channel through the cold water inlet and outlet chambers L1, while the cold water outlet 23 can collect the cold water from each micro channel through the cold water inlet and outlet chambers L1 for centralized discharge.

[0021] In this embodiment, as Figure 2As shown, both ends of the U-shaped second concave surface 31 protrude outside the heat exchange zone 11 to form two hot water inlet and outlet chambers R1. The hot water inlet 32 ​​and the hot water outlet 33 are respectively set on the two hot water inlet and outlet chambers R1. In this way, the hot water inlet 32 ​​can divert the hot water to each micro channel through the hot water inlet and outlet chamber R1 for flow, while the hot water outlet 33 can collect the cold water from each micro channel through the hot water inlet and outlet chamber R1 for centralized discharge.

[0022] This utility model relates to a water purifier, such as... Figure 5 As shown, it includes a water purification module 200, a water outlet 800, a preheating water tank 300, a regulating pump 400, an instant heating element 500, and the aforementioned flat plate heat exchanger 100. The inlet of the water purification module 200 is connected to a water source, and its outlet is divided into two paths: one path is connected to the water outlet 800, and the other path is connected to the cold water inlet 22 of the flat plate heat exchanger 100. Preferably, a one-way valve 700 is installed on the pipeline between the water purification module 200 and the water outlet 800. The flat plate heat exchanger 100 is installed in the preheating water tank 300 containing water. The cold water outlet 23 of the flat plate heat exchanger 100 is connected to the regulating pump 400, the instant heating element 500, and the water outlet 800 in sequence through pipelines. The water is connected to the preheating tank 300. A heating element 310 is provided on the preheating tank 300 to heat the water inside to a set temperature (80℃-87℃). The preheating tank 300 is also provided with a hot water circulation pump 600, which makes the water in the preheating tank 300 circulate between the hot water channels R of the plate heat exchanger 100. Preferably, the preheating tank 300 is filled with water and the plate heat exchanger 100 is completely submerged in water, so as to better heat the cold water in the plate heat exchanger 100. Preferably, the preheating tank 300 is also equipped with a water level switch 320, a thermostat, a water inlet and an exhaust port, so as to ensure the water level and water temperature in the preheating tank 300.

[0023] Compared with existing technologies, the flat plate heat exchanger of this utility model has a simple structure and is easy to manufacture. It effectively increases the length of the water channel, increases the heat exchange time, and improves the heat exchange efficiency. At the same time, it also provides a water purifier. When water is taken out, the cold water first exchanges heat with the preheated water in the flat plate heat exchanger. After the exchange, the temperature of the cold water rises rapidly. Then, it is heated a second time by an instant heating element, and the outlet water temperature rises rapidly, which improves the heating efficiency, shortens the heating time, increases the hot water outlet flow rate, and ensures that the heated drinking water is fresh, avoiding repeated heating and ensuring drinking water health.

[0024] The above-disclosed embodiments are merely examples of the present utility model. However, the present utility model is not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A flat plate heat exchanger, characterized in that, include: A central plate, the central part of which has a heat exchange zone, the heat exchange zone being a corrugated plate structure with ridges and grooves, wherein the ridges and grooves are arranged alternately in a U-shape. The first side plate is disposed on one side of the center plate and the two are sealed and welded together to form at least one U-shaped cold water channel. The first side plate is provided with a cold water inlet and a cold water outlet at both ends of the cold water channel, respectively. The second side plate is located on the other side of the center plate and the two are sealed and welded together to form at least one U-shaped hot water channel. The second side plate is provided with a hot water inlet and a hot water outlet at both ends of the hot water channel.

2. A flat plate heat exchanger according to claim 1, characterized in that, The first side plate has a first concave surface for sealing the heat exchange area of ​​the central plate, and the ridge in the heat exchange area abuts against and is welded to the first concave surface; The second side plate has a second concave surface for sealing the heat exchange area of ​​the central plate, and the groove in the heat exchange area abuts against and is welded to the second concave surface.

3. A flat plate heat exchanger according to claim 2, characterized in that, The heat exchange zone is provided with a welding surface at the middle position of the U-shaped structure; The first concave surface has a U-shaped structure, and the first side plate has a first mating surface that is welded to the welding surface of the center plate at the middle position of the first concave surface. The second concave surface has a U-shaped structure, and the second side plate has a second mating surface that is welded to the welding surface of the center plate at the middle position of the second concave surface.

4. A flat plate heat exchanger according to claim 3, characterized in that, A first groove is provided on the first mating surface; A second groove is provided on the second mating surface.

5. A flat plate heat exchanger according to claim 3, characterized in that, Both ends of the U-shape of the first concave surface protrude outside the heat exchange zone to form two cold water inlet and outlet chambers, and the cold water inlet and cold water outlet are respectively provided on the two cold water inlet and outlet chambers; The two ends of the U-shape of the second concave surface protrude outside the heat exchange zone to form two hot water inlet and outlet chambers, and the hot water inlet and hot water outlet are respectively set on the two hot water inlet and outlet chambers.

6. A flat plate heat exchanger according to claim 1 or 5, characterized in that, The hot water flow direction in the hot water channel is opposite to the cold water flow direction in the cold water channel.

7. A water purifier, characterized in that, It includes a water purification module, a water outlet faucet, a preheating water tank, a regulating pump, an instant heating element, and the flat plate heat exchanger as described in any one of claims 1-6 above; The water purification module's inlet is connected to the water source, and its outlet is divided into two paths: one path is connected to the water tap and a one-way valve is installed on the pipeline, and the other path is connected to the cold water inlet of the plate heat exchanger. The plate heat exchanger is installed in a preheated water tank containing water, and the cold water outlet of the plate heat exchanger is connected in sequence to a regulating pump, an instant heating element, and a water tap through pipelines. The preheating water tank is equipped with a heating component for heating the water inside to a set temperature. The preheating water tank is also equipped with a hot water circulation pump that circulates the water inside between the hot water channels of the flat plate heat exchanger.

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