Water heater and control method

Abstract

The invention provides a water heater and a control method, relates to the technical field of water heaters, and solves the technical problems of non-linear temperature rise and shock cooling and shock heating of the water heater. The water heater comprises a barrel, a microbubble generating device, a gas inlet pipe, a steam generating device, a water outlet pipe, a water inlet pipe, a gas circulating pipe and a gas collecting disc. The microbubble generating device is mounted at the bottom of the barrel; the gas collecting disc is arranged at the top of the barrel; one end of the gas circulating pipe is communicated with the gas collecting disc, and the other end of the gas circulating pipe is communicated with the external environment of the barrel; the steam generating device is connected with the microbubble generating device through an air inlet pipe; the water inlet pipe and the water outlet pipe are communicated with the inner cavity of the barrel. Internal boiling type heating is adopted, water is heated through high-temperature microbubbles, the heat exchange area is greatly increased, the heating efficiency is improved, redundant hot steam is recycled, heat exchange is sufficient, and the phenomenon of shock cooling and shock heating is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of water heaters, and in particular to an internal boiling circulation water heater and a control method thereof. Background Art

[0002] As people's quality of life continues to improve, water heaters are household appliances that are used frequently in every family, covering all aspects of life. The water boiling speed of water heaters is still a major factor affecting people's use, especially when the cold machine is started, users cannot enjoy hot water quickly, so it is very necessary to improve the efficiency of hot water produced by water heaters.

[0003] In order to solve the problem of slow hot water efficiency of water heaters, a condensing heat exchange device of a gas water heater is disclosed in the prior art, including a shell, a smoke exhaust pipe, a cold water inlet and water inlet pipe, and a warm water outlet; a split condensing waste heat exchanger and a condensed water collection structure thereof are provided in the shell, the split condensing waste heat exchanger includes a first heat exchanger and a second heat exchanger with heat exchange tubes, the warm water outlet of the first heat exchanger is connected to the second heat exchanger through a connecting pipe, and a high-temperature water pipe is provided on the second heat exchanger. The condensed water collection structure includes a guide plate, a groove portion at the bottom of the shell, and a condensed water outlet pipe. The cold water of the device can be preheated in the first heat exchanger using waste heat and then enter the second heat exchanger to be heated and turned into high-temperature water to flow out.

[0004] The applicant has found that the prior art has at least the following technical problems: the water in the water tank of this condensate heat exchange device is statically heated, the internal temperature distribution is uneven, and there are problems of non-linear temperature rise and sudden cooling and heating. Summary of the invention

[0005] The object of the present invention is to provide an internal boiling circulation water heater and a control method thereof, so as to solve the technical problems of nonlinear temperature rise and sudden cooling and heating of the water heater existing in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a water heater, comprising a cylinder, a micro-bubble generating device, an air inlet pipe, a steam generating device, a water outlet pipe, a water inlet pipe, a gas circulation pipe, and a gas collecting plate; wherein:

[0008] The microbubble generating device is installed at the bottom of the cylinder;

[0009] The gas collecting plate is arranged on the top of the cylinder;

[0010] The gas circulation pipe is arranged in the cylinder, and one end of the gas circulation pipe is connected to the gas collecting plate, and the other end of the gas circulation pipe is connected to the external environment of the cylinder;

[0011] The steam generating device is connected to the micro-bubble generating device via the air inlet pipe;

[0012] The water inlet pipe and the water outlet pipe are both communicated with the inner cavity of the cylinder.

[0013] The water heater provided by the present invention adopts internal boiling heating to heat water through high-temperature microbubbles, and the heat exchange area is greatly increased, which not only improves the heating efficiency, but also avoids the occurrence of sudden cooling and heating by recycling excess hot steam and fully exchanging heat.

[0014] As a further improvement of the present invention, the micro-bubble generating device comprises a chassis and a gas distribution plate; wherein:

[0015] The interior of the chassis is a hollow structure;

[0016] The bottom of the chassis is connected to the air intake pipe;

[0017] The top of the chassis is provided with a plurality of air holes;

[0018] There are several gas distribution plates, which are respectively installed on several of the air holes.

[0019] As a further improvement of the present invention, the gas distribution plate includes a hollow gas distribution shell, micro holes, and a connecting pipe; wherein:

[0020] One end of the connecting pipe is connected to the air hole, and the other end is connected to the inner cavity of the air separation shell;

[0021] The number of the micro holes is several and they are evenly arranged on the top of the gas separation shell.

[0022] As a further improvement of the present invention, all of the micro holes are arranged in a divergent shape with the center of the gas separation shell as the center.

[0023] As a further improvement of the present invention, the micro holes are circular holes.

[0024] As a further improvement of the present invention, the micro-holes are outwardly protruding structures.

[0025] As a further improvement of the present invention, the gas collecting plate comprises a sealing plate and a collecting shell with a hollow interior; wherein:

[0026] The sealing disk covers the top of the cylinder;

[0027] The sealing disc is provided with a through opening;

[0028] The collecting shell is located on the top of the sealing disk and is connected to the through-hole through a collecting pipe;

[0029] One end of the gas circulation pipe passes through the sealing disk and communicates with the inner cavity of the collection shell, and the other end of the gas circulation pipe extends inside the cylinder and passes through the sealing disk and communicates with the external environment.

[0030] As a further improvement of the present invention, the gas circulation pipe includes a plurality of single circulation pipes, and all of the single circulation pipes are evenly arranged along the circumferential direction of the collecting shell.

[0031] As a further improvement of the present invention, each of the single circulation tubes is formed by connecting a plurality of U tubes end to end.

[0032] As a further improvement of the present invention, the water inlet pipe and the water outlet pipe are staggered, and the installation height of the water outlet pipe is greater than the installation height of the water inlet pipe.

[0033] The water heater of the present invention adopts high-temperature fine bubbles to heat water. Compared with the traditional heating method, while achieving bottom heating, since the bubbles move upward under the action of air pressure, heat exchange is achieved in the process, the heat exchange area is greatly increased, and the heat exchange efficiency is significantly improved. On the other hand, the temperature decreases and the pressure decreases during the rising process of the high-temperature bubbles. The bubbles gradually become smaller before the water boils, and even dissolve in the water. In this process, the water at the bottom and upper part of the heating chamber can be heated, reducing the internal temperature difference. In addition, a circulation system is provided inside to achieve the purpose of rapid heating.

[0034] The present invention provides a control method for controlling the water heater, and the control method comprises the following steps:

[0035] Turn on the water heater, and cold water enters the heating chamber of the cylinder through the water inlet pipe;

[0036] Turning on the microbubble generating device to heat the water in the heating chamber in an internal boiling manner;

[0037] After the vapor is recovered from the gas collection plate, it is sent to the gas circulation pipe for recycling;

[0038] Determine the difference between the water temperature and the preset temperature t0;

[0039] When the water temperature is ≥ the preset temperature t0, the water outlet pipe is opened to supply hot water;

[0040] When the water temperature is less than the preset temperature t0, the microbubble generating device continues to be turned on for internal boiling heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 It is a schematic diagram of the three-dimensional structure of the internal boiling micro-circulation water heater of the present invention;

[0043] Figure 2 is a rear view of the internal boiling micro-circulation water heater of the present invention;

[0044] Figure 3 is a top view of the internal boiling micro-circulation water heater of the present invention;

[0045] Figure 4 This is a front view of the internal boiling micro-circulation water heater of the present invention;

[0046] Figure 5 yes Figure 4 Middle AA section view;

[0047] Figure 6 It is a schematic diagram of the explosion structure of the internal boiling micro-circulation water heater of the present invention;

[0048] Figure 7 It is a top view of a micro-bubble generating device in an internal boiling micro-circulation water heater of the present invention;

[0049] Figure 8 It is a schematic diagram of the explosion structure of the micro-bubble generating device in the internal boiling micro-circulation water heater of the present invention;

[0050] Fig. 9 It is a top view of the gas distribution plate in the micro-bubble generating device in the boiling micro-circulation water heater of the present invention;

[0051] Fig.10 yes Figure 7 Middle B is a partial enlarged view;

[0052] Fig.11 It is a front view of the gas distribution plate in the micro-bubble generating device in the internal boiling micro-circulation water heater of the present invention;

[0053] Fig.12 It is a flow chart of the control method of the internal boiling micro-circulation water heater of the present invention.

[0054] In the figure, 1, cylinder; 2, micro bubble generating device; 21, bottom plate; 22, gas distribution plate; 221, gas distribution shell; 222, micro hole; 223, connecting pipe; 23, air hole; 3, air inlet pipe; 4, steam generating device; 5, water outlet pipe; 51, water outlet valve; 6, water inlet pipe; 61, water inlet valve; 7, gas circulation pipe; 71, single circulation pipe; 8, gas collecting plate; 81, sealing plate; 82, collecting shell; 83, collecting pipe. DETAILED DESCRIPTION

[0055] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0056] like Figure 1-Figure 11 As shown, the present invention provides an internal boiling micro-circulation water heater, comprising a cylinder 1, a micro-bubble generating device 2, an air inlet pipe 3, a steam generating device 4, a water outlet pipe 5, a water inlet pipe 6, a gas circulation pipe 7, a gas collecting tray 8, a water inlet valve 61, and a water outlet valve 51; wherein:

[0057] The cylinder 1 is a cylinder structure with two open ends, and a heating chamber is formed inside;

[0058] The microbubble generating device 2 is installed at the bottom of the cylinder 1 to seal the bottom of the cylinder 1 and continuously release microbubbles into the heating chamber of the cylinder 1;

[0059] The gas collecting plate 8 is arranged on the top of the cylinder 1 to seal the top of the cylinder 1 and collect excess bubbles;

[0060] The gas circulation pipe 7 is arranged in the cylinder 1, and one end of the gas circulation pipe 7 is connected to the gas collection plate 8, and the other end of the gas circulation pipe 7 is connected to the external environment of the cylinder. The high-temperature bubbles collected by the gas collection plate 8 can be transported to the cylinder 1 through the gas circulation pipe 7 to reuse the heat, so as to quickly increase the water temperature in the cylinder 1;

[0061] The steam generating device 4 is connected to the micro-bubble generating device 2 via the air inlet pipe 3, and is used to supply high-temperature steam to the micro-bubble generating device 2;

[0062] The water inlet pipe 6 and the water outlet pipe 5 are both connected to the inner cavity of the cylinder 1 to supply cold water to the cylinder 1 or output hot water from the cylinder 1 respectively.

[0063] The water inlet valve 61 is arranged on the water inlet pipe 6 , and the water outlet valve 51 is arranged on the water outlet pipe 5 .

[0064] The water heater provided by the present invention adopts internal boiling heating to heat water through high-temperature microbubbles, and the heat exchange area is greatly increased, which not only improves the heating efficiency, but also avoids the occurrence of sudden cooling and heating by recycling excess hot steam and fully exchanging heat.

[0065] like Figure 6-Figure 11 As shown, in this embodiment, the micro-bubble generating device 2 includes a base plate 21 and a gas distribution plate 22; wherein:

[0066] The interior of the chassis 21 is a hollow structure and can be used to store high-temperature steam;

[0067] The bottom of the chassis 21 is connected to the air intake pipe 3;

[0068] A plurality of air holes 23 are provided on the top of the chassis 21;

[0069] There are a plurality of gas distribution plates 22 , which are respectively installed on a plurality of gas holes 23 .

[0070] The steam released by the steam generating device 4 enters the inner cavity of the chassis 21 through the air inlet pipe 3, and then is dispersed to the air holes 23 at different positions in the inner cavity, enters the gas distribution plate 22 through the air holes 23, and then generates microbubbles through the gas distribution plate 22 and is released to different positions of the inner cavity of the cylinder 1 to form an internal boiling microcirculation heating mode.

[0071] As an optional embodiment of the present invention, Figure 8-Figure 11 As shown, the gas distribution plate 22 includes a hollow gas distribution shell 221, micro holes 222, and a connecting pipe 223; wherein:

[0072] One end of the connecting pipe 223 is connected to the air hole 23, and the other end is connected to the inner cavity of the air separation shell 221;

[0073] There are a plurality of micro holes 222 evenly arranged on the top of the gas separation shell 221 for releasing micro bubbles generated by high-temperature steam.

[0074] In order to achieve uniform heating effect and prevent sudden cooling, in this embodiment, Fig. 9 As shown, all the micro holes 222 are arranged in a divergent shape with the center of the gas separation shell 221 as the center.

[0075] Furthermore, if Fig.10 As shown, the micro-holes 222 are circular holes.

[0076] As an optional embodiment of the present invention, Figure 1-Figure 6 As shown, the gas collecting plate 8 comprises a sealing plate 81 and a collecting shell 82 with a hollow interior; wherein:

[0077] The sealing plate 81 is sealed on the top of the cylinder 1;

[0078] The sealing plate 81 is provided with a through opening;

[0079] The collecting shell 82 is located on the top of the sealing disk 81 and is connected to the through-hole through the collecting pipe 83; the rich high-temperature bubbles enter the inner cavity of the collecting shell 82 through the through-hole, and then disperse to different positions through the inner cavity of the collecting shell 82;

[0080] One end of the gas circulation pipe 7 passes through the sealing disk 81 and communicates with the inner cavity of the collection shell 82, and the other end of the gas circulation pipe 7 extends in the cylinder 1 and passes through the sealing disk 81 and communicates with the external environment.

[0081] like Figure 5 As shown, in this embodiment, in order to fully utilize the high-temperature bubbles at different positions in the cylinder 1, the gas circulation pipe 7 includes a plurality of circulation single pipes 71, such as Figure 3 As shown, all the circulation single tubes 71 are evenly arranged along the circumferential direction of the collecting shell 82. In this embodiment, the number of the circulation single tubes 71 is five.

[0082] like Figure 5 As shown, each circulating single tube 71 is composed of multiple U-shaped tubes connected end to end. This structural setting is to introduce the recovered high-temperature bubbles into the bottom position of the cylinder 1, and then increase the heat exchange area to make full use of the recovered high-temperature bubbles for heating.

[0083] In this embodiment, in order to prevent the phenomenon of sudden cooling and heating, the water inlet pipe 6 and the water outlet pipe 5 are staggered, and the two are respectively arranged on opposite sides of the cylinder 1, and the installation height of the water outlet pipe 5 is greater than the installation height of the water inlet pipe 6. By setting the water outlet pipe 5 higher, the water temperature of the outlet water can be guaranteed.

[0084] Directions:

[0085] When the water heater of the present invention is in use, in the cold state, the user starts the water heater, the water inlet valve 61 is opened, and water enters the heating chamber. The heating chamber is provided with a gas circulation pipe 7 and a gas distribution plate 22 at the bottom. The gas distribution plate 22 is composed of many micro holes 222. The high-temperature steam generated by the steam generating device 4 enters the bottom plate 21 through the bottom air inlet pipe 3. When the high-temperature and high-pressure steam is introduced into the bottom plate 21, it enters the cylinder 1 through the micro holes 222 on the gas distribution plate 22. The micro holes 222 decompose the high-temperature steam into tiny bubbles. The tiny bubbles emerge upward under the action of atmospheric pressure. During the emergence, the temperature they carry will exchange heat with the water in the heating chamber. Since tiny bubbles are generated and the number is large, the bubbles move upward quickly. On the one hand, the water in the bottom and the upper part is exchanged with heat. On the other hand, the bubbles generated are round, which greatly increases the contact area between the high-temperature micro bubbles and the cold water. In the cold state, the temperature can be quickly and linearly increased. After reaching the user-set temperature, the water outlet valve 51 on the water outlet pipe 5 is opened to output hot water.

[0086] In the hot engine state, the water inside is in a high-temperature state, and less steam is required. The excess steam generated will be recycled through the gas collection plate 8. The gas passing through the gas collection plate 8 will return to the bottom of the cylinder 1 through the gas circulation pipe 7 for secondary utilization. The gas circulation pipe 7 is formed by folding a plurality of U-shaped tubes, and heat is exchanged with the water inside the cylinder 1 through the tube wall. The steam generating device 4 will feedback control the steam outflow speed and microbubble density according to the temperature in the cylinder 1. When the temperature is not reached, the gas outflow speed and microbubble density will be increased until the temperature t0 set by the user is reached.

[0087] The water heater of the present invention adopts high-temperature fine bubbles to heat water. Compared with the traditional heating method, while achieving bottom heating, since the bubbles move upward under the action of air pressure, heat exchange is achieved in the process, the heat exchange area is greatly increased, and the heat exchange efficiency is significantly improved. On the other hand, the temperature decreases and the pressure decreases during the rising process of the high-temperature bubbles. The bubbles gradually become smaller before the water boils, and even dissolve in the water. In this process, the water at the bottom and upper part of the heating chamber can be heated, reducing the internal temperature difference. In addition, a circulation system is provided inside to achieve the purpose of rapid heating.

[0088] like Fig.12 As shown, the present invention provides a control method for controlling the above water heater. Specifically, the control method includes the following steps:

[0089] Step S1, turn on the water heater, open the water inlet valve 61 on the water inlet pipe 6, and allow cold water to enter the heating chamber of the cylinder 1 through the water inlet pipe 6;

[0090] Step S2, turning on the micro-bubble generating device 2 to perform internal boiling heating on the water in the heating chamber through high-temperature micro-bubbles, and the cold water and the hot water are mixed in the heating chamber of the cylinder 1 in an up-and-down motion in a boiling state;

[0091] Step S3, the internal circulation system is started, and the gas collecting plate 8 recovers the steam and then sends it to the gas circulation pipe 7 for recycling;

[0092] Step S4, judging the water temperature and the preset temperature t0;

[0093] Step S5, when the water temperature is ≥ the preset temperature t0, the water outlet valve 51 on the water outlet pipe 5 is opened to supply hot water;

[0094] Step S6: When the water temperature is less than the preset temperature t0, the microbubble generating device 2 is continuously turned on to perform internal boiling heating.

[0095] The water heater of the present invention adopts internal boiling heating to increase the turbulence of water in the heating chamber and realize rapid heating. The generation degree of high-temperature fine bubbles is controlled by the temperature of the outlet water, and the speed and temperature of the heating are controlled. The high-temperature fine bubble generating device can evenly generate high-micro bubbles from the bottom, and the components become smaller or even dissolved in the water during the rising process. The heat exchange process is long and the temperature difference in the heating chamber is small.

[0096] First of all, it should be explained here that “inward” refers to the direction toward the center of the accommodating space, and “outward” refers to the direction away from the center of the accommodating space.

[0097] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0098] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0099] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0100] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0101] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0102] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A water heater, characterized in that: It includes a cylinder, a micro-bubble generating device, an air inlet pipe, a steam generating device, a water outlet pipe, a water inlet pipe, a gas circulation pipe, and a gas collecting plate; wherein: The microbubble generating device is installed at the bottom of the cylinder; The gas collecting plate is arranged on the top of the cylinder; The gas circulation pipe is arranged in the cylinder, and one end of the gas circulation pipe is connected to the gas collecting plate, and the other end of the gas circulation pipe is connected to the external environment of the cylinder; The steam generating device is connected to the micro-bubble generating device via the air inlet pipe; The water inlet pipe and the water outlet pipe are both communicated with the inner cavity of the cylinder.

2. The water heater according to claim 1, characterized in that: The micro-bubble generating device comprises a chassis and a gas distribution plate; wherein: The interior of the chassis is a hollow structure; The bottom of the chassis is connected to the air intake pipe; The top of the chassis is provided with a plurality of air holes; There are several gas distribution plates, which are respectively installed on several of the air holes.

3. The water heater according to claim 2, characterized in that: The gas distribution plate includes a hollow gas distribution shell, micro holes, and a connecting pipe; wherein: One end of the connecting pipe is connected to the air hole, and the other end is connected to the inner cavity of the air separation shell; The number of the micro holes is several and they are evenly arranged on the top of the gas separation shell.

4. The water heater according to claim 3, characterized in that: All the micro holes are arranged in a divergent shape with the center of the gas separation shell as the center.

5. The water heater according to claim 3, characterized in that: The micro holes are circular holes.

6. The water heater according to claim 1, characterized in that: The gas collecting plate comprises a sealing plate and a collecting shell with a hollow interior; wherein: The sealing disk covers the top of the cylinder; The sealing disc is provided with a through opening; The collecting shell is located on the top of the sealing disk and is connected to the through-hole through a collecting pipe; One end of the gas circulation pipe passes through the sealing disk and communicates with the inner cavity of the collection shell, and the other end of the gas circulation pipe extends inside the cylinder and passes through the sealing disk and communicates with the external environment.

7. The water heater according to claim 6, characterized in that: The gas circulation pipe includes a plurality of single circulation pipes, and all the single circulation pipes are evenly arranged along the circumferential direction of the collecting shell.

8. The water heater according to claim 7, characterized in that: Each of the circulating single tubes is formed by connecting a number of U tubes end to end.

9. The water heater according to claim 1, characterized in that: The water inlet pipe and the water outlet pipe are staggered, and the installation height of the water outlet pipe is greater than the installation height of the water inlet pipe.

10. A control method, characterized in that: Used to control the water heater according to any one of claims 1 to 9, the control method comprises the following steps: Turn on the water heater, and cold water enters the heating chamber of the cylinder through the water inlet pipe; Turning on the microbubble generating device to heat the water in the heating chamber in an internal boiling manner; After the vapor is recovered from the gas collection plate, it is sent to the gas circulation pipe for recycling; Determine the difference between the water temperature and the preset temperature t0; When the water temperature is ≥ the preset temperature t0, the water outlet pipe is opened to supply hot water; When the water temperature is less than the preset temperature t0, the microbubble generating device continues to be turned on for internal boiling heating.

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