Steam generating device and control method thereof
The steam generating device addresses uneven water temperature and stratification by circulating and evenly distributing water within the heat exchange chamber, enhancing heat transfer and reducing heating time.
Patent Information
- Application Number
- CN202411540904.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2024-12-13
AI Technical Summary
The existing steam generating devices experience uneven water temperature distribution and stratification during the heating process, leading to an insufficient heat transfer coefficient between water and refrigerant, which prolongs the heating time.
A steam generating device with a circulation mechanism and water distribution component that pumps water from the bottom to the top of the heat exchange chamber and evenly distributes it across heat exchange components, avoiding stratification and enhancing the heat exchange coefficient.
The solution improves heat exchange efficiency by ensuring even water distribution, reducing stratification, and shortening the heating process time while directly generating high-temperature and high-pressure steam without additional boosting equipment.
Smart Images
Figure CN119123683A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of steam generating devices, and in particular to a steam generating device and a control method thereof. Background Art
[0002] In the steam generating device, the high-temperature and high-pressure refrigerant discharged from the compressor exhaust port through the heat pump cycle exchanges heat with the water in the shell side of the heat exchanger in the heat exchange tube, and the water that absorbs heat will boil and vaporize into steam. This boiling and vaporization can be simplified into a heating process and an evaporation process. The heating process is when the water temperature rises to the saturation temperature corresponding to the saturation pressure in the steam generating device; the evaporation process is when the water continues to absorb heat and evaporates after reaching the saturation temperature to become water vapor at 100°C or above.
[0003] During the heating process, that is, when the water temperature rises to the saturation temperature corresponding to the preset saturation pressure in the steam generator, the water does not boil and does not flow. The water temperature in the heat exchanger is uneven, and there is a serious stratification problem. At this time, the heat exchange tube cannot take into account the evaporation process and the heating process at the same time, resulting in insufficient heat transfer coefficient between the water in the shell side of the heat exchanger and the refrigerant in the heat exchange tube, which greatly increases the time spent on the heating process. Summary of the invention
[0004] The present application provides a steam generating device and a control method thereof, wherein the steam generating device can improve the heat exchange effect and shorten the time of the heating process.
[0005] In the first aspect, the present application provides a steam generating device, comprising: a heat exchange container, having a heat exchange chamber and a water replenishment port and a steam outlet connected to the heat exchange chamber; a heat exchange component, arranged in the heat exchange chamber, for heating the water in the heat exchange chamber; a circulation mechanism, the water inlet end of the circulation mechanism is connected to the bottom of the heat exchange container, and the water outlet end of the circulation mechanism is connected to the top of the heat exchange container, for pumping the water at the bottom of the heat exchange chamber to the top of the heat exchange chamber; and a water distribution component, arranged in the heat exchange chamber, for receiving the water outputted by the water outlet end of the circulation mechanism, and evenly distributing the received water to the heat exchange component below; wherein the heat exchange component comprises a first part located below the water level and a second part located above the water level, and the second part is used to heat the water evenly distributed by the water distribution component.
[0006] In a possible implementation, the water distribution assembly has a buffer tank, which can buffer water output from the water outlet so that part of the heat exchange assembly is located above the water level and forms the second part.
[0007] In a possible implementation, the water distribution assembly also includes a liquid distribution trough arranged below the buffer trough, the liquid distribution trough is used to receive water overflowing from the buffer trough, and liquid distribution holes are evenly distributed on the liquid distribution trough, and the liquid distribution trough sprays water toward the heat exchange assembly through the liquid distribution holes.
[0008] In one possible implementation, the cache tank is horizontally arranged, and a first flange structure is arranged on the outer side of the cache tank. The first flange structure extends along the length direction of the heat exchange chamber, and an overflow hole is arranged on the first flange structure. The water in the cache tank overflows into the liquid distribution tank through the overflow hole.
[0009] In a possible implementation, a buffer structure is provided in the cache tank, and the buffer structure is provided below the water outlet end for buffering water output from the water outlet end.
[0010] In a possible implementation, the liquid distribution trough is horizontally arranged, and a second flange structure is arranged on the outer side of the liquid distribution trough, and the second flange structure extends along the length direction of the heat exchange cavity.
[0011] In a possible implementation, the liquid distribution holes include a first liquid distribution hole disposed at the bottom of the liquid distribution groove and a second liquid distribution hole disposed on the second flange structure.
[0012] In a possible implementation, a liquid level sensor is further included, and the liquid level sensor detects the liquid level of water in the heat exchange chamber and is used to control the initial water volume in the heat exchange chamber.
[0013] In a possible implementation, the steam generating device further includes: a temperature sensor for detecting the temperature of water in the heat exchange chamber; and a pressure sensor for detecting the pressure in the heat exchange chamber.
[0014] In a possible implementation, the circulation mechanism includes: a circulation pipeline having a water inlet end and a water outlet end; and a first pump body, disposed on the circulation pipeline, for pumping water from the water inlet end to the water outlet end.
[0015] In a possible implementation, the heat exchange assembly includes a plurality of heat exchange tubes, and the plurality of heat exchange tubes are extended along the length direction of the heat exchange cavity.
[0016] In the second aspect, an embodiment of the present application provides a control method for the above-mentioned steam generating device, comprising the following steps: the first part of the heat exchange component heats the water in the heat exchange chamber; the circulation mechanism drives the water at the bottom of the heat exchange chamber to the top of the heat exchange chamber, and distributes it evenly to the heat exchange chamber through the water distribution component; the second part of the heat exchange component heats the water evenly distributed by the water distribution component.
[0017] In one possible implementation, the water distribution assembly has a buffer tank, and the steam generating device also includes a liquid level sensor, which is used to detect the liquid level of water in the heat exchange chamber; the control method also includes: detecting the liquid level of water in the heat exchange chamber by the liquid level sensor, and then controlling the initial water volume in the heat exchange chamber; the buffer tank caches the water output from the water outlet so that part of the heat exchange assembly is located above the water level.
[0018] In a possible implementation, the steam generating device also includes a temperature sensor and a pressure sensor, the temperature sensor is used to detect the temperature of the water in the heat exchange chamber, and the pressure sensor is used to detect the pressure in the heat exchange chamber; the control method also includes: when the temperature of the water in the heat exchange chamber is lower than the saturation temperature corresponding to the preset steam pressure, the circulation mechanism circulates the water in the heat exchange chamber; when the temperature of the water in the heat exchange chamber reaches the saturation temperature corresponding to the preset steam pressure, the circulation mechanism stops circulating the water in the heat exchange chamber.
[0019] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:
[0020] The steam generating device and control method thereof provided in the embodiment of the present application, the steam generating device pumps the water at the bottom of the heat exchange chamber to the top of the heat exchange chamber through a circulation mechanism, and then re-sprinkles it into the heat exchange chamber through a water distribution component, thereby realizing the circulation of water, thereby avoiding uneven water temperature and powder layer phenomena during the heating process; and the water returned to the heat exchange chamber by the water distribution component is evenly sprinkled on the second part of the heat exchange component located above the liquid surface, which can further improve the heat exchange coefficient, thereby improving the heat exchange effect and shortening the time of the heating process. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.
[0022] 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0023] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.
[0024] Figure 1 A schematic diagram of the structure of a steam generating device provided in an embodiment of the present application;
[0025] Figure 2 A schematic diagram of the cross-section structure of a heat exchange container, a heat exchange component and a water distribution component provided in an embodiment of the present application;
[0026] Figure 3 A schematic diagram of the partial structure of a heat exchange container, a heat exchange component and a water replenishment component provided in an embodiment of the present application;
[0027] Figure 4 for Figure 3 A local enlarged structural schematic diagram;
[0028] Figure 5 A flowchart of a method for controlling an evaporation device provided in an embodiment of the present application.
[0029] Description of reference numerals:
[0030] 1. Heat exchange container; 11. Heat exchange chamber; 12. Water supply port; 13. Steam outlet;
[0031] 2. heat exchange component; 21. first part; 22. second part;
[0032] 3. Circulation mechanism; 31. Water inlet end; 32. Water outlet end; 33. Circulation pipeline; 34. First pump body;
[0033] 4. water distribution assembly; 41. buffer tank; 411. first flange structure; 412. overflow hole; 42. liquid distribution tank; 421. liquid distribution hole; 4211. first liquid distribution hole; 4212. second liquid distribution hole; 422. second flange structure;
[0034] 5. Liquid level sensor;
[0035] 6. Temperature sensor;
[0036] 7. Pressure sensor. DETAILED DESCRIPTION
[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0038] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.
[0039] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.
[0040] The present application provides a steam generating device and a control method thereof. The fan coil unit can realize humidification of the supplied air and has a simple structure, which is convenient for subsequent maintenance and overhaul.
[0041] Figure 1 A schematic diagram of the structure of a steam generating device provided in an embodiment of the present application; Figure 2 A schematic diagram of the cross-section structure of a heat exchange container, a heat exchange component and a water distribution component provided in an embodiment of the present application; Figure 3 A schematic diagram of the partial structure of a heat exchange container, a heat exchange component and a water replenishment component provided in an embodiment of the present application; Figure 4 for Figure 3 Schematic diagram of the local enlarged structure at A.
[0042] like Figure 1-Figure 4 As shown, an embodiment of the present application provides a steam generating device, including: a heat exchange container 1, a heat exchange component 2, a circulation mechanism 3 and a water distribution component 4.
[0043] The heat exchange container 1 has a heat exchange chamber 11 and a water replenishment port 12 and a steam outlet 13 communicated with the heat exchange chamber 11 .
[0044] The heat exchange component 2 is disposed in the heat exchange chamber 11 and is used for heating water in the heat exchange chamber 11 .
[0045] The water inlet end 31 of the circulation mechanism 3 is connected to the bottom of the heat exchange container 1 , and the water outlet end 32 of the circulation mechanism 3 is connected to the top of the heat exchange container 1 , so as to pump the water at the bottom of the heat exchange chamber 11 to the top of the heat exchange chamber 11 .
[0046] The water distribution component 4 is arranged in the heat exchange chamber 11, and is used to receive the water output from the water outlet 32 of the circulation mechanism 3, and evenly distribute the received water to the heat exchange component 2 below; wherein the heat exchange component 2 includes a first part 21 located below the water level and a second part 22 located above the water level, and the second part 22 is used to heat the water evenly distributed by the water distribution component 4.
[0047] The steam generating device in the present application is a heat pump type steam generator, which uses the high temperature and high pressure refrigerant discharged from the compressor exhaust port during the heat pump cycle to exchange heat with the water in the heat exchange cavity 11, so as to heat the water and boil it into steam. The heat exchange container 1 is a tank structure, water is added to the heat exchange container 1 through the water supply port 12, and the water vapor generated by the heated water is discharged through the steam outlet 13.
[0048] In the present application, the steam generating device pumps the water at the bottom of the heat exchange chamber 11 to the top of the heat exchange chamber 11 through the circulation mechanism 3, and then sprinkles it into the heat exchange chamber 11 again through the water distribution component 4, so as to realize the circulation of water, thereby avoiding the phenomenon of uneven water temperature and powder layer during the heating process; and the water returned to the heat exchange chamber 11 through the water distribution component 4 is evenly sprinkled on the second part 22 of the heat exchange component 2 located above the liquid surface, which can further improve the heat transfer coefficient, thereby improving the heat exchange effect and shortening the time of the heating process.
[0049] In the related art, the process of water being heated, boiled and vaporized in the steam generator can be simplified into the heating process and the evaporation process. In the heating process, the temperature of the water continues to rise to the saturation temperature corresponding to the saturation pressure in the steam generator. In this process, the water does not boil and does not flow; in the evaporation process, after reaching the saturation temperature, it continues to absorb heat and evaporates to become water vapor at 100°C or above. In the heating process, the water temperature is uneven, and stratification is likely to occur. In addition, the heat exchange tube cannot take into account the evaporation process and the heating process at the same time, resulting in insufficient heat transfer coefficient between the water in the shell side of the heat exchanger and the refrigerant in the heat exchange tube, which greatly increases the time spent in the heating process.
[0050] In the embodiment of the present application, when the water in the heat exchange chamber 11 is heated by the heat exchange component 2, the water is driven to circulate through the circulation mechanism 3, so that the water can be heated evenly and the phenomenon of water temperature stratification can be avoided. The heat exchange component 2 includes a first part 21 located below the liquid surface and a second part 22 located above the liquid surface, wherein the first part 21 is used to directly heat the water in the heat exchange chamber 11, and the second part 22 is used to heat the water evenly distributed by the water distribution component 4. The heat exchange component 2 can take into account the evaporation process and the heating process, improve the heat exchange coefficient between water and the refrigerant in the heat exchange component 2, thereby improving the heat exchange efficiency and shortening the heating process.
[0051] Specifically, the steam generating device in the present application can directly generate high-temperature and high-pressure water vapor. After the water in the heat exchange chamber 11 is heated and evaporated, the air pressure in the heat exchange chamber 11 can be increased, and then the boiling point of the water is increased, directly generating high-temperature and high-pressure water vapor. Compared with the atomization flash and forced spraying on the market, the present application does not require additional boosting equipment, nor does it require nozzles and other structures. The structure is simpler, avoiding the situation where the nozzle is blocked by scale, and the reliability of use is higher.
[0052] In some embodiments, the water distribution assembly 4 has a buffer tank 41 , which can buffer water output from the water outlet 32 so that part of the heat exchange assembly 2 is located on the water level and forms the second part 22 .
[0053] In the present application, the water level in the heat exchange chamber 11 initially covers all the heat exchange components 2. At this time, there is only the first part 21, but no second part 22. When the water circulates through the circulation mechanism 3, a part of the water will be buffered in the buffer groove 41 of the water distribution component 4, thereby causing the water level at the bottom of the heat exchange chamber 11 to drop, and part of the heat exchange components 2 emerge above the liquid level, forming the second part 22 that can directly exchange heat for the sprinkled water.
[0054] Specifically, the water sprinkled onto the heat exchange component 2 by the water distribution component 4 forms a uniformly flowing film of water on the heat exchange component 2, thereby enhancing the heat transfer coefficient on the water side and shortening the heating process time. After being heated, part of the water evaporates into gas, and part of it slowly merges into the water in the heat exchange chamber 11.
[0055] Optionally, when water is directly added to the heat exchange chamber 11 through the water replenishment port 12 , the amount of water in the heat exchange chamber 11 can be controlled so that a portion of the heat exchange component 2 is located above the liquid level to form a second portion 22 .
[0056] In some embodiments, the water distribution component 4 also includes a liquid distribution groove 42 arranged below the buffer groove 41, and the liquid distribution groove 42 is used to receive the water overflowing from the buffer groove 41. The liquid distribution groove 42 is evenly distributed with liquid distribution holes 421, and the liquid distribution groove 42 sprays water to the heat exchange component 2 through the liquid distribution holes 421.
[0057] In the present application, the water in the buffer tank 41 overflows and enters the liquid distribution tank 42 below, and water is sprinkled on the heat exchange component 2 below through the uniformly distributed liquid distribution holes 421 on the liquid distribution tank 42, so as to achieve uniform water sprinkling, thereby enhancing the heat exchange coefficient between the water and the heat exchange component 2 and shortening the heating process time. Moreover, the present application can directly generate high-temperature and high-pressure water vapor without the aid of additional boosting equipment.
[0058] In some embodiments, the cache slot 41 is horizontally arranged, and a first flange structure 411 is arranged on the outer side of the cache slot 41. The first flange structure 411 extends along the length direction of the heat exchange chamber 11. An overflow hole 412 is arranged on the first flange structure 411. The water in the cache slot 41 overflows into the liquid distribution slot 42 through the overflow hole 412.
[0059] In the present application, by setting the buffer slot 41 horizontally, the water entering the buffer slot 41 can be spread in the horizontal plane, and the water is intercepted by the first flange structure 411 on both sides, so as to achieve the purpose of caching water in the buffer slot 41. The water in the buffer slot 41 flows out through the overflow hole 412, so that the water is evenly distributed along the length direction of the heat exchange chamber 11. The water distribution tank below can receive the water overflowing from the overflow hole 412 in each part along the length direction of the heat exchange chamber 11, and then sprinkle it to the heat exchange component 2 below through the liquid distribution hole 421. The sprinkled water can effectively cover the heat exchange component 2 on the liquid surface.
[0060] Specifically, the present application achieves uniform water sprinkling through the design of the buffer tank 41 and the liquid distribution tank 42, and there is no need to use a booster device to spray water at high pressure.
[0061] In the present application, the water in the buffer tank 41 flows out through the overflow holes 412 on the first flange structures 411 on both sides, achieving uniform longitudinal distribution of the water, that is, along the length direction of the heat exchange chamber 11. The liquid distribution holes 421 on the liquid distribution tank 42 are distributed in a matrix to achieve lateral distribution of the water, that is, in the width direction of the heat exchange chamber 11.
[0062] The number and size of the liquid distribution holes 421 can be set according to the actual water flow rate and the size of the heat exchange container 1. One buffer slot 41 and one liquid distribution slot 42 can be set, or one buffer slot 41 and multiple liquid distribution slots 42 can be set to achieve uniform water spraying; multiple buffer slots 41 and multiple liquid distribution slots 42 can also be set, and each buffer slot 41 corresponds to one liquid distribution slot 42 or multiple liquid distribution slots 42 to achieve uniform water spraying.
[0063] In some embodiments, a buffer structure is disposed in the buffer tank 41 , and the buffer structure is disposed below the water outlet end 32 for buffering water outputted from the water outlet end 32 .
[0064] In the present application, water directly falls into the buffer tank 41 through the water outlet 32 of the circulation mechanism 3, and there is no need to set up a spray mechanism, which also saves additional boosting equipment. The water discharged from the water outlet 32 directly falls into the buffer tank 41, which may cause splashing. By setting a buffer structure in the buffer tank 41, the buffer structure is located below the water outlet 32, which can buffer the falling water, and prevent the water from directly rushing out of the buffer tank 41 due to excessively high flow rate when entering the buffer tank 41, thereby ensuring that the water can be evenly distributed in the longitudinal direction.
[0065] Specifically, the buffer structure can be provided with a sponge in the buffer tank 41, and the falling water falls on the sponge to prevent splashing. When the water in the sponge is oversaturated, it will release water to the buffer tank 41. A groove can be provided on the top of the sponge, and the water output from the water outlet 32 directly impacts the groove, which can further buffer the water and prevent the water from splashing outside the buffer tank 41.
[0066] Optionally, the buffer structure can also be a concave-convex structure in the buffer groove 41. The water output from the water outlet 32 falls on the concave-convex structure, which can disperse the water. The water splashing in different directions can offset each other, and the situation of water splashing to the outside of the buffer groove 41 can also be significantly reduced.
[0067] In some embodiments, the liquid distribution groove 42 is horizontally arranged, and a second flange structure 422 is arranged on the outer side of the liquid distribution groove 42 . The second flange structure 422 extends along the length direction of the heat exchange cavity 11 .
[0068] In the present application, by setting a second flange structure 422 on the outside of the liquid distribution groove 42, and the liquid distribution groove 42 is set horizontally, it is possible to avoid the situation where the water in the liquid distribution groove 42 flows down directly through the two sides, and the liquid distribution groove 42 can also play a certain role in storing liquid, so that a thin layer of water can exist in the liquid distribution groove 42, and then the water is evenly sprinkled through the liquid distribution hole 421, and the water is evenly sprinkled on the heat exchange component 2 below. In this way, the heat exchange coefficient between water and the heat exchange component 2 is improved, the heat exchange effect is improved, and the heating process time is shortened.
[0069] In some embodiments, the liquid distribution holes 421 include a first liquid distribution hole 4211 disposed at the bottom of the liquid distribution tank 42 and a second liquid distribution hole 4212 disposed on the second flange structure 422 .
[0070] In the present application, the liquid distribution holes 421 include a first liquid distribution hole 4211 and a second liquid distribution hole 4212. The first liquid distribution holes 4211 are evenly distributed on the bottom of the liquid distribution groove 42, and the second liquid distribution holes 4212 are arranged on the second flange structure 422. When the amount of water is large, liquid can be distributed through the second liquid distribution holes 4212, thereby ensuring the effect of uniform liquid distribution under different water amounts.
[0071] In some embodiments, a liquid level sensor 5 is also included. The liquid level sensor 5 detects the liquid level of water in the heat exchange chamber 11 and is used to control the initial water volume in the heat exchange chamber 11 .
[0072] In the present application, the liquid level of the water in the heat exchange chamber 11 can be detected by the liquid level sensor 5 to control the initial water volume in the heat exchange chamber 11. When water is added to the heat exchange chamber 11 through the water replenishment port 12, the liquid level sensor 5 stops replenishing water into the heat exchange chamber 11 when it detects that the liquid level has reached the set liquid level, so that the initial water volume in the heat exchange chamber 11 can be accurately controlled.
[0073] Specifically, the liquid level sensor 5 is located above the heat exchange component 2, that is, when the liquid level in the heat exchange chamber 11 just completely covers the heat exchange component 2, stop adding water to the heat exchange chamber 11. When the water is subsequently circulated through the circulation mechanism 3, the buffer tank 41 can buffer part of the water, so that the liquid level in the heat exchange chamber 11 drops, and part of the heat exchange component 2 leaks out for heating the sprinkler water.
[0074] In a specific embodiment, during the heating process of water, that is, during the process of raising the water temperature to the saturation temperature corresponding to the preset pressure, the water is circulated and evenly sprinkled. Since the water at the bottom of the heat exchange chamber 11 is continuously pumped out to the top of the heat exchange chamber 11, the flow of shell-side water is promoted, and the uneven water temperature and stratification are reduced. The water is evenly sprinkled on the surface of the heat exchange component 2 and forms a flowing film of water, which can improve the temperature rise of the water, strengthen the heat transfer coefficient on the water side, and shorten the heating process time. When the water temperature rises to the saturation temperature corresponding to the preset pressure, the water in the heat exchange chamber 11 has entered the boiling heat exchange state of the evaporation process, and begins to boil to produce water vapor, including the water in the buffer tank 41 is also in a boiling state.
[0075] As the evaporation process proceeds, the water in the heat exchange chamber 11 is continuously reduced, and water is added to the heat exchange chamber 11 through the water replenishment port 12. The added water is at the bottom of the heat exchange chamber 11. At this time, the circulation mechanism 3 is started to pump the water just added to the heat exchange chamber 11 to the top of the heat exchange chamber 11 in time and circulate it in the buffer tank 41 to prevent the newly added low-temperature water from affecting the water temperature in the entire heat exchange chamber 11. Then, the newly added water is evenly distributed to the heat exchange component 2 below in the form of overflow sprinkling, forming a flowing film of water on the heat exchange component 2, which can heat the water to a higher temperature. Part of the water directly evaporates into gas, and part of the water flows into the water below. Because the water is heated to a higher temperature, the impact on the water temperature in the heat exchange chamber 11 is reduced, and the water heating process can be completed quickly later.
[0076] In some embodiments, the steam generating device further includes: a temperature sensor 6 for detecting the temperature of water in the heat exchange chamber 11 ; and a pressure sensor 7 for detecting the pressure in the heat exchange chamber 11 .
[0077] In the present application, the temperature sensor 6 detects the temperature of the water in the heat exchange chamber 11, and the pressure sensor 7 detects the pressure in the heat exchange chamber 11. Specifically, the detection end of the temperature sensor 6 is located at the bottom of the heat exchange chamber 11, and the detection end of the pressure sensor 7 is located at the top of the heat exchange chamber 11. By real-time detection of the temperature of the water in the heat exchange chamber 11 and the pressure in the heat exchange chamber 11, the temperature and pressure in the heat exchange chamber 11 can be detected at any time, and the detected temperature information and pressure information can be sent to the controller. The controller can obtain the corresponding saturation temperature under the pressure, and then the start and stop of the circulation mechanism 3 can be accurately controlled. When the water temperature is lower than the saturation temperature under the pressure, the circulation mechanism 3 is started to circulate and evenly sprinkle the water to achieve a rapid increase in the water temperature; when the water temperature reaches the saturation temperature under the pressure, the circulation mechanism 3 is shut down to carry out the evaporation process of the water.
[0078] In some embodiments, the circulation mechanism 3 includes: a circulation pipeline 33 having a water inlet end 31 and a water outlet end 32 ; and a first pump body 34 disposed on the circulation pipeline 33 for pumping water from the water inlet end 31 to the water outlet end 32 .
[0079] In the present application, one end of the circulation pipeline 33 is the water inlet end 31 connected to the bottom of the heat exchange chamber 11, and the other end is the water outlet end 32 connected to the top of the heat exchange chamber 11. The first pump body 34 is used to provide water pumping pressure. Because both ends of the circulation pipeline 33 are connected to the heat exchange chamber 11, the requirements for the first pump body 34 are not high. The first pump body 34 only needs to complete the water pumping and does not need to provide additional pressure for the water.
[0080] In the related art, when water vapor is generated by flash evaporation, it needs to be done under a slightly negative pressure condition, and high-temperature and high-pressure water vapor cannot be directly generated. Moreover, the water needs to be pressurized in the form of high-pressure spray atomization. However, it is not suitable for directly generating high-pressure and high-temperature water vapor, because the interior of the heat exchange chamber 11 in the present application is in a high-pressure state, which will place higher requirements on the water pump and easily cause scale to clog the nozzle. Therefore, the present application adopts this form of evenly distributing liquid by sprinkling, which can directly generate high-temperature and high-pressure water vapor, and there is no need to additionally pressurize the water, which has a simple structure and reduces the cost of subsequent maintenance.
[0081] In some embodiments, the heat exchange assembly 2 includes a plurality of heat exchange tubes, and the plurality of heat exchange tubes are extended along the length direction of the heat exchange cavity 11 .
[0082] In the present application, a plurality of heat exchange tubes extend along the length direction of the heat exchange chamber 11, and the distribution of high-temperature and high-pressure refrigerant in each heat exchange tube is the same, thereby ensuring uniform heating of water.
[0083] Specifically, the compressor generates high-temperature and high-pressure refrigerant gas which enters the heat exchange tube and exchanges heat with the water in the heat exchange chamber 11 to heat the water, and the refrigerant returns to the compressor after becoming liquid. The external circulation of the refrigerant is not described in detail here.
[0084] The steam generating device pumps the water at the bottom of the heat exchange chamber 11 to the top of the heat exchange chamber 11 through the circulation mechanism 3, and then sprinkles it into the heat exchange chamber 11 again through the water distribution component 4, so as to realize the circulation of water, thereby avoiding the phenomenon of uneven water temperature and powder layer during the heating process; and the water returned to the heat exchange chamber 11 through the water distribution component 4 is evenly sprinkled on the second part 22 of the heat exchange component 2 located above the liquid surface, which can further improve the heat transfer coefficient, thereby improving the heat exchange effect and shortening the time of the heating process.
[0085] Specifically, the water replenishment port 12 in the present application is connected to the second pump body through a water replenishment pipeline, and external water is added into the heat exchange chamber 11 through the second pump body, thereby achieving water addition and replenishment inside the heat exchange chamber 11.
[0086] Figure 5 A flowchart of a method for controlling an evaporation device provided in an embodiment of the present application.
[0087] like Figure 5 As shown, the embodiment of the present application provides a control method for the above-mentioned steam generating device, comprising the following steps:
[0088] Step S1, the first part 21 of the heat exchange component 2 heats the water in the heat exchange chamber 11;
[0089] Step S2, the circulation mechanism 3 drives the water at the bottom of the heat exchange chamber 11 to the top of the heat exchange chamber 11, and evenly distributes it into the heat exchange chamber 11 through the water distribution component 4;
[0090] Step S3: the second part 22 of the heat exchange component 2 heats the water evenly distributed by the water distribution component 4.
[0091] In the present application, the water in the heat exchange chamber 11 is heated by the first part 21 of the heat exchange component 2. The first part 21 of the heat exchange component 2 is the part below the water level. Since the amount of water in this part is large, the heating effect on the water is poor. The water at the bottom of the circulation mechanism 3 is pumped to the top of the heat exchange chamber 11 and evenly distributed by the water distribution component 4. The evenly distributed water is heated by the second part 22 of the heat exchange component 2. The second part 22 of the heat exchange component 2 is in contact with the flowing film water for heat exchange, which can improve the heating effect on the water, raise the water to a higher temperature, and improve the heat transfer coefficient. A part of the water is directly heated to the evaporation state to become water vapor, and the other part of the water is also raised to a higher temperature and then merged into the water below, which improves the heat exchange efficiency and shortens the time of the heating process.
[0092] In some embodiments, the water distribution assembly 4 has a buffer tank 41, and the steam generating device further includes a liquid level sensor 5, which is used to detect the liquid level of water in the heat exchange chamber 11; the control method further includes:
[0093] Step S4, detecting the liquid level of water in the heat exchange chamber 11 by the liquid level sensor 5, thereby controlling the initial water volume in the heat exchange chamber 11;
[0094] Step S5, the buffer tank 41 buffers the water output from the water outlet 32 so that part of the heat exchange component 2 is located above the liquid level of the water.
[0095] In the present application, the initial water volume in the heat exchange chamber 11 is controlled by the liquid level sensor 5, and then when the circulation mechanism 3 pumps the water to the buffer tank 41 to cache part of the water, the water level in the heat exchange chamber 11 can be automatically controlled to ensure that part of the heat exchange component 2 is located above the liquid surface, forming a second part 22 that can heat the sprinkled water. It is convenient to control the liquid level, and later on, part of the heat exchange component 2 can leak out above the liquid surface.
[0096] In some embodiments, the steam generating device further includes a temperature sensor 6 and a pressure sensor 7, wherein the temperature sensor 6 is used to detect the temperature of water in the heat exchange chamber 11, and the pressure sensor 7 is used to detect the pressure in the heat exchange chamber 11; the control method further includes:
[0097] Step S6, when the temperature of the water in the heat exchange chamber 11 is lower than the saturation temperature corresponding to the preset steam pressure, the circulation mechanism 3 circulates the water in the heat exchange chamber 11;
[0098] Step S7: When the temperature of the water in the heat exchange chamber 11 reaches the saturation temperature corresponding to the preset steam pressure, the circulation mechanism 3 stops circulating the water in the heat exchange chamber 11.
[0099] In the present application, by detecting the temperature of the water in the heat exchange chamber 11 and the air pressure of the heat exchange chamber 11, the saturation temperature of the water under the pressure can be obtained, and then the operation of the circulation mechanism 3 can be accurately controlled. When the temperature of the water is lower than the saturation temperature under the pressure, the circulation mechanism 3 is in operation, and the water is circulated and sprinkled to achieve rapid heating of the water and shorten the duration of the heating process. When the temperature of the water reaches the saturation temperature under the pressure or is higher than the saturation temperature under the pressure, the water has entered the evaporation process. At this time, all the water in the heat exchange chamber 11 has reached the boiling heat exchange state in the evaporation process and begins to generate steam. At this time, the circulation mechanism 3 can be stopped. When the water is replenished later or the water temperature is lower than the saturation temperature, the circulation mechanism 3 is started again to ensure that no matter when, as long as it is in the water heating process, the water can be circulated and sprinkled, thereby ensuring the efficiency of the heating process and shortening the time of the heating process.
[0100] In a specific embodiment:
[0101] Step S4, detecting the liquid level of water in the heat exchange chamber 11 by the liquid level sensor 5, thereby controlling the initial water volume in the heat exchange chamber 11;
[0102] Step S1, the first part 21 of the heat exchange component 2 heats the water in the heat exchange chamber 11;
[0103] Step S6, when the temperature of the water in the heat exchange chamber 11 is lower than the saturation temperature corresponding to the preset steam pressure, the circulation mechanism 3 circulates the water in the heat exchange chamber 11;
[0104] Step S2, the circulation mechanism 3 drives the water at the bottom of the heat exchange chamber 11 to the top of the heat exchange chamber 11, and evenly distributes it into the heat exchange chamber 11 through the water distribution component 4;
[0105] Step S5, the buffer tank 41 buffers the water output from the water outlet 32 so that part of the heat exchange component 2 is located above the liquid level of the water;
[0106] Step S3, the second part 22 of the heat exchange component 2 heats the water evenly distributed by the water distribution component 4;
[0107] Step S7: When the temperature of the water in the heat exchange chamber 11 reaches the saturation temperature corresponding to the preset steam pressure, the circulation mechanism 3 stops circulating the water in the heat exchange chamber 11.
[0108] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.
[0109] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.
[0110] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.
Claims
1. A steam generating device, characterized in that: include: A heat exchange container (1) having a heat exchange chamber (11) and a water replenishment port (12) and a steam outlet (13) communicated with the heat exchange chamber (11); A heat exchange component (2) is arranged in the heat exchange chamber (11) and is used to heat water in the heat exchange chamber (11); a circulation mechanism (3), wherein a water inlet end (31) of the circulation mechanism (3) is in communication with the bottom of the heat exchange container (1), and a water outlet end (32) of the circulation mechanism (3) is in communication with the top of the heat exchange container (1), and is used to pump water at the bottom of the heat exchange chamber (11) to the top of the heat exchange chamber (11); as well as A water distribution component (4) is arranged in the heat exchange chamber (11) and is used to receive water output from the water outlet (32) of the circulation mechanism (3) and evenly distribute the received water to the heat exchange component (2) below; The heat exchange component (2) comprises a first part (21) located below the water level and a second part (22) located above the water level, wherein the second part (22) is used to heat the water evenly distributed by the water distribution component (4).
2. The steam generating device according to claim 1, characterized in that: The water distribution assembly (4) has a buffer groove (41), and the buffer groove (41) can buffer the water output from the water outlet (32), so that part of the heat exchange assembly (2) is located on the water liquid level and forms the second part (22).
3. The steam generating device according to claim 2, characterized in that: The water distribution assembly (4) further comprises a liquid distribution trough (42) arranged below the buffer trough (41), the liquid distribution trough (42) being used to receive water overflowing from the buffer trough (41), the liquid distribution trough (42) being evenly distributed with liquid distribution holes (421), and the liquid distribution trough (42) sprays water onto the heat exchange assembly (2) through the liquid distribution holes (421).
4. The steam generating device according to claim 3, characterized in that: The buffer groove (41) is arranged horizontally, and a first flange structure (411) is arranged on the outer side of the buffer groove (41), and the first flange structure (411) extends along the length direction of the heat exchange chamber (11). An overflow hole (412) is arranged on the first flange structure (411), and water in the buffer groove (41) overflows into the liquid distribution groove (42) through the overflow hole (412).
5. The steam generating device according to claim 3, characterized in that: A buffer structure is provided in the buffer groove (41), and the buffer structure is provided below the water outlet (32) and is used for buffering water outputted from the water outlet (32).
6. The steam generating device according to claim 3, characterized in that: The liquid distribution groove (42) is arranged horizontally, and a second flange structure (422) is arranged on the outer side of the liquid distribution groove (42), and the second flange structure (422) extends along the length direction of the heat exchange cavity (11).
7. The steam generating device according to claim 6, characterized in that: The liquid distribution holes (421) include a first liquid distribution hole (4211) arranged at the bottom of the liquid distribution groove (42) and a second liquid distribution hole (4212) arranged on the second flange structure (422).
8. The steam generating device according to claim 2, characterized in that: It also comprises a liquid level sensor (5), wherein the liquid level sensor (5) detects the liquid level of water in the heat exchange chamber (11) and is used to control the initial amount of water in the heat exchange chamber (11).
9. The steam generating device according to claim 8, characterized in that: The steam generating device further comprises: a temperature sensor (6) for detecting the temperature of water in the heat exchange chamber (11); and A pressure sensor (7) is used to detect the pressure in the heat exchange chamber (11).
10. The steam generating device according to claim 1, characterized in that: The circulation mechanism (3) comprises: a circulation pipeline (33), the circulation pipeline (33) having the water inlet end (31) and the water outlet end (32); and The first pump body (34) is arranged on the circulation pipeline (33) and is used for pumping water from the water inlet end (31) to the water outlet end (32).
11. The steam generating device according to claim 1, characterized in that: The heat exchange assembly (2) comprises a plurality of heat exchange tubes, and the plurality of heat exchange tubes are extended along the length direction of the heat exchange cavity (11).
12. A method for controlling a steam generating device according to any one of claims 1 to 11, characterized in that: The following steps are involved: The first part (21) of the heat exchange component (2) heats the water in the heat exchange chamber (11); The circulation mechanism (3) drives the water at the bottom of the heat exchange chamber (11) to the top of the heat exchange chamber (11), and evenly distributes the water into the heat exchange chamber (11) through the water distribution component (4); The second part (22) of the heat exchange component (2) heats the water evenly distributed by the water distribution component (4).
13. The control method according to claim 12, characterized in that: The water distribution assembly (4) has a buffer tank (41), the steam generating device further comprises a liquid level sensor (5), and the liquid level sensor (5) is used to detect the liquid level of water in the heat exchange chamber (11); the control method further comprises: The liquid level of water in the heat exchange chamber (11) is detected by a liquid level sensor (5), thereby controlling the initial amount of water in the heat exchange chamber (11); The buffer tank (41) buffers the water output from the water outlet (32) so that part of the heat exchange component (2) is located above the liquid level of the water.
14. The control method according to claim 13, characterized in that: The steam generating device further comprises a temperature sensor (6) and a pressure sensor (7), wherein the temperature sensor (6) is used to detect the temperature of water in the heat exchange chamber (11), and the pressure sensor (7) is used to detect the pressure in the heat exchange chamber (11); the control method further comprises: When the temperature of the water in the heat exchange chamber (11) is lower than the saturation temperature corresponding to the preset steam pressure, the circulation mechanism (3) circulates and transports the water in the heat exchange chamber (11); When the temperature of the water in the heat exchange chamber (11) reaches the saturation temperature corresponding to the preset steam pressure, the circulation mechanism (3) stops circulating the water in the heat exchange chamber (11).