Fluid heating device, hydraulic module and heating and ventilation equipment

Abstract

The invention discloses a fluid heating device, a hydraulic module and heating and ventilation equipment, and the fluid heating device comprises a cavity shell assembly, a heating body, an exhaust valve and a flow guide structure; a heating cavity is formed in the cavity shell assembly, a liquid inlet, a liquid outlet and an exhaust port are formed in the cavity shell assembly at intervals, and the liquid inlet, the liquid outlet and the exhaust port all communicate with the heating cavity; the heating body is connected with the cavity shell assembly and used for heating liquid flowing through the heating cavity. The exhaust valve is connected with the cavity shell assembly and is arranged at the exhaust port; the flow guide structure is arranged in the heating cavity and used for disturbing liquid flowing from the liquid inlet to the liquid outlet so that at least part of bubbles carried in the liquid can be separated out and discharged through the exhaust valve. According to the technical scheme, the separation efficiency of the gas contained in the fluid heated in the fluid heating device can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of HVAC systems, and in particular to a fluid heating device, a hydraulic module and HVAC equipment. Background Art

[0002] When traditional air source heat pump water heaters are used for heating in cold areas in winter, the low temperature heating efficiency of air source heat pump water heaters is affected due to the low temperature, and the capacity is greatly reduced, which cannot meet people's needs, thus limiting the popularization and application of such equipment in the area. It is not economically feasible to solve this problem with higher power equipment.

[0003] In the related technology, by connecting a small electric heating water tank in the water circuit, the small electric heating water tank can heat water that does not reach the set temperature, thereby supplementing the heat exchange capacity of the water side at low temperatures. This solution is less affected by the ambient temperature, has a higher thermal efficiency under low temperature conditions, and can ensure customer comfort.

[0004] However, since the electric heating small water tank has a certain spatial volume and is equipped with an electric heating wire with a high surface temperature, if gaseous flammable refrigerants such as R290 leak into the water and are transmitted to the electric heating small water tank, timely separation is required to ensure that there is no risk of combustion or explosion in the electric heating small water tank. How to improve the exhaust efficiency of the electric heating small water tank has become an urgent problem to be solved. Summary of the invention

[0005] The embodiments of the present application provide a fluid heating device, a hydraulic module, and HVAC equipment, which can improve the separation efficiency of the gas contained in the fluid heated in the fluid heating device.

[0006] In the first aspect, an embodiment of the present application provides a fluid heating device, which includes a cavity shell assembly, a heating body, an exhaust valve and a guide structure; a heating cavity is formed in the cavity shell assembly, and a liquid inlet, a liquid outlet and an exhaust port are arranged at intervals, and the liquid inlet, the liquid outlet and the exhaust port are all connected to the heating cavity; the heating body is connected to the cavity shell assembly, and is used to heat the liquid flowing through the heating cavity; the exhaust valve is connected to the cavity shell assembly, and is arranged at the exhaust port; the guide structure is arranged in the heating cavity, and is used to disturb the liquid flowing from the liquid inlet to the liquid outlet, so that at least part of the bubbles carried in the liquid can be precipitated and discharged by the exhaust valve.

[0007] In some embodiments, the guide structure includes a plurality of guide plates, which are arranged at intervals in the heating chamber along the direction of liquid flow from the liquid inlet to the liquid outlet, and the plurality of guide plates and the cavity wall of the heating chamber cooperate to define a guide channel, which is used to guide the liquid from the liquid inlet to the liquid outlet, wherein the guide channel extends in a spiral shape.

[0008] In some embodiments, the guide plate is connected to the cavity wall of the heating cavity, the plate surfaces of the guide plate opposite to each other in the thickness direction are planes, and the plate surfaces of the guide plate are perpendicular to the central axis of the heating cavity.

[0009] In some embodiments, the orthographic projections of two adjacent guide plates along the extension direction of the central axis of the heating chamber are partially overlapped;

[0010] Alternatively, two adjacent guide plates are staggered in their orthographic projection along the extension direction of the central axis of the heating chamber.

[0011] In some embodiments, a mounting hole is provided on the guide plate, and the heating body is a heating tube, one end of the heating tube is fixed to the cavity shell assembly, and the other end is passed through the mounting hole and connected to the guide plate.

[0012] In some of the embodiments, the guide plate is connected to the cavity wall of the heating cavity, and a plurality of the guide plates are arranged at intervals along a spiral line surrounding the central axis of the heating cavity.

[0013] In some embodiments, the opposite plate surfaces of the guide plate in the thickness direction are arc surfaces.

[0014] In some embodiments, the heating body is a heating tube; the heating tube is connected to the chamber shell assembly and extends in the extension direction of the central axis of the heating chamber;

[0015] Wherein, a plurality of guide plates surround the outer side of the heating tube.

[0016] In some embodiments, a plurality of heating tubes are provided, and the plurality of heating tubes are arranged around the central axis of the heating chamber.

[0017] In some of the embodiments, the flow guide structure further includes a spoiler protrusion, and a plurality of the spoiler protrusions are arranged at intervals on opposite plate surfaces of the flow guide plate in the thickness direction, and the spoiler protrusions are located in the flow guide channel.

[0018] In some embodiments, the spoiler protrusion includes a first end and a second end that are oppositely disposed, the first end is located upstream of the liquid flow direction in the flow guide channel, and the second end is located downstream of the liquid flow direction in the flow guide channel;

[0019] The thickness of the spoiler protrusion increases in a direction from the first end toward the second end.

[0020] In some embodiments, the width of the spoiler protrusion decreases in a direction from the first end toward the second end.

[0021] In some of the embodiments, the plurality of spoiler protrusions on the plate surface of the guide plate are arranged in columns and rows, and the direction of the column arrangement is consistent with the extension direction of the guide channel.

[0022] In some embodiments, the central axes of the liquid inlet and the liquid outlet do not coincide.

[0023] In some embodiments, the chamber shell assembly includes a tank body with an open end and an end cover, wherein the end cover is sealed at the open end and cooperates with the tank body to form the heating chamber;

[0024] The liquid inlet and the liquid outlet are arranged on the tank body, the exhaust port is opened on the end cover, and the liquid inlet is arranged at one end of the tank body close to the end cover, and the liquid outlet is arranged at one end of the tank body away from the end cover.

[0025] In some of the embodiments, the flow guiding structure is arranged at the periphery of the liquid inlet and / or the liquid outlet, and the flow guiding structure is arranged obliquely relative to the central axis of the heating chamber.

[0026] Some of the embodiments further include a heat conductor connected to the outer wall surface of the cavity shell assembly, and the heater is disposed on the heat conductor.

[0027] In a second aspect, an embodiment of the present application provides a hydraulic module, which includes a fluid heating device as described in any one of the above.

[0028] In a third aspect, an embodiment of the present application provides a HVAC device, which includes the hydraulic module as described above.

[0029] Based on the fluid heating device of the embodiment of the present application, a guide structure is arranged in the heating chamber to disturb the liquid flowing from the liquid inlet to the liquid outlet, so as to form turbulence in the heating chamber. Such disturbance helps to separate the bubbles from the liquid and can destroy tiny bubbles. After destroying and aggregating multiple tiny bubbles to form large bubbles, they are convenient for precipitation. In conjunction with the exhaust valve arranged at the exhaust port, at least part of the bubbles carried in the liquid can be precipitated and fully and efficiently discharged through the exhaust valve, thereby improving the gas-liquid separation efficiency, and then improving the exhaust efficiency of the fluid heating device, and reducing the risk of combustion and explosion caused by excessive bubble accumulation in the heating chamber. At the same time, the setting of the guide structure can also improve the uniformity of liquid flow and reduce pressure drop, thereby improving the heat exchange efficiency and stability in the heating chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application 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 application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0031] Figure 1 A partial schematic diagram of the system principle of the HVAC equipment for this application;

[0032] Figure 2 This is a schematic diagram of the three-dimensional structure of an embodiment of the fluid heating device of the present application;

[0033] Figure 3 for Figure 2 A schematic diagram of the exploded structure of the fluid heating device shown in FIG.

[0034] Figure 4 for Figure 2 A schematic cross-sectional view of an embodiment of a fluid heating device is shown in FIG.

[0035] Figure 5 for Figure 2 A cross-sectional structural schematic diagram of another embodiment of a fluid heating device is shown in FIG.

[0036] Figure 6 for Figure 5 A schematic diagram of the structure of the guide plate is shown in FIG.

[0037] Description of Figure Numbers:

[0038] 100, fluid heating device; 110, cavity shell assembly; 111, heating cavity; 112, tank body; 1121, liquid inlet; 1122, liquid outlet; 1123, open mouth; 113, end cover; 1131, exhaust port; 120, heating body; 121, heating tube; 130, exhaust valve; 140, flow guide structure; 141, heat conduction plate; 1411, mounting hole; 1412, plate surface; 142, flow guide channel; 143, spoiler convex part; 1431, first end; 1432, second end; 150, pipe assembly; 151, liquid inlet pipe; 152, liquid outlet pipe; 210, electric control box; 220, working fluid pipe; 230, air cooler; 240, water pump.

[0039] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the present application clearer, the following part will further describe the embodiments of the present application in detail in conjunction with the accompanying drawings.

[0041] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0042] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0044] The present application provides a fluid heating device, a hydraulic module using the fluid heating device, and a HVAC device using the hydraulic module.

[0045] HVAC equipment includes but is not limited to air conditioners, multi-split units, heat pumps, water heaters, swimming pool machines, etc. Taking HVAC equipment with heating medium as working fluid and heating object as water as an example, the HVAC equipment may include a hydraulic module for heating water and an outdoor unit that can be installed outdoors and perform heat exchange with the external environment.

[0046] Figure 1 For a partial schematic diagram of the system principle of the HVAC equipment, please refer to Figure 1 The hydraulic module has a water circulation flow path and a working fluid pipe 220. Working fluid flows in the working fluid pipe 220. The working fluid can be a new working fluid such as R32, R290, CO2, etc. These working fluids have the advantages of high thermal conductivity, large latent heat of evaporation, good fluidity, low delivery pressure, etc. The hydraulic module heats the water by exchanging heat between the working fluid in the working fluid pipe 220 and the water in the water circulation flow path to output water of a set temperature, so as to provide the required hot water to the user end.

[0047] Specifically, the hydraulic module may also include components such as an air cooler 230, a water pump 240, and a fluid heating device 100. The air cooler 230, the fluid heating device 100, and the water pump 240 are connected by water pipes to form a water circulation flow path. The air cooler 230 has two inlets and two outlets, one set of interconnected inlets and outlets for the working fluid pipe 220 to pass through, and the other set of interconnected inlets and outlets for the water medium to pass through. When the water medium flows through the air cooler 230, the working fluid pipe 220 in the air cooler 230 contacts the water, and the working fluid in the working fluid pipe 220 dissipates heat to heat the water in the air cooler 230. The water pump 240 provides power for the water circulation flow. The fluid heating device 100 can be arranged between the air cooler 230 and the water pump 240, that is, the water heated by the air cooler 230 is reheated in the fluid heating device 100 and enters the water pump 240 through the water pipe, and then pumped by the water pump 240 to the required environment, such as the floor heating pipe or the user's domestic water pipe, so as to meet the user's hot water production needs. The hydraulic module of the present application can also be provided with an energy storage water tank in a conventional hydraulic module when having the fluid heating device 100, and the energy storage water tank can be arranged between the air cooler 230 and the fluid heating device 100.

[0048] The outdoor unit may include components such as an evaporator, a compressor, and an expansion valve. The evaporator, the compressor, the air cooler 230, and the expansion valve are connected in a loop in sequence through the working medium pipe 220. When the HVAC equipment is working, the working medium in the evaporator absorbs heat from the air, and the working medium changes from a low-temperature and low-pressure gas to a high-temperature and low-pressure gas; then the high-temperature gas is compressed by the compressor, so that the working medium forms a high-temperature and high-pressure liquid; the high-temperature and high-pressure liquid exchanges heat with the water in the water circulation flow path through the air cooler 230, so that the water temperature in the water circulation flow path increases, and the working medium becomes a low-temperature and high-pressure liquid; the low-temperature and high-pressure liquid is converted into a low-temperature and low-pressure gas through the expansion valve, and then circulates to the evaporator again, thus completing the working medium circulation process.

[0049] In addition, the hydraulic module may also include a fuselage (not shown in the figure) and an electric control box 210. The air cooler 230, the fluid heating device 100, the energy storage water tank, the water pipe and other components may be arranged in the fuselage, and the fuselage is placed indoors, so that the water circulation flow path has a certain cold-proof function, and ensures that the water in the water pipe has a good circulation effect. The electric control box 210 is also arranged in the fuselage of the hydraulic module, and the electric control box 210 is integrated with a power supply system and a control system for supplying power and controlling the operation of each electrical component of the hydraulic module, and at the same time, it is convenient for the centralized setting and maintenance of the circuits, circuit boards and control components in the electric control box 210. A control panel electrically connected to the electric control box 210 may also be provided on the fuselage, so that the user can set parameters and control the working mode of the indoor unit by operating the control panel indoors.

[0050] In the related art, when the fluid heating device 100 is applied to HVAC equipment, since the fluid heating device 100 has a certain spatial volume and is provided with an electric heating wire with a relatively high surface temperature, if gaseous flammable refrigerants such as R290 leak into the liquid and are transmitted to the fluid heating device 100, timely separation is required to ensure that there is no risk of combustion or explosion in the fluid heating device 100. How to improve the exhaust efficiency of the fluid heating device 100 has become an urgent problem to be solved.

[0051] To solve the above problems, please refer to Figures 1 to 3 The present application proposes a fluid heating device 100 . In an embodiment of the present application, the fluid heating device 100 includes a chamber shell assembly 110 , a heating body 120 , an exhaust valve 130 , and a flow guide structure 140 .

[0052] A heating chamber 111 is formed in the chamber shell assembly 110, and a liquid inlet 1121, a liquid outlet 1122 and an exhaust port 1131 are arranged at intervals. The liquid inlet 1121, the liquid outlet 1122 and the exhaust port 1131 are all connected to the heating chamber 111. The heating body 120 is connected to the chamber shell assembly 110 for heating the liquid flowing through the heating chamber 111. Specifically, the chamber shell assembly 110 includes a tank body 112 with an opening 1123 at one end and an end cover 113. The end cover 113 is sealed at the opening 1123 and cooperates with the tank body 112 to form the heating chamber 111. The liquid inlet 1121 and the liquid outlet 1122 are arranged on the tank body 112, and the exhaust port 1131 is opened on the end cover 113. The external structure of the chamber shell assembly 110 can be roughly cylindrical, curved or square, and the specific structural dimensions can be further limited according to actual installation requirements, which is not limited in this application.

[0053] The external structure of the chamber shell assembly 110 of the present application is cylindrical, and the outer wall surface of the chamber shell assembly 110 is arc-shaped, which is conducive to saving installation space and can withstand greater pressure. When the fluid heating device 100 is placed in the installation space, the central axis of the heating chamber 111 is perpendicular to the horizontal ground. At this time, the central axis direction of the heating chamber 111 is parallel to the up and down direction of the fluid heating device 100, and the liquid outlet 1122 is arranged at one end of the tank body 112 close to the end cover 113, and the liquid inlet 1121 is arranged at one end of the tank body 112 away from the end cover 113, that is, the liquid inlet 1121 and the liquid outlet 1122 are respectively arranged at intervals in the up and down direction of the fluid heating device 100, thereby realizing the liquid entering from the top and exiting from the bottom. With such an arrangement, the gas that enters the heating chamber 111 along with the liquid from the liquid inlet 1121 will rise faster and accumulate in the upper space of the heating chamber 111. For example, the liquid can be water, and the gas can be the gaseous refrigerant in the system, which makes it easier for bubbles to be discharged from the exhaust port 1131, thereby improving the exhaust efficiency and reducing the risk of combustion and explosion caused by the accumulation of flammable gaseous refrigerant in the heating chamber 111. At the same time, due to the effect of gravity, the liquid can flow from the liquid inlet 1121 located above to the liquid outlet 1122 below, and flow out from the liquid outlet 1122, thereby greatly improving the liquid discharge efficiency of the fluid heating device 100.

[0054] Of course, the liquid outlet 1122 can also be set at the end of the tank body 112 close to the end cover 113, and the liquid inlet 1121 can be set at the end of the tank body 112 away from the end cover 113, so as to realize the bottom-in and top-out of the liquid. Cold water flows into the heating chamber 111 from the liquid inlet 1121 located at the bottom. After being heated in the heating chamber 111, due to the low density of hot water, it will naturally rise and flow out to the outside from the liquid outlet 1122 located at the top, thus forming a natural convection cycle, which can reduce the mixing of hot and cold water and reduce the heat exchange difference, thereby improving the heating efficiency. After the hot water rises naturally, the heated water is stored in the upper part of the heating chamber 111, which can reduce the loss of heat from the heating chamber 111 and improve the insulation effect.

[0055] The exhaust valve 130 is connected to the chamber shell assembly 110 and is arranged at the exhaust port 1131. The exhaust valve 130 is provided with a rectangular metal mesh structure and an exhaust chamber. The metal mesh structure is used to block the water flow to cause turbulence. The turbulent state causes the speed and pressure of the water flow to change and release bubbles. Bubbles accumulate on the top of the metal mesh due to molecular forces. Bubbles gather at the end of the metal mesh and separate from the metal mesh due to the increase in volume and rise to the exhaust chamber of the exhaust valve 130. The exhaust chamber is further discharged by providing an automatic exhaust valve 130 float, thereby removing the microbubble gas mixed in the liquid from the outside of the fluid heating device 100 to reduce the risk of gas blockage and cavitation.

[0056] The exhaust valve 130 is arranged at the exhaust port 1131. When the heating body 120 heats the liquid in the heating chamber 111, the water vapor in the bubbles evaporates continuously, causing the volume of the bubbles to expand. The buoyancy of the bubbles increases, causing the bubbles to rise to the exhaust port 1131, which is conducive to the exhaust valve 130 to remove the tiny bubbles free in the water and improve the exhaust efficiency. In this way, it can be ensured that there will be no gas accumulation in the fluid heating device 100, thereby reducing the possibility of gas blockage and cavitation, improving the exhaust efficiency and overall stability of the fluid heating device 100, and further helping to maintain the normal operation of the HVAC equipment and extend its service life. In addition, the design of the exhaust valve 130 makes it unaffected by the direction of the water flow, so the exhaust port 1131 can also be opened on the side wall of the chamber shell assembly 110, and the exhaust valve 130 is connected to the side wall of the chamber shell assembly 110 and arranged at the exhaust port 1131, so that adaptive adjustments can be made in a specific installation environment to improve installation flexibility.

[0057] The technical solution of the present application is to set a guide structure 140 in the heating chamber 111 to disturb the liquid flowing from the liquid inlet 1121 to the liquid outlet 1122, so as to form turbulence in the heating chamber 111. Such disturbance helps to separate the bubbles from the liquid and can destroy tiny bubbles. After destroying and aggregating multiple tiny bubbles to form large bubbles, they are convenient for precipitation. In combination with the exhaust valve 130 set at the exhaust port 1131, at least part of the bubbles carried in the liquid can be precipitated and fully and efficiently discharged by the exhaust valve 130, thereby improving the gas-liquid separation efficiency, and further improving the exhaust efficiency of the fluid heating device 100, and reducing the risk of combustion and explosion caused by the accumulation of flammable gaseous refrigerant in the heating chamber 111. At the same time, the setting of the guide structure 140 can also improve the uniformity of liquid flow and reduce pressure drop, thereby improving the heat exchange efficiency and stability in the heating chamber 111.

[0058] Please refer to Figures 2 to 4 In some embodiments, the fluid heating device 100 further includes a tube assembly 150, and the tube assembly 150 includes a liquid inlet pipe 151 and a liquid outlet pipe 152. The liquid inlet pipe 151 and the liquid outlet pipe 152 are both fixedly connected to the chamber shell assembly 110, and the liquid inlet pipe 151 is connected to the heating chamber 111 through the liquid inlet 1121, and the liquid outlet pipe 152 is connected to the heating chamber 111 through the liquid outlet 1122. The tube assembly 150 is made of a material with excellent thermal conductivity, such as stainless steel, aluminum alloy, etc., such that the tube assembly 150 can efficiently absorb the heat generated by the heating body 120, and the tube assembly 150 can also be produced by casting. Of course, the tube assembly 150 can also be made of other materials with higher structural strength and high temperature resistance, and the present application does not limit this. The cross-sectional shape of the tube assembly 150 can be circular, square, polygonal, etc. Figure 4 As exemplarily shown in FIG. 1 , the cross-section of the tube assembly 150 is circular, and its length dimension is greater than its radial dimension.

[0059] In some embodiments, the guide structure 140 includes a plurality of guide plates, which are arranged at intervals in the direction of liquid flow from the liquid inlet 1121 to the liquid outlet 1122 in the heating chamber 111, and the plurality of guide plates and the cavity wall of the heating chamber 111 cooperate to define a guide channel 142, which is used to guide the liquid from the liquid inlet 1121 to the liquid outlet 1122, wherein the guide channel 142 extends in a spiral shape. This arrangement allows the liquid to rotate and flow in the guide channel 142 along the spiral extension direction of the guide channel 142, and generate a vortex in the heating chamber 111, which can change the flow characteristics of the fluid, make the fluid flow more uniform, reduce dead angles and flow stratification, and thus help improve the heat exchange performance of the entire heating chamber 111. The bubbles doped in the liquid are constantly disturbed by the vortex, which makes it easier for the surface tension of the bubbles to be destroyed and ruptured, and then multiple tiny bubbles can merge with each other to form larger bubbles, which are more convenient to be discharged after the bubbles rise to the exhaust port 1131, thereby improving the exhaust efficiency.

[0060] Moreover, within the limited volume of the heating chamber 111, the spirally extending flow channel 142 can also greatly increase the flow length of the liquid. Compared with the design of the straight flow channel 142, the spirally extending flow channel 142 allows the liquid to continuously change direction while flowing. This continuous change of direction increases the contact area between the liquid and the flow channel 142, which is beneficial for the flow channel 142 to destroy the bubbles in the liquid multiple times, thereby improving the generation efficiency of large bubbles and further improving the exhaust efficiency. The secondary flow generated by the spiral flow channel 142 can be perpendicular to the axial flow, which helps to reduce the boundary layer thickness of the fluid flow and enhance the heat transfer characteristics, thereby increasing the heat exchange efficiency of the fluid heating device 100.

[0061] In addition, the central axes of the liquid inlet 1121 and the liquid outlet 1122 may be arranged so as not to overlap, that is, in the direction of the central axis of the heating chamber 111 and in the direction perpendicular to the central axis of the heating chamber 111, the projections of the central axes of the liquid inlet 1121 and the liquid outlet 1122 may not overlap. With such an arrangement, the flow direction and velocity distribution of the liquid may be changed in the process of the liquid flowing out of the liquid outlet 1122 after the liquid enters the heating chamber 111 from the liquid inlet 1121. Compared with the arrangement in which the central axes of the liquid inlet 1121 and the liquid outlet 1122 are parallel to each other, the flow path length of the liquid in the flow direction may be increased, thereby affecting the flow state of the liquid, so that the liquid changes from laminar flow to turbulent flow, and also disturbing and destroying the bubbles mixed in the liquid, facilitating the precipitation of bubbles, improving the exhaust efficiency, and increasing the mixing and heat exchange efficiency of cold and hot liquids.

[0062] It should be noted that the number of guide plates can be multiple or an integrated structure. When multiple guide plates are provided, different vortex effects can be achieved by changing the setting position and angle of a single guide plate. The guide plate with an integrated structure is also easy to install, and the installation errors caused by multiple guide plates are avoided during the actual installation process.

[0063] In a structural form, such as Figure 3 and Figure 4 As shown, the guide plate is connected to the cavity wall of the heating chamber 111, and the plate surface 1412 of the guide plate relative to the thickness direction is a plane, and the plate surface 1412 of the guide plate is perpendicular to the central axis of the heating chamber 111. At this time, when the liquid enters the heating chamber 111 from the liquid inlet 1121 and flows out from the liquid outlet 1122, the liquid will impact the plate surface 1412 of the guide plate, and the guide plate will block the liquid, which will change the flow direction of the liquid, so that the flow direction of the liquid is in the form of a zigzag extension, and the effect of vortex can also be achieved, so that the flow direction of the liquid is constantly changed during the flow process, and because the liquid is blocked by the plate surface 1412 of the guide plate, the bubbles mixed in the liquid are impacted and destroyed during the continuous flow, so that they can be better precipitated and finally discharged by the exhaust valve 130, thereby improving the exhaust efficiency. Since the plate surface 1412 relative to the guide plate in the thickness direction is flat, the fluid flow can be guided more effectively to ensure that the liquid does not change its velocity due to the shape of the plate surface 1412 when flowing through the guide plate, thereby ensuring the smoothness of the flow and preventing turbulence, thereby optimizing the flow field distribution.

[0064] Specifically, the orthographic projections of two adjacent guide plates along the extension direction of the central axis of the heating chamber 111 are partially overlapped. Therefore, in the liquid flow direction from the liquid inlet 1121 to the liquid outlet 1122 in the heating chamber 111, the overlapping part of the orthographic projections of the two adjacent guide plates can block part of the liquid, while the other part of the liquid will be blocked by the overlapping parts of the other two groups of adjacent guide plates after flowing and extending along the central axis direction, so that the flow direction of the liquid relative to the central axis of the heating chamber 111 is constantly changed, increasing the flow process length, and the liquid forms a vortex along the central axis of the heating chamber 111. After the vortex is formed, the bubbles impact the plate surface 1412 of the guide plate due to the obstruction of the guide plate, and are more easily broken and eventually precipitated into large bubbles, which is more convenient for the exhaust valve 130 to discharge, thereby improving the exhaust efficiency.

[0065] It should be noted that the area of ​​the overlapping part of the orthographic projection of two adjacent guide plates along the extension direction of the central axis of the heating chamber 111 can be one-half, one-quarter or one-eighth of the area of ​​the plate surface 1412 of the guide plate. In the embodiment of the present application, the area of ​​the overlapping part of the orthographic projection of two adjacent guide plates is one-quarter of the area of ​​the plate surface 1412. This can ensure that the guide plate can block the liquid in the direction of the central axis of the heating chamber 111, avoid the liquid rushing directly from the leakage between the two adjacent guide plates and affecting the vortex effect, thereby ensuring the exhaust efficiency, and the number of guide plates arranged in this way can be relatively small, thereby saving costs.

[0066] Alternatively, two adjacent guide plates are staggered in their projection along the extension direction of the central axis of the heating chamber 111. This can also block the liquid and change the flow direction of the liquid from the liquid inlet 1121 to the liquid outlet 1122, so that the liquid flows in a zigzag manner and forms a spiral-like flow direction along the central axis of the heating chamber 111, thereby ensuring the flow process length and the contact efficiency between the bubbles and the guide plates, thereby ensuring the exhaust efficiency.

[0067] The heating body 120 can be a heating tube 121, a heating film, or the heating body 120 is a tube structure, in which a heating medium (for example, water, refrigerant, etc.) flows. In one embodiment of the present application, the heating body 120 is a heating tube 121, and the heating tube 121 usually has a metal tube as an outer shell (including stainless steel, copper tube), and spiral electric heating alloy wires (nickel-chromium, iron-chromium alloy) are evenly distributed along the central axis of the tube. The gaps are filled and compacted with magnesium oxide sand with good insulation and thermal conductivity, and both ends of the tube are sealed with silicone.

[0068] The guide plate is provided with a mounting hole 1411, and the heating tube 121 is connected to the chamber shell assembly 110, with one end fixed to the chamber shell assembly 110, and the other end passing through the mounting hole 1411 and connected to the guide plate, so that the heating tube 121 can be stably fixed in the chamber shell assembly 110, and the portion of the heating tube 121 located in the heating chamber 111 is connected to the guide plate by passing through the mounting hole 1411, so that the heating tube 121 and the guide plate are kept fixed and tightly connected, and the heating tube 121 will not shake or shift due to the flow and impact of the liquid, and it is also ensured that the heating tube 121 will not shift or detach during transportation and installation, thereby ensuring the stability and safety of use, thereby ensuring the stability and durability of the fluid heating device 100. In addition, the connection between the heating tube 121 and the guide plate can improve the heat conduction efficiency. The guide plate is connected to the heating tube 121 through the mounting hole 1411, which can more effectively transfer heat from the heating tube 121 to the liquid. The guide plate directly contacts the heating tube 121, reducing heat loss and improving heating efficiency. The guide plate guides the liquid to flow along a specific path, which can reduce liquid turbulence and improve liquid flow efficiency. The uniform flow can ensure that all parts of the liquid can be evenly heated during the heating process, thereby improving heat exchange efficiency.

[0069] In another structural form, Figure 5 and Figure 6 As shown, the guide plate is connected to the cavity wall of the heating cavity 111, that is, the guide plate can be an integrated structure with the cavity wall of the heating cavity 111, or can be fixed to the cavity wall of the heating cavity 111 by welding, screwing, etc. Of course, the guide plate can also be connected and fixed to the heating body 120 at one end, and abutted against the cavity wall of the heating cavity 111 at the other end, and the present application does not limit this. A plurality of guide plates are arranged at intervals along a spiral line surrounding the central axis of the heating chamber 111. The spiral line arrangement increases the turbulence of the liquid flow, so that the flow direction of the liquid is consistent with the direction of the spiral line surrounding the central axis of the heating chamber 111, and the irregular and inefficient turbulent fluid is converted into a regular vortex fluid in the heating chamber 111, thereby forming a layered vortex flow state, so that the liquid phase and the gas phase move in a vortex state at the same time, and during the flow process, the contact area between the bubbles and the guide plates is increased, which helps to evenly distribute and move the bubbles in the entire flow channel, so that the bubbles are constantly in contact with the guide plates and broken, and multiple tiny bubbles gradually converge into large bubbles, reducing the aggregation of bubbles in local areas, which is beneficial to the removal of bubbles, thereby greatly improving the gas-liquid separation efficiency and exhaust efficiency.

[0070] In addition, the plate surface 1412 relative to the guide plate in the thickness direction is an arc surface. The arc-surface guide plate can more effectively guide the liquid in the flow direction of the liquid, which helps to be driven when the liquid flows. The arc-surface design can reduce the contact area between the bubbles and the guide plate surface, reduce the adhesion of the bubbles, and make it easier for the bubbles to detach from the guide plate surface. The arc-surface guide plate can also increase the gas-liquid contact area, improve the mass transfer efficiency between gas and liquid, and help break tiny bubbles and form larger bubbles, so that the bubbles can be more easily discharged from the water, thereby improving the exhaust efficiency.

[0071] There are multiple heating tubes 121, and the multiple heating tubes 121 are arranged around the central axis of the heating chamber 111. Specifically, the multiple heating tubes 121 are arranged at intervals around the central axis of the heating chamber 111, that is, the multiple heating tubes 121 are connected in parallel on the circuit. Such an arrangement is convenient for individually controlling each of the multiple heating tubes 121, so that according to the use requirements, some or all of the heating tubes 121 can be controlled to start and operate, and the energy utilization rate can be improved while meeting the power requirements. Moreover, when multiple heating tubes 121 are connected in parallel, when one of the heating tubes 121 is abnormal, the other heating tubes 121 can also operate to ensure the continuous working output of the HVAC equipment, and the reliability is higher. Of course, when multiple heating tubes 121 are connected in parallel, the heating tubes 121 have a larger operating space in assembly and are easier to assemble.

[0072] In other configurations, when the heating tube 121 extends in the direction of the central axis of the heating chamber 111, multiple heating tubes 121 are spliced ​​end to end. That is, multiple heating tubes 121 of the present application are spliced ​​end to end to form an electrical series connection. Through such a configuration, on the one hand, multiple heating tubes 121 cover a larger area of ​​the central axis of the heating chamber 111 on the flow path of the liquid, so that sufficient heating can be performed. In the case where multiple heating tubes 121 are connected in series, it is relatively simple to connect the electricity.

[0073] Among them, the heating tube 121 is provided with multiple and extends in the extension direction of the central axis of the heating chamber 111, and multiple guide plates surround the outside of the heating tube 121. The guide plates can guide the liquid to flow around the heating tube 121 evenly in the flow direction, which can reduce the accumulation of bubbles in local areas, cause more obstacles to the liquid in its flow direction, help break the bubbles so that the bubbles can be discharged quickly, and improve the exhaust efficiency. In addition, the guide plates surrounding the outside of the heating tube 121 can fully guide the liquid to the heating tube 121 after vortexing, increase the surface area of ​​the liquid in contact with the heating tube 121, thereby improving the heat exchange efficiency, and can also reduce the accumulation of bubbles caused by temperature difference.

[0074] In another arrangement, the heating tube 121 is in a spiral structure and is arranged around the central axis of the heating chamber 111. The plurality of heating tubes 121 are arranged in sequence along the extension path of the liquid, and two adjacent heating tubes 121 are at least partially nested. In this embodiment, the plurality of heating tubes 121 are arranged around the central axis of the heating chamber 111 and are spaced apart from each other, and extend in the extension direction of the central axis of the heating chamber 111. Moreover, the plurality of heating tubes 121 in this embodiment can be electrically arranged in series or in parallel, thereby achieving a more thorough coverage of the central axis of the heating chamber 111 on the flow path of the liquid, thereby achieving more sufficient heating, and also forming a certain obstruction to the liquid in the flow direction of the liquid from the liquid inlet 1121 to the liquid outlet 1122, thereby enhancing the bubble breaking effect, and further improving the exhaust efficiency. Moreover, when the plurality of heating tubes 121 are arranged in parallel, the control is more flexible.

[0075] In some embodiments, the guide structure 140 also includes a spoiler protrusion 143. A plurality of spoiler protrusions 143 are arranged at intervals on the plate surface 1412 opposite to each other in the thickness direction of the guide plate. The spoiler protrusions 143 are located in the guide channel 142 and can disturb the liquid in the process of the liquid flowing through the guide channel 142, thereby interfering with tiny bubbles doped in the liquid, destroying the surface tension of the bubbles, and merging multiple tiny bubbles into larger bubbles, thereby facilitating the bubbles to rise and gather at the upper part of the heating chamber 111, and then be discharged through the exhaust valve 130, thereby improving the exhaust efficiency.

[0076] The spoiler protrusion 143 can also effectively disturb the fluid in the guide channel 142 to avoid stratification. It can be understood that when the stratification of the liquid in the guide channel 142 is more obvious, for example, the liquid close to the wall of the guide channel 142 is subject to friction resistance, and the flow rate will be lower than the flow rate of the liquid in the middle of the guide channel 142. In this way, the heat of the heating body 120 is difficult to transfer to the liquid in the middle position of the guide channel 142, resulting in uneven heating. The setting of the spoiler protrusion 143 can form turbulence, thereby minimizing the stratification phenomenon and making the heating more uniform.

[0077] It should be noted that when the plate surface 1412 of the guide plate is perpendicular to the central axis of the heating chamber 111, the spoiler protrusion 143 can be at least provided on the plate surface 1412 of the guide plate on one side facing the liquid inlet 1121; when multiple guide plates are arranged at intervals along the spiral line surrounding the central axis of the heating chamber 111, the spoiler protrusion 143 can also be provided on at least one plate surface 1412 of the guide plate on one side facing the liquid inlet 1121. In this way, the liquid can be first disturbed upstream of the liquid flow direction in the guide channel 142 to ensure that the liquid directly impacts the spoiler protrusion 143. The spoiler protrusion 143 can destroy the surface tension of tiny bubbles doped in the liquid, break multiple tiny bubbles and aggregate them into larger bubbles, and then flow to the downstream of the liquid flow direction. The spoiler protrusion 143 arranged downstream can further destroy the larger bubbles that have been formed to form larger bubbles, which is convenient for the bubble precipitation and discharge by the exhaust valve 130, thereby improving the exhaust efficiency.

[0078] Specifically, the spoiler protrusion 143 includes a first end 1431 and a second end 1432 that are relatively arranged. The first end 1431 is located upstream of the liquid flow direction in the guide channel 142, and the first end 1431 is located downstream of the liquid flow direction in the guide channel 142. The thickness dimension L1 of the spoiler protrusion 143 is increased in the direction from the first end 1431 toward the second end 1432, and the width dimension L2 of the spoiler protrusion 143 is decreased in the direction from the first end 1431 toward the second end 1432. It should be noted that the thickness dimension L1 of the spoiler protrusion 143 refers to the direction perpendicular to the plate surface 1412 of the guide plate on the plate surface 1412 of the guide plate where the spoiler protrusion 143 is formed, namely, the thickness direction of the spoiler protrusion 143; the width dimension L2 of the spoiler protrusion 143 refers to the direction parallel to the plate surface 1412 of the guide plate and perpendicular to the liquid flow direction in the guide channel 142 on the plate surface 1412 of the guide plate where the spoiler protrusion 143 is formed, namely, the width direction of the spoiler protrusion 143.

[0079] In this way, in the direction of liquid flow, when the liquid is located in the flow guide channel 142 and flows through the spoiler convex portion 143, in the process of the liquid flowing from the first end 1431 to the second end 1432, due to the gradual increase and decrease of the thickness, the flow velocity of the liquid will change and the flow velocity will gradually increase in the process. When the liquid flows through the second end 1432 of the spoiler convex portion 143, since the second end 1432 is relatively thicker and narrower, and the flow velocity of the liquid at this time is greater than that of the upstream, the surface tension of the tiny bubbles in the liquid is destroyed, thereby the tiny bubbles are broken, and due to the guide channel 142, the liquid flows through the second end 1432 of the spoiler convex portion 143. The multiple spoiler protrusions 143 on the plate surface 1412 of the flow plate are arranged in columns and rows, and the direction of the column arrangement is consistent with the extension direction of the guide channel 142. This is arranged in accordance with the flow direction of the liquid to reduce the flow resistance of the liquid. The multiple tiny bubbles broken at the adjacent spoiler protrusions 143 can gather and form larger bubbles, and then be broken again during the flow process and reorganized into larger bubbles, and finally rise to the exhaust port 1131 and be discharged by the exhaust valve 130. This greatly reduces the influence of the spoiler protrusions 143 on the resistance of the liquid flow and greatly increases the exhaust efficiency.

[0080] It can be understood that, in addition to the above-mentioned forms, the structure of the spoiler protrusion 143 can also be a convex hull, a boss or a conical structure, etc. For example, the spoiler protrusion 143 can be a plurality of spoiler ribs, and the spoiler ribs are located in the guide channel 142. The extension direction of the spoiler ribs is the same as the flow direction of the liquid. The liquid can also be disturbed in the process of flowing through the guide channel 142, thereby facilitating the precipitation of bubbles and improving the exhaust efficiency. The present application does not impose any restrictions on this.

[0081] In some embodiments, the flow guiding structure 140 is arranged at the periphery of the liquid inlet 1121 and the liquid outlet 1122, or at the periphery of one of the liquid inlet or the liquid outlet 1122, and the flow guiding structure 140 is arranged obliquely relative to the central axis of the heating chamber 111, so that when the liquid enters the heating chamber 111 from the liquid inlet 1121 and when the liquid is discharged from the liquid outlet 1122, the flow path of the liquid is not parallel to the central axis of the heating chamber 111, and the flow length of the liquid can also be increased to fully precipitate the bubbles. At this time, the flow guiding structure 140 can be a plate-like structure or a spiral structure. For example, the flow guiding structure 140 is a spiral structure that spirals along the central axis of the heating chamber 111 and is arranged at the periphery of the liquid inlet 1121. When the liquid enters the heating chamber 111 from the liquid inlet 1121, the spiral structure changes the flow direction to a spiral line rotating along the central axis of the heating chamber 111, thereby forming a vortex of the liquid, thereby achieving the above-mentioned exhaust effect.

[0082] Please refer again Figures 2 to 4In some embodiments, a heat conductor is also included. The heat conductor is connected to the outer wall surface of the cavity shell assembly 110. The heater 120 is arranged on the heat conductor. The heat conductor can be made of heat-conducting metal materials such as aluminum and stainless steel, or can be made of non-metallic materials. The heat conductor is formed on the outer surface of the cavity shell assembly 110 by die-casting or casting, which is convenient for production and manufacturing and improves the integrity of the structure.

[0083] By disposing a heat conductor outside the cavity shell assembly 110 and disposing the heating body 120 on the heat conductor, the heat generated by the heating body 120 is conducted to the cavity shell assembly 110 through the heat conductor, so as to heat the liquid in the heating cavity 111, and since the heating body 120 is not in direct contact with the liquid, the heating body 120 is not easily corroded by the liquid during the heating process, and when the heating body 120 is not in direct contact with the liquid, it is not easily impacted by sudden changes in temperature, and effective buffering can be achieved, so that the heating body 120 is not easily deformed.

[0084] In addition, by arranging the heat conductor and the heater 120 outside the cavity shell assembly 110, the solution of the present application also omits the sealing structure corresponding to the power connection end of the heater 120 on the cavity shell assembly 110, which can also reduce the difficulty of assembling the entire fluid heating device 100, and there is no possibility of leakage at the outlet of the power connection end due to corrosion or the like due to long-term use, which also makes the reliability of the entire fluid heating device 100 higher. Of course, when the heat conductor and the heater 120 are arranged together outside the cavity shell assembly 110, the structural strength of the cavity shell assembly 110 is also enhanced, making the overall structural strength higher.

[0085] In order to further improve safety, when the heat conductor is connected to the outer wall of the cavity shell assembly 110 and the heating body 120 is arranged on the heat conductor, the fluid heating device 100 further includes a protective cover, which is sleeved on the outside of the cavity shell assembly 110 and the heat conductor, and the protective cover and the cavity shell assembly 110 cooperate to form a protective cavity, and the heat conductor is located in the protective cavity. The protective cover can be made of fireproof material, and the setting of the protective cover can prevent the fluid heating device 100 from affecting other components in the hydraulic module in the event of abnormal dry burning or excessive temperature.

[0086] In order to improve the convenience of assembly, the protective cover of this embodiment includes a cover box and a cover cover, and the cover box and the cover cover are detachably connected as one body. Among them, the cover box and the cover cover can be detachably connected by means of buckles, screws, etc.

[0087] Furthermore, the present application may also cover the outer wall surface and the inner wall surface of the protective cover, or one of the outer wall surface or the inner wall surface, with an insulation layer. That is, the present application may cover the outer wall surface of the protective cover alone with an insulation layer, or arrange an insulation layer on the inner wall surface of the protective cover alone, or cover both the inner wall surface and the outer wall surface of the protective cover at the same time, wherein the material of the insulation layer may be selected from, for example, sponge, foam, etc. Through such an arrangement, the protective cover can achieve the protective effect, reduce energy loss, and reduce the heat radiation outward during the operation of the fluid heating device 100, affecting other components, which has multiple advantages.

[0088] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0089] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A fluid heating device, characterized in that: include: A chamber shell assembly, in which a heating chamber is formed and a liquid inlet, a liquid outlet and an exhaust port are arranged at intervals, wherein the liquid inlet, the liquid outlet and the exhaust port are all connected to the heating chamber; A heating body, connected to the chamber shell assembly, and used to heat the liquid flowing through the heating chamber; An exhaust valve connected to the chamber shell assembly and arranged at the exhaust port; as well as The flow guiding structure is arranged in the heating chamber and is used to disturb the liquid flowing from the liquid inlet to the liquid outlet so as to precipitate at least part of the bubbles carried in the liquid and discharge them through the exhaust valve.

2. The fluid heating device according to claim 1, characterized in that: The guide structure includes a plurality of guide plates, which are arranged at intervals in the heating chamber along the liquid flow direction from the liquid inlet to the liquid outlet. The plurality of guide plates and the cavity wall of the heating chamber cooperate to define a guide channel, and the guide channel is used to guide the liquid from the liquid inlet to the liquid outlet, wherein the guide channel extends in a spiral shape.

3. The fluid heating device according to claim 2, characterized in that: The guide plate is connected to the cavity wall surface of the heating cavity, the plate surfaces of the guide plate opposite to each other in the thickness direction are planes, and the plate surfaces of the guide plate are perpendicular to the central axis of the heating cavity.

4. The fluid heating device according to claim 3, characterized in that: The orthographic projections of two adjacent guide plates along the extension direction of the central axis of the heating chamber are partially overlapped; Alternatively, two adjacent guide plates are staggered in their orthographic projection along the extension direction of the central axis of the heating chamber.

5. The fluid heating device according to claim 3, characterized in that: The guide plate is provided with a mounting hole, the heating body is a heating tube, one end of the heating tube is fixed to the chamber shell assembly, and the other end is passed through the mounting hole and connected to the guide plate.

6. The fluid heating device according to claim 2, characterized in that: The guide plate is connected to the cavity wall of the heating cavity, and a plurality of the guide plates are arranged at intervals along a spiral line surrounding the central axis of the heating cavity.

7. The fluid heating device according to claim 6, characterized in that: The opposite plate surfaces of the guide plate in the thickness direction are arc surfaces.

8. The fluid heating device according to claim 6, characterized in that: The heating body is a heating tube; the heating tube is connected to the chamber shell assembly and extends in the extension direction of the central axis of the heating chamber; Wherein, a plurality of guide plates surround the outer side of the heating tube.

9. The fluid heating device according to claim 8, characterized in that: A plurality of heating tubes are provided, and the plurality of heating tubes are arranged around the central axis of the heating chamber.

10. The fluid heating device according to any one of claims 2 to 9, characterized in that: The flow guide structure further includes a spoiler convex portion. A plurality of the spoiler convex portions are arranged at intervals on opposite plate surfaces of the flow guide plate in the thickness direction. The spoiler convex portions are located in the flow guide channel.

11. The fluid heating device according to claim 10, characterized in that: The flow-disturbing protrusion comprises a first end and a second end which are arranged opposite to each other, wherein the first end is located upstream of the liquid flow direction in the flow guide channel, and the second end is located downstream of the liquid flow direction in the flow guide channel; The thickness of the spoiler protrusion increases in a direction from the first end toward the second end.

12. The fluid heating device according to claim 11, characterized in that: The width of the spoiler protrusion is reduced in a direction from the first end toward the second end.

13. The fluid heating device according to claim 12, characterized in that: The plurality of spoiler protrusions on the plate surface of the guide plate are arranged in columns and rows, and the direction of the column arrangement is consistent with the extension direction of the guide channel.

14. The fluid heating device according to any one of claims 1 to 13, wherein the central axes of the liquid inlet and the liquid outlet do not coincide with each other.

15. The fluid heating device according to claim 14, characterized in that The chamber shell assembly comprises a tank body with an open end and an end cover, wherein the end cover is sealed at the open end and cooperates with the tank body to form the heating chamber; The liquid inlet and the liquid outlet are arranged on the tank body, the exhaust port is opened on the end cover, and the liquid inlet is arranged at one end of the tank body close to the end cover, and the liquid outlet is arranged at one end of the tank body away from the end cover.

16. The fluid heating device according to any one of claims 1 to 13, characterized in that: The flow guiding structure is arranged at the periphery of the liquid inlet and / or the liquid outlet, and the flow guiding structure is arranged obliquely relative to the central axis of the heating chamber.

17. The fluid heating device according to any one of claims 1 to 13, characterized in that: It also includes a heat conductor, which is connected to the outer wall surface of the cavity shell component, and the heating body is arranged on the heat conductor.

18. A hydraulic module, characterized in that: Comprising a fluid heating device as claimed in any one of claims 1 to 17.

19. A HVAC equipment, characterized in that: Comprising a hydraulic module as claimed in claim 18.

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