Fluid heating device, hydraulic module and heating and ventilation equipment

Abstract

The utility model discloses a fluid heating device, a hydraulic module and heating and ventilation equipment. The fluid heating device comprises a pipe body, a heat conductor and a heating body. The pipe body is provided with a fluid channel, and a liquid inlet and a liquid outlet which are communicated with the fluid channel; the heat conductor is connected to the outer wall surface of the pipe body; the heating body is arranged on the heat conductor and used for heating fluid flowing through the fluid channel. According to the technical scheme, the stability of long-time operation of the electric heating water tank in the heat pump system can be effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of HVAC equipment, and in particular to a fluid heating device, a hydraulic module using the fluid heating device, and HVAC equipment using the hydraulic module. 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 they 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] Of course, there is also a solution of connecting a small electric heating water tank in the water circuit. This solution is less affected by the ambient temperature and has high thermal efficiency in very cold conditions. In the related art, for example, patent CN206648152U discloses an electric heating tank, including a tube body and a heater. The tube body has a first end and a second end along a first direction. The tube body is provided with a water inlet and a water outlet. The tube body, the water inlet and the water outlet form a closed water system. The heater is arranged in the tube body and connected to the water system. The first end is provided with a power terminal, and the heater is fixedly connected to the power terminal. The electric heating tube of this electric heating tank is directly inserted into the water. The heating tube is often corroded by water and subjected to hot and cold shocks, which can easily cause the heating tube to crack, leading to leakage problems and affecting the user's safety. Utility Model Content

[0004] The embodiments of the present application provide a fluid heating device, a hydraulic module and HVAC equipment, which can effectively improve the stability of long-term operation of an electric heating water tank in a heat pump system.

[0005] In a first aspect, an embodiment of the present application provides a fluid heating device, comprising a tube body, a heat conductor and a heating body. The tube body has a fluid channel and a liquid inlet and a liquid outlet connected to the fluid channel; the heat conductor is connected to the outer wall surface of the tube body; and the heating body is arranged on the heat conductor to heat the fluid flowing through the fluid channel.

[0006] In one embodiment, the heating body comprises a plurality of sub-heating bodies, and the plurality of sub-heating bodies are arranged in sequence on the heat conductor along an extension path of the fluid channel.

[0007] In one embodiment, the heat conductor is disposed around the tube body, the sub-heating body is a spiral structure and is disposed around the tube body, and a plurality of the sub-heating bodies are arranged in sequence and spaced apart on the heat conductor along an extension path of the fluid channel.

[0008] In one embodiment, the heat conductor is arranged around the tube body, the sub-heating body is a spiral structure and is arranged around the tube body, and a plurality of sub-heating bodies are arranged in sequence along the extension path of the fluid channel on the heat conductor and are spliced ​​end to end.

[0009] In one embodiment, the heat conductor is arranged around the tube body, the sub-heating body is in a spiral structure and is arranged around the tube body, a plurality of the sub-heating bodies are arranged in sequence on the heat conductor along the extension path of the fluid channel, and two adjacent sub-heating bodies are at least partially nested.

[0010] In one embodiment, the plurality of sub-heating bodies are on the same straight line away from the outer edge of the tube body;

[0011] And / or, the plurality of sub-heating bodies are located on the same straight line close to the inner edge of the tube body.

[0012] In one embodiment, the sub-heating body is embedded in the heat conductor and there is a gap between the sub-heating body and the outer wall of the tube body;

[0013] Alternatively, the sub-heating body is embedded in the heat conductor and at least partially exposed on the inner surface of the heat conductor and in contact with the outer wall surface of the tube body.

[0014] In one embodiment, the sub-heating body is an electric heating tube or an electric heating film, and the sub-heating body includes an electrical connection terminal;

[0015] The center lines of the power connection ends of all the sub-heating bodies are located on a plane.

[0016] In one embodiment, the tube body includes a main body and two joint parts, the fluid channel is formed in the main body, the two joint parts are respectively connected to two ends of the main body along the extension direction of the fluid channel, and the liquid inlet and the liquid outlet are respectively formed in the two joint parts;

[0017] The joint part protrudes outward from the outer side wall of the main body, and the heating body is connected between the two joint parts.

[0018] In one embodiment, the main body is further provided with a pressure relief opening communicating with the fluid channel.

[0019] In one embodiment, the heat conductor is made of aluminum alloy.

[0020] In one embodiment, a mounting portion is further provided on the heat conductor, and the mounting portion is used to fix the temperature control module.

[0021] In one embodiment, a protective cover is further included, wherein the protective cover is sleeved on the outside of the tube body and the heat conductor, and the protective cover cooperates with the tube body to form a protective cavity, and the heat conductor is located in the protective cavity.

[0022] In one embodiment, the protective cover comprises a cover box and a cover lid, and the cover box and the cover lid are detachably connected as one body.

[0023] In one embodiment, the protection cavity is closed at one end and open at the other end in the extension direction of the fluid channel.

[0024] In one embodiment, the outer wall surface and / or the inner wall surface of the protective cover is also covered with a thermal insulation layer.

[0025] In one embodiment, a flow-disturbing structure is further provided on the inner wall of the fluid channel, and the flow-disturbing structure disturbs the fluid flowing through the fluid channel.

[0026] In one embodiment, the flow-disturbing structure includes flow-disturbing ribs or flow-disturbing grooves arranged on the inner wall surface of the fluid channel.

[0027] In one embodiment, the spoiler rib or the spoiler groove extends spirally around an extension path of the fluid channel.

[0028] In one embodiment, the thickness of the spoiler rib in the radial direction of the fluid channel is d1, and the radius of the fluid channel is d2, satisfying the relationship 0.4≤d1 / d2≤0.95.

[0029] In a second aspect, an embodiment of the present application provides a hydraulic module, comprising the fluid heating device as described above.

[0030] In a third aspect, an embodiment of the present application provides a HVAC equipment, including a fluid heating device as described above, or including a hydraulic module as described above.

[0031] Based on the fluid heating device, hydraulic module and HVAC equipment of the embodiment of the present application, a heat conductor is arranged outside the pipe body and the heating body is arranged on the heat conductor. In the process of heating the liquid flowing through the fluid channel of the pipe body, the heat generated by the heat conductor is transferred to the pipe body through the heat conductor to heat the liquid. Compared with the traditional design in which the heating body is directly arranged in the fluid channel, the scheme of the present application is not easily corroded by the liquid during the heating process because the heating body is not in direct contact with the liquid. In addition, when the heating body is not in direct contact with the liquid, it is not easily impacted by sudden changes in temperature, and effective buffering can be achieved. In this way, the heating body is not easily deformed.

[0032] In addition, by arranging the heat conductor and the heater outside the tube body, compared with the solution of placing the heater in the fluid channel, the solution of the present application also omits the sealing structure corresponding to the power connection end of the heater on the tube body. This can also reduce the difficulty of assembling the entire fluid heating device, 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. This also makes the reliability of the entire fluid heating device higher. Of course, when the heat conductor and the heater are arranged together on the outside of the tube body, it also helps to enhance the structural strength of the tube body, making the overall structural strength higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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.

[0034] Figure 1 A partial schematic diagram of the system principle of the HVAC equipment for this application;

[0035] Figure 2 for Figure 1 A schematic diagram of the internal structure of a hydraulic module in a HVAC device, showing part of the structure;

[0036] Figure 3 for Figure 2 A side view of the structure in;

[0037] Figure 4 for Figure 2 A top view of the structure in FIG.

[0038] Figure 5 This is a schematic diagram of the three-dimensional structure of an embodiment of the fluid heating device of the present application;

[0039] Figure 6 for Figure 5 A schematic front view of the structure of the fluid heating device;

[0040] Figure 7 for Figure 6 Middle AA section view;

[0041] Figure 8 for Figure 5 A schematic diagram of the exploded structure of the fluid heating device;

[0042] Fig. 9 for Figure 5 A side structural schematic diagram of a fluid heating device;

[0043] Fig.10 for Figure 5 Another side view structural schematic diagram of the fluid heating device in

[0044] Fig.11 for Figure 5 A top view of the fluid heating device in FIG.

[0045] Fig.12 This is a schematic cross-sectional structural diagram of a fluid heating device according to another embodiment of the present application;

[0046] Fig.13 This is a schematic structural diagram of a fluid heating device according to another embodiment of the present application.

[0047] Description of Figure Numbers:

[0048] 210. Electric control box; 220. Working fluid pipe; 230. Heat exchanger; 240. Water pump; 250. Fuselage; 100. Fluid heating device; 110. Tube body; 111. Main body; 112. Joint; 113. Fluid channel; 114. Liquid inlet; 115. Liquid outlet; 116. Pressure relief opening; 117. Connecting part; 118. Flow disturbance structure; 120. Heat conductor; 121. Mounting part; 130. Heating element; 131. Sub-heating element; 132. Power connection terminal; 140. Protective cover; 141. Cover box; 142. Cover.

[0049] 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

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] The present application provides a fluid heating device, a hydraulic module using the fluid heating device, and a HVAC device using the hydraulic module.

[0055] 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. Figure 1 For a partial schematic diagram of the system principle of the HVAC equipment, please refer to Figure 1 The indoor unit includes a hydraulic module, which has a water circulation flow path and a working fluid pipe 220. The working fluid pipe 220 has a working fluid flowing therein. The working fluid may be a new working fluid such as R32, R290, CO□, 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 at a set temperature.

[0056] Specifically, the hydraulic module may also include components such as a heat exchanger 230, a water pump 240, and a fluid heating device 100. The heat exchanger 230, the fluid heating device 100, and the water pump 240 are connected by water pipes to form a water circulation flow path. The heat exchanger 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 heat exchanger 230, the working fluid pipe 220 in the heat exchanger 230 contacts the water, and the working fluid in the working fluid pipe 220 dissipates heat to heat the water in the heat exchanger 230. The water pump 240 provides power for the water circulation flow. The fluid heating device 100 can be arranged between the heat exchanger 230 and the water pump 240, that is, the water heated by the heat exchanger 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, etc., so as to meet the user's heating needs. The fluid heating device 100 plays an auxiliary role in the heating of the heat exchanger 230 in a low temperature environment, so that the water temperature can be increased, a better heating effect is achieved, and the energy efficiency of the unit is improved. The hydraulic module of the present application can also be provided with an energy storage water tank in a conventional hydraulic module when having a fluid heating device 100, and the energy storage water tank can be arranged between the heat exchanger 230 and the fluid heating device 100.

[0057] The outdoor unit may include components such as an evaporator, a compressor, and an expansion valve. The evaporator, the compressor, the heat exchanger 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 heat exchanger 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 changes 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.

[0058] Also, see Figures 2 to 4The hydraulic module also includes a body 250 and an electric control box 210. The heat exchanger 230, the fluid heating device 100, the energy storage water tank, the water pipe and other components can be arranged in the body 250, and the body 250 is placed indoors, so that the water circulation flow path has a certain cold-proof function, ensuring that the water in the water pipe has a good circulation effect. The electric control box 210 is also arranged in the body 250 of the hydraulic module. 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 to centrally set and maintain the circuits, circuit boards and control components in the electric control box 210. A control panel electrically connected to the electric control box 210 can also be provided on the body 250, so that the user can set parameters and control the working mode of the indoor unit by operating the control panel indoors.

[0059] The applicant has found that when the existing fluid heating device 100 is used in HVAC equipment, the electric heating tube is usually directly inserted into the tube body 110, that is, it is directly in contact with the water flow. The heating tube is often corroded by water and subjected to hot and cold shocks. After long-term operation, the heating tube is prone to cracking, resulting in leakage problems, which affects the user's safety.

[0060] The fluid heating device 100 provided in the present application and the hydraulic module and HVAC equipment equipped with the fluid heating device 100 are intended to improve the stability of the long-term operation of the electric heating water tank.

[0061] To achieve this, please refer to Figures 5 to 7 The fluid heating device 100 of the embodiment of the present application comprises a tube body 110, a heat conductor 120 and a heater 130. The tube body 110 has a fluid channel 113 and a liquid inlet 114 and a liquid outlet 115 connected to the fluid channel 113; the heat conductor 120 is connected to the outer wall surface of the tube body 110; the heater 130 is arranged on the heat conductor 120, and is used to heat the fluid flowing through the fluid channel 113.

[0062] Among them, the tube body 110 is made of a material with excellent thermal conductivity, for example, it can be stainless steel, aluminum alloy, etc. made of metal materials, so that the tube body 110 can efficiently absorb the heat generated by the heating body 130, and the tube body 110 can also be produced by casting. Of course, the tube body 110 can also be made of other materials with high structural strength and high temperature resistance, and this application is not limited to this. The cross-sectional shape of the tube body 110 can be circular, square, polygonal, etc. As shown in the figure, the cross-section of the tube body 110 is circular, and its length dimension is greater than the radial dimension. The heat conductor 120 is arranged on the outer wall surface of the tube body 110, specifically fixed on the outer peripheral surface. Of course, in addition to being fixed on the outer peripheral surface, the heat conductor 120 can also have a part fixed on the end face of the tube body 110 at the same time. While achieving rapid transfer of heat generated by the heater 130 to the tube body 110, the heat conductor 120 also fixes the heater 130 and the tube body 110 into a whole. For example, the heat conductor 120 may be made of an aluminum alloy, which has excellent thermal conductivity and can efficiently transfer the heat generated by the heater 130 to the tube body 110. The heat conductor 120 can also be easily fixed to the tube body 110 by die-casting.

[0063] Therefore, the present application sets the heat conductor 120 outside the tube body 110 and sets the heating body 130 on the heat conductor 120. During the heating process of the liquid in the fluid channel 113 flowing through the tube body 110, the heat generated by the heat conductor 120 is transferred to the tube body 110 through the heat conductor 120 to heat the liquid. Compared with the traditional design in which the heating body 130 is directly set in the fluid channel 113, the scheme of the present application is not easily corroded by the liquid during the heating process because the heating body 130 is not in direct contact with the liquid. In addition, when the heating body 130 is not in direct contact with the liquid, it is not easily affected by sudden changes in temperature and can achieve effective buffering, so that the heating body 130 is not easily deformed.

[0064] In addition, by arranging the heat conductor 120 and the heating body 130 outside the tube body 110, compared with the solution of placing the heating body 130 in the fluid channel 113, the solution of the present application also omits the sealing structure corresponding to the power connection end 132 of the heating body 130 on the tube body 110. This 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 132 due to corrosion or the like due to long-term use. This also makes the reliability of the entire fluid heating device 100 higher. Of course, when the heat conductor 120 and the heating body 130 are arranged together on the outside of the tube body 110, it also helps to enhance the structural strength of the tube body 110, making the overall structural strength higher.

[0065] Please refer to Figure 7and Figure 8 In one embodiment, the heating body 130 includes a plurality of sub-heating bodies 131, and the plurality of sub-heating bodies 131 are sequentially arranged on the heat conductor 120 along the extension path of the fluid channel 113. By such an arrangement, the liquid is continuously heated while flowing through the fluid channel, thereby improving the heating efficiency.

[0066] In order to further improve the heating effect, the heat conductor 120 is arranged around the tube body 110, the sub-heating body 131 is a spiral structure and is arranged around the tube body 110, and multiple sub-heating bodies 131 are arranged in sequence on the heat conductor 120 along the extension path of the fluid channel 113. The sub-heating body 131 of the present application can be an electric heating tube, an electric heating film, or the heating body 131 is a tube structure, and the heating medium (for example, water, refrigerant, etc.) flows inside it. The electric heating tube is usually made of a metal tube as the shell (including stainless steel, copper tube), and the spiral electric heating alloy wire (nickel-chromium, iron-chromium alloy) is evenly distributed along the central axis of the tube. The gap is filled with compacted magnesium oxide sand with good insulation and thermal conductivity, and the two ends of the tube mouth are sealed with silicone. In the embodiment of the present application, when the sub-heating body 131 is set as a spiral structure, on the one hand, the liquid flowing through the fluid channel 113 can be heated in all directions in the circumferential direction, and the heating is more balanced and the heating efficiency is higher. Of course, it also has a similar effect when a heating film is used. In addition, when the spiral structure is set, since the bending radius of the sub-heating body 131 as the heating tube is larger, the deformation, cracking and other adverse effects of the sub-heating body 131 can be reduced. It can be seen that compared with the existing solution of directly inserting the heating tube into the tube body 110, in which the shape of the heating tube is usually a "U" shape design, the solution of the present application has the advantage of a more stable structure.

[0067] Based on the above configuration, the plurality of sub-heating bodies 131 of the present application can be arranged at intervals in the extension direction of the fluid channel 113 (eg Figure 7 and Figure 8 (shown), that is, multiple sub-heating bodies 131 are connected in parallel on the circuit. This arrangement makes it easy to control each of the multiple sub-heating bodies 131 individually, so that some or all of the sub-heating bodies 131 can be controlled to start and run according to usage requirements. While meeting power requirements, energy utilization can also be improved. Moreover, when multiple sub-heating bodies 131 are connected in parallel, when one of the sub-heating bodies 131 is abnormal, the other sub-heating bodies 131 can also operate to ensure the continuous working output of the HVAC equipment, and the reliability is higher. Of course, when multiple sub-heating bodies 131 are connected in parallel, the sub-heating bodies 131 have a larger operating space during assembly and are easier to assemble.

[0068] In other configurations, multiple sub-heating bodies 131 are sequentially arranged on the heat conductor 120 along the extension path of the fluid channel 113, and are spliced ​​end to end. That is, multiple sub-heating bodies 131 of the present application are spliced ​​end to end to form an electrical series connection. Through such a configuration, on the one hand, multiple sub-heating bodies 131 cover a larger area of ​​the tube body 110 on the flow path of the fluid channel 113, so that sufficient heating can be performed. In the case where multiple sub-heating bodies 131 are connected in series, it is relatively simple to connect the electricity.

[0069] In another configuration, the heat conductor 120 is disposed around the tube body 110, the sub-heating body 131 is in a spiral structure and is disposed around the tube body 110, and a plurality of sub-heating bodies 131 are sequentially arranged on the heat conductor 120 along the extension path of the fluid channel 113, and two adjacent sub-heating bodies 131 are at least partially nested. In this embodiment, the plurality of sub-heating bodies 131 are at least partially overlapped, and the plurality of sub-heating bodies 131 in this embodiment can be electrically arranged in series or in parallel. By at least partially nesting two adjacent sub-heating bodies 131, a more thorough coverage of the tube body 110 on the flow path of the fluid channel 113 is achieved, so that the heating is more sufficient, and in the case where the plurality of sub-heating bodies 131 are arranged in parallel, the control is more flexible.

[0070] In one embodiment, the plurality of sub-heating bodies 131 are on the same straight line away from the outer edge of the tube body 110. In this case, the diameters of the heating tubes of the plurality of sub-heating bodies 131 can be set to be the same or different. When the plurality of sub-heating bodies 131 are on the same straight line away from the outer edge of the tube body 110, the outer surface of the heat conductor 120 carrying the plurality of sub-heating bodies 131 can be made as coplanar as possible. In this way, when the heat conductor 120 is made of aluminum material and is formed on the outer surface of the tube body 110 by die casting or pouring, the inner wall surface of the mold cavity can be made more regular, which is conducive to reducing the difficulty of mold design and demoulding.

[0071] In other embodiments, the present application may also place multiple sub-heating bodies 131 close to the inner edge of the tube body 110 on the same straight line. In this case, the diameters of the heating tubes of the multiple sub-heating bodies 131 may also be set to be the same or different. In this embodiment, when the multiple sub-heating bodies 131 are close to the inner edge of the tube body 110 on the same straight line, when the heat conductor 120 is made of aluminum material and is formed on the outer surface of the tube body 110 by die casting or pouring, during the assembly process, the multiple sub-heating bodies 131 have a common pre-fixed reference, which facilitates assembly positioning.

[0072] In addition, the present application can also place multiple sub-heating bodies 131 away from the outer edge of the tube body 110 in the same straight line, and also place multiple sub-heating bodies 131 close to the inner edge of the tube body 110 in the same straight line. In this case, the sub-heating bodies 131 can use heating tubes with the same diameter. Through such a setting, it has the dual advantages of the above two settings, which will not be repeated here.

[0073] Furthermore, in any of the above embodiments, the present application can also embed the sub-heating body 131 inside the heat conductor 120 and have a gap between it and the outer wall surface of the tube body 110. Through such an arrangement, the sub-heating body 131 in the form of a heating tube can be pre-fixed outside the tube body 110 and placed in a mold, and then the material of the heat conductor 120 is injected into the mold in the form of die-casting or pouring. The material of the heat conductor 120 can flow into the gap between the sub-heating body 131 and the outer wall surface of the tube body 110. After solidification and molding, the heat conductor 120 firmly combines multiple sub-heating bodies 131 with the tube body 110 as a whole, so that the final structure has a high structural stability.

[0074] Of course, in order to fully conduct the heat generated by the sub-heating body 131 to the tube body 110, the present application can also embed the sub-heating body 131 in the heat conductor 120, and at least partially expose the inner surface of the heat conductor 120 and contact the outer wall surface of the tube body 110. The molding method of the heat conductor 120 of this embodiment is similar to that of the previous embodiment. The difference of this embodiment is that part of the sub-heating body 131 directly contacts the tube body 110, so that the heat conduction is faster and the heating efficiency of the liquid in the tube body 110 is higher.

[0075] It should be noted that in the above-mentioned fixing and forming method of the heat conductor 120 and the sub-heating body 131, the sub-heating body 131 in the form of an electric heating tube will be pre-fixed on the outside of the tube body 110. Therefore, in order to improve the assembly efficiency, the present application may use a snap or a fixing clip to assist in relatively fixing the sub-heating body 131 and the tube body 110 to avoid poor positioning.

[0076] Furthermore, in the above embodiment, each of the multiple sub-heating bodies 131 includes two power terminals 132, wherein the center lines of the power terminals 132 of all the sub-heating bodies 131 are located on a plane. This arrangement is conducive to demolding during the die-casting or casting process of the heat conductor 120. Furthermore, the present application can further arrange the centers of the power terminals 132 of the multiple sub-heating bodies 131 on the same straight line in the same plane, so that the mold closing and demolding operations are easier, which is more conducive to processing and manufacturing.

[0077] It should be noted that the above content describes the case where the heating body 130 is configured as a plurality of sub-heating bodies 131 , and the heating body 130 of the present application may also be a solution in which the plurality of sub-heating bodies 131 as a whole are an electric heating tube.

[0078] In one embodiment, the tube body 110 includes a main body 111 and two joints 112, a fluid channel 113 is formed in the main body 111, the two joints 112 are respectively connected to the two ends of the main body 111 along the extension direction of the fluid channel 113, and a liquid inlet 114 and a liquid outlet 115 are respectively formed in the two joints 112; the joints 112 protrude outward from the outer side wall of the main body 111, and the heating body 130 is connected between the two joints 112. In this embodiment, the main body 111 is a hollow cylindrical shape, and the joints 112 protrude outward along the radial direction of the main body 111. By such a configuration, when the heat conductor 120 is die-cast or cast and fixed to the outside of the tube body 110, it is convenient to use the joints 112 for positioning and clamping, so that the assembly efficiency is higher. Furthermore, the two joints 112 can be arranged on the same side of the main body 111, that is, the two joints 112 are oriented in the same direction. In this way, when the fluid heating device 100 is fixed to the hydraulic module, the pipe body 110 can be conveniently fixed to the corner position of the hydraulic module body 250, and the pipes can be connected on the same side, thereby improving the internal space utilization rate of the hydraulic module.

[0079] In order to improve the reliability of operation, in one embodiment, please refer to Figure 6 , Figure 8 as well as Fig.11 The main body 111 is also provided with a pressure relief opening 116 connected to the fluid channel 113. During operation, when there are many bubbles in the liquid in the heated fluid channel 113 and the liquid pressure is high due to continuous heating, the bubbles can be discharged through the pressure relief opening 116, thereby improving the safety of operation and avoiding the risk of bursting due to excessive pressure. It is understandable that a pressure relief valve is usually installed on the pressure relief opening 116, and the pressure relief valve automatically opens to relieve pressure when the liquid pressure in the fluid channel 113 is too high.

[0080] Also, in order to achieve operational reliability, the present embodiment may further be provided with a mounting portion 121 on the heat conductor 120, and the mounting portion 121 is used to fix the temperature control module. The temperature control module includes at least one of a thermostat, a fuse, a temperature sensing probe, etc. For example, a thermostat, a fuse, and a temperature sensing probe may be provided at the same time, so that real-time temperature detection during the heating process can be achieved, and when necessary, automatic power off is performed to improve safety. The mounting portion 121 may specifically be in the form of a threaded column, a mounting platform, etc., and the mounting portion 121 is formed on the heat conductor 120, and the mounting portion 121 may be integrally formed during the die-casting or casting process of the heat conductor 120, so that production efficiency can be improved.

[0081] See also Fig.12 , Fig.12 It is a schematic diagram of the cross-sectional structure of a fluid heating device 100 of another embodiment, wherein a spoiler structure 118 is further provided on the inner wall of the fluid channel 113, and the spoiler structure 118 disturbs the fluid flowing through the fluid channel 113. The function of the spoiler structure 118 of this embodiment is that when the fluid flows through the fluid channel 113, it is disturbed by the spoiler structure 118, and the fluid in the fluid channel 113 can be effectively disturbed to avoid stratification. It can be understood that when the stratification of the fluid in the fluid channel 113 is more obvious, for example, the fluid close to the inner wall of the fluid channel 113 is subject to friction resistance, and the flow rate will be lower than the flow rate of the fluid in the middle. In this way, the heat of the heating body 130 is difficult to transfer to the fluid in the middle position of the fluid channel 113, resulting in uneven heating. Then, by setting the spoiler structure 118, turbulence can be formed, thereby reducing the stratification as much as possible, so that the heating is more uniform.

[0082] In some feasible embodiments, the flow-disturbing structure 118 includes a flow-disturbing rib or a flow-disturbing groove disposed on the inner wall surface of the fluid channel 113 , and the flow-disturbing rib or the flow-disturbing groove extends spirally around the extension path of the fluid channel 113 . Fig.12 In the exemplary embodiment, the spoiler structure 118 is a spoiler rib protruding from the inner wall surface of the fluid channel 113. It can be understood that the spoiler rib can be an integrated structure with the main body 111. The provision of the spoiler rib, on the one hand, reduces the flow area of ​​the fluid channel 113 and increases the flow rate. Because the fluid in the fluid channel 113 is mostly turbulent, the heat exchange is faster when the flow rate increases, which can improve the heating efficiency.

[0083] Exemplarily, the spoiler ribs on the inner wall surface of the fluid channel 113 have a thickness dimension d1 along the radial direction of the fluid channel 113, and the radius of the fluid channel 113 is d2, satisfying the relationship: 0.4≤d1 / d2≤0.95. It can be understood that the inner side of the spoiler ribs in this embodiment actually defines a water flow channel. In this example, d1 / d2 reflects the size of the water flow channel. The larger the ratio of d1 / d2, the narrower the water flow channel. The smaller the ratio of d1 / d2, the wider the water flow channel. It can be understood that when the water flow channel is too wide, the water located in the center of the fluid channel 113 has a longer path for heat to be conducted by the heat conductor 120, the tube body 110 and the spoiler ribs, so the thermal conductivity effect may be reduced to a certain extent, and the ratio of d1 / d2 The smaller the ratio, the smaller the thickness of the spoiler rib, and the actual spoiler and water flow stratification breaking effect will also be reduced. When the ratio of d1 / d2 is too large and the water flow channel is too narrow, although the heat conduction path is short and the spoiler effect is more obvious, in such a setting, the water flow area is too small, which will affect the water output. Based on the above considerations, the present application can set d1 / d2 at 0.4 to 0.95, for example, the values ​​can be 0.4, 0.45, 0.5, 0.8, 0.9, 0.95, etc.

[0084] For further security, see Fig.13 In one embodiment, the fluid heating device 100 further includes a protective cover 140, which is sleeved on the outside of the tube body 110 and the heat conductor 120, and the protective cover 140 cooperates with the tube body 110 to form a protective cavity, and the heat conductor 120 is located in the protective cavity. The protective cover 140 can be made of fireproof material, and the setting of the protective cover 140 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.

[0085] In order to improve the convenience of assembly, the protective cover 140 of this embodiment includes a cover box 141 and a cover 142, and the cover box 141 and the cover 142 are detachably connected as a whole. The cover box 141 and the cover 142 may be provided with outlet holes corresponding to the above-mentioned temperature control module, and the cover box 141 and the cover 142 may be detachably connected by means of buckles, screws, etc.

[0086] In addition, the present application can further configure the protective cavity to be closed at one end and open at the other end in the extension direction of the fluid channel 113. Specifically, the above content mentioned that the main body 111 of the tube body 110 is provided with a pressure relief opening 116 connected to the fluid channel 113, and the pressure relief opening 116 is arranged at the end of the main body 111, and the above content also mentioned that under the above structural setting, we can more conveniently install and fix the entire fluid heating device 100 to the corner position of the internal space of the fuselage 250 of the hydraulic module. Specifically, the present application can be provided with a connecting portion 117 on the main body 111, and the connecting portion 117 is arranged at the end of the main body 111 and adjacent to the pressure relief opening 116. In this way, the connecting portion 117 can be used to form a hoisting installation method to fix the fluid heating device 100 to the upper corner position of the internal space of the fuselage 250. , and the pressure relief opening 116 faces the top wall of the fuselage 250, and the opening in the protective cover 140 is also set at the upper end of the protective cover 140, and corresponding to the pressure relief opening 116, the lower end of the protective cavity is closed. In this way, during operation, when the pressure in the fluid channel 113 is too high and pressure relief occurs, on the one hand, the liquid discharged from the pressure relief port will only directly impact the top wall of the fuselage 250, and will not directly impact other components in the hydraulic module. At the same time, after the discharged liquid falls, since the bottom of the protective cavity is closed, the protective cavity can well receive the liquid discharged during the pressure relief process, and will not endanger other electronic components located below the fluid heating device 100, so that the reliability during operation is further improved. On the other hand, under extreme working conditions, when the heat conductor 120 is hot-melted, the protective cavity formed by the protective cover 140 and the tube body 110 can also receive this part of the hot-melted heat conductor 120 due to the lower closure, thereby effectively protecting the components located below the fluid heating device 100.

[0087] Furthermore, the present application may also cover the outer wall surface and / or the inner wall surface of the protective cover 140 with a heat-insulating layer. That is, the present application may cover the outer wall surface of the protective cover 140 with a heat-insulating layer alone, or may set a heat-insulating layer on the inner wall surface of the protective cover 140 alone, or may cover both the inner wall surface and the outer wall surface of the protective cover 140 with a heat-insulating layer at the same time, wherein the material of the heat-insulating layer may be selected from, for example, sponge, foam, etc., and by such a setting, the protective cover 140 can achieve the function of protection, and can also reduce energy loss, and can also reduce the heat radiation outward during the operation of the fluid heating device 100, affecting other components. 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 tube body having a fluid channel and a liquid inlet and a liquid outlet communicated with the fluid channel; A heat conductor connected to the outer wall surface of the tube body; as well as A heating body is arranged on the heat conductor and is used for heating the fluid flowing through the fluid channel.

2. The fluid heating device according to claim 1, characterized in that: The heating body includes a plurality of sub-heating bodies, and the plurality of sub-heating bodies are arranged in sequence on the heat conductor along an extension path of the fluid channel.

3. The fluid heating device according to claim 2, characterized in that: The heat conductor is arranged around the tube body, the sub-heating body is a spiral structure and is arranged around the tube body, and a plurality of sub-heating bodies are arranged on the heat conductor in sequence along the extension path of the fluid channel.

4. The fluid heating device according to claim 2, characterized in that: The heat conductor is arranged around the tube body, the sub-heating body is a spiral structure and is arranged around the tube body, and a plurality of sub-heating bodies are arranged in sequence along the extension path of the fluid channel on the heat conductor and are spliced ​​end to end.

5. The fluid heating device according to claim 2, characterized in that: The heat conductor is arranged around the tube body, the sub-heating body is in a spiral structure and is arranged around the tube body, a plurality of sub-heating bodies are arranged in sequence on the heat conductor along the extension path of the fluid channel, and two adjacent sub-heating bodies are at least partially nested.

6. The fluid heating device according to any one of claims 2 to 5, characterized in that: The plurality of sub-heating bodies are located in the same straight line away from the outer edge of the tube body; And / or, the plurality of sub-heating bodies are located on the same straight line close to the inner edge of the tube body.

7. The fluid heating device according to any one of claims 2 to 5, characterized in that: The sub-heating body is embedded in the heat conductor and there is a gap between the outer wall of the tube body; Alternatively, the sub-heating body is embedded in the heat conductor and at least partially exposed on the inner surface of the heat conductor and in contact with the outer wall surface of the tube body.

8. The fluid heating device according to any one of claims 2 to 5, characterized in that: The sub-heating body is an electric heating tube or an electric heating film, and the sub-heating body includes two power terminals; The center lines of the power connection ends of all the sub-heating bodies are located on a plane.

9. The fluid heating device according to any one of claims 1 to 5, characterized in that: The tube body comprises a main body and two joint parts, the fluid channel is formed in the main body, the two joint parts are respectively connected to two ends of the main body along the extension direction of the fluid channel, and the liquid inlet and the liquid outlet are respectively formed in the two joint parts; The joint part protrudes outward from the outer side wall of the main body, and the heating body is connected between the two joint parts.

10. The fluid heating device according to claim 9, characterized in that: The main body is also provided with a pressure relief opening which is in communication with the fluid channel.

11. The fluid heating device according to any one of claims 1 to 5, characterized in that: The heat conductor is made of aluminum alloy; And / or, a mounting portion is further provided on the heat conductor, and the mounting portion is used to fix the temperature control module.

12. The fluid heating device according to any one of claims 1 to 5, characterized in that: It also includes a protective cover, which is sleeved on the outside of the tube body and the heat conductor, and the protective cover and the tube body cooperate to form a protective cavity, and the heat conductor is located in the protective cavity.

13. The fluid heating device according to claim 12, characterized in that: The protective cover comprises a cover box and a cover cover, and the cover box and the cover cover are detachably connected as a whole.

14. The fluid heating device according to claim 12, characterized in that: The protection cavity is closed at one end and open at the other end in the extending direction of the fluid channel.

15. The fluid heating device according to claim 12, characterized in that: The outer wall surface and / or the inner wall surface of the protective cover are also covered with a heat-insulating layer.

16. The fluid heating device according to any one of claims 1 to 5, characterized in that: A flow-disturbing structure is also provided on the inner wall of the fluid channel, and the flow-disturbing structure disturbs the fluid flowing through the fluid channel.

17. The fluid heating device according to claim 16, characterized in that The flow-disturbing structure includes flow-disturbing ribs or flow-disturbing grooves arranged on the inner wall surface of the fluid channel.

18. The fluid heating device according to claim 17, characterized in that The spoiler rib or the spoiler groove extends spirally around the extension path of the fluid channel; And / or, the thickness of the spoiler rib in the radial direction of the fluid channel is d1, and the radius of the fluid channel is d2, satisfying the relationship 0.4≤d1 / d2≤0.

95.

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

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

Images