Combined heat exchange device, heat pump unit and hot water equipment
By setting a second heat exchanger inside the shell-and-tube heat exchanger and performing countercurrent heat exchange, the problems of wasted space and limited performance of the shell-and-tube heat exchanger are solved, thereby improving heat exchange performance and overall competitiveness.
Patent Information
- Application Number
- CN202423053611.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-10
AI Technical Summary
Existing shell-and-tube heat exchangers waste internal space within a limited area and cannot be effectively matched with other heat exchangers such as finned heat exchangers, resulting in limited overall heat exchange performance.
A combination of a shell-and-tube heat exchanger and a second heat exchanger is adopted. The second heat exchanger is set in the internal space of the shell-and-tube heat exchanger. The fluid flows in series through connecting pipes to achieve counter-current heat exchange, thereby improving the heat exchange area and performance.
By improving the overall heat exchange capacity within the same space, avoiding space waste, achieving performance matching with other heat exchangers, and enhancing the competitiveness of heat exchange products.
Smart Images
Figure CN223550935U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of energy conversion technology, and in particular to a combined heat exchange device, a heat pump unit, and a hot water equipment. Background Technology
[0002] Because shell-and-tube heat exchangers are suitable for a variety of fluids and operating conditions, including high-temperature, high-pressure, and corrosive fluids, they have broad application prospects in various heat exchange equipment.
[0003] In order to increase the tube length and heat exchange area of shell-and-tube heat exchangers within a limited installation space, the shell of the shell-and-tube heat exchanger is often wound into a spiral tube. However, this will result in a hollow internal space in the middle of the shell-and-tube heat exchanger. If this internal space cannot be utilized, it will result in a waste of space in the central area of the shell-and-tube heat exchanger.
[0004] In addition, when other heat exchangers with better heat exchange performance (such as finned heat exchangers) are used in conjunction with shell-and-tube heat exchangers to achieve refrigerant circulation in refrigerant circulation systems (such as heat pump units, air conditioning units, etc.), the heat exchange performance of the shell-and-tube heat exchanger is relatively low and cannot be matched with that of other heat exchangers (such as finned heat exchangers), which will cause the whole unit to fail to perform effectively. Utility Model Content
[0005] This application provides a combined heat exchange device, a heat pump unit, and a hot water equipment to solve the technical problems of space waste and limited heat exchange performance when using shell-and-tube heat exchangers for heat exchange in the prior art.
[0006] In a first aspect, this application provides a combined heat exchange device, comprising:
[0007] The first heat exchanger is made of a spiral wound sleeve.
[0008] The second heat exchanger is located in the internal space surrounding the first heat exchanger.
[0009] Optionally, the first heat exchanger and the second heat exchanger are connected in series via a first connecting pipe to allow the first fluid to flow from the first heat exchanger to the second heat exchanger.
[0010] The first heat exchanger and the second heat exchanger are connected in series via a second connecting pipe, which is used to allow the second fluid to flow from the second heat exchanger to the first heat exchanger.
[0011] The first fluid and the second fluid exchange heat in the first heat exchanger and the second heat exchanger.
[0012] Optionally, the two ends of the first connecting pipe are detachably connected to the first heat exchanger and the second heat exchanger, respectively.
[0013] The two ends of the second connecting pipe are detachably connected to the first heat exchanger and the second heat exchanger, respectively.
[0014] Optionally, the first end of the sleeve is provided with a first inlet and a second outlet, and the second end of the sleeve is provided with a second inlet and a first outlet. The first inlet and the first outlet are connected through a first channel inside the sleeve, and the second inlet and the second outlet are connected through a second channel inside the sleeve. The fluid flow direction in the first channel is opposite to the fluid flow direction in the second channel.
[0015] Optionally, the sleeve includes an inner tube and an outer tube arranged coaxially, with one of the first channel and the second channel formed inside the inner tube and the other formed between the outer wall of the inner tube and the inner wall of the outer tube.
[0016] Optionally, the second heat exchanger includes a shell and heat exchange tubes, the shell having a cavity for containing fluid, and the heat exchange tubes being disposed in contact with the wall of the shell.
[0017] Optionally, the cylinder is provided with a third inlet and a third outlet, and the heat exchange tube is disposed inside the cylinder, with the heat exchange tube having a fourth inlet and a fourth outlet extending out of the cylinder.
[0018] Optionally, the outer surface of the cylinder is in contact with the sleeve, and the cylinder is made of a thermally conductive material.
[0019] Optionally, there is a preset distance between the outer surface of the cylinder and the sleeve, and the cylinder is made of thermal insulation material.
[0020] Optionally, both the first and second heat exchangers are equipped with exhaust valves at their tops.
[0021] Optionally, both the first and second heat exchangers are equipped with drain valves at their bottoms.
[0022] Secondly, this application provides a heat pump unit, including the combined heat exchange device provided in the first aspect of this application, and also includes a fixed component, which is connected to the first heat exchanger and the second heat exchanger respectively.
[0023] Thirdly, this application provides a hot water device, including the combined heat exchange device provided in the first aspect of this application;
[0024] Alternatively, it may include the heat pump unit provided in the second aspect of the embodiments of this application.
[0025] The technical solutions provided in this application have the following advantages compared with the prior art:
[0026] The combined heat exchange device provided in this application includes a first heat exchanger and a second heat exchanger. The first heat exchanger is formed by spirally winding a sleeve, which can increase the heat exchange tube length and heat exchange area of the first heat exchanger within a limited installation space. The second heat exchanger is disposed in the internal space surrounding the first heat exchanger, which can make full use of the internal space of the central area of the first heat exchanger and avoid the waste of the hollow internal space formed by the spiral winding of the first heat exchanger. When the second heat exchanger has the same function as the first heat exchanger, the heat exchange capacity of the whole unit can be improved by combining the first and second heat exchangers in the same volume space. It can achieve heat exchange performance matching with other heat exchangers with good heat exchange performance (such as finned heat exchangers), so that the overall performance of the unit can be effectively utilized, thereby improving the competitiveness of heat exchange products (such as heat pump units, air conditioning units, or hot water equipment).
[0027] The heat pump unit and hot water equipment provided in this application include the above-mentioned combined heat exchange device, which can set the second heat exchanger in the internal space of the first heat exchanger. While improving the heat exchange performance, it is also conducive to achieving a compact setting of the heat exchange device. Therefore, it naturally has the technical effects of the above-mentioned combined heat exchange device. Attached Figure Description
[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0030] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.
[0031] Figure 1 A schematic diagram of the structure of the combined heat exchanger provided in the embodiments of this application. Figure 1 ;
[0032] Figure 2 A schematic diagram of the structure of the combined heat exchanger provided in the embodiments of this application. Figure 2 ;
[0033] Figure 3 This is a schematic diagram of the structure of the first heat exchanger and the first support provided in an embodiment of this application;
[0034] Figure 4 Provided for the embodiments of this application Figure 3 Top view;
[0035] Figure 5 The following are provided for the embodiments of this application: Figure 4 A partial cross-sectional view of AA in the middle;
[0036] Figure 6 This is a schematic diagram of the structure of the second heat exchanger and the second support provided in the embodiments of this application;
[0037] Figure 7 This is a schematic diagram of the structure of the second heat exchanger and the second support after the shell has been removed, as provided in an embodiment of this application.
[0038] Figure 8 A partial cross-sectional view of the second heat exchanger provided in an embodiment of this application;
[0039] Figure 9 This is a connection diagram of a heat pump unit provided in an embodiment of this application;
[0040] Figure 10 This is a partial structural diagram of a hot water device provided in an embodiment of this application.
[0041] Explanation of reference numerals in the attached figures:
[0042] 1. First heat exchanger; 11. Shell; 111. Inner tube; 112. Outer tube; 12. First inlet; 13. Second outlet; 14. Second inlet; 15. First outlet; 16. First vent valve; 17. First drain valve; 18. First temperature sensing element;
[0043] 2. Second heat exchanger; 21. Shell; 211. Third inlet; 212. Third outlet; 213. Shell body; 22. Heat exchange tube; 221. Fourth inlet; 222. Fourth outlet; 223. Spiral tube section; 23. Second exhaust valve; 24. Second drain valve; 25. Second temperature sensing element;
[0044] 3. First connecting pipe;
[0045] 4. Second connecting pipe;
[0046] 5. Fixing components; 51. First bracket; 511. Bracket body one; 512. First fixing hole; 513. Connector; 52. Second bracket; 521. Bracket body two; 522. Second fixing hole;
[0047] 6. Compressor;
[0048] 7. Third heat exchanger;
[0049] 8. Chassis components;
[0050] 9. Partition assembly. Detailed Implementation
[0051] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0052] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.
[0053] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.
[0054] To address the technical problems of wasted space and limited heat exchange performance when using shell-and-tube heat exchangers in existing technologies, this application provides a combined heat exchange device, a heat pump unit, and a hot water equipment. This combined heat exchange device places the second heat exchanger 2 within the internal space of the first heat exchanger 1 (i.e., the shell-and-tube heat exchanger), enabling full utilization of the internal space in the central area of the first heat exchanger 1 and avoiding wasted installation space. Simultaneously, when the first heat exchanger 1 and the second heat exchanger 2 have the same function, their combined use can be used to match the heat exchange performance of other heat exchangers with better heat exchange capabilities (such as finned heat exchangers), facilitating the full and effective utilization of the overall heat exchange performance.
[0055] Please see Figures 1 to 10 The first aspect of this application provides a combined heat exchange device, including a first heat exchanger 1 and a second heat exchanger 2. The first heat exchanger 1 is formed by spirally winding a sleeve 11, which can increase the heat exchange tube length and heat exchange area of the first heat exchanger 1 within a limited installation space. The second heat exchanger 2 is disposed in the internal space surrounding the first heat exchanger 1, which can make full use of the internal space of the central area of the first heat exchanger 1 and avoid the waste of the hollow internal space formed by the spiral winding of the sleeve 11. When the second heat exchanger 2 has the same function as the first heat exchanger 1, the heat exchange capacity of the whole machine can be improved by combining the first heat exchanger 1 and the second heat exchanger 2 in the same volume space. It can achieve heat exchange performance matching with other heat exchangers with good heat exchange performance (such as finned heat exchangers), so that the overall performance can be effectively utilized, thereby improving the competitiveness of heat exchange products (such as heat pump units, air conditioning units, or hot water equipment).
[0056] It should be noted that the size and shape of the second heat exchanger 2 match the internal space of the central area of the first heat exchanger 1, giving the combined heat exchange device a compact product structure. The heat exchange capabilities (condensation heat release capacity or evaporation heat absorption capacity) of the first heat exchanger 1 and the second heat exchanger 2 can be superimposed, thereby improving the overall heat exchange capacity of the combined heat exchange device. Alternatively, under the same heating capacity conditions, this combined heat exchange device can achieve a smaller size for the shell-and-tube heat exchanger (i.e., the first heat exchanger 1), reducing the overall space occupied by the combined heat exchange device within the unit and facilitating the miniaturization of the unit's structural design.
[0057] In the above embodiments, the first heat exchanger 1 and the second heat exchanger 2 have the same function. The refrigerant can be evaporated in both the first heat exchanger 1 and the second heat exchanger 2, or the refrigerant can be condensed in both the first heat exchanger 1 and the second heat exchanger 2, which is beneficial to achieve sufficient evaporation or full condensation of the refrigerant. The specific functions of the combined heat exchange device can be set as needed, and are not limited here.
[0058] In some embodiments of this application, please refer to Figure 1 , Figure 2 and Figure 9 The first heat exchanger 1 and the second heat exchanger 2 are connected in series via a first connecting pipe 3, which allows the first fluid to flow from the first heat exchanger 1 to the second heat exchanger 2; the first heat exchanger 1 and the second heat exchanger 2 are connected in series via a second connecting pipe 4, which allows the second fluid to flow from the second heat exchanger 2 to the first heat exchanger 1; the first fluid and the second fluid exchange heat in the first heat exchanger 1 and the second heat exchanger 2, which can realize countercurrent heat exchange between the first fluid and the second fluid in the first heat exchanger 1 and the second heat exchanger 2, thereby achieving optimal heat exchange in the combined heat exchange device.
[0059] In the above embodiments, the first fluid and the second fluid can be substances that can exchange heat, such as refrigerant, water, or oil (i.e., refrigerant). The first fluid and the second fluid can be the same or different. Both can achieve countercurrent heat exchange in the two heat exchangers through the combined heat exchange device. This heat exchange method allows the cold fluid and the hot fluid to flow in opposite directions, so that the cold fluid can absorb more heat when it flows out of the combined heat exchange device, while the hot fluid can release more heat when it flows out of the combined heat exchange device. This keeps the temperature difference between the cold and hot fluids relatively large, thereby improving the heat exchange efficiency of the combined heat exchange device.
[0060] In some embodiments of this application, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 6 The two ends of the first connecting pipe 3 are detachably connected to the first heat exchanger 1 and the second heat exchanger 2, respectively; the two ends of the second connecting pipe 4 are detachably connected to the first heat exchanger 1 and the second heat exchanger 2, respectively. Since the second heat exchanger 2 is embedded in the internal space of the center of the first heat exchanger 1, the pipes are prone to intersecting. The first connecting pipe 3 and the second connecting pipe 4 are both detachably connected to the first heat exchanger 1 and the second heat exchanger 2. The second heat exchanger 2 can be embedded in the middle of the first heat exchanger 1 before the first connecting pipe 3 and the second connecting pipe 4 are assembled. This can avoid interference between the heat exchangers (i.e., the first heat exchanger 1 and the second heat exchanger 2) and the connecting pipes (i.e., the first connecting pipe 3 and the second connecting pipe 4), reduce the difficulty of connecting the pipes between the first heat exchanger 1 and the second heat exchanger 2, and improve the assembly efficiency of the combined heat exchange device.
[0061] In the above embodiments, the shape and length of the first connecting pipe 3 and the second connecting pipe 4 are determined according to the layout requirements of the first heat exchanger 1 and the second heat exchanger 2, and are not limited here.
[0062] In some embodiments of this application, please refer to Figure 1 , Figure 2, Figure 3 , Figure 4 and Figure 5 The first end of the sleeve 11 is provided with a first inlet 12 and a second outlet 13, and the second end of the sleeve 11 is provided with a second inlet 14 and a first outlet 15. The first inlet 12 and the first outlet 15 are connected through a first channel inside the sleeve 11, which can be used to realize the flow of the first fluid inside the sleeve 11, so that the first fluid flows from the first end of the sleeve 11 to the second end. The second inlet 14 and the second outlet 13 are connected through a second channel inside the sleeve 11, which can be used to realize the flow of the second fluid inside the sleeve 11, so that the second fluid flows from the second end of the sleeve 11 to the first end. The flow direction of the fluid in the first channel is opposite to that of the fluid in the second channel, so that the first fluid and the second fluid can achieve counter-current heat exchange along the length of the sleeve 11, which is beneficial to achieving efficient heat exchange between the first fluid and the second fluid in the first heat exchanger 1.
[0063] In some embodiments of this application, please refer to Figure 4 and Figure 5 The sleeve 11 includes an inner tube 111 and an outer tube 112 arranged coaxially. One of the first channel and the second channel is formed inside the inner tube 111, and the other is formed between the outer wall of the inner tube 111 and the inner wall of the outer tube 112, so that the fluid in the first channel and the fluid in the second channel can exchange heat through the tube wall of the inner tube 111.
[0064] In some embodiments of this application, please refer to Figures 1 to 5 The first inlet 12 and the first outlet 15 are both connected to the wall of the outer tube 112 in the sleeve 11, so that the first channel is formed between the outer wall of the inner tube 111 and the inner wall of the outer tube 112. The second inlet 14 and the second outlet 13 are both connected to the inner tube 111 in the sleeve 11, so that the second channel is formed inside the inner tube 111.
[0065] In some embodiments of this application, please refer to Figure 1 , Figure 2 , Figure 6 and Figure 7 The second heat exchanger 2 includes a cylinder 21 and a heat exchange tube 22. The cylinder 21 has a cavity for containing fluid. The heat exchange tube 22 is arranged in contact with the wall of the cylinder 21, which can realize heat transfer between the cylinder 21 and the heat exchange tube 22, thereby realizing heat exchange between the fluid inside the cylinder 21 and the fluid inside the heat exchange tube 22.
[0066] It should be noted that the shell 21 and the heat exchange tube 22 are arranged in contact, which makes the structure of the second heat exchanger 2 compact and avoids wasted space in the second heat exchanger 2. The heat exchange tube 22 can be arranged outside the shell 21 or inside the shell 21, both of which can achieve the purpose of this application.
[0067] In some embodiments of this application, please refer to Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 8 The cylinder 21 is provided with a third inlet 211 and a third outlet 212, which can be used to realize the input and output of fluid inside the cylinder 21. The heat exchange tube 22 is arranged inside the cylinder 21, so that the tube wall of the heat exchange tube 22 can fully contact the fluid inside the cylinder 21, thereby realizing efficient heat exchange between the fluid inside the heat exchange tube 22 and the fluid inside the cylinder 21. The heat exchange tube 22 has a fourth inlet 221 and a fourth outlet 222 extending out of the cylinder 21, which can realize the input and output of fluid inside the heat exchange tube 22. One of the first fluid and the second fluid flows inside the cylinder 21, and the other flows inside the heat exchange tube 22. Heat exchange between the first fluid and the second fluid can be realized inside the cylinder 21 through the tube wall of the heat exchange tube 22.
[0068] It should be noted that when the heat exchange tube 22 is placed inside the cylinder 21, heat loss can be avoided by the heat exchange tube 22 coming into contact with the air outside the cylinder 21, thus ensuring the heat exchange efficiency of the second heat exchanger 2.
[0069] In the above embodiments, the number of heat exchange tubes 22 can be one or more, all of which can achieve the function of heat exchange with the fluid inside the cylinder 21. However, when the number of heat exchange tubes 22 is multiple, the connection process between the heat exchange tubes 22 and the cylinder 21 becomes complicated. In order to ensure the heat exchange tube length and heat exchange area of the heat exchange tubes 22, it is preferable to wind each heat exchange tube 22 in a spiral shape, so that the heat exchange tube 22 has a spiral tube section 223, which realizes a dense heat exchange area on the inner wall of the cylinder 21, and at the same time reduces the number of heat exchange tubes 22 assembled inside the cylinder 21.
[0070] In some embodiments of this application, please refer to Figure 6 , Figure 7 and Figure 8 Both the third inlet 211 and the third outlet 212 are connected to the cylinder wall of the cylinder body 213. Fluid can be input into the cylinder body 21 through the third inlet 211. After passing through the gap in the pipe wall of the spiral tube section 223, the fluid inside the cylinder body 21 can be output through the third outlet 212, thereby realizing the input and output of fluid inside the cylinder body 21.
[0071] In some embodiments of this application, please refer to Figures 1 to 8The first outlet 15 of the first heat exchanger 1 is connected to the fourth inlet 221 of the second heat exchanger 2 through the first connecting pipe 3, so that the first fluid enters from the first inlet 12 of the first heat exchanger 1, flows along the first channel formed between the outer wall of the inner tube 111 and the inner wall of the outer tube 112 to the first outlet 15, then flows into the fourth inlet 221 of the heat exchange tube 22 through the first connecting pipe 3, flows along the spiral tube section 223 of the heat exchange tube 22, and finally exits from the fourth outlet 222 of the heat exchange tube 22.
[0072] In some embodiments of this application, please refer to Figures 1 to 8 The third outlet 212 on the second heat exchanger 2 is connected to the second inlet 14 of the first heat exchanger 1 through the second connecting pipe 4, so that the second fluid enters the interior of the cylinder 21 from the third inlet 211 of the second heat exchanger 2, then enters the second connecting pipe 4 through the third outlet 212 on the cylinder 21, then enters the inner tube 111 of the sleeve 11 from the second inlet 14, and finally flows out from the second outlet 13 connected to the inner tube 111.
[0073] In some embodiments of this application, please refer to Figure 1 and Figure 2 The first outlet 15 is located at the bottom of the sleeve 11, and the fourth inlet 221 is located at the top of the cylinder 21. In order to connect the two, the first outlet 15 extends upward into the internal space of the sleeve 11. The first connecting pipe 3 is an inverted U-shaped pipe, which can realize the connection between the first outlet 15 and the fourth inlet 221.
[0074] In some embodiments of this application, please refer to Figure 1 and Figure 2 The second inlet 14 is located at the bottom of the sleeve 11, and the third outlet 212 is located on one side of the cylinder 21. In order to achieve the connection between them, the second inlet 14 extends upward to the outside of the sleeve 11. The second connecting pipe 4 is a 7-shaped pipe, which can realize the connection between the third outlet 212 and the second inlet 14.
[0075] In some embodiments of this application, the outer surface of the cylinder 21 is in contact with the sleeve 11. The cylinder 21 is made of a thermally conductive material, which enables heat conduction between the first heat exchanger 1 and the second heat exchanger 2, thereby reducing heat loss between the first heat exchanger 1 and the second heat exchanger 2. Since the first heat exchanger 1 and the second heat exchanger 2 have the same function, their contact arrangement will not adversely affect their respective heat exchange efficiency.
[0076] In some other embodiments of this application, there is a preset distance between the outer surface of the cylinder 21 and the sleeve 11, so that there is a small assembly gap (1-10mm) between the two, which can reduce the assembly difficulty of the second heat exchanger 2 being embedded in the first heat exchanger 1. The material of the cylinder 21 is a heat insulation material, which can prevent the heat in the second heat exchanger 2 from being lost to the internal space in the center of the first heat exchanger 1, and can reduce the energy loss of the second heat exchanger 2.
[0077] In some embodiments of this application, please refer to Figure 1 , Figure 2 and Figure 3 Both the first heat exchanger 1 and the second heat exchanger 2 are equipped with exhaust valves at their tops, which can discharge the air inside the first heat exchanger 1 and the second heat exchanger 2 to prevent air blockage and thus ensure the normal operation of the first heat exchanger 1 and the second heat exchanger 2.
[0078] In some embodiments of this application, please refer to Figure 1 , Figure 2 and Figure 3 The first heat exchanger 1 is provided with a first exhaust valve 16, which is connected to the second outlet 13 at the top of the sleeve 11. It can be used to exhaust the air accumulated at the top of the inner tube 111, which can ensure that the second fluid can flow smoothly in the inner tube 111, thereby improving the heat exchange efficiency of the first fluid and the second fluid inside the sleeve 11.
[0079] In some embodiments of this application, please refer to Figure 1 and Figure 2 In order to expel the air accumulated inside the shell 21 of the second heat exchanger 2, the second exhaust valve 23 of the second heat exchanger 2 can be set on the third outlet 212 located at the upper part of the second heat exchanger 2 or on the second connecting pipe 4 connected to the third outlet 212. Both can achieve the purpose of this application, so that the second fluid can flow out smoothly from the inside of the shell 21, improve the flow smoothness of the second fluid inside the shell 21, and thus improve the heat exchange efficiency of the first fluid and the second fluid inside the shell 21.
[0080] In some embodiments of this application, please refer to Figure 1 and Figure 3 Both the first heat exchanger 1 and the second heat exchanger 2 are equipped with drain valves at the bottom, which can discharge the accumulated liquid and impurities at the bottom of the first heat exchanger 1 and the second heat exchanger 2. This facilitates the drainage of the first heat exchanger 1 and the second heat exchanger 2 and avoids the presence of accumulated liquid and impurities affecting the heat transfer efficiency and service life of the first heat exchanger 1 and the second heat exchanger 2.
[0081] In some embodiments of this application, please refer to Figure 1 and Figure 3The first drain valve 17 at the bottom of the first heat exchanger 1 is connected to the second inlet 14 at the bottom of the sleeve 11, which can discharge the accumulated liquid and impurities at the bottom of the sleeve 11.
[0082] In some embodiments of this application, please refer to Figure 1 and Figure 2 The second drain valve 24 at the bottom of the second heat exchanger 2 is connected to the third inlet 211 at the bottom of the cylinder 21, which can discharge the accumulated liquid and impurities at the bottom of the cylinder 21.
[0083] When the combined heat exchanger is installed in a low-temperature environment, if the combined heat exchanger loses power or stops operating, the internal temperature of the first heat exchanger 1 and the second heat exchanger 2 will drop, which may cause the water in the pipes to freeze, posing a risk of freezing inside both the first heat exchanger 1 and the second heat exchanger 2. The first vent valve 16 and the second vent valve 23 can release air from the first heat exchanger 1 and the second heat exchanger 2, which helps reduce the pressure in the casing 11 and the cylinder 21, thereby reducing the possibility of water freezing and preventing, to some extent, the pipes and cylinder 21 from freezing and cracking due to internal water freezing. The first drain valve 17 and the second drain valve 24 can drain the accumulated liquid from the pipes or cylinder 21. After draining the accumulated liquid, the possibility of water freezing inside the pipes and cylinder 21 is greatly reduced, thus preventing freezing damage to the pipes and cylinder 21 and damage to the device caused by freezing.
[0084] It should be noted that the combined heat exchange device in this application can be applied to any equipment that needs to achieve heat exchange, such as heat pump units, air conditioning units, etc., and can achieve reasonable utilization of installation space and a significant improvement in heat exchange capacity.
[0085] Please see Figures 1 to 10 The second aspect of this application provides a heat pump unit, including the combined heat exchange device described in the above embodiments, and further including a fixing component 5. The fixing component 5 is connected to the first heat exchanger 1 and the second heat exchanger 2 respectively, and can be used to realize the fixed setting of the first heat exchanger 1 and the second heat exchanger 2 in the heat pump unit.
[0086] In some embodiments of this application, please refer to Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 9 and Figure 10The fixing component 5 includes a first bracket 51 and a second bracket 52. The first bracket 51 is used to connect with the first heat exchanger 1, and the second bracket 52 is used to connect with the second heat exchanger 2. The second bracket 52 can be set on the first bracket 51 first, and the first heat exchanger 1 and the second heat exchanger 2 can be connected into a whole. Then, the first bracket 51 or the second bracket 52 can be connected to other components in the heat pump unit (such as the chassis assembly 8), thereby realizing the fixed installation of the combined heat exchange device in the heat pump unit.
[0087] In some embodiments of this application, please refer to Figure 3 and Figure 4 The first bracket 51 includes a bracket body 511, a first fixing hole 512, and a connector 513. The connector 513 is used to realize the detachable connection between the bracket body 511 and the second bracket 52. The first fixing hole 512 is used to realize the connection between the bracket body 511 and the chassis assembly 8. Thus, the connection between the combined heat exchange device and the chassis assembly 8 can be realized through the first bracket 51.
[0088] In some embodiments of this application, please refer to Figure 4 The first fixing hole 512 is a strip hole, which can realize the installation position adjustment of the bracket body 511 on the chassis assembly 8, so that the combined heat exchange device is located in a suitable position in the heat pump unit.
[0089] In some embodiments of this application, please refer to Figure 6 and Figure 7 The second support 52 includes two symmetrically arranged support bodies 521. The two support bodies 521 are connected to both sides of the cylinder 21 and can provide vertical support for the cylinder 21. The support bodies 521 are provided with second fixing holes 522, which can be used to connect with the connectors 513 on the first support 51.
[0090] In some embodiments of this application, please refer to Figure 7 and Figure 10 The heat pump unit also includes a compressor 6 and a third heat exchanger 7. The function of the third heat exchanger 7 differs from that of the first heat exchanger 1 and the second heat exchanger 2, allowing the refrigerant to undergo physical changes of evaporation and heat absorption, and condensation and heat release within the heat pump unit. Specifically, when the refrigerant evaporates and absorbs heat in the third heat exchanger 7, it condenses and releases heat in the first heat exchanger 1 and the second heat exchanger 2; conversely, when the refrigerant condenses and releases heat in the third heat exchanger 7, it evaporates and absorbs heat in the first heat exchanger 1 and the second heat exchanger 2.
[0091] It should be noted that the third heat exchanger 7 can be a finned heat exchanger or other heat exchanger with good heat exchange performance. By connecting the first heat exchanger 1 and the second heat exchanger 2 in series, the heat exchange performance of the third heat exchanger 7 can be matched. By placing a second heat exchanger 2 inside the cavity of the shell-and-tube heat exchanger (i.e., the first heat exchanger 1) for combination, the heat exchange capacity of the heat pump unit is improved. This makes the combined heat exchange device installed in the limited structural space comparable to the heat exchange performance of the finned heat exchanger, which can better utilize the performance of the heat exchanger, help to fully realize the energy efficiency of the heat pump unit, and enhance the product competitiveness.
[0092] In some embodiments of this application, the first fluid is a hot fluid and the second fluid is a cold fluid. The first heat exchanger 1 and the second heat exchanger 2 have the same function, both used to raise the temperature of the second fluid. At this time, the first fluid condenses and releases heat in the first heat exchanger 1 and the second heat exchanger 2, which can transfer heat to the second fluid to heat the second fluid.
[0093] In some embodiments of this application, please refer to Figure 9 When the first fluid is the refrigerant circulating in the heat pump unit, the third heat exchanger 7 is the evaporator of the heat pump unit, which can realize the evaporation and heat absorption of the first fluid, so as to continuously input the high-temperature first fluid into the combined heat exchange device.
[0094] Specifically, after being discharged from compressor 6, the first fluid sequentially enters the first heat exchanger 1 and the second heat exchanger 2 for condensation and heat release. The second fluid sequentially flows into the second heat exchanger 2 and the first heat exchanger 1, engaging in counter-current heat exchange with the first fluid and absorbing the heat transferred by the first fluid, thereby raising the temperature of the second fluid. The first fluid flows from the high-temperature side to the low-temperature side of the combined heat exchange device, while the second fluid flows from the low-temperature side to the high-temperature side, which facilitates efficient heat exchange between the first and second fluids in the combined heat exchange device.
[0095] In some embodiments of this application, please refer to Figure 10 The heat pump unit also includes a partition assembly 9 installed on the chassis assembly 8, which can be used to separate the installation space of the combined heat exchange device in the heat pump unit. This facilitates the partitioning of each component in the heat pump unit and avoids mutual interference or influence between the combined heat exchange device and other components in the heat pump unit. It is suitable for side-discharge heat pump units and can separate the installation space that matches the combined heat exchange device through the partition assembly 9.
[0096] Please see Figures 1 to 10A third aspect of this application provides a hot water device, including the combined heat exchanger described in the above embodiments. In this case, the first fluid is a refrigerant, and the second fluid is water. Heating of the water can be achieved through a first heat exchanger 1 and a second heat exchanger 2. By combining the two heat exchangers, the heat exchange performance of the entire unit can be further improved within the same volume space, thereby increasing the heating efficiency of the hot water device. Alternatively, the compactly arranged combined heat exchanger facilitates the miniaturization of the hot water device design.
[0097] In some embodiments of this application, the hot water equipment includes the heat pump unit described in the above embodiments. The heat pump unit uses the thermal energy of the refrigerant (i.e., the first fluid) to heat water (i.e., the second fluid), without consuming large amounts of electricity or gas. Using a heat pump unit can replace traditional coal, oil, boilers, and other equipment, improving heating efficiency and reducing operating costs. This makes the hot water equipment of this application suitable not only for domestic hot water supply but also for commercial locations such as factories, schools, and hospitals.
[0098] In some embodiments of this application, please refer to Figure 1 and Figure 2 The first exhaust valve 16 and the second exhaust valve 23 are located at the high point of the outlet pipe of the first heat exchanger 1 and the second heat exchanger 2, which can be used to discharge the gas accumulated at the top of the outlet pipe. The first drain valve 17 and the second drain valve 24 are located at the low point of the inlet pipe of the first heat exchanger 1 and the second heat exchanger 2, which can facilitate the drainage of accumulated liquid and impurities, and help realize the sewage discharge and power failure antifreeze function of the hot water equipment.
[0099] In some embodiments of this application, in order to detect the water temperature, a second temperature detection element 25 is provided at the third inlet 211 of the second heat exchanger 2 to measure the initial temperature of the second fluid (i.e., water), and a first temperature detection element 18 is provided at the second outlet 13 of the first heat exchanger 1 to measure the output temperature of the second fluid. Based on the detection information of the first temperature detection element 18 and the second temperature detection element 25, the heating parameters can be adjusted, which is beneficial to realize the intelligent temperature control adjustment of the hot water equipment.
[0100] Please see Figures 1 to 10 In some embodiments of this application, the operation process of the above-mentioned hot water equipment is as follows:
[0101] Step 1: The first fluid (i.e., refrigerant) is compressed by compressor 6, turning the first fluid into a high-temperature, high-pressure gas;
[0102] Step 2: The high-temperature and high-pressure first fluid enters the first channel of the sleeve 11 through the first inlet 12, and then flows through the first channel to the first outlet 15 of the sleeve 11; then it enters the heat exchange tube 22 of the second heat exchanger 2 through the first connecting pipe 3, and flows through the fourth inlet 221, the spiral tube section 223 and the fourth outlet 222 in sequence, and achieves secondary condensation in the first heat exchanger 1 and the second heat exchanger 2, so that the first fluid becomes a high-pressure and low-temperature liquid;
[0103] Meanwhile, the low-temperature second fluid (i.e., water) enters the interior of the cylinder 21 through the third inlet 211 at the bottom of the cylinder 21, exchanges heat with the first fluid inside the heat exchange tube 22, then enters the second connecting pipe 4 through the third outlet 212 at the top of the cylinder 21, enters the second inlet 14 at the bottom of the sleeve 11 through the second connecting pipe 4, flows in the inner tube 111 of the sleeve 11, and exchanges heat with the first fluid outside the inner tube 111, and finally outputs high-temperature hot water through the second outlet 13 at the top of the sleeve 11.
[0104] Step 3: The first fluid flowing out from the fourth outlet 222 of the heat exchange tube 22 flows through the refrigerant circulation pipeline to the third heat exchanger 7, where it evaporates and absorbs heat, becoming a low-temperature, low-pressure saturated gaseous state, and then returns to the compressor 6 to facilitate the next refrigerant cycle.
[0105] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.
[0106] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.
[0107] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.
Claims
1. A combined heat exchange device, characterized in that, include: The first heat exchanger (1) is made by spirally winding a sleeve (11); The second heat exchanger (2) is disposed in the internal space surrounding the first heat exchanger (1).
2. The combined heat exchanger according to claim 1, characterized in that, The first heat exchanger (1) and the second heat exchanger (2) are connected in series by a first connecting pipe (3) to allow the first fluid to flow from the first heat exchanger (1) to the second heat exchanger (2); The first heat exchanger (1) and the second heat exchanger (2) are connected in series by a second connecting pipe (4) to allow the second fluid to flow from the second heat exchanger (2) to the first heat exchanger (1); The first fluid and the second fluid exchange heat in the first heat exchanger (1) and the second heat exchanger (2).
3. The combined heat exchanger according to claim 2, characterized in that, The two ends of the first connecting pipe (3) are detachably connected to the first heat exchanger (1) and the second heat exchanger (2), respectively. The two ends of the second connecting pipe (4) are detachably connected to the first heat exchanger (1) and the second heat exchanger (2), respectively.
4. The combined heat exchanger according to any one of claims 1 to 3, characterized in that, The first end of the sleeve (11) is provided with a first inlet (12) and a second outlet (13), and the second end of the sleeve (11) is provided with a second inlet (14) and a first outlet (15). The first inlet (12) and the first outlet (15) are connected through a first channel inside the sleeve (11), and the second inlet (14) and the second outlet (13) are connected through a second channel inside the sleeve (11). The fluid flow direction in the first channel is opposite to the fluid flow direction in the second channel.
5. The combined heat exchanger according to claim 4, characterized in that, The sleeve (11) includes an inner tube (111) and an outer tube (112) arranged coaxially. One of the first channel and the second channel is formed inside the inner tube (111), and the other is formed between the outer wall of the inner tube (111) and the inner wall of the outer tube (112).
6. The combined heat exchanger according to any one of claims 1 to 3, characterized in that, The second heat exchanger (2) includes a cylinder (21) and a heat exchange tube (22), the cylinder (21) having a cavity for containing fluid, and the heat exchange tube (22) being disposed in contact with the wall of the cylinder (21).
7. The combined heat exchanger according to claim 6, characterized in that, The cylinder (21) is provided with a third inlet (211) and a third outlet (212). The heat exchange tube (22) is disposed inside the cylinder (21). The heat exchange tube (22) has a fourth inlet (221) and a fourth outlet (222) extending out of the cylinder (21).
8. The combined heat exchanger according to claim 6, characterized in that, The outer surface of the cylinder (21) is in contact with the sleeve (11), and the cylinder (21) is made of a thermally conductive material.
9. The combined heat exchanger according to claim 6, characterized in that, There is a preset distance between the outer surface of the cylinder (21) and the sleeve (11), and the cylinder (21) is made of thermal insulation material.
10. The combined heat exchanger according to any one of claims 1 to 3, characterized in that, Both the first heat exchanger (1) and the second heat exchanger (2) are equipped with exhaust valves at their tops.
11. The combined heat exchange device according to any one of claims 1 to 3, characterized in that, Both the first heat exchanger (1) and the second heat exchanger (2) are equipped with drain valves at their bottoms.
12. A heat pump unit, characterized in that, The combined heat exchange device as described in any one of claims 1 to 11 further includes a fixing component (5), which is connected to the first heat exchanger (1) and the second heat exchanger (2) respectively.
13. A hot water device, characterized in that, Includes the combined heat exchange device as described in any one of claims 1 to 11; Alternatively, it may include the heat pump unit as described in claim 12.