Heat exchanger and heating and ventilation system

Abstract

The utility model discloses a heat exchanger and a heating and ventilation system, the heat exchanger comprises a shell, a water chamber structure and a pipeline structure, the water chamber structure comprises a first water chamber and a second water chamber which are located at the two opposite ends of the shell, and a plurality of heat exchange pipes communicating with the first water chamber and the second water chamber are arranged in the shell; the first water chamber is provided with a water inlet, a water outlet and a plurality of water passing sub-chambers, the water inlet and the water outlet are communicated with different water passing sub-chambers, and the second water chamber is provided with a plurality of baffling chambers; the pipeline structure comprises a water passing communicating pipe and a baffling communicating pipe, the plurality of water passing sub-chambers are communicated through the water passing communicating pipe, the plurality of baffling chambers are communicated through the baffling communicating pipe, and control valves are arranged on the water passing communicating pipe and the baffling communicating pipe. According to the water chamber structure, the multiple branch chambers which can be communicated through the communicating pipes are arranged in the water chamber structure, the control valves can control connection and disconnection of the communicating pipes, the flow direction of secondary refrigerant water in the different heat exchange pipes can be conveniently controlled, and therefore the heat exchanger can select opening and closing of the control valves, and the heat exchanger can achieve different internal flows.

Description

Technical Field

[0001] This application relates to the technical field of heat exchangers, and particularly to a heat exchanger and a heating, ventilation, and air conditioning (HVAC) system. Background Art

[0002] The heat exchanger in the HVAC system can be used for refrigeration in summer and heating in winter. The switching between the summer refrigeration mode and the winter heating mode is achieved through water circuit switching, and the same water circuit process is shared. The heat exchanger includes multiple heat exchange tubes arranged in parallel, and water chambers are provided at both ends of the heat exchange tubes to facilitate the distribution, concentration, and flow of the coolant water in the water chambers.

[0003] Sometimes, the inlet and outlet temperature differences in the refrigeration mode and the heating mode are different, and the difference in the inlet and outlet temperature differences of the heat exchanger in the heating mode and the refrigeration mode is relatively large, resulting in a large difference in the circulating water flow rate through the heat exchanger in the two modes. However, the heat exchangers in the related art are generally designed according to a fixed process. After the water flow rate changes, the process of the heat exchanger does not change. The large flow rate difference is likely to cause the flow rate of the coolant water to be too low or too high, thereby affecting the heat exchange efficiency and service life. Summary of the Utility Model

[0004] The embodiments of this application provide a heat exchanger and an HVAC system, which can improve the heat exchange efficiency of the heat exchanger.

[0005] In a first aspect, the embodiments of this application provide a heat exchanger, including:

[0006] A housing having a heat exchange cavity, and a plurality of heat exchange tubes arranged at intervals are provided in the heat exchange cavity;

[0007] A water chamber structure including a first water chamber and a second water chamber. The first water chamber and the second water chamber are respectively arranged at opposite ends of the housing. The first water chamber and the second water chamber are connected through the heat exchange tubes. The first water chamber has a water inlet, a water outlet, and a plurality of water distribution chambers. The water inlet and the water outlet are respectively connected to different water distribution chambers. The second water chamber has a plurality of baffle chambers;

[0008] A pipeline structure including a plurality of water passing connecting pipes and at least one baffle connecting pipe. The plurality of water distribution chambers are connected through the water passing connecting pipes, and the plurality of baffle chambers are connected through the baffle connecting pipes. At least one control valve is provided on each of the water passing connecting pipes and the baffle connecting pipes. The control valve is used to control the on-off of the water passing connecting pipes and the baffle connecting pipes.

[0009] In some embodiments of the present application, the water chamber structure further includes a plurality of first partitions disposed in the first water chamber. The first partitions extend in the horizontal direction, and the plurality of first partitions divide the first water chamber into a plurality of water passing chambers arranged vertically; the water chamber structure further includes a second partition disposed in the second water chamber, and the second partition divides the second water chamber into a plurality of baffle chambers arranged vertically.

[0010] In some embodiments of the present application, the plurality of water passing connecting pipes include a first connecting pipe, a second connecting pipe, and a third connecting pipe, and the baffle connecting pipe includes a fourth connecting pipe; three first partitions are provided in the first water chamber, and the first water chamber is sequentially divided into a first compartment, a second compartment, a third compartment, and a fourth compartment that are isolated from each other. The first connecting pipe connects the first compartment and the second compartment, the second connecting pipe connects the second compartment and the third compartment, the third connecting pipe connects the third compartment and the fourth compartment, the water inlet is connected to the first compartment, and the water outlet is connected to the fourth compartment; one second partition is provided in the second water chamber, and the second water chamber is sequentially divided into a first chamber and a second chamber that are isolated from each other. The fourth connecting pipe connects the first chamber and the second chamber.

[0011] In some embodiments of the present application, the plurality of heat exchange pipes include a first group of heat exchange pipes, a second group of heat exchange pipes, a third group of heat exchange pipes, and a fourth group of heat exchange pipes. The first group of heat exchange pipes connects the first compartment and the first chamber; the second group of heat exchange pipes connects the second compartment and the first chamber; the third group of heat exchange pipes connects the third compartment and the second chamber; the fourth group of heat exchange pipes connects the fourth compartment and the second chamber.

[0012] In some embodiments of the present application, the control valves on the first connecting pipe, the second connecting pipe, the third connecting pipe, and the fourth connecting pipe are the first control valve, the second control valve, the third control valve, and the fourth control valve in sequence; when the first control valve, the third control valve, and the fourth control valve are opened and the second control valve is closed, the water inlet is connected to both the first compartment and the second compartment, the water outlet is connected to both the third compartment and the fourth compartment, and the first chamber is connected to the second chamber; when the first control valve, the third control valve, and the fourth control valve are closed and the second control valve is opened, the second compartment is connected to the third compartment.

[0013] In some embodiments of the present application, the pipeline structure further includes an inlet pipe located in the middle of the first connecting pipe. The inlet pipe is connected to the water inlet through the first connecting pipe, and the first control valve is located between the second compartment and the inlet pipe.

[0014] In some embodiments of the present application, the pipeline structure further includes an outlet pipe located in the middle of the third communication pipe. The outlet pipe is communicated with the water outlet through the third communication pipe, and the third control valve is located between the third chamber and the outlet pipe.

[0015] In some embodiments of the present application, one end of the second communication pipe is communicated with the first communication pipe, and the other end of the second communication pipe is communicated with the third communication pipe. The second communication pipe communicates the second chamber and the third chamber through the first communication pipe and the third communication pipe; wherein, the first control valve is located between the second communication pipe and the first chamber, and the third control valve is located between the second communication pipe and the fourth chamber.

[0016] In some embodiments of the present application, each inner side wall of the water passing chamber has a pipe orifice, and both ends of each water passing communication pipe are communicated with one pipe orifice; each inner side wall of the baffle chamber has a pipe orifice, and both ends of each baffle communication pipe are communicated with one pipe orifice.

[0017] In a second aspect, an embodiment of the present application further provides a heating and ventilation system, including a heat source unit, a load unit, and the heat exchanger as described in any one of the above embodiments. A refrigerant circulation loop is formed between the heat source unit and the load unit, and the heat exchanger is arranged on the refrigerant circulation loop.

[0018] Based on the heat exchanger and the heating and ventilation system in the embodiments of the present application, in this embodiment, by arranging a plurality of chambers in the first water chamber and the second water chamber, at the same time, the plurality of chambers can be communicated through the communication pipes, and the control valves can also control the on-off of each communication pipe, which is convenient for controlling the flow direction of the refrigerant water in different heat exchange pipes. Therefore, the heat exchanger can select the opening and closing of the control valves according to the specific working conditions, so that the heat exchanger can realize different internal processes to adapt to the flow rate change caused by the temperature difference change between the inlet water temperature and the outlet water temperature, thereby improving the heat exchange efficiency of the heat exchanger and reducing the loss of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0020] Figure 1 It is a schematic structural diagram of a heat exchanger in an embodiment of the present application;

[0021] Figure 2Schematic diagram of the structure of the first water chamber and the water-passing connecting pipe in an embodiment of the present application;

[0022] Figure 3 Schematic diagram of the structure of the first water chamber in an embodiment of the present application;

[0023] Figure 4 Schematic diagram of the structure of the second water chamber and the baffle connecting pipe in an embodiment of the present application;

[0024] Figure 5 Schematic diagram of the structure of the second water chamber in an embodiment of the present application;

[0025] Figure 6 Schematic diagram of the structure of the heat exchanger realizing two passes in an embodiment of the present application;

[0026] Figure 7 Schematic diagram of the structure of the heat exchanger realizing four passes in an embodiment of the present application.

[0027] Reference numerals:

[0028] 1, heat exchanger;

[0029] 10, housing; 11, heat exchange chamber; 12, heat exchange tubes; 121, first group of heat exchange tubes; 122, second group of heat exchange tubes; 123, third group of heat exchange tubes; 124, fourth group of heat exchange tubes;

[0030] 21, first water chamber; 211, water outlet; 212, water inlet; 213, water-passing sub-chamber; 214, first sub-chamber; 215, second sub-chamber; 216, third sub-chamber; 217, fourth sub-chamber; 218, first pipe orifice; 22, second water chamber; 221, baffle chamber; 222, first chamber; 223, second chamber; 224, second pipe orifice; 23, first partition; 24, second partition;

[0031] 30, pipeline structure; 31, water-passing connecting pipe; 311, first connecting pipe; 311a, first branch pipe; 311b, second branch pipe; 312, second connecting pipe; 313, third connecting pipe; 313c, third branch pipe; 313e, fourth branch pipe; 32, baffle connecting pipe; 321, fourth connecting pipe; 33, water inlet pipe; 34, water outlet pipe;

[0032] 40, control valve; 41, first control valve; 42, second control valve; 43, third control valve; 44, fourth control valve. Detailed implementation manners

[0033] To more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0034] In related technologies, a heat exchanger can be used for refrigeration in summer and heating in winter. Sometimes, the flow rate of the coolant water entering the heat exchange tubes in the heat exchanger varies greatly between winter and summer. Under the same flow design of the heat exchanger, the large flow difference will cause the flow velocity of the coolant water in the heat exchange tubes to be too low or too high, thus affecting the heat exchange efficiency and the service life of the heat exchange tubes.

[0035] In view of the above situation, in the first aspect, please refer to Figures 1 - 3 , the present application provides a heat exchanger 1, including a housing 10, a water chamber structure, and a pipeline structure 30.

[0036] The housing 10 has a heat exchange chamber 11, and a plurality of heat exchange tubes 12 arranged at intervals are provided in the heat exchange chamber 11. The heat exchange tubes 12 can be used for the flow of coolant water.

[0037] The water chamber structure includes a first water chamber 21 and a second water chamber 22. The first water chamber 21 and the second water chamber 22 are respectively arranged at opposite ends of the housing 10. The first water chamber 21 and the second water chamber 22 are connected through the heat exchange tubes 12, so that the coolant water in the first water chamber 21 and the second water chamber 22 can flow through the heat exchange tubes 12 and exchange with each other. The first water chamber 21 has a water inlet 212, a water outlet 211, and a plurality of water distribution chambers 213. The water inlet 212 and the water outlet 211 are respectively connected to different water distribution chambers 213. The coolant water entering the heat exchanger 1 first flows in from the water inlet 212 and enters one of the water distribution chambers 213, and finally flows out from the water outlet 211 on another water distribution chamber 213. The second water chamber 22 has a plurality of baffle chambers 221. Part of the coolant water flowing from the water distribution chamber 213 to the baffle chamber 221 will change direction under the baffle action of the baffle chamber 221 and flow back to the water distribution chamber 213.

[0038] Specifically, there may be multiple water passing chambers 213 and baffle chambers 221. The number of water passing chambers 213 may be different from the number of baffle chambers 221. For example, each water passing chamber 213 is connected to one heat exchange tube 12, and each baffle chamber 221 is connected to two heat exchange tubes 12. Thus, after the coolant water in one heat exchange tube 12 undergoes a baffle in the baffle chamber 221, it can flow into another heat exchange tube 12. Of course, the number of water passing chambers 213 may also be the same as the number of baffle chambers 221, and no specific limitation is made here. Among them, the water inlet 212 is located below the water outlet 211, which can reduce the influence of gravity on the flow of the coolant water and is beneficial to controlling the flow rate of the coolant water in the heat exchanger 1.

[0039] The pipeline structure 30 includes multiple water passing connecting pipes 31 and at least one baffle connecting pipe 32. Multiple water passing chambers 213 are connected through the water passing connecting pipes 31, and multiple baffle chambers 221 are connected through the baffle connecting pipes 32. For example, one water passing connecting pipe 31 can connect two water passing chambers 213, and one baffle connecting pipe 32 can connect two baffle chambers 221. At least one control valve 40 is provided on each water passing connecting pipe 31 and baffle connecting pipe 32, and the control valve 40 is used to control the on-off of the water passing connecting pipe 31 and the baffle connecting pipe 32.

[0040] Specifically, different water passing chambers 213 in the first water chamber 21 can be connected through the water passing connecting pipes 31. At the same time, a control valve 40 can be provided on each water passing connecting pipe 31. Thus, the coolant water in different water passing chambers 213 can flow interactively, and the on-off of the water passing connecting pipe 31 can also be controlled by switching the control valve 40. Similarly, different baffle chambers 221 in the second water chamber 22 can be connected through the baffle connecting pipes 32. At the same time, a control valve 40 can be provided on each baffle connecting pipe 32. Thus, the coolant water in different baffle chambers 221 can flow interactively, and the on-off of the baffle connecting pipe 32 can also be controlled by switching the control valve 40.

[0041] It should be noted that in the embodiment of the present application, by providing multiple chambers in the first water chamber 21 and the second water chamber 22, at the same time, the multiple chambers can be connected through connecting pipes, and the control valve 40 can also control the on-off of each connecting pipe, which is convenient for controlling the flow direction of the coolant water in different heat exchange tubes 12. Thus, the heat exchanger 1 can select the on-off of the control valve 40 according to the specific working conditions, so that the heat exchanger 1 can realize different internal processes to adapt to the flow rate change caused by the temperature difference change between the inlet water temperature and the outlet water temperature of the water inlet 212 and the water outlet 211, thereby improving the heat exchange efficiency of the heat exchanger 1 and reducing the loss of the heat exchanger 1.

[0042] Please refer to Figures 2 - 3, in some embodiments of the present application, the water chamber structure further includes a plurality of first partitions 23 disposed in the first water chamber 21. The first partitions 23 extend in the horizontal direction, and the plurality of first partitions 23 divide the first water chamber 21 into a plurality of water passing chambers 213 arranged vertically. As Figures 4 - 5 shown, the water chamber structure further includes a second partition 24 disposed in the second water chamber 22. The second partition 24 divides the second water chamber 22 into a plurality of baffle chambers 221 arranged vertically, so that the arrangement of the heat exchange tubes 12 inside the housing 10 can be more regular.

[0043] Please continue to refer to Figures 2 - 3 , in some embodiments of the present application, three first partitions 23 are provided in the first water chamber 21. The three first partitions 23 divide the first water chamber 21 into mutually isolated first chambers 214, second chambers 215, third chambers 216 and fourth chambers 217. The first chambers 214, second chambers 215, third chambers 216 and fourth chambers 217 are arranged vertically in sequence. As Figures 4 - 5 shown, one second partition 24 is provided in the second water chamber 22. The second partition 24 divides the second water chamber 22 into isolated first chambers 222 and second chambers 223. The first chambers 222 and second chambers 223 are also arranged vertically in sequence.

[0044] As Figure 2 and Figure 4 shown, the plurality of connecting pipes include a first connecting pipe 311, a second connecting pipe 312, a third connecting pipe 313 and a fourth connecting pipe 321. The water inlet 212 is communicated with the first chamber 214, the water outlet 211 is communicated with the fourth chamber 217, the first connecting pipe 311 communicates the first chamber 214 with the second chamber 215, the second connecting pipe 312 communicates the second chamber 215 with the third chamber 216, the third connecting pipe 313 communicates the third chamber 216 with the fourth chamber 217, and the fourth connecting pipe 321 communicates the first chamber 222 with the second chamber 223. That is to say, in the first water chamber 21, adjacent two chambers are communicated by a connecting pipe. When the connecting pipe is in a conducting state, the fluid between adjacent two chambers can flow mutually; similarly, in the second water chamber 22, adjacent two chambers are also communicated by a connecting pipe. When the connecting pipe is in a conducting state, the fluid between adjacent two chambers can flow mutually.

[0045] Please refer to Figure 6, in some embodiments of the present application, four heat exchange tubes 12 arranged at intervals are provided in the heat exchange chamber 11, which are successively the first group of heat exchange tubes 121, the second group of heat exchange tubes 122, the third group of heat exchange tubes 123, and the fourth group of heat exchange tubes 124. The first sub-chamber 214 is communicated with the first end of the first group of heat exchange tubes 121, the second sub-chamber 215 is communicated with the first end of the second group of heat exchange tubes 122, the third sub-chamber 216 is communicated with the first end of the third group of heat exchange tubes 123, and the fourth sub-chamber 217 is communicated with the first end of the fourth group of heat exchange tubes 124; the first chamber 222 is communicated with the second ends of the first group of heat exchange tubes 121 and the second group of heat exchange tubes 122, and the second chamber 223 is communicated with the second ends of the third group of heat exchange tubes 123 and the fourth group of heat exchange tubes 124.

[0046] Specifically, both the first chamber 222 and the second chamber 223 can play a role in deflecting the coolant water. For example, the fluid entering the first sub-chamber 214 from the water inlet 212 can first flow through the first group of heat exchange tubes 121 to reach the first chamber 222, and after being deflected by the first chamber 222, it flows through the second group of heat exchange tubes 122 to reach the second sub-chamber 215.

[0047] Please refer to Figure 2 and Figure 4 , in some embodiments of the present application, the control valves 40 on the first connecting pipe 311, the second connecting pipe 312, the third connecting pipe 313, and the fourth connecting pipe 321 are successively the first control valve 41, the second control valve 42, the third control valve 43, and the fourth control valve 44, that is, the first control valve 41 is provided on the first connecting pipe 311, the second control valve 42 is provided on the second connecting pipe 312, the third control valve 43 is provided on the third connecting pipe 313, and the fourth control valve 44 is provided on the fourth connecting pipe 321. Among them, each control valve 40 can control the on-off of a connecting pipe.

[0048] It should be noted that, as Figure 2As shown, the first connecting pipe 311 may include a first branch pipe 311a and a second branch pipe 311b. The first branch pipe 311a and the second branch pipe 311b are respectively located on both sides of the first control valve 41. The first branch pipe 311a communicates with the first sub-chamber 214, and the second branch pipe 311b communicates with the second sub-chamber 215. The first control valve 41 controls the on-off between the first branch pipe 311a and the second branch pipe 311b, that is, the first control valve 41 can control the conduction and cut-off between the first sub-chamber 214 and the second sub-chamber 215. The third connecting pipe 313 may include a third branch pipe 313c and a fourth branch pipe 313e. The third branch pipe 313c and the fourth branch pipe 313e are respectively located on both sides of the third control valve 43. The third branch pipe 313c communicates with the third sub-chamber 216, and the fourth branch pipe 313e communicates with the fourth sub-chamber 217. The third control valve 43 controls the on-off between the third branch pipe 313c and the fourth branch pipe 313e, that is, the third control valve 43 can control the conduction and cut-off between the third sub-chamber 216 and the fourth sub-chamber 217.

[0049] In summary, in the first water chamber 21, each sub-chamber communicates with a branch pipe. The two ends of the second connecting pipe 312 can respectively communicate with the second branch pipe 311b and the third branch pipe 313c, so that the second connecting pipe 312 can communicate the second sub-chamber 215 and the third sub-chamber 216, and the second control valve 42 can control the conduction and cut-off between the second sub-chamber 215 and the third sub-chamber 216. Similarly, in the second water chamber 22, each chamber can also communicate with a corresponding branch pipe, and the fourth control valve 44 can control the on-off between the two branch pipes, thereby controlling the conduction and cut-off between the first chamber 222 and the second chamber 223.

[0050] As Figure 6As shown in the figure, when the first control valve 41, the third control valve 43 and the fourth control valve 44 are opened and the second control valve 42 is closed, the water inlet 212 is communicated with both the first chamber 214 and the second chamber 215. Therefore, the fluid entering from the water inlet 212 can be divided into two branches. One branch flows from the water inlet 212 into the first chamber 214, and the other branch flows into the second chamber 215 through the first connecting pipe 311. Subsequently, the branches in the first chamber 214 and the second chamber 215 respectively flow through the first group of heat exchange tubes 121 and the second group of heat exchange tubes 122, then merge and reach the first chamber 222. Also, since the first chamber 222 is communicated with the second chamber 223, the fluid in the first chamber 222 flows into the second chamber 223 through the fourth connecting pipe 321. Subsequently, the fluid in the second chamber 223 is divided into two branches and enters the third group of heat exchange tubes 123 and the fourth group of heat exchange tubes 124, and simultaneously flows to the third chamber 216 and the fourth chamber 217. Finally, the branch in the fourth chamber 217 flows out from the water outlet 211. Also, since the water outlet 211 is communicated with both the third chamber 216 and the fourth chamber 217, the branch in the third chamber 216 can also flow out from the water outlet 211 through the third connecting pipe 313. To sum up, after the fluid entering from the water inlet 212 of the first water chamber 21 flows through two processes and merges, it flows out of the heat exchanger 1 through the water outlet 211 of the first water chamber 21. At this time, the water flow system in the heat exchanger 1 is a two-process system.

[0051] As Figure 7 shown in the figure, when the first control valve 41, the third control valve 43 and the fourth control valve 44 are closed and the second control valve 42 is opened, all the fluid entering from the water inlet 212 flows into the first chamber 214. Subsequently, the fluid in the first chamber 214 flows through the first group of heat exchange tubes 121 to reach the first chamber 222. Since the fourth control valve 44 is closed, the fluid in the first chamber 222 cannot flow into the second chamber 223. Therefore, after the fluid in the first chamber 222 undergoes a baffle in the first chamber 222, it reaches the second chamber 215 from the second group of heat exchange tubes 122. Since the second chamber 215 is communicated with the third chamber 216, the fluid in the second chamber 215 can flow through the second connecting pipe 312 to reach the third chamber 216, and flow from the third chamber 216 through the third group of heat exchange tubes 123 to reach the second chamber 223. After the fluid in the second chamber 223 undergoes a baffle in the second chamber 223, it reaches the fourth chamber 217 from the fourth group of heat exchange tubes 124. Since the third control valve 43 is closed, the fluid in the fourth chamber 217 directly flows out from the water outlet 211. To sum up, after the fluid entering from the water inlet 212 of the first water chamber 21 undergoes the baffle effects of the first chamber 222 and the second chamber 223 in sequence and flows through four processes, it flows out of the heat exchanger 1 through the water outlet 211 of the first water chamber 21. At this time, the water flow system in the heat exchanger 1 is a four-process system.

[0052] Further, please refer to Figure 2 In some embodiments of the present application, the pipeline structure 30 further includes a water inlet pipe 33 and a water outlet pipe 34. The water inlet pipe 33 is located in the middle of the first communication pipe 311. The water inlet pipe 33 is communicated with the water inlet 212 through the first communication pipe 311. The first control valve 41 is located between the second chamber 215 and the water inlet pipe 33.

[0053] It can be understood that external fluid flows into the heat exchanger 1 from the water inlet pipe 33. The water inlet pipe 33 is arranged in the middle of the first communication pipe 311, so that the distance from the water inlet pipe 33 to the first chamber 214 is the same as the distance from the water inlet pipe 33 to the second chamber 215. Therefore, when the water flow system in the heat exchanger 1 is a two-pass system, the fluid flowing in from the water inlet pipe 33 can almost reach the first chamber 214 and the second chamber 215 at the same time, and flow from the first chamber 214 and the second chamber 215 to the first cavity 222 at the same time.

[0054] Please continue to refer to Figure 2 The water outlet pipe 34 is located in the middle of the third communication pipe 313. The water outlet pipe 34 is communicated with the water outlet 211 through the third communication pipe 313. The third control valve 43 is located between the third chamber 216 and the water outlet pipe 34.

[0055] Similarly, it can be known that the fluid in the heat exchanger 1 finally flows out from the water outlet pipe 34. The water outlet pipe 34 is arranged in the middle of the third communication pipe 313, so that the distance from the third chamber 216 to the water outlet pipe 34 is the same as the distance from the fourth chamber 217 to the water outlet pipe 34. Therefore, when the water flow system in the heat exchanger 1 is a two-pass system, the fluid flowing out from the third chamber 216 and the fourth chamber 217 can almost merge and flow out of the water outlet pipe 34 before reaching the water outlet pipe 34 at the same time.

[0056] Please refer to Figure 2 In some embodiments of the present application, one end of the second communication pipe 312 is communicated with the first communication pipe 311, and the other end of the second communication pipe 312 is communicated with the third communication pipe 313. The second communication pipe 312 communicates the second chamber 215 and the third chamber 216 through the first communication pipe 311 and the third communication pipe 313; wherein, the first control valve 41 is located between the second communication pipe 312 and the first chamber 214, and the third control valve 43 is located between the second communication pipe 312 and the fourth chamber 217.

[0057] It can be understood that both ends of the first communication pipe 311 communicate with the first sub-chamber 214 and the second sub-chamber 215 respectively, both ends of the third communication pipe 313 communicate with the third sub-chamber 216 and the fourth sub-chamber 217 respectively, and both ends of the second communication pipe 312 communicate with the first communication pipe 311 and the third communication pipe 313 respectively. Therefore, the setting and installation of the second communication pipe 312 are more convenient. At the same time, as Figure 3 and Figure 5 shown, only one pipe orifice can be opened on the inner sidewall of each water-passing sub-chamber 213, so that both ends of each water-passing communication pipe 31 communicate with a corresponding pipe orifice, thereby reducing the pipe orifices on the inner sidewall of the water-passing sub-chamber 213 to reduce the probability of water leakage in the first water chamber 21. Similarly, there is a pipe orifice on the inner sidewall of each baffle chamber 221, and both ends of each baffle communication pipe 32 communicate with a corresponding pipe orifice, thereby reducing the pipe orifices on the inner sidewall of the baffle chamber 221 to reduce the probability of water leakage in the second water chamber 22.

[0058] In a second aspect, an embodiment of the present application further provides a heating and ventilation system, including a heat source unit, a load unit, and the heat exchanger 1 as described in any one of the above embodiments. A refrigerant circulation loop is formed between the heat source unit and the load unit, and the heat exchanger 1 is arranged on the refrigerant circulation loop. The heat source unit and the load unit realize refrigeration and heating cycles through different processes in the heat exchanger 1. At the same time, through different process responses inside the heat exchanger 1, it adapts to the flow rate change caused by the temperature difference change between the inlet 212 and the outlet 211, improves the heat exchange efficiency of the heat exchanger 1, and further improves the refrigeration or heating efficiency of the heating and ventilation system. Among them, the heating and ventilation system includes, but is not limited to, systems for heating or refrigeration such as central air conditioners, multi-split air conditioners, and heat pumps. The embodiments of the present application do not make any limitations in this regard.

[0059] In the drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for exemplary illustration and cannot be understood as a limitation of the present application. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0060] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A heat exchanger, characterized in that, Comprising: A housing having a heat exchange chamber, in which a plurality of heat exchange tubes are arranged at intervals; A water chamber structure including a first water chamber and a second water chamber. The first water chamber and the second water chamber are respectively arranged at opposite ends of the housing. The first water chamber and the second water chamber are connected through the heat exchange tubes. The first water chamber has a water inlet, a water outlet and a plurality of water passing sub-chambers. The water inlet and the water outlet are respectively communicated with different water passing sub-chambers. The second water chamber has a plurality of baffle chambers; A pipeline structure including a plurality of water passing connecting pipes and at least one baffle connecting pipe. The plurality of water passing sub-chambers are connected through the water passing connecting pipes, and the plurality of baffle chambers are connected through the baffle connecting pipes. At least one control valve is provided on each of the water passing connecting pipes and the baffle connecting pipes. The control valve is used to control the on-off of the water passing connecting pipes and the baffle connecting pipes.

2. The heat exchanger according to claim 1, characterized in that, The water chamber structure further includes a plurality of first partitions arranged in the first water chamber. The first partitions extend in the horizontal direction, and the plurality of first partitions divide the first water chamber into a plurality of the water passing sub-chambers arranged vertically; The water chamber structure further includes a second partition arranged in the second water chamber. The second partition divides the second water chamber into a plurality of the baffle chambers arranged vertically.

3. The heat exchanger according to claim 2, wherein The plurality of water passing connecting pipes include a first connecting pipe, a second connecting pipe and a third connecting pipe. The baffle connecting pipe includes a fourth connecting pipe; Three first partitions are arranged in the first water chamber, which sequentially divide the first water chamber into a first sub-chamber, a second sub-chamber, a third sub-chamber and a fourth sub-chamber that are isolated from each other. The first connecting pipe connects the first sub-chamber and the second sub-chamber, the second connecting pipe connects the second sub-chamber and the third sub-chamber, the third connecting pipe connects the third sub-chamber and the fourth sub-chamber, the water inlet is communicated with the first sub-chamber, and the water outlet is communicated with the fourth sub-chamber; One second partition is arranged in the second water chamber, which sequentially divides the second water chamber into a first chamber and a second chamber that are isolated from each other. The fourth connecting pipe connects the first chamber and the second chamber.

4. The heat exchanger according to claim 3, characterized in that, The plurality of heat exchange tubes include: A first group of heat exchange tubes connecting the first sub-chamber and the first chamber; A second group of heat exchange tubes connecting the second sub-chamber and the first chamber; A third group of heat exchange tubes connecting the third sub-chamber and the second chamber; A fourth group of heat exchange tubes connecting the fourth sub-chamber and the second chamber.

5. The heat exchanger according to claim 3, wherein The control valves on the first connecting pipe, the second connecting pipe, the third connecting pipe and the fourth connecting pipe are the first control valve, the second control valve, the third control valve and the fourth control valve in sequence; When the first control valve, the third control valve and the fourth control valve are opened and the second control valve is closed, the water inlet is communicated with both the first sub-chamber and the second sub-chamber, the water outlet is communicated with both the third sub-chamber and the fourth sub-chamber, and the first chamber is communicated with the second chamber; When the first control valve, the third control valve and the fourth control valve are closed and the second control valve is open, the second sub-chamber communicates with the third sub-chamber.

6. The heat exchanger according to claim 5, characterized in that, The pipeline structure further includes: A water inlet pipe, located in the middle of the first connecting pipe. The water inlet pipe communicates with the water inlet through the first connecting pipe, and the first control valve is located between the second sub-chamber and the water inlet pipe.

7. The heat exchanger according to claim 5, characterized in that The pipeline structure further includes: A water outlet pipe, located in the middle of the third connecting pipe. The water outlet pipe communicates with the water outlet through the third connecting pipe, and the third control valve is located between the third sub-chamber and the water outlet pipe.

8. The heat exchanger according to claim 3, wherein, One end of the second connecting pipe communicates with the first connecting pipe, and the other end of the second connecting pipe communicates with the third connecting pipe. The second connecting pipe communicates with the second sub-chamber and the third sub-chamber through the first connecting pipe and the third connecting pipe; Wherein, the first control valve is located between the second connecting pipe and the first sub-chamber, and the third control valve is located between the second connecting pipe and the fourth sub-chamber.

9. The heat exchanger according to claim 1, characterized in that, Each inner side wall of the water passing sub-chamber has a first pipe orifice, and both ends of each water passing connecting pipe communicate with one of the first pipe orifices; Each inner side wall of the baffle chamber has a second pipe orifice, and both ends of each baffle connecting pipe communicate with one of the second pipe orifices.

10. A heating, ventilation and air conditioning (HVAC) system, characterized in that, Including: A heat source unit; A load unit; And The heat exchanger according to any one of claims 1 to 9, a refrigerant circulation loop is formed between the heat source unit and the load unit, and the heat exchanger is arranged on the refrigerant circulation loop.

Images