Heat exchange system, control method thereof and air conditioner

Abstract

The invention discloses a heat exchange system, a humidifying method thereof and an air conditioner, and relates to the technical field of life electric appliances, the heat exchange system comprises a refrigerant circulation pipeline, an auxiliary circulation pipeline and a humidifying pipeline, and the refrigerant circulation pipeline is used for refrigerant circulation; the auxiliary circulating pipeline and at least part of the refrigerant circulating pipeline are arranged in parallel so as to distribute the refrigerant from the refrigerant circulating pipeline; the humidification pipeline is used for circulation of humidification water and comprises a heat exchange part and a vaporization part which are sequentially arranged in the circulation direction of the humidification water, the heat exchange part is connected with at least part of the auxiliary circulation pipeline in a heat exchange mode and used for preheating the humidification water, and the vaporization part is used for secondary heating of the humidification water so that the humidification water can be heated and vaporized. According to the technical scheme, the energy consumption of the humidifying module can be reduced, and the energy-saving effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and in particular to a heat exchange system and its control method, and an air conditioner. Background Technology

[0002] In air conditioners, such as ducted air conditioners, the humidification piping is typically installed separately outside the indoor unit and is independent of the refrigerant circulation piping. This humidification piping includes a heating module that electrically heats the water for humidification, converting it into steam. The steam is then transported to the indoor unit via a steam delivery pipe and distributed into the room through the unit's air outlet. Because the humidification piping uses a separate heating module for vaporization, it requires a high-power heating module, and the module's energy conversion efficiency is relatively low, resulting in high energy consumption for the humidification module. Summary of the Invention

[0003] The main objective of this invention is to propose a heat exchange system and its control method, as well as an air conditioner, which aims to preheat the humidification water in the humidification pipeline through the refrigerant circulation pipeline to achieve energy-saving effects.

[0004] To achieve the above objectives, the heat exchange system proposed in this invention includes:

[0005] Refrigerant circulation piping is used for refrigerant circulation.

[0006] An auxiliary circulation line, at least partially connected in parallel with the refrigerant circulation line, is provided to divert refrigerant from the refrigerant circulation line; and

[0007] A humidification pipeline is used for the flow of humidification water. The humidification pipeline includes a heat exchange section and a vaporization section arranged sequentially along the flow direction of the humidification water. The heat exchange section is at least partially heat-connected to the auxiliary circulation pipeline for preheating the humidification water. The vaporization section is used for secondary heating of the humidification water to heat and vaporize the humidification water.

[0008] In one embodiment, the refrigerant circulation pipeline includes a compressor, a four-way valve, an indoor heat exchanger, and an outdoor heat exchanger connected in sequence.

[0009] The auxiliary circulation pipeline is connected in parallel between the four-way valve and the indoor heat exchanger.

[0010] In one embodiment, the refrigerant circulation pipeline includes a compressor, a four-way valve, an indoor heat exchanger, and an outdoor heat exchanger connected in sequence.

[0011] The auxiliary circulation pipeline is connected in parallel between the compressor's exhaust port and the indoor heat exchanger.

[0012] In one embodiment, the refrigerant circulation pipeline is equipped with a control valve for controlling the refrigerant flow rate of the refrigerant circulation pipeline.

[0013] In one embodiment, the humidification pipeline further includes a return section for diverting the preheated humidification water downstream of the heat exchange section, so that at least a portion of the humidification water flows back to the upstream of the heat exchange section.

[0014] The present invention also proposes an air conditioner including a heat exchange system as described above, the heat exchange system including an indoor heat exchange section and an outdoor heat exchange section, wherein the vaporization section of the heat exchange system is disposed in the indoor heat exchange section.

[0015] In one embodiment, the indoor heat exchange section includes:

[0016] Housing, the housing being provided with an air outlet; and

[0017] A fan is disposed inside the housing and spaced apart from the air outlet, for blowing air toward the air outlet;

[0018] The vaporization section includes a heating module located inside the housing and has a steam outlet located between the air outlet and the fan, for outputting steam to the air delivery path of the fan.

[0019] At least a portion of the heat exchange section and auxiliary circulation pipeline of the heat exchange system are disposed in the indoor heat exchange section and are connected to each other for heat exchange.

[0020] The present invention also proposes a humidification method based on the heat exchange system described above, comprising the following steps:

[0021] Control the humidification pipeline to obtain the liquid temperature of the humidification water at the inlet end of the vaporization section;

[0022] The refrigerant flow rate of the auxiliary circulation pipeline is controlled according to the relationship between the liquid temperature and the preset temperature range.

[0023] In one embodiment, the step of "controlling the refrigerant flow rate of the auxiliary circulation pipeline according to the relationship between the liquid temperature and the preset temperature range" includes:

[0024] When the liquid temperature is greater than or equal to the maximum critical value of the preset temperature range, the auxiliary circulation pipeline is shut off.

[0025] When the liquid temperature is less than the maximum critical value of the preset temperature range, the auxiliary circulation pipeline is controlled to be turned on.

[0026] In one embodiment, the preset temperature range includes a first temperature range and a second temperature range, wherein the maximum critical value of the first temperature range is equal to the minimum critical value of the second temperature range; the step of "controlling the liquid flow rate of the inlet section and the heat exchange section of the heat exchange system according to the relationship between the first liquid temperature and the preset temperature range" includes:

[0027] When the liquid temperature is less than the minimum critical value of the first temperature range, the refrigerant flow rate of the auxiliary circulation pipeline is controlled to be the first flow rate L1;

[0028] When the liquid temperature is greater than or equal to the minimum critical value of the first temperature range and less than the maximum critical value of the first temperature range, the refrigerant flow rate of the auxiliary circulation pipeline is controlled to be the second flow rate L2, where the second flow rate L2 is less than the first flow rate L1.

[0029] When the liquid temperature is greater than or equal to the minimum critical value of the second temperature range and less than the maximum critical value of the second temperature range, the refrigerant flow rate of the auxiliary circulation pipeline is controlled to be a third flow rate L3, which is less than the second flow rate L2.

[0030] In one embodiment, after the step of "controlling the liquid flow rate upstream of the heat exchange section and the liquid flow rate of the return section according to the relationship between the first liquid temperature and the preset temperature range", the method includes:

[0031] Based on the relationship between the liquid temperature and the preset temperature range, control the opening of the electronic expansion valve of the refrigerant circulation pipeline and / or the liquid flow rate of the humidification pipeline.

[0032] The heat exchange system proposed in this invention includes a refrigerant circulation pipeline for circulating refrigerant and a humidification pipeline for circulating humidification water, as well as an auxiliary circulation pipeline arranged in parallel with at least a portion of the refrigerant heat exchange pipeline. The humidification pipeline includes a heat exchange section and a vaporization section arranged sequentially along the flow direction of the humidification water, with at least a portion of the heat exchange section and the auxiliary circulation pipeline heat-exchange connected. In this way, high-temperature refrigerant can be diverted from the refrigerant circulation pipeline through the auxiliary circulation pipeline, and heat transfer between the refrigerant and the humidification water can be achieved through heat exchange between the auxiliary circulation pipeline and the heat exchange section. The humidification water is preheated by the heat exchange section and then further heated and vaporized by the vaporization section. Since the energy conversion efficiency of the refrigerant circulation pipeline is higher than that of the humidification module, the method of using the refrigerant's thermal energy to heat the humidification water by diverting the refrigerant in the refrigerant circulation pipeline has lower energy consumption, achieving rational utilization of thermal energy in the heat exchange system, thereby reducing the overall energy consumption of the heat exchange system and achieving energy saving. Furthermore, by diverting a portion of the refrigerant to the auxiliary circulation pipeline and then exchanging heat with the humidification pipeline, the installation position of the auxiliary circulation pipeline can be flexibly set without affecting the other structures of the refrigerant circulation pipeline, so as to facilitate its heat exchange connection with the heating pipeline, thereby improving the installation flexibility of the auxiliary circulation pipeline. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of a structure of an embodiment of the heat exchange system provided by the present invention;

[0035] Figure 2 This is a schematic diagram of another embodiment of the heat exchange system provided by the present invention;

[0036] Figure 3 A flowchart illustrating an embodiment of an air conditioner indoor unit provided by the present invention;

[0037] Figure 4 A flowchart of another embodiment of the air conditioner indoor unit provided by the present invention.

[0038] Explanation of icon numbers:

[0039] 100. Heat exchange system; 10. Refrigerant circulation pipeline; 11. Compressor; 12. Four-way valve; 13. Indoor heat exchanger; 14. Outdoor heat exchanger; 20. Auxiliary circulation pipeline; 21. Control valve; 30. Humidification pipeline; 31. Heat exchange section; 32. Vaporization section; 33. Liquid inlet section; 331. Control pump; 332. Liquid inlet module.

[0040] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0042] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0043] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0044] In air conditioners, such as ducted air conditioners, the humidification piping is typically installed separately outside the indoor unit and is independent of the refrigerant circulation piping. This humidification piping includes a heating module that electrically heats the water for humidification, converting it into steam. The steam is then transported to the indoor unit via a steam delivery pipe and distributed into the room through the unit's air outlet. Because the humidification piping uses a separate heating module for vaporization, it requires a high-power heating module, and the module's energy conversion efficiency is relatively low, resulting in high energy consumption for the humidification module.

[0045] Based on the above problems, this invention proposes a heat exchange system for air conditioners, which aims to preheat the humidification water in the humidification pipeline through the refrigerant circulation pipeline to achieve energy-saving effect.

[0046] Please see Figure 1 , Figure 2 In one embodiment of the present invention, the heat exchange system 100 includes a refrigerant circulation pipeline 10, an auxiliary circulation pipeline 20, and a humidification pipeline 30. The refrigerant circulation pipeline 10 is used for refrigerant circulation. The auxiliary circulation pipeline 20 is arranged in parallel with at least a portion of the refrigerant circulation pipeline 10 to divert the refrigerant from the refrigerant circulation pipeline 10. The humidification pipeline 30 is used for humidification water circulation. The humidification pipeline 30 includes a heat exchange section 31 and a vaporization section 32 arranged sequentially along the flow direction of the humidification water. The heat exchange section 31 is heat-exchange connected to at least a portion of the auxiliary circulation pipeline 20 for preheating the humidification water. The vaporization section 32 is used for secondary heating of the humidification water to heat and vaporize the humidification water.

[0047] It is understood that the heat exchange system 100 proposed in the technical solution of the present invention includes a refrigerant circulation pipeline 10 for circulating refrigerant and a humidification pipeline 30 for circulating humidification water, and also includes an auxiliary circulation pipeline 20 arranged in parallel with at least a portion of the refrigerant heat exchange pipeline; the humidification pipeline 30 includes a heat exchange section 31 and a vaporization section 32 arranged sequentially along the flow direction of the humidification water, and at least a portion of the heat exchange section 31 and the auxiliary circulation pipeline 20 are heat-exchange connected. In this way, high-temperature refrigerant can be diverted from the refrigerant circulation pipeline 10 through the auxiliary circulation pipeline 20, and then heat transfer between the refrigerant and the humidification water can be achieved through heat exchange between the auxiliary circulation pipeline 20 and the heat exchange section 31, so that the humidification water is preheated by the heat exchange section 31 first, and then the humidification water is heated and vaporized again by the vaporization section 32. Since the energy conversion efficiency of the refrigerant circulation pipe 10 is higher than that of the humidification module, the method of diverting the refrigerant in the refrigerant circulation pipe 10 to heat the humidification water using the refrigerant's thermal energy has lower energy consumption. This achieves the rational use of thermal energy in the heat exchange system 100, thereby helping to reduce the overall energy consumption of the heat exchange system 100 and achieving the goal of energy saving. Furthermore, by diverting a portion of the refrigerant to the auxiliary circulation pipe 20 and then exchanging heat with the humidification pipe 30, the auxiliary circulation pipe 20 can be flexibly positioned without affecting the other structures of the refrigerant circulation pipe 10, facilitating its heat exchange connection with the heating pipe, thus improving the installation flexibility of the auxiliary circulation pipe 20.

[0048] In this embodiment, the heat exchange section 31 includes a heat exchange module for connecting the heat exchange section 31 with at least a portion of the auxiliary circulation pipeline 20. In practical applications, the heat exchange module can specifically be a shell-and-tube heat exchanger, such as a coaxial heat exchanger. The coaxial heat exchanger has a first flow channel and a second flow channel formed within it, spaced apart, for respectively circulating humidifying water and refrigerant. This allows the refrigerant and humidifying water to flow through the coaxial heat exchanger simultaneously. When the temperature of the refrigerant is higher than the temperature of the humidifying water, the refrigerant can exchange heat with the humidifying water, raising the temperature of the humidifying water and achieving a preheating effect.

[0049] In practical applications, the heat exchange module can also be a regenerative heat exchanger. The heat storage material in the regenerative heat exchanger can absorb the heat from the high-temperature refrigerant in the refrigerant circulation pipe 10 to store energy, and use the stored heat to preheat the humidification water. In practical applications, the heat exchanger can also be a fluid-connected indirect heat exchanger, etc., without specific limitations.

[0050] In this embodiment, the vaporization unit 32 includes a heating module. In practical applications, the heating module can be an electric heating humidifier, which can heat the humidifying water by converting electrical energy into heat energy, thereby causing the water to boil and turn into water vapor.

[0051] Please see Figure 1 , Figure 2 In an embodiment of the present invention, the auxiliary circulation pipeline 20 includes a heat-conducting pipe for circulating refrigerant; the heat exchange section 31 includes a heat exchange pipe, which is sleeved on at least part of the heat-conducting pipe and forms a liquid passage with the heat-conducting pipe for circulating humidifying water so that the humidifying water absorbs heat from the refrigerant.

[0052] In this embodiment, the shell-and-tube heat exchanger includes a heat-conducting tube and a heat exchange tube sleeved on the heat-conducting tube. A first flow channel is formed inside the heat-conducting tube, and a second flow channel is formed between the heat exchange tube and the heat-conducting tube. The first and second flow channels are spaced apart and used for the flow of humidifying water and refrigerant, respectively. Furthermore, by sleeved on the heat-conducting tube, the humidifying water can be enveloped around the refrigerant during the heat absorption process of heat exchange. This helps to prevent heat from the high-temperature refrigerant from escaping to the external environment and ensures the heat exchange efficiency between the refrigerant and the humidifying water.

[0053] Please see Figure 1 , Figure 2 In an embodiment of the present invention, the heat-conducting pipe includes a plurality of first sub-pipes arranged side by side, the plurality of first sub-pipes being arranged at intervals in sequence, and the plurality of first sub-pipes being arranged in series end to end in sequence; the heat exchange pipe includes a plurality of second sub-pipes arranged side by side, each second sub-pipe being sleeved on a first sub-pipe, and the plurality of second sub-pipes being arranged in series end to end in sequence.

[0054] This configuration allows for sufficient heat exchange between the refrigerant and the humidifying water through several first sub-pipes and several second sub-pipes, ensuring the preheating effect of the high-temperature refrigerant on the humidifying water.

[0055] Please see Figure 1 , Figure 2 In one embodiment of the present invention, the refrigerant circulation pipeline 10 includes a compressor 11, a four-way valve 12, an indoor heat exchanger 13 and an outdoor heat exchanger 14 connected in sequence; the auxiliary circulation pipeline 20 is arranged in parallel between the exhaust port of the compressor 11 and the indoor heat exchanger 13.

[0056] Optionally, the air conditioner has a heating mode and a cooling mode. In cooling mode, the refrigerant flows from the discharge port of the compressor 11 in the refrigerant circulation pipeline 10 to the four-way valve 12, and then flows sequentially through the outdoor heat exchanger 14, the throttling device, and the indoor heat exchanger 13, so that it successively condenses and releases heat and absorbs heat through the outdoor heat exchanger 14 and the indoor heat exchanger 13, and finally flows back to the return port of the compressor 11 through the four-way valve 12.

[0057] In heating mode, the refrigerant circulation pipeline 10 can be reversed by the four-way valve 12. After the four-way valve 12 is reversed, the refrigerant flows from the exhaust port of the compressor 11 to the four-way valve 12, and then flows through the indoor heat exchanger 13, the throttling device and the outdoor heat exchanger 14 in sequence, so as to condense and release heat and evaporate and absorb heat in sequence through the indoor heat exchanger 13 and the outdoor heat exchanger 14, and finally flows back to the return port of the compressor 11 through the four-way valve 12.

[0058] It should be noted that, since the auxiliary circulation pipe 20 is connected in parallel between the exhaust port of the compressor 11 and the indoor heat exchanger 13, during the humidification process of the air conditioner, the high-temperature refrigerant output by the compressor 11 can be diverted from the refrigerant circulation pipe 10 to the auxiliary circulation pipe 20 before exchanging heat with the indoor heat exchanger 13 or the outdoor heat exchanger 14, so as to exchange heat with the heat exchange section 31 of the humidification pipe 30, and then be collected back onto the refrigerant circulation pipe 10.

[0059] As examples, in heating mode, the refrigerant collected and returned to the refrigerant circulation pipe 10 can pass through the indoor heat exchanger 13 and the outdoor heat exchanger 14 successively along the refrigerant circulation pipe 10 for heat exchange, and then flow back to the return port of the compressor 11 through the four-way valve 12. In this way, the auxiliary circulation pipe 20 and the humidification pipe 30 can have a better heat exchange effect while minimizing the impact on the heat exchange process of the refrigerant circulation pipe 10 itself.

[0060] As an example, in cooling mode, the refrigerant that flows back to the refrigerant circulation line 10 can be combined with the remaining refrigerant that has exchanged heat with the indoor heat exchanger 13 and the outdoor heat exchanger 14, and then flow back to the return port of the compressor 11 through the four-way valve 12.

[0061] In another embodiment of the present invention, the refrigerant circulation pipeline 10 includes a compressor 11, a four-way valve 12, an indoor heat exchanger 13 and an outdoor heat exchanger 14 connected in sequence; the auxiliary circulation pipeline 20 is arranged in parallel between the four-way valve 12 and the indoor heat exchanger 13.

[0062] It should be noted that, since the auxiliary circulation pipe 20 is connected in parallel between the four-way valve 12 and the indoor heat exchanger 13, during the humidification process of the air conditioner, only when the air conditioner is in heating mode can the high-temperature refrigerant output by the compressor 11 be diverted from the refrigerant circulation pipe 10 to the auxiliary circulation pipe 20 during the flow from the four-way valve 12 to the indoor heat exchanger 13, so as to exchange heat with the heat exchange section 31 of the humidification pipe 30, and then be collected back to the refrigerant circulation pipe 10 to be combined with the remaining refrigerant, and then pass through the indoor heat exchanger 13 and the outdoor heat exchanger 14 in sequence for heat exchange, and then flow back to the return port of the compressor 11 through the four-way valve 12.

[0063] Since the refrigerant flow rate in the auxiliary circulation pipe 20 is less than the refrigerant flow rate in the part of the refrigerant circulation pipe 10 connected in parallel with the auxiliary circulation pipe 20 per unit time, the amount of refrigerant used for heat exchange accounts for a smaller proportion of the total refrigerant. Therefore, it can be avoided that the refrigerant loses too much heat before exchanging heat with the indoor heat exchanger 13 in the heating mode. In this way, the auxiliary circulation pipe 20 and the humidification pipe 30 can have a better heat exchange effect while reducing the impact on the heat exchange process of the refrigerant circulation pipe 10 itself.

[0064] Please see Figure 1 , Figure 2 In an embodiment of the present invention, the refrigerant circulation pipeline 10 is provided with a control valve 21 for controlling the refrigerant flow rate of the refrigerant circulation pipeline 10.

[0065] In one embodiment of the present invention, the control valve 21 can be set to open and close, and the humidification water flow rate in the humidification pipeline 30 can be controlled by controlling the ratio of the opening and closing time of the control valve 21 within a unit time.

[0066] In practical applications, when the air conditioner is in heating mode, control valve 21 can be opened, allowing the refrigerant in the auxiliary circulation pipe 20 to exchange heat normally with the humidification pipe 30. When the air conditioner is in cooling mode, control valve 21 can be closed, reducing the refrigerant flow in the auxiliary circulation pipe 20 to zero and stopping heat exchange with the humidification pipe 30. This avoids heat exchange between the low-temperature or room-temperature refrigerant and the humidification water in the humidification pipe 30, which would lower the temperature of the humidification water and increase the vaporization time required for the humidification water at the heating module of the vaporization section 32.

[0067] In another embodiment of the present invention, the control valve 21 may also be a variable flow solenoid valve, which can realize the flow regulation function at different levels.

[0068] Please see Figure 1 In one embodiment of the present invention, the liquid inlet section 33 further includes a liquid inlet module 332, which is connected in series upstream of the control pump 331. The liquid inlet module 332 also includes a water supply tank, which is connected to the control pump 331. The water supply tank is equipped with a water level detection mechanism and a water quality detection mechanism for detecting the water level and water quality of the humidification water, respectively. With this configuration, the humidification water in the water supply tank can be pumped to the inlet of the heat exchange section 31 by the control pump 331. The water level detection mechanism ensures that there is sufficient humidification water in the water supply tank to achieve the normal humidification function of the air conditioner. In addition, the water quality detection mechanism can detect the water quality in the water supply tank to avoid excessive calcium and magnesium ion content in the humidification water.

[0069] Please see Figure 2In one embodiment of the present invention, the liquid inlet module 332 includes a water supply pipe, which is connected to a purifier and a control pump 331. This configuration allows the purifier to clean the humidifying water supplied by the water supply pipe, thus preventing excessive levels of calcium and magnesium ions in the humidifying water.

[0070] As examples, the water supply pipe can be directly connected to an external water source, thereby continuously supplying water to the humidification pipe 30 through the external water source.

[0071] Please see Figure 1 , Figure 2 In an embodiment of the present invention, the humidification pipeline 30 further includes a liquid inlet 33, which is connected in series upstream of the heat exchange section 31; the liquid inlet 33 includes a control pump 331, which can be turned on and off to control the humidification pipeline 30 to be open or closed.

[0072] With this configuration, humidifying water can be pumped to the inlet of the heat exchange section 31 via the control pump 331, and the passage of the humidification pipeline 30 can be controlled by opening and closing the control pump 331. Specifically, when the control pump 331 is turned on, the liquid inlet section 33 is in a conductive state, and humidifying water can enter the inlet of the heat exchange section 31 through the liquid inlet section 33; when the control pump 331 is turned off, the liquid inlet section 33 is in an isolated state.

[0073] Optionally, the humidification water flow rate on the liquid inlet section 33 can be controlled by controlling the ratio of the time the pump 331 is turned on and off within a unit of time.

[0074] In another embodiment of the present invention, the humidification pipeline 30 further includes a return section (not shown), which is used to divert the preheated humidification water downstream of the heat exchange section 31 so that at least a portion of the humidification water flows back to the upstream of the heat exchange section 31.

[0075] With this configuration, the reflux section and the heat exchange section 31 can be connected to form a circulation loop, so that at least part of the humidifying water circulates between the reflux section and the heat exchange section 31 through the circulation loop. In this way, part of the humidifying water can flow through the heat exchange section 31 multiple times through the circulation loop to achieve multiple heating, thereby ensuring the preheating effect of the humidifying water and making full use of the heat energy in the refrigerant circulation pipeline 10 to further achieve energy saving effect.

[0076] In practical applications, a control pump 331 may also be provided on the reflux section and / or vaporization section 32 to control the opening and closing of the reflux section and / or vaporization section 32.

[0077] In another embodiment of the present invention, the humidification pipeline 30 further includes a liquid storage section (not shown in the figure), the liquid storage section includes an inlet and a first outlet, the inlet and the first outlet are respectively connected to the outlet end of the heat exchange section 31 and the inlet end of the vaporization section 32, and the liquid storage section is used to store the humidification water after preheating.

[0078] The liquid storage section also includes a second liquid outlet, the inlet end of the reflux section is connected to the second liquid outlet, and the outlet end of the reflux section is connected to the liquid inlet of the heat exchange section 31.

[0079] With this configuration, the circulation loop consisting of the heat exchange section 31 and the reflux section also includes a liquid storage section, which can store the preheated humidifying water to form a buffer space for the humidifying water in the circulation loop.

[0080] In practical applications, the liquid storage section can be a water tank, with a liquid storage cavity formed inside. The outer wall of the water tank has an inlet, a first outlet, and a second outlet that communicate with the liquid storage cavity. The inlet and the first outlet are connected to the outlet of the heat exchange section 31 and the inlet of the vaporization section 32, respectively. This allows at least a portion of the humidifying water to flow sequentially through the heat exchange section 31, the liquid storage section, and into the vaporization section 32 for heating and vaporization. The second outlet is connected to the inlet of the reflux section, and the outlet of the reflux section is connected to the inlet of the heat exchange section 31. This allows at least a portion of the humidifying water to flow sequentially through the heat exchange section 31, the liquid storage section, and into the reflux section, re-entering the heat exchange section 31 for heat exchange with the auxiliary circulation pipeline 20.

[0081] In practical applications, the humidifying water stored in the liquid storage section can circulate once along the flow path of the liquid storage section, the reflux section, and the heat exchange section 31, and then enter the vaporization section 32 for secondary heating and vaporization. Of course, the humidifying water stored in the liquid storage section can circulate multiple times along the flow path of the liquid storage section, the reflux section, and the heat exchange section 31, and then enter the vaporization section 32 for secondary heating and vaporization. The specific method can be determined according to the actual usage, and no specific limitation is made here.

[0082] In embodiments of the present invention, the liquid storage section further includes a temperature detection mechanism for detecting the temperature of the humidifying water stored in the liquid storage section. This configuration allows for real-time monitoring of the liquid temperature of the humidifying water in the liquid storage section, preventing damage to downstream components due to excessively high humidifying water temperature. Furthermore, by monitoring the liquid temperature of the humidifying water in real time, the return flow section can be controlled to connect when the liquid temperature is low, allowing the humidifying water in the liquid storage section to re-enter the heat exchange section 31 for heat exchange, thereby ensuring the preheating effect of the humidifying water.

[0083] As examples, when the liquid temperature of the humidifying water in the storage compartment is low, the flow rate of the humidifying water in the heat exchange section 31 can be reduced to ensure that the humidifying water in the humidification pipeline 30 is sufficiently heated, thereby increasing the heating rate of the humidifying water. Conversely, when the liquid temperature of the humidifying water is high, the flow rate of the humidifying water in the heat exchange section 31 can be increased to slow down the heating rate of the humidifying water.

[0084] In practical applications, the flow rate of humidifying water in the heat exchange section 31 can be reduced by decreasing the flow rate of the liquid inlet section 33 upstream of the heat exchange section 31; or, the flow rate of humidifying water in the heat exchange section 31 can be reduced by decreasing the flow rate of the return section.

[0085] As examples, when the liquid temperature of the humidifying water in the storage compartment is low, the heating efficiency of the humidifying water can be improved by increasing the refrigerant flow rate of the refrigerant circulation pipe 10; correspondingly, when the liquid temperature of the humidifying water is low, the heating rate of the humidifying water can be slowed down by reducing the refrigerant flow rate of the refrigerant circulation pipe 10.

[0086] As examples, when the liquid temperature of the humidifying water in the storage compartment is low, the temperature of the refrigerant used for heat exchange can be increased by increasing the exhaust temperature of the refrigerant circulation pipe 10, thereby improving the heating efficiency of the humidifying water; correspondingly, when the liquid temperature of the humidifying water is low, the temperature of the refrigerant used for heat exchange can be reduced by decreasing the exhaust temperature of the refrigerant circulation pipe 10, thereby slowing down the heating rate of the humidifying water.

[0087] In an embodiment of the present invention, the liquid storage unit further includes a first water level detection mechanism for detecting the water level of the humidifying water stored in the liquid storage unit. This configuration allows for real-time detection of the water level in the liquid storage unit, thereby preventing insufficient water storage and ensuring that the water supply tank has sufficient humidifying water for the normal operation of the air conditioner's humidification function.

[0088] As some examples, when the water level of the humidifying water in the liquid storage section is low, the flow rate of the humidifying water in the heat exchange section 31 and its upstream liquid inlet section 33 can be increased so that the amount of humidifying water entering the liquid storage section through the liquid inlet can be greater than the amount of humidifying water flowing out from the first liquid outlet and / or the second liquid outlet, so that the water level of the humidifying water in the liquid storage section rises to the target water level or the minimum critical value of the target water level range.

[0089] Please see Figure 1 , Figure 2 In an embodiment of the present invention, a temperature detection module is provided at one end of the vaporization section 32 facing the heat exchange section 31 for detecting the liquid temperature of the humidification water.

[0090] This configuration allows for real-time monitoring of the humidifying water temperature entering the vaporization section 32, preventing damage to components such as the heating module of the vaporization section 32 due to excessively high humidifying water temperature. Furthermore, by monitoring the humidifying water temperature in real-time, the heating efficiency of the humidifying water in the humidification pipeline 30 can be increased when the humidifying water temperature is low, thus achieving a better preheating effect.

[0091] As examples, when the liquid temperature of the humidifying water is low, the flow rate of the humidifying water in the humidifying pipe 30 can be reduced to ensure that the humidifying water in the humidifying pipe 30 is fully heated, thereby increasing the heating rate of the humidifying water. Conversely, when the liquid temperature of the humidifying water is high, the flow rate of the humidifying water can be increased to slow down the heating rate of the humidifying water.

[0092] As examples, when the liquid temperature of the humidifying water is low, the heating efficiency of the humidifying water can be improved by increasing the refrigerant flow rate of the refrigerant circulation pipe 10; correspondingly, when the liquid temperature of the humidifying water is low, the heating rate of the humidifying water can be slowed down by reducing the refrigerant flow rate of the refrigerant circulation pipe 10.

[0093] As examples, when the liquid temperature of the humidifying water is low, the temperature of the refrigerant used for heat exchange can be increased by increasing the exhaust temperature of the refrigerant circulation pipe 10, thereby improving the heating efficiency of the humidifying water; correspondingly, when the liquid temperature of the humidifying water is low, the temperature of the refrigerant used for heat exchange can be reduced by decreasing the exhaust temperature of the refrigerant circulation pipe 10, thereby slowing down the heating rate of the humidifying water.

[0094] The present invention also proposes an air conditioner, which includes a heat exchange system 100. The specific structure of the heat exchange system 100 is as described in the above embodiments. Since the air conditioner adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The heat exchange system 100 includes an indoor heat exchange part and an outdoor heat exchange part, and the vaporization part 32 of the heat exchange system 100 is disposed in the indoor heat exchange part.

[0095] Alternatively, the air conditioner can be a ducted air conditioner, a wall-mounted air conditioner, or a floor-standing air conditioner.

[0096] In an embodiment of the present invention, the indoor heat exchange section includes a housing (not shown) and a fan (not shown). The housing is provided with an air outlet. The fan is located inside the housing and is spaced apart from the air outlet for blowing air toward the air outlet. The vaporization section 32 includes a heating module located inside the housing and is provided with a steam outlet located between the air outlet and the fan for outputting steam to the air delivery path of the fan.

[0097] In this embodiment, the housing is the housing of the indoor unit of the air conditioner, and the fan and heating module are both integrated inside the housing of the indoor unit. With this configuration, the heating module can generate steam after reheating the humidifying water, and the steam can be output through the steam outlet of the heating module in the direction of the fan's airflow path. In this way, the steam can be delivered to the indoor environment where the indoor unit is located by the fan to achieve the function of humidifying the indoor environment.

[0098] Furthermore, compared to the technical solution of placing the heating module of the humidification pipe 30 outside the casing of the air conditioner indoor unit, first transporting steam to the air conditioner indoor unit through the steam delivery pipe, and then sending it into the indoor environment through the air outlet of the indoor unit, the technical solution of the present invention adopts the method of integrating the heating module inside the air conditioner indoor unit, which can effectively shorten the transport path between the steam and the air outlet, thereby helping to reduce the risk of steam condensation during the transport process, thus ensuring the humidification effect of the air conditioner.

[0099] Optionally, the indoor heat exchange section also includes a drip tray, located below the steam outlet of the heating module. This design allows condensate generated at the heating module to accumulate in the drip tray, preventing direct dripping and potential safety hazards.

[0100] In an embodiment of the present invention, at least a portion of the heat exchange section 31 of the heat exchange system 100 and the auxiliary circulation pipeline 20 are disposed in the indoor heat exchange section and connected to each other for heat exchange.

[0101] In one embodiment, the heat exchange section 31 of the heat exchange system 100 includes a heat exchange module, which can be integrated into the housing of the indoor unit of the air conditioner. This arrangement can effectively shorten the transport path between the heat exchange section 31 and the vaporization section 32, allowing the humidifying water to be preheated at the heat exchange section 31 and then quickly transported to the vaporization section 32 for secondary heating and vaporization, thereby reducing heat loss of the humidifying water during transport.

[0102] In another embodiment, the heat exchange module of the heat exchange section 31 can also be disposed outside the housing of the indoor unit of the air conditioner. This arrangement can shorten the transport path between the heat exchange section 31 and the vaporization section 32 to a certain extent, and can avoid the heat exchange section 31 occupying the internal space of the housing.

[0103] As some examples, the heat exchange module of the heat exchange section 31 may be mounted on the outer wall of the housing, and the connecting pipe between the heat exchange section 31 and the vaporization section 32 may be provided through the housing so that the heat exchange module can be installed and fixed by means of the housing of the air conditioning indoor unit.

[0104] Please see Figure 3 Furthermore, this invention also proposes a humidification method for a heat exchange system 100. The specific structure of the heat exchange system 100 is as described in the above embodiments. Since the humidification method of this heat exchange system 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0105] The humidification method of the heat exchange system 100 includes the following steps:

[0106] S10. Control the humidification pipeline 30 to be turned on, and obtain the liquid temperature of the humidification water at the inlet end of the vaporization section 32.

[0107] In one embodiment of the present invention, the working modes of the air conditioner include manual humidification mode, automatic humidification mode, etc., and the heat exchange system 100 can control the humidification pipeline 30 to be opened or closed according to the corresponding working mode.

[0108] In manual humidification mode, the steps for "controlling the humidification pipe 30 to be turned on" include:

[0109] The heat exchange section 31 and vaporization section 32 of the humidification pipeline 30 are connected, and the humidification water flows through the heat exchange section 31 and vaporization section 32 in sequence. The heat exchange section 31 and vaporization section 32 preheat and reheat the humidification water in sequence, so as to realize the heating and vaporization function of the humidification water and improve the ambient humidity of the indoor environment.

[0110] In automatic humidification mode, the steps for "controlling the humidification pipeline 30 to conduct" include:

[0111] The preset humidity range is determined based on the preset humidity, and the ambient humidity of the indoor environment is obtained at preset intervals.

[0112] As some examples, the preset humidity is defined as X, the minimum threshold value of the preset humidity range is X1, and the maximum threshold value of the preset temperature range is X2, satisfying: X1 = X - 5%, X2 = X + 5%.

[0113] When the indoor ambient humidity is less than the minimum threshold of the preset humidity range, the heat exchange section 31 and vaporization section 32 of the humidification pipeline 30 are connected. The humidification water flows through the heat exchange section 31 and vaporization section 32 in sequence, so that the humidification water is preheated and then reheated through the heat exchange section 31 and vaporization section 32. This can realize the heating and vaporization function of the humidification water, which can improve the ambient humidity of the indoor environment.

[0114] When the ambient humidity of the indoor environment is greater than or equal to the minimum critical value of the preset humidity range, the humidification pipe 30 is shut off and the heat exchange system 100 stops outputting moisture to the indoor environment.

[0115] With this setting, the heat exchange system 100 can be controlled to perform corresponding humidity adjustment operations in the automatic humidification mode, so that the indoor humidity can be kept within the preset humidity range, thereby avoiding excessively high or low air humidity, which could cause discomfort to users.

[0116] S20. Control the refrigerant flow rate of the auxiliary circulation pipeline 20 according to the relationship between the liquid temperature and the preset temperature range.

[0117] This configuration allows for control of the refrigerant flow rate in the auxiliary circulation pipe 20 based on the liquid temperature of the humidifying water at the inlet of the vaporization section 32. This reduces the refrigerant flow rate when the humidifying water temperature is too high, slowing down the heating efficiency and preventing damage to components in the humidifying pipe 30 due to excessively high water temperature. Conversely, it increases the refrigerant flow rate when the humidifying water temperature is too low, improving heating efficiency and ensuring proper preheating. This dynamic control of the liquid temperature in the humidifying pipe 30 better guarantees its normal operation and humidification effect.

[0118] In another embodiment of the present invention, the step of "controlling the refrigerant flow rate of the auxiliary circulation pipeline 20 according to the relationship between the liquid temperature and the preset temperature range" includes:

[0119] When the liquid temperature is greater than or equal to the maximum critical value of the preset temperature range, the auxiliary circulation pipe 20 is shut off. With this setting, when the liquid temperature is less than the minimum critical value of the preset temperature range, it indicates that the liquid temperature at the inlet of the humidification water in the vaporization section 32 is too low. At this time, by controlling the auxiliary circulation pipe 20 to remain open, the heat from the high-temperature refrigerant in the auxiliary circulation pipe 20 can be continuously transferred to the humidification water in the humidification pipe 30, ensuring the preheating effect of the humidification water and shortening the vaporization time required for the humidification water at the heating module of the vaporization section 32.

[0120] When the liquid temperature is lower than the maximum critical value of the preset temperature range, the auxiliary circulation pipe 20 is activated. With this setting, if the liquid temperature exceeds the maximum critical value of the preset temperature range, it indicates that the liquid temperature at the inlet of the vaporization section 32 is too high, posing a risk of damage to components such as the heating module in the humidification pipe 30. In this case, the humidification pipe 30 is shut off, and the liquid flow rate in the humidification pipe 30 is zero. This prevents the high-temperature humidification water from flowing into components such as the heating module, thus extending the service life of the humidification pipe 30.

[0121] In another embodiment of the present invention, the preset temperature range includes a first temperature range and a second temperature range, wherein the maximum critical value of the first temperature range is equal to the minimum critical value of the second temperature range; the step of "controlling the auxiliary circulation pipeline 20 to be turned on when the liquid temperature is greater than or equal to the maximum critical value of the preset temperature range" includes:

[0122] When the liquid temperature is lower than the minimum critical value of the first temperature range, the refrigerant flow rate of the auxiliary circulation pipe 20 is controlled to a first flow rate L1. With this setting, when the liquid temperature is lower than the minimum critical value of the first temperature range, it means that the liquid temperature at the inlet of the vaporization section 32 is too low. If this portion of the humidifying water enters the vaporization section 32, the heating module of the vaporization section 32 needs to operate at a higher power to reheat and vaporize the humidifying water to achieve the humidification function of the humidification pipe 30. In this case, controlling the refrigerant flow rate of the auxiliary circulation pipe 20 to a higher value (the first flow rate L1) ensures the heat exchange efficiency between the auxiliary circulation pipe 20 and the humidifying water, thereby improving the preheating effect of the humidifying water and shortening the vaporization time required for the humidifying water at the heating module of the vaporization section 32.

[0123] When the liquid temperature is greater than or equal to the minimum critical value of the first temperature range and less than the maximum critical value of the first temperature range, the refrigerant flow rate of the auxiliary circulation pipe 20 is controlled to be a second flow rate L2, which is less than the first flow rate L1. With this setting, when the liquid temperature is greater than or equal to the minimum critical value of the first temperature range and less than the maximum critical value, it means that the liquid temperature of the humidifying water at the inlet of the vaporization section 32 is already within the set first temperature range and close to the maximum critical value. The vaporization section 32 of the heating pipe can then complete the secondary heating and vaporization of the humidifying water by operating at a lower power setting, achieving energy savings. At this time, controlling the refrigerant flow rate of the auxiliary circulation pipe 20 to be the second flow rate L2, and making the second flow rate L2 less than the first flow rate L1, can to some extent reduce the heating efficiency of the humidifying water, which helps to maintain the liquid temperature of the humidifying water within the preset temperature range.

[0124] When the liquid temperature is greater than or equal to the minimum critical value of the second temperature range and less than the maximum critical value of the second temperature range, the refrigerant flow rate of the auxiliary circulation pipe 20 is controlled to a third flow rate L3, which is less than the second flow rate L2. With this setting, when the first liquid temperature is greater than or equal to the minimum critical value of the second temperature range and less than the maximum critical value, it means that the liquid temperature at the inlet of the humidification water in the return section is already within the set second temperature range and is close to the maximum critical value. If the humidification water is further heated, there is a risk of overheating and damaging the components on the humidification pipe 30. In this case, controlling the refrigerant flow rate of the auxiliary circulation pipe 20 to the second flow rate L3, and making the second flow rate L3 less than the first flow rate L2, can further reduce the heating efficiency of the humidification water and reduce the risk of the humidification water temperature exceeding the maximum critical value of the preset temperature range. Thus, when the auxiliary circulation pipe 20 is open, the refrigerant flow rate of the circulation pipe can be adjusted in stages, thereby improving the control flexibility of the auxiliary circulation pipe 20.

[0125] In one embodiment of the present invention, a minimum critical value of T1 is defined for a preset temperature range, and a maximum critical value of T2 is defined for the preset temperature range. The first temperature range is a low temperature range, and its minimum critical value can be T1, and its maximum critical value can be T3, where T3 satisfies: T3 = T2 - 10℃; the second temperature range is a high temperature range, and its minimum critical value can be T3, and its maximum critical value can be T2.

[0126] As some examples, T1 can specifically be 30°C. By controlling the minimum liquid temperature of the humidification water to be equal to or close to 30°C, the temperature of the humidification water after preheating can be avoided from being too low, which would increase the power requirement of the heating module of the vaporization section 322322.

[0127] As examples, T3 satisfies: 70℃ ≤ T2 ≤ 80℃. By controlling the maximum liquid temperature of the humidifying water between 70℃ and 80℃, it is possible to avoid the risk of damage to the components of the humidifying pipe 302020 due to excessively high preheated humidifying water temperature. Specifically, the maximum critical value T2 within the preset temperature range can be 70℃, 72℃, 74℃, 76℃, 78℃, 80℃, etc.

[0128] Please see Figure 4 In another embodiment of the present invention, the step of "controlling the refrigerant flow rate of the auxiliary circulation pipeline 20 according to the relationship between the liquid temperature and the preset temperature range" includes:

[0129] S30. Based on the relationship between the liquid temperature and the preset temperature range, control the opening degree of the electronic expansion valve of the refrigerant circulation pipeline 10 and / or the liquid flow rate of the humidification pipeline 30.

[0130] In practical applications, when the liquid temperature is greater than or equal to the minimum critical value of the preset temperature range, the opening degree of the electronic expansion valve of the refrigerant circulation pipeline 10 is controlled to the preset opening degree. This setting allows the refrigerant circulation pipeline 10 to have a preset exhaust temperature Tp, at which point the temperature of the refrigerant used for heat exchange with the humidification pipeline 30 in the refrigerant circulation pipeline 10 meets the target requirements.

[0131] As some examples, the refrigerant circulation line 10 has a preset exhaust temperature Tp that satisfies: Tp≤105℃, and the preset exhaust temperature Tp can be 95℃, 97℃, 99℃, 101℃, 103℃, 105℃, etc.

[0132] In practical applications, when the liquid temperature is lower than the minimum critical value of the preset temperature range, the opening of the electronic expansion valve is reduced compared to the preset opening. With this setting, when the liquid temperature is lower than the minimum critical value of the preset temperature range, the exhaust temperature Tp of the refrigerant circulation pipe 10 can be increased by reducing the opening of the electronic valve. At this time, the temperature of the refrigerant used for heat exchange with the humidification pipe 30 in the refrigerant circulation pipe 10 is correspondingly increased, which is beneficial to improving the preheating effect of the refrigerant circulation pipe 10 on the humidification water.

[0133] As some examples, when the electronic expansion valve decreases compared to the preset opening, the maximum increase in the exhaust temperature Tp of the refrigerant circulation line 10 is defined as Tx, and the maximum increase in temperature Tx satisfies: Tp = 10℃.

[0134] In another embodiment, when the liquid temperature of the humidifying water is low, the flow rate of the humidifying water in the humidifying pipe 30 can be reduced to ensure that the humidifying water in the humidifying pipe 30 is fully heated, thereby increasing the heating rate of the humidifying water. Conversely, when the liquid temperature of the humidifying water is high, the flow rate of the humidifying water in the humidifying pipe 30 can be increased to slow down the heating rate of the humidifying water.

[0135] In this embodiment, the heat exchange system 100100 is defined to have a target humidification capacity. In practical applications, when the liquid temperature is greater than or equal to the minimum critical value of a preset temperature range, but less than the maximum critical value of the preset temperature range, the flow rate of the humidification pipeline 30 is controlled to be greater than or equal to half of the target humidification capacity, but less than the target humidification capacity. This setting ensures that the flow rate of the humidification pipeline 30 is not too high, which would affect the heat exchange effect between the humidification water and the auxiliary circulation pipeline 20. Simultaneously, it ensures that the flow rate of the humidification pipeline 30 is not too low, which would result in an insufficient humidification capacity of the heat exchange system 100 and affect the humidification effect.

[0136] In practical applications, when the liquid temperature is greater than or equal to the minimum critical value of the preset temperature range, but less than the maximum critical value of the preset temperature range, the flow rate of the humidification pipeline 30 is controlled to equal the target humidification amount. This setting ensures that the humidification amount of the heat exchange system 100 meets the target requirements while mitigating the heating efficiency of the humidification water and reducing the risk of the humidification water temperature exceeding the maximum critical value of the preset temperature range, thus guaranteeing the humidification effect of the heat exchange system 100.

[0137] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A heat exchange system applied to an air conditioner, characterized in that, include: Refrigerant circulation piping is used for refrigerant circulation. An auxiliary circulation line is provided in parallel with at least a portion of the refrigerant circulation line to divert the refrigerant from the refrigerant circulation line; as well as A humidification pipeline is used for the flow of humidification water. The humidification pipeline includes a heat exchange section and a vaporization section arranged sequentially along the flow direction of the humidification water. The heat exchange section is at least partially heat-connected to the auxiliary circulation pipeline for preheating the humidification water. The vaporization section is used for secondary heating of the humidification water to heat and vaporize the humidification water.

2. The heat exchange system as described in claim 1, characterized in that, The refrigerant circulation pipeline includes a compressor, a four-way valve, an indoor heat exchanger, and an outdoor heat exchanger connected in sequence. The auxiliary circulation pipeline is connected in parallel between the four-way valve and the indoor heat exchanger.

3. The heat exchange system as described in claim 1, characterized in that, The refrigerant circulation pipeline includes a compressor, a four-way valve, an indoor heat exchanger, and an outdoor heat exchanger connected in sequence. The auxiliary circulation pipeline is connected in parallel between the compressor's exhaust port and the indoor heat exchanger.

4. The heat exchange system according to any one of claims 1 to 3, characterized in that, The refrigerant circulation pipeline is equipped with a control valve to control the refrigerant flow rate of the refrigerant circulation pipeline.

5. The heat exchange system as described in any one of claims 1 to 3, characterized in that, The humidification pipeline also includes a return section, which is used to divert the preheated humidification water downstream of the heat exchange section so that at least a portion of the humidification water flows back to the upstream of the heat exchange section.

6. An air conditioner, characterized in that, The heat exchange system as described in any one of claims 1 to 5, the heat exchange system comprising an indoor heat exchange section and an outdoor heat exchange section, wherein the vaporization section of the heat exchange system is disposed in the indoor heat exchange section.

7. The air conditioner as described in claim 6, characterized in that, The indoor heat exchange section includes: Housing, the housing being provided with an air outlet; and A fan is disposed inside the housing and spaced apart from the air outlet, for blowing air toward the air outlet; The vaporization section includes a heating module located inside the housing and has a steam outlet located between the air outlet and the fan, for outputting steam to the air delivery path of the fan.

8. The air conditioner as described in claim 7, characterized in that, The heat exchange section of the heat exchange system and at least a portion of the auxiliary circulation pipeline are disposed in the indoor heat exchange section.

9. A humidification method for a heat exchange system as described in any one of claims 1 to 5, characterized in that, The steps of the humidification method include: Control the humidification pipeline to obtain the liquid temperature of the humidification water at the inlet end of the vaporization section; The refrigerant flow rate of the auxiliary circulation pipeline is controlled according to the relationship between the liquid temperature and the preset temperature range.

10. The humidification method as described in claim 9, characterized in that, The step of "controlling the refrigerant flow rate of the auxiliary circulation pipeline according to the relationship between the liquid temperature and the preset temperature range" includes: When the liquid temperature is greater than or equal to the maximum critical value of the preset temperature range, the auxiliary circulation pipeline is shut off. When the liquid temperature is less than the maximum critical value of the preset temperature range, the auxiliary circulation pipeline is controlled to be turned on.

11. The humidification method as described in claim 10, characterized in that, The preset temperature range includes a first temperature range and a second temperature range, wherein the maximum critical value of the first temperature range is equal to the minimum critical value of the second temperature range. The step of "controlling the auxiliary circulation pipeline to open when the liquid temperature is greater than or equal to the maximum critical value of the preset temperature range" includes: When the liquid temperature is less than the minimum critical value of the first temperature range, the refrigerant flow rate of the auxiliary circulation pipeline is controlled to be the first flow rate L1; When the liquid temperature is greater than or equal to the minimum critical value of the first temperature range and less than the maximum critical value of the first temperature range, the refrigerant flow rate of the auxiliary circulation pipeline is controlled to be the second flow rate L2, where the second flow rate L2 is less than the first flow rate L1. When the liquid temperature is greater than or equal to the minimum critical value of the second temperature range and less than the maximum critical value of the second temperature range, the refrigerant flow rate of the auxiliary circulation pipeline is controlled to be a third flow rate L3, which is less than the second flow rate L2.

12. The humidification method as described in claim 9, characterized in that, The step of "controlling the refrigerant flow rate of the auxiliary circulation pipeline according to the relationship between the liquid temperature and the preset temperature range" includes: Based on the relationship between the liquid temperature and the preset temperature range, control the opening of the electronic expansion valve of the refrigerant circulation pipeline and / or the liquid flow rate of the humidification pipeline.

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