Heat exchange system and control method and controller thereof

Abstract

The present invention discloses a heat exchange system and its control method and controller, wherein the heat exchange system comprises at least two heat exchangers, a first heat source and a second heat source connected to the heat exchangers through a pipeline, and a flow control device arranged in the pipeline for controlling the flow of the at least two heat exchangers, wherein the control method comprises: obtaining the pressure of the heat exchange system and / or the flow of the heat exchange system; when the obtained pressure of the heat exchange system is equal to or greater than the preset pressure of the first heat source, and / or when the obtained flow of the heat exchange system is equal to or less than the preset flow of the second heat source, increasing the opening of the opened flow control device and / or adjusting the opening quantity of the flow control device. The heat exchange system and its control method and controller provided by the present invention can improve the stability and reliability of the operation of the heat exchange system during operation.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange systems, and in particular to a heat exchange system and a control method and a controller thereof. Background Art

[0002] At present, in order to meet the cooling and heating needs of users, air conditioning equipment with cooling and heating functions is commonly used in the market, such as central air conditioners, heat pumps, etc. The air conditioning equipment is greatly affected by the outdoor environment, such as temperature, humidity, etc. during operation. For example, when the outdoor temperature is below zero, the outdoor unit is prone to frost, which not only causes the defrosting energy consumption of the equipment to be very high, but also the heating effect is poor, and the heating temperature expected by the user cannot be achieved.

[0003] In order to overcome the above problems, a combined heating solution is provided in the prior art, that is, a hot water heating device (such as a wall-mounted boiler) is connected to the existing air-conditioning equipment, and the air-conditioning equipment and the hot water heating device are combined for heating. Especially when the outdoor temperature is low, the humidity is high, and frost is easy to form, the hot water heating device is used as the main heating device to achieve a satisfactory heating effect for users.

[0004] However, the inventors found that when air-conditioning equipment and hot water heating equipment are used for combined heating, a series of problems will arise due to the different operating parameters of the two, which will eventually lead to unstable operation of the entire heat exchange system, frequent alarms, and poor user experience. Summary of the invention

[0005] In order to overcome at least one defect in the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a heat exchange system and its control method and controller, which can take into account devices with different operating parameter requirements, improve the stability and reliability of the heat exchange system during operation, thereby improving the user experience.

[0006] The specific technical solutions of the embodiments of the present invention include:

[0007] A control method for a heat exchange system, the heat exchange system comprising at least two heat exchangers, a first heat source and a second heat source connected to the heat exchangers through a pipeline, and a flow control device arranged in the pipeline for controlling the flow of the at least two heat exchangers, the control method comprising:

[0008] Obtaining the pressure of the heat exchange system and / or the flow rate of the heat exchange system;

[0009] When the obtained pressure of the heat exchange system is equal to or greater than the preset pressure of the first heat source, and / or when the obtained flow rate of the heat exchange system is equal to or less than the preset flow rate of the second heat source, increase the opening degree of the opened flow control device and / or adjust the opening quantity of the flow control device.

[0010] Furthermore, the step of adjusting the opening quantity of the flow control device includes at least any one of the following:

[0011] Open the flow control devices sequentially according to a predetermined sequence;

[0012] Open a flow control device randomly;

[0013] Open the flow control devices one by one in a quantity-adding manner;

[0014] Open the selected number of flow control devices.

[0015] Furthermore, the step of opening a selected number of flow control devices includes: opening some or all of the unopened flow control devices.

[0016] Furthermore, in the process of adjusting the opening quantity of the flow control device, the control method further includes:

[0017] monitoring pressure fluctuations of the heat exchange system and identifying pressure fluctuations corresponding to opening each flow control device;

[0018] After identifying the pressure fluctuation corresponding to each flow control device, the water resistance of each heat exchanger is sorted according to the different effects of the flow control device on the pressure fluctuation; wherein the step of opening the flow control devices in sequence according to the predetermined order is specifically to open the flow control devices based on the sorting results of the water resistance of the heat exchanger.

[0019] Furthermore, the control method also includes executing the following steps in a predetermined cycle: after identifying the pressure fluctuation corresponding to each flow control device, the water resistance of each heat exchanger is sorted according to the different effects of the flow control device on the pressure fluctuation.

[0020] Furthermore, the heat exchanger includes heat exchangers with different radiation heat exchange efficiencies, and when performing the step of adjusting the opening number of the flow control device, the heat exchangers are opened in order from low to high radiation heat exchange efficiency.

[0021] Furthermore, the heat exchanger includes a fan disc, and when the flow control device of the fan disc is turned on, the motor of the fan disc is not started.

[0022] Furthermore, after the opening degree of the opened flow control device reaches the maximum and / or the number of opened flow control devices reaches the maximum, if the currently obtained pressure of the heat exchange system is still equal to or greater than the preset pressure of the first heat source, the control method also includes: lowering the operating temperature of the heat exchange system.

[0023] Furthermore, the step of lowering the operating temperature of the heat exchange system specifically includes: lowering the operating temperature of the first heat source.

[0024] Furthermore, after lowering the operating temperature of the first heat source to a preset temperature, if the currently acquired pressure of the heat exchange system is still equal to or greater than the preset pressure of the first heat source, the control method further includes: shutting down the first heat source.

[0025] Furthermore, the heat exchange system is provided with a circulation pump. When the pressure of the heat exchange system is greater than or equal to the preset pressure of the first heat source and the flow rate of the heat exchange system is greater than the preset flow rate, or only when the pressure of the heat exchange system is greater than the preset pressure of the first heat source, the control method also includes: before adjusting the opening number of the flow control device, or after adjusting the opening number of the flow control device, or during the process of adjusting the opening number of the flow control device, reducing the head of the circulation pump.

[0026] Furthermore, the second heat source includes a compressor. When the flow rate of the heat exchange system is less than the preset flow rate of the second heat source, the control method also includes: reducing the operating frequency of the compressor before adjusting the opening number of the flow control device, or after adjusting the opening number of the flow control device, or when adjusting the opening number of the flow control device.

[0027] Furthermore, the step of obtaining the pressure of the heat exchange system is specifically to obtain the pressure of the pipeline and / or to obtain the internal pipeline pressure of the first heat source; the step of obtaining the flow of the heat exchange system is specifically to obtain the flow of the pipeline and / or to obtain the flow of the fluid flowing through the second heat source.

[0028] Furthermore, after the opening degree of the opened flow control device reaches the maximum and / or the number of opened flow control devices reaches the maximum, if the currently obtained pressure of the heat exchange system is still equal to or greater than the preset pressure of the first heat source, and the first heat source is in a state of supplying domestic hot water to the outside, the control method also includes: closing the second heat source.

[0029] A controller configured to execute any of the control methods described above, the controller at least comprising an acquisition module for acquiring the pressure of a heat exchange system and / or the flow of the heat exchange system; a control module for increasing the opening degree of the opened flow control device and / or adjusting the opening quantity of the flow control device when the acquired pressure of the heat exchange system is equal to or greater than the preset pressure of the first heat source and / or when the acquired flow of the heat exchange system is equal to or less than the preset flow of the second heat source.

[0030] A heat exchange system comprises the above-mentioned controller, at least two heat exchangers capable of communicating with the controller, a first heat source and a second heat source connected to the heat exchangers through pipelines, and a flow control device arranged in the pipeline for independently controlling the flow of the at least two heat exchangers.

[0031] Furthermore, the second heat source is connected to the heat exchanger through a water outlet pipe and a water return pipe to form a circulating water circuit, and the water outlet and water return ends of the first heat source are connected in series in the circulating water circuit.

[0032] Furthermore, the water outlet and water return ends of the first heat source are arranged in the water outlet pipe or the water return pipe, and the heat exchange system is provided with a pressure sensor, and the pressure sensor is arranged in the pipe between the water outlet and the first heat source or in the pipe between the water return end and the first heat source or in the internal pipe of the first heat source.

[0033] Furthermore, the heat exchange system is provided with a flow sensor, and the flow sensor is arranged in the water outlet pipeline or the water return pipeline or in an internal pipeline of the second heat source.

[0034] Furthermore, the first heat source includes a gas water heater, the second heat source includes a heat pump or an air conditioner, and the heat exchanger includes at least one of a fan, a floor heater, and a heat sink, or a combination thereof.

[0035] A control method for a heat exchange system, the heat exchange system comprising: a heat exchanger, a first heat source and a second heat source connected to the heat exchanger through a pipeline, and a bypass pipeline connected in parallel with the heat exchanger; the control method comprises: obtaining the pressure of the heat exchange system and / or the flow of the heat exchange system; when the obtained pressure of the heat exchange system is equal to or greater than the preset pressure of the first heat source, and / or when the obtained flow of the heat exchange system is equal to or less than the preset flow of the second heat source, increasing the flow of the bypass pipeline.

[0036] Furthermore, the step of increasing the flow rate of the bypass pipeline includes: increasing the flow rate of the opened bypass pipeline and / or increasing the number of opened bypass pipelines.

[0037] The technical solution of the present invention has the following significant beneficial effects:

[0038] The control method of the heat exchange system provided in the present application is aimed at a heat exchange system with two different types of heat sources. By obtaining the pressure of the heat exchange system and / or the flow of the heat exchange system and monitoring the pressure and flow in the heat exchange system, when the obtained pressure of the heat exchange system is equal to or greater than the preset pressure of the first heat source, and / or when the obtained flow of the heat exchange system is equal to or less than the preset flow of the second heat source, the pressure and flow are adjusted by increasing the opening degree of the opened flow control device and / or adjusting the number of openings of the flow control device, so that the pressure and flow can meet the requirements of the preset values, and the problem of increased water pressure in the heat exchange system is solved, and protection is provided in advance to avoid the system being locked and unable to operate normally due to frequent pressure relief and high-pressure alarms; it can also solve the alarm caused by low flow of the heat exchange system. On the whole, it can take into account equipment with different operating parameter requirements, improve the stability and reliability of the heat exchange system operation during operation, thereby improving the user experience.

[0039] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present invention include many changes, modifications and equivalents. Features described and / or shown for one embodiment can be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or replace features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the figures are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to the teachings of the present invention.

[0041] Figure 1 A flow chart of the steps of a control method for a heat exchange system provided in one embodiment of the present application;

[0042] Figure 2 A schematic diagram of the structure of a heat exchange system provided in one embodiment of the present application;

[0043] Figure 3 A flow chart of steps of a method for controlling a heat exchange system provided in yet another embodiment of the present application;

[0044] Figure 4 A schematic structural diagram of a heat exchange system provided in another embodiment of the present application;

[0045] Figure 5 This is a schematic structural diagram of a heat exchange system provided in yet another embodiment of the present application.

[0046] Reference numerals in the above drawings:

[0047] 1. a first heat source; 11. a first circulation pump;

[0048] 2. Second heat source; 21. Compressor; 22. Second circulation pump;

[0049] 31. Fan coil; 32. Floor heating; 33. Radiator;

[0050] 4. Flow control device;

[0051] 51. Water outlet pipe; 52. Water return pipe;

[0052] 6. Bypass pipeline. DETAILED DESCRIPTION

[0053] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0054] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0056] The embodiments of the present application specification provide a heat exchange system and a control method and a controller thereof.

[0057] like Figure 2As shown, the heat exchange system may include at least: at least two heat exchangers, a first heat source 1 and a second heat source 2 connected to the heat exchangers through pipelines, and a flow control device 4 arranged in the pipeline for controlling the flow of the at least two heat exchangers.

[0058] Wherein, the heat exchanger includes at least one of an air disk 31, a floor heating 32, and a heat sink 33, or a combination thereof. The operating parameters of the first heat source 1 are different from the operating parameters of the second heat source 2. Specifically, the difference in operating parameters between the first heat source 1 and the second heat source 2 may vary according to the specific types of the first heat source 1 and the second heat source 2. For example, the first heat source 1 may include a gas water heater, and the second heat source 2 may include a heat pump or an air conditioner. In the implementation manner of this specification, the first heat source 1 is a wall-mounted boiler, and the second heat source 2 is a heat pump. For example, the first heat source 1 is a wall-mounted boiler, and the second heat source 2 is a heat pump. For example, the first heat source 1 is a wall-mounted boiler, and the second heat source 2 is a heat pump. For other different forms of heat sources, they can be adaptively adjusted with reference to the above forms of the heat sources, and this application will not be expanded one by one here. When the heat pump and the wall-mounted boiler simultaneously supply heat to the heat exchanger through pipelines (hereinafter referred to as dual-energy operation), there are at least the following problems:

[0059] First, the maximum operating water pressure range of the heat pump and the wall-mounted boiler is inconsistent: Generally, the maximum operating water pressure of the wall-mounted boiler is lower than the maximum operating water pressure of the heat pump. Secondly, the operating flow range of the heat pump and the wall-mounted boiler is inconsistent: the heat pump is a "large flow and small temperature difference" heat exchange equipment. In order to ensure that the heat pump can normally complete the heat exchange function, the flow of the heat pump cannot be lower than the designed minimum operating flow, while the wall-mounted boiler is not subject to the minimum flow limit.

[0060] However, the inventors have discovered that when dual-energy operation is performed, the heat exchange system cannot operate normally if any one of the following situations or a combination thereof occurs: for example, when the initial water supply pressure of the circulation system is too high, the circulation pump is over-equipped, the expansion tank fails, etc., the above situations may cause the water pressure of the wall-mounted boiler to exceed a certain value. In the worst case, it may cause the wall-mounted boiler to frequently release pressure, or the wall-mounted boiler may issue multiple high-pressure alarms, which may eventually cause the heat exchange system to be locked and unable to operate normally.

[0061] In addition, when the heat pump system is in long-term operation, the heat exchange system may experience flow attenuation due to some reasons. The main reasons for flow attenuation may include: foreign matter in the circulation pipeline of the heat exchange system causing semi-blockage, welding nodules at the pipeline connection, and failure of the differential pressure valve. After flow attenuation occurs, the heat pump flow may be lower than the minimum operating flow. At this time, the heat pump will alarm multiple times due to the low flow, which will eventually cause the system to lock and fail to operate normally.

[0062] In order to take into account devices with different operating parameter requirements during dual-energy operation, thereby improving the stability and reliability of the heat exchange system during operation and improving the user experience, a control method for a heat exchange system is provided in this specification.

[0063] See also Figure 1 , the control method of the heat exchange system may include the following steps:

[0064] Step S10: obtaining the pressure of the heat exchange system and / or the flow rate of the heat exchange system;

[0065] Step S12: When the obtained pressure of the heat exchange system is equal to or greater than the preset pressure of the first heat source 1, and / or when the obtained flow rate of the heat exchange system is equal to or less than the preset flow rate of the second heat source 2, increase the opening degree of the opened flow control device 4 and / or adjust the opening quantity of the flow control device 4.

[0066] In this specification, the pressure of the heat exchange system may be obtained alone, the flow rate of the heat exchange system may be obtained alone, or the pressure and flow rate of the heat exchange system may be obtained simultaneously.

[0067] Specifically, it can be adaptively matched according to the actual heat source type and different requirements of operating parameters. For example: for some embodiments, when the first heat source 1 is a wall-mounted boiler and the second heat source 2 is a heat pump, in the initial operation of the heat exchange system, the flow rate of the heat exchange system is relatively large, and the probability of too small flow rate is small, and only the pressure of the heat exchange system can be obtained. For example, in other embodiments, when it can be guaranteed that the operating pressure of the second heat source 2 will not be too high, only the flow rate of the heat exchange system can be obtained. Of course, when the pressure and flow information of the heat exchange system are obtained at the same time, the stability and reliability of the operation of the heat exchange system can be more reliably guaranteed.

[0068] After obtaining at least one of the pressure of the heat exchange system and the flow rate of the heat exchange system, the obtained pressure and flow rate information are compared with the preset values. When at least one of the obtained pressure of the heat exchange system is equal to or greater than the preset pressure of the first heat source 1 and the obtained flow rate of the heat exchange system is equal to or less than the preset flow rate of the second heat source 2 is established, the heat exchange system may alarm, and at this time, the pressure and flow rate of the heat exchange system can be controlled by increasing the opening degree of the opened flow control device 4, adjusting the opening number of the flow control device 4, etc., so that the pressure and flow rate of the heat exchange system meet the preset value requirements.

[0069] In this specification, it should be noted that the step of obtaining the pressure of the heat exchange system may specifically be obtaining the pressure of the pipeline and / or obtaining the internal pipeline pressure of the first heat source 1 .

[0070] Among them, the first heat source 1 can be a heat source whose operating pressure cannot be higher than the preset pressure. Specifically, it can be a gas heat exchange device, such as a wall-mounted boiler, a gas water heater, etc. Of course, the first heat source 1 can also be other types of heat sources whose operating pressure cannot be too large. In the implementation of the present specification, the first heat source 1 is taken as an example of a wall-mounted boiler in a gas heat exchange device. When the first heat source 1 is a wall-mounted boiler, the preset pressure of the wall-mounted boiler can be 3BAR. Of course, the preset pressure is mainly a parameter value designed for a home environment. If the wall-mounted boiler is used in other scenarios, for example, a commercial environment with a large water demand, the preset pressure can be adaptively adjusted, and the specific application is not the only limitation here.

[0071] In this specification, it should be noted that the step of obtaining the flow rate of the heat exchange system may specifically be obtaining the flow rate of the pipeline and / or obtaining the flow rate of the fluid flowing through the second heat source 2 .

[0072] The second heat source 2 can be a heat source whose operating flow cannot be lower than the preset flow, specifically, it can be in the form of a heat pump, air conditioner, etc. Of course, the second heat source 2 can also be other types of heat sources whose operating flow cannot be too low. In the embodiments of the present specification, the second heat source 2 is a heat pump as an example for illustration. When the second heat source 2 is a heat pump, the preset flow (i.e., the minimum operating flow) of the heat pump can be 1.1M3 / H. Of course, the preset flow is also mainly a parameter value designed for a home environment. If the heat pump is used in other scenarios, such as a commercial environment with a large water demand, the preset flow can be adaptively adjusted, and the specific present application is not the only limitation here.

[0073] When any one of the pressure and flow of the heat exchange system exceeds the standard, that is, when the obtained pressure of the heat exchange system is equal to or greater than the preset pressure of the first heat source 1, and / or when the obtained flow of the heat exchange system is equal to or less than the preset flow of the second heat source 2, it can be regulated by increasing the opening degree of the opened flow control device 4 and / or adjusting the opening number of the flow control device 4 to reduce the pressure of the heat exchange system and increase the flow of the heat exchange system.

[0074] In this specification, for each heat exchanger, it is matched with a flow control device 4 that can control the flow of the device. Specifically, the flow control device 4 can be in the form of a valve that controls the on-off of the branch where the heat exchanger is located, or the flow control device 4 can be in the form of a valve that can adjust the opening to adjust the flow of the branch where the heat exchanger is located. When the heat exchanger is in the form of a valve whose flow cannot be adjusted, the pressure and flow of the heat exchange system can be adjusted by adjusting the number of openings of the flow control device 4. When the heat exchanger is in the form of a valve whose flow can be adjusted, the pressure and flow of the heat exchange system can be adjusted by increasing the opening of the opened flow control device 4. Of course, the pressure and flow of the heat exchange system can also be adjusted by adjusting the number of openings of the flow control device 4.

[0075] The following is a detailed description of the step of adjusting the number of flow control devices 4 to be opened. The step of adjusting the number of flow control devices 4 to be opened may include at least any one of the following: opening the flow control devices in sequence according to a predetermined order; opening a flow control device at random; opening the flow control devices one by one in a superimposed manner; or opening a selected number of flow control devices.

[0076] For the first adjustment method: when it is necessary to adjust the number of flow control devices 4 to be opened, they can be opened in sequence according to a predetermined order. Specifically, before opening in sequence, the flow control devices can be numbered and stored, and the opening in sequence according to the predetermined order can be opening in the order of the numbers. For example, the heat exchange system includes three flow control devices, and the corresponding storage numbers are No. 1, No. 2 and No. 3, respectively. When opening in sequence according to the predetermined order, the corresponding flow control devices can be opened in the order of the numbers, first opening No. 1; closing No. 1, then opening No. 2; finally closing No. 2, and then opening No. 3. In addition, the performance parameters (such as the size of water resistance) of the flow control device 4 can also be sorted and stored, and opening in sequence according to the predetermined order can be opening in the order of the size of the parameters. Among them, the sorting of the performance parameters of the flow control device 4 can be stored in the memory of the heat exchange system before the first use of the heat exchange system, or can be obtained through self-learning during use. When opening in sequence according to the order of water resistance, it is useful to improve the accuracy and efficiency of the adjustment.

[0077] For the second adjustment method: when the number of flow control devices 4 to be opened needs to be adjusted, a flow control device can be opened randomly. When a flow control device is opened randomly, there is no need to consider complex control logic, and only the changes in system pressure and / or flow need to be monitored in real time. When the system pressure and flow meet the preset value requirements, the adjustment can be stopped.

[0078] Regarding the third adjustment method: when it is necessary to adjust the number of flow control devices 4 that are opened, the flow control devices can be opened one by one in a superimposed manner. Specifically, for the unopened flow control devices, one flow control device can be opened first; if the pressure and flow rate do not meet the preset value requirements at this time, then another flow control device can be opened (i.e., two unopened flow control devices can be opened); if the pressure and flow rate do not meet the preset value requirements at this time, then another flow control device can be opened (i.e., three unopened flow control devices can be opened)... and so on until the preset value requirements of pressure and flow are met.

[0079] For the fourth adjustment method: when the number of flow control devices 4 to be opened needs to be adjusted, a selected number of flow control devices may be opened. Specifically, the step of opening a selected number of flow control devices may include: opening some or all of the unopened flow control devices.

[0080] In this embodiment, opening a selected number of flow control devices 4 may specifically be opening some of the unopened flow control devices or opening all the unopened flow control devices. For example, when the unopened flow control devices include: a first control valve, a second control valve and a third control valve, one of them may be opened, or a combination of two of them may be opened, or all of them may be opened. Among them, opening all the unopened flow control devices directly achieves the purpose of reducing pressure / increasing flow in the most reliable and direct way. However, in some cases, in order to avoid the temperature drop that may be caused by opening all of them, or in other cases, when the pressure excess value or the flow shortage value is not very large and all of them do not need to be opened, partially opening them will better achieve the effect of matching the current working condition of the heat exchange system. Furthermore, in the process of adjusting the number of openings of the flow control device 4, the control method may also include:

[0081] Step S13: monitoring the pressure fluctuation of the heat exchange system, and identifying the pressure fluctuation corresponding to opening each flow control device;

[0082] Step S15: after identifying the pressure fluctuation corresponding to each flow control device, sort the water resistance of each heat exchanger according to the difference in the influence of the flow control device on the pressure fluctuation. The step of opening the flow control devices in sequence according to the predetermined order is specifically to open the flow control devices based on the sorting result of the water resistance of the heat exchanger.

[0083] In this embodiment, in the process of adjusting the opening number of the flow control device 4, the pressure fluctuation amount caused by each flow control device to the heat exchange system can be obtained. The pressure fluctuation amount caused by the flow control device 4 to the heat exchange system is proportional to the water resistance of the heat exchanger. Therefore, based on the pressure fluctuation amount caused by each flow control device to the heat exchange system, the water resistance of the heat exchanger can be sorted, and the sorting result can be stored in the memory of the heat exchange system later.

[0084] When the heat exchange system stores the ranking of the water resistance of the heat exchanger, for the first adjustment method, the flow control device can be opened based on the ranking structure of the water resistance of the heat exchanger. For example, starting from the heat exchanger with the smallest water resistance (i.e., the most obvious pressure reduction and flow increase effect), each flow control device can be opened in sequence in the order of increasing water resistance, so as to efficiently screen out the combination of flow heat exchangers that need to be opened.

[0085] As the heat exchange system operates, the water resistance of the heat exchanger may change to varying degrees, and the water resistance ranking of the corresponding heat exchanger may also change. In order to monitor the change of water resistance during the use of the heat exchanger, the control method may also include performing the following steps in a predetermined cycle: after identifying the pressure fluctuation corresponding to each flow control device, the water resistance of each heat exchanger is ranked according to the difference in the impact of the flow control device on the pressure fluctuation. Among them, the predetermined cycle can be set accordingly according to the actual product type and the environment in which the product is used, and this application does not make specific limitations here.

[0086] In one embodiment, the heat exchanger may include a fan disk 31, and when the flow control device 4 of the fan disk 31 is turned on, the motor of the fan disk 31 is not started.

[0087] When the heat exchanger is in the form of a fan disk 31, and the fan disk 31 is opened when the flow control device 4 is turned on, the motor is not started. Since the heat exchange component inside the fan disk 31 is small in size, when the motor of the fan disk 31 is not started, the fan disk 31 does not produce air, and only a small amount of heat exchange occurs between the heat exchange component and the air. At this time, the radiation heat exchange efficiency is very low, and will not cause a large abnormal temperature fluctuation in the room where the fan disk 31 is located, which is conducive to ensuring a better user experience.

[0088] In one embodiment, the heat exchanger may include heat exchangers with different radiation heat exchange efficiencies, and when performing the step of adjusting the opening number of the flow control device 4, the heat exchangers are opened in order from low to high radiation heat exchange efficiencies.

[0089] Specifically, the heat exchanger may include: a fan disk 31, a floor heater 32, and a heat sink 33. Of course, the heat exchanger may also be in other forms. Different heat exchangers have different radiation heat exchange efficiencies due to their different structures, heat exchange dimensions, etc. For the fan disk 31, it has a smaller wind radiation heat exchange area before the fan is started, and the radiation heat exchange efficiency is the lowest. The flow control device 4 corresponding to the fan disk 31 can be adjusted first. For the floor heater 32 or the heat sink 33, it has a larger radiation heat exchange area and a higher radiation heat exchange efficiency. After the flow control device 4 corresponding to the fan heat exchanger is adjusted, it can be determined whether the flow control device 4 corresponding to the floor heater 32 or the heat sink 33 needs to be further adjusted. Specifically, the radiation heat exchange efficiency of the floor heater 32 and the heat sink 33 can be ranked according to the difference in their total heat exchange area. For example, when the total heat exchange area of ​​the floor heater 32 is larger than that of the heat sink 33, the flow control device 4 corresponding to the floor heater 32 can be turned on last. By opening the flow control devices 4 corresponding to the heat exchangers in the order of low to high radiation heat exchange efficiency, the occurrence of abnormal temperature fluctuations can also be reduced as much as possible.

[0090] For a heat exchange system with two different types of heat sources, by obtaining the pressure of the heat exchange system and / or the flow of the heat exchange system and monitoring the pressure and flow in the heat exchange system, when the obtained pressure of the heat exchange system is equal to or greater than the preset pressure of the first heat source 1, and / or when the obtained flow of the heat exchange system is equal to or less than the preset flow of the second heat source 2, the pressure and flow are adjusted by increasing the opening degree of the opened flow control device 4 and / or adjusting the opening number of the flow control device 4, so that the pressure and flow can meet the requirements of the preset values, and the problem of increased water pressure in the heat exchange system can be solved, and protection can be provided in advance to avoid frequent pressure relief and high-pressure alarms that cause the system to be locked and cannot operate normally; it can also solve the alarm caused by low flow of the heat exchange system. On the whole, it can take into account equipment with different operating parameter requirements, improve the stability and reliability of the heat exchange system operation during operation, thereby improving the user experience.

[0091] Furthermore, the control method may also include step S14: after the opening degree of the opened flow control device 4 reaches the maximum and / or the opening number of the flow control device 4 reaches the maximum, if the currently obtained pressure of the heat exchange system is still equal to or greater than the preset pressure of the first heat source 1, the operating temperature of the heat exchange system is reduced.

[0092] In this embodiment, when the opening degree of the opened flow control device 4 reaches the maximum and / or the number of opened flow control devices 4 reaches the maximum, the pressure of the heat exchange system can no longer be affected by adjusting the flow control device 4. At this time, the operating temperature of the heat exchange system can be lowered.

[0093] The step of reducing the operating temperature of the heat exchange system may specifically include: reducing the operating temperature of the first heat source 1. The operating temperature of the first heat source 1 may specifically be its actual working temperature (e.g., water outlet temperature), a target temperature set by a user, etc. When the operating temperature of the first heat source 1 is reduced, the pressure inside the first heat source 1 can be reduced, and the internal pressure of the first heat source 1 may be reduced to below a preset pressure, thereby meeting the requirement for stable operation of the heat exchange system.

[0094] Specifically, taking the operating temperature of the first heat source 1 as the target temperature set by the user as an example, when lowering the operating temperature of the first heat source 1, it can start from the original target temperature set by the user (for example, 65 degrees Celsius) and start to decrease step by step with a predetermined temperature gradient (for example, 5 degrees). During the lowering process, determine whether the current pressure has dropped below the preset pressure. If so, stop cooling and operate at the current target temperature.

[0095] Furthermore, after lowering the operating temperature of the first heat source 1 to a preset temperature, if the currently acquired pressure of the heat exchange system is still equal to or greater than the preset pressure of the first heat source 1 , the control method further includes step S16: shutting down the first heat source 1 .

[0096] The preset temperature may be the lowest operating temperature of the first heat source 1. When the first heat source 1 is a wall-mounted boiler, the lowest operating temperature may be a temperature value between 35 degrees Celsius and 40 degrees Celsius.

[0097] In some embodiments, the heat exchange system is provided with a circulation pump. Only when the pressure of the heat exchange system is greater than the preset pressure of the first heat source, or when the pressure of the heat exchange system is greater than the preset pressure of the first heat source 1 and the flow rate of the heat exchange system is greater than the preset flow rate, the control method may also include: before adjusting the opening number of the flow control device 4, or after adjusting the opening number of the flow control device 4, or during the process of adjusting the opening number of the flow control device 4, reducing the head of the circulation pump.

[0098] In this embodiment, the heat exchange system may be provided with a circulation pump for providing fluid flow power. Specifically, a first circulation pump 11 may be provided in the first heat source 1 or at the water outlet of the first heat source 1, and a second circulation pump 22 may be provided in the second heat source 2 or at the water inlet of the second heat source 2.

[0099] When the pressure of the heat exchange system is greater than the preset pressure of the first heat source 1, the circulation pressure of the system can be reduced by adjusting the control of the circulation pump in the system to maintain the flow rate unchanged and reduce the head of the circulation pump.

[0100] Specifically, for a circulating pump, different heads can be matched at the same flow rate. When the flow rate is kept unchanged and the head of the circulating pump is reduced, generally, head = vertical height + pipeline loss + outlet pressure. If the vertical height and pipeline loss remain unchanged, the outlet pressure will inevitably decrease, that is, the pressure of the heat exchange system can be reduced.

[0101] In addition, during the process of adjusting the circulating pump head, in order to avoid reducing the head indefinitely and reducing the flow rate, other alarms appear. When there is still room for adjustment in the flow of the heat exchange system, the pressure of the heat exchange system can be reduced by reducing the circulating pump head and reducing the flow of the heat exchange system to a certain extent.

[0102] Specifically, when the pressure of the heat exchange system is greater than or equal to the preset pressure of the first heat source, and the flow rate of the heat exchange system is greater than the preset flow rate, the above-mentioned step of reducing the head of the circulation pump can also be performed.

[0103] The preset flow rate can be: a flow rate that ensures that the heat exchange system does not cause an alarm due to other factors (e.g., too low flow rate) during the head reduction process. The specific form of the preset flow rate can be a set flow value, a flow difference, or a percentage interval of flow reduction. In addition, the specific value of the preset flow rate can vary depending on the circulating pump and the heat exchange system in which the circulating pump is located, and the present application does not limit the specific value here.

[0104] During the adjustment process, the lifts of the first circulation pump 11 and the second circulation pump 22 can be reduced at the same time, or the lift of one of the circulation pumps can be reduced first, and the pressure change of the heat exchange system can be judged. If the pressure has been reduced to a preset value, there is no need to adjust the lift of the other circulation pump. For example, the lift of the second circulation pump 22 can be reduced first, and then the pressure change of the heat exchange system can be judged. If the pressure has been reduced to a preset value at this time, the lift of the first circulation pump 11 is no longer adjusted; if the pressure has not been reduced to the preset value at this time, the lift of the first circulation pump 11 can be further adjusted.

[0105] In some embodiments, the second heat source 2 includes a compressor 21. When the flow rate of the heat exchange system is less than the preset flow rate of the second heat source 2, the control method may further include: reducing the operating frequency of the compressor 21 before adjusting the opening number of the flow control device 4, or after adjusting the opening number of the flow control device 4, or when adjusting the opening number of the flow control device 4.

[0106] In this embodiment, the second heat source 2 (such as a heat pump) includes a compressor 21, which is specifically a variable frequency compressor 21 whose operating frequency can be adjusted. When the flow rate of the heat exchange system is less than the preset flow rate of the second heat source 2, in order to ensure that the heat pump can operate normally, the boundary conditions of the heat pump regarding the flow rate can be broadened by adjusting the frequency of the compressor 21. For example, when the frequency of the compressor 21 is not adjusted, the heat pump requires the flow rate to be no less than the preset flow rate. When the frequency of the compressor 21 is reduced, the speed of the compressor 21 can be reduced to reduce the flow rate of the refrigerant. Since the heat exchange amount on the refrigerant side of the heat pump is reduced as a whole, according to the principle of conservation of energy, the flow rate on the heated water side can also be reduced, that is, the flow rate of water in the heat pump can be reduced. In one embodiment, after the opening degree of the opened flow control device 4 reaches the maximum and / or the number of openings of the flow control device reaches the maximum, if the pressure of the heat exchange system currently obtained is still equal to or greater than the preset pressure of the first heat source 1, and the first heat source 1 is in a state of supplying domestic hot water to the outside, the control method also includes: closing the second heat source 2.

[0107] In this embodiment, after the opening degree of the opened flow control device 4 reaches the maximum and / or the number of opened flow control devices reaches the maximum, if the currently obtained pressure of the heat exchange system is still equal to or greater than the preset pressure of the first heat source 1, that is, the pressure cannot be adjusted by simply adjusting the flow control device, the first heat source 1 is in a state of supplying domestic hot water to the outside. At this time, in order to ensure that users can obtain domestic hot water normally, the operating temperature of the first heat source 1 will not be lowered, but the pressure can be reduced by closing the second heat source 2.

[0108] Please refer to Figure 4 and Figure 5 In this specification, a control method for a heat exchange system is also provided. The heat exchange system includes: a heat exchanger, a first heat source 1 and a second heat source 2 connected to the heat exchanger through pipelines, and a bypass pipeline 6 connected in parallel with the heat exchanger.

[0109] In some other embodiments provided in this specification, the heat exchanger may be provided with a bypass line 6 in parallel, and the flow rate of the bypass line 6 may be controlled to relieve pressure and increase flow. Specifically, the number of the bypass lines 6 may be one or more, and this application does not make any specific limitation here. Figure 4 As shown, the bypass line 6 may be provided as a bypass branch independent of the heat exchanger, and a flow control device 4 may be provided on the bypass branch; in addition, as shown Figure 5 As shown, a multi-way valve structure may also be provided in the pipeline where the heat exchanger is located, and a bypass branch is connected through the multi-way valve, one end of the bypass branch is connected to the multi-way valve, and the other end is connected to the water outlet pipeline 51. The multi-way valve may be a three-way valve structure, or a four-way valve or a valve structure with more ports. The structure of the multi-way valve may be different depending on the number of bypass branches, and the present application does not make specific limitations here.

[0110] See also Figure 3 The control method of the heat exchange system provided with the bypass pipeline 6 may include the following steps:

[0111] Step S20: obtaining the pressure of the heat exchange system and / or the flow rate of the heat exchange system;

[0112] Step S22: When the obtained pressure of the heat exchange system is equal to or greater than the preset pressure of the first heat source 1, and / or when the obtained flow rate of the heat exchange system is equal to or less than the preset flow rate of the second heat source 2, increase the flow rate of the bypass pipeline 6.

[0113] In this embodiment, the step of obtaining the pressure of the heat exchange system and / or the flow rate of the heat exchange system can refer to the above-mentioned step S10, and this application will not elaborate on it here.

[0114] The step of increasing the flow rate of the bypass line 6 may specifically include: increasing the flow rate of the opened bypass line 6 and / or increasing the number of opened bypass lines 6.

[0115] When a flow-adjustable valve is provided in the bypass line 6, the flow of the bypass line 6 can be increased by adjusting the opening of the valve. In addition, at least one bypass line 6 can be provided with an unopened valve, and the unopened valve can be opened when it is necessary to increase the flow of the bypass line 6. In addition, these two operations can also be performed simultaneously.

[0116] The present application also provides a controller, which is configured to be able to execute the control method provided in any of the above embodiments. The controller at least includes: an acquisition module, which is used to acquire the pressure of the heat exchange system and / or the flow of the heat exchange system; a control module, which is used to increase the opening degree of the opened flow control device 4 and / or adjust the opening quantity of the flow control device 4 when the acquired pressure of the heat exchange system is equal to or greater than the preset pressure of the first heat source 1, and / or when the acquired flow of the heat exchange system is equal to or less than the preset flow of the second heat source 2.

[0117] The acquisition module is used to obtain the pressure of the heat exchange system and / or the flow of the heat exchange system. The specific form of the acquisition module may vary depending on the target parameters to be obtained, and the present application does not make specific limitations here. The control module is used to increase the opening of the opened flow control device 4 and / or adjust the opening quantity of the flow control device 4 when the pressure of the heat exchange system obtained is equal to or greater than the preset pressure of the first heat source 1, and / or when the flow of the heat exchange system obtained is equal to or less than the preset flow of the second heat source 2. The working principle of the controller and the technical effects that can be achieved can refer to the specific description of the above-mentioned control method, and the present application will not repeat them here.

[0118] See also Figure 2 , Figure 4 and Figure 5 This specification also provides a heat exchange system, which may include: the controller as described above, at least two heat exchangers that can communicate with the controller, a first heat source 1 and a second heat source 2 connected to the heat exchanger through a pipeline, and a flow control device 4 arranged in the pipeline for independently controlling the flow of the at least two heat exchangers.

[0119] In this embodiment, the controller can communicate with the first heat source 1, the second heat source 2 and the heat exchanger. The controller can be independently set with the first heat source 1 and the second heat source 2, or can be integrated with the first heat source 1 or the second heat source 2. The specific application is not specifically limited here. When in use, the controller can establish communication with the first heat source 1, the second heat source 2, the heat exchanger and the electronic control elements in the pipeline.

[0120] The first heat source 1 is also a heating device capable of providing heat. Specifically, the first heat source 1 can be a gas water heater. Of course, the second heat source 2 can also be other heating devices capable of providing heat, such as other new energy heating devices. When the first heat source 1 is a gas water heater, specifically, it can be in the form of a wall-mounted boiler, a gas water heater, etc. In this specification, the second heat source 2 is mainly illustrated by taking a wall-mounted boiler as an example, and other forms can be referred to by analogy, and this application will not be elaborated one by one here.

[0121] The second heat source 2 is an air conditioning device capable of cooling and heating. Specifically, the first heat source 1 may be in the form of a heat pump water heater or an air conditioner. In this specification, the second heat source 2 is mainly illustrated by a heat pump water heater (referred to as a heat pump), and other forms may be referred to by analogy, and this application will not elaborate on them one by one.

[0122] The second heat source 2 is connected to the heat exchanger through the water outlet pipe 51 and the water return pipe 52 to form a circulating water circuit, and the water outlet and the water return of the first heat source 1 are connected in series in the circulating water circuit. When the first heat source 1 is connected in series in the circulating water circuit, the pressure between the first heat source 1 and the second heat source 2 is interconnected, and in particular, the pressure fluctuation of the second heat source 2 will affect the first heat source 1.

[0123] The water outlet and water return of the first heat source 1 are arranged in the water outlet pipeline 51 or the water return pipeline 52. The heat exchange system is provided with a pressure sensor, which is arranged in the pipeline between the water outlet and the first heat source 1 or in the pipeline between the water return and the first heat source 1 or in the internal pipeline of the first heat source 1.

[0124] The pressure sensor is used to obtain the pressure of the heat exchange system. When the pressure sensor is arranged at the above position (especially when arranged in the internal pipeline of the first heat source 1), it can ensure that the pressure value obtained is the pressure of the internal pipeline of the wall-mounted boiler.

[0125] The heat exchange system is provided with a flow sensor, and the flow sensor is arranged in the water outlet pipeline 51 or the water return pipeline 52 or in the internal pipeline of the second heat source 2.

[0126] The flow sensor is used to obtain the flow of the heat exchange system. When the flow sensor is arranged at the above position (especially when arranged in the internal pipeline of the second heat source 2), it can ensure that the flow value obtained is the internal pipeline pressure of the heat pump.

[0127] It should be noted that, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, and they cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0128] The above-mentioned various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0129] The above are only a few embodiments of the present invention. Although the embodiments disclosed by the present invention are as above, the contents are only embodiments adopted for facilitating the understanding of the present invention and are not used to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modification and change in the form and details of the embodiments without departing from the spirit and scope disclosed by the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined by the attached claims.

Claims

1. A method for controlling a heat exchange system, characterized in that: The heat exchange system comprises at least two heat exchangers, a first heat source and a second heat source connected to the heat exchangers through pipelines, and a flow control device arranged in the pipeline for controlling the flow of the at least two heat exchangers, wherein the first heat source comprises a wall-mounted boiler or a gas water heater, and the second heat source comprises a heat pump or an air conditioner; The control method comprises: Obtaining the pressure of the heat exchange system and / or the flow rate of the heat exchange system; When the obtained pressure of the heat exchange system is equal to or greater than the preset pressure of the first heat source, and / or when the obtained flow rate of the heat exchange system is equal to or less than the preset flow rate of the second heat source, increase the opening degree of the opened flow control device and / or adjust the opening quantity of the flow control device.

2. The control method of the heat exchange system according to claim 1, characterized in that: The step of adjusting the opening quantity of the flow control device includes at least any one of the following: Open the flow control devices sequentially according to a predetermined sequence; Open a flow control device randomly; Open the flow control devices one by one in a quantity-adding manner; Open the selected number of flow control devices.

3. The control method of the heat exchange system according to claim 2, characterized in that: The step of opening a selected number of flow control devices includes: opening some or all of the unopened flow control devices.

4. The control method of the heat exchange system according to claim 2, characterized in that: In the process of adjusting the opening quantity of the flow control device, the control method further comprises: monitoring pressure fluctuations of the heat exchange system and identifying pressure fluctuations corresponding to opening each flow control device; After identifying the pressure fluctuation corresponding to each flow control device, the water resistance of each heat exchanger is sorted according to the different effects of the flow control device on the pressure fluctuation; wherein the step of opening the flow control devices in sequence according to the predetermined order is specifically to open the flow control devices based on the sorting results of the water resistance of the heat exchanger.

5. The control method of the heat exchange system according to claim 4, characterized in that: The control method further includes executing the following steps in a predetermined cycle: after identifying the pressure fluctuation corresponding to each flow control device, the water resistance of each heat exchanger is sorted according to the different effects of the flow control device on the pressure fluctuation.

6. The control method of the heat exchange system according to claim 1, characterized in that: The heat exchanger includes heat exchangers with different radiation heat exchange efficiencies, and when performing the step of adjusting the opening number of the flow control device, the heat exchangers are opened in the order of radiation heat exchange efficiency from low to high.

7. The control method of the heat exchange system according to any one of claims 1 to 6, characterized in that: The heat exchanger includes a fan disk, and when the flow control device of the fan disk is turned on, the motor of the fan disk is not started.

8. The control method of the heat exchange system according to any one of claims 1 to 6, characterized in that: After the opening degree of the opened flow control device reaches the maximum and / or the number of opened flow control devices reaches the maximum, if the currently obtained pressure of the heat exchange system is still equal to or greater than the preset pressure of the first heat source, the control method further includes: The operating temperature of the heat exchange system is reduced.

9. The control method of the heat exchange system according to claim 8, characterized in that: The step of reducing the operating temperature of the heat exchange system specifically includes: Lower the operating temperature of the first heat source.

10. The control method of the heat exchange system according to claim 9, characterized in that: After lowering the operating temperature of the first heat source to a preset temperature, if the currently acquired pressure of the heat exchange system is still equal to or greater than the preset pressure of the first heat source, the control method further includes: shutting down the first heat source.

11. The control method of the heat exchange system according to any one of claims 1 to 6, characterized in that: The heat exchange system is provided with a circulation pump. When the pressure of the heat exchange system is greater than or equal to the preset pressure of the first heat source and the flow rate of the heat exchange system is greater than the preset flow rate, or only when the pressure of the heat exchange system is greater than the preset pressure of the first heat source, the control method further includes: Before adjusting the opening quantity of the flow control device, or after adjusting the opening quantity of the flow control device, or during adjusting the opening quantity of the flow control device, the head of the circulation pump is reduced.

12. The control method of the heat exchange system according to any one of claims 1 to 6, characterized in that: The second heat source includes a compressor, and when the flow rate of the heat exchange system is less than a preset flow rate of the second heat source, the control method further includes: Before adjusting the opening quantity of the flow control device, or after adjusting the opening quantity of the flow control device, or when adjusting the opening quantity of the flow control device, the operating frequency of the compressor is reduced.

13. The control method of the heat exchange system according to any one of claims 1 to 6, characterized in that: The step of obtaining the pressure of the heat exchange system is specifically to obtain the pressure of the pipeline and / or the internal pipeline pressure of the first heat source; the step of obtaining the flow of the heat exchange system is specifically to obtain the flow of the pipeline and / or the flow of the fluid flowing through the second heat source.

14. The control method of the heat exchange system according to any one of claims 1 to 6, characterized in that: After the opening degree of the opened flow control device reaches the maximum and / or the number of opened flow control devices reaches the maximum, if the currently obtained pressure of the heat exchange system is still equal to or greater than the preset pressure of the first heat source, and the first heat source is in a state of supplying domestic hot water to the outside, the control method also includes: closing the second heat source.

15. A controller, characterized in that: The controller is configured to execute the control method according to any one of claims 1 to 14, and the controller at least comprises: An acquisition module, used for acquiring the pressure of the heat exchange system and / or the flow rate of the heat exchange system; A control module is used to increase the opening degree of the opened flow control device and / or adjust the opening quantity of the flow control device when the pressure of the heat exchange system obtained is equal to or greater than the preset pressure of the first heat source and / or when the flow of the heat exchange system obtained is equal to or less than the preset flow of the second heat source.

16. A heat exchange system, characterized in that: It includes a controller as described in claim 15, at least two heat exchangers capable of communicating with the controller, a first heat source and a second heat source connected to the heat exchangers through pipelines, and a flow control device arranged in the pipeline for independently controlling the flow of the at least two heat exchangers.

17. The heat exchange system according to claim 16, characterized in that: The second heat source is connected to the heat exchanger through a water outlet pipe and a water return pipe to form a circulating water circuit, and the water outlet end and the water return end of the first heat source are connected in series in the circulating water circuit.

18. The heat exchange system according to claim 17, characterized in that: The water outlet and water return ends of the first heat source are arranged in the water outlet pipeline or the water return pipeline, and the heat exchange system is provided with a pressure sensor, and the pressure sensor is arranged in the pipeline between the water outlet and the first heat source or in the pipeline between the water return end and the first heat source or in the internal pipeline of the first heat source.

19. The heat exchange system according to claim 17, characterized in that: The heat exchange system is provided with a flow sensor, and the flow sensor is arranged in the water outlet pipeline or the water return pipeline or in the internal pipeline of the second heat source.

20. The heat exchange system according to any one of claims 16 to 19, characterized in that: The heat exchanger includes at least one of a fan disk, a floor heater, and a heat sink, or a combination thereof.

21. A method for controlling a heat exchange system, characterized in that: The heat exchange system comprises: a heat exchanger, a first heat source and a second heat source connected to the heat exchanger through a pipeline, and a bypass pipeline connected in parallel with the heat exchanger; the first heat source comprises a wall-mounted boiler or a gas water heater, and the second heat source comprises a heat pump or an air conditioner; the control method comprises: Obtaining the pressure of the heat exchange system and / or the flow rate of the heat exchange system; When the obtained pressure of the heat exchange system is equal to or greater than the preset pressure of the first heat source, and / or when the obtained flow of the heat exchange system is equal to or less than the preset flow of the second heat source, the flow of the bypass pipeline is increased.

22. The control method of the heat exchange system according to claim 21, characterized in that: The step of increasing the flow rate of the bypass pipeline includes: increasing the flow rate of the opened bypass pipeline and / or increasing the number of opened bypass pipelines.

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