Heat exchanger and assembly comprising heat exchanger and three-way valve

Abstract

The utility model provides a heat exchanger and an assembly comprising the heat exchanger and a three-way valve. The heat exchanger comprises a shell, a plurality of fins arranged in the shell side by side and a heat exchange pipeline extending to penetrate through the shell and the fins. The heat exchange pipeline comprises a first heat exchange pipe and a second heat exchange pipe which penetrate through the fins in parallel, and the length of the part, extending to penetrate through the fins, of the first heat exchange pipe is larger than that of the part, extending to penetrate through the fins, of the second heat exchange pipe. By adopting the heat exchanger connected in parallel with the heat exchange pipeline, the equipment can work under different heat loads, so that the situation that the water outlet temperature is not too high when the equipment runs in summer becomes possible.

Description

Technical Field

[0001] The present disclosure relates to the field of combustion equipment, and in particular to a heat exchanger and a component thereof with a three-way valve. Background Art

[0002] Gas water heaters, such as gas water heaters or gas heating furnaces, can be used to provide domestic hot water. Gas water heaters generally operate within the rated heat load range, such as when the required heat load is between the rated maximum heat load and the rated minimum heat load. However, in summer, due to the high ambient temperature, the required heat load is usually less than the rated minimum heat load, and the equipment can only operate at the rated minimum heat load, resulting in excessively high outlet water temperature, which in turn affects the user experience. At present, the commonly used solutions in the industry include reducing the minimum combustion power of a single fire grate, or increasing the water flow rate through a booster pump, or adding an electric heating device or a water storage tank to perform auxiliary heating when the required heat load is small, or adding a bypass pipe between the hot water pipe and the cold water pipe. However, the above solutions will also bring some problems, such as the need to add additional components, resulting in increased costs or the inadequate internal space layout of the equipment, and the reduction of the fire grate power is prone to produce condensed water in the combustion chamber and corrode the components. In view of this, it is necessary to propose a new solution. Utility Model Content

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a heat exchanger and an assembly thereof with a three-way valve.

[0004] A first aspect of an embodiment of the present disclosure provides a heat exchanger, which includes a shell, a plurality of fins disposed in the shell and arranged side by side, and a heat exchange pipeline extending through the shell and the plurality of fins. The heat exchange pipeline includes a first heat exchange tube and a second heat exchange tube that pass through the plurality of fins in parallel, and the length of the portion of the first heat exchange tube extending through the plurality of fins is greater than the length of the portion of the second heat exchange tube extending through the plurality of fins.

[0005] In some embodiments, the first heat exchange tube includes a first water inlet pipe section located outside the shell and not yet passing through the fins, a first water outlet pipe section located outside the shell and having completed passing through the fins, and a first heat exchange pipe section located between the first water inlet pipe section and the first water outlet pipe section. The second heat exchange tube includes a second water inlet pipe section located outside the shell and not yet passing through the fins, a second water outlet pipe section located outside the shell and having completed passing through the fins, and a second heat exchange pipe section located between the second water inlet pipe section and the second water outlet pipe section. The length of the first heat exchange pipe section is greater than the length of the second heat exchange pipe section.

[0006] In some embodiments, each fin has a first through hole for the first heat exchange tube to pass through, and a second through hole for the second heat exchange tube to pass through, wherein the number of the first through holes is greater than the number of the second through holes.

[0007] A second aspect of an embodiment of the present disclosure provides an assembly including a heat exchanger and a three-way valve, which includes an inlet pipe and an outlet pipe, the heat exchanger, and a three-way valve. A first heat exchange pipe and a second heat exchange pipe of the heat exchanger are connected to the inlet pipe and the outlet pipe in parallel. The three-way valve includes a valve body, a valve core arranged in the valve body, and a driving member matched with the valve core, wherein the valve body has a first channel connected to the first heat exchange pipe, a second channel connected to the second heat exchange pipe, and a third channel connected to the inlet pipe or the outlet pipe.

[0008] In some embodiments, the driving member drives the valve core to move between a first extreme position and a second extreme position. When the valve core is at the first extreme position, the first channel has a maximum opening and the second channel has a minimum opening; when the valve core is at the second extreme position, the second channel has a maximum opening and the first channel has a minimum opening.

[0009] In some embodiments, the driving member is a stepper motor.

[0010] The technical solution provided by one or more embodiments of the present disclosure may include the following beneficial effects: by adopting a heat exchanger with parallel heat exchange pipelines, the equipment can operate under different heat loads, thereby making it possible for the water outlet temperature of the equipment not to be too high when operating in summer. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 is a schematic plan view of a gas water heater in one embodiment of the present disclosure;

[0013] Figure 2 yes Figure 1 A schematic plan view of a three-way valve in a gas water heater is shown, wherein the valve core of the three-way valve is in a first limit position;

[0014] Figure 3 yes Figure 1 A schematic plan view of a three-way valve in a gas water heater, wherein the valve core of the three-way valve is in a second limit position;

[0015] Figure 4 yes Figure 1 A schematic plan view of a three-way valve in a gas water heater, wherein the valve core of the three-way valve is in a third position;

[0016] Figure 5 yes Figure 1 A three-dimensional schematic diagram of a heat exchanger in a gas water heater is shown;

[0017] Figure 6 yes Figure 5 A three-dimensional schematic diagram of another perspective of the heat exchanger shown;

[0018] Figure 7 yes Figure 6 The schematic plan view of the heat exchanger shell after being cut vertically;

[0019] Figure 8 is a plan view of a gas water heater in another embodiment of the present disclosure;

[0020] Fig. 9 is a curve diagram showing the relationship between the system efficiency η of the gas water heater and the valve core position K of the three-way valve in the embodiment of the present disclosure;

[0021] Fig.10 1 is a curve diagram showing the relationship between the required heat load Q of the gas water heater and the valve core position K of the three-way valve in the embodiment of the present disclosure. DETAILED DESCRIPTION

[0022] The following will describe the various embodiments shown in detail in conjunction with the accompanying drawings. However, these embodiments do not represent all embodiments consistent with the present disclosure, and any structural, methodological, or functional changes made by a person of ordinary skill in the art based on these implementations are all included in the protection scope requested by the attached claims.

[0023] Gas water heaters use combustible gas as fuel, such as natural gas, city gas, liquefied gas, biogas, etc., and provide heat to meet the user's living needs by burning combustible gas, for example, a gas water heater that provides domestic hot water, or a dual-purpose gas boiler that can provide domestic hot water and heating needs at the same time. The following embodiments will be described by taking a gas water heater as an example.

[0024] like Figure 1 A specific embodiment of the gas water heater of the present disclosure is shown, and the device includes a housing 10, a burner assembly housed in the housing 10, an assembly including a heat exchanger and a three-way valve, and a smoke exhaust device (not shown). The housing 10 can be formed by splicing a plurality of panels to form a receiving space therein to accommodate various components. The assembly including the heat exchanger and the three-way valve includes an inlet pipe 111 and an outlet pipe 112, a heat exchanger, and a three-way valve 20. Among them, the inlet pipe 111, the outlet pipe 112, and a gas supply pipeline (not shown) extend through the bottom of the housing 10.

[0025] The burner assembly generally includes a gas distribution frame (not shown) and a burner 12. A gas valve 15 is provided on the gas supply pipeline, and the gas valve 15 can be an electrically controllable valve, which is used to connect or disconnect the gas supply channel and control the gas supply amount entering the gas distribution frame and finally supplied to the burner 12. In some embodiments, the burner 12 includes a plurality of combustion units arranged side by side in the longitudinal direction in its housing (not shown). Each combustion unit is in the shape of a flat plate, which is generally fixed upright in the burner frame, and has an air inlet at the bottom, a plurality of fire holes at the top, and a gas-air mixing channel connecting the air inlet and the plurality of fire holes. The gas through the gas valve 15 enters the air inlet of each combustion unit through the distribution of the gas distribution frame, and is mixed with the primary air entering at the same time in the gas-air mixing channel, and is transferred to the fire holes at the top of the fire row for combustion and generation of hot smoke. The burner assembly generally also includes an ignition device for igniting the gas-air mixture, and a flame detection device for detecting whether a flame exists. In some embodiments, the ignition device includes a pair of ignition electrodes extending above the flame hole of the combustion unit. The flame detection device includes a flame detection electrode extending above the flame hole of the combustion unit.

[0026] A fan 16 is disposed below the burner 12 to drive the gas flow, thereby providing the air required for combustion and causing the smoke generated by the combustion to be collected by the smoke hood of the smoke exhaust device, and then discharged through the smoke exhaust pipe (not shown) connected to the smoke hood. An outlet water temperature sensor 181 is disposed at the outlet pipe 112 (such as on the outer wall of the outlet pipe) to detect the temperature of the hot water output through the outlet pipe; an inlet water temperature sensor 182 is disposed at the inlet pipe 111 (such as on the outer wall of the inlet pipe) to detect the inlet water temperature flowing in through the inlet pipe. The temperature sensor may be a thermistor, such as a positive temperature coefficient thermistor (Positive Temperature Coefficient, PTC). In some embodiments, the temperature sensor may also be a negative temperature coefficient (Negative Temperature Coefficient, NTC) temperature sensor. A flow sensor 19 is disposed in the waterway to detect the water flow. In some embodiments, the flow sensor can be installed at the water inlet pipe 111 to detect the water inlet flow rate. It may include a rotor assembly with a magnet and a Hall element. When water flows through the detection device 19, the rotor assembly is driven to rotate, thereby utilizing the Hall effect of the Hall element to measure the magnetic physical quantity.

[0027] Reference Figure 1 , and with reference Figures 5 to 7As shown, the heat exchanger is usually arranged above the burner 12. The heat exchanger can be a fin-tube heat exchanger, which includes a shell 130, a plurality of fins 135 disposed in the shell and arranged side by side in the transverse direction, and a heat exchange pipeline extending through the shell 130 and the plurality of fins 135. In some embodiments, the bottom of the heat exchanger shell 130 (with a flange formed) and the top of the burner shell (with a flange formed) are spliced ​​together to form a sealed combustion chamber shell to allow the hot flue gas generated by the combustion of the burner 12 to rise vertically through the heat exchanger, at which time, the heat carried by the flue gas is absorbed by the fins 135 and further transferred to the heat exchange pipeline passing through the fins to heat the water flow therein. The heat exchange pipeline includes a first heat exchange tube 131 and a second heat exchange tube 132 that pass through the plurality of fins in parallel. In some embodiments, the length of the portion of the first heat exchange tube 131 extending through the plurality of fins 135 is greater than the length of the portion of the second heat exchange tube 132 extending through the plurality of fins 135. Here, “the length of the portion of the heat exchange pipe extending through the above-mentioned plurality of fins” refers to the length of the portion of the heat exchange pipe orthogonal to the plurality of fins, that is, the effective heat exchange length of the heat exchange pipe.

[0028] like Figure 1 As shown, the first heat exchange pipe 131 includes a first water inlet pipe section 1311 located outside the shell 130 and not yet passing through the fins 135, a first water outlet pipe section 1313 located outside the shell 130 and having already passed through the fins 135, and a first heat exchange pipe section 1312 located between the first water inlet pipe section 1311 and the first water outlet pipe section 1313. Figure 5 and Figure 6As shown, in this embodiment, the first water inlet pipe section 1311 is located between the water inlet pipe 111 and the shell 130, one end of which is connected to the three-way valve 20, and then coiled several times outside the combustion chamber shell for cooling, and the other end is located at the interface between the shell 130 and the pipeline; the first heat exchange pipe section 1312 passes through the above-mentioned fins 135 in a circuitous manner and then passes through the shell 130 to connect with the first water outlet pipe section 1313; the first water outlet pipe section 1313 is located between the water outlet pipe 112 and the shell 130, one end of which is located at the interface between the shell 130 and the pipeline, and the other end is connected to the water outlet pipe 112. The second heat exchange pipe 132 includes a second water inlet pipe section 1321 located outside the shell and not yet passing through the fins, a second water outlet pipe section 1323 located outside the shell and having completed passing through the fins, and a second heat exchange pipe section 1322 located between the second water inlet pipe section and the second water outlet pipe section. In this embodiment, the second water inlet pipe section 1321 is located between the water inlet pipe 111 and the shell 130, one end of which is connected to the three-way valve 20, and the other end is located at the interface between the shell 130 and the pipeline; the second heat exchange pipe section 1322 passes through the above-mentioned plurality of fins 135 and then directly passes through the shell 130 to connect with the second water outlet pipe section 1323; the second water outlet pipe section 1323 is located between the water outlet pipe 112 and the shell 130, one end of which is located at the interface between the shell 130 and the pipeline, and the other end is connected to the water outlet pipe 112.

[0029] In some embodiments, the length of the first heat exchange pipe section 1312 is greater than the length of the second heat exchange pipe section 1322, and the effective heat exchange length of the first heat exchange pipe section 1312 is also greater than the effective heat exchange length of the second heat exchange pipe section 1322. Figure 7 As shown, each fin 135 has a first through hole 1351 for the first heat exchange tube 131 to pass through, and a second through hole 1352 for the second heat exchange tube 132 to pass through, wherein the number of the first through holes 1351 is greater than the number of the second through holes 1352. In this embodiment, the first heat exchange tube segment 1312 passes through the plurality of fins 135 seven times in a circuitous manner, while the second heat exchange tube segment 1312 passes through the plurality of fins 135 only once, so the effective heat exchange length of the first heat exchange tube segment 1312 is seven times the effective heat exchange length of the second heat exchange tube segment 1322; accordingly, the number of the first through holes 1351 is seven, while the number of the second through hole 1352 is only one.

[0030] Reference Figures 1 to 4As shown, in some embodiments, the three-way valve 20 connects the water inlet pipe 111, the first and second heat exchange pipes 131, 132. The three-way valve 20 includes a valve body 21, a valve core 22 disposed in the valve body, and a driving member 23 that cooperates with the valve core. The valve body 21 has a first channel 211 connected to the first heat exchange pipe 131, a second channel 212 connected to the second heat exchange pipe 132, and a third channel 213 connected to the water inlet pipe 111. In some embodiments, the driving member 23 can drive the valve core 22 to move between a first extreme position and a second extreme position. Figure 2 As shown, when the valve core 22 is at the first limit position, the first channel 211 has a maximum opening, and the second channel 212 has a minimum opening; accordingly, at this time, the first heat exchange tube 131 maintains full flow operation, while the second heat exchange tube 132 only maintains a minimum flow. Figure 3 As shown, when the valve core 22 is at the second limit position, the second channel 212 has a maximum opening, and the first channel 211 has a minimum opening; accordingly, at this time, the second heat exchange tube 132 maintains full flow operation, while the first heat exchange tube 131 only maintains a minimum flow. Figure 4 As shown, when the valve core 22 is in the third position between the first limit position and the second limit position, the first channel 211 and the second channel 212 are both partially opened; accordingly, at this time, the first heat exchange tube 131 and the second heat exchange tube 132 are both operated at an intermediate flow rate between the maximum flow rate and the minimum flow rate. In some embodiments, the driving member 23 is a stepping motor, so that the movement position of the valve core 22 can be achieved by controlling the stepping number of the stepping motor to achieve the corresponding opening of the first channel 211 and the second channel 212.

[0031] A controller 17 is arranged in the housing 10 for detecting and controlling the operation of each circuit device in the gas water heater. In some embodiments, the controller 17 may be a control circuit including a processor and a memory, and a plurality of electronic components connected in a certain wiring manner. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor. In this embodiment, the processor is the control center of the gas water heater, which uses various interfaces and lines to connect various parts of the device. For example, the controller 17 is connected to the inlet water temperature sensor 182, the outlet water temperature sensor 181, and the flow sensor 19 to detect the inlet and outlet water temperatures and water flow rates accordingly, and is connected to the gas valve 15, the fan 16, the driving member 23 of the three-way valve, etc. to control the operation of the corresponding components.

[0032] When the gas water heater is normally running, the controller 17 first calculates the required heat load, and then controls the operation of the gas valve 15 and the fan 16 accordingly according to the calculated required heat load, so that the water temperature rises to the target temperature. The calculation of the required heat load Q is usually obtained according to the formula Q = c × m × (Ttar-Tin). Among them, c is the specific heat capacity of water, m is the current water flow, Ttar is the target temperature, and Tin is the current inlet water temperature. In other words, the controller 17 will obtain the target temperature of the heated water that is pre-set and stored by the user from the memory, and then calculate the required heat load Q according to the target temperature, the current inlet water temperature detected by the inlet water temperature sensor, and the current water flow detected by the flow sensor. In some embodiments, in order to achieve more precise control, the system efficiency η is also introduced when calculating the heat load. At this time, the calculation formula of the required heat load is Q = c × m × (Ttar-Tin) / η. In some devices, such as non-condensing devices, the system efficiency η is usually less than 1, such as 85% to 89%; in other devices, such as condensing devices, the system efficiency η can be greater than 1, such as 100% to 109%.

[0033] When the calculated heat load Q is greater than or equal to the first heat load threshold Qthre1, the controller 17 controls the drive member 23 to drive the valve core 22 to move to the first extreme position K1. In some embodiments, the controller 17 controls the number of steps of the stepper motor, such as 100 steps, to move the valve core to the first extreme position K1. In some embodiments, the first heat load threshold Qthre1 depends on the rated minimum heat load Qmin of the device, for example, Qthre1=Qmin, and in other embodiments, Qthre1 may also be slightly higher or slightly lower than Qmin. When the calculated heat load Q is less than or equal to the second heat load threshold Qthre2, the controller 17 controls the drive member 23 to drive the valve core 22 to move to the second extreme position K2; wherein the second heat load threshold Qthre2 is less than the first heat load threshold Qthre1, for example, Qthre2=0.5Qmin. In some embodiments, the controller 17 controls the number of steps of the stepper motor, such as 10 steps, to move the valve core to the second extreme position K2. When the calculated heat load Q is greater than the second heat load threshold Qthre2 but less than the first heat load threshold Qthre1, the controller 17 controls the driving member 23 to drive the valve core 22 to move to a third position between the first limit position K1 and the second limit position K2. Fig.10 As shown, in some embodiments, the heat load Q is linearly related to the movement position K of the valve core, for example, directly proportional. The third position can be determined based on this relationship and the heat load Q calculated at this time, such as a step number between 10 steps and 100 steps, and then the valve core 22 is driven to move to the corresponding position.

[0034] In some embodiments, in order to achieve more precise control and better hot water comfort, the controller also determines the system efficiency η according to the movement position of the valve core, and readjusts the required heat load Q according to the system efficiency η. Fig. 9 As shown, in some embodiments, the system efficiency η is linearly related to the movement position K of the valve core, for example, directly proportional. The system efficiency η can be determined based on this relationship and the movement position K of the valve core at this time, and then the required heat load Q is recalculated according to the formula Q=c×m×(Ttar-Tin) / η, and corresponding control is performed.

[0035] Figure 8 The gas water heater 200 in another embodiment of the present disclosure is shown. Figure 1The main difference of the gas water heater 100 shown is the installation position of the three-way valve 20. In this embodiment, the heat exchanger also includes a shell 140, a plurality of fins 145, and a first heat exchange tube and a second heat exchange tube arranged in parallel. Among them, the first heat exchange tube also includes a first water inlet pipe section 1411 located outside the shell 140 and not yet passing through the fins 145, a first water outlet pipe section 1413 located outside the shell 140 and having completed passing through the fins 145, and a first heat exchange pipe section 1412 located between the first water inlet pipe section 1411 and the first water outlet pipe section 1413; the second heat exchange tube also includes a second water inlet pipe section 1421 located outside the shell and not yet passing through the fins, a second water outlet pipe section 1423 located outside the shell and having completed passing through the fins, and a second heat exchange pipe section 1422 located between the second water inlet pipe section and the second water outlet pipe section. In this embodiment, the first channel of the three-way valve 20 is communicated with the first heat exchange pipe, the second channel thereof is communicated with the second heat exchange pipe, and the third channel thereof is communicated with the water outlet pipe.

[0036] By using a heat exchanger with parallel heat exchange pipelines, the device can work under different heat loads, so that the outlet water temperature of the device will not be too high when it is running in summer. In some embodiments, the parallel heat exchange pipelines have different effective heat exchange lengths, so that the heat exchanger can work at different heat exchange efficiencies to meet different required heat loads. In some embodiments, the water flow in the parallel heat exchange pipelines is controlled by adjusting the position of the three-way valve core, thereby adjusting the heat exchange efficiency of the heat exchanger. In some embodiments, the position of the three-way valve core is adjusted according to the heat load to achieve the corresponding heat exchange efficiency of the heat exchanger; preferably, the maximum heat exchange efficiency of the heat exchanger corresponds to the rated minimum heat load of the device, so that the device can work below the rated minimum heat load. In some embodiments, after the position adjustment of the three-way valve core is completed, the corresponding system efficiency is determined to recalculate the required heat load to ensure that the output water temperature is more accurately controlled and the user's water experience is more comfortable.

[0037] In the above disclosure, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the definition of "first", "second", etc. can explicitly or implicitly include at least one of the features. In the above description, the meaning of "several", "multiple", and other similar terms is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In the above disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0039] In the above disclosure, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first feature is in direct contact with the second feature, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above", "above", or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below", or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] It should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A heat exchanger comprising a shell, a plurality of fins disposed in the shell and arranged side by side, and a heat exchange pipeline extending through the shell and the plurality of fins; characterized in that: The heat exchange pipeline includes a first heat exchange tube and a second heat exchange tube passing through the fins in parallel, and a length of a portion of the first heat exchange tube extending through the fins is greater than a length of a portion of the second heat exchange tube extending through the fins.

2. The heat exchanger according to claim 1, characterized in that: The first heat exchange tube includes a first water inlet pipe section located outside the shell and not yet passing through the fins, a first water outlet pipe section located outside the shell and having completed passing through the fins, and a first heat exchange tube section located between the first water inlet pipe section and the first water outlet pipe section; the second heat exchange tube includes a second water inlet pipe section located outside the shell and not yet passing through the fins, a second water outlet pipe section located outside the shell and having completed passing through the fins, and a second heat exchange tube section located between the second water inlet pipe section and the second water outlet pipe section; wherein the length of the first heat exchange tube section is greater than the length of the second heat exchange tube section.

3. The heat exchanger according to claim 1, characterized in that: Each fin has a first through hole for the first heat exchange tube to pass through, and a second through hole for the second heat exchange tube to pass through, wherein the number of the first through holes is greater than the number of the second through holes.

4. An assembly comprising a heat exchanger and a three-way valve, characterized in that: This component includes Inlet and outlet pipes; The heat exchanger according to any one of claims 1 to 3, wherein the first heat exchange tube and the second heat exchange tube are connected in parallel to a water inlet pipe and a water outlet pipe; A three-way valve comprises a valve body, a valve core arranged in the valve body, and a driving member cooperating with the valve core. The valve body has a first channel connected to a first heat exchange tube, a second channel connected to a second heat exchange tube, and a third channel connected to a water inlet pipe or a water outlet pipe.

5. The assembly comprising a heat exchanger and a three-way valve according to claim 4, characterized in that: The driving member drives the valve core to move between a first extreme position and a second extreme position; when the valve core is located at the first extreme position, the first channel has a maximum opening and the second channel has a minimum opening; when the valve core is located at the second extreme position, the second channel has a maximum opening and the first channel has a minimum opening.

6. The assembly comprising a heat exchanger and a three-way valve according to claim 4, characterized in that: The driving component is a stepping motor.

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