Heat exchange equipment, air conditioner, air volume control method and device

Abstract

The present invention discloses a heat exchange device and an air conditioner, and an air volume control method and device. The heat exchange device includes: a heat exchanger and at least one wind grille; the heat exchanger includes at least two heat exchange zones, and the at least one wind grille is respectively installed on the air inlet side of at least one of the at least two heat exchange zones, and the blade opening angle of the wind grille is adjustable. The present invention installs a wind grille with an adjustable blade opening angle on the air inlet side of the heat exchange zone of the heat exchanger, and the air flow direction entering the heat exchanger can be adjusted by adjusting the blade opening angle, changing the air intake process, thereby improving the problem of uneven distribution of wind speed and air volume in the heat exchanger, and improving the heat exchange efficiency and heat exchange performance of the heat exchanger.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a heat exchange device, an air conditioner, and an air volume control method and device. Background Art

[0002] In today's refrigeration and air conditioning industry, the outdoor heat exchanger of the variable frequency upper air outlet air conditioner can be designed as an upper and lower layered structure. The upper heat exchange area and the lower heat exchange area can be controlled separately, and each has its own flow divider and electronic expansion valve. Since the fan is above the heat exchanger, the wind speed is attenuated from top to bottom, that is, the wind speed in the upper heat exchange area is high and the wind speed in the lower heat exchange area is low, resulting in uneven distribution of the overall air intake of the heat exchanger.

[0003] When the air conditioner is running at low load, the compressor and fan frequencies are usually reduced, and the refrigerant flow in the lower heat exchange area of ​​the outdoor heat exchanger is adjusted at the same time. However, when the refrigerant flow in the lower heat exchange area changes, the lower air volume cannot change synchronously, resulting in low overall energy efficiency of the air conditioner or the performance of the upper heat exchange area cannot reach the optimal state. For example, both the upper heat exchange zone and the lower heat exchange zone are used, and the refrigerant flow rate in the lower heat exchange zone is reduced. Since the wind speed in the lower heat exchange zone is low, the heat exchange is poor, and the lower heat exchange zone occupies a certain refrigerant volume, the refrigerant flow rate is slow, the compressor does more work, and the air conditioner energy efficiency is low. For another example, since the wind speed in the upper heat exchange zone is relatively high, only the upper heat exchange zone is needed to meet the low load demand. At this time, the electronic expansion valve in the lower heat exchange zone can be turned off, that is, the refrigerant flow in the lower heat exchange zone is closed to prevent the refrigerant from entering the lower heat exchange zone. However, there is still wind passing through the lower heat exchange zone, and this part of the air volume is wasted. This part of the air volume cannot be effectively applied to the upper heat exchange zone for heat exchange, resulting in the upper heat exchange zone performance not being able to reach the optimal state. Summary of the invention

[0004] The embodiments of the present invention provide a heat exchange device, an air conditioner, and an air volume control method and device, so as to at least solve the problem in the prior art that uneven air volume distribution of a heat exchanger affects heat exchange performance.

[0005] To solve the above technical problems, an embodiment of the present invention provides a heat exchange device, comprising: a heat exchanger and at least one wind grille; the heat exchanger comprises at least two heat exchange zones, the at least one wind grille is respectively installed on the air inlet side of at least one heat exchange zone of the at least two heat exchange zones, and the blade opening angle of the wind grille is adjustable.

[0006] Optionally, the wind grille includes:

[0007] Wind grille frame;

[0008] At least two blades are arranged in sequence in the wind grid frame;

[0009] The blade rotating mechanism is installed on the wind grid frame and connected with the at least two blades.

[0010] Optionally, the wind grid frame has a first side and a second side opposite to each other, and one end of each of the blades is connected to the first side, and the other end is connected to the second side.

[0011] Optionally, the blade rotation mechanism comprises: at least two rotating shafts, a motor and a transmission component;

[0012] The at least two rotating shafts correspond to the at least two blades one by one, respectively, and the blades are installed in the wind grid frame through the corresponding rotating shafts;

[0013] Each of the rotating shafts comprises a first end and a second end, and the transmission component is sleeved on the first ends of all the rotating shafts;

[0014] The motor is arranged on the first end of the designated rotating shaft, and the motor drives the blades to rotate through the transmission component and the at least two rotating shafts.

[0015] Optionally, the wind grille also includes: at least one support bar installed in the wind grille frame, each of the support bars is provided with at least two through holes, the at least two through holes correspond one-to-one to the positions of the at least two blades, and each of the blades passes through the through holes at corresponding positions on all the support bars.

[0016] Optionally, if only one wind grille is installed, the wind grille is installed on the air inlet side of the target heat exchange zone, and the target heat exchange zone is the heat exchange zone with the lowest wind speed at the same fan frequency among all heat exchange zones when the wind grille is not installed.

[0017] Optionally, the blade opening angle of the wind grille ranges from 0 degrees to 90 degrees.

[0018] Optionally, the heat exchange device further includes: a fan, wherein the fan is disposed above the heat exchanger and generates negative pressure at the heat exchanger.

[0019] An embodiment of the present invention further provides an air conditioner, comprising: the heat exchange device described in the embodiment of the present invention.

[0020] Optionally, the heat exchange device is located in the outdoor unit.

[0021] The embodiment of the present invention further provides an air volume control method, which is applied to the air conditioner described in the embodiment of the present invention, and the method includes:

[0022] obtaining a capacity requirement of the air conditioner;

[0023] The blade opening angle of the air grille of the air conditioner is controlled according to the capacity requirement.

[0024] Optionally, controlling the blade opening angle of the air grille of the air conditioner according to the capacity requirement includes:

[0025] Determine the corresponding control relationship between each heat exchange zone of the heat exchanger and the electronic expansion valve;

[0026] Determining the number of wind grilles installed on the heat exchanger;

[0027] According to the corresponding control relationship, the number of the air grilles and the capacity requirement, the blade opening angle of the air grille in the air conditioner is controlled.

[0028] Optionally, if the number of the air grille is one, and each heat exchange zone of the heat exchanger is controlled by a corresponding electronic expansion valve to control the refrigerant flow rate, controlling the blade opening angle of the air grille in the air conditioner includes:

[0029] If the capacity demand is greater than a first preset threshold value, and / or the electronic expansion valve corresponding to the heat exchange area where the wind grid is installed is at the maximum opening, the blade opening angle of the wind grid is controlled to be a first angle;

[0030] If the capacity requirement is greater than the second preset threshold and less than or equal to the first preset threshold, and / or the opening of the electronic expansion valve corresponding to the heat exchange area where the wind grille is installed is the maximum opening multiplied by the capacity requirement, then the blade opening angle of the wind grille is controlled to be the second angle;

[0031] If the capacity demand is less than or equal to the second preset threshold, and / or the electronic expansion valve corresponding to the heat exchange area where the wind grid is installed is closed, the blade opening angle of the wind grid is controlled to be 0;

[0032] Wherein, the second angle is smaller than the first angle.

[0033] Optionally, the first angle is calculated by the following formula:

[0034] F1=F0×Δt1, wherein F1 represents the first angle, F0=90°, and Δt1 represents a first simulation coefficient of a preset heat exchanger air volume distribution.

[0035] Optionally, the second angle is calculated by the following formula:

[0036] F2=F0×Qc, wherein F2 represents the second angle, F0=90°, and Qc represents the capacity requirement.

[0037] Optionally, if the number of the air grille is one, and each heat exchange zone of the heat exchanger is controlled by the same electronic expansion valve to control the refrigerant flow, controlling the blade opening angle of the air grille in the air conditioner includes:

[0038] If the capacity requirement is greater than a third preset threshold, controlling the blade opening angle of the wind grille to be a third angle;

[0039] If the capacity requirement is less than or equal to the third preset threshold, the blade opening angle of the wind grid is controlled to be a fourth angle, wherein the third angle is greater than the fourth angle.

[0040] Optionally, the third angle is calculated by the following formula:

[0041] F3=F0×Δt2, wherein F3 represents the third angle, F0=90°, and Δt2 represents the second simulation coefficient of the preset heat exchanger air volume distribution.

[0042] Optionally, the fourth angle is calculated by the following formula:

[0043] F4=F0×Qc,

[0044] Wherein, F4 represents the fourth angle, F0=90°, and Qc represents the capacity requirement.

[0045] Optionally, if the number of the air grilles is at least two, and each heat exchange zone of the heat exchanger is controlled by the same electronic expansion valve to control the refrigerant flow, controlling the blade opening angle of the air grille in the air conditioner includes:

[0046] Controlling the opening angle of the blades of the first air grille to be greater than the opening angle of the blades of the second air grille;

[0047] Among them, the heat exchange area where the first wind grille is installed has a higher wind speed than the heat exchange area where the second wind grille is installed at the same fan frequency when the wind grille is not installed, and the blade opening angle of the same wind grille when the capacity demand is greater than the third preset threshold is greater than the blade opening angle when the capacity demand is less than or equal to the third preset threshold.

[0048] Optionally, if the number of the air grilles is at least two, and each heat exchange zone of the heat exchanger is controlled by a corresponding electronic expansion valve to control the refrigerant flow rate, controlling the blade opening angle of the air grille in the air conditioner includes:

[0049] For at least two heat exchange zones where air grilles are installed and the corresponding electronic expansion valves are in an open state, controlling the opening angle of the blades of the first air grille to be greater than the opening angle of the blades of the second air grille;

[0050] Wherein, the heat exchange area where the first wind grid is installed has a higher wind speed at the same fan frequency than the heat exchange area where the second wind grid is installed when the wind grid is not installed, and the larger the opening of the electronic expansion valve corresponding to the same wind grid, the larger the opening angle of the blades of the wind grid;

[0051] For the heat exchange area where the air grid is installed and the corresponding electronic expansion valve is in the closed state, the blade opening angle of the corresponding air grid is controlled to be 0.

[0052] The embodiment of the present invention further provides an air volume control device, which is applied to the air conditioner described in the embodiment of the present invention, and the device includes:

[0053] An acquisition module, used for acquiring the capacity requirement of the air conditioner;

[0054] A control module is used to control the opening angle of the blades of the air grille of the air conditioner according to the capacity requirement.

[0055] The embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored, wherein when the program is executed by a processor, the air volume control method as described in the embodiment of the present invention is implemented.

[0056] Applying the technical solution of the present invention, the heat exchange equipment includes a heat exchanger and at least one wind grille, the heat exchanger includes at least two heat exchange zones, and the at least one wind grille is installed one-to-one on the air inlet side of at least one of the heat exchange zones. The blade opening angle of the wind grille is adjustable. By adjusting the blade opening angle, the air flow direction entering the heat exchanger can be adjusted, and the air intake process can be changed, thereby improving the problem of uneven distribution of wind speed and air volume in the heat exchanger, and improving the heat exchange efficiency and heat exchange performance of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 The structure of the heat exchange device provided in the first embodiment of the present invention is shown in FIG. Figure 1 ;

[0058] Figure 2 The structure of the heat exchange device (U-shaped) provided in the first embodiment of the present invention is shown in FIG. Figure 1 ;

[0059] Figure 3 is a schematic diagram of the structure of the wind grille provided in the first embodiment of the present invention;

[0060] Figure 4 is a structural schematic diagram of a blade rotating mechanism provided in Embodiment 1 of the present invention;

[0061] Figure 5 is a schematic diagram of the blade opening angle provided in the first embodiment of the present invention;

[0062] Figure 6 The structure of the heat exchange device provided in the first embodiment of the present invention is shown in FIG. Figure 2 ;

[0063] Figure 7 The structure of the heat exchange device (U-shaped) provided in the first embodiment of the present invention is shown in FIG. Figure 2 ;

[0064] Figure 8 1 is a schematic diagram comparing wind field distribution with and without wind grids provided in the first embodiment of the present invention;

[0065] Fig. 9 is a flow chart of the air volume control method provided in Embodiment 3 of the present invention;

[0066] Fig.10 It is a structural block diagram of the air volume control device provided in the fourth embodiment of the present invention. DETAILED DESCRIPTION

[0067] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0068] Embodiment 1

[0069] This embodiment provides a heat exchange device, referring to Figure 1 The heat exchange equipment includes: a heat exchanger 1 and at least one wind grille 2, the heat exchanger 1 includes at least two heat exchange zones, at least one wind grille 2 is respectively installed on the air inlet side of at least one heat exchange zone in the at least two heat exchange zones, and the blade opening angle of the wind grille 2 is adjustable.

[0070] The wind grille can be fixedly installed or movably installed on the heat exchanger through a connecting component. The blade opening angle refers to the angle of the blade relative to its own closed state. By controlling the blade opening angle, the air intake process of the heat exchanger can be effectively controlled to improve the problem of uneven distribution of wind speed and air volume. Exemplarily, taking two heat exchange zones as an example, the heat exchanger can be a heat exchanger with an upper and lower layered structure, that is, the heat exchanger includes an upper heat exchange zone and a lower heat exchange zone, and the upper heat exchange zone and the lower heat exchange zone are respectively controlled by their respective corresponding electronic expansion valves. The specific layering ratio is not limited, for example, it can be 1:1; the heat exchanger can also be an integrated heat exchanger, that is, the upper heat exchange zone and the lower heat exchange zone are controlled by the same electronic expansion valve. The refrigerant flow rate. This embodiment does not limit the form and shape of the heat exchanger, which can be a plate heat exchanger, a fin heat exchanger, a U-type heat exchanger, a V-type heat exchanger, etc. In actual applications, in order to ensure comprehensive air volume control, for example, wind grilles can be installed on the three sides of the lower heat exchange zone of the U-shaped heat exchanger, such as Figure 2 As shown, considering that the U-shaped heat exchanger has an arc chamfer, the air grille on each side can have a blade opening angle controlled by a respective motor.

[0071] The heat exchange device of this embodiment includes a heat exchanger and at least one wind grille. The heat exchanger includes at least two heat exchange zones. The at least one wind grille is installed on the air inlet side of at least one of the heat exchange zones in a one-to-one correspondence. The blade opening angle of the wind grille is adjustable. By adjusting the blade opening angle, the air flow direction entering the heat exchanger can be adjusted, and the air intake process can be changed, thereby improving the problem of uneven distribution of wind speed and air volume in the heat exchanger, and improving the heat exchange efficiency and heat exchange performance of the heat exchanger.

[0072] In this embodiment, the shape of the air grille can be set according to the specific structure of the heat exchanger and specific usage requirements, for example, a circular air grille, a rectangular air grille, etc.

[0073] Take the rectangular wind grille as an example, refer to Figure 3 The wind grille 2 includes: a wind grille frame 21; at least two blades 22 arranged in sequence in the wind grille frame; and a blade rotating mechanism 23 installed on the wind grille frame and connected to the at least two blades. The blade opening angle can be adjusted by the blade rotating mechanism to improve the air volume distribution of the heat exchanger. The blade opening angles of all blades in the same wind grille can be synchronously controlled.

[0074] Preferably, the wind grid frame 21 has a first side and a second side opposite to each other, one end of each blade 22 is connected to the first side, and the other end is connected to the second side. Such a parallel arrangement makes it easier to control the blade opening angle.

[0075] refer to Figure 3 and Figure 4 The blade rotation mechanism 23 includes: at least two rotating shafts 231, a motor 232 and a transmission component 233. At least two rotating shafts correspond to at least two blades one by one, and the blades are installed in the wind grid frame through the corresponding rotating shafts; each rotating shaft includes a first end and a second end, and the transmission component is sleeved on the first end of all rotating shafts; the motor is arranged on the first end of the designated rotating shaft, and the motor drives the blades to rotate through the transmission component and at least two rotating shafts to adjust the blade opening angle. The transmission component can be a gear belt or a chain, etc. The designated rotating shaft can be any rotating shaft of the at least two rotating shafts. The motor can be a stepping motor. Through the above-mentioned blade rotation mechanism, the motor drives the transmission component and the rotating shaft to drive the blades to rotate, so that the blade opening angle can be adjusted to improve the air volume distribution of the heat exchanger according to demand.

[0076] refer to Figure 2 The wind grille 2 may also include: at least one support bar 24, installed in the wind grille frame 21, each support bar is provided with at least two through holes, the at least two through holes correspond to the positions of at least two blades, and each blade passes through the through holes at the corresponding positions on all the support bars. By providing the support bar, the blades can be supported to prevent the blades from being deformed due to being too long, which is conducive to better and more accurate control of the blade opening angle.

[0077] The size of the wind grille can be the same as or different from the size of the air inlet side of the heat exchange zone where it is installed. The same size means that the wind grille can fully cover the air inlet side of the heat exchange zone (refer to Figure 1 and Figure 2 As shown), without occupying too much space, it is possible to take into account the improvement of the air volume distribution on the air inlet side of the entire heat exchange area, thereby more effectively improving the heat exchange efficiency.

[0078] If only one wind grille is installed, the wind grille is installed on the air inlet side of the target heat exchange zone, and the target heat exchange zone is the heat exchange zone with the lowest wind speed at the same fan frequency when the wind grille is not installed. In this case, the air flow direction of the heat exchange zone with the lowest wind speed is adjusted specifically to better improve the air volume distribution. For example, a heat exchanger with an upper and lower layered structure can only install one wind grille on the air inlet side of the lower heat exchange zone.

[0079] The blade opening angle F of the wind grille is as follows Figure 5 As shown in the figure, the range of the blade opening angle is 0 to 90 degrees. If the blade opening angle is 90 degrees, it will not improve the wind speed and wind field. Therefore, during the use of the heat exchange equipment, the blade opening angle of the wind grid is controlled to be less than 90 degrees. It can be controlled according to the energy demand of the air conditioner to effectively improve the air volume distribution and improve the heat exchange performance.

[0080] refer to Figure 6 and Figure 7 The heat exchanger includes two heat exchange areas: an upper heat exchange area and a lower heat exchange area. The air inlet sides of the two heat exchange areas are respectively installed with air grilles, which are recorded as the first air grille 3 and the second air grille 4. The height ratio of the first air grille 3 and the second air grille 4 can be adjusted according to the height of the overall heat exchanger. The blade opening angle of the first air grille 3 and the blade opening angle of the second air grille 4 can be controlled separately. The structures of the first air grille 3 and the second air grille 4 can be the same or different.

[0081] Preferably, the heat exchanger is a heat exchanger with upper air outlet, that is, the above heat exchange equipment may further include: a fan 5, which is arranged above the heat exchanger 1, and the fan 5 generates negative pressure at the heat exchanger 1. The fan 5 is spaced apart from the heat exchanger 1 by a preset distance, and the preset distance is filled with air. The fan can drive the air flow within the preset distance on the surface of the heat exchanger 1. The upper side is a relative position, and the fan 5 is arranged above the heat exchanger 1, which can drive the air flow to realize the air outlet from the top of the heat exchanger. For the heat exchanger with upper air outlet, the effect of using the above wind grid structure to improve the uneven distribution of wind speed and air volume is more obvious.

[0082] refer to Figure 8, which is a comparative diagram of wind field distribution with a wind grille (left) and without a wind grille (right). Taking the heat exchanger with top outlet and side inlet as an example, a reverse pressure gradient is formed at the negative pressure center of the fan inside the outdoor unit. Driven by pressure, the intake air of the heat exchanger (especially the lower intake air) will rise close to the negative pressure center of the fan and enter the fan. In the case of no wind grille, the elevation angle of the lower intake flow is relatively low (the intake flow refers to the flow path of the gas entering the heat exchanger, refer to Figure 8 The curve in the figure; the elevation angle can reflect the length of the intake process, Figure 8 The greater the curvature of the middle curve, the lower the elevation angle of the air intake process, that is, the longer the air intake process). Because the air rises to the fan through back pressure, the air flows from high pressure to low pressure, and the air flows to the negative pressure center of the fan (that is, the lowest pressure point), and then rises through this point to enter the fan, resulting in a long air intake process, large kinetic energy loss, and low air flow speed. In the case of a wind grille, the elevation angle of the air intake process from the lower inlet of the heat exchanger to the negative pressure center of the fan is relatively high (that is, Figure 8 The curvature of the middle curve is small), the air intake process is shortened, and the wind speed will increase. For the upper air intake process, since the air intake process without the wind grille is relatively short, the improvement effect of the wind grille on the upper air intake process is not obvious. Therefore, by setting the wind grille, the overall wind speed of the heat exchanger can be made more uniform.

[0083] Embodiment 2

[0084] The present embodiment provides an air conditioner, comprising: the heat exchange device described in the above-mentioned embodiment 1. The air conditioner of the present embodiment is provided with at least one wind grille with an adjustable blade opening angle installed one by one on the air inlet side of at least one heat exchange zone of the heat exchanger, and the air flow direction entering the heat exchanger can be adjusted by adjusting the blade opening angle, thereby changing the air intake process, thereby improving the problem of uneven distribution of wind speed and air volume of the heat exchanger, and improving the heat exchange efficiency and heat exchange performance of the heat exchanger.

[0085] Although the indoor heat exchanger also has the problem of uneven air volume distribution, the indoor heat exchanger is generally small in size, and the impact of uneven air volume distribution is not obvious. Preferably, the above-mentioned heat exchange equipment can be located in the outdoor unit, thereby effectively improving the wind speed distribution problem of the outdoor heat exchanger and ensuring the outdoor heat exchange performance.

[0086] Embodiment 3

[0087] This embodiment provides an air volume control method, which is applied to the air conditioner described in the above embodiment 2. Fig. 9 As shown, the method comprises the following steps:

[0088] S901: Obtain the capacity requirement of the air conditioner.

[0089] S902: Control the opening angle of the blades of the air grille of the air conditioner according to the capacity requirement.

[0090] The capacity demand of the air conditioner indicates the operating load demand of the air conditioner. The capacity demand may be the ratio of the cooling or heating capacity value of the indoor unit in operation to the rated capacity value of the air conditioner.

[0091] Taking into account the uneven distribution of wind speed in the heat exchanger, which is mainly manifested in the low wind speed in the lower heat exchange area, when the air conditioning load changes or the refrigerant flow in the lower heat exchange area changes, the air volume cannot change synchronously, thereby affecting the heat exchange performance. This embodiment is based on the structure of the heat exchange equipment described in Example 1, combined with the structural characteristics of the heat exchanger and the capacity requirements of the air conditioner to adjust the blade opening angle of the wind grid, change the air intake process from the heat exchanger inlet to the negative pressure center of the fan, thereby changing the wind speed, making the wind speed and air volume more uniform, and improving the heat exchange performance.

[0092] The air volume control method of this embodiment adjusts the blade opening angle of the air grille of the air conditioner based on the capacity requirements of the air conditioner, which can adjust the air flow direction entering the heat exchanger and change the air intake process, thereby improving the problem of uneven wind speed and air volume distribution in the heat exchanger and improving the heat exchange efficiency and heat exchange performance of the heat exchanger.

[0093] Furthermore, the blade opening angle of the air grille in the air conditioner is controlled according to the capacity requirement, including: determining the corresponding control relationship between each heat exchange zone of the heat exchanger and the electronic expansion valve; determining the number of air grilles installed on the heat exchanger; and controlling the blade opening angle of the air grille in the air conditioner according to the corresponding control relationship, the number of air grilles and the capacity requirement.

[0094] Among them, the corresponding control relationship between each heat exchange zone of the heat exchanger and the electronic expansion valve includes: each heat exchange zone of the heat exchanger is respectively controlled by its corresponding electronic expansion valve to control the refrigerant flow, or each heat exchange zone of the heat exchanger is controlled by the same electronic expansion valve to control the refrigerant flow.

[0095] This embodiment controls the blade opening angle of the air grille in the air conditioner according to the corresponding control relationship between each heat exchange zone of the heat exchanger and the electronic expansion valve, the number of air grilles installed on the heat exchanger and the capacity requirements of the air conditioner. It can effectively and reliably adjust the blade opening angle of the air grille to effectively improve the problem of uneven distribution of wind speed and air volume in the heat exchanger, and improve the heat exchange efficiency and heat exchange performance of the heat exchanger.

[0096] The following is a detailed description of the steps for adjusting the blade opening angle.

[0097] (1) If there is only one air grille, and each heat exchange zone of the heat exchanger is controlled by a corresponding electronic expansion valve to control the refrigerant flow, the blade opening angle of the air grille in the air conditioner is controlled, including:

[0098] If the capacity demand is greater than a first preset threshold value, and / or the electronic expansion valve corresponding to the heat exchange area where the wind grid is installed is at the maximum opening, the blade opening angle of the wind grid is controlled to be a first angle;

[0099] If the capacity requirement is greater than the second preset threshold and less than or equal to the first preset threshold, and / or the opening of the electronic expansion valve corresponding to the heat exchange area where the wind grille is installed is the maximum opening multiplied by the capacity requirement, then the blade opening angle of the wind grille is controlled to be the second angle;

[0100] If the capacity demand is less than or equal to the second preset threshold, and / or the electronic expansion valve corresponding to the heat exchange area where the wind grid is installed is closed, the blade opening angle of the wind grid is controlled to be 0.

[0101] The first angle and the second angle are both greater than 0, and the second angle is less than the first angle. The first preset threshold and the second preset threshold can be preset according to control requirements, for example, the first preset threshold is set to 50%, and the second preset threshold is set to 30%.

[0102] In general, the larger the range of capacity requirements or the greater the heat exchange demand in the heat exchange zone, the larger the opening angle of the wind grid blades, so that the wind speed and air volume of the heat exchanger can be distributed as evenly as possible while ensuring that the operating requirements are met, thereby improving the heat exchange performance.

[0103] When the capacity demand is large, in order to meet the capacity demand, at least two heat exchange zones need to be operated. The electronic expansion valve corresponding to the heat exchange zone in operation can be opened to the maximum degree. If the heat exchange zone in operation is equipped with a wind grille, the wind speed of the heat exchange zone can be increased by controlling the blade opening angle of the wind grille corresponding to the heat exchange zone in operation, and the uniformity of the wind speed distribution of the heat exchanger can be improved, so that the heat exchange zone can achieve sufficient heat exchange between the refrigerant and the air and meet the user's needs as soon as possible. When the capacity demand is low, only the heat exchange zone with a higher wind speed can be operated, and the electronic expansion valves corresponding to other heat exchange zones can be closed. If the heat exchange zone that is not in operation is equipped with a wind grille, the wind grille corresponding to the heat exchange zone that is not in operation can be closed at this time. There is no air volume passing through the heat exchange zone, thereby increasing the internal negative pressure of the heat exchange zone in operation, increasing its wind speed, and more wind will enter the heat exchange zone in operation, enhancing the heat exchange effect of the heat exchange zone. When the capacity demand is in the middle range, the heat exchange area with higher wind speed is mainly used for heat exchange. The opening of the electronic expansion valve corresponding to other heat exchange areas can be closed according to the specific capacity demand to reduce the heat exchange capacity of other heat exchange areas. The wind speed required by other heat exchange areas is also reduced accordingly. If any of the other heat exchange areas is installed with a wind grid, in order to increase the air volume in the heat exchange area with higher wind speed, the blade opening angle of the wind grid can be more accurately controlled according to the specific capacity demand.

[0104] Therefore, according to the change in capacity demand and / or the change in the opening of the electronic expansion valve corresponding to the heat exchange zone where the wind grid is installed (i.e., the change in refrigerant flow), the blade opening angle of the wind grid is adjusted to make the wind speed and air volume of the heat exchanger evenly distributed, which can enhance the heat exchange effect of the heat exchange zone and improve its heat exchange performance.

[0105] Specifically, the first angle can be calculated by the following formula: F1=F0×△t1, where F1 represents the first angle, F0=90°, and △t1 represents the first simulation coefficient of the preset heat exchanger air volume distribution. The default value of △t1 can be 0.7. The first simulation coefficient can be determined by experiment, and the value of the first simulation coefficient is a value greater than 0 and less than 1. The value of the first simulation coefficient indicates that the optimization effect of the wind grille on the wind speed is optimal under the corresponding situation.

[0106] Specifically, the second angle may be calculated by the following formula: F2=F0×Qc, wherein F2 represents the second angle, F0=90°, and Qc represents the capacity requirement.

[0107] If the air conditioner is in standby or off state, the blade opening angle of the air grille can be defaulted to 90 degrees or 0 degrees. If the air conditioner has just been turned on, it can be considered that the capacity demand is large at this time, and the blade opening angle of the air grille is controlled to be the first angle.

[0108] (2) If there is only one air grille, the air grille is installed on the air inlet side of the target heat exchange zone, the target heat exchange zone is the heat exchange zone with the lowest wind speed at the same fan frequency among all heat exchange zones when the air grille is not installed, and the refrigerant flow rate of each heat exchange zone of the heat exchanger is controlled by the same electronic expansion valve, and the blade opening angle of the air grille in the air conditioner is controlled, including:

[0109] If the capacity requirement is greater than a third preset threshold, controlling the blade opening angle of the wind grille to be a third angle;

[0110] If the capacity requirement is less than or equal to the third preset threshold, the blade opening angle of the wind grid is controlled to be a fourth angle, wherein the third angle is greater than the fourth angle.

[0111] The third preset threshold can be preset according to the control requirement, for example, set to 50%. The capacity requirement is greater than the third preset threshold.

[0112] Furthermore, the third angle can be calculated by the following formula: F3=F0×△t2, wherein F3 represents the third angle, F0=90°, △t2 represents the second simulation coefficient of the preset heat exchanger air volume distribution, and the default value of △t2 can be 0.85.

[0113] The fourth angle may be calculated by the following formula: F4=F0×Qc, wherein F4 represents the fourth angle, F0=90°, and Qc represents the capacity requirement.

[0114] When the capacity demand is greater than the third preset threshold, that is, when the capacity demand is large, at least two heat exchange zones need to be used efficiently, and the heat exchange zone with high wind speed (the heat exchange zone with high wind speed or the heat exchange zone with low wind speed in this application refers to the result obtained by comparing the wind speeds of each heat exchange zone at the same fan frequency when the wind grille is not installed) can basically meet the heat exchange demand of the heat exchanger. At this time, it is necessary to focus on optimizing the heat exchange zone with low wind speed. When the capacity demand is less than or equal to the third preset threshold, that is, when the capacity demand is low, the fan frequency will also decrease, and the wind speed of the heat exchange zone with low wind speed will decrease significantly. At this time, the blade opening angle of the wind grille of the heat exchange zone with low wind speed can be adjusted according to different fan frequencies, and the capacity demand can directly reflect the operating status of the fan frequency, so the blade opening angle of the wind grille can be more accurately controlled according to the specific capacity demand, and the wind speed of the heat exchange zone with low wind speed is optimized.

[0115] Combined with the aforementioned wind field distribution diagram and its description, the air intake process from the heat exchanger inlet to the fan negative pressure center is shortened through the blade opening angle of the wind grille, thereby increasing the wind speed and the air volume, and the wind grille is more effective in improving the wind speed in areas with low wind speeds. Therefore, the blade opening angle of the wind grille in the heat exchange zone with high wind speed is greater than the blade opening angle of the wind grille in the heat exchange zone with low wind speed, which can better and more effectively improve the problem of uneven distribution of wind speed and air volume in the heat exchanger.

[0116] (3) If the number of air grilles is at least two, and the refrigerant flow rate of each heat exchange zone of the heat exchanger is controlled by the same electronic expansion valve, controlling the opening angle of the blades of the air grilles in the air conditioner includes:

[0117] Controlling the opening angle of the blades of the first air grille to be greater than the opening angle of the blades of the second air grille;

[0118] Among them, the heat exchange area where the first wind grille is installed has a higher wind speed than the heat exchange area where the second wind grille is installed at the same fan frequency when the wind grille is not installed, and the blade opening angle of the same wind grille when the capacity demand is greater than the third preset threshold is greater than the blade opening angle when the capacity demand is less than or equal to the third preset threshold.

[0119] In this case, when the wind grille is not installed, the higher the wind speed of the heat exchange zone at the same fan frequency, the larger the blade opening angle of the corresponding wind grille, and the larger the capacity requirement of the same wind grille, the larger the blade opening angle. Through the above control, the wind speed and air volume of the heat exchanger can be evenly distributed, improving its heat exchange performance.

[0120] (4) If the number of air grilles is at least two, and each heat exchange zone of the heat exchanger is controlled by a corresponding electronic expansion valve to control the refrigerant flow rate, controlling the blade opening angle of the air grille in the air conditioner includes:

[0121] For at least two heat exchange zones where air grilles are installed and the corresponding electronic expansion valves are in an open state, controlling the opening angle of the blades of the first air grille to be greater than the opening angle of the blades of the second air grille;

[0122] For the heat exchange area where the air grid is installed and the corresponding electronic expansion valve is in the closed state, the blade opening angle of the corresponding air grid is controlled to be 0.

[0123] Among them, the heat exchange area where the first wind grid is installed has a higher wind speed than the heat exchange area where the second wind grid is installed at the same fan frequency when the wind grid is not installed, and the larger the opening of the electronic expansion valve corresponding to the same wind grid, the larger the blade opening angle of the wind grid.

[0124] It should be noted that if only one heat exchange zone is suitable for installing a wind grid and the electronic expansion valve is open, the blade opening angle can be controlled according to the steps of situation (1).

[0125] In this case, the corresponding electronic expansion valve is opened and when the wind grid is not installed, the higher the wind speed of the heat exchange zone at the same fan frequency, the larger the blade opening angle of the corresponding wind grid, and the larger the opening degree of the electronic expansion valve corresponding to the same wind grid, the larger the blade opening angle. Through the above control, the wind speed and air volume of the heat exchanger can be evenly distributed, improving its heat exchange performance.

[0126] In the above four cases, the heat exchanger air volume distribution simulation coefficient can be determined by experiment. According to the air conditioner structure and air volume, the heat exchanger air volume distribution simulation coefficient can be adjusted. The simulation coefficient is specifically expressed as a first simulation coefficient and a second simulation coefficient. The simulation coefficient is a value greater than 0 and less than 1. The value of each simulation coefficient indicates that the wind grille has the best optimization effect on wind speed under the corresponding situation.

[0127] The above air volume control method is described below in conjunction with a specific embodiment. However, it is worth noting that this specific embodiment is only for better illustrating the present application and does not constitute an improper limitation on the present application. Explanations of terms that are the same or corresponding to the above embodiment will not be repeated here.

[0128] (1) Heat exchanger with upper and lower layered structure

[0129] The heat exchanger includes an upper heat exchange zone and a lower heat exchange zone. If the refrigerant flow rates of the upper heat exchange zone and the lower heat exchange zone are controlled by their respective corresponding electronic expansion valves, and a wind grid is installed on the air inlet side of the lower heat exchange zone, in this case, the wind speed and air volume distribution of the heat exchanger can be improved by controlling the opening angle of the blades of the wind grid.

[0130] The blade opening angle of the air grille is controlled according to the air conditioning load demand and / or the opening degree of the electronic expansion valve in the lower heat exchange zone. When the air conditioner is running, the air conditioning load demand ratio Qc=Qon / Q is calculated according to the rated capacity value Q of the air conditioner and the cooling or heating capacity value Qon of the indoor unit in operation. The opening degree K of the electronic expansion valve in the lower heat exchange zone can be adjusted according to Qc, K0 is the default maximum opening degree, and the corresponding relationship between Qc and the opening degree K of the electronic expansion valve in the lower heat exchange zone is shown in Table 1 below. In other words, the opening degree of the electronic expansion valve in the lower heat exchange zone can also reflect the capacity demand of the air conditioner.

[0131] When Qc>50%, the electronic expansion valve corresponding to the lower heat exchange zone can be opened to the maximum, and the blade opening angle of the wind grid is F1=F0×△t1, (F0=90°, △t1 is the first simulation coefficient of the preset heat exchanger air volume distribution, the air conditioner structure and air volume are different, △t1 can be adjusted, the default value is 0.7), increase the wind speed in the lower heat exchange zone, and improve the uniformity of the heat exchanger's oncoming wind speed distribution. When the air conditioner is on standby, the blade opening angle of the wind grid is in the default state F0, and when the air conditioner has just been turned on, the blade opening angle of the wind grid is in the default state F1.

[0132] When 30%<Qc≤50%, the opening K of the electronic expansion valve corresponding to the lower heat exchange zone decreases. At this time, the heat exchange capacity of the lower heat exchange zone is also reduced, and the required wind speed is also reduced. In order to increase the air volume in the upper heat exchange zone, the blade opening angle of the wind grid in the lower heat exchange zone is controlled to be F2=F0×Qc.

[0133] When 0<Qc≤30%, only the upper heat exchange zone is in operation, the electronic expansion valve corresponding to the lower heat exchange zone is closed, and the blade opening angle of the wind grid is 0°, that is, the wind grid is closed, and no air volume passes through the lower heat exchange zone, increasing the internal negative pressure of the upper heat exchange zone, increasing the wind speed in the upper heat exchange zone, and enhancing the heat exchange effect of the upper heat exchange zone.

[0134] Table 1 Correspondence between capacity requirement, electronic expansion valve opening, and blade opening angle

[0135] Q 0<Qc≤30% 30%<Qc≤50% Qc>50% K 0 <![CDATA[K0×Qc]]> <![CDATA[K0]]> F 0 <![CDATA[F0×Qc]]> <![CDATA[F0×△t1]]>

[0136] Among them, Qc represents the capacity requirement of the air conditioner, K represents the opening of the electronic expansion valve corresponding to the lower heat exchange area, and F represents the opening angle of the blades of the wind grid.

[0137] (2) Integrated heat exchanger

[0138] The heat exchanger includes an upper heat exchange zone and a lower heat exchange zone. If the refrigerant flow in the upper heat exchange zone and the lower heat exchange zone is controlled by the same electronic expansion valve, a first wind grid is installed on the air inlet side of the upper heat exchanger, and a second wind grid is installed on the air inlet side of the lower heat exchange zone. In this case, the blade opening angle of the first wind grid and the blade opening angle of the second wind grid need to be controlled, and the first wind grid and the second wind grid cooperate to improve the problem of uneven air volume distribution of the integrated heat exchanger.

[0139] When Qc>50%, the blade opening angle of the first wind grid is F0×△t2, and the blade opening angle of the second wind grid is F0×△t3, F0=90°, the default value of △t2 is 0.85, and the default value of △t3 is 0.7.

[0140] When 0<Qc≤50%, the blade opening angle of the first wind grid is F0×△t4, the blade opening angle of the second wind grid is F0×Qc, and the default value of △t4 is 0.7.

[0141] When the capacity demand is greater than the third preset threshold, that is, when the capacity demand is large, both the upper and lower heat exchange areas need to be used efficiently. Since the wind speed in the upper heat exchange area is greater than that in the lower heat exchange area, the upper heat exchange area can basically meet the heat exchange demand of the heat exchanger. At this time, it is necessary to focus on optimizing the wind speed in the lower heat exchange area. When the capacity demand is less than or equal to the third preset threshold, that is, when the capacity demand is low, the fan frequency will also decrease, and the wind speed in the lower heat exchange area will decrease significantly. At this time, it is necessary to focus on optimizing the wind speed in the lower heat exchange area according to the specific capacity demand.

[0142] Combined with the aforementioned wind field distribution diagram and its description, the air intake process from the heat exchanger inlet to the fan negative pressure center is shortened through the blade opening angle of the wind grid, thereby increasing the wind speed and the air volume, and the wind grid is more effective in improving the wind speed in areas with low wind speed. Therefore, controlling the blade opening angle of the first wind grid in the upper heat exchange zone to be greater than the blade opening angle of the second wind grid in the lower heat exchange zone can better and more effectively improve the problem of uneven wind speed and air volume distribution in the heat exchanger.

[0143] This embodiment is based on the structure of the heat exchange equipment described in Example 1. According to the change of air conditioning load or the specific use of the heat exchanger, the blade opening angle of the corresponding wind grid is adjusted to improve the problem of uneven air volume distribution of the heat exchanger and enhance the heat exchange efficiency of the whole or upper heat exchange area.

[0144] Embodiment 4

[0145] Based on the same inventive concept, this embodiment provides an air volume control device, which is applied to the air conditioner described in the above embodiment 2, and the device can be used to implement the air volume control method described in the above embodiment 3. The device can be implemented by software and / or hardware, and the device can generally be integrated into an air conditioner controller.

[0146] Fig.10 is a structural block diagram of the air volume control device provided in the fourth embodiment of the present invention, such as Fig.10 As shown, the device comprises:

[0147] An acquisition module 1001 is used to acquire the capacity requirement of the air conditioner;

[0148] The control module 1002 is used to control the opening angle of the blades of the air grille of the air conditioner according to the capacity requirement.

[0149] Optionally, the control module 1002 includes:

[0150] A first determining unit, used to determine a corresponding control relationship between each heat exchange zone of the heat exchanger and the electronic expansion valve;

[0151] A second determining unit is used to determine the number of wind grilles installed on the heat exchanger;

[0152] A control unit is used to control the blade opening angle of the air grille in the air conditioner according to the corresponding control relationship, the number of the air grilles and the capacity requirement.

[0153] Optionally, if the number of the air grille is one, and each heat exchange zone of the heat exchanger is controlled by a corresponding electronic expansion valve to control the refrigerant flow rate, the control unit includes:

[0154] A first control subunit is configured to control the blade opening angle of the wind grille to be a first angle if the capacity demand is greater than a first preset threshold value and / or the electronic expansion valve corresponding to the heat exchange area where the wind grille is installed is at a maximum opening;

[0155] a second control subunit, configured to control the blade opening angle of the wind grille to be a second angle if the capacity demand is greater than a second preset threshold and less than or equal to the first preset threshold, and / or the opening degree of the electronic expansion valve corresponding to the heat exchange zone where the wind grille is installed is a maximum opening degree multiplied by the capacity demand;

[0156] A third control subunit is configured to control the blade opening angle of the wind grid to be 0 if the capacity demand is less than or equal to the second preset threshold value and / or the electronic expansion valve corresponding to the heat exchange area where the wind grid is installed is closed;

[0157] Wherein, the second angle is smaller than the first angle.

[0158] Optionally, the first control subunit may calculate the first angle by the following formula:

[0159] F1=F0×△t1,

[0160] Wherein, F1 represents the first angle, F0=90°, and Δt1 represents the first simulation coefficient of the preset heat exchanger air volume distribution.

[0161] Optionally, the second control subunit may calculate the second angle by the following formula:

[0162] F2=F0×Qc,

[0163] Among them, F2 represents the second angle, F0=90°, and Qc represents the capacity requirement.

[0164] Optionally, if the number of the air grille is one, and each heat exchange zone of the heat exchanger is controlled by the same electronic expansion valve to control the refrigerant flow, the control unit includes:

[0165] a fourth control subunit, configured to control the blade opening angle of the wind grid to be a third angle if the capacity requirement is greater than a third preset threshold;

[0166] The fifth control subunit is used to control the blade opening angle of the wind grid to be a fourth angle if the capacity requirement is less than or equal to the third preset threshold, wherein the third angle is greater than the fourth angle.

[0167] Optionally, the fourth control subunit may calculate the third angle by the following formula:

[0168] F3=F0×△t2,

[0169] Wherein, F3 represents the third angle, F0=90°, and Δt2 represents the second simulation coefficient of the preset heat exchanger air volume distribution.

[0170] Optionally, the fifth control subunit may calculate the fourth angle by the following formula:

[0171] F4=F0×Qc,

[0172] Wherein, F4 represents the fourth angle, F0=90°, and Qc represents the capacity requirement.

[0173] Optionally, if the number of the air grilles is at least two, and each heat exchange zone of the heat exchanger is controlled by the same electronic expansion valve to control the refrigerant flow, the control unit includes:

[0174] A sixth control subunit, configured to control the blade opening angle of the first air grille to be greater than the blade opening angle of the second air grille;

[0175] Among them, the heat exchange area where the first wind grille is installed has a higher wind speed than the heat exchange area where the second wind grille is installed at the same fan frequency when the wind grille is not installed, and the blade opening angle of the same wind grille when the capacity demand is greater than the third preset threshold is greater than the blade opening angle when the capacity demand is less than or equal to the third preset threshold.

[0176] Optionally, if the number of the air grilles is at least two, and each heat exchange zone of the heat exchanger is controlled by a corresponding electronic expansion valve to control the refrigerant flow rate, the control unit includes:

[0177] a seventh control subunit, for controlling the blade opening angle of the first wind grid to be greater than the blade opening angle of the second wind grid for at least two heat exchange zones where wind grids are installed and the corresponding electronic expansion valves are in an open state;

[0178] Wherein, the heat exchange area where the first wind grid is installed has a higher wind speed at the same fan frequency than the heat exchange area where the second wind grid is installed when the wind grid is not installed, and the larger the opening of the electronic expansion valve corresponding to the same wind grid, the larger the opening angle of the blades of the wind grid;

[0179] The eighth control subunit is used to control the blade opening angle of the corresponding air grid to be 0 for the heat exchange area where the air grid is installed and the corresponding electronic expansion valve is in the closed state.

[0180] The above device can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not described in detail in this embodiment, please refer to the method provided by the embodiment of the present invention.

[0181] Embodiment 5

[0182] This embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the air volume control method as described in the third embodiment above is implemented.

[0183] Embodiment 6

[0184] This embodiment provides an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can implement the air volume control method as described in the above-mentioned embodiment three.

[0185] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0186] It should be noted that the terms "first", "second", etc. in the specification, claims and drawings of the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0187] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0188] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0189] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat exchange device, characterized in that: include: a heat exchanger and at least one wind grille; The heat exchanger comprises at least two heat exchange zones, the at least one wind grille is respectively installed on the air inlet side of at least one of the at least two heat exchange zones, and the blade opening angle of the wind grille is adjustable; The heat exchange device is applied to an air conditioner, and the control device of the air conditioner is used to: obtain the capacity requirement of the air conditioner; Controlling the blade opening angle of the air grille of the air conditioner according to the capacity requirement; Controlling the blade opening angle of the air grille in the air conditioner according to the capacity requirement includes: determining the corresponding control relationship between each heat exchange zone of the heat exchanger and the electronic expansion valve; determining the number of air grilles installed on the heat exchanger; and controlling the blade opening angle of the air grille in the air conditioner according to the corresponding control relationship, the number of air grilles and the capacity requirement; If the number of the wind grilles is one, and each heat exchange zone of the heat exchanger is respectively controlled by a corresponding electronic expansion valve with a respective refrigerant flow rate, controlling the blade opening angle of the wind grille in the air conditioner includes: if the capacity demand is greater than a first preset threshold value, and / or the electronic expansion valve corresponding to the heat exchange zone where the wind grille is installed is at the maximum opening, then controlling the blade opening angle of the wind grille to be a first angle; if the capacity demand is greater than a second preset threshold value and less than or equal to the first preset threshold value, and / or the opening of the electronic expansion valve corresponding to the heat exchange zone where the wind grille is installed is the maximum opening multiplied by the capacity demand, then controlling the blade opening angle of the wind grille to be a second angle; if the capacity demand is less than or equal to the second preset threshold value, and / or the electronic expansion valve corresponding to the heat exchange zone where the wind grille is installed is closed, then controlling the blade opening angle of the wind grille to be 0; wherein the second angle is less than the first angle; If the number of the air grille is one, and the refrigerant flow rate of each heat exchange zone of the heat exchanger is controlled by the same electronic expansion valve, controlling the blade opening angle of the air grille in the air conditioner includes: if the capacity demand is greater than a third preset threshold, controlling the blade opening angle of the air grille to be a third angle; if the capacity demand is less than or equal to the third preset threshold, controlling the blade opening angle of the air grille to be a fourth angle, wherein the third angle is greater than the fourth angle; If the number of the air grilles is at least two, and the refrigerant flow rate of each heat exchange zone of the heat exchanger is controlled by the same electronic expansion valve, controlling the blade opening angle of the air grille in the air conditioner includes: controlling the blade opening angle of the first air grille to be greater than the blade opening angle of the second air grille; wherein the heat exchange zone where the first air grille is installed has a higher wind speed than the heat exchange zone where the second air grille is installed at the same fan frequency when the air grille is not installed, and the blade opening angle of the same air grille when the capacity demand is greater than a third preset threshold is greater than the blade opening angle when the capacity demand is less than or equal to the third preset threshold; If the number of the wind grilles is at least two, and each heat exchange zone of the heat exchanger has its own refrigerant flow controlled by its own corresponding electronic expansion valve, controlling the blade opening angle of the wind grille in the air conditioner includes: for at least two heat exchange zones where wind grilles are installed and the corresponding electronic expansion valves are in an open state, controlling the blade opening angle of the first wind grille to be greater than the blade opening angle of the second wind grille; wherein the heat exchange zone where the first wind grille is installed has a higher wind speed than the heat exchange zone where the second wind grille is installed at the same fan frequency when the wind grille is not installed, and the larger the opening degree of the electronic expansion valve corresponding to the same wind grille, the larger the blade opening angle of the wind grille; for the heat exchange zone where the wind grille is installed and the corresponding electronic expansion valve is in a closed state, controlling the blade opening angle of the corresponding wind grille to be 0.

2. The heat exchange device according to claim 1, characterized in that: The wind grille comprises: Wind grille frame; At least two blades are arranged in sequence in the wind grid frame; The blade rotating mechanism is installed on the wind grid frame and connected with the at least two blades.

3. The heat exchange device according to claim 2, characterized in that: The wind grid frame has a first side and a second side opposite to each other, one end of each of the blades is connected to the first side, and the other end is connected to the second side.

4. The heat exchange device according to claim 2, characterized in that: The blade rotating mechanism comprises: at least two rotating shafts, a motor and a transmission component; The at least two rotating shafts correspond to the at least two blades one by one, respectively, and the blades are installed in the wind grid frame through the corresponding rotating shafts; Each of the rotating shafts comprises a first end and a second end, and the transmission component is sleeved on the first ends of all the rotating shafts; The motor is arranged on the first end of the designated rotating shaft, and the motor drives the blades to rotate through the transmission component and the at least two rotating shafts.

5. The heat exchange device according to claim 2, characterized in that: The wind fence also includes: At least one support bar is installed in the wind grid frame, each of the support bars is provided with at least two through holes, the at least two through holes correspond to the positions of the at least two blades one by one, and each blade passes through the through holes at corresponding positions on all the support bars.

6. The heat exchange device according to claim 1, characterized in that: If only one wind grille is installed, the wind grille is installed on the air inlet side of the target heat exchange zone, and the target heat exchange zone is the heat exchange zone with the lowest wind speed at the same fan frequency among all heat exchange zones when the wind grille is not installed.

7. The heat exchange device according to claim 1, characterized in that: The opening angle of the blades of the wind grid ranges from 0 degrees to 90 degrees.

8. The heat exchange device according to any one of claims 1 to 7, characterized in that: The heat exchange device further includes: a fan, which is disposed above the heat exchanger and generates negative pressure at the heat exchanger.

9. An air conditioner, characterized in that: include: The heat exchange device according to any one of claims 1 to 8.

10. The air conditioner according to claim 9, characterized in that: The heat exchange device is located in the outdoor unit.

11. A method for controlling air volume, characterized in that: Applied to the air conditioner according to claim 9 or 10, the method comprises: obtaining a capacity requirement of the air conditioner; Controlling the blade opening angle of the air grille of the air conditioner according to the capacity requirement; Controlling the blade opening angle of the air grille of the air conditioner according to the capacity requirement includes: Determine the corresponding control relationship between each heat exchange zone of the heat exchanger and the electronic expansion valve; Determining the number of wind grilles installed on the heat exchanger; Controlling the blade opening angle of the air grille in the air conditioner according to the corresponding control relationship, the number of the air grilles and the capacity requirement; If the number of the wind grilles is one, and each heat exchange zone of the heat exchanger is respectively controlled by a corresponding electronic expansion valve with a respective refrigerant flow rate, controlling the blade opening angle of the wind grille in the air conditioner includes: if the capacity demand is greater than a first preset threshold value, and / or the electronic expansion valve corresponding to the heat exchange zone where the wind grille is installed is at the maximum opening, then controlling the blade opening angle of the wind grille to be a first angle; if the capacity demand is greater than a second preset threshold value and less than or equal to the first preset threshold value, and / or the opening of the electronic expansion valve corresponding to the heat exchange zone where the wind grille is installed is the maximum opening multiplied by the capacity demand, then controlling the blade opening angle of the wind grille to be a second angle; if the capacity demand is less than or equal to the second preset threshold value, and / or the electronic expansion valve corresponding to the heat exchange zone where the wind grille is installed is closed, then controlling the blade opening angle of the wind grille to be 0; wherein the second angle is less than the first angle; If the number of the air grille is one, and the refrigerant flow rate of each heat exchange zone of the heat exchanger is controlled by the same electronic expansion valve, controlling the blade opening angle of the air grille in the air conditioner includes: if the capacity demand is greater than a third preset threshold, controlling the blade opening angle of the air grille to be a third angle; if the capacity demand is less than or equal to the third preset threshold, controlling the blade opening angle of the air grille to be a fourth angle, wherein the third angle is greater than the fourth angle; If the number of the air grilles is at least two, and the refrigerant flow rate of each heat exchange zone of the heat exchanger is controlled by the same electronic expansion valve, controlling the blade opening angle of the air grille in the air conditioner includes: controlling the blade opening angle of the first air grille to be greater than the blade opening angle of the second air grille; wherein the heat exchange zone where the first air grille is installed has a higher wind speed than the heat exchange zone where the second air grille is installed at the same fan frequency when the air grille is not installed, and the blade opening angle of the same air grille when the capacity demand is greater than a third preset threshold is greater than the blade opening angle when the capacity demand is less than or equal to the third preset threshold; If the number of the wind grilles is at least two, and each heat exchange zone of the heat exchanger has its own refrigerant flow controlled by its own corresponding electronic expansion valve, controlling the blade opening angle of the wind grille in the air conditioner includes: for at least two heat exchange zones where wind grilles are installed and the corresponding electronic expansion valves are in an open state, controlling the blade opening angle of the first wind grille to be greater than the blade opening angle of the second wind grille; wherein the heat exchange zone where the first wind grille is installed has a higher wind speed than the heat exchange zone where the second wind grille is installed at the same fan frequency when the wind grille is not installed, and the larger the opening degree of the electronic expansion valve corresponding to the same wind grille, the larger the blade opening angle of the wind grille; for the heat exchange zone where the wind grille is installed and the corresponding electronic expansion valve is in a closed state, controlling the blade opening angle of the corresponding wind grille to be 0.

12. The method according to claim 11, characterized in that The first angle is calculated by the following formula: F1=F0×△t1, Wherein, F1 represents the first angle, F0=90°, and Δt1 represents the first simulation coefficient of the preset heat exchanger air volume distribution.

13. The method according to claim 11, characterized in that The second angle is calculated by the following formula: F2=F0×Qc, Among them, F2 represents the second angle, F0=90°, and Qc represents the capacity requirement.

14. The method according to claim 11, characterized in that The third angle is calculated by the following formula: F3=F0×△t2, Wherein, F3 represents the third angle, F0=90°, and Δt2 represents the second simulation coefficient of the preset heat exchanger air volume distribution.

15. The method according to claim 11, characterized in that The fourth angle is calculated by the following formula: F4=F0×Qc, Wherein, F4 represents the fourth angle, F0=90°, and Qc represents the capacity requirement.

16. An air volume control device, characterized in that: Applicable to the air conditioner according to claim 9 or 10, the device comprises: An acquisition module, used for acquiring the capacity requirement of the air conditioner; A control module, used for controlling the opening angle of the blades of the air grille of the air conditioner according to the capacity requirement; The control module comprises: A first determining unit, used to determine a corresponding control relationship between each heat exchange zone of the heat exchanger and the electronic expansion valve; A second determining unit is used to determine the number of wind grilles installed on the heat exchanger; A control unit, configured to control the opening angle of the blades of the air grille in the air conditioner according to the corresponding control relationship, the number of the air grilles and the capacity requirement; If the number of the air grille is one, and each heat exchange zone of the heat exchanger is controlled by a corresponding electronic expansion valve to control the refrigerant flow rate, the control unit includes: A first control subunit is configured to control the blade opening angle of the wind grille to be a first angle if the capacity demand is greater than a first preset threshold value and / or the electronic expansion valve corresponding to the heat exchange area where the wind grille is installed is at a maximum opening; a second control subunit, configured to control the blade opening angle of the wind grille to be a second angle if the capacity demand is greater than a second preset threshold and less than or equal to the first preset threshold, and / or the opening degree of the electronic expansion valve corresponding to the heat exchange zone where the wind grille is installed is a maximum opening degree multiplied by the capacity demand; A third control subunit is configured to control the blade opening angle of the wind grille to be 0 if the capacity demand is less than or equal to the second preset threshold value and / or the electronic expansion valve corresponding to the heat exchange area where the wind grille is installed is closed; wherein the second angle is smaller than the first angle; If the number of the air grille is one, and each heat exchange zone of the heat exchanger is controlled by the same electronic expansion valve to control the refrigerant flow, the control unit includes: a fourth control subunit, configured to control the blade opening angle of the wind grid to be a third angle if the capacity requirement is greater than a third preset threshold; a fifth control subunit, configured to control the blade opening angle of the wind grid to be a fourth angle if the capacity requirement is less than or equal to the third preset threshold, wherein the third angle is greater than the fourth angle; If the number of the air grilles is at least two, and the refrigerant flow rate of each heat exchange zone of the heat exchanger is controlled by the same electronic expansion valve, the control unit includes: a sixth control subunit, configured to control the blade opening angle of the first wind grille to be greater than the blade opening angle of the second wind grille; wherein the heat exchange area where the first wind grille is installed has a higher wind speed than the heat exchange area where the second wind grille is installed at the same fan frequency when the wind grille is not installed, and the blade opening angle of the same wind grille when the capacity demand is greater than a third preset threshold is greater than the blade opening angle when the capacity demand is less than or equal to the third preset threshold; If the number of the air grilles is at least two, and each heat exchange zone of the heat exchanger is controlled by a corresponding electronic expansion valve to control the refrigerant flow rate, the control unit includes: a seventh control subunit, for controlling the blade opening angle of the first wind grille to be greater than the blade opening angle of the second wind grille for at least two heat exchange zones where wind grilles are installed and the corresponding electronic expansion valves are in an open state; wherein the heat exchange zone where the first wind grille is installed has a higher wind speed than the heat exchange zone where the second wind grille is installed at the same fan frequency when the wind grille is not installed, and the larger the opening degree of the electronic expansion valve corresponding to the same wind grille, the larger the blade opening angle of the wind grille; The eighth control subunit is used to control the blade opening angle of the corresponding air grid to be 0 for the heat exchange area where the air grid is installed and the corresponding electronic expansion valve is in the closed state.

17. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the air volume control method according to any one of claims 11 to 15 is implemented.

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