Air conditioner outdoor unit, air conditioner and control method of air conditioner outdoor unit

Abstract

The invention provides an air conditioner outdoor unit, an air conditioner and a control method of the air conditioner outdoor unit, the air conditioner outdoor unit comprises a heat exchanger and a fan device, and the fan device is used for driving airflow to flow through the heat exchanger; the heat exchanger is provided with a first side and a second side which are opposite. The air conditioner outdoor unit has at least two states, in the first state, the fan device drives airflow to flow through the heat exchanger from the first side to the second side, so that the first side is a windward side, and the second side is a leeward side; and in the second state, the fan device drives the airflow to flow through the heat exchanger from the second side to the first side, so that the second side is a windward side, and the first side is a leeward side. According to the technical scheme, when one side of the heat exchanger serves as the windward side and is seriously frosted, the operation state of the outdoor unit of the air conditioner can be switched, the other side of the heat exchanger serves as the windward side, in this way, the heating time of the air conditioner can be prolonged, even continuous heating of the air conditioner can be achieved, and therefore the shutdown defrosting frequency of the air conditioner is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioning, and in particular relates to an air conditioning outdoor unit, an air conditioner and a control method for the air conditioning outdoor unit. Background Art

[0002] During the air conditioning heating process, the outdoor unit will absorb heat from the outside, causing the temperature around the outdoor unit heat exchanger to drop. The water vapor in the outdoor air condenses into frost on the colder surface of the heat exchanger. The frost layer will reduce the heat exchange capacity of the outdoor unit, thus affecting the air conditioning heating effect. During the frosting process, the wind field on the windward and leeward sides of the heat exchanger is uneven, and the wind volume on the windward side is higher than the wind volume on the leeward side, resulting in faster frost on the windward side. Therefore, frequent shutdowns are required for defrosting, affecting user comfort. Summary of the invention

[0003] Therefore, the present invention provides an air-conditioning outdoor unit, an air conditioner and a control method for the air-conditioning outdoor unit, which can solve the technical problem in the prior art that the air conditioner needs to be frequently shut down for defrosting.

[0004] In order to solve the above problems, the present invention provides an air conditioner outdoor unit, comprising a heat exchanger and a fan device, wherein the fan device is used to drive airflow to flow through the heat exchanger to perform heat exchange with the heat exchanger;

[0005] The heat exchanger has a first side and a second side opposite to each other;

[0006] The air conditioner outdoor unit has at least two states, wherein, in a first state, the fan device drives the airflow to flow through the heat exchanger from the first side to the second side, so that the first side is the windward side and the second side is the leeward side; in a second state, the fan device drives the airflow to flow through the heat exchanger from the second side to the first side, so that the second side is the windward side and the first side is the leeward side.

[0007] In some embodiments, the fan device includes a first fan and a second fan, wherein the first fan is used to drive the airflow from the first side to the second side through the heat exchanger when started; and the second fan is used to drive the airflow from the second side to the first side through the heat exchanger when started;

[0008] Wherein, in the first state, the first fan is started and the second fan is turned off; in the second state, the first fan is turned off and the second fan is started.

[0009] In some embodiments, the air conditioner outdoor unit further includes an air passage;

[0010] The heat exchanger is located in the air passage and divides the air passage into a first air passage section and a second air passage section, wherein the first air passage section and the second air passage section are arranged in sequence along the air flow direction of the air passage; wherein the first side is located in the first air passage section, and the second side is located in the second air passage section.

[0011] In some embodiments, the first air duct section has a first air outlet and a first air inlet, the first air inlet and the first air outlet are located on different sides of the first air duct section, and the first fan is used to draw air from the first air outlet and the first air inlet.

[0012] In some embodiments, the first air outlet is opposite to the first side, and the first fan is an axial flow fan disposed at the first air outlet.

[0013] In some embodiments, the second air duct section has a second air outlet and a second air inlet, the second air inlet and the second air outlet are located on different sides of the second air duct section, and the second fan is used to draw air from the second air outlet and the second air inlet.

[0014] In some embodiments, the second air outlet is opposite to the second side, and the second fan is an axial flow fan disposed at the second air outlet.

[0015] In some embodiments, when the first air duct segment has a first air outlet and a first air inlet, and the first air inlet and the first air outlet are located on different sides of the first air duct segment, and the first fan is used to draw air from the first air outlet and the first air inlet,

[0016] The first air inlet and the second air inlet are located on the same side of the air conditioner outdoor unit, and both the first air inlet and the second air inlet can be opened and closed; in the first state, the first air inlet is open and the second air inlet is closed; in the second state, the first air inlet is closed and the second air inlet is open.

[0017] In some embodiments, the air conditioner outdoor unit also includes a driving mechanism and a movable baffle, the driving mechanism is used to drive the movable baffle to move to a first position in the first state, and drive the movable baffle to move to a second position in the second state; wherein, in the first position, the movable baffle blocks the second air inlet and opens the first air inlet; in the second position, the movable baffle blocks the first air inlet and opens the second air inlet.

[0018] In some embodiments, the driving mechanism includes a power device and a gear, the movable baffle is provided with a transmission tooth, the gear is meshed with the transmission tooth, and the driving mechanism drives the gear to rotate through the power device, so that the gear drives the movable baffle to move to the first position or the second position through the transmission tooth.

[0019] In some embodiments, the air conditioner outdoor unit further comprises a casing, the casing comprising a first side panel, a second side panel, a third side panel, a fourth side panel, a top panel and a bottom panel; the first side panel, the second side panel, the third side panel and the fourth side panel are sequentially connected end to end to form a cylindrical structure with openings at both ends, the top panel covers the upper opening of the cylindrical structure, and the bottom panel covers the lower opening of the cylindrical structure;

[0020] The air conditioner outdoor unit also includes a partition plate, which is arranged in the casing, and the partition plate is abutted against the top plate, the second side plate, the bottom plate and the fourth side plate in the circumferential direction in sequence, and the space enclosed by the partition plate, the top plate, the first side plate and the bottom plate forms the air passage, one end of the air passage is opened on the second side plate, and the other end of the air passage is opened on the fourth side plate.

[0021] An embodiment of the present invention further provides an air conditioner, comprising any one of the air conditioner outdoor units described above.

[0022] An embodiment of the present invention further provides a method for controlling an outdoor unit of an air conditioner, comprising:

[0023] The air conditioner outdoor unit operates in the heating mode of the air conditioner;

[0024] When the air-conditioning outdoor unit is running in the first state, the current I1 of the first fan is detected to determine whether I1 is greater than the first preset value. If I1 is less than or equal to the first preset value, the air-conditioning outdoor unit is kept running in the first state; if I1 is greater than the first preset value, the surface temperature T2 of the second side is monitored; when T2 ≥ the ambient dew point temperature and is maintained for more than the first preset time, the air-conditioning outdoor unit is switched to the second state for operation; if T2 is less than the ambient dew point temperature, both the first fan and the second fan are turned off, and the air-conditioning outdoor unit is controlled to enter the defrosting mode; wherein 1.1Ie1<first preset value≤1.2Ie1, Ie1 is the current of the first fan when the heat exchanger is not frosted;

[0025] When the air-conditioning outdoor unit is operating in the second state, the current I2 of the second fan is detected to determine whether I2 is greater than the second preset value. If I2 is less than or equal to the second preset value, the air-conditioning outdoor unit is kept operating in the second state; if I2 is greater than the second preset value, the surface temperature T1 of the first side is monitored; when T1≥the ambient dew point temperature and is maintained for more than the second preset time, the air-conditioning outdoor unit is switched to the first state for operation; if T1 is less than the ambient dew point temperature, the first fan and the second fan are both turned off, and the air-conditioning outdoor unit is controlled to enter the defrost mode; wherein, 1.1Ie2<the second preset value≤1.2Ie2, and Ie2 is the current of the second fan when the heat exchanger is not frosted.

[0026] In some embodiments, when the air conditioner outdoor unit is in the defrost mode, the surface temperature T1 of the first side and the surface temperature T2 of the second side are monitored simultaneously. When T1≥ambient dew point temperature and T2≥ambient dew point temperature within a third preset time period, the air conditioner outdoor unit is controlled to end the defrost mode.

[0027] The present invention provides an air conditioner outdoor unit, an air conditioner and a control method for the air conditioner outdoor unit.

[0028] Beneficial effects:

[0029] 1. Compared with the solution in the prior art that one side of the heat exchanger is always the windward side, when the side of the heat exchanger is severely frosted, the air conditioner needs to be stopped for defrosting. However, the present invention makes the two sides of the heat exchanger alternately become the windward side. When one side of the heat exchanger is severely frosted as the windward side, the operating state of the air conditioner outdoor unit can be switched to make the other side of the heat exchanger used as the windward side. In this way, the heating time of the air conditioner can be extended, and even continuous heating of the air conditioner can be achieved, thereby reducing the frequency of air conditioner shutdown for defrosting.

[0030] 2. When the air conditioner is heating, the present invention makes the two sides of the heat exchanger alternately become the windward side, so that the frost on both sides of the heat exchanger can be more uniform, and the defrosting efficiency in the subsequent defrosting process can be improved.

[0031] 3. By arranging air outlets on different sides of the first air duct section and the second air duct section, the air intake area of ​​the air conditioner outdoor unit can be increased when operating in the first state and the second state, thereby increasing the air intake volume and improving the heat exchange efficiency.

[0032] 4. The present invention can avoid interference between air inlet and air outlet on the same side by closing the other when one of the first air inlet and the second air inlet is opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0034] Figure 1 It is a partial structural schematic diagram of an air-conditioning outdoor unit of the present invention;

[0035] Figure 2 yes Figure 1 The enlarged schematic diagram of point A in the middle;

[0036] Figure 3 is a partially exploded schematic diagram of an air conditioner outdoor unit of the present invention;

[0037] Figure 4 is a schematic structural diagram of an air-conditioning outdoor unit of the present invention in a first state;

[0038] Figure 5 is a schematic structural diagram of the air-conditioning outdoor unit of the present invention in the second state;

[0039] Figure 6 It is a logic block diagram of the control method of the air conditioner outdoor unit of the present invention.

[0040] The accompanying drawings are marked as follows:

[0041] 1. Air duct; 2. Heat exchanger; 3. Partition plate; 4. Motor; 5. Gear; 6. Transmission gear; 7. Second air inlet; 8. Movable baffle; 10. First air inlet; 11. First air duct section; 12. Second air duct section; 13. First chamber; 14. First side panel; 15. Second side panel; 16. Third side panel; 17. Fourth side panel; 18. Bottom panel; 19. First fan; 20. Second fan; 21. First side; 22. Second side; 101. First air outlet; 102. Second air outlet. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0043] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0044] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0045] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0046] See also Figure 1-5 As shown, according to an embodiment of the present invention, an air conditioner outdoor unit is provided, comprising a heat exchanger 2 and a fan device. The fan device is used to drive airflow through the heat exchanger 2 to perform heat exchange with the heat exchanger 2. The heat exchanger 2 has a first side 21 and a second side 22 opposite to each other.

[0047] The aforementioned air conditioner outdoor unit has at least two states, wherein: Figure 4 As shown, in the first state, the fan device drives the airflow from the first side 21 to the second side 22 through the heat exchanger 2, so that the first side 21 is the windward side and the second side 22 is the leeward side. Figure 5 As shown, in the second state, the fan device drives the airflow to flow through the heat exchanger 2 from the second side 22 to the first side 21, so that the second side 22 is the windward side and the first side 21 is the leeward side.

[0048] In the above example, when the air conditioner is running in the heating mode, if the external ambient temperature is low and the heat exchanger 2 is frosted, the air conditioner outdoor unit can be switched between the first state and the second state to alternately operate, so that the two sides of the heat exchanger 2 are alternately the windward side. The windward side airflow constantly contacts the heat exchanger 2, and the degree of frost on the windward side is more serious. The leeward side has less airflow, a lower degree of frost, or even no frost.

[0049] Compared with the solution in the prior art that one side of the heat exchanger is always the windward side, when the side of the heat exchanger is severely frosted, the air conditioner needs to be shut down for defrosting. The present invention makes the two sides of the heat exchanger 2 alternately become the windward side. When one side of the heat exchanger 2 is severely frosted as the windward side, the operating state of the air conditioner outdoor unit can be switched to make the other side of the heat exchanger 2 used as the windward side. In this way, the heating time of the air conditioner can be extended, and even continuous heating of the air conditioner can be achieved, thereby reducing the frequency of air conditioner shutdown for defrosting.

[0050] In addition, when the air conditioner is heating, the present invention can make the frost on both sides of the heat exchanger 2 more uniform by making the two sides of the heat exchanger 2 alternately become the windward side, and the defrosting efficiency in the subsequent defrosting process can be improved.

[0051] For ease of understanding, the following is a specific description of how the airflow flows through the heat exchanger 2. Among them, the airflow generally flows through the heat exchanger 2 by passing through the heat exchanger 2. Specifically, the heat exchanger 2 has an airflow heat exchange channel that runs from the first side 21 to the second side 22, and the fan device is used to drive the airflow to flow through the airflow heat exchange channel. When the airflow flows through the airflow heat exchange channel, it exchanges heat with the heat exchanger 2. In some embodiments, the above-mentioned heat exchanger 2 may have a meandering heat exchange tube, and the meandering heat exchange tube has more than two heat exchange tube sections arranged in parallel and spaced sequence, wherein the gap between two adjacent heat exchange tube sections forms the above-mentioned airflow heat exchange channel. In other embodiments, the above-mentioned heat exchanger 2 may be a microchannel heat exchanger, and the microchannel heat exchanger 2 has more than two flat tubes arranged in parallel and spaced sequence. Among them, the gap between two adjacent flat tubes forms the above-mentioned airflow heat exchange channel.

[0052] In order to realize the function of the above-mentioned fan device, the fan device drives the airflow from the first side 21 to the second side 22 through the heat exchanger 2 in the first state, and drives the airflow from the second side 22 to the first side 21 through the heat exchanger 2 in the second state. In some embodiments, as Figure 3 As shown, the aforementioned fan device may include a first fan 19 and a second fan 20. The first fan 19 is used to drive the airflow from the first side 21 to the second side 22 through the heat exchanger 2 when started. The second fan 20 is used to drive the airflow from the second side 22 to the first side 21 through the heat exchanger 2 when started. In the first state, the first fan 19 is started and the second fan 20 is turned off. In the second state, the first fan 19 is turned off and the second fan 20 is started.

[0053] In the above example, the first fan 19 and the second fan 20 cooperate with each other to realize the function of the aforementioned fan device, so that the windward side and the leeward side of the heat exchanger 2 are switched.

[0054] The types of the first fan 19 and the second fan 20 may be selected according to the requirements. In some embodiments, the first fan 19 and the second fan 20 may both be axial flow fans.

[0055] In some embodiments, Figure 1 As shown, the aforementioned air conditioner outdoor unit may further include an air passage 1. The aforementioned heat exchanger 2 is located in the air passage 1, and divides the air passage 1 into a first air passage section 11 and a second air passage section 12. The first air passage section 11 and the second air passage section 12 are arranged in sequence along the air flow direction of the air passage 1. Among them, the first side 21 of the heat exchanger 2 is located in the first air passage section 11, and the second side 22 of the heat exchanger 2 is located in the second air passage section 12.

[0056] In the above example, the fan device is used to drive the airflow to flow along the air passage 1, and the heat exchanger 2 is located in the air passage 1. When the airflow in the air passage 1 flows through the heat exchanger 2, it can exchange heat with the heat exchanger 2. Among them, the air passage 1 has the effect of gathering wind, which can improve the heat exchange efficiency between the airflow and the heat exchanger 2. The heat exchanger 2 can be sealed with the side wall of the air passage 1 along the circumferential direction to prevent air leakage, further improving the heat exchange efficiency between the airflow and the heat exchanger 2.

[0057] In some embodiments, Figure 4 As shown, the aforementioned first air duct section 11 may have a first air port 101 and a first air inlet 10. The first air inlet 10 and the first air port 101 are located on different sides of the first air duct section 11. The first fan 19 is used to draw air from the first air port 101 and the first air inlet 10.

[0058] In the above example, by setting air outlets on different sides of the first air duct section 11, the air intake area of ​​the air conditioner outdoor unit when operating in the first state can be increased, the air intake volume is increased, and the heat exchange efficiency is improved.

[0059] In a specific application example, Figure 3 As shown, the aforementioned first air outlet 101 is opposite to the first side 21 of the heat exchanger 2. The aforementioned first fan 19 is an axial flow fan arranged at the first air outlet 101.

[0060] The first fan 19 is located in the first air duct section 11, so the first air duct section 11 may also be referred to as a first fan chamber. A first grille may be provided at the first air outlet 101.

[0061] In the above example, when the first fan 19 is started, the first fan 19 draws air from both the first air port 101 and the first air inlet 10, wherein the first air port 101 is a main air inlet and the first air inlet 10 is an auxiliary air inlet. The first fan 19 blows the introduced air toward the first side 21 of the heat exchanger 2 to drive the airflow to flow through the heat exchanger 2 from the first side 21 to the second side 22.

[0062] In some embodiments, Figure 5 As shown, the aforementioned second air duct section 12 may have a second air port 102 and a second air inlet 7. The second air inlet 7 and the second air port 102 are located on different sides of the second air duct section 12. The second fan 20 is used to draw air from the second air port 102 and the second air inlet 7.

[0063] In the above example, by setting air outlets on different sides of the second air duct section 12, the air intake area of ​​the air conditioner outdoor unit when operating in the second state can be increased, the air intake volume is increased, and the heat exchange efficiency is improved.

[0064] In a specific application example, the second air outlet 102 is opposite to the second side 22 of the heat exchanger 2. The second fan 20 is an axial fan disposed at the second air outlet 102. A second grille may be disposed at the second air outlet 102.

[0065] The second fan 20 is located in the second air duct section 12, so the second air duct section 12 may sometimes be referred to as a second fan chamber.

[0066] In the above example, when the second fan 20 is started, the second fan 20 draws air from both the second air port 102 and the second air inlet 7, wherein the second air port 102 is the main air inlet and the second air inlet 7 is the auxiliary air inlet. The second fan 20 blows the introduced air toward the second side 22 of the heat exchanger 2 to drive the airflow to flow through the heat exchanger 2 from the second side 22 to the first side 21.

[0067] In some embodiments, Figure 4 and Figure 5 As shown, when the aforementioned first air duct section 11 has a first air port 101 and a first air inlet 10, and the first air inlet 10 and the first air port 101 are located on different sides of the first air duct section 11, and the first fan 19 is used to draw air from the first air port 101 and the first air inlet 10, the aforementioned first air inlet 10 and the second air inlet 7 are located on the same side of the air conditioner outdoor unit. The first air inlet 10 and the second air inlet 7 can both be opened and closed. In the first state, as Figure 4 As shown, the first air inlet 10 is open and the second air inlet 7 is closed. In the second state, as shown in FIG. Figure 5 As shown, the first air inlet 10 is closed, and the second air inlet 7 is opened.

[0068] In the above example, if the first air inlet 10 and the second air inlet 7 are both opened at the same time, when the air conditioner outdoor unit is operating in the first state or the second state, one of the first air inlet 10 and the second air inlet 7 takes in air, while the other one discharges air. Since the first air inlet 10 and the second air inlet 7 are located on the same side of the air conditioner outdoor unit, when one of the first air inlet 10 and the second air inlet 7 takes in air and the other one discharges air, the air intake and the air discharge will interfere with each other, and the discharged air will be directly introduced into the air inlet, which will affect the heat exchange efficiency of the heat exchanger 2. The present invention can avoid the above situation by closing the other one when one of the first air inlet 10 and the second air inlet 7 is opened, thereby avoiding interference between the air intake and the air discharge on the same side.

[0069] It should be noted here that: when the air conditioner outdoor unit is in the first state, Figure 4 As shown, the first fan 19 is turned on, and the second fan 20 is turned off, the first air inlet 10 is opened, and the second air inlet 7 is closed. At this time, the air passage 1 takes in air from the first air inlet 10 and the first air outlet 101, and the air passes through the first air duct section 11 and the heat exchanger 2 and then enters the second air duct section 12, and then flows out from the second air outlet 102. At this time, the second air outlet 102 is used as an air outlet. When the air conditioner outdoor unit is in the second state, as shown in FIG. Figure 5 As shown, the second fan 20 is turned on, and the first fan 19 is turned off, the second air inlet 7 is opened, and the first air inlet 10 is closed. At this time, the air passage 1 takes in air from the second air inlet 7 and the second air outlet 102. The air passes through the second air duct section 12 and the heat exchanger 2 and then enters the first air duct section 11, and then flows out from the first air outlet 101. At this time, the first air outlet 101 is used as an air outlet.

[0070] In order to achieve the above-mentioned effect that when one of the first air inlet 10 and the second air inlet 7 is opened, the other is closed, in some embodiments, as Figure 4 and Figure 5 As shown, the aforementioned air conditioner outdoor unit may further include a driving mechanism and a movable baffle 8. The driving mechanism is used to drive the movable baffle 8 to move to a first position in the first state, and to drive the movable baffle 8 to move to a second position in the second state. Figure 4 As shown, the movable baffle 8 blocks the second air inlet 7 and opens the first air inlet 10. In the second position, as shown Figure 5 As shown, the movable baffle 8 blocks the first air inlet 10 and opens the second air inlet 7. When the movable baffle 8 blocks the first air inlet 10, the first air inlet 10 can be closed. When the movable baffle 8 blocks the second air inlet 7, the second air inlet 7 can be closed.

[0071] In the above example, the driving mechanism can achieve the effect of closing the first air inlet 10 and the second air inlet 7 when one of them is opened by driving the movable baffle 8 to move to different positions.

[0072] In order to realize the function of the above-mentioned driving mechanism, in some embodiments, as Figure 1 and Figure 2 As shown, the aforementioned driving mechanism may include a power device and a gear 5. The aforementioned movable baffle 8 is provided with a transmission tooth 6. The gear 5 is meshed with the transmission tooth 6. The aforementioned driving mechanism drives the gear 5 to rotate through the power device, so that the gear 5 drives the movable baffle 8 to move to the aforementioned first position or second position through the transmission tooth 6, thereby realizing the function of the aforementioned driving mechanism driving the movable baffle 8 to run to the first position or the second position.

[0073] In some embodiments, Figure 2 As shown, the aforementioned power device may include a motor 4 to drive the gear 5 to rotate through the motor 4 .

[0074] In a specific application example, Figure 1 As shown, the aforementioned air-conditioning outdoor unit may include a casing, and the casing has a first side plate 14, a second side plate 15, a third side plate 16, a fourth side plate 17, a top plate and a bottom plate 18. The first side plate 14, the second side plate 15, the third side plate 16 and the fourth side plate 17 are connected end to end in sequence to form a cylindrical structure with openings at both ends. The top plate covers the upper opening of the cylindrical structure. The bottom plate 18 covers the lower opening of the cylindrical structure. The aforementioned air-conditioning outdoor unit also includes a partition plate 3, which is arranged in the casing. The partition plate 3 is in contact with the top plate, the second side plate 15, the bottom plate 18 and the fourth side plate 17 in the circumferential direction in sequence. The space enclosed by the partition plate 3, the top plate, the first side plate 14 and the bottom plate 18 forms the aforementioned air passage 1.

[0075] In the above example, the air passage 1 is formed by the casing and the partition plate 3, which facilitates the processing of the air passage 1. The space between the partition plate 3 and the third side plate 16 forms a first chamber 13, which is used to accommodate the compressor.

[0076] In some embodiments, Figure 1 As shown, the space between the second side plate 15 and the heat exchanger 2 forms the first air duct section 11. The space between the fourth side plate 17 and the heat exchanger 2 forms the second air duct section 12.

[0077] The first air outlet 101 mentioned above can be disposed on the second side plate 15 , and the second air outlet 102 mentioned above can be disposed on the fourth side plate 17 .

[0078] In some embodiments, Figure 4 and Figure 5 As shown, the aforementioned first side plate 14 has a third surface located in the air passage 1. One end of the aforementioned heat exchanger 2 divides the third surface into a first area and a second area, the first area is located in the first air duct section 11, and the second area is located in the second air duct section 12. Among them, the first air inlet 10 is arranged in the first area, and the second air inlet 7 is arranged in the second area. The aforementioned movable baffle 8 can be slidably matched with the first side plate 14, and the movable baffle 8 slides along the first side plate 14 to the aforementioned first position or second position.

[0079] The embodiment of the present invention further provides an air conditioner, which may include any of the above-mentioned air conditioner outdoor units. Among them, because the air conditioner adopts the above-mentioned air conditioner outdoor unit, compared with the solution in the prior art that one side of the heat exchanger is always the windward side, when the side of the heat exchanger is severely frosted, the air conditioner needs to be stopped for defrosting. However, the present invention makes the two sides of the heat exchanger 2 alternately become the windward side. When one side of the heat exchanger 2 is severely frosted as the windward side, the operating state of the air conditioner outdoor unit can be switched, so that the other side of the heat exchanger 2 is used as the windward side, so that the heating time of the air conditioner can be extended, thereby reducing the frequency of air conditioner shutdown for defrosting.

[0080] like Figure 6 As shown, the present invention also provides a control method for an air conditioner outdoor unit, which comprises the following steps:

[0081] The air conditioner outdoor unit operates in the heating mode of the air conditioner, and the heat exchanger 2 of the air conditioner outdoor unit is used as an evaporator.

[0082] When the air-conditioning outdoor unit is operating in the first state, the current I1 of the first fan 19 is detected to determine whether I1 is greater than the first preset value. If I1 is less than or equal to the first preset value, the air-conditioning outdoor unit is kept operating in the first state; if I1 is greater than the first preset value, the surface temperature T2 of the second side 22 is monitored; when T2 ≥ the ambient dew point temperature and is maintained for more than the first preset time, the air-conditioning outdoor unit is switched to the second state operation; if T2 is less than the ambient dew point temperature, the first fan 19 and the second fan 20 are both turned off, and the air-conditioning outdoor unit is controlled to enter the defrost mode; wherein 1.1Ie1<first preset value≤1.2Ie1, Ie1 is the current of the first fan 19 when the heat exchanger 2 is not frosted.

[0083] Among them, when the air conditioner outdoor unit is running in the first state, the first fan 19 is turned on and the second fan 20 is turned off. At this time, when the first side 21 of the heat exchanger 2 is frosted, the frost layer will increase the air flow resistance, and the first fan 19 needs to overcome a greater resistance to maintain the same air volume, so the current of the first fan 19 will increase. When I1 is greater than the first preset value, it proves that the air resistance is large and the frosting on the first side 21 is more serious. At this time, the frosting condition of the second side 22 of the heat exchanger 2 is judged to determine whether it is necessary to switch the fan operation or directly enter the defrosting mode. If the temperature of the second side 22 of the heat exchanger 2 is greater than the ambient dew point temperature and is maintained for more than the first preset time, it proves that the frosting degree of the second side 22 of the heat exchanger 2 has been alleviated, so the second fan 20 can be turned on to continue to operate the heating for a period of time. If the frosting degree of the second side 22 is still very serious, that is, less than the dew point temperature, it proves that the frosting on the second side 22 has not been alleviated and it is necessary to enter the defrosting mode.

[0084] It should be noted here that the first preset time mentioned above can be 10 seconds to 30 seconds.

[0085] When the air-conditioning outdoor unit is operating in the second state, the current I2 of the second fan 20 is detected to determine whether I2 is greater than the second preset value. If I2 is less than or equal to the second preset value, the air-conditioning outdoor unit is kept operating in the second state; if I2 is greater than the second preset value, the surface temperature T1 of the first side 21 is monitored; when T1≥the ambient dew point temperature and is maintained for more than the second preset time, the air-conditioning outdoor unit is switched to the first state operation; if T1 is less than the ambient dew point temperature, both the first fan 19 and the second fan 20 are turned off, and the air-conditioning outdoor unit is controlled to enter the defrost mode; wherein 1.1Ie2<the second preset value≤1.2Ie2, Ie2 is the current of the second fan 20 when the heat exchanger 2 is not frosted.

[0086] Among them, when the air conditioner outdoor unit is running in the second state, the second fan 20 is turned on and the first fan 19 is turned off. When the second side 22 of the heat exchanger 2 is frosted, the frost layer will increase the air flow resistance, and the second fan 20 needs to overcome a greater resistance to maintain the same air volume, so the current of the second fan 20 will increase. When I2 is greater than the second preset value, it proves that the air resistance is large and the frosting on the second side 22 is more serious. At this time, the frosting condition of the first side 21 of the heat exchanger 2 is judged to determine whether it is necessary to switch the fan operation or directly enter the defrosting mode. If the temperature of the first side 21 of the heat exchanger 2 is greater than the ambient dew point temperature and is maintained for more than the second preset time, it proves that the frosting degree of the first side 21 of the heat exchanger 2 has been alleviated, so the first fan 19 can be turned on to continue to operate the heating for a period of time. If the frosting degree of the first side 21 is still very serious, that is, less than the dew point temperature, it proves that the frosting on the first side 21 has not been alleviated and it is necessary to enter the defrosting mode.

[0087] It should be noted here that the second preset time mentioned above can be 10 seconds to 30 seconds.

[0088] The control method of the air conditioner outdoor unit further comprises the following steps:

[0089] When the air-conditioning outdoor unit is in the defrost mode, the surface temperature T1 of the first side 21 and the surface temperature T2 of the second side 22 are monitored simultaneously. When T1≥ambient dew point temperature and T2≥ambient dew point temperature within the third preset time period, the air-conditioning outdoor unit is controlled to end the defrost mode.

[0090] When the air conditioner outdoor unit is in the defrost mode, the heat exchanger 2 of the air conditioner outdoor unit is used as a condenser. If the surface temperature T1 of the first side 21 and the surface temperature T2 of the second side 22 are both greater than or equal to the ambient dew point temperature within the third preset time period, it means that the degree of frost on the first side 21 and the second side 22 of the heat exchanger 2 is alleviated, so the defrost mode can be ended.

[0091] It should be noted here that: the third preset time mentioned above can be 10 seconds to 30 seconds.

[0092] For ease of understanding, the overall structure of the present invention is described below, and its working principle is explained.

[0093] In the air conditioning heating mode, when the air conditioning outdoor unit is in the first state, the first fan 19 is turned on, the second fan 20 is turned off, and the motor 4 drives the movable baffle 8 to move to the first position, so that the movable baffle 8 blocks the second air inlet 7, and the movable baffle 8 opens the first air inlet 10. The wind enters the first air duct section 11 of the air passage 1 from the first air inlet 10 and the first air outlet 101, and the wind flows through the heat exchanger 2 into the second air duct section 12. The wind exchanges heat with the heat exchanger 2 when passing through the heat exchanger 2. At this time, the first side 21 of the heat exchanger 2 is the windward side, and the second side 22 is the leeward side. Due to the continuous circulation of the airflow on the windward side, the air volume is higher, and it encounters a colder evaporator, and the degree of frost is higher.

[0094] When the surface of the first side 21 of the heat exchanger 2 is severely frosted, the air conditioner outdoor unit is switched to the second state, at which time the first fan 19 is turned off and the second fan 20 is turned on, and the motor 4 drives the movable baffle 8 to move to the second position, at which time the movable baffle 8 blocks the first air inlet 10 and opens the second air inlet 7. The wind enters the second air duct section 12 of the air passage 1 from the second air inlet 7 and the second air outlet 102, and the wind flows through the heat exchanger 2 into the first air duct section 11. When the wind flows through the heat exchanger 2, it exchanges heat with the heat exchanger 2. At this time, the second side 22 of the heat exchanger 2 is the windward side, and the first side 21 is the leeward side. Due to the continuous circulation of airflow on the windward side, the air volume is higher, and it encounters a colder evaporator, and the degree of frost is higher.

[0095] When the second side 22 of the heat exchanger 2 is severely frosted, the air conditioner outdoor unit can be switched to the first state, in which the second fan 20 is turned off, and the first fan 19 is turned on, and the motor 4 drives the movable baffle 8 to move to the first position, so that the movable baffle 8 blocks the second air inlet 7, and the movable baffle 8 opens the first air inlet 10. The present invention can realize the alternating operation of the first fan 19 and the second fan 20, so that the two sides of the heat exchanger 2 are alternately the windward side, thereby extending the heating time of the air conditioner.

[0096] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0097] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. An air conditioner outdoor unit, comprising a heat exchanger (2) and a fan device, wherein the fan device is used to drive airflow through the heat exchanger (2) to perform heat exchange with the heat exchanger (2); characterized in that: The heat exchanger (2) has a first side (21) and a second side (22) opposite to each other; The air conditioner outdoor unit has at least two states, wherein in a first state, the fan device drives the airflow to flow from the first side (21) to the second side (22) through the heat exchanger (2), so that the first side (21) is the windward side and the second side (22) is the leeward side; in a second state, the fan device drives the airflow to flow from the second side (22) to the first side (21) through the heat exchanger (2), so that the second side (22) is the windward side and the first side (21) is the leeward side.

2. The air conditioner outdoor unit according to claim 1, characterized in that: The fan device comprises a first fan (19) and a second fan (20), wherein the first fan (19) is used for driving an airflow from the first side (21) to the second side (22) through the heat exchanger (2) when started; and the second fan (20) is used for driving an airflow from the second side (22) to the first side (21) through the heat exchanger (2) when started; Wherein, in the first state, the first fan (19) is started and the second fan (20) is turned off; in the second state, the first fan (19) is turned off and the second fan (20) is started.

3. The air conditioner outdoor unit according to claim 2, characterized in that: Also includes an air passage (1); The heat exchanger (2) is located in the air passage (1) and divides the air passage (1) into a first air passage section (11) and a second air passage section (12); the first air passage section (11) and the second air passage section (12) are arranged in sequence along the air flow direction of the air passage (1); wherein the first side (21) is located in the first air passage section (11), and the second side (22) is located in the second air passage section (12).

4. The air conditioner outdoor unit according to claim 3, characterized in that: The first air duct section (11) has a first air outlet (101) and a first air inlet (10), the first air inlet (10) and the first air outlet (101) are located on different sides of the first air duct section (11), and the first fan (19) is used to draw air from the first air outlet (101) and the first air inlet (10).

5. The air conditioner outdoor unit according to claim 4, characterized in that: The first air outlet (101) is opposite to the first side (21), and the first fan (19) is an axial flow fan arranged at the first air outlet (101).

6. The air conditioner outdoor unit according to any one of claims 3 to 5, characterized in that: The second air duct section (12) has a second air outlet (102) and a second air inlet (7), the second air inlet (7) and the second air outlet (102) are located on different sides of the second air duct section (12), and the second fan (20) is used to draw air from the second air outlet (102) and the second air inlet (7).

7. The air conditioner outdoor unit according to claim 6, characterized in that: The second air outlet (102) is opposite to the second side (22), and the second fan (20) is an axial flow fan arranged at the second air outlet (102).

8. The air conditioner outdoor unit according to claim 6, characterized in that: When the first air duct section (11) has a first air port (101) and a first air inlet (10), and the first air inlet (10) and the first air port (101) are located on different sides of the first air duct section (11), and the first fan (19) is used to draw air from the first air port (101) and the first air inlet (10), The first air inlet (10) and the second air inlet (7) are located on the same side of the air conditioner outdoor unit, and both the first air inlet (10) and the second air inlet (7) can be opened and closed; in the first state, the first air inlet (10) is open, and the second air inlet (7) is closed; in the second state, the first air inlet (10) is closed, and the second air inlet (7) is open.

9. The air conditioner outdoor unit according to claim 8, characterized in that: The air conditioner outdoor unit also includes a driving mechanism and a movable baffle (8), wherein the driving mechanism is used to drive the movable baffle (8) to move to a first position in the first state, and to drive the movable baffle (8) to move to a second position in the second state; wherein, in the first position, the movable baffle (8) blocks the second air inlet (7) and opens the first air inlet (10); and in the second position, the movable baffle (8) blocks the first air inlet (10) and opens the second air inlet (7).

10. The air conditioner outdoor unit according to claim 9, characterized in that: The driving mechanism comprises a power device and a gear (5); the movable baffle (8) is provided with a transmission tooth (6); the gear (5) meshes with the transmission tooth (6); the driving mechanism drives the gear (5) to rotate through the power device, so that the gear (5) drives the movable baffle (8) to move to the first position or the second position through the transmission tooth (6).

11. The air conditioner outdoor unit according to any one of claims 3 to 5 and 7 to 10, characterized in that: The machine body also includes a casing, wherein the casing comprises a first side plate (14), a second side plate (15), a third side plate (16), a fourth side plate (17), a top plate and a bottom plate (18); the first side plate (14), the second side plate (15), the third side plate (16) and the fourth side plate (17) are sequentially connected end to end to form a cylindrical structure with openings at both ends, the top plate covers the upper opening of the cylindrical structure, and the bottom plate (18) covers the lower opening of the cylindrical structure; The air conditioner outdoor unit further comprises a partition plate (3), wherein the partition plate (3) is arranged in the casing, and the partition plate (3) is abutted against the top plate, the second side plate (15), the bottom plate (18) and the fourth side plate (17) in sequence along the circumferential direction, and the space enclosed by the partition plate (3), the top plate, the first side plate (14) and the bottom plate (18) forms the air passage (1).

12. An air conditioner, characterized in that: An air-conditioning outdoor unit comprising any one of claims 1-11.

13. A control method for an air conditioner outdoor unit according to any one of claims 2 to 11, characterized in that: include: The air conditioner outdoor unit operates in the heating mode of the air conditioner; When the air-conditioning outdoor unit is operating in the first state, the current I1 of the first fan (19) is detected to determine whether I1 is greater than a first preset value; if I1 is less than or equal to the first preset value, the air-conditioning outdoor unit is kept operating in the first state; if I1 is greater than the first preset value, the surface temperature T2 of the second side (22) is monitored; when T2 is greater than or equal to the ambient dew point temperature and is maintained for more than a first preset time, the air-conditioning outdoor unit is switched to the second state for operation; if T2 is less than the ambient dew point temperature, both the first fan (19) and the second fan (20) are turned off, and the air-conditioning outdoor unit is controlled to enter a defrosting mode; wherein 1.1Ie1<first preset value≤1.2Ie1, and Ie1 is the current of the first fan (19) when the heat exchanger (2) is not frosted; When the air-conditioning outdoor unit is operating in the second state, the current I2 of the second fan (20) is detected to determine whether I2 is greater than a second preset value; if I2 is less than or equal to the second preset value, the air-conditioning outdoor unit is kept operating in the second state; if I2 is greater than the second preset value, the surface temperature T1 of the first side (21) is monitored; when T1 is greater than or equal to the ambient dew point temperature and is maintained for more than the second preset time, the air-conditioning outdoor unit is switched to the first state for operation; if T1 is less than the ambient dew point temperature, both the first fan (19) and the second fan (20) are turned off, and the air-conditioning outdoor unit is controlled to enter the defrosting mode; wherein 1.1Ie2<second preset value≤1.2Ie2, and Ie2 is the current of the second fan (20) when the heat exchanger (2) is not frosted.

14. The control method of the air conditioner outdoor unit according to claim 13, characterized in that: When the air-conditioning outdoor unit is in the defrost mode, the surface temperature T1 of the first side (21) and the surface temperature T2 of the second side (22) are monitored simultaneously. When T1≥ambient dew point temperature and T2≥ambient dew point temperature within a third preset time period, the air-conditioning outdoor unit is controlled to end the defrost mode.

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