An electric control box, air conditioner and control method

Abstract

The application discloses an electric control box, an air conditioner and a control method, which comprise a shell, a water collecting tank and a water collecting disc outside the shell; a first containing cavity for placing a driving board is arranged in the shell, a second containing cavity is arranged in the first containing cavity and is closed, and a third containing cavity is arranged in the second containing cavity and is closed; the water collecting disc, the second containing cavity and the third containing cavity are communicated with the water collecting tank through pipelines respectively; a water pumping device is arranged in the water collecting tank and is used for conveying water in the water collecting tank to the second containing cavity or the third containing cavity. Thus, the heat in the second containing cavity is absorbed by the condensate water in the third containing cavity, the water in the second containing cavity absorbs the heat in the first containing cavity, the electric control box is effectively cooled, the temperature of the water in the second containing cavity is prevented from being too low, the condensation in the first containing cavity is prevented from being easily formed, and the risk of electrical short circuit of the electric control box is reduced.

Description

Technical Field

[0001] This invention relates to the field of refrigeration technology, and in particular to an electrical control box, an air conditioner, and a control method. Background Technology

[0002] Currently, most inverter air conditioners use refrigerant cooling or return airflow to cool the electrical control box. These solutions have certain drawbacks: 1. High cooling energy consumption; 2. In high-temperature conditions or during long-term operation, the cooling effect of the drive board is not good, which cannot meet the cooling requirements of the air conditioner in high-temperature environments or during long-term operation. The air conditioner is prone to tripping protection or burning out components.

[0003] Existing technology proposes using the condensate produced during air conditioner operation to directly cool the air conditioner's electrical control box, but this technology has the following shortcomings: Under high-temperature conditions, directly using condensate to cool the air conditioner's electrical control box can easily cause condensation to form inside the control box, which could lead to an electrical short circuit. Summary of the Invention

[0004] In view of this, the present invention provides an electrical control box, an air conditioner, and a control method to solve the problem that in the prior art, the electrical control box of an air conditioner directly uses condensate water for heat dissipation, which leads to condensation easily forming inside the electrical control box, thereby causing the electrical control box to have the risk of electrical short circuit.

[0005] To achieve one or more of the above objectives or other objectives, the technical solution of the present invention is an electrical control box, including a housing and a water collection tank and a water collection tray located outside the housing; The housing has a first receiving cavity for placing the drive plate, a second receiving cavity within the first receiving cavity, and a third receiving cavity within the second receiving cavity. The water collection tray, the second receiving cavity, and the third receiving cavity are respectively connected to the water collection tank through pipes; The water collection tank is equipped with a pumping device, which is used to transport the water in the water collection tank to the second or third receiving cavity; the water collection tray is used to collect the condensate generated by the air conditioner.

[0006] Furthermore, the second receiving cavity is connected to the water collection tank through a first pipe, and a cooling tower is provided on the first pipe for initially cooling the water flowing into the second receiving cavity; The first pipe between the cooling tower and the water collection tank is also equipped with a first control valve.

[0007] Furthermore, the third receiving cavity is connected to the water collection tank through a second pipe, and a flow control valve is provided on the second pipe. The flow control valve is used to control the flow rate of condensate in the water collection tank into the third receiving cavity.

[0008] Furthermore, a humidity sensor and a first temperature sensor are provided on the inner wall of the first receiving cavity; The humidity sensor is used to detect the air humidity inside the first receiving cavity; the first temperature sensor is used to detect the air temperature inside the first receiving cavity. The second containment cavity is equipped with a second temperature sensor, which is used to detect the temperature of the water in the second containment cavity; A third temperature sensor is provided on the drive board inside the first receiving cavity, which is used to detect the temperature of the drive board.

[0009] Furthermore, the bottom wall of the second receiving cavity is provided with a first drain outlet, and the bottom wall of the third receiving cavity is provided with a second drain outlet; Both the first and second drain outlets are connected to the water collection tank via a fourth pipe; Furthermore, a second control valve is provided on the side of the fourth pipe near the water collection tank.

[0010] Furthermore, a first water outlet is provided on the upper part of one side wall of the second receiving cavity; a second water outlet is provided on the upper part of one side wall of the third receiving cavity; and a third water outlet is provided on the upper part of one side wall of the water collection tank. The first outlet is used to discharge water in the second receiving cavity that is higher than the first outlet to the outside through a pipe; The second outlet is used to discharge water in the third receiving cavity that is higher than the second outlet to the outside through a pipe; The third outlet is used to discharge water in the water collection tank that is higher than the third outlet to the outside through a pipe.

[0011] An air conditioner includes the aforementioned electrical control box.

[0012] A method for controlling an air conditioner as described above, comprising: S1: After the electrical control box is started, the water in the water collection tank is cooled to the first preset temperature and then transported to the second receiving chamber; S2: Detect the temperature of the drive board. When the temperature T3 of the drive board is greater than or equal to the second preset temperature, start the pumping device and flow control valve to transport the condensate collected in the water collection tank to the third receiving chamber. S3: Detect the temperature T2 of the water in the second containment chamber, and adjust the opening angle of the flow control valve according to the threshold temperature range in which temperature T2 is located; S4: Close the electrical control box to drain the water in the second and third containment chambers back into the water collection tank.

[0013] Furthermore, the threshold temperature range includes a first threshold temperature range and a second threshold temperature range; When temperature T2 is within the first threshold temperature range, adjust the opening angle of the flow control valve, including: The opening and closing angle of the flow control valve is reduced at preset intervals until the temperature T2 exceeds the first threshold temperature range. When the temperature range T2 is within the second threshold temperature range, adjust the opening angle of the flow control valve, including: Increase the opening angle of the flow control valve at preset intervals until the temperature T2 exceeds the second threshold temperature range. The first threshold temperature range is less than Tw+3℃, and the second threshold temperature range is greater than or equal to Tw+3℃. The preset time is 30 seconds, and Tw is the dew point temperature.

[0014] Furthermore, the formula for calculating the dew point temperature Tw is as follows: Tw=237.7*[(17.27*T1) / (237.7+T1)+ln(RH / 100)] / [17.27-(17.27*T1) / (237.7+T1)-ln(RH / 100)]; Wherein, T1 is the temperature inside the first receiving cavity detected by the first temperature sensor, and RH is the humidity inside the first receiving cavity detected by the humidity sensor.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This invention first transports water from the water collection tank to the second receiving chamber, and then transports the collected condensate to the third receiving chamber. In this way, the condensate in the third receiving chamber absorbs heat from the second receiving chamber, causing the water temperature in the second receiving chamber to drop. Then, the low-temperature water in the second receiving chamber absorbs heat from the first receiving chamber. In this way, the condensate in the third receiving chamber indirectly controls the water temperature in the second receiving chamber, which not only allows the electrical control box to dissipate heat effectively, but also prevents the water temperature in the second receiving chamber from becoming too low, so that condensation will not easily form in the first receiving chamber, thereby reducing the risk of electrical short circuits in the electrical control box. 2. This invention also allows for the reuse of condensate generated by the air conditioner evaporator, improving the utilization rate of condensate and reducing the cooling energy consumption of the electrical control box. Attached Figure Description

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings are used to distinguish different objects and not to describe a particular order.

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the electrical control box of the present invention; Figure 2 for Figure 1 Enlarged schematic diagram of reference numeral A in the attached figure; Figure 3 for Figure 1 Enlarged schematic diagram of reference numeral B in the attached figure; Figure 4 This is a flowchart of the air conditioner control method of the present invention.

[0019] Figure label: 1. Shell; 2. Water collection tank; 21. Pumping device; 22. First pipe; 23. Second pipe; 24. Third pipe; 25. Fourth pipe; 26. Third outlet; 3. Water collection tray; 4. First receiving cavity; 41. Driver board; 42. Humidity sensor; 43. First temperature sensor; 44. Third temperature sensor; 5. Second receiving cavity; 51. Second temperature sensor; 52. First drain outlet; 53. First water outlet; 6. Third receiving cavity; 61. Second drain outlet; 62. Second water outlet; 7. Cooling tower; 8. First control valve; 9. Flow control valve; 10. Second control valve; 100. Evaporator. Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Therefore, a feature pointed out in this specification is used to illustrate one feature of one embodiment of the invention, and does not imply that every embodiment of the invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0021] The principles and structure of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0022] As one embodiment, refer to the appendix Figure 1-3 The present invention proposes an electrical control box, including a housing 1 and a water collection tank 2 and a water collection tray 3 located outside the housing 1.

[0023] The housing 1 has a first receiving cavity 4 for placing the drive plate 41, a sealed second receiving cavity 5 inside the first receiving cavity 4, and a sealed third receiving cavity 6 inside the second receiving cavity 5.

[0024] The water collection tray 3, the second receiving cavity 5, and the third receiving cavity 6 are respectively connected to the water collection tank 2 through pipes.

[0025] The water collection tank 2 is equipped with a water pumping device 21, which is used to transport the water in the water collection tank 2 to the second receiving cavity 5 or the third receiving cavity 6; the water collection tray 3 is used to collect the condensate generated by the air conditioner.

[0026] In this embodiment, the electrical control box of the present invention is further provided with a control center, which controls the operation of other devices or components in the electrical control box; the condensate collected in the water collection pan 3 is preferably the condensate generated by the evaporator 100 of the air conditioner; the water pumping device 21 is preferably a water pump.

[0027] The water collection tank 2 is pre-filled with water or retains condensate generated by the evaporator 100 during the last air conditioner startup. At this time, the temperature of the water in the water collection tank 2 is close to the ambient temperature. The temperature of the condensate generated by the evaporator 100 of the air conditioner is generally 15℃. When the condensate is transported to the water collection tank 2 for storage through the third pipe 24, the temperature of the condensate will rise by 4℃-5℃, that is, the temperature of the condensate in the water collection tank 2 is generally 19℃-20℃.

[0028] When the electrical control box is started, the control center controls the water pumping device 21 to first transport the water in the water collection tank 2 to the second receiving chamber 5 through the pipe. Then, the water in the second receiving chamber 5 absorbs the heat from the first receiving chamber 4, thereby dissipating heat from the electrical control box. Then, the water collection pan transports the condensate generated by the evaporator 100 to the water collection tank 2 through the third pipe 24. When the condensate in the water collection tank 2 reaches the designated height, the control center controls the water pumping device 21 again to transport the condensate in the water collection tank 2 to the third receiving chamber 6 through the pipe. Then, the condensate in the third receiving chamber 6 absorbs the heat from the second receiving chamber 5, causing the temperature of the water in the second receiving chamber 5 to drop. Then, the low-temperature water in the second receiving chamber 5 absorbs the heat from the first receiving chamber 4. In this way, the temperature of the water in the second receiving chamber 5 is indirectly controlled by the condensate in the third receiving chamber 6. This allows the electrical control box to dissipate heat effectively while preventing the temperature of the water in the second receiving chamber 5 from becoming too low, so that condensation will not easily form in the first receiving chamber 4, thereby reducing the risk of electrical short circuits caused by condensation in the electrical control box.

[0029] This allows for the reuse of condensate generated by the air conditioner evaporator 100, improving condensate utilization and reducing the cooling energy consumption of the control box. Among them, refer to the appendix Figure 1 The second receiving cavity 5 is connected to the water collection tank 2 through the first pipe 22. The first pipe 22 is equipped with a cooling tower 7, which is used to initially cool the water flowing into the second receiving cavity 5. The first pipe 22 between the cooling tower 7 and the water collection tank 2 is also equipped with a first control valve 8.

[0030] When the electrical control box is not started, the temperature of the water in the water collection tank 2 is the same as the outside temperature. Therefore, in summer or other high-temperature environments, the temperature of the water in the water collection tank 2 is generally higher than 25°C. As a result, when the water pumping device 21 directly transports the water in the water collection tank 2 to the second receiving cavity 5, it is not conducive to heat dissipation of the electrical control box.

[0031] Therefore, when the electrical control box is started, the control center first activates the first control valve 8. When the water pumping device 21 transports the water from the water collection tank 2 to the second receiving cavity 5 through the first pipe 22, it will first pass through the cooling tower 7 for preliminary cooling, so that the temperature of the water flowing into the second receiving cavity 5 is between 25℃ and 26℃. When the temperature of the water in the second receiving cavity 5 is 25℃-26℃, it can dissipate heat from the electrical control box without easily causing condensation to form in the first receiving cavity 4 inside the electrical control box. After the water pumping device 21 has transported all the water from the water collection tank 2 to the second receiving cavity 5, the control center will close the first control valve 8 to prevent water from the water collection tank 2 from continuing to be transported to the second receiving cavity 5.

[0032] Among them, refer to the appendix Figure 1The inner wall of the first accommodating cavity 4 is provided with a humidity sensor 42 and a first temperature sensor 43; the humidity sensor 42 is used to detect the air humidity in the first accommodating cavity 4; the first temperature sensor 43 is used to detect the air temperature in the first accommodating cavity 4.

[0033] The second containment cavity 5 is provided with a second temperature sensor 51, which is used to detect the temperature of the water in the second containment cavity 5.

[0034] A third temperature sensor 44 is provided on the drive plate 41 inside the first receiving cavity 4. The third temperature sensor 44 is used to detect the temperature of the drive plate 41.

[0035] In this way, the humidity sensor 42, the first temperature sensor 43, the second temperature sensor 51, and the third temperature sensor 44 can detect the humidity or temperature at the corresponding location in real time and transmit the detected data to the control center, which will then perform corresponding control operations based on the received data.

[0036] Among them, refer to the appendix Figure 1 The third receiving cavity 6 is connected to the water collection tank 2 through the second pipe 23. The second pipe 23 is equipped with a flow control valve 9, which is used to control the flow rate of condensate in the water collection tank 2 into the third receiving cavity 6.

[0037] When the third temperature sensor 44 detects that the temperature of the drive board 41 is greater than or equal to 60°C and transmits it to the control center, the control center will start the water pumping device 21 and the flow control valve 9. The water pumping device 21 will transport the condensate in the water collection tank 2 to the third receiving cavity 6 through the second pipe 23, thereby absorbing the heat in the second receiving cavity 5 and lowering the temperature of the water in the second receiving cavity 5. However, the temperature of the water in the second receiving cavity 5 will not drop continuously, but will remain at 23°C-26°C. Then, the low-temperature water in the second receiving cavity 5 will absorb the heat in the first receiving cavity 4, thereby achieving the effect of heat dissipation for the electrical control box. This also prevents the temperature of the water in the second receiving cavity 5 from dropping too much, so that condensation will not easily form in the first receiving cavity 4, thereby reducing the risk of electrical short circuit caused by condensation in the electrical control box.

[0038] Among them, refer to the appendix Figure 1 The bottom wall of the second receiving cavity 5 is provided with a first drain outlet 52, and the bottom wall of the third receiving cavity 6 is provided with a second drain outlet 61; both the first drain outlet 52 and the second drain outlet 61 are connected to the water collection tank 2 through a fourth pipe 25; and a second control valve 10 is provided on the side of the fourth pipe 25 near the water collection tank 2.

[0039] After the electrical control box is shut down, the control center will activate the second control valve 10, causing the water in the second and third receiving chambers 5 and 6 to drain back into the collection tank 2 through the fourth pipe 25. The control center will not close the second control valve 10 until the electrical control box is restarted.

[0040] Among them, refer to the appendix Figure 1-3 The upper part of one side wall of the second receiving cavity 5 is provided with a first water outlet 53; the upper part of one side wall of the third receiving cavity 6 is provided with a second water outlet 62; the upper part of one side wall of the water collection tank 2 is provided with a third water outlet 26; the height between the first water outlet 53 and the bottom wall of the second receiving cavity 5 is H1, the height between the second water outlet 62 and the bottom wall of the third receiving cavity 6 is H2, and the height between the third water outlet 26 and the bottom wall of the water collection tank 2 is H3, and H3 > 2H1, H1 > 2H2, H2 > 10mm.

[0041] The first outlet 53 is used to discharge water in the second receiving cavity 5 that is higher than the first outlet 53 to the outside through a pipe; the second outlet 62 is used to discharge water in the third receiving cavity 6 that is higher than the second outlet 62 to the outside through a pipe; the third outlet 26 is used to discharge water in the water collection tank 2 that is higher than the third outlet 26 to the outside through a pipe.

[0042] Therefore, after the pumping device 21 delivers water from the water collection tank 2 to the second receiving cavity 5, the first outlet 53 will discharge the water in the second receiving cavity 5 that is higher than the first outlet 53 to the outside through a pipe, preventing the water in the second receiving cavity 5 from becoming stagnant and thus preventing subsequent water from being delivered to the second receiving cavity 5, which would affect the heat dissipation effect of the electrical control box. Similarly, after the pumping device 21 delivers all the water from the water collection tank 2 to the third receiving cavity 6, the second outlet 62 will discharge the water in the third receiving cavity 6 that is higher than the second outlet 62 to the outside through a pipe, preventing the water in the third receiving cavity 6 from becoming stagnant and thus preventing subsequent water from being delivered to the third receiving cavity 6, which would affect the heat dissipation effect of the electrical control box. Similarly, when the water collection tray 3 delivers condensate to the water collection tank 2 or the water in the second and third accommodating chambers 5 and 6 and returns it to the water collection tank 2, the third outlet 26 will discharge the water in the water collection tank 2 that is higher than the third outlet 26 through the pipe to the outside, to prevent the water collection tank 2 from being unable to store water, and to prevent water from remaining in the second or third accommodating chamber 5 or the corresponding pipes, which would affect the subsequent use and heat dissipation of the electrical control box.

[0043] As one embodiment, the present invention also proposes an air conditioner, including the electrical control box described above.

[0044] As one embodiment, refer to the appendix Figure 4 The present invention also proposes a control method for the air conditioner described above, comprising: S1: After the electrical control box is started, the water in the water collection tank 2 is cooled to the first preset temperature and then transported to the second receiving chamber 5; that is, the water pumping device 21 will transport the water in the water collection tank 2 to the cooling tower 7 for preliminary cooling to the first preset temperature (preferably 25℃-26℃), and then transport it to the second receiving chamber 5. Of course, if the water in the water collection tank 2 is not higher than the first preset temperature, it is not necessary to transport it to the cooling tower 7 for preliminary cooling, but directly to the second receiving chamber 5, and after all the water in the water collection tank 2 has been transferred to the second receiving chamber 5, the water pumping device 21 is turned off.

[0045] S2: Detect the temperature of the drive plate 41. When the temperature T3 of the drive plate 41 is greater than or equal to the second preset temperature, start the pumping device 21 and the flow control valve 9 to transport the condensate collected in the water collection tank 2 to the third receiving chamber 6. The second preset temperature is preferably 60°C.

[0046] Simultaneously, humidity sensor 42, first temperature sensor 43, second temperature sensor 51, and third temperature sensor 44 are activated. Humidity sensor 42 is used to detect the air humidity RH in the first receiving cavity 4; first temperature sensor 43 is used to detect the air temperature T1 in the first receiving cavity 4; second temperature sensor 51 is used to detect the water temperature T2 in the second receiving cavity 5; and third temperature sensor 44 is used to detect the temperature T3 of the drive board 41.

[0047] S3: Detect the temperature T2 of the water in the second containment chamber 5, and adjust the opening angle of the flow control valve 9 according to the threshold temperature range in which the temperature T2 is located.

[0048] The threshold temperature range includes a first threshold temperature range and a second threshold temperature range.

[0049] When temperature T2 is within the first threshold temperature range, adjust the opening angle of flow control valve 9, including: reducing the opening angle of flow control valve 9 at preset intervals until temperature T2 exceeds the first threshold temperature range.

[0050] When the temperature range T2 is within the second threshold temperature range, adjust the opening angle of the flow control valve 9, including increasing the opening angle of the flow control valve 9 at preset intervals until the temperature T2 exceeds the second threshold temperature range.

[0051] The first threshold temperature range is less than Tw+3℃, and the second threshold temperature range is greater than or equal to Tw+3℃; the preset time is preferably 30 seconds, and Tw is the dew point temperature.

[0052] The formula for calculating the dew point temperature Tw is as follows: Tw=237.7*[(17.27*T1) / (237.7+T1)+ln(RH / 100)] / [17.27-(17.27*T1) / (237.7+T1)-ln(RH / 100)].

[0053] Wherein, T1 is the air temperature detected by the first temperature sensor 43 in the first receiving cavity 4, and RH is the air humidity detected by the humidity sensor 42 in the first receiving cavity 4.

[0054] When the flow control valve 9 is closed, its opening angle is 0°; when the flow control valve 9 is started, its opening angle is 30°. Then, the opening angle of the flow control valve 9 is adjusted according to the actual situation, and the adjustment range is 0°-90°.

[0055] Of course, the initial opening and closing angle of the flow control valve 9 can also be set to 45°, which makes it easier to adjust the opening and closing angle of the flow control valve 9.

[0056] S4: Close the electrical control box, and also close the pumping device 21 and the flow control valve 9, so that the water in the second receiving chamber 5 and the third receiving chamber 6 is drained back into the water collection tank 2.

[0057] Among them, refer to the appendix Figure 4 The air conditioner control method proposed in this invention is as follows: When the air conditioner starts in cooling mode, the electrical control box will also start. At this time, the flow control valve 9 is closed, and the control center will close the second control valve 10, start the water pumping device 21, the cooling tower 7 and the first control valve 8, so that the water pumping device 21 can transport all the water in the water collection tank 2 through the cooling tower 7 to the second receiving chamber 5, and then close the water pumping device 21, the cooling tower 7 and the first control valve 8. When the electrical control box starts, the humidity sensor 42, the first temperature sensor 43, the second temperature sensor 51 and the third temperature sensor 44 will also start to collect the humidity or temperature of the corresponding location in the electrical control box in real time and then upload it to the control center.

[0058] When the third temperature sensor 44 detects that the temperature T3 of the drive board 41 is ≥60℃, the control center will start the pumping device 21 and the flow control valve 9 to transport the condensate in the water collection tank 2 to the third receiving chamber 6. Then, based on the threshold temperature range of the temperature T2 of the second receiving chamber 5 detected by the second temperature sensor 51, the opening angle of the flow control valve 9 will be adjusted. There are two possible scenarios: First, if T2 < Tw + 3℃, the control center will reduce the opening angle of the flow control valve 9 by 3°-5° every 30 seconds until T2 ≥ Tw + 3℃, at which point the air conditioner and electrical control box will operate normally.

[0059] Second, when T2 ≥ Tw + 3℃, the control center will increase the opening angle of the flow control valve 9 by 3°-5° every 30 seconds until T2 < Tw - 3℃, at which point the air conditioner and electrical control box will operate normally.

[0060] When the third temperature sensor 44 detects that the temperature T3 of the drive board 41 is less than 60°C, the control center will shut down the pumping device 21 and the flow control valve 9.

[0061] When the air conditioner is turned off, the electrical control box will also be turned off. At this time, the control center will close the flow control valve 9, the water pumping device 21, the humidity sensor 42, the first temperature sensor 43, the second temperature sensor 51, and the third temperature sensor 44, and start the second control valve 10 to drain the water in the second receiving chamber 5 and the third receiving chamber 6 back into the water collection tank 2 through the fourth pipe 25.

[0062] When the air conditioner and electrical control box are started, the water pumping device 21 will first cool the water in the water collection tank 2 through the cooling tower 7 before sending it to the second receiving cavity 5 to dissipate heat from the drive board 41 and other components located in the first receiving cavity 4 that have just started. After the air conditioner and electrical control box have been running for a period of time, when the third temperature sensor 44 detects that the temperature T3 of the drive board 41 is ≥60℃, the water pumping device 21 will then send the condensate stored in the water collection tank 2 to the third receiving cavity 6. The flow rate of the condensate sent to the third receiving cavity 6 is controlled by the flow rate of the condensate flowing into the third receiving cavity 6. Therefore, the temperature of the water in the second receiving cavity 5 is indirectly controlled by the flow rate of the condensate flowing into the third receiving cavity 6, ensuring that the temperature of the water in the second receiving cavity 5 is not too low, so that condensation will not easily form inside the first receiving cavity 4 of the electrical control box.

[0063] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. An electrical control box, characterized in that: Includes a shell (1) and a water collection tank (2) and a water collection tray (3) located outside the shell (1); The housing (1) is provided with a first receiving cavity (4) for placing the drive plate (41), the first receiving cavity (4) is provided with a sealed second receiving cavity (5), and the second receiving cavity (5) is provided with a sealed third receiving cavity (6). The water collection tray (3), the second receiving cavity (5) and the third receiving cavity (6) are respectively connected to the water collection tank (2) through pipes; The water collection tank (2) is equipped with a pumping device (21), which is used to transport the water in the water collection tank (2) to the second receiving cavity (5) or the third receiving cavity (6); the water collection tray (3) is used to collect the condensate generated by the air conditioner; The second receiving cavity (5) is connected to the water collection tank (2) through the first pipe (22), and a cooling tower (7) is provided on the first pipe (22); The third receiving cavity (6) is connected to the water collection tank (2) through the second pipe (23), and the second pipe (23) is equipped with a flow control valve (9).

2. The electrical control box according to claim 1, characterized in that: The first pipe (22) between the cooling tower (7) and the water collection tank (2) is also equipped with a first control valve (8).

3. The electrical control box according to claim 1, characterized in that: The inner wall of the first receiving cavity (4) is provided with a humidity sensor (42) and a first temperature sensor (43). The humidity sensor (42) is used to detect the air humidity inside the first receiving cavity (4); the first temperature sensor (43) is used to detect the air temperature inside the first receiving cavity (4); The second containment cavity (5) is provided with a second temperature sensor (51), which is used to detect the temperature of the water in the second containment cavity (5); A third temperature sensor (44) is provided on the drive plate (41) inside the first accommodating cavity (4), which is used to detect the temperature of the drive plate (41).

4. The electrical control box according to claim 1, characterized in that: The bottom wall of the second receiving cavity (5) is provided with a first drain outlet (52), and the bottom wall of the third receiving cavity (6) is provided with a second drain outlet (61). The first drain outlet (52) and the second drain outlet (61) are both connected to the water collection tank (2) through the fourth pipe (25); Furthermore, a second control valve (10) is provided on the side of the fourth pipe (25) near the water collection tank (2).

5. The electrical control box according to claim 1, characterized in that: The upper part of one side wall of the second receiving cavity (5) is provided with a first water outlet (53); the upper part of one side wall of the third receiving cavity (6) is provided with a second water outlet (62); the upper part of one side wall of the water collection tank (2) is provided with a third water outlet (26). The first outlet (53) is used to discharge water in the second receiving cavity (5) that is higher than the first outlet (53) to the outside through a pipe; The second outlet (62) is used to discharge water in the third receiving cavity (6) that is higher than the second outlet (62) to the outside through a pipe; The third outlet (26) is used to discharge water in the water collection tank (2) that is higher than the third outlet (26) to the outside through a pipe.

6. An air conditioner, characterized in that, Includes the electrical control box as described in any one of claims 1-5.

7. A control method for an air conditioner as described in claim 6, characterized in that: include: S1: After the electrical control box is started, the water in the water collection tank (2) is cooled to the first preset temperature and transported to the second receiving chamber (5). S2: Detect the temperature of the drive plate (41). When the temperature T3 of the drive plate (41) is greater than or equal to the second preset temperature, start the pumping device (21) and the flow control valve (9) to transport the condensate collected in the water collection tank (2) to the third receiving chamber (6). S3: Detect the temperature T2 of the water in the second containment chamber (5), and adjust the opening angle of the flow control valve (9) according to the threshold temperature range where the temperature T2 is located; S4: Close the electrical control box to drain the water in the second containment chamber (5) and the third containment chamber (6) back into the water collection tank (2).

8. The control method according to claim 7, characterized in that: The threshold temperature range includes a first threshold temperature range and a second threshold temperature range; When temperature T2 is within the first threshold temperature range, adjust the opening angle of the flow control valve (9), including: The opening and closing angle of the flow control valve (9) is reduced at preset intervals until the temperature T2 exceeds the first threshold temperature range. When the temperature range T2 is within the second threshold temperature range, adjust the opening angle of the flow control valve (9), including: Increase the opening angle of the flow control valve (9) at preset intervals until the temperature T2 exceeds the second threshold temperature range. The first threshold temperature range is less than Tw+3℃, and the second threshold temperature range is greater than or equal to Tw+3℃. The preset time is 30 seconds, and Tw is the dew point temperature.

9. The control method according to claim 8, characterized in that: The formula for calculating the dew point temperature Tw is: Tw=237.7*[(17.27*T1) / (237.7+T1)+ln(RH / 100)] / [17.27-(17.27*T1) / (237.7+T1)-ln(RH / 100)]; Wherein, T1 is the temperature detected by the first temperature sensor (43) in the first receiving cavity (4), and RH is the humidity sensor (42) in the first receiving cavity (4) to detect the humidity.

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