Electric control box heat dissipation control device, control method and air conditioning unit

Abstract

The application discloses an electric control box heat dissipation control device, a control method and an air conditioning unit, wherein the electric control box heat dissipation control device comprises: a refrigerant bypass pipeline connected with a refrigerant circulation pipeline of the air conditioning unit and used for bypassing refrigerant in the refrigerant circulation pipeline; and a Tesla valve connected with the refrigerant bypass pipeline, wherein the refrigerant in the refrigerant bypass pipeline flows through the Tesla valve, and the Tesla valve is used for dissipating heat of the electric control box through the refrigerant flowing in the valve body. The application solves the problem of poor heat dissipation effect of the electric control box of the air conditioning unit without air cooling in the prior art, and realizes efficient heat dissipation of the air conditioning unit without air cooling.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric control box, in particular to an electric control box heat dissipation control device, a control method and an air conditioning unit. BACKGROUND

[0002] At present, the electric control box structure of the outdoor unit of the air conditioner mainly relies on the combination of the external refrigerant heat dissipation pipe and the air-cooled radiator for heat dissipation. The temperature control ability of the electric control module connected with the radiator is good, but when the electric control box of the water source, ground source and other air-cooled free air conditioning units is heat dissipated, the heat dissipation effect is poor.

[0003] In view of the poor heat dissipation effect of the electric control box of the air-cooled free air conditioning unit in the related art, no effective solution has been proposed at present. SUMMARY

[0004] The present application provides an electric control box heat dissipation control device, a control method and an air conditioning unit to at least solve the problem of poor heat dissipation effect of the electric control box of the air-cooled free air conditioning unit in the prior art.

[0005] To solve the above technical problems, according to an aspect of an embodiment of the present application, an electric control box heat dissipation control device is provided, comprising:

[0006] A refrigerant bypass pipeline is connected with the refrigerant circulation pipeline of the air conditioning unit, and is used for bypassing the refrigerant in the refrigerant circulation pipeline.

[0007] A Tesla valve is connected with the refrigerant bypass pipeline, the refrigerant in the refrigerant bypass pipeline flows through the Tesla valve, and the Tesla valve is used for dissipating heat of the electric control box through the refrigerant flowing in the valve body.

[0008] Further, the Tesla valve is located inside the electric control box and is arranged in close contact with the power module of the electric control box.

[0009] Further, it further comprises:

[0010] A four-way valve is connected with the refrigerant bypass pipeline through the Tesla valve, and is used for controlling the Tesla valve to be forward conducted or reverse conducted.

[0011] Further, the first end and the second end of the four-way valve are connected with the refrigerant bypass pipeline respectively, the third end and the fourth end of the four-way valve are connected with the two ends of the Tesla valve respectively, when the first end and the third end of the four-way valve are communicated and the second end and the fourth end are communicated, the Tesla valve is forward conducted, and when the first end and the fourth end of the four-way valve are communicated and the second end and the third end are communicated, the Tesla valve is reverse conducted.

[0012] Further, it further comprises:

[0013] A refrigerant control valve is located on the refrigerant bypass pipeline and is used for adjusting the refrigerant flow of the Tesla valve.

[0014] Further, further comprising:

[0015] The fluorine injection device is located on the refrigerant bypass pipeline and is connected with the refrigerant recovery device.

[0016] Further, further comprising:

[0017] The one-way valve is located on the refrigerant bypass pipeline; one end of the refrigerant bypass pipeline is connected with the outdoor heat exchanger of the air conditioning unit, and the other end is connected with the indoor heat exchanger of the air conditioning unit; and the one-way valve is used to control the refrigerant in the refrigerant bypass pipeline to flow from the refrigerant control valve to the one-way valve.

[0018] According to another aspect of the embodiment of the present application, a heat dissipation control method of an electric control box is provided, which is applied to the heat dissipation control device of the electric control box as described above, and the method comprises:

[0019] detecting a temperature parameter of the electric control box;

[0020] determining a heat dissipation mode of the heat dissipation control device of the electric control box according to the temperature parameter;

[0021] controlling the operation of the Tesla valve and the refrigerant control valve according to the heat dissipation mode.

[0022] Further, the heat dissipation mode at least comprises:

[0023] The first heat dissipation mode, in which the heat dissipation amount of the heat dissipation control device of the electric control box is less than that in the third heat dissipation mode;

[0024] The second heat dissipation mode, in which the heat dissipation control device of the electric control box stops heat dissipation;

[0025] The third heat dissipation mode, in which the heat dissipation amount of the heat dissipation control device of the electric control box is the largest.

[0026] Further, the temperature parameter at least comprises: the ambient temperature of the electric control box and the temperature of the power module; and the determination of the heat dissipation mode of the heat dissipation control device of the electric control box according to the temperature parameter comprises:

[0027] determining whether the ambient temperature of the electric control box is greater than or equal to a first preset temperature;

[0028] If yes, determining that the heat dissipation mode is the first heat dissipation mode; otherwise, further determining whether the temperature of the power module is greater than or equal to a second preset temperature;

[0029] When the temperature of the power module is greater than or equal to the second preset temperature, determining that the heat dissipation mode is the first heat dissipation mode; otherwise, re-detecting the ambient temperature of the electric control box and determining the heat dissipation mode according to the ambient temperature of the electric control box.

[0030] Further, the determination of the heat dissipation mode according to the ambient temperature of the electric control box comprises:

[0031] determining whether the electric control box ring temperature is less than a third preset temperature;

[0032] When the electric control box ring temperature is less than the third preset temperature, determining that the heat dissipation mode is a second heat dissipation mode, otherwise, determining that the heat dissipation mode is a first heat dissipation mode.

[0033] Further, when the electric control box ring temperature is less than the third preset temperature and the heat dissipation mode is the first heat dissipation mode, further comprising:

[0034] detecting the electric control box ring temperature;

[0035] When the electric control box ring temperature is greater than or equal to a preset maximum ring temperature, performing electric control box low temperature abnormality alarm processing.

[0036] Further, when the electric control box ring temperature is greater than or equal to the first preset temperature and the heat dissipation mode is the first heat dissipation mode, further comprising:

[0037] determining whether the power module temperature is greater than or equal to a fourth preset temperature; wherein the fourth preset temperature is greater than the second preset temperature;

[0038] When the power module temperature is greater than or equal to the fourth preset temperature, determining that the heat dissipation mode is a third heat dissipation mode, otherwise, triggering re-detection of the electric control box ring temperature and determining the heat dissipation mode according to the electric control box ring temperature.

[0039] Further, when the power module temperature is greater than or equal to the fourth preset temperature, further comprising:

[0040] re-detecting the electric control box ring temperature and the power module temperature;

[0041] When the electric control box ring temperature is greater than or equal to a preset maximum ring temperature, and / or, the power module temperature is greater than or equal to a preset maximum module temperature, performing electric control box high temperature abnormality alarm processing.

[0042] Further, controlling the operation of the Tesla valve and the refrigerant control valve according to the heat dissipation mode, comprising:

[0043] In the first heat dissipation mode, controlling the Tesla valve to be forward on, the refrigerant control valve to be opened, and the opening degree of the refrigerant control valve to be adjusted in real time according to the temperature parameter;

[0044] In the second heat dissipation mode, controlling the refrigerant control valve to be closed;

[0045] In the third heat dissipation mode, controlling the Tesla valve to be reverse on, the refrigerant control valve to be opened, and the opening degree of the refrigerant control valve to be adjusted in real time according to the temperature parameter.

[0046] Further, in the second heat dissipation mode, further comprising:

[0047] detecting whether the electric control box needs to be overhauled;

[0048] When the maintenance is needed, the fluorine injection device is opened, the refrigerant in the electric control box heat dissipation control device is recovered through the refrigerant recovery device, and then the electric control box is maintained.

[0049] According to another aspect of the embodiment of the present application, an air conditioning unit is provided, which comprises the electric control box heat dissipation control device as described above.

[0050] According to another aspect of the embodiment of the present application, a storage medium containing computer executable instructions is provided, which, when executed by a computer processor, is used to execute the electric control box heat dissipation control method as described above.

[0051] In the present application, an electric control box heat dissipation control scheme using Tesla valve is provided, the Tesla valve is connected with the refrigerant circulation pipeline of the air conditioning unit through the refrigerant bypass pipeline, and the refrigerant in the air conditioning unit is introduced, the Tesla valve is arranged on the refrigerant bypass pipeline, the refrigerant in the refrigerant bypass pipeline flows through the Tesla valve, and the Tesla valve is used to dissipate heat of the electric control box through the refrigerant flowing in the valve body. Since the heat exchange efficiency of the Tesla valve is different in the forward conduction and the reverse conduction, the electric control box can be dissipated through different conduction directions of the Tesla valve, especially in the reverse conduction, high-efficiency heat dissipation is realized, and the problem of poor heat dissipation effect of the electric control box of the air conditioning unit without air cooling is solved, the heat dissipation efficiency of the electric control box is improved, and precise temperature control is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0052] Figure 1 is a kind of optional structure block diagram of electric control box heat dissipation control device and air conditioning unit according to the embodiment of the present application;

[0053] Figure 2 is a kind of optional schematic diagram of electric control box internal structure according to the embodiment of the present application;

[0054] Figure 3 is a kind of optional schematic diagram of the position of Tesla valve according to the embodiment of the present application;

[0055] Figure 4 is a kind of optional flow chart of electric control box heat dissipation control method according to the embodiment of the present application;

[0056] Figure 5 is another kind of optional flow chart of electric control box heat dissipation control method according to the embodiment of the present application. DETAILED DESCRIPTION

[0057] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0058] Example 1

[0059] In a preferred embodiment 1 of the present invention, a heat dissipation control device for an electrical control box is provided. Specifically... Figure 1 This diagram illustrates an optional structure of the electrical control box heat dissipation control device and the air conditioning unit in which it is located, as shown below. Figure 1 As shown, the air conditioning unit includes: a compressor 7, a gas-liquid separator 8, a four-way valve 9, an outdoor heat exchanger 10, an outdoor solenoid valve 12, a switching valve 14, an indoor solenoid valve 13, and an indoor heat exchanger 11. The connection method of the above components is as follows: Figure 1 shown.

[0060] like Figure 1 As shown, the heat dissipation control device for the electrical control box includes:

[0061] Refrigerant bypass line 1 connects to the refrigerant circulation line of the air conditioning unit and is used to bypass the refrigerant in the refrigerant circulation line; the refrigerant circulation line is as follows: Figure 1 The diagram mainly refers to the piping between the outdoor heat exchanger 10 and the indoor heat exchanger 11.

[0062] Tesla valve 2 is connected to refrigerant bypass line 1. The refrigerant in refrigerant bypass line 1 flows through Tesla valve 2. Tesla valve 2 is used to dissipate heat from the electrical control box through the refrigerant flowing in its own valve body.

[0063] This device fully utilizes the characteristics of a Tesla valve, which is a pipe composed of interconnected teardrop-like structures. When fluid flows in from the larger end of the teardrop (forward), although there are two openings, only a small portion of the fluid will choose to take a detour, while the majority of the fluid will still flow along the relatively straight pipe. Thus, the fluid experiences minimal loss and flows at a relatively high speed. However, when fluid flows in from the other end, the situation is reversed. As the fluid flows forward, it encounters a series of bends. The first batch of fluid to take the bends collides with the pipe wall, significantly losing energy. At the next bend, another portion of the fluid also enters, losing energy. When two streams of fluid meet, the collision causes further energy loss. Therefore, the flow rate is low when flowing in the reverse direction.

[0064] Therefore, under the same flow rate, the reverse flow rate slows down, the fluid is disturbed by the structure inside the Tesla valve, and a pressure drop is generated. Although the small pressure drop does not affect the entire pipeline system, it will generate turbulence (the fluid generates irregular flow direction in the micro flow space). According to the calculation relationship between the heat transfer coefficient and the pressure drop, the heat transfer area, and the flow rate, by adjusting the refrigerant control valve of the refrigerant bypass pipeline, the reverse flow is adjusted to the same flow rate as the forward flow. Under the same flow rate, the heat transfer area is the same, but because the reverse flow has a pressure drop, the heat transfer coefficient of the reverse flow is larger than that of the forward flow under the same flow rate, that is, the heat dissipation effect of the reverse flow of the Tesla valve is better than that of the forward flow. The device fully utilizes the reverse turbulence of the Tesla valve to further improve the heat dissipation efficiency.

[0065] Therefore, in the above embodiment, an electric control box heat dissipation control scheme applying a Tesla valve is provided. The refrigerant bypass pipeline is connected with the refrigerant circulation pipeline of the air conditioning unit, and the refrigerant in the air conditioning unit is introduced. A Tesla valve is arranged on the refrigerant bypass pipeline. The refrigerant in the refrigerant bypass pipeline flows through the Tesla valve. The Tesla valve is used for dissipating heat of the electric control box by the refrigerant flowing through the Tesla valve. Because the heat dissipation efficiency of the Tesla valve in the forward conduction and the reverse conduction is different, the electric control box can be dissipated by different conduction directions of the Tesla valve. Especially, the reverse conduction realizes high-efficiency heat dissipation. The high-efficiency heat dissipation can also be realized for the air conditioning unit without air cooling. The problem of poor heat dissipation effect of the electric control box of the air conditioning unit without air cooling is solved. The heat dissipation efficiency of the electric control box is improved, and precise temperature control is achieved.

[0066] In a preferred embodiment of the present application, one end of the refrigerant bypass pipeline 1 is connected with the outdoor heat exchanger of the air conditioning unit, and the other end is connected with the indoor heat exchanger of the air conditioning unit. That is, the refrigerant flowing from the outdoor heat exchanger to the indoor heat exchanger is used for heat exchange. Therefore, a one-way valve 6 is arranged on the refrigerant bypass pipeline 1, which is used for controlling the refrigerant in the refrigerant bypass pipeline 1 to flow from the refrigerant control valve 4 to the one-way valve 6 and preventing the reverse flow of the refrigerant.

[0067] In order to conveniently realize the forward conduction and the reverse conduction of the Tesla valve 2, a four-way valve 3 is arranged in the device. The Tesla valve 2 is connected with the refrigerant bypass pipeline 1 through the four-way valve 3. The four-way valve 3 is used for controlling the forward conduction or the reverse conduction of the Tesla valve 2. In addition to the four-way valve 3, other switch components can also be used to realize the forward conduction or the reverse conduction of the Tesla valve 2, for example, a pipeline for the forward conduction of the Tesla valve 2 is arranged and a switch is arranged on the pipeline. When the forward conduction is needed, the switch is opened. The reverse conduction is the same. Figure 1 In the device, from top to bottom is the forward flow path of the Tesla valve 2, and from bottom to top is the reverse flow path of the Tesla valve 2. The refrigerant flows through the inside of the Tesla valve 2, which can realize rapid heat dissipation and does not need to rely on air cooling. Therefore, the device has great advantages in the air conditioning unit without air cooling such as water source and ground source, and also realizes rapid heat dissipation of the electric control box.

[0068] Used in conjunction with the refrigerant flow direction of refrigerant bypass line 1, the first and second ends of the four-way valve 3 are connected to refrigerant bypass line 1, respectively, and the third and fourth ends of the four-way valve 3 are connected to the two ends of Tesla valve 2, respectively. When the first and third ends of the four-way valve 3 are connected, and the second and fourth ends are connected, Tesla valve 2 is forward-flowing; when the first and fourth ends of the four-way valve 3 are connected, and the second and third ends are connected, Tesla valve 2 is reverse-flowing. The combination of four-way valve 3 and Tesla valve 2 enables the utilization of the reverse turbulent flow and the forward rapid flow of Tesla valve 2.

[0069] Preferably, the device further includes a refrigerant control valve 4, located on the refrigerant bypass line 1, used to regulate the refrigerant flow of the Tesla valve 2. The refrigerant control valve 4 directly controls the refrigerant flow of the refrigerant bypass line 1, further realizing the regulation of the refrigerant flow of the Tesla valve 2. At the same time, the refrigerant control valve 4 can also be completely closed, suitable for applications where the electrical control box does not require heat dissipation.

[0070] like Figure 1 As shown, this device also includes: a refrigerant charging device 5, such as a refrigerant charging nozzle, located on the refrigerant bypass line 1 and connected to the refrigerant recovery device. Using the refrigerant recovery device, the refrigerant charging nozzle is opened to recover the refrigerant from the heat dissipation control device of the electrical control box. After recovery, the refrigerant charging nozzle is closed, and the electrical control box, along with the Tesla valve 2, can be removed for inspection and maintenance. After maintenance, it is reinstalled, thus forming a closed loop of the refrigerant circulation system again.

[0071] In another preferred embodiment of the present invention, the Tesla valve 2 is located inside the electronic control box and is fitted to the power module of the electronic control box. Figure 2 A schematic diagram of the internal structure of the electrical control box is shown, including the power module. Figure 3 A schematic diagram showing the location of the Tesla valve is shown, as follows: Figure 3 As shown, the Tesla valve is mounted on the backplate of the power module, fitting snugly against it to further improve heat dissipation efficiency. Of course, the Tesla valve 2 can also be positioned in other ways, such as near other high-power modules or in the middle of the control box, depending on the internal structure of the control box.

[0072] In addition, to achieve precise temperature control of the control box, temperature sensors can be installed, such as ambient temperature sensors and module temperature sensors. When the ambient temperature of the control box and the temperature of power modules such as the IPM change, the forward and reverse adjustment and closure of the Tesla valve flow path can be controlled to improve the heat dissipation effect and efficiency of the control box. This enables the control box to be fully sealed and can be used in the heat dissipation of the control box in air-cooled air conditioning units with water source and ground source.

[0073] Example 2

[0074] In a preferred embodiment 2 of the present application, a method for controlling heat dissipation of an electric control box is provided, which is applied to the heat dissipation control device of the electric control box in the above-mentioned embodiment 1. Specifically, Figure 4 An optional flow chart of the method is shown in FIG. 4, which includes the following steps S402-S406: Figure 4

[0075] S402: detecting a temperature parameter of the electric control box;

[0076] S404: determining a heat dissipation mode of the heat dissipation control device of the electric control box according to the temperature parameter;

[0077] S406: controlling the operation of the Tesla valve and the refrigerant control valve according to the heat dissipation mode.

[0078] In the above-mentioned embodiments, a heat dissipation control scheme of the electric control box applying the Tesla valve is provided, the Tesla valve is connected with the refrigerant circulation pipeline of the air conditioning unit through the refrigerant bypass pipeline, and the refrigerant in the unit is introduced. The Tesla valve is arranged on the refrigerant bypass pipeline, and the refrigerant in the refrigerant bypass pipeline flows through the Tesla valve. The Tesla valve is used for dissipating heat of the electric control box through the refrigerant flowing in the valve body. Since the heat exchange efficiency of the Tesla valve is different in the forward conduction and the reverse conduction, the electric control box can be cooled through different conduction directions of the Tesla valve, especially in the reverse conduction, high-efficiency heat dissipation is achieved. For the air conditioning unit without air cooling, high-efficiency heat dissipation can also be achieved, effectively solving the problem of poor heat dissipation effect of the electric control box of the air conditioning unit without air cooling, improving the heat dissipation efficiency of the electric control box, and achieving precise temperature control.

[0079] The heat dissipation mode at least includes:

[0080] In the first heat dissipation mode, the heat dissipation amount of the heat dissipation control device of the electric control box is smaller than that in the third heat dissipation mode. In the first heat dissipation mode, the Tesla valve is controlled to be in the forward conduction for rapid heat dissipation, but the heat dissipation amount is smaller than that in the third heat dissipation mode. At the same time, the refrigerant control valve is opened, and the opening degree of the refrigerant control valve is adjusted in real time according to the temperature parameter.

[0081] In the second heat dissipation mode, the heat dissipation control device of the electric control box stops heat dissipation. In the second heat dissipation mode, the refrigerant control valve is controlled to be closed, and no heat dissipation is performed.

[0082] In the third heat dissipation mode, the heat dissipation amount of the heat dissipation control device of the electric control box is the largest, which is greater than that in the first heat dissipation mode. In the third heat dissipation mode, the Tesla valve is controlled to be in the reverse conduction, the refrigerant control valve is opened, and the opening degree of the refrigerant control valve is adjusted in real time according to the temperature parameter. At this time, the Tesla valve is in turbulent flow, and the heat dissipation efficiency is further improved.

[0083] ​In a preferred embodiment of the present application, the temperature parameters at least include: the temperature of the electric control box, the temperature of the power module; the temperature of the electric control box can be replaced by the temperature detected by the temperature sensing package of the inlet and outlet pipes: |T1-T2|, T1 and T2 are the temperatures of the inlet pipe and the outlet pipe respectively. The heat dissipation mode of the electric control box heat dissipation control device is determined according to the temperature parameters, including: judging whether the temperature of the electric control box is greater than or equal to a first preset temperature; if yes, determining that the heat dissipation mode is a first heat dissipation mode, otherwise, further judging whether the temperature of the power module is greater than or equal to a second preset temperature; when the temperature of the power module is greater than or equal to the second preset temperature, determining that the heat dissipation mode is the first heat dissipation mode, otherwise, re-detecting the temperature of the electric control box and determining the heat dissipation mode according to the temperature of the electric control box. When the unit is started to run, first determine whether the temperature of the electric control box is greater than or equal to the first preset temperature, for example Ta℃, if it is, it means that the unit is likely to be in a high-temperature environment and needs to start the first heat dissipation mode immediately; if it is lower than the set temperature Ta℃, it means that the unit may be in a normal or low-temperature working condition and needs to enter the next step of judging the temperature of the IPM module. After the unit runs for a period of time in the normal or low-temperature working condition, the temperature of the module will start to rise with the mainboard working, at this time, it is determined whether the temperature of the power module is greater than or equal to the second preset temperature, for example Tb℃, if it is, the first heat dissipation mode is started; if it is lower than the set temperature Tb℃, the next determination condition is entered.

[0084] Specifically, the heat dissipation mode is determined according to the temperature of the electric control box, including: judging whether the temperature of the electric control box is less than a third preset temperature; when the temperature of the electric control box is less than the third preset temperature, determining that the heat dissipation mode is a second heat dissipation mode, otherwise, determining that the heat dissipation mode is the first heat dissipation mode. When the temperature of the power module is lower than Tb℃, the unit is in a night or sudden temperature drop working condition at this time, but the temperature of the electric control box environment still needs to be re-judged, if the temperature of the electric control box is lower than the third preset temperature, for example Tc℃, it means that the unit is running stably and does not need heat dissipation control, the electronic expansion valve can be closed to enter the second heat dissipation mode; if the temperature of the electric control box is higher than Tc℃, the first heat dissipation mode still needs to be maintained for rapid heat dissipation.

[0085] Further, when the temperature of the electric control box is greater than or equal to the first preset temperature and the heat dissipation mode is the first heat dissipation mode, further including: judging whether the temperature of the power module is greater than or equal to a fourth preset temperature; wherein the fourth preset temperature is greater than the second preset temperature; when the temperature of the power module is greater than or equal to the fourth preset temperature, determining that the heat dissipation mode is a third heat dissipation mode, otherwise, triggering re-detection of the temperature of the electric control box and determining the heat dissipation mode according to the temperature of the electric control box. When in the first heat dissipation mode, it is determined whether the temperature of the power module is greater than or equal to the fourth preset temperature, for example Td℃, if it is, the third heat dissipation mode is entered, that is, when the temperature of the power module rises during operation, the heat dissipation efficiency is further improved, and a Tesla valve reverse turbulent heat dissipation is adopted.

[0086] In addition, when the ring temperature of the electric control box is less than the third preset temperature and the heat dissipation mode is the first heat dissipation mode, the method further comprises: detecting the ring temperature of the electric control box; and when the ring temperature of the electric control box is greater than or equal to the preset maximum ring temperature, performing low-temperature abnormality alarm processing on the electric control box. At this time, the module temperature is low, but the temperature of the electric control box is high, and therefore the low-temperature abnormality alarm processing on the electric control box is performed.

[0087] When the power module temperature is greater than or equal to the fourth preset temperature, the method further comprises: re-detecting the ring temperature of the electric control box and the power module temperature; and when the ring temperature of the electric control box is greater than or equal to the preset maximum ring temperature and / or the power module temperature is greater than or equal to the preset maximum module temperature, performing high-temperature abnormality alarm processing on the electric control box. At this time, the module temperature is high, and the temperature of the electric control box is also high, and therefore the high-temperature abnormality alarm processing on the electric control box is performed.

[0088] In another preferred embodiment of the present application, in the second heat dissipation mode, the method further comprises: detecting whether the electric control box needs to be repaired; and when the electric control box needs to be repaired, controlling the fluorine injection device to be turned on, recovering the refrigerant in the electric control box heat dissipation control device through the refrigerant recovery device, and then repairing the electric control box.

[0089] Through the above control method, different heat dissipation control is implemented for different ring temperatures of the electric control box and different power module temperatures, which not only can realize efficient heat dissipation of the air conditioner unit without air cooling, but also can implement targeted heat dissipation control for the case that the heat dissipation demand is small, so that the heat dissipation efficiency of the electric control box is improved and precise temperature control is achieved.

[0090] In the preferred embodiment 2 of the present application, another electric control box heat dissipation control method is further provided, and specifically, Figure 5 An optional flow chart of the method is shown as Figure 5 The method comprises the following steps S501-S518:

[0091] S501: the unit is running;

[0092] S502: determining whether the ring temperature (the ring temperature of the electric control box) is greater than or equal to Ta℃; if yes, proceeding to step S512, otherwise, proceeding to S503; when the unit is started to run, it is firstly determined whether the ring temperature of the electric control box is greater than or equal to the first preset temperature, for example, Ta℃, if yes, it is indicated that the unit is very likely to be in a high-temperature environment starting condition, and the first heat dissipation mode needs to be started immediately; if less than the set temperature Ta℃, it is indicated that the unit is likely to be in a normal temperature or low-temperature condition, and the next step of determining the IPM module temperature needs to be entered;

[0093] S503: judge whether the mold temperature (power module temperature) is greater than or equal to Tb℃; if yes, go to step S512, otherwise, go to S504; after the unit runs for a period of time at normal or low temperature conditions, the module temperature will start to rise with the mainboard working, at this time, it is determined whether the power module temperature is greater than or equal to the second preset temperature, for example, Tb℃, if it is satisfied, the first cooling mode is started; if it is lower than the set temperature Tb℃, the next determination condition is entered;

[0094] S504: judge whether the ambient temperature is greater than or equal to Tc℃; if yes, go to step S505, otherwise, go to S507; when the power module temperature is lower than Tb℃, at this time, the unit is in night or temperature drop conditions, but the environment temperature of the electronic control box still needs to be re-judged, if the ambient temperature of the electronic control box is lower than the third preset temperature, for example, Tc℃, it indicates that the unit runs stably and does not need cooling control, the electronic expansion valve can be closed to enter the second cooling mode; if the ambient temperature of the electronic control box is higher than Tc℃, the first cooling mode still needs to be maintained for rapid cooling;

[0095] S505: judge whether the ambient temperature is greater than or equal to Tmax, if yes, go to step S506;

[0096] S506: low temperature fire alarm; when the ambient temperature of the electronic control box is greater than or equal to the preset maximum ambient temperature, the low temperature abnormal alarm processing of the electronic control box is performed. At this time, the module temperature is low, but the temperature of the electronic control box is high, so the low temperature abnormal alarm processing of the electronic control box is performed;

[0097] S507: the electronic expansion valve is closed;

[0098] S508: the unit is stopped;

[0099] S509: the fluorine injection nozzle is opened;

[0100] S510: the mainboard is repaired;

[0101] S511: the fluorine injection nozzle is closed; when repair is needed, the fluorine injection device is opened, the refrigerant in the electronic control box cooling control device is recovered through the refrigerant recovery device, and then the electronic control box is repaired;

[0102] S512: the electronic expansion valve is closed, and the four-way valve is in normal direction;

[0103] S513: the electronic expansion valve is opened, and the opening degree is adjusted in real time;

[0104] S514: judge whether the mold temperature is greater than or equal to Td℃; if yes, go to step S514, otherwise, go to S503; when in the first cooling mode, it is determined whether the power module temperature is greater than or equal to the fourth preset temperature, for example, Td℃, if it is satisfied, the third cooling mode is entered, the turbulent cooling is performed, and the cooling efficiency is further improved;

[0105] S515: The electronic expansion valve is closed, and the four-way valve is reversed.

[0106] S516: The electronic expansion valve is opened, and the opening degree is adjusted in real time; then, return to S514.

[0107] S517: The mold temperature and the ambient temperature are greater than the threshold value; the ambient temperature of the electric control box can be greater than or equal to a preset maximum ambient temperature, and / or the temperature of the power module is greater than or equal to a preset maximum mold temperature.

[0108] S518: High-temperature alarm of the unit; when the ambient temperature of the electric control box is greater than or equal to a preset maximum ambient temperature, and / or the temperature of the power module is greater than or equal to a preset maximum mold temperature, the high-temperature abnormal alarm processing of the electric control box is performed. At this time, the temperature of the module is high, and the temperature of the electric control box is also high, so the high-temperature abnormal alarm processing of the electric control box is performed.

[0109] Embodiment 3

[0110] Based on the electric control box heat dissipation control device provided in Embodiment 1, an air conditioning unit is further provided in the preferred Embodiment 3 of the present application, which comprises the electric control box heat dissipation control device as described above, as shown in Figure 1 .

[0111] In the above embodiment, an electric control box heat dissipation control scheme applying a Tesla valve is provided, the Tesla valve is connected with the refrigerant circulation pipeline of the air conditioning unit through a refrigerant bypass pipeline, and the refrigerant in the air conditioning unit is introduced into the Tesla valve. The Tesla valve is used for dissipating heat of the electric control box through the refrigerant flowing in the valve body. Since the heat exchange efficiency of the Tesla valve is different in the forward conduction and the reverse conduction, the electric control box can be cooled through different conduction directions of the Tesla valve, especially in the reverse conduction, high-efficiency heat dissipation is achieved. The problem of poor heat dissipation effect of the electric control box of the air conditioning unit without air cooling is solved, the heat dissipation efficiency of the electric control box is improved, and precise temperature control is achieved.

[0112] Embodiment 4

[0113] Based on the electric control box heat dissipation control method provided in Embodiment 2, a storage medium containing computer executable instructions is further provided in the preferred Embodiment 4 of the present application, the computer executable instructions are used for executing the electric control box heat dissipation control method as described above when executed by a computer processor.

[0114] In the above-mentioned embodiments, the electric control box heat dissipation control scheme using Tesla valve is provided, the refrigerant bypass pipeline is connected with the refrigerant circulation pipeline of the air conditioning unit, the refrigerant in the air conditioning unit is introduced, the Tesla valve is arranged on the refrigerant bypass pipeline, the refrigerant in the refrigerant bypass pipeline flows through the Tesla valve, and the Tesla valve is used for dissipating heat of the electric control box through the refrigerant flowing in the valve body. Since the heat exchange efficiencies of the Tesla valve in forward conduction and reverse conduction are different, the electric control box can be dissipated through different conduction directions of the Tesla valve, especially in reverse conduction, high-efficiency heat dissipation is realized, high-efficiency heat dissipation can also be realized for the air conditioning unit without air cooling, the problem of poor heat dissipation effect of the electric control box of the air conditioning unit without air cooling is effectively solved, the heat dissipation efficiency of the electric control box is improved, and precise temperature control is achieved.

[0115] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0116] It is to be understood that the application is not limited to the precise construction here described and as shown in the drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is to be determined only by the appended claims.

Claims

1. A heat dissipation control device for an electrical control box, characterized in that, include: A refrigerant bypass pipe (1) is connected to the refrigerant circulation pipe of the air conditioning unit and is used to bypass the refrigerant in the refrigerant circulation pipe; Tesla valve (2) is connected to the refrigerant bypass pipe (1). The refrigerant in the refrigerant bypass pipe (1) flows through the Tesla valve (2). The Tesla valve (2) is used to dissipate heat from the electrical control box through the refrigerant flowing in its own valve body. The four-way valve (3) is connected to the refrigerant bypass pipeline (1) through the four-way valve (3). The four-way valve (3) is used to control the forward or reverse flow of the Tesla valve (2).

2. The heat dissipation control device for the electrical control box according to claim 1, characterized in that, The Tesla valve (2) is located inside the electrical control box and is fitted to the power module of the electrical control box.

3. The heat dissipation control device for the electrical control box according to claim 1, characterized in that, The first and second ends of the four-way valve (3) are respectively connected to the refrigerant bypass pipeline (1), and the third and fourth ends of the four-way valve (3) are respectively connected to the two ends of the Tesla valve (2). When the first and third ends of the four-way valve (3) are connected and the second and fourth ends are connected, the Tesla valve (2) is forward-biased. When the first and fourth ends of the four-way valve (3) are connected and the second and third ends are connected, the Tesla valve (2) is reverse-biased.

4. The heat dissipation control device for the electrical control box according to claim 1, characterized in that, Also includes: The refrigerant control valve (4) is located on the refrigerant bypass line (1) and is used to regulate the refrigerant flow of the Tesla valve (2).

5. The heat dissipation control device for the electrical control box according to claim 1, characterized in that, Also includes: The refrigerant injection device (5) is located on the refrigerant bypass pipeline (1) and is connected to the refrigerant recovery device.

6. The heat dissipation control device for the electrical control box according to claim 4, characterized in that, Also includes: A one-way valve (6) is located on the refrigerant bypass line (1); wherein one end of the refrigerant bypass line (1) is connected to the outdoor heat exchanger (10) of the air conditioning unit, and the other end is connected to the indoor heat exchanger (11) of the air conditioning unit. The one-way valve (6) is used to control the refrigerant in the refrigerant bypass line (1) to flow from the refrigerant control valve (4) to the one-way valve (6).

7. A method for controlling the heat dissipation of an electrical control box, applied to the electrical control box heat dissipation control device as described in any one of claims 1-6, characterized in that, The method includes: Detect the temperature parameters of the electrical control box; The heat dissipation mode of the heat dissipation control device of the electrical control box is determined based on the temperature parameters. The operation of the Tesla valve and the refrigerant control valve is controlled according to the heat dissipation mode; wherein, the refrigerant control valve is located on the refrigerant bypass pipeline and is used to regulate the refrigerant flow of the Tesla valve.

8. The method according to claim 7, characterized in that, The heat dissipation modes include at least: In the first heat dissipation mode, the heat dissipation of the heat dissipation control device of the electrical control box is less than that in the third heat dissipation mode. In the second heat dissipation mode, the heat dissipation control device of the electrical control box stops dissipating heat. In the third heat dissipation mode, the heat dissipation of the heat dissipation control device of the electrical control box is maximized.

9. The method according to claim 8, characterized in that, The temperature parameters include at least: ambient temperature of the control box and temperature of the power module; determining the heat dissipation mode of the heat dissipation control device for the control box based on the temperature parameters includes: Determine whether the ambient temperature of the electrical control box is greater than or equal to the first preset temperature; If so, determine that the heat dissipation mode is the first heat dissipation mode; otherwise, further determine whether the power module temperature is greater than or equal to the second preset temperature. When the power module temperature is greater than or equal to the second preset temperature, the heat dissipation mode is determined to be the first heat dissipation mode; otherwise, the ambient temperature of the control box is re-detected, and the heat dissipation mode is determined based on the ambient temperature of the control box.

10. The method according to claim 9, characterized in that, The heat dissipation mode is determined based on the ambient temperature of the electrical control box, including: Determine whether the ambient temperature of the electrical control box is lower than the third preset temperature; When the ambient temperature of the electrical control box is lower than the third preset temperature, the heat dissipation mode is determined to be the second heat dissipation mode; otherwise, the heat dissipation mode is determined to be the first heat dissipation mode.

11. The method according to claim 10, characterized in that, When the ambient temperature of the electrical control box is lower than the third preset temperature and the heat dissipation mode is the first heat dissipation mode, the method further includes: Detect the ambient temperature of the electrical control box; When the ambient temperature of the electrical control box is greater than or equal to the preset maximum ambient temperature, a low temperature abnormality alarm is triggered for the electrical control box.

12. The method according to claim 9, characterized in that, When the ambient temperature of the electrical control box is greater than or equal to the first preset temperature and the heat dissipation mode is the first heat dissipation mode, the method further includes: Determine whether the temperature of the power module is greater than or equal to a fourth preset temperature; wherein the fourth preset temperature is greater than the second preset temperature; When the power module temperature is greater than or equal to the fourth preset temperature, the heat dissipation mode is determined to be the third heat dissipation mode; otherwise, the re-detection of the ambient temperature of the control box is triggered, and the heat dissipation mode is determined based on the ambient temperature of the control box.

13. The method according to claim 12, characterized in that, When the power module temperature is greater than or equal to the fourth preset temperature, the method further includes: The ambient temperature of the control box and the temperature of the power module were re-detected; When the ambient temperature of the control box is greater than or equal to the preset maximum ambient temperature, and / or the temperature of the power module is greater than or equal to the preset maximum module temperature, a high temperature abnormality alarm is triggered for the control box.

14. The method according to claim 8, characterized in that, Controlling the operation of the Tesla valve and refrigerant control valve according to the aforementioned heat dissipation mode includes: In the first heat dissipation mode, the Tesla valve is controlled to be forward-biased, the refrigerant control valve is opened, and the opening degree of the refrigerant control valve is adjusted in real time according to the temperature parameter. In the second heat dissipation mode, the refrigerant control valve is closed; In the third heat dissipation mode, the Tesla valve is controlled to reverse, the refrigerant control valve is opened, and the opening degree of the refrigerant control valve is adjusted in real time according to the temperature parameter.

15. The method according to claim 8, characterized in that, The second heat dissipation mode also includes: Check whether the electrical control box needs maintenance; When maintenance is required, the refrigerant charging device is turned on, and the refrigerant in the heat dissipation control device of the electrical control box is recovered through the refrigerant recovery device, after which the electrical control box is inspected and maintained.

16. An air conditioning unit, characterized in that, Includes the heat dissipation control device for the electrical control box as described in any one of claims 1-6.

17. A storage medium containing computer-executable instructions, characterized in that, The computer-executable instructions, when executed by a computer processor, are used to perform the heat dissipation control method for the electrical control box as described in any one of claims 7 to 15.

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