In-cabinet air conditioning and cooling device and air conditioning and cooling method

Abstract

The invention relates to the technical field of in-cabinet energy-saving temperature control regulation, in particular to an in-cabinet air conditioning and cooling device and an air conditioning and cooling method.The in-cabinet air conditioning and cooling device comprises a shell, a main air duct and an inner air duct which are independent are arranged in the shell, an outer fan is assembled at one end of the main air duct and leads external airflow into a cabinet through the main air duct, and an inner fan is assembled at one end of the inner air duct and leads the external airflow into the cabinet through the inner air duct; the inner fan sends air flow in the cabinet to the directional air supply outlet through the inner air duct to be output. By controlling the flowing speed and direction of air flow, a layered, one-way and ordered flowing process of the air flow is formed in the cabinet, so that heat energy is converted into kinetic energy, a cooling mode with ventilation cooling as a main mode and refrigeration cooling as an auxiliary mode is realized, and the cabinet is safe, efficient, energy-saving and environment-friendly.

Description

Technical Field

[0001] The present invention relates to the technical field of energy-saving temperature control and adjustment in a cabinet, and in particular to an air conditioning and cooling device and an air conditioning and cooling method in a cabinet. Background Art

[0002] The ground cabinet of the outdoor tower communication base station is composed of a power cabinet and a communication cabinet. Taking the general power cabinet with a heat output of 1200W and the communication cabinet with a heat output of 700W as examples, the existing technology adopts the method of installing a cabinet air conditioner on the side of the cabinet, and completely relies on mechanical heat exchange for cooling. In addition, in order to solve the adverse effects of high temperature or direct sunlight in summer and reduce the impact of the climate during extreme high temperature periods on the temperature rise in the cabinet, the power cabinet and the communication cabinet are both provided with a heat insulation layer. The setting of the heat insulation layer brings another problem to the cabinet. When the outside of the cabinet is in a low temperature period, the high temperature in the cabinet cannot be dissipated through the surface of the cabinet, but needs to be completely discharged by mechanical heat exchange through the air conditioner. It is impossible to effectively use the outdoor day and night temperature difference and seasonal temperature difference, which are natural cold sources, to cool the cabinet and dissipate heat, causing the air conditioning compressor to be in continuous working state most of the year. According to statistics, the power cabinet is cooled and cooled for 260 to 360 days a year, and the communication cabinet is cooled and cooled for 220 days a year.

[0003] If the cabinet air conditioner fails and stops cooling during high temperature periods, the temperature inside the cabinet accumulates and forms high temperature, causing the electrical equipment and communication equipment in the cabinet to be damaged and stop working due to the high temperature. This is very fatal to the electrical equipment and communication equipment, and this problem has not been solved so far.

[0004] 60% of the operating costs of base station towers are electricity costs, and the energy consumption used for cooling accounts for a relatively high proportion.

[0005] In addition, long-term operation of the air-conditioning compressor will shorten its service life and increase the cost of inspection and maintenance. Due to the wide distribution of communication towers, this is more obvious in mountainous and remote areas with poor road conditions. Summary of the invention

[0006] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides an air conditioning and cooling device and an air conditioning and cooling method for a cabinet, in which an external fan supplies air into the cabinet, and an internal fan is used to form an internal circulation, assisted by evaporator refrigeration to achieve directional or even fixed-point air supply, and the speed and direction of the air flow can be effectively controlled to form thermal stratification, one-way controllable, orderly convection, and target cooling of the air flow in the cabinet, thereby realizing a cooling mode with ventilation cooling as the main and refrigeration cooling as the auxiliary; and, it has the function of switching to the air supply mode when the compressor fails and can also maintain the normal operation of the equipment in the cabinet. It is safe, efficient, reliable, energy-saving and environmentally friendly. The device of the present invention extends the service life of the cabinet air conditioner by more than twice, and compared with the existing cabinet air conditioner cooling technology, it can reduce energy consumption by more than 85%.

[0007] The technical solution adopted by the present invention is as follows:

[0008] An air conditioning and cooling device for a cabinet comprises a shell, wherein an independent main air duct and an internal air duct are arranged in the shell, an external fan is arranged at one end of the main air duct, and the external fan guides the external air flow into the cabinet through the main air duct, an internal fan is arranged at one end of the internal air duct, and a directional air supply port is arranged at the other end of the internal air duct, and the internal fan sends the air flow in the cabinet to the directional air supply port through the internal air duct for output.

[0009] As a further improvement of the above technical solution:

[0010] The device also includes a refrigeration module, which includes an evaporator, a condenser, and a compressor.

[0011] The main air duct is equipped with a valve plate through an adjusting power mechanism. The valve plate is driven to swing by the adjusting power mechanism, and the air volume entering the cabinet and the condenser is adjusted by the swing amplitude of the valve plate.

[0012] The evaporator is mounted at the directional air supply port.

[0013] The wall surface of the shell is respectively provided with a condenser exhaust port corresponding to the condenser, a compressor air inlet port corresponding to the compressor, a compressor ventilation and heat exhaust port corresponding to the compressor, and a drainage hole for external drainage.

[0014] The outer end of the shell is provided with a main air inlet of the main air duct, an air filter is installed at the main air inlet, and an external sensor is also installed at the main air inlet.

[0015] A board is detachably mounted on the inner end of the shell facing the inside of the cabinet, and a controller and a sensor inside the cabinet are mounted on the board.

[0016] A first guide vane is provided at the air outlet of the main air duct.

[0017] The cabinet air conditioning and cooling device is installed on the cabinet body. The side and / or top surface of the cabinet body is provided with a main air outlet, and a second guide plate is arranged below the main air outlet.

[0018] The cabinet is a power cabinet, in which a rectifier module is placed; the air supply port of the main air duct in the air conditioning and cooling device in the cabinet faces the middle of the rectifier module, the evaporator is located above the internal fan, and the upper air outlet of the evaporator faces the rectifier module horizontally; a small cooling fan is installed at the air inlet of the rectifier module, and / or the upper air outlet of the evaporator is installed with an adjustable directional air guide hood facing the rectifier module.

[0019] The cabinet is a communication cabinet, in which multiple layers of communication machines are placed from bottom to top; the air conditioning and cooling device in the cabinet is installed in the middle and upper part of the cabinet door, and the side and bottom surfaces of the shell inside the cabinet are provided with air supply outlets connected to the main air duct.

[0020] An air conditioning and cooling method for the above-mentioned air conditioning and cooling device in the cabinet comprises the following steps:

[0021] The external fan works, and the external fan introduces the air outside the cabinet into the cabinet through the main air duct, and forms two air flows inside the cabinet;

[0022] The first airflow is blown toward the cooling object in the cabinet through the internal fan and the directional air supply port;

[0023] The second airflow pushes upward, gathers the first airflow after heat exchange, and the hot airflow is discharged out of the cabinet under the joint action of the two airflows.

[0024] The beneficial effects of the present invention are as follows:

[0025] The present invention has a compact and reasonable structure. After the external fan introduces the air outside the cabinet into the cabinet, part of the airflow cooperates with the evaporator under the action of the internal fan to realize directional or even fixed-point air supply, and can effectively control the speed and direction of the airflow flow, so as to form airflow stratification, vector air supply, one-way controllable, target cooling, and orderly flow heat removal in the cabinet. This method can greatly improve the cooling and heat removal efficiency and reduce the refrigeration ventilation volume, and realize a cooling mode with ventilation cooling as the main and refrigeration cooling as the auxiliary. While cooling with low energy consumption, it greatly reduces the continuous use time of the refrigeration equipment. It is safe, efficient, energy-saving and environmentally friendly, and can effectively guarantee and improve the service life of the refrigeration equipment. More importantly, it solves the problem of maintaining the normal operation of the equipment in the cabinet when the compressor fails to stop refrigeration.

[0026] The present invention also includes the following advantages:

[0027] The present invention can effectively utilize the temperature difference between day and night and the temperature difference between seasons. In particular, during low-temperature periods, the cabinet only needs to be cooled by ventilation. After the external low-temperature airflow is introduced into the cabinet, the cabinet is cooled by the directional, layered and orderly flow of the airflow. During high-temperature periods, the cabinet is cooled by a combination of ventilation as the main method and refrigeration as the auxiliary method, which changes the existing method of cooling by completely relying on mechanical heat exchange.

[0028] In the present invention, based on the operation of the internal fan, vector fixed-point air supply is realized for part of the airflow introduced into the cabinet by the operation of the external fan, so as to perform targeted temperature reduction on the heat source in the cabinet; and the directional output airflow has a horizontal and upward flow trend in the cabinet, so that the flow of the airflow in the cabinet is unidirectional and controllable, and the cooling effect is good, which is particularly suitable for cooling the directional air supply target point of the rectifier module and performing layered cooling and heat removal on the communication cabinet;

[0029] The other part of the airflow in the cabinet can directly diffuse horizontally through the bottom of the rectifier module and flow upward. On the one hand, it can cool down independently through the airflow flow, and on the other hand, it can also form an upward push effect on the hot floating airflow above, so that the high-temperature air on the top / upper part of the cabinet does not need to be repeatedly heat exchanged like conventional technology, but can directly overflow from the main exhaust port outside the cabinet with the help of the push. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The cross-sectional view of the air conditioning and cooling device in the cabinet of the present invention Figure 1 .

[0031] Figure 2 It is a rear view of the air conditioning and cooling device in the cabinet of the present invention.

[0032] Figure 3 It is a bottom view of the air conditioning and cooling device in the cabinet of the present invention.

[0033] Figure 4 The cross-sectional view of the air conditioning and cooling device in the cabinet of the present invention Figure 2 .

[0034] Figure 5 It is a schematic diagram of the state of the air conditioning and cooling device in the cabinet of the present invention when it is used in a power cabinet.

[0035] Figure 6 It is a schematic diagram of the state of the cabinet air conditioning and cooling device of the present invention when it is used in a communication cabinet.

[0036] Among them: 1. Shell; 2. External fan; 3. Valve plate; 4. External sensor; 5. Internal fan; 6. Evaporator; 7. Cabinet;

[0037] 11. Main air inlet; 12. Partition; 13. Air filter; 14. Plate;

[0038] 21. Main air duct; 22. First guide vane;

[0039] 31. Adjust the power mechanism;

[0040] 41. Controller; 42. Sensor inside the cabinet;

[0041] 61. Internal air duct; 62. Condenser; 63. Condenser exhaust port; 64. Drain hole; 65. Compressor air inlet hole;

[0042] 71. upper air outlet; 72. side air outlet; 73. second guide vane; 74. cabinet door;

[0043] 81. Rectifier module; 82. Cooling fan; 83. Directional air guide cover; 84. Battery module;

[0044] 91. Communication machine. DETAILED DESCRIPTION

[0045] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0046] like Figure 1-Figure 4 As shown, the cabinet air conditioning and cooling device of this embodiment includes a shell 1, in which an independent main air duct 21 and an internal air duct 61 are arranged. An external fan 2 is installed at one end of the main air duct 21, and the external fan 2 leads the external air flow into the cabinet through the main air duct 21. An internal fan 5 is installed at one end of the internal air duct 61, and a directional air supply port is arranged at the other end of the internal air duct 61. The internal fan 5 sends the air flow in the cabinet through the internal air duct 61 to the directional air supply port for output.

[0047] After the external fan 2 introduces the air outside the cabinet into the cabinet, part of the airflow is directional or even fixed-point air supply through the directional air supply port under the action of the internal fan 5, and the speed and direction of the airflow can be effectively controlled, forming stratified airflow, unidirectional controllable, target point cooling, and orderly flow heat removal in the cabinet; that is:

[0048] In the present embodiment, based on the operation of the internal fan 5, part of the airflow introduced into the cabinet by the operation of the external fan 2 flows independently, and vector fixed-point air supply is realized through the directional air supply port, so that targeted target point cooling is realized by this part of the airflow; and, each of these parts of the airflow has a tendency to flow horizontally and upward in the cabinet, so that the flow of the airflow in the cabinet is unidirectionally controllable, and the cooling effect is good, which is especially suitable for directional air supply target point cooling of the rectifier module 81 in the power cabinet, and layered cooling and heat dissipation of the communication cabinet; the other part of the airflow flows directly horizontally and upward in the cabinet, thereby forming a layered and orderly flow in the cabinet.

[0049] It also includes a refrigeration module, which includes an evaporator 6, a condenser 62 and a compressor.

[0050] The main air duct 21 is equipped with a valve plate 3 through an adjusting power mechanism 31 . The valve plate 3 is driven to swing by the adjusting power mechanism 31 , and the air volume entering the cabinet and the condenser 62 is adjusted by the swing amplitude of the valve plate 3 .

[0051] The evaporator 6 is mounted at the directional air supply port.

[0052] In addition, in this embodiment, after the external fan 2 introduces the air outside the cabinet into the cabinet through the main air duct 21, a part of the air flow is delivered to a fixed point through the action of the internal fan 5. At this time, when the evaporator 6 works in cooling mode, this part of the air flow is converted into cold air.

[0053] In this embodiment, the evaporator 6 and other refrigeration components used therewith, such as the condenser 62, the compressor, etc., can be placed in order in the shell 1. On the one hand, the internal space of the shell 1 is rationally utilized, making the overall structure of the cooling device compact. On the other hand, it is also convenient for the swing of the valve plate 3. Under the cooling condition, the air volume entering the cabinet (through the main air duct 21) and entering the condenser 62 can be synchronously adjusted by the external fan 2.

[0054] In this embodiment, the posture of the valve plate 3 is adjusted by adjusting the operation of the power mechanism 31, so that the ratio of the air volume flowing into the cabinet and entering the condenser 62 can be adjusted, which effectively helps to achieve the adjustable and controllable cooling efficiency and cooling effect, and can also be combined with the speed adjustment of the external fan 2 to adjust the total air volume it inhales.

[0055] The valve plate 3 in this embodiment can be rotatably installed relative to the wall of the main air duct 21 via a rotating structure such as a hinge, and then the posture of the valve plate 3 can be adjusted by pushing or pulling the adjusting power mechanism 31; of course, for the adjusting power mechanism 31, it can be any structural form in the prior art that can realize the swing of the valve plate 3, such as a cylinder with hinged ends, or a motor with a connecting rod mechanism, etc.

[0056] Similar to the refrigeration equipment in the prior art, the refrigeration equipment includes a compressor, a condenser 62 and an evaporator 6, which are interconnected via pipelines to form a circulating refrigeration path, and the refrigerant flows in the circulating refrigeration path. Specifically, the low-temperature and low-pressure refrigerant with a boiling point lower than room temperature absorbs heat in the evaporator 6 and evaporates into gas, so that the air flow in the cabinet flowing through the evaporator 6 is converted into cold air, and the gaseous refrigerant enters the compressor and is compressed into a high-pressure and high-temperature gaseous refrigerant. The high-pressure and high-temperature gaseous refrigerant is sent to the condenser 62, dissipates heat to the outside and becomes a liquid refrigerant, and then the expansion valve converts the liquid refrigerant into a low-temperature and low-pressure state, and the refrigerant returns to the evaporator 6, realizing the circulation of the refrigerant and the refrigeration work of the refrigeration equipment.

[0057] The wall surface of the housing 1 is provided with a condenser exhaust port 63 corresponding to the condenser 62, a compressor air inlet port 65 corresponding to the compressor, a compressor ventilation and heat exhaust port corresponding to the compressor, and a drainage hole 64 for external drainage. Figure 3 As shown, the compressor air inlet 65, the condenser exhaust port 63, and the drain hole 64 can be arranged on the bottom wall of the shell 1; they can also be arranged on other walls of the shell 1, and can be adjusted accordingly according to the layout position of the corresponding equipment inside the shell 1.

[0058] The outer end of the housing 1 is provided with a main air inlet 11 of a main air duct 21, an air filter 13 is provided at the main air inlet 11, and an external sensor 4 is also installed at the main air inlet 11. In this embodiment, the air filter 13 adopts a filter of a composite structure of primary efficiency and medium efficiency, and layered filtration can extend the service life.

[0059] In this embodiment, the main air inlet 11 may correspond to the entire outer side surface of the outer end of the shell 1 , and the shell 1 may be equipped with a hole-type plate to form the main air inlet 11 .

[0060] A plate 14 is detachably mounted on the inner end of the housing 1 facing the inside of the cabinet, and a controller 41 and an in-cabinet sensor 42 are mounted on the plate 14 .

[0061] In this embodiment, the cabinet sensor 42 and the external sensor 4 are both electrically connected to the controller 41, and the controller 41 controls the cooling mode and the air supply volume via the temperature information of the sensor;

[0062] The external sensor 4 is used to detect the temperature outside the cabinet in real time, and is combined with the temperature information of the sensor 42 inside the cabinet to adjust the cooling working mode and regulate the air supply conditions of the external fan 2, the internal fan 5, etc.

[0063] In this embodiment, a partition plate 12 is installed inside the housing 1 , and the partition plate 12 is provided to isolate the main air duct 21 from the inner air duct 61 .

[0064] like Figure 2 As shown, an air inlet for the internal air duct 61 (for the internal fan 5 to take in air) and an upper air outlet for the evaporator 6 to discharge air can be opened on the plate 14 accordingly.

[0065] A first guide vane 22 is mounted at the air outlet of the main air duct 21 .

[0066] The cabinet air conditioning and cooling device of the present invention is suitable for various climate environments, and adopts temperature negative feedback fan temperature control speed regulation, fan step speed change, and temperature controlled constant speed intermittent air supply, supplemented by refrigeration ventilation and cooling to save energy and reduce consumption.

[0067] The cabinet air conditioning and cooling device of the present invention can effectively utilize the temperature difference between day and night and the temperature difference between seasons. Especially in the low temperature period, it only needs to use ventilation and cooling method. After the external low-temperature airflow is introduced into the cabinet, the cabinet is cooled by the directional, layered and orderly flow of the airflow. In the high temperature period, the cabinet is cooled by a combination of ventilation and refrigeration, which changes the existing cooling method that relies on complete mechanical heat exchange.

[0068] The directional and layered cooling structure and cooling mode in the cabinet of the present invention can be matched and set in a targeted manner according to different equipment, different heating points, and heat dissipation requirements in the cabinet, thereby meeting different cooling requirements in the cabinet, with high flexibility in use and outstanding cooling effect.

[0069] like Figure 1-Figure 6 As shown, the cabinet air conditioning and cooling device of this embodiment is installed on the cabinet body 7, and the side and / or top surface of the cabinet body 7 are equipped with a total exhaust port, that is, an upper exhaust port 71 opened on the top wall surface of the cabinet body 7 and a side exhaust port 72 opened on the upper side wall surface of the cabinet body 7, which can be selected according to the cabinet structure;

[0070] A second guide plate 73 is arranged below the main exhaust port. The cabinet body 7 includes a cabinet door 74, the cabinet air conditioning and cooling device can be installed on the cabinet door 74, the side exhaust port 72 can be arranged on the cabinet door 74, the second guide plate 73 can be arranged on the inner side of the cabinet door 74 between the cabinet air conditioning and cooling device and the main exhaust port, and the second guide plate 73 can also be arranged on the equipment in the cabinet.

[0071] In this embodiment, the second guide plate 73 is provided to suppress the downward suction of the upper hot air flow in the cabinet, and the second guide plate 73 is used to effectively isolate the upper exhaust hot air flow and the lower cold air flow, thereby effectively preventing the reduction of the cooling effect in the cabinet.

[0072] In this embodiment, the main exhaust port can be set on the top surface of the cabinet 7 (i.e., the upper exhaust port 71), which is convenient for the air flow in the cabinet to be discharged outward from the upper part of the cabinet 7, and can accelerate the discharge of the hot floating air flow.

[0073] The main exhaust vent can also be set on the side cabinet door 74 (i.e., the side exhaust vent 72), taking into account the influence of external factors such as rain. Of course, the upper exhaust vent 71 can also be equipped with other external structures to prevent the influence of factors such as rain.

[0074] In this embodiment, the cabinet 7 is a base station tower equipment cabinet, including a power cabinet and a communication cabinet; wherein,

[0075] When the cabinet 7 is a power cabinet, a rectifier module 81 is placed inside the power cabinet; the air supply port of the main air duct 21 in the air conditioning and cooling device in the cabinet faces the middle of the rectifier module 81, the evaporator 6 is located above the internal fan 5, and the upper air outlet of the evaporator 6 is horizontally facing the rectifier module 81; the rectifier module 81 is equipped with a cooling fan 82 at the air inlet, and / or the upper air outlet of the evaporator 6 is installed with an adjustable directional air guide cover 83 facing the rectifier module 81.

[0076] In the power cabinet of this embodiment, the upper air outlet of the evaporator 6 is arranged directly facing the rectifier module 81, so that the wind sent by the evaporator 6 can achieve directional target temperature reduction on the rectifier module 81, effectively ensuring the rapid, efficient and reliable temperature reduction of the rectifier module 81 with a large heat generation, and preventing the upper / top part of the power cabinet from overheating due to the rectifier module 81 and affecting the normal use of the battery module 84 below;

[0077] At the same time, the air supply port of the main air duct 21 is set below the rectifier module 81, so that the air flow inside the cabinet outside the internal circulation can directly flow horizontally and upward through the bottom of the rectifier module 81. On the one hand, it can be cooled independently through the flow, and on the other hand, it can also form an upward push effect on the hot floating airflow generated by the internal circulation above.

[0078] In this embodiment, the provision of the cooling fan 82 or the directional air guide hood 83 effectively ensures that the wind sent out from the evaporator 6 can efficiently flow into the rectifier module 81, effectively ensuring the cooling efficiency and cooling effect of the cold air entering the rectifier module 81 with the lowest temperature.

[0079] When the cabinet 7 is a communication cabinet, multiple layers of communication machines 91 are placed in the communication cabinet from bottom to top; the air conditioning and cooling device in the cabinet is installed at the upper middle part / top of the cabinet door 74 of the communication cabinet, and the side and bottom surfaces of the shell 1 located inside the cabinet 7 are provided with air supply ports connected to the main air duct 21, so that the air flow flowing into the cabinet from the main air duct 21 presents different downward and horizontal forms, thereby realizing synchronous layered cooling of the communication machines 91 in the entire communication cabinet by the flow of air; the evaporator 6 in the air conditioning and cooling device in the cabinet is arranged below the internal fan 5.

[0080] In actual use, due to the differences in internal equipment and heat generation structures of power cabinets and communication cabinets, the air conditioning and cooling devices in the cabinets are adaptively adjusted to meet different cabinet cooling requirements to meet cabinet cooling needs.

[0081] This embodiment also provides an air conditioning and cooling method for an air conditioning and cooling device in a cabinet, including a ventilation and cooling mode, and a ventilation and refrigeration combined cooling mode, by switching between the modes, effectively ensuring that the temperature inside the cabinet is within a preset range;

[0082] In the ventilation and cooling mode, the air conditioning and cooling method of the cabinet air conditioning and cooling device of this embodiment includes the following steps:

[0083] When the temperature inside the cabinet reaches the ventilation and cooling setting value, the external fan 2 starts working, and the external fan 2 introduces the air outside the cabinet into the cabinet through the main air duct 21, and forms two air flows inside the cabinet;

[0084] The first airflow passes through the inner fan 5 and the directional air outlet and blows toward the cooling object in the cabinet; in a preferred embodiment, the inner fan 5 can work simultaneously with the outer fan 2;

[0085] The second airflow pushes upwards and gathers the first airflow after heat exchange. Under the joint action of the two airflows, the hot airflow is quickly discharged out of the cabinet. The two airflows are discharged through the corresponding cabinet outlets (corresponding to the upper outlet 71 and / or the side outlet 72).

[0086] The two airflows work together to move the hot rising air in the cabinet toward the air outlet outside the cabinet (corresponding to the upper air outlet 71 and / or the side air outlet 72) in a unidirectional, controllable and orderly flow to dissipate heat;

[0087] When the temperature inside the cabinet is below the ventilation and cooling set value, it means that there is no need for refrigeration and cooling in the cabinet, and the cooling device does not need to work.

[0088] For the power cabinet, Figure 5 As shown, the airflow delivered by the directional air supply port is facing the rectifier module 81. Under the operation of the cooling fan 82 or in combination with the directional air guide cover 83, the airflow delivered by the directional air supply port is directional and flows into the air intake of the cooling fan 82 set in the rectifier module 81, and performs directional flow, thereby achieving target point cooling at the rectifier module 81.

[0089] For communication cabinets, Figure 6 As shown, the airflow sent out from the directional air supply port diffuses horizontally through the interlayer intervals of the communication machine 91, and finally flows upward to be discharged through the main exhaust port.

[0090] The ventilation and refrigeration combined cooling mode is mainly a combination of ventilation as the main and refrigeration as the auxiliary. This mode includes the following steps:

[0091] During the ventilation and cooling process, if the temperature in the cabinet exceeds the refrigeration set value, auxiliary refrigeration is started; the regulating power mechanism 31 pushes the valve plate 3, and the flow is diverted through the valve plate 3, and the working external fan 2 simultaneously supplies air to the main air duct 21 and the condenser 62; the airflow flowing into the cabinet through the main air duct 21 is divided into two streams, one of which is cooled by the evaporator 6 and blows out cold air under the action of the internal fan 5, and the other airflow located below the cold air directly fills the low-temperature negative pressure area at the bottom of the hot air flow in the cabinet, which helps the hot air flow to flow upward in the cabinet, and the outdoor fresh air and refrigeration work together to cool down. Under normal circumstances, no condensed water will be generated in this auxiliary refrigeration state. The advantage is that the condensed water can be prevented from taking away the cold and reducing the cooling efficiency; if condensed water is generated, a water pipe can be set to lead the condensed water to the upper part / top air duct of the air inlet of the condenser 62. This method is beneficial to improving the heat exchange efficiency of the condenser 62.

[0092] For the power cabinet, when the evaporator 6 is working, the cold air sent by the evaporator 6 and flowing into the rectifier module 81 can achieve effective target cooling of the rectifier module 81. At the same time, the remaining airflow in the cabinet is located below the cold air. During the respective flow and cooling processes, the cold air will also be pushed upward to participate in heat exchange.

[0093] The way to switch from the ventilation-based cooling-assisted combined mode to the ventilation-cooling mode is:

[0094] When the temperature inside the cabinet drops to the set value and the external environment also drops to the set value under the compressor cooling state, the compressor is turned off and the natural ventilation cooling state is restored; until the temperature inside the cabinet rises to the set value, the compressor is turned on again to assist in cooling and cooling.

[0095] When the compressor fails, the controller 41 cuts off the power supply of the compressor and switches to the ventilation and cooling mode to ventilate and cool the cabinet to maintain normal operation of the equipment, thereby avoiding damage to the equipment caused by high temperature in the cabinet due to lack of cooling.

[0096] In this embodiment, the airflow acted upon by the internal fan 5, compared with the other airflow introduced into the cabinet through the main air duct 21, both flow horizontally and upward in a layered manner with weak forced convection and strong natural convection, making full use of the thermal energy generated by heat to convert into kinetic energy. The airflow below also exerts an upward push on the upper hot rising airflow, thereby achieving efficient cooling and heat dissipation.

[0097] Through the cooling mode of natural convection and ventilation cooling as the main and refrigeration cooling as the auxiliary in the cabinet air conditioning and cooling device of the present invention, the cooling mode of ventilation cooling can reach 85%-90% of the cooling period of the whole year, and auxiliary refrigeration is required during the high temperature period; while in the existing technology that completely relies on mechanical heat exchange for cooling, it is necessary to turn on the air conditioning refrigeration mode when the outdoor temperature is above 15°C. As described in the background technology, the power cabinet and communication cabinet are refrigerated and cooled for 220 days or more per year; therefore, the cabinet air conditioning and cooling device of the present invention, its designed air inlet and exhaust port structure and heat exchange airflow form, utilize the thermal buoyancy lift generated by the heating element in the cabinet to drive the external cold air flowing into the main air duct to fill the lower negative pressure zone in the cabinet to achieve natural convection ventilation cooling, and natural convection is used for outdoor ambient temperature below 30°C without turning on the fan.

[0098] The present invention adopts a cooling solution combining three technical measures: natural convection, fan air supply, and auxiliary refrigeration and cooling. Taking the use in Jiangsu Province as an example, this method reduces energy consumption by 90% compared with cabinet air conditioners, greatly reduces energy consumption, and simultaneously ensures and extends the life of refrigeration equipment.

[0099] The present invention realizes a cooling mode with ventilation cooling as the main and refrigeration cooling as the auxiliary. While cooling with low energy consumption, it greatly reduces the continuous use time of the refrigeration equipment and greatly increases the service life of the auxiliary refrigeration equipment. When the refrigeration equipment fails to cool down during high temperature periods, it can also maintain the communication industry standard cabinet temperature of 45°C to ensure the normal operation of the equipment. The major accident risk of burning communication equipment due to cooling failure has been solved, and safety, high efficiency, energy saving and environmental protection have been truly realized.

[0100] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. An air conditioning and cooling device in a cabinet, characterized in that: The cabinet comprises a housing (1), wherein an independent main air duct (21) and an internal air duct (61) are arranged in the housing (1); an external fan (2) is mounted at one end of the main air duct (21), and the external fan (2) guides external air flow into the cabinet through the main air duct (21); an internal fan (5) is mounted at one end of the internal air duct (61), and a directional air supply port is arranged at the other end of the internal air duct (61); the internal fan (5) sends the air flow in the cabinet to the directional air supply port through the internal air duct (61) for output.

2. The cabinet air conditioning and cooling device according to claim 1, characterized in that: It also includes a refrigeration module, which includes an evaporator (6), a condenser (62) and a compressor.

3. The cabinet air conditioning and cooling device according to claim 2, characterized in that: A valve plate (3) is installed at the main air duct (21) through an adjusting power mechanism (31). The valve plate (3) is driven to swing by the adjusting power mechanism (31), and the amount of air entering the cabinet and the condenser (62) is adjusted by the swing amplitude of the valve plate (3).

4. The cabinet air conditioning and cooling device according to claim 2, characterized in that: The evaporator (6) is mounted at the directional air supply port.

5. The cabinet air conditioning and cooling device according to claim 2, characterized in that: The wall surface of the shell (1) is respectively provided with a condenser exhaust port (63) corresponding to the condenser (62), a compressor air inlet port (65) corresponding to the compressor, a compressor ventilation and heat exhaust port corresponding to the compressor, and a drainage hole (64) for external drainage.

6. The cabinet air conditioning and cooling device according to claim 1, characterized in that: The outer end of the shell (1) is provided with a main air inlet (11) of a main air duct (21), an air filter (13) is installed at the main air inlet (11), and an external sensor (4) is also installed at the main air inlet (11).

7. The cabinet air conditioning and cooling device according to claim 1, characterized in that: A plate (14) is detachably mounted on the inner end of the housing (1) facing the inside of the cabinet, and a controller (41) and an in-cabinet sensor (42) are mounted on the plate (14).

8. The cabinet air conditioning and cooling device according to claim 1, characterized in that: A first guide plate (22) is provided at the air outlet of the main air duct (21).

9. The cabinet air conditioning and cooling device according to claim 1, characterized in that: The cabinet air conditioning and cooling device is installed on the cabinet body (7), and the side and / or top surface of the cabinet body (7) is provided with a main air outlet, and a second guide plate (73) is arranged below the main air outlet.

10. The cabinet air conditioning and cooling device according to claim 9, characterized in that: The cabinet (7) is a power cabinet, and a rectifier module (81) is placed inside the power cabinet; the air supply port of the main air duct (21) in the air conditioning and cooling device in the cabinet faces the middle of the rectifier module (81), the evaporator (6) is located above the internal fan (5), and the upper air outlet of the evaporator (6) is horizontally facing the rectifier module (81); the air inlet of the rectifier module (81) is equipped with a small cooling fan (82), and / or the upper air outlet of the evaporator (6) is installed with an adjustable directional air guide cover (83) facing the rectifier module (81).

11. The cabinet air conditioning and cooling device according to claim 9, characterized in that: The cabinet (7) is a communication cabinet, in which multiple layers of communication machines (91) are placed at intervals from bottom to top; the air conditioning and cooling device in the cabinet is installed in the middle and upper part of the cabinet door (74) of the communication cabinet, and the side and bottom surfaces of the shell (1) located inside the cabinet (7) are both provided with air supply ports that are connected to the main air duct (21).

12. An air conditioning and cooling method for the air conditioning and cooling device in a cabinet according to claim 1, characterized in that: The steps include: The external fan (2) works, and the external fan (2) introduces the air outside the cabinet into the cabinet through the main air duct (21), and forms two air flows in the cabinet; The first airflow is blown toward the cooling object in the cabinet through the internal fan (5) and the directional air supply port; The second airflow pushes upward, gathers the first airflow after heat exchange, and the hot airflow is discharged out of the cabinet under the joint action of the two airflows.

Images