Cooling and humidity control device for control cubicle

Abstract

The utility model relates to a cooling and humidity control device for a control cubicle, which comprises a shell arranged on a cubicle body, an outer air inducing assembly and an inner air inducing assembly are arranged in the shell, the outer air inducing assembly comprises a main air duct, and the inner air inducing assembly comprises an inner air duct; when the main air duct is communicated with the inner air duct, the outer air guide assembly drives external airflow to enter the cabinet through the main air duct and the inner air duct in sequence; when the main air duct is isolated from the inner air duct, the inner air inducing assembly drives airflow in the cabinet to be directionally blown to equipment in the cabinet through the inner air duct. Vector air supply can be achieved in the control cubicle, the temperature difference between the upper portion and the lower portion in the control cubicle can be automatically adjusted in real time, ventilation cooling and humidity control are achieved, condensation is effectively prevented, and the control cubicle is safe, reliable, energy-saving and environmentally friendly.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment cabinet cooling, in particular to a temperature and humidity control device for a control cabinet. Background Art

[0002] An intelligent control cabinet is an online monitoring system cabinet developed by using advanced detection technology, control technology and communication technology. It is usually applied in a GIS room and used in supporting with an SF6 switch. The control cabinet uses a PLC (programmable master controller) to conduct on-line monitoring and control of the enclosed combined electrical appliances, and uses a CPU (microprocessor) to conduct data processing and control, networking and communication with the automation system of the central control room. The electronic and electrical equipment in the control cabinet is arranged in layers, and the CPU therein generates a very large amount of heat.

[0003] The control cabinet has strict temperature and humidity control requirements. In the prior art, a cabinet air conditioner is used for cooling, but the energy consumption is large. Since the air conditioner cannot meet the humidity control requirements in the cabinet, a dehumidification device is additionally installed in the cabinet; in order to eliminate the condensed water generated by the air conditioner and the dehumidification device, an electric heating water vapor evaporator is additionally installed. The superimposed single-function devices including the air conditioner, the dehumidification device and the electric heating water vapor evaporator are contradictory, unscientific, high in energy consumption and unreasonable; especially, a large temperature difference is formed between the high temperature generated by the CPU and the secondary equipment layer in the cabinet, which easily causes condensation of the PLC secondary equipment and results in malfunction. Summary of the Utility Model

[0004] The applicant of the present utility model aims at the above-mentioned defects in the existing production technology and provides a temperature and humidity control device for a control cabinet, which can vectorially supply air in the control cabinet, and can automatically adjust the upper and lower temperature difference in the control cabinet in real time, so as to realize ventilation and cooling, auxiliary refrigeration and humidity control in the cabinet, thereby effectively preventing the generation of condensation, and being safe, reliable, energy-saving and environment-friendly.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A temperature and humidity control device for a control cabinet includes a housing installed on a cabinet body. An external air induction component and an internal air induction component are arranged inside the housing. The external air induction component includes a main air duct, and the internal air induction component includes an internal air duct;

[0007] When the main air duct is communicated with the internal air duct, the external air induction component drives external air flow to enter the cabinet through the main air duct and the internal air duct in sequence; when the main air duct is isolated from the internal air duct, the internal air induction component drives the air flow in the cabinet to be directionally blown to the equipment in the cabinet through the internal air duct.

[0008] As a further improvement of the above technical scheme:

[0009] It further includes a return air component, and the upper and lower internal circulation of the air in the cabinet is realized through the return air component.

[0010] The return air assembly includes a return air duct. One end of the return air duct is provided with a return air inlet, and the other end is provided with a return air supply outlet. A return air fan is installed in the return air duct. The return air fan draws the air inside the cabinet into the return air duct through the return air inlet, and then blows it towards the lower side inside the cabinet through the return air supply outlet, thereby realizing the up-and-down circulation of the air inside the cabinet.

[0011] A valve plate is installed at the main air duct through an adjusting power mechanism. The valve plate is driven by the adjusting power mechanism to swing, so as to connect or isolate the main air duct from the inner air duct.

[0012] It further includes a refrigeration assembly, which includes an evaporator, a condenser and a compressor.

[0013] The condensed water generated by the evaporator is led to the external air guiding assembly through a condensate pipe, and is sent into the condenser through the air supply of the external air guiding assembly.

[0014] The main air duct is equipped with an external fan. One end of the main air duct is provided with a main air inlet, and the other end is provided with a bypass air supply outlet;

[0015] When the main air duct is isolated from the inner air duct, the external air flow is sent into the cabinet through the bypass air supply outlet.

[0016] The inner air duct is equipped with an inner fan. One end of the inner air duct is provided with an inner air inlet, and the other end is provided with an inner air supply outlet.

[0017] An induction device for detecting temperature difference is installed inside the cabinet. The induction device includes an upper sensor and a lower sensor arranged at intervals from top to bottom.

[0018] Air outlets are arranged on the side and / or top surface of the cabinet, and a deflector is arranged below the air outlets.

[0019] The beneficial effects of the present utility model are as follows:

[0020] The structure of the present utility model is compact and reasonable, and it is convenient to operate. By setting multiple fans and corresponding air ducts, air inlets and air supply outlets, and by adding auxiliary refrigeration and cooling, the internal temperature and humidity environment of the substation control cabinet can be adjusted in real time, the layer temperature difference inside the substation control cabinet can be reduced in real time, and condensation inside it can be effectively prevented, thereby realizing the functions of high-efficiency energy saving, safety and reliability in temperature control and humidity control.

[0021] The present utility model also has the following advantages:

[0022] After the external fan of the utility model introduces the air outside the cabinet into the cabinet, by realizing directional or even fixed-point air supply, and being able to effectively control the speed and direction of the air flow, it realizes vector air supply, one-way controllability, stratified target cooling, and orderly flow of heat to the outside of the cabinet. This method can greatly improve the heat dissipation and exhaust efficiency and reduce the refrigeration ventilation volume. With the cooling mode mainly based on ventilation and supplemented by refrigeration, while achieving low-energy cooling, it greatly reduces the continuous use time of the refrigeration equipment, is safe, efficient, energy-saving and environmentally friendly, and effectively guarantees the extension of the service life of the refrigeration equipment. More importantly, it solves the urgent problem that when the compressor fails and stops refrigerating, the equipment inside the cabinet can still operate normally through the ventilation cooling mode.

[0023] The utility model can effectively utilize the temperature difference between day and night and the seasonal temperature difference. Especially in the low-temperature period, only by means of ventilation cooling, after introducing the external low-temperature air flow into the cabinet, the air flow in the cabinet is used for cooling through directional, stratified and orderly flow. While in the high-temperature period, the combination of mainly refrigeration and supplemented by ventilation is used to cool the inside of the cabinet, changing the existing cooling method that relies entirely on mechanical heat exchange.

[0024] In the utility model, based on the operation of the internal fan, vector fixed-point air supply is realized for part of the air flow introduced into the cabinet by the operation of the external fan, so as to target the heat source inside the cabinet for target cooling. And, the directionally output air flow shows a horizontal and upward flow trend in the cabinet, making the flow direction of the air flow inside the cabinet controllable and having a good cooling effect. Another part of the air flow inside the cabinet flows upward. On the one hand, it is cooled independently through the flow, and on the other hand, it can also form an upward pushing effect on the hot floating air flow above, so that the high-temperature air at the top of the cabinet does not need to repeat heat exchange like the conventional technology. The hot floating air flow directly overflows outdoors from the air outlet under the pushing assistance.

[0025] In the utility model, by setting an internal circulation air duct, an internal circulation fan and an internal circulation air supply port, the return air flow is pressed into the lower space inside the switch cabinet, constituting the internal air flow circulation of the switch cabinet, so as to achieve the temperature and humidity balance inside the switch cabinet and solve the condensation problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a cross-sectional view of the utility model.

[0027] Figure 2 is the front view of the temperature control and humidity control device in an embodiment of the utility model.

[0028] Figure 3 is the front view of the temperature control and humidity control device in another embodiment of the utility model.

[0029] Figure 4 is the rear view of the temperature control and humidity control device in the utility model.

[0030] Figure 5 This is the bottom view of the temperature and humidity control device in the present utility model.

[0031] Figure 6 This is a schematic diagram of the present utility model in the working state Figure 1 .

[0032] Figure 7 This is a schematic diagram of the present utility model in the working state Figure 2 .

[0033] Wherein: 1, main air duct; 2, inner air duct; 3, return air duct; 4, external sensor; 5, housing; 6, valve plate; 7, cabinet body; 8, evaporator; 9, condenser;

[0034] 11, external fan; 12, main air inlet; 13, bypass air supply outlet;

[0035] 21, inner fan; 22, inner air inlet; 23, inner air supply outlet

[0036] 31, return air fan; 32, return air inlet; 33, return air supply outlet;

[0037] 41, controller; 42, internal sensor;

[0038] 51, plate; 52, partition board; 53, condenser air discharge outlet; 54, compressor air inlet hole; 55, air filter;

[0039] 61, adjustment power mechanism;

[0040] 71, top air outlet; 72, side air outlet; 73, upper air outlet; 74, upper sensor; 75, lower sensor; 76, deflector; 77, cabinet door;

[0041] 81, condensate pipe. Specific embodiments

[0042] The following will describe the specific embodiments of the present utility model with reference to the accompanying drawings.

[0043] As Figures 1 - 6 shown, the temperature and humidity control device for the control cabinet in this embodiment includes a housing 5 installed on the cabinet body 7. An external air induction component and an internal air induction component are arranged inside the housing 5. The external air induction component includes a main air duct 1, and the internal air induction component includes an inner air duct 2. When the main air duct 1 is communicated with the inner air duct 2, the external air induction component drives the external air flow to enter the cabinet sequentially through the main air duct 1 and the inner air duct 2. When the main air duct 1 is isolated from the inner air duct 2, the internal air induction component drives the air flow in the cabinet to be blown to the equipment in the cabinet directionally through the inner air duct 2.

[0044] The cabinet body 7 includes a cabinet door 77. The temperature and humidity control device is usually installed on the side wall surface of the cabinet body 7 opposite to the cabinet door 77,

[0045] Inside the cabinet body 7, a sensing device for detecting temperature difference is installed. The sensing device includes an upper sensor 74 and a lower sensor 75 arranged at intervals from top to bottom. The upper sensor 74 is used to detect the temperature and humidity above the internal space of the temperature reduction and humidity control device for the switch control cabinet, and the lower sensor 75 is used to detect the temperature and humidity below the internal space of the temperature reduction and humidity control device for the switch control cabinet.

[0046] According to different usage scenarios of the switch control cabinet, there are three different exhaust positions: the top, the upper part, and the side. Air outlets are provided on the side and / or the top surface of the cabinet body 7, corresponding to the top air outlet 71 and the side air outlet 72 respectively, which is convenient for the hot exchange air flow inside the cabinet to be discharged outwards from the upper part of the cabinet body 7.

[0047] In addition, as Figure 7 shown, the top air outlet 71 can also be provided with an external structure such as a top cover to prevent the influence of factors such as rain. An upper air outlet 73 is provided on the top cover, so that the air flow inside the cabinet can be discharged out of the cabinet through the top air outlet 71 and the upper air outlet 73 in sequence.

[0048] In addition, the top air outlet 71 can also be provided with other external structures to prevent the influence of factors such as rain.

[0049] A flow guide plate 76 is arranged below the air outlet. In this embodiment, a flow guide plate 76 is arranged below the side air outlet 72, which is used to inhibit the upward and downward entrainment of the hot air flow in the upper part of the cabinet and reduce the temperature reduction effect inside the cabinet, and isolate the hot air flow about to be discharged above the flow guide plate 76 from the cold air flow below. The flow guide plate 76 is arranged horizontally and can be fixed on the inner wall surface of the cabinet body 7 or on the equipment inside the cabinet.

[0050] As Figure 6 shown, a PLC module (located in the upper layer) and a CPU module (located in the lower layer) are arranged in the switch control cabinet. Among them, the PLC module generates a large amount of heat. Therefore, the air outlet of the evaporator 8 (corresponding to the internal air supply port 23 in the present invention) is directly facing the PLC module, which is convenient for timely cooling the PLC module. In addition, due to the uneven heat generation of the PLC module and the CPU module, a return air component is added in the temperature reduction and humidity control device, which can realize the up and down circulation of the air inside the switch control cabinet to achieve temperature and humidity balance and prevent the PLC module from generating condensation.

[0051] It also includes a return air component, and the up and down internal circulation of the air inside the cabinet is realized through the return air component.

[0052] The return air assembly includes a return air duct 3. One end of the return air duct 3 is provided with a return air inlet 32, and the other end is provided with a return air supply outlet 33. A return air fan 31 is installed in the return air duct 3. The return air fan 31 draws the air inside the cabinet 7 into the return air duct 3 through the return air inlet 32, and then blows it towards the lower side inside the cabinet 7 through the return air supply outlet 33, thereby realizing the up and down circulation of the air inside the cabinet 7.

[0053] In this embodiment, the main air duct 1 and the return air duct are independent of each other, and the inner air duct 2 and the return air duct are independent of each other. The main air duct 1 and the inner air duct 2 are separated by a valve plate 6.

[0054] The external air intake assembly includes a main air duct 1 and an external fan 11. The main air duct 1 is equipped with an external fan 11. One end of the main air duct 1 is provided with a main air inlet 12, and the other end is provided with a bypass air supply outlet 13. When the main air duct 1 is isolated from the inner air duct 2, the external air flow is sent into the cabinet through the bypass air supply outlet 13. The external air intake assembly is used to introduce external air flow into the cabinet. Specifically, when the valve plate 6 is fully opened, the external fan 11 drives the external air flow to pass through the main air duct 1 and the inner air duct 2 in sequence, and then is sent into the cabinet from the inner air supply outlet 23 and the inner air inlet 22. When the valve plate 6 is fully closed, the external fan 11 drives the external air flow through the main air duct 1. Then, a part of the air flow is sent into the condenser 9, and the other part of the air flow is sent into the cabinet from the bypass air supply outlet 13.

[0055] The internal air intake assembly includes an inner air duct 2 and an internal fan 21. The inner air duct 2 is equipped with an internal fan 21. One end of the inner air duct 2 is provided with an inner air inlet 22, and the other end is provided with an inner air supply outlet 23. The internal fan 21 sends the air flow inside the cabinet through the inner air duct 2 to the inner air supply outlet 23 for output.

[0056] As Figure 4 shown, a plate 51 is detachably installed at the inner end of the housing 5 facing the cabinet. A controller 41 and an internal sensor 42 are installed on the plate 51. In this embodiment, the internal sensor 42 and the external sensor 4 are both electrically connected to the controller 41. The controller 41 controls the cooling mode and the air supply volume according to the temperature information of the sensors.

[0057] The external sensor 4 is used to detect the temperature outside the cabinet in real time. Combined with the temperature information of the internal sensor 42, it adjusts the cooling working mode and regulates the air supply conditions of the external fan 11, the internal fan 21, etc.

[0058] In this embodiment, a partition 52 is installed inside the housing 5 to isolate the main air duct 1 and the inner air duct 2. An opening corresponding to the valve plate 6 is provided on the partition 52.

[0059] As Figure 5As shown, corresponding inner air inlets 22 for the inner blower 21 to draw air into the inner air duct 2, inner air outlets 23 for the inner air duct 2 to supply air into the cabinet, and bypass air outlets 13 for the main air duct 1 to supply air into the cabinet can be formed on the board 51; the bypass air outlets 13 can be formed on the board 51 and located above the inner air outlets 23.

[0060] At the outer end of the housing 5, there is a main air inlet 12 of the main air duct 1. The outer blower 11 is arranged at the main air inlet 12. An air filter 55 is installed at the main air inlet 12, and an external sensor 4 is also installed at the main air inlet 12. In this embodiment, the air filter 55 adopts a filter with a primary and medium - effect composite structure, and the layered filtration can extend the service life.

[0061] In this embodiment, as Figures 3 - 4 shown, the housing 5 can be equipped with a perforated plate to form the main air inlet 12; in addition, the condenser air outlet 53 of the condenser 9 is also arranged at the outer end of the housing 5. As Figure 3 shown, the hole groups corresponding to the main air inlet 12 and the condenser air outlet 53 can be arranged at intervals, or, as Figure 4 shown, the hole groups corresponding to the main air inlet 12 and the condenser air outlet 53 can cover the entire outer side surface of the outer end of the housing 5.

[0062] At the main air duct 1, a valve plate 6 is installed through an adjusting power mechanism 61. The valve plate 6 is driven by the adjusting power mechanism 61 to swing, so as to connect or isolate the main air duct 1 and the inner air duct 2. When the valve plate 6 completely closes the opening on the partition plate 52 (that is, the valve plate 6 is in the fully closed state), the main air duct 1 and the inner air duct 2 are isolated; when the valve plate 6 leaves the opening on the partition plate 52 (that is, the valve plate 6 is in the open state), the main air duct 1 and the inner air duct 2 are connected.

[0063] The valve plate 6 in this embodiment can be rotatably installed relative to the wall surface of the main air duct 1 through a rotating structure such as a hinge, and then the attitude adjustment of the valve plate 6 is realized by the push or pull of the adjusting power mechanism 61; of course, for the adjusting power mechanism 61, it can be any structural form in the prior art that can realize the swing of the valve plate 6, such as a cylinder hinged at both ends, or a motor cooperating with a connecting rod mechanism, etc.

[0064] After the outer blower 11 introduces the air outside the cabinet into the cabinet, directional or even fixed - point air supply is realized through the inner air outlet 23, and the speed and direction of the air flow can be effectively controlled, forming a layered, unidirectional controllable, target - point cooling, and orderly flowing heat - discharging air flow in the cabinet; that is:

[0065] In this embodiment, when in the refrigeration state, the internal air blower 21 sucks the air inside the cabinet into the internal air duct 2, and then sends the refrigerated air into the cabinet through the evaporator 8. While implementing the internal circulation cooling of the cold air, the external air blower 11 sends the external air into the cabinet through the bypass air supply opening 13 via the main air duct 1. The air flow entering the cabinet through the bypass air supply opening 13 directly discharges the hot air at the upper part of the cabinet out of the cabinet through the top air outlet 71 and / or the side air outlet 72. The discharged hot air does not need to participate in the repeated mechanical heat exchange, and this method can reduce the power consumption of the refrigeration equipment configuration and further save the energy consumption required for cooling; other part of the air flow participates in the heat exchange of the condenser.

[0066] It further includes a refrigeration component, and the refrigeration component includes an evaporator 8, a condenser 9 and a compressor; the evaporator 8 is installed at the internal air supply opening 23.

[0067] In this embodiment, the evaporator 8 and other refrigeration components used in conjunction with it, such as the condenser 9, the compressor, etc., can be orderly placed in the housing 5. On the one hand, it realizes the reasonable utilization of the internal space of the housing 5, making the overall structure of the cooling device compact, and on the other hand, it is also convenient for the swing of the valve plate 6.

[0068] Similar to the refrigeration equipment in the prior art, the refrigeration equipment includes a compressor, a condenser 9 and an evaporator 8, which are interconnected through pipelines to form a circulating refrigeration path, and the refrigerant flows in the circulating refrigeration path. Specifically: the refrigerant with low temperature and low pressure and a boiling point lower than normal temperature absorbs heat and evaporates into a gas in the evaporator 8, so that the air flow inside the cabinet flowing through the evaporator 8 is converted into cold air. 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 into the condenser 9, 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. The refrigerant returns to the evaporator 8 again, realizing the circulating flow of the refrigerant and the refrigeration work of the refrigeration equipment.

[0069] The condensed water generated by the evaporator 8 is led to the external air guiding component through the condensate pipe 81, and is sent into the condenser 9 through the air supply and evaporation of the external air guiding component. Specifically, the condensed water generated by the evaporator 8 is led to the main air inlet 12 through the condensate pipe 81, and is sent into the condenser 9 by the external air blower 11 through the air supply and evaporation.

[0070] Condenser air outlet 53 corresponding to the condenser 9, compressor air inlet hole 54 corresponding to the compressor, compressor ventilation and heat dissipation outlet corresponding to the compressor, and drainage hole for external drainage are respectively opened on the wall surface of the housing 5. The compressor air inlet hole 54, the condenser air outlet 53, and the drainage hole can be arranged on the bottom wall surface of the housing 5; they can also be arranged on other wall surfaces of the housing 5, and can be adjusted accordingly according to the layout position of the corresponding equipment inside the housing 5.

[0071] The temperature reduction and humidity control device in this utility model is applicable to various regions with different climate environments. It adopts an energy-saving and consumption-reducing method that combines temperature negative feedback for the fan to control the speed, multi-speed operation of the fan, and temperature-controlled constant-speed intermittent air supply, supplemented by refrigeration and ventilation for temperature reduction.

[0072] This utility model can effectively utilize the temperature difference between day and night and the temperature difference during seasonal changes. Especially during low-temperature periods, only through the ventilation and cooling method, after introducing the external low-temperature air flow into the cabinet, the air flow in the cabinet is directed, stratified, and orderly flowing to reduce the temperature. While during high-temperature periods, the cabinet is cooled by combining auxiliary refrigeration and ventilation and cooling, changing the existing method of relying solely on mechanical heat exchange for cooling.

[0073] Due to the directional and stratified temperature reduction structure and mode in the cabinet of this utility model, it can be specifically configured according to different equipment, different heat generation points, and heat dissipation requirements in the cabinet, so as to meet different temperature reduction needs in the cabinet, with high flexibility in use and outstanding temperature reduction effect.

[0074] The working process of this utility model is as follows:

[0075] It includes a ventilation and cooling mode, a combined ventilation and refrigeration cooling mode, and a humidity control mode. By switching between these modes, it effectively ensures that the internal temperature of the cabinet is within the preset range;

[0076] In the ventilation and cooling mode, it includes the following steps:

[0077] When the temperature in the cabinet is greater than or equal to the ventilation and cooling set value, turn on the external fan 11 and fully open the valve plate 6 by adjusting the power mechanism 61, so that the main air duct 1 is connected to the internal air duct 2;

[0078] The external fan 11 drives the air outside the cabinet to enter the internal air duct 2 through the main air duct 1, and then blows towards the heat-generating equipment in the cabinet through the internal air inlet 22 and the internal air supply outlet 23;

[0079] Thus, ventilation and cooling are carried out through the external air induction module 3 and the internal air induction module 5;

[0080] When the temperature in the cabinet is less than the ventilation and cooling set value, it means that the cabinet does not need to be cooled, and at this time the cooling device does not need to work.

[0081] In the combined ventilation and refrigeration cooling mode, it includes the following steps:

[0082] During the process of ventilation and cooling, if the temperature in the cabinet is greater than or equal to the refrigeration set value, then start auxiliary refrigeration;

[0083] Turn on the compressor and push the valve plate 6 to close completely by adjusting the power mechanism 61, so as to separate the internal air duct 2 from the main air duct 1;

[0084] The external fan 11 starts, introducing the air outside the cabinet into the main air duct 1. A part of the air flow in the main air duct 1 participates in heat exchange through the condenser 9, and the other part directly enters the cabinet through the bypass air supply opening 13;

[0085] The internal fan 21 starts, introducing the air inside the cabinet into the internal air duct 2 through the internal air inlet 22, and then blowing it out from the internal air supply opening 23 through the evaporator 8 and blowing towards the PLC module;

[0086] The condensed water generated by the evaporator 8 is led to the total air inlet 12 by the condensate pipe 81 and sent into the condenser 9 by the external fan 11 through the air supply diffuser; it helps to improve the heat exchange efficiency of the condenser and solves the problem of condensate water discharge;

[0087] In addition, in the state of compressor refrigeration, if the temperature inside the cabinet drops to the set value and the external environment also drops to the set value at the same time, 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 restarted to assist in refrigeration and cooling.

[0088] When the compressor fails, the main controller cuts off the power supply of the compressor and converts it into a ventilation cooling mode to ventilate and cool the inside of the cabinet to maintain the normal operation of the equipment, avoiding equipment failure caused by high temperature inside the cabinet due to lack of cooling and damage to components.

[0089] In this embodiment, by arranging the bypass air supply opening 13 at a relatively upper position, the air flow introduced into the cabinet through the main air duct 1 can directly drive the hot air above the inside of the switchgear control cabinet to overflow out of the cabinet through the air outlet without mechanical heat exchange, which can reduce the configuration power of the refrigeration equipment and save energy;

[0090] In the humidity control mode, the following steps are included:

[0091] When the temperature difference between the upper sensor 74 and the lower sensor 75 > 5°C, the return air fan 31 is turned on; when the temperature difference between the upper sensor 74 and the lower sensor 75 < 3°C, the return air fan 31 is turned off, so that the humidity control value in the temperature reduction and humidity control device for the switchgear control cabinet < 75%, the temperature difference ≯ 3°C, (the industry regulation is that the upper and lower temperature difference ≯ 10°C), the upper and lower temperatures inside the cabinet are balanced, and no cold surface is formed on the surface of the CPU, fundamentally eliminating the hidden danger of condensation on the CPU equipment.

[0092] The configuration power of the auxiliary refrigeration compressor of the temperature reduction and humidity control device is reduced by 30% compared with the compressor configuration power of the air-conditioning cabinet.

[0093] By adopting a cooling mode mainly based on ventilation cooling and supplemented by refrigeration cooling, 85% of the annual cooling period can be covered, and for the remaining 15% of the cooling period, differential temperature control intermittent auxiliary refrigeration is required; in the existing technology that completely relies on mechanical heat exchange for cooling, when the external temperature is above 15°C, the air-conditioning refrigeration mode needs to be turned on. As described in the background technology, the cooling of the centralized control cabinet reaches 220 days or more per year. Therefore, for the cooling and humidity control device of the present utility model, the designed inlet and outlet structures and the heat exchange air flow pattern make full use of the thermal buoyancy generated by the heating elements in the cabinet to drive the natural convection ventilation cooling by filling the lower negative pressure area in the cabinet with the cold air flowing into the main air duct from the outside. When the outdoor environmental temperature is below 28°C, the fan does not need to be turned on. By combining three technical measures of natural convection, fan air supply, and auxiliary refrigeration cooling, the energy consumption is greatly reduced, and at the same time, the service life of the refrigeration equipment is guaranteed and extended synchronously.

[0094] The present utility model realizes a cooling mode mainly based on ventilation cooling and supplemented by refrigeration cooling. While achieving low-energy consumption cooling, it greatly reduces the continuous use time of the refrigeration equipment, significantly improves the service life of the auxiliary refrigeration equipment, and can also control the temperature in the cabinet within a range where the temperature difference from the outside of the cabinet is not more than 3°C when the refrigeration equipment fails to cool down during high-temperature periods, ensuring the normal operation of the equipment, solving the biggest potential accident hazard of burning communication equipment due to cooling failure, and truly realizing safety, high efficiency, energy conservation, and environmental protection.

[0095] The above description is an explanation of the present utility model, not a limitation of the utility model. For the scope defined by the present utility model, refer to the claims. Any form of modification can be made within the protection scope of the present utility model.

Claims

1. A temperature and humidity control device for a control cubicle, characterized in that: It includes a housing (5) installed on a cabinet body (7), and an external air induction component and an internal air induction component are arranged inside the housing (5). The external air induction component includes a main air duct (1), and the internal air induction component includes an internal air duct (2). When the main air duct (1) is communicated with the internal air duct (2), the external air induction component drives external air flow to enter the cabinet successively through the main air duct (1) and the internal air duct (2); when the main air duct (1) is isolated from the internal air duct (2), the internal air induction component drives the air flow inside the cabinet to be blown to the equipment inside the cabinet directionally through the internal air duct (2).

2. The temperature and humidity control device for the control cabinet of HSBC as claimed in claim 1, characterized in that: It further includes a return air component, and the up-and-down internal circulation of the air inside the cabinet is realized through the return air component.

3. The temperature and humidity control device for the HSBC control cabinet according to claim 2, characterized in that: The return air component includes a return air duct (3). One end of the return air duct (3) is provided with a return air inlet (32), and the other end of the return air duct (3) is provided with a return air supply outlet (33). A return air fan (31) is installed in the return air duct (3). The return air fan (31) introduces the air inside the cabinet body (7) into the return air duct (3) through the return air inlet (32), and then blows it towards the lower side inside the cabinet body (7) through the return air supply outlet (33), so as to realize the up-and-down circulation of the air inside the cabinet body (7).

4. The temperature and humidity control device for the control cabinet of HSBC Holdings PLC as described in claim 1, characterized in that: A valve plate (6) is installed at the main air duct (1) through an adjusting power mechanism (61). The valve plate (6) is driven by the adjusting power mechanism (61) to swing, so that the main air duct (1) is communicated with or isolated from the internal air duct (2).

5. The temperature-lowering and humidity-controlling device for the control cabinet of HSBC Holdings plc as described in claim 1, wherein: It further includes a refrigeration component, and the refrigeration component includes an evaporator (8), a condenser (9) and a compressor.

6. The temperature reduction and humidity control device for a control cabinet as claimed in claim 5, wherein: The condensed water generated by the evaporator (8) is led to the external air induction component through a condensate pipe (81), and is sent into the condenser (9) through the air supply of the external air induction component.

7. The temperature-lowering and humidity-controlling device for the control cabinet of HSBC as claimed in claim 1, wherein: The main air duct (1) is provided with an external fan (11). One end of the main air duct (1) is provided with a main air inlet (12), and the other end of the main air duct (1) is provided with a bypass air supply outlet (13). When the main air duct (1) is isolated from the internal air duct (2), the external air flow is sent into the cabinet through the bypass air supply outlet (13).

8. The temperature and humidity control device for the control cabinet of HSBC, characterized in that: The internal air duct (2) is provided with an internal fan (21). One end of the internal air duct (2) is provided with an internal air inlet (22), and the other end of the internal air duct (2) is provided with an internal air supply outlet (23).

9. The temperature and humidity control device for the control cabinet of HSBC Holdings PLC according to claim 1, wherein: An induction device for detecting temperature difference is installed inside the cabinet body (7), and the induction device includes an upper sensor (74) and a lower sensor (75) which are arranged at intervals from top to bottom.

10. The temperature and humidity control device for the control cabinet of HSBC Holdings plc as claimed in claim 1, wherein: Air outlets are arranged on the side surface and / or the top surface of the cabinet body (7), and a flow guide plate (76) is arranged below the air outlets.

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