An electric cabinet air conditioner device that prevents condensate from being blown out

Abstract

The present invention discloses an electric cabinet air conditioner device for preventing condensate water from being blown out, which includes a scroll compressor. The output end of the scroll compressor is sequentially connected to an air-cooled condenser and a liquid storage tank. The output end of the liquid storage tank is connected to a first three-way valve. The first three-way valve is connected to the input end of an expansion valve, and the first three-way valve is also connected to the input end of a bypass solenoid valve. The output end of the bypass solenoid valve is connected to a second three-way valve. The output end of the expansion valve is connected to the input end of an evaporator. The output end of the evaporator is connected to the input end of an evaporator pressure regulating valve. The output end of the evaporator pressure regulating valve is connected to the second three-way valve. The second three-way valve is also connected to the scroll compressor. A temperature sensor, a humidity sensor, and an electric heater are respectively arranged at the evaporator. The temperature sensor, the humidity sensor, the scroll compressor, an evaporation fan, and the bypass solenoid valve are respectively electrically connected to a control box. The present invention solves the problem that ordinary air conditioner devices in the prior art are prone to condensate water.

Description

Technical Field

[0001] The present invention relates to the field of air conditioning equipment for electrical cabinets, and particularly to an electrical cabinet air conditioner that prevents condensation water from being blown out. Background Art

[0002] At present, more and more electrical automatic control devices are widely used in all aspects of people's lives. When the environmental temperature is high and the humidity is relatively large, the temperature of electrical equipment and components will rise and the insulation will decline, causing equipment failures and even threatening the safety of personnel. It is necessary to dissipate heat and cool down the electrical equipment. When general refrigeration equipment works, condensation water will be blown out due to the decrease in air temperature, resulting in a decrease in the safety of electrical equipment. In order to ensure the safe and normal operation of electrical equipment, an electrical cabinet air conditioner that prevents condensation water from being blown out is needed to provide dry and cold air with low humidity to the electrical equipment cabinet, while the air supply of general air conditioning equipment is difficult to meet the requirements of both temperature and humidity at the same time. Summary of the Invention

[0003] The purpose of the present invention is to provide an electrical cabinet air conditioner that prevents condensation water from being blown out, and to provide dry and cold air with low humidity for heat dissipation of the electrical cabinet accommodating electrical equipment, so as to solve the problem that the low-temperature air output by existing ordinary air conditioning equipment will blow out condensation water.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] An electrical cabinet air conditioner that prevents condensation water from being blown out includes a scroll compressor, an air-cooled condenser and its configured condensation fan, a liquid storage tank, an expansion valve, an evaporator and its configured evaporation fan, and also includes an electric heater, an evaporator pressure regulating valve, a bypass solenoid valve, a first three-way valve, a second three-way valve, a temperature sensor, a humidity sensor, and a control box; the output end of the scroll compressor is connected to the input end of the air-cooled condenser through a pipeline, the output end of the air-cooled condenser is connected to the input end of the liquid storage tank through a pipeline, the output end of the liquid storage tank is connected to one valve port of the first three-way valve through a pipeline, another valve port of the first three-way valve is connected to the input end of the expansion valve through a pipeline, the third valve port of the first three-way valve is connected to the input end of the bypass solenoid valve through a pipeline, the output end of the bypass solenoid valve is connected to one valve port of the second three-way valve through a pipeline, the output end of the expansion valve is connected to the input end of the evaporator through a pipeline, the output end of the evaporator is connected to the input end of the evaporator pressure regulating valve through a pipeline, the output end of the evaporator pressure regulating valve is connected to another valve port of the second three-way valve through a pipeline, and the third valve port of the second three-way valve is connected to the input end of the scroll compressor through a pipeline; the temperature sensor, the humidity sensor, and the electric heater are respectively arranged at the evaporator, the temperature sensor and the humidity sensor are electrically connected to the control box through signal transmission, and the control box is also electrically connected to the scroll compressor, the evaporation fan, the bypass solenoid valve, and the electric heater for control.

[0006] Further, a drying filter and a sight glass are successively connected in series in the pipeline between the output end of the liquid storage tank and the corresponding valve port of the first three-way valve.

[0007] Further, a capillary tube is connected in the pipeline between the output end of the bypass electromagnetic valve and the corresponding valve port of the second three-way valve.

[0008] Further, a low-pressure pressure switch is installed in parallel in the pipeline between the output end of the evaporator and the input end of the evaporator pressure regulating valve, and the low-pressure pressure switch is electrically connected to the control box for signal transmission.

[0009] Further, a high-pressure pressure switch and an exhaust temperature sensor are connected in parallel in the pipeline between the output end of the scroll compressor and the input end of the air-cooled condenser, and the exhaust temperature sensor and the high-pressure pressure switch are respectively electrically connected to the control box for signal transmission.

[0010] Further, the condensing fan is configured with a condensing fan speed regulator. A pipeline is branched from the output end of the air-cooled condenser and connected to the condensing fan RGE speed regulator. The condensing fan RGE speed regulator checks the condensing pressure. The condensing fan circuit is connected through the condensing fan RGE speed regulator. When the pressure changes, PWM regulation is performed on the condensing fan to control the rotation speed of the condensing fan to adjust the condensing pressure.

[0011] Advantages of the present invention: The present invention provides an electric cabinet air conditioner device that prevents the blowing out of condensed water. Through this device, low-humidity cold air is provided for the electrical equipment control cabinet, and no condensed water will be blown out, meeting the requirements of electrical equipment for heat dissipation and humidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the structural schematic diagram of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] The present invention will be further described below in conjunction with the drawings and embodiments.

[0014] As Figure 1As shown in the figure, an electric cabinet air conditioner device for preventing condensate from being blown out according to the present invention includes a scroll compressor 1 of model ZR24K3-TFD, an exhaust temperature sensor 2 of model PT-100, a high-pressure pressure switch 3 of model YK-2.6 / 2.0, a condensing fan 4 of model YSWF74L47P4-470B-400, a condensing fan speed regulator 5 of model RGE-X3R4-7, an air-cooled condenser 6, a liquid storage tank 7 of model TZ.07.01.02, a dryer filter 8 of model DCL084S, a sight glass 9 of model SGI12S, a first three-way valve 10, an expansion valve 11 of model TEX2, a bypass solenoid valve 12 of model EVR3, a capillary tube 13, a second three-way valve 14, an evaporator pressure regulating valve 15 of model KVP22, a low-pressure pressure switch 16 of model YK-0.02 / 0.1, an evaporator 17, an evaporator fan 18 of model DDW9-60№2.5CSI, which is a three-speed adjustable fan, an electric heater 19 of model DRG-50S01WD01, a temperature sensor 20 of model PT-100, a humidity sensor 21 of model HM1500LF, and a control box 22.

[0015] The output end of the scroll compressor 1 is connected to the input end of the condenser 6 through a pipeline. A branch is separated from the output pipeline of the condenser 6 and connected to the condensing fan speed regulator 5. The RGE speed regulator of the condensing fan checks the condensing pressure, and the condensing fan circuit is connected through the RGE speed regulator of the condensing fan. When the pressure changes, PWM regulation is performed on the condensing fan to control the rotation speed of the condensing fan to adjust the condensing pressure. Another branch is separated from the output pipeline of the condenser 6 and connected to the input end of the liquid storage tank 7. The output end of the liquid storage tank 7 is connected to the input end of the dryer filter 8. The output end of the dryer filter 8 is connected to the input end of the sight glass 9 through a pipeline. A branch of the output end of the sight glass 9 is connected to one valve port of the first three-way valve 10. Another valve port of the first three-way valve 10 is connected to the input end of the bypass solenoid valve 12. The output end of the bypass solenoid valve 12 is connected to the input end of the capillary tube 13. The input end of the capillary tube 13 is connected to one valve port of the second three-way valve 14. Another valve port of the second three-way valve 14 is connected to the input end of the scroll compressor 1.

[0016] The third valve port of the first three-way valve 10 is connected to the input end of the expansion valve 11. The output end of the expansion valve 11 is connected to the input end of the evaporator 17. The output end of the evaporator 17 is connected to the input end of the evaporator pressure regulating valve 15. The output end of the evaporator pressure regulating valve 15 is connected to the third valve port of the second three-way valve 14.

[0017] An exhaust temperature sensor 2 and a high-pressure pressure switch 3 are installed in the pipeline between the scroll compressor 1 and the condenser 6, which can protect the system against high-pressure and exhaust temperature.

[0018] A condensation fan 4 is installed at the air outlet of the air-cooled condenser 6. The condensation fan speed regulation 5 adjusts the rotation speed of the condensation fan 4 to keep the condensation pressure at a constant value, preventing the condensation pressure from being too low when the ambient temperature is relatively low.

[0019] The evaporator pressure valve 15 keeps the evaporation pressure at a certain value, so that the surface temperature of the evaporator 17 is above 0 °C and there is no condensation.

[0020] When the exhaust temperature is higher than the set temperature, the bypass solenoid valve 12 is turned on, and the liquid refrigerant is throttled and cooled through the capillary 13 and returns to the scroll compressor 1 to reduce the exhaust temperature of the compressor.

[0021] An electric heater 19, a temperature sensor 20, and a humidity sensor 21 are provided at the evaporator 17. The control box 22 controls the start and stop of the scroll compressor 1 according to the temperature sensed by the temperature sensor 20, controls the start and stop of the electric heater 19 according to the humidity of the humidity sensor 21, and controls the speed regulation of the evaporation fan 18 according to the requirements of refrigeration and dehumidification.

[0022] The control box 22 of the present invention is composed of a single-chip microcomputer JKT, a manual operation panel SP for human-machine operation, a circuit breaker of model EX9BN 3P D25, an AC contactor of model EX9C 1811 3P 220V, a thermal overload relay of model EX9R38, and a voltage protector of model EX9JP-8, and is used to receive the measured temperature, humidity, and protection signals in the system and realize the control of the system.

[0023] The specific working process of the present invention is as follows:

[0024] When the equipment is working, after the unit is powered on, an on command is given through the manual operation panel SP on the control box 22. First, the outlet air temperature Te (20 °C) and humidity Th (60%) are set according to the user's requirements, and various protection parameters such as current and exhaust temperature are set. After power-on, the evaporation fan 18 is first started to run at high speed. After a delay of 1 minute, the supply air temperature T is detected. When the supply air temperature T is within the following range Te - ΔT ≤ T ≤ Te + ΔT, the system is in ventilation. When the supply air temperature T > Te + ΔT, the scroll compressor 1 is started, and the system enters the cooling and refrigeration mode and keeps the scroll compressor 1 working all the time. When it is detected that the supply air temperature T < Te - ΔT, the compressor 1 stops. When the supply air humidity Rh > 60%, the electric heater 19 is started, and the evaporation fan 18 runs at low speed, and the system enters the heating and dehumidification mode. When the supply air humidity Rh < 40%, the electric heater 19 is stopped, and the evaporation fan 18 switches to high-speed operation.

[0025] When the condensation pressure P ≤ 13 KG / cm², the condensation fan speed regulator 5 detects the condensation pressure and reduces the speed of the condensation fan 4 to the lowest or stops it. When the condensation pressure P ≥ 18 KG / cm², it increases the speed of the condensation fan 4 to the maximum. When the high and low pressure protection occurs in the system high pressure switch 3 and the low pressure switch 16, the system alarms and stops the operation of the scroll compressor 1, and the evaporation fan 18 continues to supply air. When the temperature of the exhaust temperature sensor 2 ≥ 105 °C, it alarms, the bypass solenoid valve 12 is turned on, the liquid refrigerant is throttled and cooled through the capillary tube 13, and returns to the scroll compressor 1 to reduce the exhaust temperature of the compressor. When the temperature of the exhaust temperature sensor 2 ≤ 90 °C, the bypass solenoid valve 12 is closed.

[0026] When the evaporation pressure P ≥ 0.2 MP, the evaporator pressure regulating valve 15 is gradually adjusted larger. When the evaporation pressure P ≤ 0.2 MP, the evaporator pressure regulating valve 15 is gradually adjusted smaller, so that the evaporation pressure P ≥ 0.2 MP, and the evaporation temperature of the system refrigerant R134a is above 0 °C, preventing condensed water from being blown out of the evaporator.

[0027] The control box 22 is composed of a single-chip microcomputer JKT, a manual operation board SP for human-machine operation, a circuit breaker, an AC contactor, a thermal overload relay, and a voltage protector. It measures the temperature sensor 20, the humidity sensor 21, the high pressure switch 3 and the low pressure switch 16 protection signals to control the operation of the unit. If the user needs remote control, the R422 communication line can be used to connect to the unit controller to control and modify the operation parameters of the unit.

[0028] Generally speaking, the present invention measures the temperature of the temperature sensor 20 at the air outlet of the device, feeds back the temperature T of the air outlet temperature sensor 20 to the controller, compares the air outlet temperature T with the set value Te. When the temperature sensed by the temperature sensor is higher than the set value, the controller gives a signal to start the refrigeration operation of the scroll compressor 1; when the air outlet temperature is lower than the set value Te - ΔT, the controller gives a signal and the compressor 1 stops working. It measures the humidity of the humidity sensor 21 at the air outlet of the device, compares the air outlet humidity Rh with the set value Rhe. When Rh > 60%, the electric heater 19 is started. When the supply air humidity Rh < 40%, the electric heater 19 is stopped. The condensation fan speed regulator 5 detects the condensation pressure and adjusts the speed of the condensation fan 4 to ensure that the condensation pressure is the set value. The evaporation pressure value is automatically adjusted through the evaporator pressure regulating valve 15, so that no condensation occurs on the surface of the evaporator, and no water is blown out from the air supply of an electric cabinet air conditioner device that prevents condensed water from being blown out.

[0029] The above embodiments only describe the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements of the technical solutions of the present invention by those of ordinary skill in the art should fall within the protection scope determined by the claims of the present invention.

Claims

1. An electric cabinet air conditioner device for preventing condensate from being blown out, comprising a scroll compressor, an air-cooled condenser and its configured condensation fan, a liquid storage tank, an expansion valve, an evaporator and its configured evaporation fan, Characterized in that: It further includes an electric heater, an evaporator pressure regulating valve, a bypass solenoid valve, a first three-way valve, a second three-way valve, a temperature sensor, a humidity sensor, and a control box; the output end of the scroll compressor is connected to the input end of the air-cooled condenser through a pipeline, the output end of the air-cooled condenser is connected to the input end of the liquid storage tank through a pipeline, the output end of the liquid storage tank is connected to one valve port of the first three-way valve through a pipeline, another valve port of the first three-way valve is connected to the input end of the expansion valve through a pipeline, the third valve port of the first three-way valve is connected to the input end of the bypass solenoid valve through a pipeline, the output end of the bypass solenoid valve is connected to one valve port of the second three-way valve through a pipeline, the output end of the expansion valve is connected to the input end of the evaporator through a pipeline, the output end of the evaporator is connected to the input end of the evaporator pressure regulating valve through a pipeline, the output end of the evaporator pressure regulating valve is connected to another valve port of the second three-way valve through a pipeline, and the third valve port of the second three-way valve is connected to the input end of the scroll compressor through a pipeline; the temperature sensor, the humidity sensor, and the electric heater are respectively arranged at the evaporator, the temperature sensor and the humidity sensor are respectively electrically connected to the control box for signal transmission, and the control box is also respectively electrically connected to the scroll compressor, the evaporation fan, the bypass solenoid valve, and the electric heater for control; A drying filter and a sight glass are sequentially connected in series in the pipeline between the output end of the liquid storage tank and the corresponding valve port of the first three-way valve; The condensation fan is configured with a condensation fan speed regulator. A pipeline is bypassed from the output end of the air-cooled condenser and connected to the RGE speed regulator of the condensation fan. The RGE speed regulator of the condensation fan checks the condensation pressure, and the condensation fan circuit is connected through the RGE speed regulator of the condensation fan. When the pressure changes, PWM regulation is performed on the condensation fan to control the rotation speed of the condensation fan to adjust the condensation pressure.

2. The electric cabinet air conditioner device for preventing condensate from being blown out according to claim 1, Characterized in that: A capillary tube is connected in series in the pipeline between the output end of the bypass solenoid valve and the corresponding valve port of the second three-way valve.

3. The electric cabinet air conditioner device for preventing condensate from being blown out according to claim 1, Characterized in that: A low-pressure pressure switch is installed in parallel in the pipeline between the output end of the evaporator and the input end of the evaporator pressure regulating valve, and the low-pressure pressure switch is electrically connected to the control box for signal transmission.

4. The electric cabinet air conditioner device for preventing condensate from being blown out according to claim 1, Characterized in that: A high-pressure pressure switch and an exhaust temperature sensor are connected in parallel in the pipeline between the output end of the scroll compressor and the input end of the air-cooled condenser, and the exhaust temperature sensor and the high-pressure pressure switch are respectively electrically connected to the control box for signal transmission.

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