Central air-conditioning dehumidification energy-saving device for circuit board production workshop

Abstract

The utility model relates to the technical field of central air conditioners, and provides a central air conditioner dehumidifying and energy-saving device for a circuit board production workshop, which comprises a production workshop, equipment for manufacturing circuit boards to generate hot air, a central air conditioner and a hot air flow guide component, the central air conditioner comprises a fresh air pipe, a fresh air regulating valve, an air inlet pipe, a fan, an evaporator and a heater; the hot air generating equipment for manufacturing the circuit board is positioned at the bottom of the production workshop; the top of the production workshop is connected with an outlet of the air inlet pipe; the hot air flow guiding assembly comprises a suction cover, an air conveying pipe, an air conveying adjusting valve and a mixing pipe. Compared with the prior art, the hot air flow guide assembly has the advantages that the hot air flow guide assembly guides the hot air to the mixing pipe by utilizing the hot air generated when the circuit board manufacturing hot air generating equipment works, low-temperature fresh air coming out of the evaporator enters the mixing pipe, the hot air and the low-temperature fresh air hot air are mixed, the fresh air is preheated, the starting time of a heater is shortened, and the heating efficiency is improved. And electric energy for dehumidification work of the central air conditioner is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of central air conditioning, in particular to a central air conditioning dehumidification and energy-saving device for a circuit board production workshop. Background Art

[0002] Circuit boards, also known as PCBs, are important electronic components that support electronic devices. In a PCB production workshop, there are multiple devices that generate heat during PCB manufacturing, such as laminators and LDI photoplotters located in the exposure room.

[0003] Typically, circuit board production workshops are equipped with central air conditioning to maintain a constant temperature and humidity. The central air conditioning system's refrigeration and dehumidification system consists of an evaporator, compressor, condenser, expansion valve, and heater. The compressor extracts gaseous refrigerant from the evaporator and presses it into the condenser. High-pressure gaseous refrigerant liquefies as it passes through the condenser, releasing heat, which is then carried away by the outside air. The high-pressure liquid refrigerant is throttled by the expansion valve, reducing its pressure. The low-pressure liquid refrigerant vaporizes and absorbs heat as it flows into the evaporator. Driven by the fan, the fresh air entering the central air conditioning system cools as it passes through the evaporator. The moisture in the fresh air cools down in the evaporator, transforming into liquid water and separating from the fresh air. The fresh air exiting the evaporator is at a low temperature, which is then heated by the heater to a suitable temperature before entering the production workshop.

[0004] The humidity of the outside air in the south is high, and the central air-conditioning in the circuit board production workshop in the south often turns on the dehumidification function. During the dehumidification process, the fresh air needs to be heated by the heater after cooling, so the power consumption of the central air-conditioning dehumidification work is relatively high.

[0005] See Figure 1 Schematic diagram of the connection between existing central air conditioning and a production workshop. Fresh air from the outside, after being dehumidified by the central air conditioner, enters production workshop 1. Hot air generated by hot equipment 2 manufacturing circuit boards, such as laminators and LDI plotters, rises during operation. This hot air is cooled by the fresh air from the central air conditioner and finally discharged through exhaust duct 38.

[0006] Therefore, how to use the heat generated by the heat generating equipment for manufacturing circuit boards during operation to preheat the fresh air, reduce the start-up time of the heater, and save electricity for the dehumidification work of the central air conditioner is a technical problem that needs to be solved urgently in this field. Utility Model Content

[0007] The technical problem to be solved by the present invention is to provide a central air-conditioning dehumidification and energy-saving device for a circuit board production workshop, which utilizes the hot air generated by the heat-generating equipment for manufacturing circuit boards during operation to preheat the fresh air, thereby reducing the start-up time of the heater and saving electricity for the central air-conditioning dehumidification work.

[0008] The utility model is implemented as follows: a central air-conditioning dehumidification and energy-saving device for a circuit board production workshop, comprising:

[0009] Production workshops, circuit board manufacturing equipment that generates heat, central air conditioning, and heat guide components;

[0010] The central air conditioner includes a fresh air duct, a fresh air regulating valve, an air inlet duct, a fan, an evaporator and a heater, wherein the fresh air regulating valve is installed in the fresh air duct, the outlet of the fresh air duct is connected to the inlet of the evaporator, the outlet of the heater is connected to the inlet of the fan, and the outlet of the fan is connected to the inlet of the air inlet duct;

[0011] The heat generating equipment for manufacturing circuit boards is located at the bottom of the production workshop, and the top of the production workshop is connected to the outlet of the air inlet pipe;

[0012] The hot air deflection assembly includes a suction hood, an air supply pipe, an air supply regulating valve and a mixing pipe. The suction hood is fixedly arranged above the hot air generating equipment for manufacturing circuit boards. The inlet of the air supply pipe is connected to the suction hood. The air supply pipe passes through the production workshop. The outlet of the air supply pipe is connected to the first port of the mixing pipe. The air supply regulating valve is installed on the air supply pipe. The second port of the mixing pipe is connected to the outlet of the evaporator. The third port of the mixing pipe is connected to the inlet of the heater.

[0013] Furthermore, the hot gas guide assembly further includes a temperature sensor and an MCU, wherein the temperature sensor is installed at the third port of the mixing tube and is electrically connected to the MCU;

[0014] The MCU is also electrically connected to the heater and the gas supply regulating valve.

[0015] Furthermore, the production workshop is an exposure room, and the equipment for generating heat for manufacturing circuit boards is a laminator or an LDI photoplotter.

[0016] Furthermore, the central air conditioner further comprises a fresh air filter, which is installed at the inlet of the fresh air duct;

[0017] The hot gas guide assembly further includes a hot gas filter, which is installed on the gas pipe and located between the suction hood and the gas supply regulating valve.

[0018] Furthermore, the central air conditioner also includes an exhaust pipe and a one-way valve. The inlet of the exhaust pipe is connected to the production workshop, and the one-way valve is installed at the outlet of the exhaust pipe.

[0019] Further, the central air conditioner further comprises a return air pipe and a return air regulating valve, an inlet of the return air pipe is connected with a middle part of the exhaust air pipe, an outlet of the return air pipe is connected with an inlet of the evaporator, and the return air regulating valve is installed on the return air pipe.

[0020] Further, the hot gas guiding assembly further comprises a sealing ring, which is installed at a connection between the gas conveying pipe and the production workshop.

[0021] Compared with the background art, the central air conditioner dehumidification energy-saving device has the advantages that: the hot gas generated by the hot gas generating equipment for manufacturing circuit boards is guided to the mixing pipe by the hot gas guiding assembly, the low-temperature fresh air from the evaporator enters the mixing pipe, the hot gas and the low-temperature fresh air are mixed, the fresh air is preheated, the heated fresh air enters the heater, the starting time of the heater is reduced, the heater does not need to be started when the temperature of the mixed fresh air is suitable, and finally under the driving of the fan, the fresh air flows to the production workshop, thereby saving the electric energy for the dehumidification work of the central air conditioner. BRIEF DESCRIPTION OF DRAWINGS

[0022] The central air conditioner dehumidification energy-saving device for a circuit board production workshop according to the present application will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 Fig. 1 is a schematic view showing the connection between a production workshop and a central air conditioner in the background art.

[0024] Figure 2 Fig. 2 is a schematic view showing the structure of a central air conditioner dehumidification energy-saving device for a circuit board production workshop according to the present application.

[0025] Figure 3 Fig. 3 is a schematic view showing the connection between an MCU, a temperature sensor, a heater and a gas conveying regulating valve in an embodiment of the present application.

[0026] Fig. 1 is a schematic view showing the connection between a production workshop and a central air conditioner in the background art. DETAILED DESCRIPTION

[0027] The central air conditioner dehumidification energy-saving device for a circuit board production workshop according to the present application has the advantages that: the central air conditioner dehumidification energy-saving device for a circuit board production workshop according to the present application overcomes the defect that the power consumption of the central air conditioner dehumidification work of the production workshop in the background art is large; the hot gas generated by the hot gas generating equipment for manufacturing circuit boards is utilized to preheat the fresh air, the starting time of the heater is reduced, and the electric energy for the dehumidification work of the central air conditioner is saved.

[0028] The overall idea of ​​the technical solution of the embodiment of the utility model is as follows:

[0029] A mixing tube is set between the evaporator and the heater of the central air conditioner, and then an extraction hood and an air supply pipe are set. Driven by the fan, the hot air generated by the hot air generating equipment for manufacturing circuit boards in the production workshop is diverted to the mixing tube. The fresh air coming out of the evaporator and after dehumidification enters the mixing tube and mixes with the hot air to preheat the fresh air. The preheated fresh air enters the heater. Since the temperature of the fresh air rises at this time, the start-up time of the heating pipe is reduced, so that the fresh air can be at a suitable temperature. The fresh air with a suitable temperature flows to the production workshop through the air inlet pipe, ensuring that the production workshop is in a set constant temperature and humidity state, which helps to keep the staff in the production workshop in a comfortable environment.

[0030] The temperature sensor detects the temperature of the preheated fresh air. If it's below the set optimum temperature, the MCU activates the heater to raise the fresh air temperature. When the temperature sensor reaches the set optimum temperature, the MCU shuts down the heater. If the temperature sensor exceeds the set optimum temperature, the MCU controls the gas flow control valve to reduce the flow of hot air into the mixing pipe.

[0031] As the humidity of the outside air is high in the south, you can choose to reduce the fresh air regulating valve to reduce the fresh air intake, and increase the return air regulating valve to circulate the air in the production workshop, reduce the dehumidification workload of the central air conditioner, and help save energy.

[0032] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0033] See Figures 1 to 3 , a preferred embodiment of the present utility model.

[0034] A central air-conditioning dehumidification and energy-saving device for a circuit board production workshop, comprising:

[0035] Production workshop 1, circuit board manufacturing heat generation equipment 2, central air conditioning 3 and hot air guide components 4;

[0036] The central air conditioner 3 includes a fresh air duct 31, a fresh air regulating valve 32, an air inlet duct 33, a fan 34, an evaporator 35 and a heater 36. The fresh air regulating valve 32 is installed in the fresh air duct 31. The outlet of the fresh air duct 31 is connected to the inlet of the evaporator 35. The outlet of the heater 36 is connected to the inlet of the fan 34. The outlet of the fan 34 is connected to the inlet of the air inlet duct 33.

[0037] The heat generating device 2 for manufacturing circuit boards is located at the bottom of the production workshop 1, and the top of the production workshop 1 is connected to the outlet of the air inlet pipe 33;

[0038] The hot gas deflector assembly 4 includes a suction hood 41, an air supply pipe 42, a air supply regulating valve 43 and a mixing pipe 44. The suction hood 41 is fixedly arranged above the hot gas generating equipment 2 for manufacturing circuit boards. The inlet of the air supply pipe 42 is connected to the suction hood 41. The air supply pipe 42 passes through the production workshop 1. The outlet of the air supply pipe 42 is connected to the first port of the mixing pipe 44. The air supply regulating valve 43 is installed on the air supply pipe 42. The second port of the mixing pipe 44 is connected to the outlet of the evaporator 35. The third port of the mixing pipe 44 is connected to the inlet of the heater 36.

[0039] Compared with the background technology, the advantages of the present invention are: through the hot air diversion component 4, the hot air generated by the hot air generating equipment 2 for manufacturing circuit boards during operation is utilized to divert the hot air to the mixing tube 44, and the low-temperature fresh air coming out of the evaporator 35 enters the mixing tube 44, the hot air and the low-temperature fresh air hot air are mixed, and the fresh air is preheated. The heated fresh air enters the heater 36, reducing the start-up time of the heater 36. When the temperature of the mixed fresh air is at an appropriate temperature, there is no need to start the heating tube. Finally, driven by the fan 34, the fresh air flows to the production workshop 1, saving electricity for the dehumidification work of the central air conditioner 3.

[0040] The heater 36 includes a heating coil. The fresh air regulating valve 32 and the gas supply regulating valve 43 are both electric regulating valves.

[0041] The hot gas guide assembly 4 further includes a temperature sensor 45 and an MCU 46 . The temperature sensor 45 is installed at the third opening of the mixing tube 44 and is electrically connected to the MCU 46 .

[0042] The MCU 46 is also electrically connected to the heater 36 and the gas supply regulating valve 43. The beneficial effect of this technical solution is that the temperature sensor 45 detects the temperature of the preheated fresh air. When it is lower than the set suitable temperature, the MCU 46 first controls the gas supply regulating valve 43 to open the valve to the maximum. If the temperature of the preheated fresh air is still lower than the set suitable temperature, the MCU 46 restarts the heater 36, and the fresh air continues to heat up after passing through the heater 36. When the temperature detected by the temperature sensor 45 is equal to the set suitable temperature, the MCU 46 controls the heater 36 to shut down. When the temperature detected by the temperature sensor 45 is higher than the set suitable temperature, the MCU 46 controls the gas supply regulating valve 43 to reduce the valve opening, thereby reducing the flow of hot air into the mixing pipe 44.

[0043] The production workshop 1 is an exposure room, and the heat generating equipment 2 for manufacturing circuit boards is a laminating machine or an LDI photoplotter.

[0044] The central air conditioner 3 further includes a fresh air filter 37 , which is installed at the inlet of the fresh air duct 31 ;

[0045] The hot air guide assembly 4 further includes a hot air filter 47, which is installed in the air supply pipe 42 and located between the suction hood 41 and the air supply regulating valve 43. Both the fresh air filter 37 and the hot air filter 47 effectively reduce the entry of impurities into the central air conditioner 3.

[0046] The central air conditioner 3 further includes an exhaust duct 38 and a one-way valve 39. The inlet of the exhaust duct 38 is connected to the production workshop 1, and the one-way valve 39 is installed at the outlet of the exhaust duct 38. The beneficial effect of this technical solution is that the air in the production workshop 1 flows to the outside through the one-way valve 39, and the outside air cannot enter the exhaust duct 38 through the one-way valve 39.

[0047] The central air conditioner 3 further includes a return air duct 310 and a return air regulating valve 311. The inlet of the return air duct 310 is connected to the middle portion of the exhaust duct 38, and the outlet of the return air duct 310 is connected to the inlet of the evaporator 35. The return air regulating valve 311 is installed on the return air duct 310. The beneficial effect of this technical solution is that in the south where the outside air humidity is high, the fresh air regulating valve 32 can be lowered to reduce the amount of fresh air intake, and the return air regulating valve 311 can be increased to circulate air in the production workshop 1, reducing the dehumidification workload of the central air conditioner 3 and contributing to energy conservation.

[0048] When the return air regulating valve 311 is opened, the air in the production workshop 1 first enters the exhaust duct 38, part of the air flows to the outside through the one-way valve 39, and the other part of the air flows to the return air duct 310 and is mixed with the fresh air at the inlet of the evaporator 35, then flows into the evaporator 35 for cooling and dehumidification, and then is mixed with the hot air in the mixing pipe 44 for preheating, and then passes through the heater 36, the fan 34, and the air inlet pipe 33, and finally flows to the production workshop 1.

[0049] The hot air generated by the hot air generating equipment 2 for manufacturing circuit boards during operation rises and enters the mixing pipe 44 through the suction hood 41 and the air supply pipe 42. This effectively prevents the hot air from being cooled by the air blown out of the air inlet pipe 33, and also prevents the hot air from passing through the exhaust pipe 38 and the return air pipe 310 to enter the evaporator 35 and be cooled, thereby effectively utilizing the hot air generated by the hot air generating equipment 2 for manufacturing circuit boards during operation.

[0050] The hot gas guide assembly 4 further includes a sealing ring 48, which is installed at the connection between the gas pipe 42 and the production workshop 1. The beneficial effect of this technical solution is to avoid gas leakage at the connection.

[0051] Working mode of this utility model:

[0052] (1) In the production workshop 1, there are workers and equipment related to the production of circuit boards. Driven by the fan 34 of the central air conditioner 3, the hot air generated by the hot air generating equipment 2 for the production of circuit boards during operation passes through the suction hood 41 and the air pipe 42 to the mixing pipe 44. The fresh air from the outside flows through the fresh air pipe 31 into the evaporator 35 for cooling and dehumidification, and is then preheated in the mixing pipe 44. If the preheated fresh air temperature is lower than the set suitable temperature, the heating pipe is started; if the preheated fresh air temperature is equal to the set suitable temperature, the heating pipe is turned off; if the preheated fresh air temperature is higher than the set suitable temperature, the hot air flow entering the mixing pipe 44 is reduced. The preheated fresh air passes through the heater 36, the fan 34, the air inlet pipe 33, and finally enters the production workshop 1. This reduces the startup time of the heater 36 and saves the electricity used for the dehumidification work of the central air conditioner 3. This helps to provide a comfortable environment for the workers in the production workshop.

[0053] (2) In the case of high humidity in the south, the fresh air regulating valve 32 can be reduced to reduce the fresh air intake, and the return air regulating valve 311 can be increased to circulate the air in the production workshop 1, reducing the dehumidification workload of the central air conditioner 3 and helping to save energy.

[0054] (3) While ensuring that the air inlet pipe 33 is at positive pressure, the frequency of the fan 34 is reduced to lower the power used by the fan 34 and reduce unnecessary electricity waste of the central air conditioner 3.

[0055] Although the specific implementation methods of the present invention are described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A central air-conditioning dehumidification and energy-saving device for a circuit board production workshop, characterized in that: include: Production workshops, circuit board manufacturing equipment that generates heat, central air conditioning, and heat guide components; The central air conditioner includes a fresh air duct, a fresh air regulating valve, an air inlet duct, a fan, an evaporator and a heater, wherein the fresh air regulating valve is installed in the fresh air duct, the outlet of the fresh air duct is connected to the inlet of the evaporator, the outlet of the heater is connected to the inlet of the fan, and the outlet of the fan is connected to the inlet of the air inlet duct; The heat generating equipment for manufacturing circuit boards is located at the bottom of the production workshop, and the top of the production workshop is connected to the outlet of the air inlet pipe; The hot air deflection assembly includes a suction hood, an air supply pipe, an air supply regulating valve and a mixing pipe. The suction hood is fixedly arranged above the hot air generating equipment for manufacturing circuit boards. The inlet of the air supply pipe is connected to the suction hood. The air supply pipe passes through the production workshop. The outlet of the air supply pipe is connected to the first port of the mixing pipe. The air supply regulating valve is installed on the air supply pipe. The second port of the mixing pipe is connected to the outlet of the evaporator. The third port of the mixing pipe is connected to the inlet of the heater.

2. A central air-conditioning dehumidification and energy-saving device for a circuit board production workshop according to claim 1, characterized in that: The hot gas guide assembly further includes a temperature sensor and an MCU, wherein the temperature sensor is installed at the third opening of the mixing tube and is electrically connected to the MCU; The MCU is also electrically connected to the heater and the gas supply regulating valve.

3. A central air-conditioning dehumidification and energy-saving device for a circuit board production workshop according to claim 1, characterized in that: The production workshop is an exposure room, and the equipment for generating heat for manufacturing circuit boards is a laminator or an LDI photoplotter.

4. A central air-conditioning dehumidification and energy-saving device for a circuit board production workshop according to claim 1, characterized in that: The central air conditioner further comprises a fresh air filter, which is installed at the inlet of the fresh air duct; The hot gas guide assembly further includes a hot gas filter, which is installed on the gas pipe and located between the suction hood and the gas supply regulating valve.

5. The central air-conditioning dehumidification and energy-saving device for a circuit board production workshop according to claim 1, characterized in that: The central air conditioner further includes an exhaust pipe and a one-way valve. The inlet of the exhaust pipe is connected to the production workshop, and the one-way valve is installed at the outlet of the exhaust pipe.

6. A central air-conditioning dehumidification and energy-saving device for a circuit board production workshop according to claim 5, characterized in that: The central air conditioner also includes a return air duct and a return air regulating valve. The inlet of the return air duct is connected to the middle of the exhaust duct, the outlet of the return air duct is connected to the inlet of the evaporator, and the return air regulating valve is installed on the return air duct.

7. The central air-conditioning dehumidification and energy-saving device for a circuit board production workshop according to claim 1, characterized in that: The hot gas guide assembly further includes a sealing ring, which is installed at the connection between the gas pipe and the production workshop.

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