CN202276554U - Constant temperature and humidity chamber tester for circuit board production - Google Patents
Constant temperature and humidity chamber tester for circuit board production Download PDFInfo
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- CN202276554U CN202276554U CN2012200203040U CN201220020304U CN202276554U CN 202276554 U CN202276554 U CN 202276554U CN 2012200203040 U CN2012200203040 U CN 2012200203040U CN 201220020304 U CN201220020304 U CN 201220020304U CN 202276554 U CN202276554 U CN 202276554U
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Abstract
The utility model relates to a constant temperature and humidity chamber tester for circuit board production, which is characterized by comprising a control system (1), a refrigeration box and a test room (3), wherein the control system (1) is provided with a controller (1-1); the refrigeration box comprises a box body (2), and a compressor (2-1) and a refrigerant device (2-2) which are arranged in the box body; a humidifier (3-1) and a heater (3-2) are arranged in the test room (3); the first control output end of the controller (1-1) is connected with the control input end of the refrigeration box; the second control output end of the controller (1-1) is connected with the control input end of the test room (3); the compressor (2-1) forms a reversed Carnot cycle refrigeration system through the refrigerant device (2-2) and an intercept valve (4); an air outlet of the refrigeration box is communicated with the inner cavity of the test room (3); and the humidifier (3-1) and the heater (3-2) form a shallow water disk humidification system in the test room (3). The utility model has the advantage of quick humidification response capacity, avoids influencing the circuit due to water leakage of the pipeline, and enhances the safety.
Description
Technical field
The utility model relates to a kind of constant temperature and humidity device, especially a kind of climatic chamber testing machine that is used for wiring board production.Belong to wiring board production equipment technical field.
Background technology
The climatic chamber testing machine can be simulated low temperature, high temperature, hot and humid, low temperature and low humidity complex natural shape environment; Be to make one of important process equipment in the printed circuit board (PCB) process; Utilize the climatic chamber testing machine can product be stored in the environment of a constant temperature and humidity, specifically comprise cooling system and humidification system.
The constant temperature and humidity mechanism of prior art; Control to humidity mainly is to carry out simple switching value with mercury electric contact type conductivity meter to regulate; Control adaptability for the boiler water temperature of large time delay is relatively poor, and therefore the transient process of control is longer, can not satisfy that alternation is damp and hot to require more needs to the humidification amount; More importantly be in, have water droplet to drench on test product inevitably test product is formed pollution in various degree the tank wall spray.Therefore, need a kind of climatic chamber testing machine of design,, create suitable environmental condition for producing high-quality wiring board in order to accurate simulation low temperature, high temperature, hot and humid, low temperature and low humidity complex natural shape environment.
The utility model content
The purpose of the utility model; Be that above-mentioned prior art refrigerating system is unstable, the slower problem of humidification system respond in order to solve; A kind of climatic chamber testing machine that wiring board is produced that is used for is provided; This climatic chamber test function is accurately simulated low temperature, high temperature, hot and humid, low temperature and low humidity complex natural shape environment, creates suitable environmental condition for producing high-quality wiring board.
The purpose of the utility model can reach through following technical scheme:
Be used for the climatic chamber testing machine that wiring board is produced; It is characterized in that: comprise control system, refrigeration case and laboratory; Said control system is provided with controller, and said refrigeration case comprises casing and is arranged on compressor and the refrigerant system in the casing, in laboratory, is provided with humidifier and heater; One of control output end of controller connects the control input end of refrigeration case, and two of the control output end of controller connects the laboratory control input end; Said compressor forms contrary Carnot cycle refrigerating system through refrigerant system, shutoff valve; The inner chamber of the air outlet connection test chamber of refrigeration case; Said humidifier and heater) formation shallow water dish humidification system in laboratory.
The purpose of the utility model can also reach through following technical scheme:
A kind of embodiment of the utility model is: can be provided with A/D converter and multiplexer in the said control system, an I/O mouth of controller is connected the wet inverting chamber of heat of laboratory with multiplexer through said A/D converter.
A kind of embodiment of the utility model is: in laboratory, can be provided with and regulate the fan that adds heat and humidification amount, an output control of said controller is defeated to be connected with fan motor and to be electrically connected fan through fan motor.
A kind of embodiment of the utility model is: said refrigerant system can be connected with shutoff valve through spray thrower.
The utlity model has following outstanding beneficial effect:
1, the utility model forms contrary Carnot cycle refrigerating system by compressor, cold-producing medium and shutoff valve, makes the warming and humidifying amount equal hot damage of damp consumption, so can use steady in a long-term.
2, the utility model adopts shallow water dish humidification system, and humidification respond is faster arranged, because humidification system separates with power supply, controller, circuit board, can avoid influencing circuit because of pipeline leaks, and improves fail safe.
Description of drawings
Fig. 1 is the structure principle chart of the utility model.
Fig. 2 is the complete machine sketch map of the utility model.
Fig. 3 is the effect sketch map of the utility model after implementing.
Wherein, 1-control system, 2-refrigeration case, 3-laboratory, 4-shutoff valve, 5-fan motor, 6-spray thrower.
Embodiment
Specific embodiment 1:
Fig. 1 and Fig. 2 constitute the specific embodiment 1 of the utility model.
See figures.1.and.2; Present embodiment comprises control system 1, refrigeration case and laboratory 3; Said control system 1 is provided with controller 1-1, and said refrigeration case comprises casing 2 and is arranged on compressor 2-1 and the refrigerant system 2-2 in the casing, in laboratory 3, is provided with humidifier 3-1 and heater 3-2; One of control output end of controller 1-1 connects the control input end of refrigeration case, and two of the control output end of controller 1-1 connects laboratory 3 control input ends; Said compressor 2-1 forms contrary Carnot cycle refrigerating system through refrigerant system 2-2, shutoff valve 4; The inner chamber of the air outlet connection test chamber 3 of refrigeration case; Said humidifier 3-1 and heater 3-2 form shallow water dish humidification system in laboratory 3.
In the present embodiment, said control system 1 also includes A/D converter 1-2 and multiplexer 1-3, and said A/D converter 1-2 is connected to the wet inverting chamber 3-3 of heat of laboratory 3 through multiplexer 1-3.The output control terminal of said controller 1-1 also is connected with fan motor 5, is connected with in laboratory 3 through fan motor 5 and regulates the fan 3-4 that adds heat and humidification amount.Said cold-producing medium 2-2 is connected with shutoff valve 4 through spray thrower 6.
The operation principle of present embodiment is following:
Contrary Carnot cycle refrigerating system: to higher pressure, the merit that has consumed raises exhaust temperature to cold-producing medium through the compressor adiabatic compression, afterwards cold-producing medium through condenser isothermal ground and all around medium carry out heat exchange heat passed to medium all around; Then, cold-producing medium is through the acting of shutoff valve adiabatic expansion, and at this moment refrigerant temperature reduces; At last, cold-producing medium from the heat absorption of the higher object of temperature, makes the reduction of cooled object temperature through evaporator isothermal ground, thereby this circulation goes round and begins again and reaches the purpose of cooling.Can guarantee that refrigeration case normally moves, can effectively regulate the energy consumption and the refrigerating capacity of refrigerating system again, make refrigerating system remain on best running status; Adopt the balance temperature adjustment, both under the situation of refrigerating system in continuous operation, the output variable that the result that control system is exported through the automatic computing of PID according to the temperature spot of setting removes control heater finally reached a kind of dynamic equilibrium.
Said shallow water dish humidification system:, the wet exchange of heat takes place with water surface when air during through the water surface that opens wide.Different by its water temperature, the sensible heat exchange possibly only take place; Also possibly exchange by existing sensible heat, the exchange of wetting again also has the latent heat exchange simultaneously.Sensible heat exchange is to have the temperature difference between air and the water, and because of heat conduction, convection current and radiation effects heat exchange, and the latent heat exchange is airborne water vapour evaporation (or condensing) and absorb the result of (or emitting) latent heat of vaporization.Total heat exchange amount is the algebraical sum of sensible heat exchange capacity and latent heat exchange capacity.
With reference to Fig. 3; The effect of present embodiment: when air directly contacts with the water surface; On adjoined water surface; Because hydrone is made the result of irregular movement, formed the saturated air boundary layer that a temperature equals water surface temperature, and the concentration of its stream molecule or steam partial pressure depend on the saturation air temperature in boundary layer.Be higher than the temperature of air on it like the temperature in boundary layer, then conduct heat to air by the boundary layer; Otherwise then by air to boundary layer heat transfer.Like the stream molecule concentration (be the partial pressure of water vapor in boundary layer partial pressure of water vapor greater than air) of stream molecule concentration in the boundary layer greater than air on it, then airborne stream molecule number will increase; Otherwise then will reduce.The former is called " evaporation ", and the latter is called " condensation ".In evaporation process, the vapour molecule that has reduced in the boundary layer is replenished by the hydrone that the water surface jumps out; In condensation process, vapour molecule too much in the boundary layer will be got back to the water surface.This shows that the temperature difference between boundary layer and its top air is depended in the exchange of sensible heat between air and the water, and wet exchange and the latent heat that causes therefrom exchange and depend on that the concentration difference of stream molecule between the two or partial pressure are poor.
The above; It only is the preferred embodiment of the utility model; Be not that the technical scope of the utility model is done any restriction; So every technical spirit according to the utility model to any trickle modification, equivalent variations and modification that above embodiment did, all still belongs in the scope of the utility model technology Fang An.。
Claims (4)
1. be used for the climatic chamber testing machine that wiring board is produced; It is characterized in that: comprise control system (1), refrigeration case and laboratory (3); Said control system (1) is provided with controller (1-1); Said refrigeration case comprises casing (2) and is arranged on compressor (2-1) and the refrigerant system (2-2) in the casing; In laboratory (3), be provided with humidifier (3-1) and heater (3-2), one of control output end of controller (1-1) connects the control input end of refrigeration case, and two of the control output end of controller (1-1) connects laboratory (3) control input end; Said compressor (2-1) forms contrary Carnot cycle refrigerating system through refrigerant system (2-2), shutoff valve (4); The inner chamber of the air outlet connection test chamber (3) of refrigeration case; Said humidifier (3-1) and heater (3-2) form shallow water dish humidification system in laboratory (3).
2. the climatic chamber testing machine that is used for wiring board production according to claim 1; It is characterized in that: be provided with A/D converter (1-2) and multiplexer (1-3) in the said control system (1), an I/O mouth of controller (1-1) is connected the wet inverting chamber (3-3) of heat of laboratory (3) with multiplexer (1-3) through said A/D converter (1-2).
3. the climatic chamber testing machine that is used for wiring board production according to claim 1; It is characterized in that: in laboratory (3), be provided with and regulate the fan (3-4) that adds heat and humidification amount, an output control of said controller (1-1) is defeated to be connected with fan motor (5) and to be electrically connected fan (3-4) through fan motor (5).
4. the climatic chamber testing machine that is used for wiring board production according to claim 1 is characterized in that: said refrigerant system (2-2) is connected with shutoff valve (4) through spray thrower (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200203040U CN202276554U (en) | 2012-01-16 | 2012-01-16 | Constant temperature and humidity chamber tester for circuit board production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200203040U CN202276554U (en) | 2012-01-16 | 2012-01-16 | Constant temperature and humidity chamber tester for circuit board production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202276554U true CN202276554U (en) | 2012-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200203040U Expired - Fee Related CN202276554U (en) | 2012-01-16 | 2012-01-16 | Constant temperature and humidity chamber tester for circuit board production |
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| Country | Link |
|---|---|
| CN (1) | CN202276554U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110382965A (en) * | 2017-02-23 | 2019-10-25 | 伸和控制工业股份有限公司 | Air-conditioning device |
-
2012
- 2012-01-16 CN CN2012200203040U patent/CN202276554U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110382965A (en) * | 2017-02-23 | 2019-10-25 | 伸和控制工业股份有限公司 | Air-conditioning device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120613 Termination date: 20130116 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |