CN201359351Y - Air-conditioning laboratory - Google Patents
Air-conditioning laboratory Download PDFInfo
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- CN201359351Y CN201359351Y CNU2009200736448U CN200920073644U CN201359351Y CN 201359351 Y CN201359351 Y CN 201359351Y CN U2009200736448 U CNU2009200736448 U CN U2009200736448U CN 200920073644 U CN200920073644 U CN 200920073644U CN 201359351 Y CN201359351 Y CN 201359351Y
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Abstract
The utility model discloses an air-conditioning laboratory which comprises a laboratory bin body, an air handling unit and a measurement and control unit, wherein the laboratory bin body is a closed adiabatic space; the air handling unit comprises a variable-frequency direct air-cooling unit, a heating device, a humidifying device and a fan; the measurement and control unit comprises a temperature sensor, a temperature control unit, a humidity sensor, a humidity control unit and a signal comparison unit; the temperature control unit receives signals from the temperature sensor, converts the signals and then outputs the signals in two ways, wherein one way enters the heating device to control heat quantity output, and the other way enters the signal comparison unit; the humidity control unit receives signals from the humidity sensor, converts the signals and then outputs the signals in two ways, wherein one way enters the humidifying device to control humidifying volume output, and the other way enters the signal comparison unit; and the signal comparison unit receives two ways of signals from the temperature control unit and the humidity control unit, compares the signals and then outputs the way of stronger signals to a frequency converter of the variable-frequency direct air-cooling unit. The air-conditioning laboratory can achieve better energy-saving effect.
Description
Technical field
The utility model relates to a kind of air conditioning test chamber of constant temperature and humidity.
Background technology
At air conditioner industry the air conditioning test chamber of many constant temperature and humidities is arranged, for example enthalpy difference chamber, balance cylinder, anechoic chamber etc., these laboratories the typical case of air parameter is required be: temperature range is-10 ℃-60 ℃, control accuracy ± 0.1 ℃; Humidity range is 15%RH～95%RH, control accuracy ± 2%RH.
Indoor temperature sensor, temperature control unit, heater, humidity sensor, humidity controlling unit and the damping device of being provided with of existing air conditioning test.Temperature sensor is imported corresponding temperature control unit with the temperature signal that records, and the heat that adds that temperature control unit is controlled heater automatically according to the deviation of setting value and measured value is exported.In like manner humidity sensor is imported corresponding humidity controlling unit with the moisture signal that records, and humidity controlling unit is controlled the humidification amount output of damping device automatically according to the deviation of setting value and measured value.Simultaneously, the freezing unit that can't regulate continuously with one or more refrigerating capacity removes thermic load and the humidity load in the laboratory, finally reaches the humiture requirement of air conditioning test chamber.Cold-hot counteraction in this traditional air handling process has caused energy dissipation, less economical undoubtedly, obviously runs in the opposite direction with existing energy-saving and emission-reduction policy.
The utility model content
Technical problem to be solved in the utility model provides a kind of high-precision constant-temperature constant-humidity air-conditioner laboratory, and this air conditioning test chamber can reach energy-saving effect preferably.
For solving the problems of the technologies described above, the utility model air conditioning test chamber comprises:
Laboratory's warehouse is the space of an airtight thermal insulation;
Air conditioner unit comprises the direct-cooled unit of frequency conversion, heater, damping device and blower fan;
Measurement and control unit comprises temperature sensor, temperature control unit, humidity sensor, humidity controlling unit and signal comparing unit;
Described temperature control unit receives the signal from temperature sensor, changes back two-way output, and one the tunnel enters heater control adds heat output, another road entering signal comparing unit;
Described humidity controlling unit receives the signal from humidity sensor, changes back two-way output, and one the tunnel enters the output of damping device control humidification amount, another road entering signal comparing unit;
Described signal comparing unit receives the two paths of signals from temperature control unit and humidity controlling unit, compares the frequency converter that back a road bigger signal of output enters the direct-cooled unit of frequency conversion.
It is a kind of with direct-cooled unit of frequency conversion and the constant-temperature constant-humidity air-conditioner laboratory that compares control loop that the utility model provides.Because the refrigerating capacity of the direct-cooled unit of frequency conversion is adjustable continuously, so the phenomenon that cooling and heating are cancelled each other can reduce control temperature in the existing air conditioning test chamber time perhaps dehumidifies during controlled humidity and phenomenon that humidification is cancelled each other.But the cooling of the direct-cooled unit of frequency conversion and dry and carry out simultaneously, the utility model are by adding the signal comparing unit, make the direct-cooled unit of frequency conversion only be used for a kind of of temperature control or humidity control sometime.When the direct-cooled unit of frequency conversion was used for temperature control, humidity control was undertaken by damping device; When the direct-cooled unit of frequency conversion was used for humidity control, temperature control was undertaken by heater.The utility model air conditioning test chamber simple in structure, stable and reliable operation though need to increase expenses of some preliminary investments, for permanent operation, can obtain good energy-saving effect.
Description of drawings
Below in conjunction with drawings and Examples the utility model is described in further detail:
Fig. 1 is the structure and the operation principle schematic diagram of the utility model air conditioning test chamber.
Reference numeral is among the figure: 100-laboratory warehouse; The 200-air conditioner unit; The 210-frequency-changeable compressor; The 211-condenser; The 212-restricting element; The 213-evaporimeter; The 214-frequency converter; The 220-heater; The 230-damping device; The 240-blower fan; The 300-measurement and control unit; The 310-temperature sensor; The 320-humidity sensor; The 330-temperature control unit; The 340-humidity controlling unit; 350-signal comparing unit.
The specific embodiment
The embodiment of the utility model air conditioning test chamber comprises as shown in Figure 1:
Laboratory's warehouse 100 is the space of an airtight thermal insulation, is made of the material of adiabatic waterproof.
The direct-cooled unit of described frequency conversion comprises frequency-changeable compressor 210, condenser 211, restricting element 212, evaporimeter 213 and frequency converter 214.Wherein, the operating frequency of frequency-changeable compressor 210 is regulated by frequency converter 214; Condenser 211 is water-cooled condenser or air-cooled condenser; Restricting element 212 is heating power expansion valve or electric expansion valve, regulates the evaporating temperature of the direct-cooled unit of frequency conversion; 213 pairs of described air conditioning tests of evaporimeter chamber lowers the temperature and dehumidifies.
Measurement and control unit 300 comprises the temperature sensor 310 of measuring dry-bulb temperature in the laboratory, humidity sensor 320, temperature control unit 330, humidity controlling unit 340 and the signal comparing unit 350 of measuring the test indoor relative humidity.
The signal that described temperature control unit 330 receives from temperature sensor 310 is changed back two-way output, and one the tunnel enters heater 220 controls adds heat output, another road entering signal comparing unit 350.
The signal that described humidity controlling unit 340 receives from humidity sensor 320 is changed back two-way output, and one the tunnel enters damping device 230 control humidification amount outputs, another road entering signal comparing unit 350.
The two paths of signals that described signal comparing unit 350 receives from temperature control unit 330 and humidity controlling unit 340, compare the frequency converter 214 that back a road bigger signal of output enters the direct-cooled unit of frequency conversion, be used to control the operating frequency of frequency-changeable compressor 210, thus the cooling and the dehumidifying effect of the direct-cooled unit of control frequency conversion.
Described temperature control unit 330, humidity controlling unit 340 can be adjuster, Programmable Logic Controller (PLC) or computer (comprising single-chip microcomputer etc.), and described signal comparing unit 350 can be selector, Programmable Logic Controller (PLC) or computer (comprising single-chip microcomputer etc.).
In the present embodiment, restricting element 212, evaporimeter 213, heater 220, damping device 230, blower fan 240, temperature sensor 310 and humidity sensor 320 are positioned at laboratory's warehouse 100 inboards, frequency-changeable compressor 210, condenser 211 and frequency converter 214 are positioned at the inboard or the outside of laboratory's warehouse 100, and temperature control unit 330, humidity controlling unit 340 and signal comparing unit 350 place the outside of laboratory's warehouse 100.
In the present embodiment, the temperature controlling range in laboratory's warehouse 100 are-10-60 ℃, control accuracy can reach ± and 0.1 ℃; The humidity control range is 15%RH-95%RH, and control accuracy can reach ± 2%RH.With the specified heating condition of air-conditioning indoor is example, and promptly laboratory's inner control temperature is 20 ℃, 15 ℃ of wet-bulb temperature (relative humidity 58.5%RH).The direct-cooled unit refrigerating operaton of the frequency conversion of air conditioner unit 200 carries out cool-down dehumidification by the air in 213 pairs of laboratory's warehouses of evaporimeter 100 and handles.Temperature control unit 330 is exported to heater 220 according to the deviation of desired temperature and measured value with heating signal, and cooling signal is exported to signal comparing unit 350.Humidity controlling unit 340 is exported to damping device 230 according to the deviation of humidity set point and measured value with the humidification signal, and the dehumidifying signal is exported to signal selector 350.And signal comparing unit 350 is by selecting to enter the frequency converter 214 of exporting to the frequency conversion refrigeration unit behind a road big in its two paths of signals signal.By the direct-cooled unit cool-down dehumidification of frequency conversion, if the test indoor temperature has reached setting value, but humidity still is higher than setting value, at this moment, the dehumidifying signal of humidity controlling unit 340 outputs is greater than the cooling signal of temperature control unit 330 outputs, so signal comparing unit 350 can select the direct-cooled unit of frequency conversion to be used for controlled humidity, temperature will be by heater 220 controls.If the test indoor humidity has reached setting value, but temperature still is higher than setting value, at this moment, the cooling signal of temperature control unit 330 outputs is greater than the dehumidifying signal of humidity controlling unit 340 outputs, so signal comparing unit 350 can select the direct-cooled unit of frequency conversion to be used to control temperature, humidity will be by damping device 230 controls.Along with frequency-changeable compressor 210 operating frequencies raise, refrigerating capacity increases, and temperature and humidity all reduces.Otherwise frequency-changeable compressor 210 operating frequencies reduce, and refrigerating capacity reduces, and the cool-down dehumidification ability of evaporimeter 213 weakens.Wherein, the operating frequency range of frequency-changeable compressor 210 can reach 30Hz-90Hz, and the capacity adjustment scope is 5000W～15000W.In this process, heater 220 and damping device 230 can carry out an amount of compensation control by temperature control unit 330 and humidity controlling unit 340.
In the present embodiment, during specified heating operation, indoor is 3.2kW by test-run a machine (1HP) heating capacity, and the air-conditioning draught fan thermic load is 2kW; If do not adopt the frequency conversion unit, and adopt 3HP frequency unit (supposing that Energy Efficiency Ratio is 3) surely, refrigerating operaton, refrigerating capacity is 9.0kW, and sensible heat is 8.0kW, and latent heat is 1.0kW.In order to remedy unnecessary cold and moisture removal, heater 220 needs heating 8-3.2-2.0=2.8kW, and damping device 230 needs humidification 1kW, total energy consumption=2.8+1+2+3=8.8kW.And after adopting the direct-cooled unit of frequency conversion, when operating in 54Hz as if frequency-changeable compressor 210, its refrigerating capacity is about 9.0kW, suitable with fixed frequency unit capacity, however frequency-changeable compressor 210 may operate in lower frequency at this moment, be that evaporating temperature rises, refrigerating capacity descends, and is 38Hz such as frequency-changeable compressor 210 running frequencies, and this moment, its refrigerating capacity output was about 5.8kW, sensible heat 5.2kW, latent heat 0.6kW, then heater 220 needs heating 0kW, and damping device 230 needs humidification 0.6kW.Total energy consumption=0+0.6+2+1.9=4.5kW.Therefore, total power consumption reduces (8.8-4.5)/8.8=49%.In sum, the utility model air conditioning test chamber is a kind of quite energy-conservation and high-precision constant-temperature constant-humidity air-conditioner laboratory of being easy to realize.
Claims (3)
1, a kind of air conditioning test chamber, it is characterized in that: described air conditioning test chamber comprises:
Laboratory's warehouse is the space of an airtight thermal insulation;
Air conditioner unit comprises the direct-cooled unit of frequency conversion, heater, damping device and blower fan;
Measurement and control unit comprises temperature sensor, temperature control unit, humidity sensor, humidity controlling unit and signal comparing unit;
Described temperature control unit receives the signal from temperature sensor, changes back two-way output, and one the tunnel enters heater control adds heat output, another road entering signal comparing unit;
Described humidity controlling unit receives the signal from humidity sensor, changes back two-way output, and one the tunnel enters the output of damping device control humidification amount, another road entering signal comparing unit;
Described signal comparing unit receives the two paths of signals from temperature control unit and humidity controlling unit, compares the frequency converter that back a road bigger signal of output enters the direct-cooled unit of frequency conversion.
2, air conditioning test according to claim 1 chamber, it is characterized in that: the direct-cooled unit of described frequency conversion comprises:
Frequency-changeable compressor;
Condenser is water-cooled condenser or air-cooled condenser;
Restricting element is heating power expansion valve or electric expansion valve, regulates the evaporating temperature of the direct-cooled unit of frequency conversion;
Evaporimeter is lowered the temperature and is dehumidified described air conditioning test chamber;
Frequency converter, the operating frequency of regulating frequency-changeable compressor.
3, air conditioning test according to claim 1 chamber, it is characterized in that: described temperature control unit is adjuster, Programmable Logic Controller or computer, described humidity controlling unit is adjuster, Programmable Logic Controller or computer, and described signal comparing unit is selector, Programmable Logic Controller or computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200736448U CN201359351Y (en) | 2009-02-19 | 2009-02-19 | Air-conditioning laboratory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200736448U CN201359351Y (en) | 2009-02-19 | 2009-02-19 | Air-conditioning laboratory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201359351Y true CN201359351Y (en) | 2009-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200736448U Expired - Lifetime CN201359351Y (en) | 2009-02-19 | 2009-02-19 | Air-conditioning laboratory |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832615A (en) * | 2010-04-13 | 2010-09-15 | 广东美的电器股份有限公司 | Matching and debugging device for air-conditioning system |
| CN107036253A (en) * | 2017-05-09 | 2017-08-11 | 北京华宏环能科技有限公司 | A kind of enthalpy difference laboratory based on temperature humidity independent control |
| CN109126908A (en) * | 2018-08-30 | 2019-01-04 | 江苏拓米洛环境试验设备有限公司 | Electric expansion valve temperature and humidity control system |
| CN110595021A (en) * | 2019-10-08 | 2019-12-20 | 苏州惠林节能材料有限公司 | Method for controlling laboratory humidity by adopting temperature sensor |
-
2009
- 2009-02-19 CN CNU2009200736448U patent/CN201359351Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832615A (en) * | 2010-04-13 | 2010-09-15 | 广东美的电器股份有限公司 | Matching and debugging device for air-conditioning system |
| CN107036253A (en) * | 2017-05-09 | 2017-08-11 | 北京华宏环能科技有限公司 | A kind of enthalpy difference laboratory based on temperature humidity independent control |
| CN109126908A (en) * | 2018-08-30 | 2019-01-04 | 江苏拓米洛环境试验设备有限公司 | Electric expansion valve temperature and humidity control system |
| CN110595021A (en) * | 2019-10-08 | 2019-12-20 | 苏州惠林节能材料有限公司 | Method for controlling laboratory humidity by adopting temperature sensor |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091209 |