JP2007071457A - Air conditioning device for environmental test - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioning device for environmental test capable of reducing man-hour for executing an environmental test, miniaturizing the device, and reducing its running cost. <P>SOLUTION: This air conditioning device for environmental test is constituted as a part of an environmental test device main body 20, and held inside thereof in a state of covering a circumference of a part including a test mechanism portion 21 in which a tested object 10 is placed, and comprises a constant temperature tank 2 air-tightly attached to the environmental test device main body 20 and defining a constant temperature chamber 2a in its internal space, and a constant temperature unit 4 for adjusting a temperature of the constant temperature chamber 2a to a prescribed temperature in accordance with a constant-temperature test of the tested object 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

    The present invention relates to an environmental test air conditioner for performing an environmental test on a test object such as an automobile part.

For example, an environmental test (constant temperature test) for inspecting an operating state in a target environment is performed on a test object such as a part (automobile parts such as wipers and turn signals, electrical parts, mechanical parts, etc.). . Conventionally, in order to carry out such an environmental test, an environmental test apparatus as shown in FIG. 6 has been used.
The environmental test apparatus 100 includes a test apparatus main body 102 that fixes a device under test 101 and performs a predetermined operation corresponding to the test, and the test apparatus main body 102 that accommodates the interior of the test apparatus main body 102 at a predetermined temperature (eg, −40 to +95). And an air conditioner 103 that creates a predetermined environmental state by maintaining the temperature at (° C.). The air conditioner 103 includes a thermostatic chamber 104 having a thermostatic chamber 104a therein, and an air conditioning chamber (not shown) that adjusts the temperature of the thermostatic chamber 104a to a predetermined temperature. In addition, as such an environmental test apparatus, various proposals, such as what was shown by the following patent document 1, etc., are made | formed.

JP-A-7-293972

However, in the above-described conventional air conditioner 103 for environmental testing, the entire test apparatus main body 102 is sometimes referred to as a large-sized thermostatic chamber 104 (a person that can enter a person is referred to as a “walk-in chamber”). ) To carry out the test, it takes time to move the test apparatus main body 102 to the place where the constant temperature bath 104 is installed.
Moreover, since the thermostat 104 is large, a large installation space is required, and it takes time to install the apparatus.
Furthermore, since the thermostat 104 is large, a heater or refrigerator having a large capacity is required in the air-conditioning room. For this reason, there exists a problem that running cost is high.

  The present invention has been made in view of such circumstances, and an environmental test air conditioner that can reduce the size of the apparatus and reduce the running cost can be reduced with less time and effort for the environmental test. The purpose is to provide.

In order to solve the above problems, the environmental testing air conditioner of the present invention employs the following means.
That is, the air conditioner for environmental testing according to the present invention includes the test object in the main body of the environmental test apparatus having a test mechanism unit that installs the test object and causes the test object to perform a predetermined operation for the environmental test. An environmental test air conditioner for maintaining ambient air at a predetermined temperature in accordance with an environmental test, wherein the test mechanism unit is a part of the environmental test apparatus main body and the test object is installed And a thermostat bath that is hermetically attached to the environmental test apparatus main body to form a temperature-controlled room in the internal space, and the temperature of the temperature-controlled room And a constant temperature unit that adjusts the temperature to a predetermined temperature according to an environmental test.

In this way, the thermostatic chamber is configured to be attached to a part of the environmental test apparatus main body so that a thermostatic chamber for performing an environmental test is formed therein. Therefore, the thermostatic bath is simply attached to the environmental test apparatus main body. Can conduct environmental tests. As described above, in the conventional environmental test, it is necessary to move the environmental test apparatus main body to a large constant temperature bath and carry it in, and it takes time to carry out the test. There is no need for trouble. Therefore, the labor required for performing the test is small.
In addition, the thermostatic chamber is used by covering the device under test and the test mechanism portion of the environmental test apparatus main body, and thus can be downsized as compared with the conventional one, and does not require a large installation space. .
Moreover, since the thermostat can be downsized, the heater and refrigerator of the thermostat unit that performs air conditioning can be made smaller in capacity than the conventional one. Therefore, manufacturing cost and running cost can be reduced.

  Further, in the environmental test air conditioner according to the present invention, the thermostat has an air supply port for introducing the air whose temperature is adjusted by the thermostat unit into the thermostatic chamber and an exhaust port for exhausting the air. The unit is provided with a ventilation path for returning air whose temperature has been adjusted through the exhaust port and returning the temperature to the air supply port, and the introduced air is introduced into the air supply side. It has a blower that sends out and circulates air in the temperature-controlled room, a heating means that heats the air, and a cooling means that cools the air.

  Thus, the thermostatic chamber has an air supply port and an exhaust port, and since the airflow path of the thermostatic unit has a blower, a heating unit, and a cooling unit, air whose temperature is adjusted by the heating unit and the cooling unit is supplied to the thermostatic chamber. And can be circulated between the thermostat unit. Therefore, the air temperature distribution in the temperature-controlled room is made uniform by this circulation flow.

  In the environmental test air conditioner according to the present invention, the thermostatic chamber and the thermostatic unit include a flexible air supply duct for supplying temperature-controlled air to the thermostatic chamber, and air in the thermostatic chamber. Are connected to each other by a flexible return air duct that returns the air to the ventilation path.

  In this way, the thermostatic chamber and the thermostatic unit are connected by the flexible air supply duct and return air duct. Therefore, when carrying out the test, place the environmental test air conditioner in the vicinity of the main body of the environmental test apparatus. After positioning, only the thermostat can be moved and attached to the environmental test apparatus main body while the thermostat unit is placed on the floor. Therefore, it is possible to easily perform the operation of putting the thermostat bath on the environmental test apparatus main body and the adjustment operation of the attachment position.

  In the environmental test air conditioner according to the present invention, the thermostatic chamber is provided on one end side of the temperature-controlled room sandwiching the accommodation area of the device under test, and air is introduced from the air supply port on the one end side. An introduction chamber that blows out along the wall surface, and is provided on the other end side of the temperature-controlled room that sandwiches the accommodation area of the device under test, takes air from the temperature-controlled room along the wall surface on the other end side, and exhausts it from the exhaust port And an exhaust chamber.

  As described above, the introduction chamber is provided at one end side of the accommodation area of the DUT in the temperature-controlled room, and the exhaust chamber is provided at the other end side, so that air is blown out or taken in from the wall surface side of the temperature-controlled room, respectively. Therefore, the air flow in the temperature-controlled room is formed so as to pass through the entire accommodation area of the device under test. Therefore, the air temperature distribution in the temperature-controlled room is made uniform.

  In the environmental test air conditioner according to the present invention, the thermostatic chamber has a large number of vent holes provided in the vicinity of one end side of the thermostatic chamber, and air that has flowed out of the introduction chamber flows from the vent holes to the thermostatic chamber. The air supply side rectification member which blows out toward the other end side of this is provided, It is characterized by the above-mentioned.

  As described above, since the air supply side rectifying member is provided with a large number of ventilation holes, the air from the introduction chamber can be blown out with a large range of the ventilation holes. Therefore, the temperature distribution of the air flowing to the device under test is made uniform.

  Further, in the environmental test air conditioner according to the present invention, the thermostatic chamber is provided in the vicinity of the other end portion side of the temperature-controlled room so as to face the one end side, and has a plurality of ventilation holes, and the air of the temperature-controlled room An exhaust-side rectifying member that sucks air from the vent hole and flows to the exhaust chamber is provided.

  Thus, since the exhaust side rectification member is provided with a large number of ventilation holes, the air in the temperature-controlled room can be sucked in a wide range by the large number of air holes. For this reason, the air flow around the exhaust-side rectifying member of the temperature-controlled room is made uniform. Therefore, the air temperature distribution in the temperature-controlled room is made uniform.

  In the environmental test air conditioner according to the present invention, the constant temperature unit includes a humidifying unit that humidifies air flowing through the ventilation path, a dehumidified air introduction unit that dehumidifies outside air and introduces the air into the ventilation path, and the ventilation unit. And an exhaust means for exhausting a part of the air in the passage.

In this way, since the air can be humidified by the humidifying means and the dehumidified air can be introduced by the dehumidified air introducing means, the humidity of the air in the temperature-controlled room can be adjusted. Therefore, the environmental test of the device under test can be performed under desired humidity conditions.
In addition, since a part of the air in the ventilation path can be exhausted by the exhaust means, the air corresponding to the amount of air introduced by the dehumidified air introduction means is exhausted to the outside, and the pressure in the temperature-controlled room is kept constant. can do.

  In the environmental test air conditioner according to the present invention, the constant temperature unit sequentially connects a compressor, a condenser, a liquid receiver, an opening variable expansion valve, and an evaporator as the cooling means. A refrigerator having a refrigeration circuit is provided.

  Thus, since the opening degree variable expansion valve is incorporated in the refrigeration circuit of the refrigerator, the temperature of the evaporator can be adjusted by adjusting the opening degree. Therefore, the air cooling temperature adjustment capability is high and the temperature uniformity is also good.

  Moreover, in the environmental test air conditioner according to the present invention, the refrigerator is located between the evaporator and the compressor on the refrigeration circuit, outside the ventilation path, and the evaporator. It has another 2nd evaporator, It is comprised so that the refrigerant | coolant which was not evaporated by the said evaporator may be evaporated by the said 2nd evaporator.

Thus, since the refrigerant that has not evaporated in the evaporator is configured to be evaporated by the second evaporator, even when the evaporation temperature of the refrigerant in the evaporator is increased, the heat load corresponding to the increase in the refrigeration capacity Obtain from the outside air, do not use the heater.
Therefore, even when the evaporation temperature of the refrigerant is raised, there is no need to apply a heat load by the heater, which saves energy. Moreover, since no heater is used, the temperature distribution of the temperature-adjusted air is good.

  According to the air conditioner for an environmental test of the present invention, it is possible to obtain an excellent effect that the labor required for carrying out the environmental test is small, the apparatus can be downsized, and the running cost can be kept low.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.

[First Embodiment]
The first embodiment of the present invention will be described below.
FIG. 1 is a diagram showing a schematic configuration of an environmental test air conditioner 1 according to the first embodiment and an environmental test apparatus main body 20.
The environmental test apparatus main body 20 includes a test mechanism unit 21, a base unit 22, a device storage unit 23, and a carriage 24.
The test mechanism unit 21 can be installed by fixing or placing the device under test 10 and is a mechanism for causing the device under test 10 to perform a predetermined operation for an environmental test. As the DUT 10, for example, parts (automobile parts such as wipers and turn signals, electrical parts, mechanical parts, etc.) are targeted.
On the base part 22, a test mechanism part 21 is installed. A heat insulating material (heat insulating material) is embedded in the lower portion of the base portion 22, and the heat insulating effect of the heat insulating material provides heat insulation between the test mechanism unit 21 side and the device storage unit 23 side. Further, a mounting bracket 12b (fixing tool) for mounting a thermostatic chamber 2 described later is provided on the outer peripheral portion of the base portion 22.
A motor and a control device (not shown) for driving the test mechanism unit 21 are stored in the device storage unit 23.
A caster 25 is provided at the bottom of the carriage 24.

  The environmental test air conditioner 1 is an apparatus for maintaining the ambient air around the DUT 10 in the environmental test apparatus main body 20 at a predetermined temperature according to the environmental test. The environmental test air conditioner 1 is attached to the environmental test apparatus main body 20 to form a thermostatic chamber 2a inside, a thermostatic chamber 4 that adjusts the temperature of the thermostatic chamber 2a to a predetermined temperature, and the thermostatic chamber 2 and thermostatic chamber. The air supply duct 6 and the return air duct 7 are connected to the unit 4. A caster 8 is provided below the constant temperature unit 4.

The constant temperature bath 2 is configured to cover a portion of the environment test apparatus main body 1 and include a test mechanism portion 21 in a state in which the device under test 10 is installed, and can be accommodated therein. In the present embodiment, the thermostatic chamber 2 has a substantially rectangular parallelepiped shape, and has a hollow shape with an open bottom.
And the thermostat 2 is attached to the environmental test apparatus main body 20 airtightly, and forms the thermostat 2a in the internal space. In the present embodiment, the thermostatic chamber 2 is mounted on the base portion 22 of the environmental test apparatus main body 20 and is fixed by the mounting bracket 12a provided in the thermostatic bath 2 and the mounting bracket 12b provided in the base portion 22 described above.
In addition, a sealing member (not shown) such as an O-ring is provided on the contact surface of the thermostatic chamber 2 with the environmental test apparatus main body 20 to keep the inside and outside of the thermostatic chamber 2a airtight.
In the present embodiment, the thermostat 2 has a rectangular parallelepiped shape, but the present invention is not limited to this, and the shape and size are appropriately set according to the type, shape, size, and the like of the environmental test apparatus main body 20. Can be set.

FIG. 2 is a diagram illustrating a configuration of the thermostatic chamber 2 in the present embodiment. The wall forming the thermostat 2 has a heat insulating layer formed of a heat insulating material (heat insulating material) inside, and the outer wall can be made of a metal such as aluminum, a resin, or the like.
As shown in FIG. 2, in the present embodiment, the constant temperature bath 2 can remove a part 2 </ b> A of the upper wall portion, and the removed portion serves as an observation window 11. The portion of the observation window 11 can be made of a highly transparent material such as acrylic glass or polycarbonate. Since it is comprised in this way, during implementation of an environmental test, a part of upper wall part can be removed as needed, and the operation state of the to-be-tested object 10 can be confirmed.

In addition, the thermostatic chamber 2 is formed with an air supply port 14 for introducing the air whose temperature is adjusted by the thermostatic unit 4 into the thermostatic chamber 2a, and an exhaust port 15 for exhausting the air in the thermostatic chamber 2a.
In the present embodiment, the air supply port 14 and the exhaust port 15 are formed in the upper part on both sides of the specimen accommodation region in the temperature-controlled room 2a, but the position can be determined according to the situation.

The thermostat 2 has an introduction chamber 17 and an exhaust chamber 18.
The introduction chamber 17 is provided on one end side (left side in FIG. 2) of the temperature-controlled room 2a with the specimen accommodation area interposed therebetween. The introduction chamber 17 is formed in the interior surrounded by the wall portion of the thermostatic chamber 2 and the introduction chamber forming member 17a.
The introduction chamber forming member 17a is formed such that a gap t is formed between the temperature chamber 2 and the wall portion on the one end side. The gap t is formed to extend in a direction perpendicular to the air flow direction in the temperature-controlled room 2a (a direction perpendicular to the paper surface in FIG. 2).
With the introduction chamber 17 having such a configuration, air is introduced from the air supply port 14 and blown out along the wall surface on the one end side.

The exhaust chamber 18 is provided on the other end side (right side in FIG. 2) of the temperature-controlled room 2a with the specimen accommodation area interposed therebetween. The exhaust chamber 18 is formed in the interior surrounded by the wall portion of the thermostatic chamber 2 and the exhaust chamber forming member 18a.
The exhaust chamber forming member 18a is formed such that a gap t is formed between the temperature chamber 2 and the wall portion on the other end side. Similar to the introduction chamber 17 described above, the gap t is formed so as to extend in a direction perpendicular to the air flow direction in the temperature-controlled room 2a (direction perpendicular to the paper surface in FIG. 2).
By the exhaust chamber 18 having such a configuration, the air in the temperature-controlled room 2a is taken in along the wall surface on the other end side and exhausted from the exhaust port 15.

In addition, although both the introduction chamber forming member 17a and the exhaust chamber forming member 18a in this embodiment are formed in an L-shaped cross section, various shapes can be changed as long as the above-described functions can be exhibited. For example, it may be formed in a circular arc shape in cross section.
In addition, the gap t between the introduction chamber and the exhaust chamber is not necessarily the same.

FIG. 3 is a diagram showing a system configuration of the environmental test air conditioner 1 according to the present embodiment.
As shown in FIG. 3, the thermostatic chamber 2 and the thermostatic unit 4 are connected to each other by an air supply duct 6 and a return air duct 7.
One end of the air supply duct 6 is connected to the air supply port 14 of the thermostat 2 and the other end is connected to the outlet of the air passage 31 of the thermostat unit 4 to be described later, and the temperature-adjusted air A is supplied to the thermostatic chamber 2a. It comes to send.
One end of the return air duct 7 is connected to the exhaust port 15 of the thermostatic chamber 2, and the other end is connected to the inlet of the ventilation path 31 of the constant temperature unit 4 so that the air in the constant temperature chamber 2 a is returned to the ventilation path 31. It has become.
The air supply duct 6 and the return air duct 7 are both made of a material having flexibility (flexibility) and heat insulation.

The constant temperature unit 4 includes a ventilation path 31, a blower 32, a heater 33, a refrigerator 40, a control unit 50, and the like as main components.
The ventilation path 31 has a function of returning the air A that has been temperature-adjusted by taking in the air A through the exhaust port 15 of the thermostatic chamber 2 to the air supply port 14.
The blower 32 is provided in the ventilation path 31, the rotation speed is controlled under the control of the control unit 50, and the air taken in from the exhaust port 15 of the thermostatic bath 2 is sent to the air supply port 14 side and is sent to the temperature-controlled room. Air is circulated in 2a.
Under the control of the control unit 50, the heater 33 is temperature-adjusted by the temperature regulator 35 and heats the air flowing through the ventilation path 31. That is, the heater 33 functions as a heating unit. Further, a thermometer 34 is attached to the heater 33, and the temperature is monitored to prevent overheating.

The refrigerator 40 includes a compressor 41 that compresses the refrigerant, a condenser 42 that condenses and liquefies the refrigerant, a liquid receiver 43 that temporarily stores the liquefied refrigerant, and a variable pressure expansion of the refrigerant from the liquid receiver 43. The refrigeration circuit is formed by sequentially connecting a variable opening degree expansion valve 44 to be connected to an evaporator 45 that is provided in the ventilation path 31 and expands and vaporizes the refrigerant to cool the air flowing through the ventilation path 31.
The compressor 41 is preferably an inverter compressor having a variable operating frequency, whereby the refrigerant capacity can be changed to adjust the refrigeration capacity.
Further, the degree of decompression of the refrigerant can be changed by adjusting the opening degree of the opening degree variable expansion valve 44, and the temperature of the evaporator 45 can be adjusted. The opening variable expansion valve 44 is preferably an electronic expansion valve, but the opening may be adjusted by a manual expansion valve.
The refrigerator 40 configured as described above cools the air flowing in the ventilation path 31 under the control of the control unit 50.

The constant temperature unit 4 includes a humidifier 52 as a humidifying means for humidifying the air flowing through the ventilation path 31, a dehumidified air introduction means 54 for dehumidifying outside air and introducing the air into the ventilation path 31, and the air in the ventilation path 31. And an exhaust means 60 for exhausting a part.
The humidifier 52 is temperature-adjusted by a temperature regulator 53 under the control of the control unit 50, and supplies humidified air into the ventilation path 31.
Further, the humidified air from the humidifier 52 is introduced into the ventilation path 31 from the upstream side of the blower 32, whereby the humidified air is agitated by the blower 32 to be uniformized. ing.

In the present embodiment, the dehumidified air introduction means 54 includes an air introduction pipe 55 that introduces outside air into the ventilation path 31, an air filter 56 that removes dust contained in the outside air, a dehumidifier 57 that dehumidifies the outside air, and a flow rate. A total 58 and a flow control valve 59 are provided.
The dehumidifier 57 can be composed of, for example, a membrane air dryer. The membrane air dryer is a dehumidifier having a filter made of a polymer film that is easy to pass water vapor but difficult to pass air (oxygen and nitrogen).
The flow control valve 59 adjusts the amount of outside air introduced under the control of the control unit 50.

  The exhaust means 60 exhausts air corresponding to the amount of air due to introduction of humidified air by the humidifier 52 and introduction of outside air by the dehumidified air introduction means 54 to keep the pressure in the temperature-controlled room 2a constant. .

  A thermometer 36 and a hygrometer 37 are installed in the thermostatic chamber 2 a of the thermostatic chamber 2, and detection signals thereof are input to the control unit 50. Reference numeral 61 denotes a drain that discharges water droplets generated in the ventilation path 31.

Next, the operation of the environmental test air conditioner 1 configured as described above will be described.
First, as shown in FIG. 1, the environmental test air conditioner 1 is positioned in the vicinity of the environmental test apparatus main body 20 in which the device under test 10 is installed. Then, the thermostatic bath 2 is covered and firmly fixed by the mounting brackets 12a and 12b.
Next, air is taken in from the thermostat 2 by the thermostat unit 4, the temperature of the air is adjusted by either heating by the heater 33 and cooling by the evaporator 45 or a combination thereof, and returned to the thermostat 2 to circulate, The inside of the temperature-controlled room 2a is maintained at a predetermined temperature (for example, −40 to + 95 ° C.) to create a predetermined environmental state. Further, the humidity is adjusted by the humidifier 52 and the dehumidified air introducing means 54 as necessary.
In the temperature-controlled room 2a that has created the environmental conditions in this way, the test mechanism unit 21 of the environmental test apparatus body 20 is driven to cause the device under test 10 to perform a predetermined operation, thereby inspecting the operating state of the device under test 10. To do.
In addition, the temperature in the temperature-controlled room 2a is not restricted to said range, It may be below the said temperature or above the said temperature.

Next, functions and effects of the environmental test air conditioner 1 according to the present embodiment will be described.
According to the environmental test air conditioner 1 according to the present embodiment, the thermostatic chamber 2 is configured to be attached to a part of the environmental test apparatus main body 20 so that a constant temperature chamber 2a for performing an environmental test is formed therein. Therefore, the environmental test can be performed only by attaching the thermostat 2 to the environmental test apparatus main body 20.
As described above, in the conventional environmental test, it is necessary to move the environmental test apparatus main body to a large constant temperature bath and carry it in, and it takes time to carry out the test. There is no need for trouble. Therefore, the labor required for performing the test is small.
In addition, since the thermostatic chamber is used by covering the device under test 10 and the test mechanism unit 21 in the environmental test apparatus main body 20, it can be downsized as compared with the conventional one and has a wide installation space. do not need.
Moreover, since the thermostat 2 can be miniaturized, the heater 33 and the refrigerator 40 of the thermostat unit that performs air conditioning can be made smaller in capacity than the conventional one. Therefore, manufacturing cost and running cost can be reduced.

  Further, in the environmental test air conditioner 1 according to the present embodiment, the air whose temperature has been adjusted by the heater 33 and the evaporator 45 is circulated between the thermostatic chamber 2 and the thermostatic unit 4. The air temperature distribution in 2a is made uniform.

  Moreover, since the thermostat 2 and the thermostat unit 4 are connected by the flexible air supply duct 6 and the return air duct 7, the environmental test air conditioner 1 is used as the main body of the environmental test apparatus when performing the test. After positioning in the vicinity of 20, only the thermostat 2 can be moved and attached to the environmental test apparatus main body 20 with the thermostat unit 4 placed on the floor. Therefore, it is possible to easily perform the operation of covering the thermostat 2 on the environmental test apparatus main body 20 and the operation of adjusting the attachment position.

  In addition, as shown in FIG. 2, an introduction chamber 17 is provided at one end side of the specimen accommodation region in the temperature-controlled room 2a, and an exhaust chamber 18 is provided at the other end side. Since the air is blown out or taken in from the side, the air flow in the temperature-controlled room 2a is formed so as to pass through the entire specimen accommodation region. Therefore, the air temperature distribution in the temperature-controlled room 2a is made uniform.

Moreover, since the humidifier 52 can humidify the air and the dehumidified air introduction means 54 can introduce the dehumidified air, the humidity of the air in the temperature-controlled room 2a can be adjusted. Therefore, the environmental test of the device under test 10 can be performed under desired humidity conditions.
In addition, since a part of the air in the ventilation path 31 can be exhausted by the exhaust means 60, air corresponding to the amount of air introduced by the dehumidified air introduction means 54 is exhausted to the outside, and the inside of the temperature-controlled room 2a The pressure can be kept constant.

  Moreover, since the opening degree variable expansion valve 44 is incorporated in the refrigeration circuit of the refrigerator 40, the temperature of the evaporator 45 can be adjusted by adjusting the opening degree. Therefore, the air cooling temperature adjustment capability is high and the temperature uniformity is also good.

[Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described.
FIG. 4 is a cross-sectional view showing the configuration of the thermostatic chamber 2 applied to the environmental test air conditioner according to the second embodiment. In FIG. 4, (B) is an XX arrow view in (A).
As shown in FIG. 4A, an air supply side rectifying member 63 is provided in the thermostatic chamber 2 in the present embodiment. The air supply side rectifying member 63 is provided in the vicinity of one end side (left side in the figure) of the temperature-controlled room 2a so as to partition the region on the outlet side of the introduction chamber 17 from the region to be tested.
As shown in FIG. 4B, the air supply side rectifying member 63 has a large number of ventilation holes 63a.
Since the air supply side rectifying member 63 is configured as described above, the air flowing out from the introduction chamber 17 is directed from the vent hole 63a toward the other end side (right side in the figure) of the temperature-controlled room 2a, that is, the specimen accommodation region. To blow out.

In addition, the thermostatic chamber 2 in the present embodiment is provided with an exhaust-side rectifying member 64. The exhaust side rectification member 64 is provided in the vicinity of the other end side (right side in the drawing) of the temperature-controlled room 2a so as to partition the region on the inlet side of the exhaust chamber 18 and the region to be tested. Also. The exhaust side rectifying member 64 also has a large number of vent holes 64a, similar to the air supply side rectifying member 63 described above.
Since the exhaust side rectification member 64 is configured in this way, the air of the temperature-controlled room 2a is sucked from the vent hole 64a and flows into the exhaust chamber 18.

  The structure of the other part of the environmental test air conditioner according to this embodiment is the same as that of the first embodiment described above.

Next, functions and effects of the environmental test air conditioner according to the present embodiment will be described.
According to the environmental test air conditioner according to the present embodiment, since the air supply side rectifying member 63 is provided with a large number of vent holes 63a, the range of the air from the introduction chamber 17 is expanded by the large number of vent holes 63a. And can be blown out. Therefore, since the air flow is uniform, the temperature distribution of the air flowing to the device under test 10 is also made uniform.

  Further, since the exhaust side rectifying member 64 is provided with a large number of ventilation holes 64a, the air in the temperature-controlled room 2a can be sucked in a wide range by the large number of air holes 64a. For this reason, the flow of air around the exhaust-side rectifying member 64 is made uniform. Therefore, the air temperature distribution in the temperature-controlled room 2a is made uniform.

[Third Embodiment]
Hereinafter, a third embodiment of the present invention will be described.
FIG. 5 is a diagram showing a configuration of a refrigerator applied to the environmental test air-conditioning apparatus according to the third embodiment.
As shown in FIG. 5, the refrigeration circuit of the refrigerator 40 in the present embodiment is obtained by adding a second evaporator 46 to the configuration of the refrigeration circuit in the first embodiment described above.
The second evaporator 46 is provided between the evaporator 45 and the compressor 41 on the refrigeration circuit and outside the ventilation path 31, and all the refrigerant that has not evaporated in the evaporator 45 is removed. It is configured to evaporate. The air that exchanges heat with the refrigerant in the second evaporator 45 is outside air (for example, air in a test chamber in which an air conditioner for environmental testing is installed).

  The configuration of the other parts of the environmental test air conditioner according to this embodiment is the same as that of the first or second embodiment described above.

Next, functions and effects of the environmental test air conditioner according to the present embodiment will be described.
In a conventional refrigerator, a set of solenoid valves and expansion valves set at different evaporation temperatures (for example, −40 ° C., −20 ° C., 0 ° C.) is connected in parallel to change the evaporation temperature of the refrigerant in the evaporator. When switching, the expansion valve through which the refrigerant passes is switched by ON / OFF of the electromagnetic valve.
Moreover, in said 1st Embodiment, the evaporation temperature of the refrigerant | coolant in the evaporator 45 is adjusted by adjusting the opening degree of the opening degree variable expansion valve 44. FIG.
Here, when the evaporation temperature of the refrigerant in the evaporator is increased, the refrigeration capacity of the refrigerator increases (for example, in a certain refrigerator, the refrigeration capacity at −45 ° C. is 1.82 kW, whereas at −5 ° C. The refrigerating capacity is 8.48 kW.)
For this reason, all of the refrigerant is initially evaporated (gasified) in the evaporator, but when the temperature of the temperature-adjusted air gradually cools, all of the refrigerant does not evaporate, leaving an unevaporated component (liquid refrigerant). become.
When refrigerant (liquid) enters the compressor, it causes failure or stoppage. Therefore, when the above evaporation temperature rises, it is common to apply a heat load with a heater to evaporate (gasify) all the refrigerant.

However, since the heat load of such a heater is exhausted by the condenser of the refrigerator, there is a problem that the energy consumption is large and the temperature distribution is deteriorated.
On the other hand, the air conditioner for environmental test according to the present embodiment is configured to evaporate the refrigerant that has not evaporated in the evaporator by the second evaporator, and heat for evaporating all the refrigerant. The load comes from outside air. That is, even when the evaporation temperature of the refrigerant in the evaporator 45 is increased, the heat load corresponding to the increase in the refrigerating capacity is obtained from the outside air, and the heater 33 is not used.
As described above, according to the air conditioner for an environmental test according to the present embodiment, even when the evaporation temperature of the refrigerant is increased, it is not necessary to apply a heat load by the heater, which saves energy. Moreover, since no heater is used, the temperature distribution of the temperature-adjusted air is good.

  As described above, according to the air conditioner for environmental testing of the present invention, there is less labor required for carrying out the environmental test, the device can be downsized, and the running cost can be kept low. Is obtained.

In the above embodiment (FIG. 3), the blower 32 is attached in front of the heater 33 and the evaporator 45, but may be attached after the heater 33 and the evaporator 45.
In addition, this invention is not limited to embodiment mentioned above, Of course, it can change variously in the range which does not deviate from the summary of this invention.

It is a figure which shows schematic structure of the air conditioner for environmental tests concerning 1st Embodiment of this invention. It is a figure which shows the structure of the thermostat applied to the air conditioner for environmental tests concerning 1st Embodiment of this invention. It is a figure which shows the system configuration | structure of the air conditioner for environmental tests concerning 1st Embodiment of this invention. It is a figure which shows the structure of the thermostat applied to the air conditioner for environmental tests concerning 2nd Embodiment of this invention. It is a figure which shows the structure of the refrigerator applied to the air conditioner for environmental tests concerning 3rd Embodiment of this invention. It is a figure explaining a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Environmental test air conditioner 2 Constant temperature chamber 2a Constant temperature chamber 4 Constant temperature unit 6 Supply air duct 7 Return air duct 8 Caster 10 Test object 11 Observation window 12a, 12b Mounting bracket 14 Supply port 15 Exhaust port 17 Introduction chamber 17a Introduction chamber Forming member 18 Exhaust chamber 18a Exhaust chamber forming member 20 Environmental test apparatus main body 21 Test mechanism part 22 Base part 23 Equipment storage part 24 Carriage 25 Caster 31 Ventilation path 32 Blower 33 Heater 34 Thermometer 35 Temperature controller 36 Thermometer 37 Hygrometer 40 Refrigerator 41 Compressor 42 Condenser 43 Receiver 44 Opening Variable Variable Valve 45 Evaporator 46 Second Evaporator 50 Control Unit 52 Humidifier 53 Temperature Controller 54 Dehumidified Air Introducing Means 55 Air Introducing Pipe 56 Air Filter 57 Dehumidifier 58 Flow meter 59 Flow control valve 60 Exhaust means 61 Drain 63 Supply side rectification Material 64 exhaust side rectifying member 63a, 63b vent holes

Claims (9)

An ambient air around the test object in an environmental test apparatus main body having a test mechanism for installing the test object and performing a predetermined operation for the environmental test on the test object is set to a predetermined temperature according to the environmental test. An air conditioner for environmental testing for holding,
A part of the environmental test apparatus main body, which is configured to cover the inside of the part including the test mechanism portion in a state where the device under test is installed and to be accommodated therein, and is attached to the environmental test apparatus main body in an airtight manner A thermostatic chamber that forms a thermostatic chamber in the interior space,
A thermostat unit that adjusts the temperature of the thermostatic chamber to a predetermined temperature according to an environmental test of the device under test;
An air conditioner for an environmental test characterized by that. The thermostatic chamber has an air supply port for introducing the temperature-adjusted air into the temperature-controlled room and an exhaust port for exhausting the air.
The constant temperature unit is provided with a ventilation path that takes air that has been temperature-adjusted through the exhaust port and returns the temperature-adjusted air to the supply port, and the intake air is introduced into the ventilation port in the ventilation path. A blower that circulates air into the temperature-controlled room, a heating unit that heats the air, and a cooling unit that cools the air,
The air conditioner for an environmental test according to claim 1.   The thermostat and the thermostat unit are a flexible air supply duct for supplying temperature-controlled air to the temperature-controlled room, and a flexible return air for returning the air in the temperature-controlled room to the ventilation path. The environmental test air conditioner according to claim 2, wherein the air conditioners are connected to each other by a duct.   The thermostatic chamber is provided on one end side of the temperature-controlled room sandwiching the accommodation area of the object to be tested, introduces air from the air supply port, and blows out along the wall surface on the one end side; An exhaust chamber that is provided on the other end side across the accommodation region of the device under test and that takes in the air of the temperature-controlled room along the wall surface on the other end side and exhausts it from the exhaust port. The environmental test air conditioner according to claim 2 or 3.   The thermostatic chamber is provided near one end of the temperature-controlled room, has a large number of ventilation holes, and supplies air on the air supply side rectifying member that blows out the air flowing out from the introduction chamber toward the other end of the temperature-controlled room The air conditioner for environmental testing according to claim 4, comprising:   The thermostatic chamber is provided in the vicinity of the other end of the temperature-controlled room so as to face the one end side, and has a large number of ventilation holes, and exhausts air from the temperature-controlled room through the ventilation holes and flows into the exhaust chamber The environmental test air conditioner according to claim 4, further comprising a side rectifying member.   The constant temperature unit includes humidifying means for humidifying air flowing through the ventilation path, dehumidified air introduction means for dehumidifying outside air and introducing the air into the ventilation path, and exhaust means for exhausting a part of the air in the ventilation path. The air conditioner for an environmental test according to any one of claims 2 to 6, characterized by comprising:   The constant temperature unit includes a refrigerator having a refrigeration circuit formed by sequentially connecting a compressor, a condenser, a liquid receiver, an opening variable expansion valve, and an evaporator serving as the cooling means. The environmental test air conditioner according to claim 2, wherein:   The refrigerator has a second evaporator separate from the evaporator at a position between the evaporator and the compressor on the refrigeration circuit and outside the ventilation path. The environmental test air conditioner according to claim 8, wherein the refrigerant that has not evaporated in the evaporator is configured to evaporate by the second evaporator.

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