CN113311888B

CN113311888B - Environment forming device

Info

Publication number: CN113311888B
Application number: CN202110206073.6A
Authority: CN
Inventors: 石田雅昭
Original assignee: Espec Corp
Current assignee: Espec Corp
Priority date: 2020-02-26
Filing date: 2021-02-24
Publication date: 2023-05-16
Anticipated expiration: 2041-02-24
Also published as: CN113311888A; DE102021104373A1; JP2023073406A

Abstract

The invention provides an environment test device (1) comprising: a laboratory (3) for accommodating a test object; an air conditioning chamber (4) communicating with the test chamber; a cooler (11) and a main heater (12) for generating air-conditioned air by adjusting the temperature of air flowing into the air-conditioning chamber from a first wall surface (7) of the laboratory; an air supply fan (13) which is arranged in a plurality of directions on the side of a second wall surface (9) of the laboratory opposite to the first wall surface (7) and which sends out air-conditioned air from the air-conditioned room to the laboratory in a direction from the second wall surface (9) toward the first wall surface (7); and a control unit (30) for individually controlling the rotational speeds of the plurality of blower fans (13). Accordingly, the temperature distribution in the internal space of the laboratory (3) can be finely controlled.

Description

Environment forming device

Technical Field

The present invention relates to an environment forming apparatus, and more particularly, to an environment forming apparatus capable of finely controlling a temperature distribution of an internal space of an environment forming chamber in which an object is housed.

Background

As a test for evaluating performance or the like of an object to be tested such as an electronic component, an environmental test is known. In the environmental test, the performance and the like of an object to be tested are evaluated by applying an environmental pressure such as a temperature to the object to be tested stored in a laboratory. Further, as a device for performing an environmental test, an environmental test device is known. An environmental test apparatus according to the related art includes: a laboratory surrounded by a heat-insulating frame; an air conditioning chamber in communication with the test chamber; an air conditioning apparatus such as a heater and a cooler disposed in an air conditioning room; and a blower for sending the air-conditioning air generated by the air-conditioning device out of the ventilation path of the air-conditioning chamber to the test chamber. As the blower, 1 blower fan is disposed so as to be located on one side wall side of the laboratory.

Further, japanese patent laying-open No. 5969968 discloses an environment test apparatus comprising: an air conditioner disposed in the temperature adjusting part above the laboratory; 2 centrifugal fans arranged in the temperature adjusting part along the left and right direction; and a plurality of temperature sensors for detecting a temperature distribution in the test chamber. A plurality of ventilation openings are formed in the first partition wall separating the laboratory from the air supply passage extending downward from the temperature adjusting section, the ventilation openings being arranged in the vertical and horizontal directions. Similarly, a plurality of ventilation openings are formed in the second partition wall facing the first partition wall and partitioning the laboratory and the exhaust passage extending downward from the temperature adjusting portion, the ventilation openings being arranged in the vertical and horizontal directions. The air-conditioning air sent from the centrifugal fan is guided downward from the temperature adjusting unit by the air-sending passage, and sent from the ventilation opening of the first partition wall to the laboratory. The delivered air conditioner is discharged from the ventilation opening of the second partition wall after passing through the laboratory, and is guided to the upper temperature adjusting part through the exhaust passage. In this environmental test apparatus, the respective air-sending amounts of the 2 centrifugal fans are individually adjusted based on the detection result of the temperature sensor so as to send out the air-conditioned air to the region with a large temperature difference in the internal space of the laboratory with emphasis, thereby making the temperature distribution in the laboratory uniform.

According to the environmental test apparatus of the background art, since 1 blower fan is disposed in the substantially central portion of the side wall, the amount of air blown out to the peripheral portion of the internal space of the laboratory is relatively smaller than the amount of air blown out to the central portion. Therefore, a temperature difference may occur between the peripheral portion and the central portion in the internal space of the laboratory. In the case where a plurality of objects to be tested are placed in a test chamber, the air-conditioning air sent from the blower may be blocked by the upstream object to be tested, and may not reach the downstream object to be tested, and a temperature difference may occur between the upstream side and the downstream side of the air flow path in the internal space of the test chamber. As a result, according to the environmental test apparatus of the background art, there are cases where unexpected variations occur in the temperature distribution in the internal space of the laboratory due to various reasons.

According to the environment testing device disclosed in japanese patent publication No. 5969968, the air volumes of the left and right half areas in the test room can be made different from each other by individually controlling the air volumes of the 2 centrifugal fans arranged in the left-right direction. However, in each of the left half area and the right half area, for example, if the air flow rate of the centrifugal fan on the left side increases, the air flow rate in the left half area increases as a whole, and if the air flow rate of the centrifugal fan on the right side decreases, the air flow rate in the right half area decreases as a whole. That is, air volume control is not possible in which only a part of the air volume in each of the left and right half areas is increased or decreased. Therefore, according to the environmental test apparatus disclosed in japanese patent publication No. 5969968, when the temperature distribution in the internal space of the laboratory is controlled, the control fineness may be insufficient.

In addition, in the environmental test apparatus disclosed in japanese patent publication No. 5969968, the control target is to make the temperature distribution of the internal space of the laboratory uniform. However, since the temperature distribution is not necessarily uniform depending on the content of the test process in the environmental test, it is desirable to realize a device for forming a desired temperature distribution including a non-uniform temperature distribution in the test chamber depending on the content of the test process.

Disclosure of Invention

The invention aims to provide an environment forming device capable of finely controlling the temperature distribution of the inner space of an environment forming chamber for accommodating an object.

An environment forming apparatus according to an aspect of the present invention includes: an environment forming chamber for accommodating an object; an air conditioning chamber communicating with the environment forming chamber; a first air conditioning unit that generates air-conditioning air by adjusting a temperature of air flowing into the air-conditioning chamber from a first wall surface side of the environment-forming chamber; a plurality of blower fans arranged in a plurality of directions on a second wall surface side of the environment-forming chamber opposite to the first wall surface, and configured to send out air-conditioning air from the air-conditioning chamber to the environment-forming chamber in a direction from the second wall surface to the first wall surface; a control unit that individually controls the rotational speeds of the respective air blowing fans; a plurality of first temperature detection means arranged at a plurality of locations on the first wall surface side; and a plurality of second air conditioning units disposed in correspondence with the plurality of air blowing fans for adjusting the temperature of the air-conditioning air blown out to the environment-forming chamber by each of the plurality of air blowing fans, wherein the control unit further individually controls the respective air-conditioning temperatures of the plurality of second air conditioning units.

An environment forming apparatus according to another aspect of the present invention includes: an environment forming chamber for accommodating an object; an air conditioning chamber communicating with the environment forming chamber; an air conditioning unit that generates air-conditioning air by adjusting a temperature of air flowing into the air-conditioning chamber from a first wall surface side of the environment-forming chamber; a plurality of blower fans arranged on a second wall surface side of the environment-forming chamber facing the first wall surface, and configured to send out air-conditioning air from the air-conditioning chamber to the environment-forming chamber in a direction from the second wall surface to the first wall surface; and a control unit that forms a non-uniform temperature distribution in the environment forming chamber in synchronization with a change in an environment forming process of forming a predetermined environment in the environment forming chamber by individually controlling rotation speeds of the plurality of fans, the environment forming process having a temperature changing process of changing a temperature in the environment forming chamber and a temperature maintaining process of maintaining a temperature in the environment forming chamber, the control unit relatively increasing rotation speeds of air-conditioning air-sending fans out of the plurality of air-sending fans toward a central portion of an internal space of the environment forming chamber and relatively decreasing rotation speeds of air-conditioning air-sending fans out toward a peripheral portion of the internal space of the environment forming chamber in the temperature changing process; in the temperature maintaining step, the rotation speed of the air-conditioning air-sending fan that sends out the air-conditioning air toward the central part of the internal space of the environment-forming chamber is relatively reduced, and the rotation speed of the air-conditioning air-sending fan that sends out the air-conditioning air toward the peripheral part of the internal space of the environment-forming chamber is relatively increased.

According to the present invention, the temperature distribution of the internal space of the environment forming chamber in which the object is housed can be finely controlled.

Drawings

Fig. 1 is a diagram schematically showing a configuration of an environment forming apparatus according to an embodiment of the present invention.

Fig. 2 is a diagram schematically showing an arrangement layout of a plurality of blower fans.

Fig. 3 is a diagram schematically showing an arrangement layout of a plurality of sub-heaters.

Fig. 4 is a diagram schematically showing a layout of the arrangement of the plurality of dc motors.

Fig. 5 is a diagram schematically showing a layout of the arrangement of the plurality of temperature sensors.

Fig. 6 is a diagram schematically showing a layout of the arrangement of the plurality of temperature sensors.

Fig. 7 is a diagram showing a control unit included in the environment test apparatus.

Fig. 8 is a flowchart showing a control method of the environmental test apparatus by the control unit.

Fig. 9 is a diagram partially showing an example of the temperature cycle of the environmental test apparatus.

Fig. 10 is a diagram schematically showing a modification of the layout of the arrangement of the plurality of blower fans.

Fig. 11 is a diagram schematically showing a modification of the layout of the arrangement of the plurality of blower fans.

Fig. 12 is a diagram schematically showing a configuration of an environment forming apparatus according to a modification.

Fig. 13 is a diagram schematically showing a configuration of an environment forming apparatus according to a modification example.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the drawings. Elements denoted by the same reference numerals in different drawings represent the same or corresponding elements.

< Structure of Environment test device 1 >

Fig. 1 is a diagram schematically showing a configuration of an environment forming apparatus according to an embodiment of the present invention. In the example of the present embodiment, the environment forming apparatus is configured as the environment testing apparatus 1 for evaluating the performance and the like of the test object 6 by applying a predetermined temperature and pressure to the test object 6 as the object. However, the environmental test apparatus 1 may be configured as a constant temperature and humidity tank in which a humidifier is additionally installed to apply predetermined temperature and humidity pressures to the test object 6. The environmental test apparatus 1 may be configured as an aging test apparatus for screening for initial defective products by applying predetermined temperature and voltage to the test object 6. The test object 6 is an electronic component such as a circuit board. In the following description, as shown in fig. 1, the directions are defined by an orthogonal coordinate system having an X axis extending in the horizontal direction, a Y axis extending in the vertical direction, and a Z axis perpendicular to both the X axis and the Y axis. The orthogonal coordinate system shown in fig. 1 shows a W axis extending in a direction opposite to the extending direction of the X axis.

The environmental test apparatus 1 includes a laboratory 3 (environment-forming chamber) surrounded by a heat-insulating casing 2, and an air-conditioning chamber 4. The laboratory 3 has a first wall 7 and a second wall 9 facing each other. The air conditioning chamber 4 has: a first space 41 defined by the first wall surface 7 and the inner surface 2A of the housing 2; a second space 42 defined by the second wall surface 9 and the inner surface 2B of the housing 2; and a connection space portion 43 connecting the first space portion 41 and the second space portion 42. A plurality of ventilation openings 8 are formed in the first wall surface 7, and a plurality of ventilation openings 10 are formed in the second wall surface 9. The laboratory 3 and the air conditioning chamber 4 communicate with each other through these

multiple vents

8, 10. The first wall surface 7 formed with the plurality of ventilation openings 8 may be omitted, and the inner surface 2A of the housing 2 may be the first wall surface of the laboratory 3. Further, the first wall surface 7 or the inner surface 2A may be an inner surface of a door for contacting the laboratory 3 from the outside, and in this case, the inner surface of the door becomes the first wall surface of the laboratory 3.

A shelf 5 is provided in the laboratory 3. The shelf 5 has a lattice-like external shape in which a plurality of rod-like members are arranged in a crossing manner. The test object 6 is placed on the shelf 5. In the example shown in fig. 1, the shelf 5 is provided in a plurality of layers in the laboratory 3, and a plurality of objects 6 to be tested are placed in an array on each shelf 5, so that the plurality of objects 6 to be tested are housed in the central portion of the internal space of the laboratory 3. However, the number of layers of the shelves 5 provided in the laboratory 3 may be 1 or more, and the number of the test objects 6 placed on each shelf 5 may be 1 or more.

A cooler 11 as a cooling device and a main heater 12 as a heating device are disposed in the connection space portion 43 of the air conditioning chamber 4. The cooler 11 and the main heater 12 function as a first air conditioning unit, and cool or heat air flowing from the laboratory 3 into the air conditioning chamber 4 through the ventilation opening 8 of the first wall surface 7, thereby generating air-conditioning air adjusted to a desired temperature. The air conditioning temperatures of the cooler 11 and the main heater 12 are controlled by a control unit 30 described later.

A plurality of temperature sensors 17 and 18 described later are disposed in the laboratory 3.

A plurality of blower fans 13 are disposed on the second wall surface 9 side of the laboratory 3. The blower fan 13 is configured as an axial flow fan having a dc motor 14 and a plurality of blades fixed to a distal end portion of a rotary shaft 15 of the dc motor 14. The dc motor 14 is disposed outside the housing 2. The rotation shaft 15 penetrates the outer wall of the housing 2, and extends in the air conditioning chamber 4 in the W direction toward the laboratory 3. The distal end portion of the rotation shaft 15 is disposed concentrically with the center of the ventilation opening 10 of the second wall surface 9. The blades of the blower fan 13 are arranged in the same plane as the vent 10. If the dc motor 14 is driven to rotate the blower fan 13, the conditioned air is sent from the air conditioning chamber 4 into the laboratory 3 through the ventilation opening 10. Since the blades of the blower fan 13 rotate in the Y-Z plane, the air-conditioning air sent into the laboratory 3 by the blower fan 13 advances substantially in the W direction as indicated by the thick straight arrow in fig. 1, passes through the laboratory 3, and is discharged from the ventilation opening 8 of the first wall surface 7 to the air-conditioning chamber 4.

Fig. 2 is a diagram schematically showing an arrangement layout of the plurality of blower fans 13, and corresponds to a plan view of a position along a line II-II shown in fig. 1 as viewed in the X direction. In the example of the present embodiment, the environment testing device 1 includes a total of 9 blower fans 131 to 139 arranged in a matrix of 3 rows×3 columns, in which 3 blower fans 13 are arranged at a distance from each other in each of the Y direction and the Z direction. The blower fans 131 to 139 are disposed so as to be dispersed throughout the entire region including the central portion and the peripheral portion of the second wall surface 9. The rotational speeds of the blower fans 131 to 139 are individually controlled by a control unit 30 described later.

In the second wall surface 9, a plurality of ventilation openings 10 are formed in the same number and the same layout as the plurality of blower fans 13. In the example of the present embodiment, 9 circular vents 101 to 109 are formed in a matrix of 3 rows×3 columns. The ventilation openings 101 to 109 are formed at positions concentric with the rotation axis 15 of the blower fans 131 to 139 at the centers of the circles.

As shown in fig. 1, sub-heaters 16 are disposed in the second space 42 of the air conditioning chamber 4 in correspondence with the respective blower fans 13. The sub heater 16 is disposed between the blades of the blower fan 13 and the dc motor 14 at a position close to the blades. The sub-heater 16 is disposed in a position and shape that does not interfere with the rotation operation of the rotary shaft 15 of the blower fan 13. The sub-heater 16 functions as a second air conditioning unit, and further heats the air-conditioning air generated by the main heater 12, thereby finely adjusting the temperature of the air-conditioning air sent into the laboratory 3 by each blower fan 13.

Fig. 3 is a diagram schematically showing the layout of the arrangement of the plurality of sub-heaters 16, and corresponds to a plan view of the position along the line III-III shown in fig. 1 as viewed in the X direction. The plurality of sub-heaters 16 are arranged in the same number and the same layout as the plurality of blower fans 13. In the example of the present embodiment, a total of 9 sub-heaters 161 to 169 are arranged in a matrix of 3 rows×3 columns. The air conditioning temperatures of the sub-heaters 161 to 169 are individually controlled by a control unit 30 described later.

Fig. 4 is a diagram schematically showing the layout of the arrangement of the plurality of dc motors 14, and corresponds to a plan view of the position along the line IV-IV shown in fig. 1 when viewed in the X direction. In the example of the present embodiment, a total of 9 dc motors 141 to 149 are arranged in a matrix of 3 rows×3 columns.

As shown in fig. 1, a plurality of temperature sensors 17 as first temperature detection means are disposed near the first wall surface 7 of the laboratory 3. Since the first wall surface 7 is located at the most downstream of the air-sending path of the air-conditioning air sent by the air-sending fan 13, the temperature of the air in the most downstream laboratory 3 is detected by the temperature sensor 17.

Fig. 5 is a diagram schematically showing the layout of the arrangement of the plurality of temperature sensors 17, and corresponds to a plan view of the position along the line V-V shown in fig. 1 when viewed in the W direction. The plurality of temperature sensors 17 are arranged in the same number and the same layout as the plurality of blower fans 13. In the example of the present embodiment, a total of 9 temperature sensors 171 to 179 are arranged in a matrix of 3 rows×3 columns. The detected temperatures detected by the temperature sensors 171 to 179 are input to a control unit 30 described later. The temperature sensors 171 to 179 are arranged at the respective intersections of the lattice-shaped frame 20 where the plurality of rod-shaped members are arranged to intersect. The frame 20 is fixed to the inner wall of the laboratory 3 adjacent to the first wall 7. As shown in fig. 1, the temperature sensors 171 to 179 are arranged on the extension lines of the rotary shafts 15 of the blower fans 131 to 139.

As shown in fig. 1, a plurality of temperature sensors 18 as second temperature detection means are disposed near the second wall surface 9 of the laboratory 3. The temperature sensor 18 is disposed near the blower fan 13. Since the second wall surface 9 is located at the most upstream of the air-sending path of the air-conditioning air sent by the air-sending fan 13, the temperature of the air in the most upstream laboratory 3 is detected by the temperature sensor 18.

Fig. 6 is a diagram schematically showing the layout of the arrangement of the plurality of temperature sensors 18, and corresponds to a plan view of the positions along the line VI-VI shown in fig. 1 as viewed in the X direction. The plurality of temperature sensors 18 are arranged in the same number and the same layout as the plurality of blower fans 13. In the example of the present embodiment, a total of 9 temperature sensors 181 to 189 are arranged in a matrix of 3 rows×3 columns. The detected temperatures detected by the temperature sensors 181 to 189 are input to a control unit 30 described later. The temperature sensors 181 to 189 are arranged at the respective intersections of the lattice-shaped frame 21 where the plurality of rod-shaped members are arranged to intersect. The frame 21 is fixed to the inner wall of the laboratory 3 adjacent to the second wall surface 9. As shown in fig. 1, the temperature sensors 181 to 189 are disposed on the extension lines of the rotary shafts 15 of the blower fans 131 to 139.

Fig. 7 is a diagram showing the control unit 30 included in the environment test device 1. A processor such as a CPU functioning as the control unit 30 is disposed outside the housing 2. Temperature detection signals S11 to S19 are input from the temperature sensors 171 to 179 to the control unit 30, respectively. Further, temperature detection signals S21 to S29 are input from the temperature sensors 181 to 189 to the control unit 30, respectively. The control unit 30 controls the driving of the cooler 11 by the driving signal S3. The control unit 30 controls the driving of the main heater 12 by the driving signal S4. The control unit 30 individually controls the output of the dc motors 141 to 149 by the drive signals S51 to S59, thereby individually controlling the rotational speeds of the blower fans 131 to 139 in a range of 0 or more and a maximum value Vmax or less. The control unit 30 individually drives the sub-heaters 161 to 169 by the drive signals S61 to S69, and thereby individually controls the temperature of the air-conditioning air passing through the main heater 12 by the additional heating of the sub-heaters 161 to 169. Accordingly, the temperature of the air-conditioning air sent to the laboratory 3 by each of the blower fans 131 to 139 is individually adjusted by the sub-heaters 161 to 169.

< action of environmental test device 1 >

Fig. 8 is a flowchart showing a control method of the environmental test apparatus 1 performed by the control unit 30. Here, an operation in the case where a predetermined high temperature (for example, 150 ℃) lower than the allowable upper limit temperature Tmax is set as the target set temperature TP, and a uniform temperature distribution of the target set temperature TP is formed in the laboratory 3 will be described. In the initial state, the driving of the cooler 11, the main heater 12, the sub-heaters 161 to 169, and the blower fans 131 to 139 is stopped.

If an execution start command of the environmental test is input after the object 6 is placed on the shelf 5, first, in step SP101, the control unit 30 drives the dc motors 141 to 149 by the drive signals S51 to S59, and starts driving all the blower fans 131 to 139 at the rotation speed of the initial value V0 (< Vmax).

Next, in step SP102, the control unit 30 inputs temperature detection signals S11 to S19 and S21 to S29 from the temperature sensors 171 to 179 and 181 to 189. Then, the control unit 30 determines the maximum value of the detected temperatures T171 to T179 and T181 to T189 indicated by the temperature detection signals S11 to S19 and S21 to S29, and determines whether or not the maximum value is lower than the target set temperature TP. At this time, the main heater 12 is not driven, and the temperature of the internal space of the laboratory 3 is normal, so that the maximum value is lower than the target set temperature TP.

When the maximum values of the detected temperatures T171 to T179 and T181 to T189 are lower than the target set temperature TP (yes in step SP 102), the flow proceeds to step SP103, and the control section 30 controls the main heater 12 by the drive signal S4, thereby increasing the output of the main heater 12 by a predetermined amount. Accordingly, the main heater 12 starts heating the air. Then, the control unit 30 executes the determination of step SP102 again. Immediately after the start of the driving of the main heater 12, the temperature of the internal space of the laboratory 3 does not rise so much, and therefore the processes of steps SP102 and SP103 are temporarily repeated.

If the temperature of the internal space of the laboratory 3 increases and the maximum value of the detected temperatures T171 to T179 and T181 to T189 reaches the target set temperature TP or higher (step SP102: no), the control unit 30 executes the following processing for each of the blower fans 13N (N is 1 to 9 in the example of the present embodiment). The following typically describes the processing of the blower fan 131, but the same processing is performed for the other blower fans 132 to 139.

First, in step SP104, the control unit 30 determines whether or not the rotational speed V1 of the blower fan 131 currently set is equal to or higher than the maximum value Vmax. At this time, since the rotational speed V1 of the blower fan 131 is set to the initial value V0, the rotational speed V1 is smaller than the maximum value Vmax.

When the rotational speed V1 is smaller than the maximum value Vmax (no in step SP 104), the routine proceeds to step SP105, and the control unit 30 determines whether or not the detected temperature T171 of the temperature sensor 171 is lower than the target set temperature TP based on the temperature detection signal S11 input from the temperature sensor 171 corresponding to the blower fan 131.

When the detected temperature T171 is equal to or higher than the target set temperature TP (step SP105: no), it can be said that the temperature of the air rises to the target set temperature TP at the most downstream of the air blowing path of the air blowing fan 131, and it can be said that the entire region upstream of the air blowing path where the temperature rise ends. At this time, the process proceeds to step SP110, and the control unit 30 determines whether or not an end command for the environment test is input.

When the detected temperature T171 is lower than the target set temperature TP (yes in step SP 105), the temperature of the air does not rise to the target set temperature TP at the most downstream of the air blowing path of the air blowing fan 131, and therefore, it is considered that the air-conditioning air blown out to the laboratory 3 by the air blowing fan 131 does not sufficiently reach the most downstream of the air blowing path. At this time, the process proceeds to step SP106, and the control unit 30 controls the dc motor 141 corresponding to the blower fan 131 by the drive signal S51, thereby increasing the rotational speed V1 of the blower fan 131 by a predetermined amount. Accordingly, the air volume of the conditioned air sent to the laboratory 3 by the blower fan 131 increases. Next, the control unit 30 executes the determination of step SP104 again.

When the detected temperature T171 does not rise to the target set temperature TP or higher even if the rotation speed V1 is increased, the processing of steps SP104 to SP106 is repeatedly executed until the rotation speed V1 reaches the maximum value Vmax. By this feedback control, the rotational speed V1 of the blower fan 131 gradually increases, and as a result, the air volume of the air-conditioning air sent from the blower fan 131 to the laboratory 3 gradually increases.

If the rotational speed V1 becomes equal to or higher than the maximum value Vmax (yes in step SP 104), the rotational speed V1 cannot be increased any more, and therefore, the control unit 30 proceeds to a process of increasing the temperature of the air-conditioning air sent from the blower fan 131. First, in step SP107, the control unit 30 determines whether or not the detected temperature T181 of the temperature sensor 181 is lower than the allowable upper limit temperature Tmax based on the temperature detection signal S21 input from the temperature sensor 181 corresponding to the blower fan 131.

When the detected temperature T181 is equal to or higher than the allowable upper limit temperature Tmax (step SP107: no), the temperature of the air-conditioning air sent to the laboratory 3 by the blower fan 131 cannot be increased any more. At this time, the control section 30 executes step SP110.

When the detected temperature T181 is lower than the allowable upper limit temperature Tmax (yes in step SP 107), the routine proceeds to step SP108, and the control unit 30 determines whether or not the detected temperature T171 of the temperature sensor 171 is lower than the target set temperature TP based on the temperature detection signal S11 input from the temperature sensor 171 corresponding to the blower fan 131. At the time immediately after the transition from step SP104 to step SP107, since the sub-heater 161 has not been driven yet, the possibility that the detected temperature T171 is lower than the target set temperature TP is high.

When the detected temperature T171 is lower than the target set temperature TP (yes in step SP 108), the routine proceeds to step SP109, and the control unit 30 controls the sub-heater 161 corresponding to the blower fan 131 by the drive signal S61, thereby increasing the output of the sub-heater 161 by a predetermined amount. Accordingly, the sub-heater 161 starts to be driven, and the temperature of the air-conditioning air sent to the laboratory 3 by the blower fan 131 increases. Then, the control unit 30 executes the determination of step SP107 again.

When the detected temperature T171 does not rise to the target set temperature TP or higher even if the output of the sub-heater 161 is increased, the processing of steps SP107 to SP109 is repeatedly executed as long as the detected temperature T181 is lower than the allowable upper limit temperature Tmax. By this feedback control, the temperature of the air-conditioning air sent to the laboratory 3 by the blower fan 131 is gradually increased by additional heating by the sub-heater 161.

If the detected temperature T171 reaches the target set temperature TP or higher (step SP108: no), the temperature of the air increases to the target set temperature TP at the most downstream of the air blowing path of the air blowing fan 131, and therefore, it can be considered that the entire region upstream of the air blowing path where the temperature increases ends. At this time, the control unit 30 then executes step SP110.

In step SP110, the control unit 30 determines whether or not an end command of the environment test is input. When the end command of the environment test is not input (no in step SP 110), the control unit 30 repeatedly executes the processing of step SP102 and the following steps. On the other hand, when the end command of the environmental test is input (yes in step SP 110), the control unit 30 stops the operation of the environmental test apparatus 1.

In the above description, the sub-heaters 161 to 169 are provided corresponding to the blower fans 131 to 139, and the sub-heaters 161 to 169 are used to individually add and heat the air-conditioning air heated by the main heater 12 in the heating process. The present invention is not limited to this example, and a configuration may be adopted in which sub-coolers are provided corresponding to the blower fans 131 to 139, and the air-conditioning air cooled by the main cooler (cooler 11) is additionally cooled by the sub-coolers alone in the cooling process. The main heater 12, the cooler 11, the sub-heaters 161 to 169, and the sub-coolers may be started to be driven before the blower fans 131 to 139 are driven.

< Effect of environmental test device 1 >

According to the environmental test apparatus 1 of the present embodiment, the plurality of blower fans 131 to 139 are arranged in a plurality of directions (in the example described above, the Y direction and the Z direction) on the second wall surface 9 side of the laboratory 3, and the control unit 30 individually controls the rotational speeds V1 to V9 of the plurality of blower fans 131 to 139. Accordingly, by individually controlling the rotational speeds V1 to V9 of the plurality of blower fans 131 to 139 arranged in a plurality of directions, the flow of the conditioned air in each area in the laboratory 3 can be arbitrarily controlled. As a result, the temperature distribution in the internal space of the laboratory 3 can be finely controlled, including the uniform temperature distribution and the non-uniform temperature distribution.

In addition, according to the environmental test apparatus 1 of the present embodiment, a plurality of temperature sensors 171 to 179 as first temperature detection means are disposed in the laboratory 3 at a plurality of locations on the first wall surface 7 side, which is the most downstream of the flow of the air-conditioning air. Therefore, the control unit 30 can determine whether or not a desired temperature distribution is correctly formed in the laboratory 3 based on the detection results of the temperature sensors 171 to 179. Based on the result of the determination, the control unit 30 individually feedback-controls the blower fans 131 to 139, thereby appropriately forming a desired temperature distribution in the laboratory 3.

In addition, according to the environment testing device 1 of the present embodiment, the plurality of temperature sensors 171 to 179 and the plurality of blower fans 131 to 139 are arranged in the same number and the same layout. In this way, the temperature sensors 171 to 179 and the blower fans 131 to 139 are associated one by one, and therefore, the control unit 30 can easily feedback-control the blower fans 131 to 139 associated with the temperature sensors 171 to 179 based on the detection results of the temperature sensors 171 to 179.

In addition, according to the environment testing device 1 of the present embodiment, the plurality of sub-heaters 161 to 169 as the second air conditioning unit are arranged corresponding to the plurality of blower fans 131 to 139. The control unit 30 controls the air conditioning temperatures of the sub-heaters 161 to 169 individually to adjust the temperature of the air conditioning air sent to the laboratory 3 by the blower fans 131 to 139. Accordingly, the temperature of the air-conditioning air can be controlled not only by controlling the flow of the air-conditioning air but also by controlling the temperature of the air-conditioning air by the respective blower fans 131 to 139, and therefore, the temperature distribution in the internal space of the laboratory 3 can be controlled more finely.

In addition, according to the environment test apparatus 1 of the present embodiment, when the detected temperature T17N of the temperature sensor 17N does not reach the target set temperature TP, the control unit 30 increases the rotation speed VN of the blower fan 13N corresponding to the temperature sensor 17N, and when the detected temperature T17N does not reach the target set temperature TP, drives the sub-heater 16N corresponding to the temperature sensor 17N. Therefore, if the rotation speed VN of the blower fan 13N is increased and the detected temperature T17N reaches the target set temperature TP, the sub-heater 16N does not need to be driven, and therefore, the possibility of overheating accompanying the driving of the sub-heater 16N can be reduced.

In addition, according to the environmental test apparatus 1 of the present embodiment, a plurality of temperature sensors 181 to 189 as second temperature detection means are disposed at a plurality of locations on the side of the second wall surface 9, which is the most upstream of the flow of the air-conditioning air in the laboratory 3. Therefore, when the temperature of the air-conditioning air is overheated by the main heater 12 and the sub-heaters 161 to 169 more than the allowable upper limit temperature Tmax, the control unit 30 determines the overheat occurrence portion based on the detection results of the temperature sensors 181 to 189. Then, based on the result of the determination, the control unit 30 individually feedback-controls the sub-heaters 161 to 169, so that the temperature of the air-conditioning air sent to the laboratory 3 by the respective blower fans 131 to 139 can be suppressed to the allowable upper limit temperature Tmax or lower. As a result, the failure of the test object 6 due to the placement in the overheated air-conditioning air can be avoided in advance.

In addition, according to the environment testing device 1 of the present embodiment, the plurality of temperature sensors 181 to 189 and the plurality of blower fans 131 to 139 are arranged in the same number and the same layout. In this way, the temperature sensors 181 to 189 and the sub-heaters 161 to 169 are associated one by one, and therefore, the control unit 30 can easily feedback-control the sub-heaters 161 to 169 associated with the temperature sensors 181 to 189 based on the detection results of the temperature sensors 181 to 189.

In the environment test apparatus 1 according to the present embodiment, the blower fans 131 to 139 are driven by the dc motors 141 to 149. Therefore, the control unit 30 can control the blower fans 131 to 139 with good responsiveness, and can control the rotational speeds V1 to V9 of the blower fans 131 to 139 in a wide adjustment range from a low speed region to a high speed region, as compared with the case of being driven by an ac motor.

In addition, according to the environmental test apparatus 1 according to the present embodiment, the control unit 30 individually controls the rotational speeds V1 to V9 of the blower fans 131 to 139, thereby forming a uniform temperature distribution in the laboratory 3. Therefore, even when a plurality of objects 6 are stored in a plurality of locations in the laboratory 3, the same temperature and pressure can be applied to each object 6 regardless of the storage locations in the laboratory 3.

< first modification >

In the above embodiment, the control unit 30 forms a uniform temperature distribution of the target set temperature TP in the laboratory 3, but may form an optimum non-uniform temperature distribution in each test process in synchronization with the test process of the environmental test performed on the test object 6.

Fig. 9 is a diagram partially showing an example of the temperature cycle of the environmental test device 1. The normal temperature state starts at time T0, the heating control from the normal temperature state to the high temperature state by the driving of the main heater 12 starts at time T1, and the transition to the high temperature state ends at time T2. The temperature in the laboratory 3 in the high temperature state is 150 ℃. The main heater 12 is driven from time T2 to time T3 to maintain a high temperature state, and this period is a high temperature standing period. The period of high temperature standing is, for example, 30 minutes. Cooling control from the high temperature state to the low temperature state by driving the cooler 11 is started at time T3, and transition to the low temperature state ends at time T4. The temperature in the laboratory 3 in the low temperature state is, for example, -40 ℃. The low temperature state is maintained by driving the cooler 11 from time T4 to time T5, and this period is a low temperature standing period. For example 30 distributions during low temperature placement. Heating control from the low temperature state to the high temperature state by driving the main heater 12 is started at time T5, and transition to the high temperature state ends at time T6.

The series of cycles from time T2 to time T6 is a unit cycle of temperature cycles, and the unit cycle is repeated for a required number of cycles (for example, 1000 cycles). In this way, the unit cycle of the environmental test performed on the test object 6 by the environmental test device 1 includes a temperature change process (process) (time T3 to T4, T5 to T6) for changing the temperature in the test chamber 3 and a temperature maintenance process (time T2 to T3, T4 to T5) for maintaining the temperature in the test chamber 3.

During the temperature change, the control unit 30 controls the driving of the dc motors 141 to 149 by the driving signals S51 to S59, thereby relatively increasing the rotational speed V5 of the blower fan 135 that sends out the air-conditioning air toward the center of the internal space of the laboratory 3 and relatively decreasing the rotational speeds V1 to V4 and V6 to V9 of the blower fans 131 to 134 and 136 to 139 that send out the air-conditioning air toward the peripheral of the internal space of the laboratory 3.

Accordingly, in the temperature change process at the time of temperature increase, a non-uniform temperature distribution is formed in the laboratory 3 in which the temperature at the central portion is relatively high and the temperature at the peripheral portion is relatively low in the cross section (Y-Z plane) of the air-conditioning air flow path of the air-conditioning air sent from the air-sending fan 13, and in the temperature change process at the time of temperature increase, the control unit 30 may additionally heat the air-conditioning air sent toward the central portion of the internal space of the laboratory 3 by driving the sub-heater 165 corresponding to the air-sending fan 135.

In addition, in the course of temperature change when the temperature is lowered, a non-uniform temperature distribution is formed in which the temperature in the central portion is relatively low and the temperature in the peripheral portion is relatively high in the laboratory 3 in the cross section (Y-Z plane) of the air-sending path of the air-conditioning air sent from the air-sending fan 13. In the temperature change process when the temperature is lowered, the control unit 30 may additionally cool the air-conditioning air sent toward the central portion of the internal space of the laboratory 3 by driving the sub-cooler corresponding to the blower fan 135.

As shown in fig. 1, since the test object 6 is stored in the center portion of the internal space of the test room 3, more air-conditioned air can be sent toward the test object 6 by performing the air volume control (central centralized control) of the blower fan 135 that concentrates the driving forces of the blower fans 131 to 139 in the center portion in this manner.

On the other hand, in the temperature maintaining process, the control unit 30 controls the driving of the dc motors 141 to 149 by the driving signals S51 to S59, thereby relatively decreasing the rotational speed V5 of the blower fan 135 that sends out the air-conditioning air toward the central portion of the internal space of the laboratory 3, and relatively increasing the rotational speeds V1 to V4 and V6 to V9 of the blower fans 131 to 134 and 136 to 139 that send out the air-conditioning air toward the peripheral portion of the internal space of the laboratory 3.

Accordingly, in the temperature maintaining process when the temperature is maintained at a high temperature, a non-uniform temperature distribution is formed in the laboratory 3, in which the temperature at the central portion is relatively low and the temperature at the peripheral portion is relatively high, in the cross section (Y-Z plane) of the air-sending path of the air-conditioning air sent from the air-sending fan 13. In the temperature maintenance process in which the temperature is maintained at a high temperature, the control unit 30 may additionally heat the air-conditioning air sent to the peripheral portion of the internal space of the laboratory 3 by driving the sub-heaters 161 to 164 and 166 to 169 corresponding to the blower fans 131 to 134 and 136 to 139.

In addition, in the temperature maintenance process when the temperature is maintained at a low temperature, a non-uniform temperature distribution is formed in which the temperature in the central portion is relatively high and the temperature in the peripheral portion is relatively low in the laboratory 3 in the cross section (Y-Z plane) of the air-sending path of the air-conditioning air sent from the air-sending fan 13. In the temperature maintenance process in which the temperature is maintained at a low temperature, the control unit 30 may additionally cool the conditioned air sent out toward the peripheral portion of the internal space of the laboratory 3 by driving the sub-coolers corresponding to the blower fans 131 to 134 and 136 to 139.

By performing the air volume control (peripheral centralized control) of the blower fans 131 to 134 and 136 to 139 so that the driving forces of the blower fans 131 to 139 are concentrated on the peripheral portions in this way, more conditioned air can be sent toward the wall surface, the ceiling surface, and the floor surface of the laboratory 3.

As described above, the control unit 30 individually controls the rotational speeds of the plurality of blower fans 13, thereby forming a non-uniform temperature distribution in the laboratory 3. In the present modification, the plurality of blower fans 13 are not necessarily arranged in a plurality of directions. The control unit 30 may individually control the rotational speeds of the plurality of blower fans 13 arranged in at least one direction, thereby forming a non-uniform temperature distribution in the laboratory 3.

According to the environmental test apparatus 1 according to the present modification, the control unit 30 relatively increases the rotational speed V5 of the blower fan 135 that sends out the conditioned air toward the center of the internal space of the laboratory 3 during the temperature change. The test object 6 is often contained in the center of the internal space of the laboratory 3. Therefore, by relatively increasing the rotation speed V5 of the blower fan 135 that sends out the air-conditioned air toward the center, more air-conditioned air can be sent out toward the test object 6, and the temperature and pressure can be efficiently applied to the test object 6. In addition, when a plurality of test objects 6 are accommodated in the center portion, temperature transition of the test objects 6 during execution of the temperature change process can be promoted, and temperature deviation can be reduced. In the temperature maintaining process, the control unit 30 relatively increases the rotational speeds V1 to V4 and V6 to V9 of the blower fans 131 to 134 and 136 to 139 that send the air-conditioned air toward the peripheral portion of the internal space of the laboratory 3. Accordingly, more conditioned air can be sent to the peripheral portions, i.e., the wall surface, the ceiling surface, and the floor surface of the laboratory 3. As a result, the influence of the outside air temperature of the laboratory 3 on the temperature of the internal space of the laboratory 3 can be alleviated, and the temperature in the laboratory 3 can be stably maintained.

< second modification >

In the above embodiment, the environment forming apparatus 1 includes a total of 9 blower fans 131 to 139 arranged in a matrix of 3 rows×3 columns, but the arrangement layout of the plurality of blower fans 13 is not limited to this example.

Fig. 10 and 11 are diagrams schematically showing a modification of the layout of the plurality of blower fans 13, and correspond to a plan view of the position along the line II-II shown in fig. 1 when viewed in the X direction.

In the example shown in fig. 10, the environment testing device 1 includes a total of 16 blower fans 13 arranged in a matrix of 4 rows×4 columns, with 4 blower fans 13 arranged at intervals in each of the Y-direction and the Z-direction. The control unit 30 individually controls the rotational speeds of the respective 16 blower fans 13. The environment test apparatus 1 is not limited to the example shown in fig. 10, and may be provided with at least 4 blower fans 13 arranged in a matrix of at least 2 rows×2 columns. The number of the plurality of blower fans 13 belonging to each row and the number of the plurality of blower fans 13 belonging to each column may be different from each other according to the aspect ratio of the second wall surface 9.

In the example shown in fig. 11, the environment testing device 1 includes a large blower fan 13L disposed in the center of the second wall surface 9 and small blower fans 13S disposed in the four corners of the second wall surface 9. That is, the

blower fans

13L and 2 blower fans 13S are arranged in a diagonal line along each of the two diagonal lines of the second wall surface 9. The control unit 30 individually controls the rotational speeds of the

blower fans

13L and 13S. As described above, the plurality of blower fans 13 are not necessarily arranged in a matrix, and the plurality of blower fans 13 are not necessarily identical in size.

According to the present modification, the same effects as those of the above-described embodiment can be obtained by individually controlling the rotational speeds of the plurality of blower fans 13 by the control unit 30.

In the above description, the example in which the environment forming apparatus is configured as the environment testing apparatus 1 has been described, but the present invention is not limited to this example. The environment forming apparatus may be configured as a heat treatment apparatus for forming a predetermined high-temperature environment so as to perform heat treatment on a workpiece as an object. The environment forming apparatus may be configured as a cooking apparatus that forms a predetermined high-temperature environment so as to heat a food serving as a target.

Fig. 12 and 13 are diagrams schematically showing the configuration of an environment forming apparatus according to another modification. As shown in fig. 12, the blades of the blower fan 13 may be arranged in the X direction (the second space 42 side) with respect to the vent 10. As shown in fig. 13, the blades of the blower fan 13 may be arranged in the W direction (on the laboratory 3 side) with respect to the vent 10.

An environment forming apparatus according to an aspect of the present invention includes: an environment forming chamber for accommodating an object; an air conditioning chamber communicating with the environment forming chamber; a first air conditioning unit that generates air-conditioning air by adjusting a temperature of air flowing into the air-conditioning chamber from a first wall surface side of the environment-forming chamber; a plurality of blower fans arranged in a plurality of directions on a second wall surface side of the environment-forming chamber opposite to the first wall surface, and configured to send out air-conditioning air from the air-conditioning chamber to the environment-forming chamber in a direction from the second wall surface to the first wall surface; and a control unit that individually controls the rotational speeds of the respective blower fans.

According to the environment forming apparatus of this aspect, the plurality of blower fans are arranged in the plurality of directions on the second wall surface side of the environment forming chamber, and the control unit individually controls the rotational speeds of the plurality of blower fans. In this way, by individually controlling the rotational speeds of the plurality of blower fans arranged in a plurality of directions, the flow of the air-conditioning air in each area of the environment-formed room can be arbitrarily controlled. As a result, the temperature distribution in the internal space of the environment-forming chamber can be finely controlled, including the uniform temperature distribution and the non-uniform temperature distribution.

For example, by forming a uniform temperature distribution in the environment-forming chamber, even when a plurality of objects are dispersed and stored in a plurality of locations in the environment-forming chamber, the same temperature and pressure can be applied to each object regardless of the storage locations in the environment-forming chamber.

Further, when a specific non-uniform temperature distribution is performed as the most suitable environment forming process, the non-uniform temperature distribution is formed in the environment forming chamber, and thus the environment forming process can be performed with the most suitable temperature distribution.

The environment forming apparatus according to the above aspect preferably further includes: and a plurality of first temperature detection units disposed at a plurality of locations on the first wall surface side.

According to the environment forming apparatus of this aspect, the plurality of first temperature detecting means are disposed at a plurality of locations on the first wall surface side, which are the most downstream of the flow of the environment forming indoor air-conditioning air. Therefore, the control unit can determine whether or not a desired temperature distribution is correctly formed in the environment-forming chamber based on the detection results of the plurality of first temperature detection units. The control unit individually feedback-controls each of the plurality of blower fans based on the determination result, and thereby can appropriately form a desired temperature distribution in the environment-forming chamber.

In the environment forming apparatus according to the above aspect, it is preferable that: the plurality of first temperature detection units and the plurality of blower fans are arranged in the same number and the same layout.

According to the environment forming apparatus of this aspect, the plurality of first temperature detecting units and the plurality of blower fans are arranged in the same number and in the same layout. Therefore, since the first temperature detecting means and the blower fans are in one-to-one correspondence, the control means easily feedback-controls the blower fans corresponding to the respective first temperature detecting means based on the detection result of the first temperature detecting means.

The environment forming apparatus according to the above aspect preferably further includes: and a plurality of second air conditioning units disposed in correspondence with the plurality of air blowing fans for adjusting the temperature of the air-conditioning air blown out to the environment-forming chamber by each of the plurality of air blowing fans, wherein the control unit further individually controls the respective air-conditioning temperatures of the plurality of second air conditioning units.

According to the environment forming apparatus of this aspect, the plurality of second air conditioning units are arranged corresponding to the plurality of air blowing fans, and the control unit individually controls the respective air conditioning temperatures of the plurality of second air conditioning units, so that the temperature of the air conditioning air to be blown into the environment forming chamber is adjusted by the respective air blowing fans of the plurality of air blowing fans. Therefore, the air-conditioning air flow and the temperature thereof can be controlled not only by each of the plurality of air-sending fans, and therefore, the temperature distribution of the internal space of the environment-formed chamber can be controlled more finely.

In the environment forming apparatus according to the above aspect, it is preferable that: the control unit increases a rotation speed of a specific one of the plurality of blower fans corresponding to the specific first temperature detection unit when a detected temperature of the specific first temperature detection unit does not reach a target set temperature, and drives a specific second one of the plurality of second air conditioning units corresponding to the specific first temperature detection unit even when the detected temperature of the specific first temperature detection unit does not reach the target set temperature.

According to the environment forming apparatus of this aspect, the control unit increases the rotation speed of the specific blower fan corresponding to the specific first temperature detecting unit when the detected temperature of the specific first temperature detecting unit does not reach the target set temperature, and drives the specific second air conditioning unit corresponding to the specific first temperature detecting unit even when the detected temperature of the specific first temperature detecting unit does not reach the target set temperature. Therefore, if the rotation speed of the specific blower fan is increased, the specific first temperature detection means does not need to drive the specific second air conditioning unit when the detected temperature reaches the target set temperature, and therefore, the possibility of overheat or supercooling occurring with driving the specific second air conditioning unit can be reduced.

The environment forming apparatus according to the above aspect preferably further includes: and a plurality of second temperature detection units disposed at a plurality of locations on the second wall surface side.

According to the environment forming apparatus of this aspect, the plurality of second temperature detecting means are disposed at the plurality of positions on the second wall surface side, which are the most upstream of the flow of the air-conditioning air in the environment forming chamber. Therefore, when the temperature of the air-conditioned air exceeds the allowable upper limit value or exceeds the allowable lower limit value by the first air-conditioning unit and the second air-conditioning unit, the control unit can determine the occurrence position of overheat or supercooling based on the detection results of the plurality of second temperature detection units. The control unit individually feedback-controls each of the plurality of second air conditioning units based on the determination result, and can thereby suppress the temperature of the air-conditioning air sent to the environment-forming chamber by the plurality of blower fans to be equal to or lower than the allowable upper limit value or equal to or higher than the allowable lower limit value. As a result, it is possible to avoid, in advance, a failure or the like of the object due to the air-conditioning air being overheated or supercooled.

In the environment forming apparatus according to the above aspect, it is preferable that: the plurality of second temperature detection units and the plurality of blower fans are arranged in the same number and the same layout.

According to the environment forming apparatus of this aspect, the plurality of second temperature detecting units and the plurality of blower fans are arranged in the same number and in the same layout. Accordingly, the second temperature detecting units and the second air conditioning units correspond one-to-one, and therefore, the control unit easily feedback-controls the second air conditioning units corresponding to the respective second temperature detecting units based on the detection results of the second temperature detecting units.

In the environment forming apparatus according to the above aspect, it is preferable that: each fan of the plurality of blower fans is driven by a direct current motor.

According to the environment forming apparatus of this aspect, each of the plurality of blower fans is driven by the dc motor. Therefore, the control unit can control the blower fan with good responsiveness, and can control the rotational speed of the blower fan in a wide adjustment range from a low speed region to a high speed region, as compared with the case of being driven by the ac motor.

An environment forming apparatus according to another aspect of the present invention includes: an environment forming chamber for accommodating an object; an air conditioning chamber communicating with the environment forming chamber; an air conditioning unit that generates air-conditioning air by adjusting a temperature of air flowing into the air-conditioning chamber from a first wall surface side of the environment-forming chamber; a plurality of blower fans arranged on a second wall surface side of the environment-forming chamber facing the first wall surface, and configured to send out air-conditioning air from the air-conditioning chamber to the environment-forming chamber in a direction from the second wall surface to the first wall surface; and a control unit that forms a non-uniform temperature distribution in the environment forming chamber in synchronization with a change in an environment forming process that forms a prescribed environment in the environment forming chamber by individually controlling respective rotational speeds of the plurality of fans.

According to the environment forming apparatus of this aspect, the plurality of blower fans are disposed on the second wall surface side of the environment forming chamber, and the control unit individually controls the rotation speeds of the plurality of blower fans, so that the non-uniform temperature distribution is formed in the environment forming chamber in synchronization with the change in the environment forming process. Therefore, when a specific non-uniform temperature distribution is performed as the most suitable environment forming process, the control unit individually controls the respective rotational speeds of the plurality of blower fans to form the non-uniform temperature distribution in the environment forming chamber, so that the environment forming process thereof can be performed with the most suitable temperature distribution.

In the environment forming apparatus according to the above aspect, it is preferable that: the control means relatively increases the rotational speed of the air-conditioning air-sending fan that sends out air-conditioning air toward the central portion of the internal space of the environment-forming chamber and relatively decreases the rotational speed of the air-conditioning air-sending fan that sends out air-conditioning air toward the peripheral portion of the internal space of the environment-forming chamber in the temperature change process; in the temperature maintaining step, the rotation speed of the air-conditioning air-sending fan that sends out the air-conditioning air toward the central part of the internal space of the environment-forming chamber is relatively reduced, and the rotation speed of the air-conditioning air-sending fan that sends out the air-conditioning air toward the peripheral part of the internal space of the environment-forming chamber is relatively increased.

According to the environment forming apparatus of this aspect, the control unit relatively increases the rotational speed of the blower fan that sends out the air-conditioning air toward the center of the internal space of the environment forming chamber among the plurality of blower fans during the temperature change. The object is often stored in the center of the internal space of the environment-forming chamber. Accordingly, by relatively increasing the rotation speed of the blower fan that sends out the air-conditioning air toward the center portion, more air-conditioning air can be sent out toward the object, and therefore, the temperature pressure can be efficiently applied to the object. As a result, when a plurality of objects are accommodated in the center portion, temperature transition of the objects during execution of the temperature change process can be promoted, and temperature deviation can be reduced. In addition, the control unit relatively increases the rotation speed of the blower fan that sends out the air-conditioning air toward the peripheral portion of the internal space of the environment-formed chamber among the plurality of blower fans in the temperature maintaining process. Accordingly, more air-conditioning air can be sent toward the wall surface, the ceiling surface, and the floor surface of the environment-forming chamber as the peripheral portion. As a result, the influence of the outside air temperature of the environment-forming chamber on the temperature of the internal space of the environment-forming chamber can be alleviated, and therefore the temperature in the environment-forming chamber can be stably maintained.

Claims

1. An environment-forming device, comprising:

an environment forming chamber for accommodating an object;

an air conditioning chamber communicating with the environment forming chamber;

a first air conditioning unit that generates air-conditioning air by adjusting a temperature of air flowing into the air-conditioning chamber from a first wall surface side of the environment-forming chamber;

a plurality of blower fans arranged in a plurality of directions on a second wall surface side of the environment-forming chamber opposite to the first wall surface, and configured to send out air-conditioning air from the air-conditioning chamber to the environment-forming chamber in a direction from the second wall surface to the first wall surface;

a control unit that individually controls the rotational speeds of the respective air blowing fans;

a plurality of first temperature detection means arranged at a plurality of locations on the first wall surface side; and

a plurality of second air conditioning units disposed in correspondence with the plurality of air blowing fans for adjusting the temperature of the air-conditioning air blown out to the environment-forming chamber by each of the plurality of air blowing fans,

the control unit also individually controls the respective air conditioning temperatures of the plurality of second air conditioning units.

2. The environment-forming device according to claim 1, wherein,

The plurality of first temperature detection units and the plurality of blower fans are arranged in the same number and the same layout.

3. The environment-forming device according to claim 1, wherein,

the control unit increases the rotation speed of a specific one of the plurality of blower fans corresponding to the specific first temperature detection unit when the detected temperature of the specific first temperature detection unit does not reach the target set temperature, and drives a specific second one of the plurality of second air conditioning units corresponding to the specific first temperature detection unit even when the detected temperature of the specific first temperature detection unit does not reach the target set temperature.

4. The environment-forming device according to claim 1, characterized by further comprising:

and a plurality of second temperature detection units disposed at a plurality of locations on the second wall surface side.

5. The environment-forming device according to claim 4, wherein,

the plurality of second temperature detection units and the plurality of blower fans are arranged in the same number and the same layout.

6. The environment-forming device according to any one of claims 1 to 5, wherein,

each fan of the plurality of blower fans is driven by a direct current motor.

7. An environment-forming device, comprising:

an environment forming chamber for accommodating an object;

an air conditioning chamber communicating with the environment forming chamber;

an air conditioning unit that generates air-conditioning air by adjusting a temperature of air flowing into the air-conditioning chamber from a first wall surface side of the environment-forming chamber;

a plurality of blower fans arranged on a second wall surface side of the environment-forming chamber facing the first wall surface, and configured to send out air-conditioning air from the air-conditioning chamber to the environment-forming chamber in a direction from the second wall surface to the first wall surface; the method comprises the steps of,

a control unit, wherein,

the control unit individually controls the respective rotational speeds of the plurality of fans to thereby form a non-uniform temperature distribution in the environment forming chamber in synchronization with a change in an environment forming process of forming a prescribed environment in the environment forming chamber,

the environment forming process has a temperature change process of changing a temperature in the environment forming chamber and a temperature maintaining process of maintaining the temperature in the environment forming chamber,

The control unit is configured to control the control unit,

in the temperature change process, the rotation speed of the air supply fan which sends out air-conditioning air towards the central part of the internal space of the environment forming chamber is relatively increased, and the rotation speed of the air supply fan which sends out air-conditioning air towards the peripheral part of the internal space of the environment forming chamber is relatively reduced;

in the temperature maintaining step, the rotation speed of the air-conditioning air-sending fan that sends out the air-conditioning air toward the central part of the internal space of the environment-forming chamber is relatively reduced, and the rotation speed of the air-conditioning air-sending fan that sends out the air-conditioning air toward the peripheral part of the internal space of the environment-forming chamber is relatively increased.