JP3863784B2 - Temperature chamber - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a thermostatic chamber in which air in a box in a heat insulation box is circulated by a circulation fan, and a drive motor of the circulation fan is placed on the upper side of the heat insulation box, and in particular, an electrical component such as a hard disk or the like It relates to a thermostatic chamber for testing precision parts at a set temperature.
[0002]
[Prior art]
A conventional thermostat will be briefly described with reference to FIG. FIG. 5 is a sectional view of a conventional thermostatic chamber. The air in the chamber 01 is circulated by the circulation fan 02. The drive motor 03 for driving the circulation fan 02 is disposed on the upper side of the heat insulation box body 04, and the mounting flange 03a of the drive motor 03 is fixed to the heat insulation box body 04 with bolts 06. Further, a cooler 07 and a heater 08 are installed in the air circulation path in the cabinet 01, and the circulating air can be cooled and heated. A unit storage chamber 09 is disposed below the chamber 01, and a compressor 011 and a condenser 012 that constitute a refrigeration cycle together with the cooler 07 are stored in the unit storage chamber 09. The compressor 011 and the condenser 012 are attached to a unit base 013, and the unit base 013 is fixed to a structural member 014 constituting the unit storage chamber 09 with a bolt or the like. On the unit base 013, a condenser fan 016 for cooling the condenser 012 and the like are attached.
[0003]
When testing a test part such as an electric part such as a hard disk or a precision part, the test part is mounted on a part tester (not shown) and stored on a shelf 017 in the cabinet 01. And the temperature in the chamber | room 01 is adjusted with the cooler 07 or the heater 08 so that the detection temperature of the temperature detector 018 may become predetermined | prescribed temperature. The test is performed while the test part is in operation.
[0004]
[Problems to be solved by the invention]
By the way, vibrations generated by the circulation fan 02, the drive motor 03, and the like may be transmitted to the test component in the operating state via the heat insulating box 04, the shelf 017, the component test device, and the like. Further, vibrations generated by the motor of the compressor 011 and the condenser fan 016 cause the unit base 013, the structural member 014 of the unit storage chamber 09, the heat insulating box 04 forming the interior 01, the shelf 017, the component test device, and the like. May be transmitted to the test part in the operating state. The vibration transmitted to the test part may adversely affect the test part during operation, and may be erroneously determined to be a defective product despite being a normal product.
[0005]
The present invention is intended to solve the above-described problems, and an object of the present invention is to provide a thermostatic chamber that can reduce vibrations transmitted to a test part or the like as much as possible.
[0006]
[Means for Solving the Problems]
The constant temperature chamber of the present invention circulates the air in the chamber (3) in the heat insulation box (1) by the circulation fan (4), and the drive motor (51) of the circulation fan is mounted on the upper side of the heat insulation box. Is placed. The drive motor is mounted on a motor mounting plate (52), and a first cushion material (56) is disposed between the motor mounting plate and the heat insulating box, and the motor mounting plate is for bolts. A through hole (52b) is formed, and a mounting plate bolt (61) is inserted into the bolt through hole from above via a pressing plate (59) and a second cushion material (58). The tip of the bolt penetrates the first cushion material and is screwed into the heat insulating box.
[0007]
[0008]
A through hole (51b) is formed in the mounting flange (51a) of the drive motor, and a motor bolt (53) is inserted into the through hole and screwed into the motor mounting plate, so that the mounting flange is mounted on the motor. The front end of the motor bolt is protruded from the lower surface of the motor mounting plate to the first cushion material.
[0009]
Further , the difference between the diameter of the bolt through hole of the motor mounting plate and the diameter of the screw portion of the mounting plate bolt is the difference between the diameter of the through hole of the mounting flange of the drive motor and the diameter of the screw portion of the motor bolt. it may be greater than the difference.
[0010]
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of a thermostatic chamber according to the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view of a thermostat according to an embodiment. FIG. 2 is an enlarged view of a main part of FIG. FIG. 3 is a refrigerant circuit diagram of a thermostatic chamber. Drawing 4 is an explanatory view at the time of conveyance of the thermostat of one embodiment, (a) is an important section sectional view and (b) is an important section expanded sectional view.
[0012]
The upper part of the thermostat is comprised of a heat insulating box 1 whose front is open. The front opening of the heat insulating box 1 is closed by a heat insulating door 2 so as to be opened and closed. An air circulation path is formed in the internal space of the heat insulating box 1, that is, the interior 3, and the air in the interior 3 is circulated by a circulation fan 4 disposed in the air circulation path. A shelf 5 is provided in the cabinet 3. A cooler 6 and a heater 7 are arranged in the air circulation path to cool or heat the circulating air. A temperature detector 8 detects the temperature of the interior 3. A control device (not shown) controls the cooler 6 and the heater 7 so that the detection value of the temperature detector 8 becomes a set value, and the internal temperature is a desired value (for example, 0 ° C. to 60 ° C. Temperature).
[0013]
On the other hand, a unit storage chamber 16 is formed in the lower part of the thermostatic chamber, that is, below the heat insulating box 1. The unit storage chamber 16 is assembled with an angle member 17 that is a structural member, and the angle member 17 supports the heat insulating box 1. A plurality of main support legs 18 that support the unit storage chamber 16 are provided below the unit storage chamber 16. The lower cross girder 21 of the unit storage chamber 16 is formed of a grooved material, and is formed with a through hole 22 for bolts and a through hole 23 for support legs that penetrate vertically.
[0014]
A unit base 26 is disposed in the unit storage chamber 16, and a condenser 31, a compressor 32, a condenser fan 33, and the like are placed and fixed on the unit base 26. The condenser 31 and the compressor 32 constitute a refrigeration cycle together with the cooler 6. A nut 34 is fixed to the unit base 26 and a unit support leg 36 is attached. The unit support legs 36 are arranged in a state of being inserted through the support leg through holes 23 of the lower cross beam 21. Then, when the thermostatic chamber is transported to an installation place or the like, as shown in FIG. 4A, the unit base 26 is placed on the lower cross beam 21, and from the lower side of the lower cross beam 21, A bolt 37 is inserted into the cylindrical collar 38 and the bolt through hole 22 of the lower cross beam 21 and screwed into the nut 34 of the unit base 26. The unit base 26 is fixed on the lower cross beam 21 by the bolts 37. In this state, the lower end of the unit support leg 36 protrudes below the lower end of the main support leg 18.
[0015]
When the thermostatic chamber is installed on the installation surface 41, the bolt 37 and the collar 38 are removed, and the unit base 26 is raised by the unit support legs 36 as shown in FIG. A space (for example, about 5 mm) is formed between the unit storage chamber 16 and the lower cross beam 21 of the unit storage chamber 16, and the unit base 26 is in contact with the angle member 17 and the lower cross beam 21 which are structural members of the unit storage chamber 16. Disappear.
[0016]
Next, the refrigeration cycle of the thermostatic chamber will be briefly described. As shown in FIG. 3, the refrigeration cycle is configured by sequentially connecting a compressor 32, a condenser 31, a capillary tube 43 that is a decompression device, a cooler 6, and the like through a refrigerant pipe 44. During the cooling operation, the compressor 32 and the condenser fan 33 that air-cools the condenser 31 are operating, and the compressor 32 pressurizes the gaseous refrigerant and discharges it to the condenser 31. The refrigerant is air-cooled and liquefied by the condenser 31, and then flows into the capillary tube 43 to be depressurized before being supplied to the cooler 6. In this cooler 6, the refrigerant takes away ambient heat and returns to the compressor 32 again. In this way, the cooler 6 can cool the surrounding air.
[0017]
Further, a drive motor 51 for driving the circulation fan 4 is disposed above the heat insulating box 1. And the structure which attaches this drive motor 51 to the heat insulation box 1 is demonstrated based on FIG. A metal motor mounting plate 52 is disposed below the drive motor 51, and a bolt hole 52a is formed through the motor mounting plate 52. In addition, a through hole 51 b is formed in the mounting flange 51 a of the drive motor 51. Then, the motor bolt 53 is inserted from above the through hole 51 b of the mounting flange 51 a and screwed into the bolt hole 52 a of the motor mounting plate 52, and the tip of the motor bolt 53 is below the lower surface of the motor mounting plate 52. Make it protrude.
[0018]
A first cushion material 56 made of a rubber plate is disposed between the motor mounting plate 52 and the heat insulating box 1. Therefore, the tip of the motor bolt 53 projects from the lower surface of the motor mounting plate 52 to the first cushion material 56. The motor mounting plate 52 is formed with a bolt through hole 52b. A second cushion material 58 made of a rubber plate having a through hole 58a is arranged above the bolt through hole 52b, and a holding plate 59 having a through hole 59a is arranged above the second cushion material 58. Has been. The mounting plate bolt 61 is inserted from the upper side of the through hole 59a of the pressing plate 59, the through hole 58a of the second cushion material 58, the bolt through hole 52b of the motor mounting plate 52, and the through hole of the first cushion material 56. Through 56 a, the tip is screwed into the heat insulating box 1, and the holding plate 59, the second cushion material 58, the motor mounting plate 52 and the first cushion material 56 are tightened with the mounting plate bolt 61. Therefore, the motor mounting plate 52 is fixed while being sandwiched between the second cushion material 58 and the first cushion material 56.
[0019]
Further, the diameter of the bolt through hole 52 b of the motor mounting plate 52 is sufficiently larger than the diameter of the screw portion of the mounting plate bolt 61 so that the motor mounting plate 52 does not make metal contact with the mounting plate bolt 61. . That is, a gap is formed between the entire circumference of the inner surface of the bolt through hole 52 b and the mounting plate bolt 61. The difference between the diameter of the bolt through hole 52 b of the motor mounting plate 52 and the diameter of the screw portion of the mounting plate bolt 61 is different from the diameter of the through hole 51 b of the mounting flange 51 a of the drive motor 51 and the screw of the motor bolt 53. It is larger than the difference from the diameter of the part. Further, the diameter of the bolt through hole 52b of the motor mounting plate 52 is determined based on the diameter of the through hole 59a of the holding plate 59, the diameter of the through hole 58a of the second cushion material 58, and the diameter of the through hole 56a of the first cushion material 56. Is also formed large.
[0020]
By the way, as described above, the unit base 26 is displaced up and down during transportation and after installation, so as to allow this displacement, as shown in FIG. 1 and FIG. Both the refrigerant pipe 44 to the cooler 6 and the refrigerant pipe 44 from the cooler 6 to the compressor 32 each have a horizontal portion 44 a extending substantially horizontally in the unit storage chamber 16. The horizontal portion 44a is displaced between the state illustrated in FIG. 1 and the state illustrated in FIG. 4A, thereby preventing an excessive force from being applied to the refrigerant pipe 44 and the like.
[0021]
Then, when testing a test part such as an electric part such as a hard disk or a precision part in a thermostatic chamber, the test part is mounted on a part test apparatus (not shown) and stored on the shelf 5 in the cabinet 3. And the temperature in the store | warehouse | chamber 3 is adjusted with the cooler 6 or the heater 7 so that the detected value of the temperature detector 8 may become predetermined | prescribed temperature. The test is performed in a state where the test part is in operation.
[0022]
The constant temperature chamber of the embodiment configured as described above is such that the mounting flange 51a of the drive motor 51 arranged on the upper side of the heat insulating box 1 is on the upper surface of the motor mounting plate 52 larger than the lower surface of the drive motor 51. The motor mounting plate 52 is attached to the heat insulating box 1 in a state where the motor mounting plate 52 is sandwiched between the second cushion material 58 and the first cushion material 56. Therefore, the vibration of the drive motor 51 and the vibration of the circulation fan 4 are first attenuated when transmitted from the mounting flange 51a to the motor mounting plate 52, and then the motor transmitted to the motor mounting plate 52 has a large vibration. The vibration from the motor mounting plate 52 is further attenuated by the second cushion material 58 and the first cushion material 56. As a result, it is possible to prevent the vibration of the drive motor 51 and the circulation fan 4 from being transmitted to the heat insulating box 1 as much as possible. Moreover, the bolt through hole 52b of the motor mounting plate 52 has a large diameter and is not in contact with the mounting plate bolt 61, and the vibration of the drive motor 51 and the vibration of the circulation fan 4 are not fixed to the mounting plate bolt. Transmission to the heat insulation box 1 through 61 is prevented. As a result, the vibration of the drive motor 51 and the vibration of the circulation fan 4 are reduced from being transmitted to the test parts in the cabinet 3, and it is erroneously determined that the test parts are defective even though they are normal. Can be prevented as much as possible.
[0023]
And the front-end | tip of the motor volt | bolt 53 protrudes from the lower surface of the motor mounting plate 52 to the 1st cushion material 56, and positioning when mounting the motor mounting plate 52 on the 1st cushion material 56 can be performed easily. In addition, the relative position between the motor mounting plate 52 and the first cushion material 56 can be prevented from being greatly displaced.
[0024]
Further, in the thermostatic chamber of the embodiment, in the installed state, the unit base 26 is not in contact with the angle member 17 and the lower cross beam 21 which are structural members of the unit storage chamber 16, and for the condenser on the unit base 26. Vibrations of the motor of the fan 33 and the compressor 32 are not transmitted to the angle member 17 and the lower cross beam 21 via the unit base 26. Therefore, the vibration of the motor of the condenser fan 33, the compressor 32, and the like is reduced from being transmitted to the test components in the cabinet 3. As a result, it can be prevented as much as possible that the product is erroneously determined to be defective even though it is normal.
[0025]
Further, during transportation, the unit base 26 is fixed to the lower cross beam 21 of the unit storage chamber 16, and it is possible to prevent the unit base 26 from being inadvertently moved and being damaged or broken down.
[0026]
Further, the unit support legs 36 of the unit base 26 are disposed so as to be inserted into the support leg through holes 23 of the lower cross beam 21, and the unit base 26 is greatly increased in the unit storage chamber 16 in the event of an earthquake or the like. It is possible to prevent displacement from front to back and from side to side.
[0027]
Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims. Can be done. Examples of modifications of the present invention are illustrated below.
(1) In the embodiment, the first cushion material 56 and the second cushion material 58 are made of rubber plates, but the material can be appropriately changed. However, a rubber plate is preferable. Further, the material of the motor mounting plate 52 can be selected as appropriate. However, a metal is preferable in terms of strength.
[0028]
(2) The number and arrangement of the horizontal portions 44a can be changed as appropriate. However, at least one of the refrigerant pipe 44 from the condenser 31 to the cooler 6 and the refrigerant pipe 44 from the cooler 6 to the compressor 32 includes a plurality of horizontal portions 44 a extending substantially horizontally in the unit storage chamber 16. It is preferable to have. Further, the horizontal portion 44a only needs to extend substantially horizontally so as to allow the vertical displacement of the unit base 26.
[0029]
(3) In the embodiment, the pressure reducing device is a capillary tube, but the pressure reducing device may be an expansion valve.
(4) The thermostatic chamber can be used for purposes other than testing of electrical parts such as hard disks and precision parts.
[0030]
(5) The structural member of the unit storage chamber 16 that supports the unit base 26 at the time of transportation is not necessarily the lower cross beam 21 but may be another member.
(6) The unit support legs 36 are inserted through the support leg through holes 23, but need not be inserted.
(7) In the embodiment, both the cooler 6 and the heater 7 are provided, but it is not always necessary to provide them. However, at least one is preferably provided.
[0031]
【The invention's effect】
According to the present invention, the drive motor for the circulation fan is attached to the motor mounting plate, the first cushion material is disposed between the motor mounting plate and the heat insulating box, and the motor mounting plate is It is fixed in a state of being sandwiched between the 1 cushion material and the second cushion material. Therefore, the vibration of the circulation fan and the drive motor is attenuated when transmitted from the drive motor to the motor mounting plate, and then is attenuated when the vibration transmitted to the motor mounting plate spreads to the motor mounting plate. Vibration from the motor mounting plate is attenuated by the second cushion material and the first cushion material. Therefore, it is possible to prevent the vibration of the circulation fan, the drive motor, and the like from being transmitted to the test component as much as possible through the heat insulation box. As a result, although the test part is a normal product, it is less likely that it is erroneously determined to be a defective product.
[ 0032 ]
And since the front-end | tip of the motor volt | bolt which fixes the mounting flange of the said drive motor to a motor mounting plate protrudes from the lower surface of a motor mounting plate to a 1st cushion material, a motor mounting plate is mounted on a 1st cushion material. Positioning can be easily performed.
[0033]
Further, the difference between the diameter of the bolt through hole of the motor mounting plate and the diameter of the screw portion of the mounting plate bolt is the difference between the diameter of the through hole of the mounting flange of the drive motor and the diameter of the screw portion of the motor bolt. Therefore, the contact between the motor mounting plate and the mounting plate bolt is reduced, and the transmission of vibration from the motor mounting plate to the heat insulating box is further reduced .
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a thermostatic chamber according to an embodiment.
FIG. 2 is an enlarged view of a main part of FIG.
FIG. 3 is a refrigerant circuit diagram of a thermostatic chamber.
FIGS. 4A and 4B are explanatory diagrams of the constant temperature storage according to the embodiment at the time of transport, in which FIG. 4A is a cross-sectional view of a main part, and FIG.
FIG. 5 is a cross-sectional view of a conventional thermostatic chamber.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Heat insulation box 3 Inside the chamber 4 Circulation fan 6 Cooler 16 Unit storage chamber 17 Angle material (structural member)
18 Main support legs 21 Lower cross beam (structural member)
26 Unit Base 31 Condenser 32 Compressor 36 Unit Support Leg 51 Drive Motor 51a Mounting Flange 51b Through Hole 52 Motor Mounting Plate 52b Bolt Through Hole 53 Motor Bolt 56 First Cushion Material 58 Second Cushion Material 59 Holding Plate 61 Mounting plate bolt

Claims (2)

In the thermostatic chamber in which the air in the box in the heat insulation box is circulated by a circulation fan, and the drive motor of this circulation fan is placed on the upper side of the heat insulation box,
The drive motor is attached to a motor mounting plate;
A first cushion material is disposed between the motor mounting plate and the heat insulating box,
A bolt through hole is formed in the motor mounting plate,
From above in the bolt through hole, is inserted through the mounting plate for bolt pressing plate and the second cushion member, is screwed into the heat-insulating main body distal end of the mounting plate bolt penetrates the first cushion member ,
A through hole is formed in the mounting flange of the drive motor,
The motor bolt is inserted into this through hole and screwed into the motor mounting plate, and the mounting flange is mounted on the motor mounting plate.
The thermostat is characterized in that the tip of the motor bolt protrudes from the lower surface of the motor mounting plate to the first cushion material . In the thermostatic chamber where the air in the box inside the heat insulation box is circulated by a circulation fan, and the drive motor of this circulation fan is placed on the upper side of the heat insulation box,
The drive motor is attached to a motor mounting plate;
A first cushion material is disposed between the motor mounting plate and the heat insulating box,
A bolt through hole is formed in the motor mounting plate,
A mounting plate bolt is inserted into the bolt through-hole from above via a holding plate and a second cushion material, and the tip of the mounting plate bolt penetrates the first cushion material and is screwed into the heat insulation box. ,
A through hole is formed in the mounting flange of the drive motor,
The motor bolt is inserted into this through hole and screwed into the motor mounting plate, and the mounting flange is mounted on the motor mounting plate.
The difference between the diameter of the bolt through hole of the motor mounting plate and the diameter of the screw portion of the mounting plate bolt is based on the difference between the diameter of the through hole of the mounting flange of the drive motor and the diameter of the screw portion of the motor bolt. A thermostatic chamber characterized by its large size .

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