JP2002221340A - Integral air-cooled refrigerator unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low noise type integral air-cooled refrigerator unit capable of suppressing the generation of noise by cutting off leakage of noise, generated from a compressor in a machine room, to the outside. SOLUTION: A decoration panel 2 of which the peripheral wall of the machine room is formed and sound absorbing materials 5 and 13 are attached to inner plate panels 12 and 12a to form a noise reduction wall. Zigzagging punched holes 15 through which a waste heat generated from a compressor 11, etc., are formed in the inner plate panel 12a forming the top plate of the machine room.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an integrated air-cooled refrigeration unit, and more particularly, to forcibly circulate air by an exhaust fan through a condensing coil through which a high-temperature and high-pressure refrigerant gas compressed by a compressor flows. The present invention relates to a low-noise structure of an integrated air-cooled refrigerator unit for heat exchange.

[0002]

2. Description of the Related Art Refrigerators such as refrigerated / refrigerated showcases
It has a compressor, a condenser, a liquid receiver, a solenoid valve, an expansion valve, and a cooler. The high-temperature, high-pressure refrigerant compressed by the compressor is heat-exchanged with the atmosphere by a condenser to form a high-pressure liquid refrigerant. The refrigerant is expanded into a low-temperature, low-pressure refrigerant by expanding the refrigerant from a receiver through an expansion valve through an electromagnetic valve, and the low-temperature, low-pressure refrigerant is supplied to a cooler installed in a showcase to cool the air in the refrigerator, thereby reducing the temperature of the refrigerator. The inside of the case is cooled to a predetermined temperature. The refrigerant that has been cooled by giving cold heat to the internal air by the cooler, is again sucked into the compressor and circulated through the same path. These compressors and condensers are often installed outside the store, especially on the roof, because of problems such as installation space and noise. In order to install them collectively, the compressor is stored. 2. Description of the Related Art An integrated air-cooled refrigerator unit in which a machine room and a heat exchange room having a condenser are integrally formed is widely used. This one-piece air-cooled refrigerator unit compresses a refrigerant sent from a cooler and heated to a high-temperature and high-pressure refrigerant gas by a compressor provided in a machine room, and comprises a combination of a heat transfer tube and fins. The refrigerant gas is sent to the condensing coil, and the air is forced to flow through the exhaust fan, thereby exchanging heat with the refrigerant gas in the condensing coil to liquefy the refrigerant gas. The refrigerant is sent from the liquid receiver to the cooler in the showcase in a low-temperature and low-pressure state via an expansion valve or the like, where it cools the air in the refrigerator and keeps the inside of the showcase cool.

FIG. 5 is a side sectional view showing an example of a conventional integrated air-cooled refrigerator unit. The integrated air-cooled refrigerator unit 100 is provided above a machine room 110 having a device 111 such as a compressor therein,
Condensing coil 121 as a condenser inside, exhaust fan 1
The heat exchange chamber 120 to which 22 and the like are attached is integrally configured by the decorative panel 101. The front and rear walls of the machine room 110 are formed by the decorative panel 101.
Further, both side walls and the upper part are closed by the inner panel 112, and a compressor 111 and the like are provided therein. The inner panel (top panel) 112 at the upper part of the machine room 110 functions as a partition plate, and the upper panel partitioned by the inner panel 112 has
A heat exchange chamber 120 is provided. The heat exchange chamber 120
Opening 10 provided on the front side of the decorative panel 101
2, a condensing coil 121 is installed at an angle, and a predetermined number of exhaust fans 122 are provided above the heat exchange chamber 120.
Is provided.

A control panel 103 is provided on the front side of the decorative panel 101 at a position corresponding to the machine room 110. Further, at the lower part of the compressor 111, piping connection portions on the inflow side and outflow side (not shown) for connecting refrigerant piping are provided, and the decorative panel 101 has an unillustrated position at a position corresponding to the piping connection portion. A hole for piping is formed.

In the integrated air-cooled refrigerator unit 100, a cooler provided in a freezer / refrigerant showcase (not shown) installed in a store gives cold heat to the air in the refrigerator to remove the high-temperature refrigerant gas. After being sucked into a compressor 111 in a machine room 110 from a pipe (not shown) and compressed, it is sent to a condensation coil 121 in the heat exchange chamber 120 by a pipe (not shown). In the heat exchange chamber 120, when the exhaust fan 122 is operated, the air (atmosphere) sucked from the opening 102 passes while touching the heat transfer tubes and the fins of the condensing coil 121 and exchanges heat with the refrigerant gas. A flow discharged above the heat exchange chamber 120 by the operation of the exhaust fan 122 is formed.

In the unitary air-cooled refrigeration unit 100 configured as above, the waste heat of the compressor 111 and the like in the machine room 110 is generated by the inner panel 11 forming the peripheral wall of the machine room 110.
2 or is discharged from a gap or the like generated at the joint end of the decorative panel 101, so that heat hardly stays in the machine room 110.

[0007]

However, in the conventional integrated air-cooled refrigerator unit, the sound generated from the compressor in the machine room leaks out of the gap for discharging the waste heat.
Resonance with the inner panel of the machine room or the decorative panel of the integrated air-cooled refrigerator unit has caused a problem that loud noise is generated. On the other hand, heat generated from a device such as a compressor in a machine room may cause a malfunction in the control system, and it is necessary to appropriately discharge waste heat from the device to the outside. Therefore, the present invention is to prevent noise generated from equipment in the machine room such as a compressor from leaking to the outside to suppress generation of noise, and to appropriately discharge waste heat from the equipment in the machine room to the outside. It is an object of the present invention to provide a low noise integrated air-cooled refrigerator unit that can be used.

[0008]

In order to achieve the above object, an integrated air-cooled refrigerator unit of the present invention is provided with a machine room for accommodating a compressor and the like, and is located above the machine room, and is located at a position above the compressor room. A condensing coil through which the discharged high-temperature and high-pressure refrigerant gas flows and an exhaust fan for guiding air to the condensing coil, a heat exchange chamber for exchanging heat between the air and the refrigerant gas and condensing the refrigerant gas; In an integrated air-cooled refrigerator unit integrally configured by a decorative panel, the peripheral wall and the top plate of the machine room are configured by soundproof walls to which a sound absorbing material is attached, and the compressor and the like are mounted on the top plate of the machine room. And a waste heat hole for discharging waste heat from the device. Further, the joint end between the front and rear walls of the peripheral wall of the machine room and the left and right side walls is sealed with the sound absorbing material, whereby a gap generated at the joint end is closed, and more secure. To reduce noise. Also,
Out of the peripheral walls of the machine room, the left and right side walls are formed in a double wall structure of an inner panel and a decorative panel, and a sound absorbing material is interposed between these two panels, whereby the decorative panel Resonance can be prevented, and the noise can be further reduced. Furthermore, the exhaust fan is surrounded by a soundproof wall, and an exhaust duct is provided above the exhaust fan, whereby noise generated by the exhaust fan can be suppressed, and the noise of the entire unit can be reduced. Can be achieved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of an integrated air-cooled refrigerator unit of the present invention will be described below with reference to FIGS. 1 is a side sectional view, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a perspective view, and FIG. 4 is a front view. This integrated air-cooled refrigerator unit 1 includes a machine room 10 having a compressor 11 therein.
And a heat exchange chamber 2 provided above the machine room 10 and having a condensing coil 21 and an exhaust fan 22 mounted therein.
0 is integrally formed in a frame formed in a substantially rectangular parallelepiped shape by the plate-shaped decorative panel 2. The machine room 10 has front and rear walls formed by the decorative panel 2, both side walls formed by the inner panel 12, and an upper part formed by the inner panel (top panel).
The compressor 11 and the like which are closed by 12a and formed in the same manner as the conventional one are housed therein. Machine room 1
The inner plate panel (top plate) 12a constituting the upper part of the cylinder 0 functions as a partition plate with the heat exchange chamber 20, which will be described later, and does not collide with the vicinity of the lower part of the condenser coil 21 attached to the heat exchange chamber. In the middle part, an inclined surface that is inclined obliquely downward toward the rear is formed.

On the other hand, the heat exchange chamber 20 has a condensing coil 2 formed in a conventional manner by combining a heat transfer tube and fins.
1 is attached with its lower end 21a inclined rearward, and the lower end 21a is fixed so as to contact the lower end of the inclined surface of the inner panel 12a. An opening 3 for taking in air is provided in the decorative panel 2 on the front side of the condenser coil 21. Although not shown, the opening 3
Is covered with a lattice-shaped wire mesh to prevent inhalation of leaves and paper debris.

An exhaust fan 22 is provided above the condensing coil 21. Both sides and the rear of the condensing coil 21 are provided on both sides and the rear of the integrated air-cooled refrigerator unit. Is blocked by Accordingly, inside the heat exchange chamber 20, the front side is formed by the condensing coil 21, the both sides and the rear side are formed by the decorative panel 2, the upper part is formed by the exhaust fan 22, and the lower part is formed by the inner panel 12a forming the upper part of the machine room. Each enclosed air passage will be formed. A control panel 4 similar to the conventional control panel 4 is provided on the outer surface of the decorative panel 2 on the front side. In addition, at the lower part of the compressor 11, unillustrated inflow side and outflow side pipe connections for connecting refrigerant pipes are provided, and the decorative panel 2 is located at a position corresponding to the pipe connections. A hole for piping is formed. Further, a lifting eyebolt 30 is attached to an upper portion of the heat exchange chamber 20.

In the unitary air-cooled refrigerator unit 1, the refrigerant gas, which has become high temperature and high pressure by the compressor 11 in the machine room 10, is sent to the condensing coil 21 in the heat exchange room 20. In the heat exchange chamber 20, by operating the exhaust fan 22, external air is sucked from the opening 3 provided in the front decorative panel, and the gap formed between the fins of the condensing coil 21 is removed. After passing, it is discharged above the heat exchange chamber 20 by the exhaust fan 22. The air exchanges heat with the refrigerant gas flowing in the electric heating tube when passing through the condensing coil 21 to cool and condense the refrigerant gas and increase the temperature of the air itself.

In such an integrated air-cooled refrigerator unit 1, sound absorbing materials 5 and 13 are attached to the front and rear decorative panels 2 of the machine room 10 and the inner surfaces of the inner panel panels 12 and 12a on both sides and the upper part. To form a soundproof wall and an inner plate panel 12a constituting the upper part of the machine room 10.
A staggered punching hole 15 is formed as a waste heat hole. The staggered punching holes 15 are formed at a position behind the lower end 21a of the condensing coil 21 of the heat exchange chamber 20, and the heat generated from the compressor 11 and the like and the inside of the control panel 4 is staggered. The air is discharged from the punching hole 15 into an air passage formed in the heat exchange chamber 20, and is discharged above the heat exchange chamber 20 by the exhaust fan 22. The sound absorbing material 13 is provided on the inner panel 1.
The decorative panel 2 is formed so as to close a gap generated at a joint end portion between the decorative panel 2 and the decorative panel 2. For example, as shown in the sectional view of FIG. 2, the sound absorbing material 5 attached to the front and rear decorative panels 2 in the machine room is replaced with the sound absorbing material 5 attached to the inner panel 12 on both the left and right sides. 13, a step 5a is formed on both left and right end surfaces of the sound absorbing material 5, and a joint end between the inner panel 12 and the decorative panel 2 is sealed by the step 5a. The gap generated at the joint end can be closed. In addition, in this drawing, illustration of the compressor 11 and the control panel 4 is omitted for convenience of explanation.

As described above, the decorative panels 2 and the inner panel panels 12, 12a constituting the peripheral wall of the machine room are provided with the sound absorbing materials 5, 13 respectively.
To form a soundproof wall, noise generated from inside the machine room 10 can be reduced. Further, since the staggered punching holes 15 are formed so that the waste heat in the machine room 10 passes through the air passage formed in the heat exchange room 20,
Without providing a separate waste heat fan, the heat exchange chamber 20
By using the exhaust fan 22, the heat generated from the devices in the machine room 10 can be forcibly discharged. Also, the joint end of the decorative panel 2 and the inner panel 12, 12a is connected to the sound absorbing material 5
By closing the gap, the gap generated at the joint end can be closed, and sound leakage to the outside can be suppressed more reliably. In order to prevent the noise in the machine room 10 from leaking from the staggered punching holes 15, the staggered punching holes 15 are formed in the machine room 10 at positions away from the compressor 11 and the like. Preferably.

Further, at both sides of the machine room 10, a space is formed between the inner panel 12 and the decorative panel 2 located outside the inner panel 12. As shown in FIG. The sound absorbing material 6 may be adhered to the inner surface side, and the space may be closed with the sound absorbing material 6. Thereby, sound leakage from the inner panel 12 can be prevented, and noise due to resonance of the decorative panel 2 can be suppressed. It should be noted that a sound leak can be further reduced by closing a hole for connecting a refrigerant pipe (not shown) with a seal member after the pipe is constructed.

As the sound-absorbing material of this embodiment, a material formed of rubber or a sponge-like resin material is used. In particular, a material obtained by processing an acrylic pressure-sensitive adhesive on the surface of a flexible polyurethane foam into a film shape or the like is used. The use of a special resin film having a smooth surface can improve the sound absorbing performance.

As described above, the soundproof wall is provided on the peripheral wall of the machine room, and the decorative panel around the machine room is also made of the soundproof wall. It is possible to reduce noise,
Further, the staggered punching holes for waste heat provided on the top plate of the machine room enable more appropriate discharge of waste heat.

Further, in the heat exchange chamber 20, the periphery of the exhaust fan 22 is surrounded by a soundproof wall 23, and an exhaust duct 24 is provided above the exhaust fan 22. In the present embodiment, the sound insulation wall 23 and the exhaust duct 24 are integrally formed by a single metal plate on the front and rear surfaces, and the decorative panel 2 extends upward from the position of the exhaust fan 22 on both sides. Sound barrier 23 and exhaust duct 24
Is formed. As a result, the number of parts and the manufacturing cost are reduced.

In this way, by surrounding the exhaust fan 22 with the soundproof wall 23 and the exhaust duct 24 that can provide a muffler effect, wind noise and the like generated from the fan can be blocked from going outside. Noise including reflected sound from the ground (floor) and walls of surrounding buildings can be reduced. The soundproof wall 23 and the exhaust duct 24 can be combined into a kit, and can be retrofitted to a conventional heat exchange room or the like. Further, by providing the sound absorbing material 25 on the inner surfaces of the soundproof wall 23 and the exhaust duct 24, the noise reduction effect can be further enhanced.
Can also be suppressed.

Also, by covering the upper portion of the air intake opening 3 with the soundproof wall 23, it is possible to prevent sound from leaking outside through the upper portion of the condensing coil 21 and to reduce the air suction noise. Can be. At this time, the dimension covering the opening 3 is １ ／ of the height of the condenser coil 21.
If the opening 3 is covered with a size larger than this, the resistance of the air flow is reduced, the air volume is reduced, and the heat exchange rate may be reduced.

Further, by using a low noise type fan as the exhaust fan 22, the generated noise can be further reduced. In addition, by adopting a grooved tube as the heat transfer tube of the condensing coil 21, the heat transfer area of the condensing coil 21 can be increased, the heat exchange rate can be improved, and the use of a low-noise fan can be achieved. Even when the air volume decreases, a heat exchange rate equivalent to that of a normal condensing coil can be maintained.

As described above, the soundproof wall 23 and the exhaust duct 2
4 and a sound-absorbing material 25 on these inner surfaces, and by adopting a low-noise exhaust fan 22,
It is possible to reduce the noise by about 6 dB compared to the conventional heat exchange chamber of the same capacity, and even when three heat exchange chambers are installed, the noise is 1.3 dB lower than that of one conventional heat exchange chamber. Can be achieved.

[0023]

As described above, according to the integrated air-cooled refrigerator unit of the present invention, the periphery of the machine room is surrounded by the soundproof wall to which the sound absorbing material is attached, and the sound absorbing material closes the gap formed in the sound insulating wall. In addition, by forming waste heat holes in the top plate (partition plate) of the machine room, noise can be reduced as compared with the conventional type, and waste heat can be appropriately discharged.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing one embodiment of an integrated air-cooled refrigerator unit of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a perspective view of the same.

FIG. 4 is a front view of the same.

FIG. 5 is a side sectional view showing an example of a conventional integrated air-cooled refrigerator unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Integrated air-cooled refrigerator unit 2 Decorative panel 3 Opening 4 Control panel 5 Sound absorbing material 5a Step 6 Sound absorbing material 10 Machine room 11 Compressor 12 Inner panel 12a Inner panel (top plate of machine room) 13 Absorbing material 15 Staggered punching holes 20 Heat exchange chamber 21 Condensing coil 22 Exhaust fan 23 Soundproof wall 24 Exhaust duct 25 Sound absorbing material 30 Eyebolt

Claims (4)

[Claims] 1. A machine room for accommodating a compressor and the like, a condensing coil located above the machine room, through which a high-temperature and high-pressure refrigerant gas discharged from the compressor flows, and for introducing air to the condensing coil. Having an exhaust fan, a heat exchange chamber for exchanging heat between the air and the refrigerant gas and condensing the refrigerant gas,
In an integrated air-cooled refrigerator unit integrally configured by a decorative panel, the peripheral wall and the top plate of the machine room are configured by soundproof walls to which a sound absorbing material is attached, and devices such as the compressor are mounted on the top plate of the machine room. An integrated air-cooled refrigerator unit provided with waste heat holes for discharging waste heat from the refrigerator. 2. The integrated air-cooled refrigerator unit according to claim 1, wherein joint ends between the front and rear walls of the peripheral wall of the machine room and the left and right side walls are sealed with the sound absorbing material. 3. A peripheral wall of the machine room, wherein left and right side walls are formed in a double wall structure of an inner panel and a decorative panel, and a sound absorbing material is interposed between both panels. The integrated air-cooled refrigerator unit according to claim 1 or 2. 4. The integrated air-cooled refrigerator unit according to claim 1, wherein the exhaust fan is surrounded by a soundproof wall, and an exhaust duct is provided above the exhaust fan.