JPH0658180B2 - Heat exchange unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a heat exchange unit in which a housing contains a compressor.

(B) Conventional Technology As a structural example of a heat exchange unit having a compressor incorporated in a housing, the one shown in Japanese Utility Model Laid-Open No. 61-44165 has been started. According to this content, the compressor is arranged on the bottom plate of the housing, and the valve base is fixed to the edge of the bottom plate. The valve base is equipped with a connecting tool for connecting the piping between the units. The connecting tool and the compressor are connected by a refrigerant pipe. Further, the outer plate of the housing is attached to this valve base.

(C) Problems to be solved by the invention In such a heat exchange unit, particularly when a compressor whose rotation speed can be changed according to the air conditioning load is incorporated into this heat exchange unit, the rotation speed of the compressor becomes high. The vibration of the compressor is transmitted to the valve base through the refrigerant pipes, and as a result, the outer plate connected to the valve base may also vibrate, and the noise of the heat exchange unit may increase.

The present invention has an object to suppress the noise generated from the heat exchange unit to a low level even if the vibration of the compressor is transmitted to the valve base and the outer plate of the unit.

(D) Means for Solving Problems In order to achieve this object, the present invention provides a compressor with a mounting plate on the bottom plate of the housing, and connects the unit-to-unit piping to the mounting plate. A connecting tool is attached, and the connecting tool and the compressor are connected by a refrigerant pipe, and the outer plate on the side of the mounting plate is made of a damping steel plate.

(E) Action The outer plate fixed to the mounting plate is made of a damping steel plate so that the noise of the outer plate can be kept low even if the vibration of the compressor is transmitted to this mounting plate through the refrigerant pipe.

(F) Embodiment In FIG. 1, reference numeral 1 is an outdoor heat exchange unit of a separation type air conditioner. Reference numeral 2 denotes a bottom plate of this unit, which is bent into a substantially L shape and is integrally molded with the back plate 3. A partition plate 4 divides the bottom plate into a machine region 5 and a heat exchange region 6, and a front edge 7 of the plate is fixed to a rising edge 8 of the bottom plate 2. 9 is a right side tube plate of the heat exchanger 9, the heat exchanger 11 standing facing the inlet 10 of the back plate 3, the front piece 12 is the rear edge 13 of the partition plate 4, and the rear piece 14 is the back plate. Fixed to 3, respectively.

A compressor 15 is mounted on the machine area 5 of the bottom plate 2. The compressor 15 receives an input from a frequency output power supply device capable of varying the power supply frequency from 30 Hz to 125 Hz.
The number of rotations of the electric motor in 5 changes. 16
Is a discharge pipe extending upward from the upper surface of the compressor 15, and the reverse U
It is bent in the shape of a letter and its tip 17 faces downward. A four-way valve 18 controls the refrigerant discharged from the compressor 15, and is a refrigerant pipe bent downward in a U shape.
Is provided, and this pipe 19 is connected to the tip 17 of the discharge pipe 16 of the compressor 15 described above. Reference numeral 20 denotes a mounting plate (valve base) mounted from the right edge 21 of the bottom plate 2 to the rising piece of the back plate 3, and a raised portion 22 at the center.
Are formed. Reference numeral 23 is a notch formed in the mounting plate 20, and an opening is located at the front edge of the mounting plate 20. As shown in FIG. 2, the valve 2 is provided in the notch 23.
The refrigerant pipes 25 and 26 connected to the valve 4 are inserted, and the valve 24 is fixed to the raised portion 22. The one refrigerant pipe 26 is directly connected to the pipe 27 extending above the four-way valve 18. 28 is a fan motor base, one end 29 is fixed to the protrusion 30 of the bottom plate 2, and the other end 31 is locked to the upper portion 32 of the heat exchanger 9. 33 is a fan, and 34 is a motor for driving this fan, which is attached to the motor base 28.

Reference numeral 35 denotes a front panel, the lower edge 36 is engaged with the front edge 8 of the bottom plate 2, and the upper edge 37 is screwed to the other end 31 of the fan motor base 28. An outlet grill 38 is attached to the front panel 35. 39 is a left side panel which is applied from the left side of the unit. Reference numeral 40 is an inlet provided on the left side panel.

41 is a right side panel (outer plate), which is applied from the right side of the unit 1. The right side panel 41 is formed with an opening 42 for taking out electrical components and a notch 43 for exposing the valve base 20. A packing material (not shown) is attached to the inner peripheral surface 44 of the notch 43 so that the gap between the valve base 20 and the peripheral surface of the notch 43 is sealed with the packing material. The upper edge 45 of the right side panel 41 is the flange piece 4 of the top plate of the front panel 35.
6, the lower edge 47 is screwed to the rising piece 21 of the bottom plate 2, respectively. As shown in FIG. 3, the right side panel 41 is called a damping steel plate in which a film-shaped resin 49 having a thickness of 0.1 mm is sandwiched between two steel plates 48 having a thickness of 0.4 mm to be integrated. It is a molded product.

Fig. 4 shows a comparison of noise values when the heat exchange unit using the above-mentioned damping steel plate on the right side panel and the heat exchange unit using the 0.8 mm thick steel plate on the right side panel were operated respectively. As shown, the noise measurement points are 1 m in front of the heat exchange unit and 1 m behind it.

It can be seen from FIG. 4 that the operating frequency of the compressor is 10
In the case of 0 Hz or less, there is not much difference between the noise value of the heat exchange unit using the damping steel plate and the noise value of the heat exchange unit using the 0.8 mm thick steel plate. However, 100
When the frequency becomes higher than Hz, the noise value of the heat exchange unit using damping steel plate is suppressed by about 1 to 4 dB lower than the noise value of the heat exchange unit using 0.8 mm thick steel plate. It was This is because the rotation speed of the electric motor in the compressor 15 becomes high, and the vibration of the compressor 15 causes the refrigerant pipes 16, 27, 26 to vibrate.
Although the right side surface pulse 41 that is transmitted to the valve base 20 through the valve contacting the valve base 20 oscillates, in the heat exchange unit using the damping steel plate for the right side surface pulse,
It is probable that the noise on the right side panel was kept low.

In addition, the above-mentioned damping steel plate is two steel plates 48 with a thickness of 0.4 mm.
Although a 0.1 mm-thick resin 49 was sandwiched between the two, as another example of the vibration-damping steel plate, a 0.05 mm-thick steel plate having a thickness of 0.4 mm and a steel plate having a thickness of 0.7 mm was used. Use the resin sandwiched, and attach the right side panel to this unit so that the 0.7 mm thick steel plate is on the outside of the heat exchange unit and the 0.4 mm thick steel plate is on the inside of the unit. Is also good. In this way, for example, the right side panel 41 is attached to the edge 21 of the bottom plate 2.
Touch this panel to the panel 4 with tapping screws
When fixing 1 and the bottom plate 2, since the screw bites into the thicker steel plate (thickness 0.7 mm) first, this screw is easily screwed into the panel.

(G) Effect of the Invention As described above, according to the present invention, the housing is provided with the mounting plate, the refrigerant pipe connected to the compressor is fixed to the mounting plate, and the damping plate is formed of the damping steel plate. Since the outer plate of the housing is applied, even if vibration generated during operation of the compressor is transmitted to this outer plate through the refrigerant pipe and the mounting plate, the noise of this outer plate is suppressed to a low level and the noise of the unit is reduced. It can be kept low.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show one embodiment of the heat exchange unit of the present invention. FIG. 1 is an exploded perspective view of the unit, FIG. 2 is an enlarged perspective view of FIG. 1, and FIG. Right side panel (outer plate) of the unit
FIG. 4 is a noise level characteristic diagram when the unit is operated. 15 ... Compressor, 20 ... Mounting plate (valve base), 24 ...
… Connectors (valves), 16, 26, 27 ... Refrigerant piping,
41 ... Outer panel (right side panel).

Claims (1)

[Claims] 1. A heat exchange unit having a casing, a compressor, a refrigerant pipe connected to the compressor and provided with a connector at a tip thereof, and a mounting plate to which the connector is fixed. A heat exchange unit, characterized in that the outer plate of the casing of is made of a damping steel plate.