JPH0933070A - Outdoor unit of heat pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor unit of a heat pump which is capable of reducing a bending moment which acts on the bottom of a casing which houses outdoor equipment, and restricting the generation of damage in the bottom of the casing attributable to fatigue and a noise to be produced due to flexural vibration of the bottom. SOLUTION: An engine 12 and a compressor 2, which is driven by the engine 12 and circulates refrigerants in a piping system, are housed in a casing 2 of outdoor equipment 1. Three or more vibration-absorbers 43 are laid out on the surface of a foundation on which the outdoor equipment 1 is set up. A base plate 3 of the casing 2 is supported on these vibration-absorbers 43. A rubber-made mount 16, which mounts the engine 12 on the base plate 3, is laid out on the base plate 3. The vibration-absorbers 43 and the mount 16 are placed at a position where they are nearly overlaid with each other when viewed from the plane.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor unit of a heat pump for driving a compressor by a driving means such as an engine or a motor to circulate a refrigerant in a pipe.

[0002]

2. Description of the Related Art Conventionally, a heat pump has been put into practical use, in which a compressor is driven by an engine provided in an outdoor unit, and thereby a refrigerant is circulated in a pipe to perform cooling / heating and air conditioning. In such an engine-driven heat pump, there may be a problem that vibration accompanying the rotation of the engine and generation of noise accompanying this vibration. Further, even in a heat pump in which a compressor is driven by a motor, for example, in the case of a reciprocating compressor, vibration and noise of the compressor may be a problem. Particularly, when an outdoor unit is installed on the roof of a building, vibration may be transmitted to the building or noise may be heard indoors due to the space for installing the outdoor unit.

For this reason, it is usual to install the outdoor unit on the anti-vibration stand on the rooftop. The anti-vibration mount is disposed between a rectangular frame-shaped lower support member in contact with the rooftop floor, a rectangular frame-shaped upper support member on which the outdoor unit is mounted, and a lower support member and an upper support member. A spring, a hydraulic damper, or a vibration absorber having elasticity or viscoelasticity such as a vibration-proof rubber. Also, to prevent the outdoor unit from collapsing due to external forces such as wind or earthquake, if the upper support member swings vertically in a certain amplitude or more, fix the seismic stopper that contacts the upper support member to the lower support member. Or
If the outdoor unit swings laterally beyond a certain amplitude, a seismic resistant stopper that abuts the side of the outdoor unit is fixed to the lower support member.

[0004]

By the way, conventionally, the outdoor unit has been housed in a housing, and this housing has been placed on a vibration isolation frame. In this case, the engine or the compressor, which is the vibration source of the outdoor unit, is attached to the bottom plate of the housing by a mounting means called a mount that also has a vibration damping effect made of rubber. Then, the vibration absorber of the vibration isolation mount is arranged at a position where the rectangular frame-shaped upper support member and the lower support member are connected to each other, that is, at the end of the vibration isolation mount, regardless of the position of the mount.

In this structure, the vibration of the engine or the compressor is transmitted to the bottom plate of the housing while being attenuated by the mount. This vibration is transmitted as a shearing force in the bottom plate, is further transmitted to the upper support member of the vibration isolation frame, is also transmitted as a shearing force in the vibration isolation frame, and is damped by the vibration absorber.
The vibration thus attenuated is transmitted to the floor surface of the rooftop.

However, in the prior art, as described above, the vibration absorber of the vibration-proof frame is arranged independently of the position of the mount, so that the vibration absorber and the mount are separated from each other, and a large bending moment is generated in the bottom plate. It was working. Therefore, when the heat pump is operated for a long period of time, fatigue may cause cracks at the bottom. Further, the bending moment caused by the vibration may cause the bottom plate to bend and vibrate, which may cause noise.

The present invention has been made in view of the above circumstances, and reduces a bending moment applied to the bottom of a housing that houses an outdoor unit, and suppresses damage to the bottom due to fatigue and generation of noise due to bending vibration of the bottom. It is an object of the present invention to provide an outdoor unit of a heat pump capable of performing.

[0008]

In order to solve the above-mentioned problems, in the outdoor unit of the heat pump according to claim 1, a drive means and a compressor are provided in the outdoor unit, and the compressor is driven by the drive means. A housing that houses the outdoor unit of the heat pump that is driven to circulate the refrigerant in the pipe, and three or more that are mounted on the foundation surface on which the outdoor unit is installed and that support the bottom of the housing. Vibration absorbing means of
And a mounting means disposed on the bottom of the housing for mounting at least one of the drive means and the compressor to the bottom, wherein the vibration absorbing means and the mounting means are at least one flat surface. The feature is that they are arranged at positions that substantially overlap each other when viewed.

In the outdoor unit of the heat pump according to a second aspect, in addition to the configuration according to the first aspect, the plurality of vibration absorbing means are directly provided on at least one of the bottom portion of the housing and the base surface. It is characterized by being attached. In the outdoor unit of the heat pump according to claim 3, in addition to the configuration according to claim 1, at least one of the drive means and the compressor is attached to a central portion of an elastic support plate. The support plate has a plurality of projecting portions projecting outward from the central portion, and the mounting means is arranged at the ends of these projecting portions.
In the outdoor unit of the heat pump according to claim 4, in addition to the configuration according to claim 1 or 2, the vibration absorber is arranged inside a polygon connecting the attachment means adjacent to each other. It is characterized by being.

(Operation) According to the outdoor unit of the heat pump of the first aspect, since the vibration absorbing means and the mounting means are arranged at at least one position so as to be substantially overlapped with each other in plan view, the vibration is generated. Even if occurs, a large bending moment does not act on the bottom part of the housing between the vibration absorbing means and the mounting means. Therefore, damage such as cracks in the bottom due to fatigue can be suppressed, the life of the housing can be maintained for a long time, and bending vibration of the bottom due to bending moment and noise due to this can be prevented. Is.

By the way, a conventional anti-vibration mount has a rectangular frame-shaped lower support member fixed to a concrete foundation surface,
A rectangular frame-shaped upper support member to which the bottom of the outdoor unit is fixed;
The vibration absorbing means is disposed between the lower support member and the upper support member. However, according to the outdoor unit of the heat pump of claim 2, since at least one of the upper and lower support members is abolished and the outdoor unit is directly supported by the vibration absorbing means, the vibration isolation function is provided. It is possible to reduce the weight of the component having the above and to reduce the manufacturing cost thereof.

According to the outdoor unit of the heat pump of claim 3, in comparison with the area occupied by the housing of the outdoor unit,
Even when the area occupied by the driving means or the compressor is small, the mounting means and the vibration absorbing means can be arranged in a superposed state in a plan view. In addition, the distance between the vibration absorbing means that supports the housing can be set regardless of the size of the driving means or the compressor, and by making this distance large, the balance of the entire outdoor unit is not impaired. Further, since the support plate that connects the drive means or the compressor and the attachment means has elasticity, when the vibration occurs due to the operation of the drive means or the compressor, the support plate first damps the vibration. , To the mounting means. Therefore, by utilizing this damping effect, it is possible to further improve the effect of damping the vibration of the entire outdoor unit.

According to the outdoor unit of the heat pump of the fourth aspect, the vibration absorber is arranged inside the polygon formed by connecting the attachment means adjacent to each other. Place the mounting means inside,
Compared to the case where the other conditions are the same, the vibrating region of the bottom is narrowed, and the amplitude transmitted from the mounting means through the bottom is weakened. This makes it possible to improve the effect of damping the vibration of the entire outdoor unit.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. (1) First Embodiment A. First Embodiment Configuration of Heat Pump First, FIG. 1 is a front view showing an outdoor unit 1 of the heat pump according to the first embodiment, and FIG. 2 is a right side view. In the casing (housing) 2 of the outdoor unit 1, columns (not shown) are erected at four corners of a bottom plate (bottom) 3, these columns are connected by beams (not shown), and both side faces surrounded by columns are formed by side plates 5. A front plate 100 and a rear plate 101 for covering the lower portions of the front and rear surfaces shown in FIG.
The front and rear surfaces are covered with a front upper plate 110 having a wire mesh portion 110a and a rear upper wire mesh 111 (FIG. 2), and the ceiling surface is covered with a top plate 6. The inside of the casing 2 is vertically divided by a central partition plate 7, and the upper side thereof is a heat exchange chamber 8 shown in the plan view of the outdoor unit upper part in FIG. 3. The lower side of the central partition plate 7 is an engine room 10 shown in the plan view of the lower part of the outdoor unit in FIG.

An engine 12 is arranged inside the engine room 10 and attached to the bottom plate 3. This engine 1
The mounting structure of 2 will be described later. In the figure, reference numeral G1 indicates the center of gravity of the entire outdoor unit 1 including the engine 12, and G2 indicates the center of gravity of the engine 12.

The engine 12 is a water-cooled gas fuel engine, and a mixture of gas and atmosphere is supplied by the gas mixer 13 shown in FIG. 1, and the mixture is burned to obtain an output. The output of the engine 12 is transmitted to the compressor 22, and the refrigerant is circulated in the pipe by the compressor 22. In this embodiment,
A compressor 22 is mounted on the engine 12.

On the other hand, a fan 23a is arranged in the heat exchange chamber 8. The outdoor heat exchanger 23 and the radiator 39 for cooling the engine 12 are air-cooled by the fan 23a.

Further, in this heat pump, as shown in FIG. 5, a refrigerant circuit 25 including the compressor 22 (22A, 22B) and forming a closed loop, and a cooling water including a water pump 26 and forming a closed loop. And a circuit 27. In the figure, the arrow attached to the refrigerant circuit 25 indicates the flow of the refrigerant during the heating operation in which the four-way valve 35 is set to the heating position.

The refrigerant circuit 25 is a circuit for circulating a refrigerant such as freon by the compressor 22. The refrigerant circuit 25 is arranged such that each of the compressors 22A and 22B is discharged from the oil separator 2 side.
8, a refrigerant line 25a from the oil separator 28 to the four-way valve 35, a refrigerant line 25c from the four-way valve 35 to the three indoor heat exchangers 29,
Expansion valve 30 arranged from each indoor heat exchanger 29
Passing through the accumulator 31 to the outdoor heat exchanger 23, a refrigerant line 25e from the outdoor heat exchanger 23 to the four-way valve 35, and a four-way valve 35.
From the accumulator 31 to the accumulator 31, a refrigerant line 25g from the accumulator 31 to the sub accumulator 31a, and a refrigerant line 25i from the sub accumulator 31a to the suction sides of the compressors 22a and 22b.
And

From the oil separator 28,
An oil return line 32 and a bypass line 25j are guided, and the oil return line 32 is the refrigerant line 25g.
And the bypass line 25j is connected to the refrigerant line 2
The bypass valve 32a is connected to the bypass line 25j. Further, the accumulator 31 is provided with liquid level sensors 34a and 34b for detecting the upper and lower limits of the liquid level of the stored liquid phase, and the sub-accumulator 31a is provided with a liquid level sensor for detecting the upper limit of the liquid level. A surface sensor 34c is provided. The bottom of the accumulator 31 is mainly connected to the refrigerant line 25g by an oil return bypass line 25k, and the bypass line 25k is provided with a bypass valve 33b. In the figure, 25l and 25m respectively indicate bypass lines in which bypass valves are arranged.

Refrigerant line 2 of the refrigerant circuit 25 described above
A high pressure side pressure sensor 37a that detects the high pressure side pressure of the refrigerant is provided at 5b, and a low pressure side pressure sensor 37b that detects the low pressure side pressure of the refrigerant is provided at the refrigerant line 25i. An indoor temperature sensor 37c is provided near the indoor heat exchanger 29, and an outdoor temperature sensor 37d is provided near the outdoor heat exchanger 23. The high pressure side pressure sensor 37a, the low pressure side pressure sensor 37b, the indoor temperature sensor 37c, and the outdoor temperature sensor 37d are connected to a control device (not shown). Further, the control device includes a refrigerant circulation sensor 37 provided in the refrigerant line 25a.
e, the main switch and the desired room temperature setting switch are connected.

On the other hand, the cooling water circuit 27 is a circuit in which the cooling water for cooling the engine 12 is circulated by the water pump 26 as described above. This is from the discharge side of the water pump 26 to the exhaust gas heat exchanger 17. Through the cooling water line 27a reaching the cooling water inlet of the engine 12 (the inlet of the cooling water jacket 12a) and the cooling water outlet of the engine 12 (the outlet of the cooling water jacket 12a).
a, a cooling water line 27b to the a, a cooling water line 27c to the linear three-way valve 38b from the temperature-sensing switching valve 38a, and a linear three-way valve 38b to be guided to the suction side of the water pump 26 through the accumulator 31. Cooling water line 27d, temperature sensitive switching valve 38a and linear three-way valve 38
It is provided with cooling water lines 27e and 27f which are respectively guided from b and are connected to the cooling water line 27d. A radiator 39 is provided in the cooling water line 27f.

When the engine 12 is driven, the compressors 22A and 22B are rotationally driven via an electromagnetic clutch (not shown). Then, the state (pressure P ₁ ,
The enthalpy i ₁ ) vapor-phase refrigerant is sucked into the compressors 22A and 22B from the refrigerant line 25i and compressed, and becomes the high-temperature high-pressure refrigerant in the state (pressure P ₂ , enthalpy i ₂ ) shown in FIG. The compressors 22A and 22B at this time
Required power (compression heat quantity AL is represented by (i ₂ −i ₁ ).
The pressure P ₁ of the vapor-phase refrigerant sucked by the compressors 22A and 22B is detected by the low pressure side pressure sensor 37b and input to the control device.

The high-temperature and high-pressure vapor-phase refrigerant is used in the refrigerant line 2
It is guided to the oil separator 28 through 5a, and the oil component is removed by the oil separator 28. Then, the gas-phase refrigerant from which the oil component has been removed reaches the four-way valve 35 through the refrigerant line 25b. The oil separated from the refrigerant in the oil separator 28 is returned to the refrigerant line 25g through the oil return line 32. Further, the pressure P ₂ (ignoring the pressure loss) of the high-temperature and high-pressure refrigerant flowing through the refrigerant line 25b is detected by the high-pressure side pressure sensor 37a and input to the control device.

During the heating operation, the ports 35a and 35c of the four-way valve 35 are in communication with each other, and the ports 35b and 35d are in communication with each other. As a result, the high-temperature and high-pressure vapor-phase refrigerant flows through the four-way valve 35 to the refrigerant line 25c side and is guided to the indoor heat exchanger 29 that functions as a condenser. Then, the high-temperature and high-pressure gas-phase refrigerant guided to the indoor heat exchanger 29 releases the condensation heat Q ₂ to the indoor air to be liquefied, and the liquid in the state shown in FIG. 6 (pressure P ₂ , enthalpy i ₃ ). It becomes a phase refrigerant, and the heat radiation amount Q ₂ (= i
_2- i ₃ ) heats the room.

Next, the high-pressure liquid-phase refrigerant liquefied in the indoor heat exchanger 29 is decompressed by the expansion valve 30.
In the state (pressure P ₁ , enthalpy i ₃ ) indicated by, a part of the gas is vaporized and flows through the refrigerant line 25 d toward the accumulator 31.

On the other hand, the cooling water circulated in the cooling water circuit 27 by the driving of the water pump 26 is discharged from the water pump 26 and flows through the cooling water line 27a. 12 to exhaust pipe 20
After the heat of the exhaust gas discharged to the engine is recovered and heated, the engine 12 is cooled by passing through the cooling water jacket 12a of the engine 12. And the exhaust gas heat exchanger 17,
The cooling water heated by the engine 12 flows through the cooling water line 27b and reaches the temperature sensitive switching valve 38a.

After the engine 12 is started, the temperature of the cooling water is low, and the temperature sensitive switching valve 38a allows the cooling water to flow to the cooling water line 27e, while stopping the flow to the cooling water line 27c (flow rate I ₁ = 0). When the engine 12 is in the steady operation state, the amount of heat exchange with the exhaust gas heat exchanger 17 and the engine 12 increases, the cooling water temperature rises, and the temperature sensitive switching valve 38a stops the flow to the cooling water line 27e (flow rate I ₂ = 0) On the other hand, the cooling water is supplied to the cooling water line 27c. Linear three-way valve 38b
The control device distributes the cooling water at the flow rate I ₁ to supply the flow rate I ₃ to the cooling water line 27d and the flow rate I ₄ to the cooling water line 27f.

In the accumulator 31, the accumulator 3 is cooled by the cooling water flowing through the cooling water line 27d.
The liquid-phase refrigerant stored in No. 1 is heated, and exhaust heat of the engine 12 (total of heat given by exhaust gas and heat taken from the engine 12 by cooling) is given to the refrigerant. For example, as the outdoor temperature is lower, the amount of heat absorbed by the outdoor heat exchanger 23 decreases, so the flow rate I ₄ is increased (flow rate I _{3 is} decreased),
Exhaust heat to the refrigerant is increased to secure a necessary heat quantity Q ₁ (described later).

The refrigerant flowing through the refrigerant line 25d reaches the outdoor heat exchanger 23 functioning as an evaporator after the liquid phase having passed through the accumulator 31, and when the outside air temperature is above a predetermined value, the fan of the outdoor heat exchanger 23. 23a is driven, and the refrigerant takes heat from the outside air and evaporates in the outdoor heat exchanger 23. Then, the refrigerant is the outdoor heat exchanger 23.
Through the refrigerant line 25e and the four-way valve 35, flows into the refrigerant line 25f, and is introduced into the accumulator 31.

In the accumulator 31, the vapor-phase refrigerant and the liquid-phase refrigerant are separated, and the liquid-phase refrigerant is partly heated by the cooling water flowing through the cooling water line 27d. Part of the liquid-phase medium is evaporated and vaporized by the heat. The gas-phase refrigerant in the accumulator 31 is sent to the sub accumulator 31a through the refrigerant line 25g, and is further sucked into the compressors 22A and 22B through the refrigerant line 25i. Compressors 22A, 22B
The state of the vapor-phase refrigerant sucked in is returned to the state (pressure P ₁ , enthalpy i ₁ ) shown in FIG. 6, and this vapor-phase refrigerant is compressed again by the compressors 22A and 22B and is the same as that described above. The action of is repeated.

Therefore, while the pressure is reduced by the expansion valve 30 and the refrigerant is sucked into the compressors 22A, 22B,
Heat is applied to the refrigerant from the outside air in the outdoor heat exchanger 23, and eventually the refrigerant receives the heat quantity Q ₁ (= i ₁ −i ₃ ) to be evaporated and further heated.

During the cooling operation, the ports 35a and 35b of the four-way valve 35 are in communication with each other, and the ports 35c and 35d are in communication with each other. In this case, the outdoor heat exchanger 23 functions as a condenser, and the indoor heat exchanger 29 functions as an evaporator. In the middle of the refrigerant line 25d flowing from the outdoor heat exchanger 23 to the expansion valve 30, the refrigerant cooled by the outdoor heat exchanger 23 and liquefied is further cooled by the low-temperature liquid refrigerant stored in the accumulator 31. (This is called subcool). The above is the description of the configuration and function of the heat pump that is an example to which the present invention is applied.

It should be noted that, with the couplers 25co and 25do provided in the middle of the refrigerant lines 25c and 25d as boundaries, the devices, the refrigerant lines, the cooling water lines and the like shown on the left and above in FIG. It is housed inside.
Indoor unit 10 including indoor heat exchanger 29 and expansion valve 30
3 is arranged in the building, while the outdoor unit 1 is placed and movably supported on the vibration absorber 43 as described below. Therefore, at least a part of each of the refrigerant lines 25c and 25d is formed by a flexible tube.

B. Mounting Structure of Engine to Casing Next, a mounting structure of the engine 12 to the bottom plate 3 of the casing 2 will be described with reference to FIG. 7. In the figure,
Reference numeral 12a indicates a leg portion that projects to the outside of the lower portion of the engine 12. A horizontal flange 12b is formed on the leg 12a. This flange 12b has bolts 14
And mounting by nut 15 (attachment means) 16
Has been concluded.

The mount 16 is a metal upper flange 1
6a and a metal lower flange 16b facing the 6a
And a rubber columnar damping portion 17 fixed to both flanges 16a and 16b. Lower flange 16b
Are fastened to the bottom plate 3 with bolts 20 and nuts 21. In this way, the engine 12 is connected to the bottom plate 3 via the mount 16, and at the same time, the vibration generated by the operation of the engine 12 is damped by the damping portion 17 of the mount 16 and transmitted to the bottom plate 3. Has become.

C. Mounting structure of casing to foundation surface Now, the bottom plate 3 of the casing 2 of the outdoor unit 1 of the heat pump
Are supported by a vibration absorber (vibration absorbing means) 43.
The upper part of the vibration absorber 43 is detachably fastened to the bottom plate 3 of the outdoor unit 1, and the lower part is attached to the base surface 41. Here, the foundation surface 41 is a concrete floor surface on the roof of a building.

As shown in FIG. 7, each of the vibration absorbers 43 has a lower flange 45, a lower cylindrical portion 46 integrated with the lower flange 45, and an upper cylindrical portion slidable relative to the lower flange 45 in order from the bottom. Four
7. An upper flange 49 integrated with the upper flange 49 is continuously provided. The lower flange 45 is detachably fastened to an anchor bolt 50 embedded in the base surface 41 by a nut 51. The lower cylinder portion 46 has a cylindrical shape, and its lower end is welded to the lower flange 45. The lower tubular portion 46 is open on the upper side, and an elastic body, a viscous body, a viscoelastic body, or a combination thereof is inserted into the inside thereof. In this embodiment, the spring S is used as the elastic body.

The upper cylinder portion 47 is cylindrical, the lower side thereof is open, and the lower cylinder portion 46 is covered so as to surround the lower cylinder portion 46. The upper flange 49 is welded to the upper end of the upper tubular portion 47 and is in contact with the spring S inside the lower tubular portion 46. The upper flange 49 is detachably attached to the bottom plate 3 by the bolt 20 and the nut 21 described above. In this way, the load of the outdoor unit 1 including the engine 12 is supported by the vibration absorber 43 through the bottom plate 3.

Vibration generated by operating the engine 12 is damped by the damping portion 17 of the mount 16, and the lower flange 45 and the upper flange 4 are also damped.
It is damped by the spring S which contacts 9. As a result, the base surface 41 is isolated from vibrations. The lower tube portion 46
The upper cylinder portion 47 serves as a guide when the spring S vibrates.

In this embodiment, four mounts 16 and four vibration absorbers 43 are provided.
The vibration absorbers 43 are arranged vertically so as to overlap each other in plan view. Therefore, the load of the engine 12 is applied from the mount 16 through the bottom plate 3 to the vibration absorber 4 located immediately below the bottom plate 3.
Immediately transmitted to 3.

D. Operation / Effects of Embodiment By the operation of the engine 12 of the outdoor unit 1, the outdoor unit 1 vibrates. This vibration is attenuated by the damping portion 17 of the mount 16, transmitted to the bottom plate 3, and then transmitted to the vibration absorber 43 through the bottom plate 3. In the vibration absorber 43, the load transmission between the upper flange 49 and the lower flange 45 is performed by the spring S as described above. Therefore, the vibration transmitted to the vibration absorber 43 is damped by the spring S, and the base surface 41 is isolated. Therefore, even when the rigidity of the building in which the outdoor unit 1 is installed is not sufficient, it is possible to mitigate the vibration caused by the engine 12 and the noise generated thereby.

Here, the upper and lower mounts 1 are paired.
6 and the vibration absorber 43 are arranged so as to overlap each other in a plan view. Therefore, the load of the engine 12 is immediately transmitted from the mount 16 through the bottom plate 3 to the vibration absorber 43 located therebelow. Therefore, even if vibration is generated by operating the engine 12, a large bending moment does not act on the bottom plate 3 between the mount 16 and the vibration absorber 43. Therefore, damage such as cracks in the bottom plate 3 due to fatigue can be suppressed, and the life of the casing 2 can be maintained for a long time. Further, it is possible to prevent the flexural vibration of the bottom plate 3 due to the bending moment and the generation of noise due to the flexural vibration. In the present embodiment, in consideration of the vibration of the engine 12 via the mount 16 with respect to the bottom plate 3 and the vibration of the bottom plate 3 with respect to the base surface 41 via the vibration absorber 43, the mount 16 and the vibration absorber 43 are unique. It is desirable to properly set the frequency.

Further, in this embodiment, since the mount 16 and the vibration absorber 43 are arranged so as to overlap each other,
In the upper and lower pairs of the mount 16 and the vibration absorber 43, the lower flange 16b of the mount 16 is attached to the bottom plate 3.
The bolt 20 and the nut 21 are used in common for fastening the upper flange 49 of the vibration absorber 43 to the bottom plate 3. Therefore, the number of parts for mounting can be reduced, and the manufacturing cost can be reduced.

Further, the conventional anti-vibration mount has a rectangular frame-shaped lower support member fixed to a concrete base surface, and a rectangular frame-shaped upper support member fixed to the bottom plate 3 of the outdoor unit 1,
The vibration absorber is arranged between the lower support member and the upper support member. However, in this embodiment, such upper and lower support members are eliminated, and the vibration absorber 43 directly connects the outdoor unit 1 to the outdoor unit 1. Since it is made to support, it is possible to reduce the weight of the component having the vibration damping function,
The manufacturing cost can be reduced. However, as will be described later, an upper support member or a lower support member may be added.

Further, in the present embodiment, the lower flange 45 of the vibration absorber 43 is bolted to the base surface 41 and the upper flange 49 is bolted to the bottom plate 3, so that the vibration absorber 43 can be attached and detached. ing. As a result, it is possible to replace the vibration absorber 43 with an appropriate height or frequency according to the building in which the outdoor unit 1 is to be installed. In this case, it is possible to replace the entire vibration absorber 43, or it is possible to take out and replace only the internal spring S.

(2) Second Embodiment A. Configuration of Embodiment Next, an outdoor unit according to a second embodiment of the present invention will be described with reference to FIGS. 9 and 10. In each of the following embodiments, the same components as those in the first embodiment described above are designated by the same reference numerals, and the description thereof will be omitted.

Now, in this embodiment, the mount 16
Are not directly attached to the engine 12, but via the support plate 52.
The support plate 52 is formed of an elastic metal plate material, and as shown in FIG. 10, four narrow overhanging portions 54 have a shape projecting outward from the central portion 53. A seat portion 55 on which the engine 12 is mounted is formed in the central portion 53, and the engine 12 is fixed to the seat portion 55 by bolts 56.

On the other hand, on the upper part of the attenuating portion 17 of the mount 16, a metal fitting with a bolt 57 integrated is embedded. The tip of each overhanging portion 54 is mounted on the mount 16
It is mounted on the attenuating part 17 and is fixed to the attenuating part 17 by a nut 58 screwed to the bolt 57.

B. Operation / Effects of Embodiment According to this configuration, in addition to the same effects as the first embodiment, in comparison with the area occupied by the casing 2 of the outdoor unit 1,
Even when the area occupied by the engine 12 is small, the mount 16 and the vibration absorber 43 can be arranged vertically in series. Moreover, regardless of the size of the engine 12, the gap between the vibration absorbers 43 supporting the casing 2 can be set, and by making this gap large, the balance of the entire outdoor unit is not impaired.

Further, in this structure, since the support plate 52 connecting the engine 12 and the mount 16 has elasticity, when the vibration occurs due to the operation of the engine 12, the support plate 52 firstly fixes this. Attenuate and transmit to mount 16. Therefore, by utilizing this damping effect, it is possible to further improve the effect of damping the vibration of the entire outdoor unit.
In the present embodiment, in addition to the vibration of the engine 12 via the mount 16 with respect to the bottom plate 3 and the vibration of the bottom plate 3 with respect to the base surface 41 via the vibration absorber 43, the support plate 5
It is desirable to appropriately set the natural frequency of the mount 16, the vibration absorber 43, and the support plate 52, etc., in consideration of the vibration node.

(3) Third Embodiment A. Configuration of Embodiment FIGS. 11 and 12 show an outdoor unit according to a third embodiment of the present invention. This embodiment is different from the first embodiment in that the mount 16 and the vibration absorber 43 are not arranged in series. However, in that the upper and lower pairs of the mount 16 and the vibration absorber 43 are arranged at positions that substantially overlap each other in plan view,
This is the same as the first embodiment.

In the example shown in FIG. 11, if the axial distance between the vibration absorbers 43 is 2A and the axial distance between the mounts 16 is 2B, then 2A <2B. Then, as shown in FIG. 12, which is a bottom plan view, the mounts 1 that are substantially overlapped with each other
When the axial distance between 6 and the vibration absorber 43 is C, C <A. The polygon (rectangular in this embodiment) connecting the adjacent vibration absorbers 43 is arranged inside the polygon (rectangular in this embodiment) connecting the adjacent mounts 16.

B. Function and Effect of Embodiment As described above, in this embodiment, the distance between the vibration absorbers 43 is shorter than the distance between the mounts 16. Thereby, the bending moment generated in the bottom plate 3 can be reduced. Conversely, the distance between the vibration absorbers 43 may be set longer than the distance between the mounts 16 and the other conditions may be the same. in this case,
The resistance of the vibration absorber 43 to the lateral shake of the entire outdoor unit 1 can be enhanced.

(4) Fourth Embodiment A. Configuration of Embodiment Next, FIG. 13 shows an outdoor unit according to a fourth embodiment of the present invention. In this embodiment, similarly to the third embodiment, the mount 16 and the vibration absorber 43 are not arranged in series. However, the mount 16 and the vibration absorber 43, which are paired up and down, are arranged at positions that substantially overlap each other in plan view.

In this embodiment, the mount 16 is
It is installed as follows. First, engine 1
A mounting bracket 12c is fixed to the lower part of 2, and a mounting bracket 60 is fixed to the bottom plate 3 of the casing 2. Four mounts 16 are provided, and the mounting bracket 12
Four c and 60 are provided according to the number of mounts 16.

The fittings 12c and 60 have extending portions 12d and 60a extending obliquely, respectively, and the extending portions 12d and 60a are opposed to each other so as to be substantially parallel to each other. There is. And the bolt 59
However, the extending portions 12d, the damping portion 17 of the mount 16, and the extending portion 60a are penetrated, and nuts are screwed to both ends of the bolt 59. In this way, mount 16
Is attached to the fittings 12c and 60 in an inclined state. The center axis of each mount 16 in the compression direction passes near the center of gravity G2 of the engine 12.

When the distance between the axes of the vibration absorbers 43 is D and the distance between the mounts 16 is E, D <E. Then, the mount 16 and the vibration absorber 43 which are almost overlapped with each other.
The distance in plan view of is much smaller than that of C. Further, the polygon connecting the adjacent vibration absorbers 43 is
The mounts 16 are arranged inside a polygon connecting adjacent mounts 16.

B. Operation / Effects of Embodiment According to this configuration, in addition to the same effects as in the first embodiment, it is not possible to increase the distance between the engine 12 and the bottom plate 3 due to restrictions on the place where the outdoor unit is installed. However, it is possible to provide the mount 16.

(5) Modifications Various modifications can be made to the above embodiment as follows. In the above-described embodiment, the vibration absorber 43 is directly attached to the base surface 41 and the bottom plate 3 is directly attached to the vibration absorber 43. However, between the base surface 41 and the vibration absorber 43 or the vibration absorber 43.
It is also possible to provide a beam or a plate between the bottom plate 3 and the bottom plate 3. FIG. 8 shows a supporting member 4 which can be provided in this case.
2 is shown. The support member 42 is formed of a plate material in a rectangular frame shape, and through holes 42a for inserting bolts are formed at four corners thereof. And the support member 4
2 is provided between the base surface 41 and the vibration absorber 43, and the vibration absorber 43
When used as a lower support member of the through hole 42a
Anchor bolt 50 is inserted into and the nut 51 is fastened together with the lower flange 45 of the vibration absorber 43. Further, the support member 42 is provided between the vibration absorber 43 and the bottom plate 3, and the vibration absorber 43
When used as an upper support member of the through hole 42a
Then, the bolt 20 is inserted into and the nut 21 is fastened together with the upper flange 49 of the vibration absorber 43, the bottom plate 3, and the lower flange 16b of the mount 16. The support member is not limited to such a rectangular frame-like member, and a pair of long plate members can be arranged in front of or behind the outdoor unit 1.

In the above embodiment, the spring S, which is an elastic body, is used as the vibration absorbing body 43. However, in addition, a viscous body such as a hydraulic damper, a viscoelastic body such as rubber, or a combination thereof may be used. Good. In the above-described embodiment, the purpose is to prevent vibration caused by the engine 12 in the outdoor unit 1 of the heat pump provided with the engine 12, but the present invention is not limited to this. For example, even in a heat pump that uses a low-vibration driving means such as a motor instead of the engine, large vibration can occur in a heat pump that uses a reciprocating compressor. Therefore, it is possible to apply the present invention to prevent the vibration caused by the operation of the compressor. The attachment means for attaching the engine 12 to the bottom plate 3 is not limited to the rubber mount 16 and may be, for example, the vibration absorber 43.
A vibration absorber having the same structure as that of can also be used as the attachment means.

[0062]

As described above, according to the present invention, damage such as cracks at the bottom due to fatigue can be suppressed, the life of the housing can be maintained for a long time, and bending moment It is possible to prevent the flexural vibration of the bottom and the resulting noise.

[Brief description of drawings]

FIG. 1 is a front view showing an outdoor unit of a heat pump according to a first embodiment of the present invention.

FIG. 2 is a right side view showing the outdoor unit of the heat pump according to the first embodiment.

FIG. 3 is a top plan view of the outdoor unit of the outdoor unit of the heat pump of the first embodiment taken along the line III-III in FIG.

FIG. 4 is a bottom plan view of the outdoor unit of the outdoor unit of the heat pump of the first embodiment taken along the line IV-IV of FIG.

FIG. 5 is a diagram showing a refrigerant circulation system of the heat pump of the first embodiment.

FIG. 6 is a diagram showing a heat exchange cycle of a refrigerant in the heat pump of the first embodiment.

FIG. 7 is a cross-sectional view showing a main part of the first embodiment.

FIG. 8 is a perspective view showing an example of a support member used in a modification.

FIG. 9 is a front view showing an outdoor unit of the heat pump according to the second embodiment of the present invention.

10 is a view taken along line XX of FIG.

FIG. 11 is a front view showing an outdoor unit of the heat pump according to the third embodiment of the present invention.

12 is a view taken along line XII-XII in FIG.

FIG. 13 is a front view showing an outdoor unit of the heat pump according to the fourth embodiment of the present invention.

[Explanation of symbols]

 1 Outdoor Unit, 2 Casing (Housing), 3 Bottom Plate (Bottom), 4 Struts, 12 Engine (Drive Means), 16 Mount (Mounting Means), 22 Compressor, 41 Basic Surface, 43 Vibration Absorbing Means (46) Lower cylinder part, 47 Upper cylinder part, S spring

Claims (4)

[Claims] 1. An outdoor unit is provided with a drive means and a compressor,
A housing for accommodating the outdoor unit of the heat pump configured to drive the compressor by the driving unit to circulate the refrigerant in the pipe, and the housing placed on the foundation surface on which the outdoor unit is installed, 3 or more vibration absorbing means for supporting the bottom portion of the housing, and an attaching means arranged on the bottom portion of the housing for attaching at least one of the driving means and the compressor to the bottom portion. An outdoor unit for a heat pump, characterized in that the mounting means and the mounting means are arranged at least at one position so as to substantially overlap each other in a plan view. 2. The outdoor unit for a heat pump according to claim 1, wherein the plurality of vibration absorbing means are directly attached to at least one of a bottom portion of the housing and the base surface. 3. At least one of the driving means and the compressor is attached to a central portion of a supporting plate having elasticity, and the supporting plate has a plurality of projecting portions projecting outward from the central portion. The outdoor unit of the heat pump according to claim 1, wherein the attaching means is arranged at the ends of the projecting portions. 4. The outdoor unit for a heat pump according to claim 1, wherein the vibration absorber is disposed inside a polygon connecting the attachment means adjacent to each other.