JPH11117862A - Oscillating compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain a top clearance always to a minimum by linking movable elements formed of a movable element of a motor, a piston, and the like, with fixed elements formed of a stator of the motor, a block, and the like through elastic elements, and making a cylinder axially movable in relation to the block. SOLUTION: In the case of lowering refrigerating capacity during the operation of a compressor, applied voltage to a motor 3 is lowered to lower the stroke quantity of a piston 5 linked with a stator 3a of the motor 3 through an elastic element 8. At this time, top clearance volume is about to increase in association with a lowering of the stroke quantity, but a cylinder 15 is moved toward an anti-compression chamber 9 by a driving element 16 so as to suppress the increase of a top clearance and to maintain a fixed top clearance. At the time of increasing refrigerating capacity, the stroke quantity of the piston 5 is increased, but at this time, the cylinder 15 is moved to the anti-piston 5 side to maintain the fixed top clearance in the same way.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibrating compressor used for refrigerators, air conditioners and the like.

[0002]

2. Description of the Related Art A conventional vibratory compressor is disclosed in
There is one described in Japanese Patent Application No. 1-57009. Hereinafter, the above-mentioned conventional vibration type compressor will be described with reference to the drawings.

FIG. 6 shows a conventional vibratory compressor. In FIG. 6, 1 is a closed casing, and 2 is a main body. The motor 3 includes a stator 3a and a mover 3b, and the mover 3b is fixed to the piston 5. Body 2
Is composed of a movable element 12 composed of a movable element 3b of the motor 3, a piston 5, and the like, and a fixed element 13 composed of a cylinder 4, a stator 3a of the motor 3, a block 6, and the like. (Not shown), it is elastically supported in the closed casing 1. Reference numeral 11 denotes a lubricating oil, which is stored in a lower portion of the closed casing 1.

The elastic element 8 is formed by stacking a plurality of elastic bodies 8a, an inner peripheral portion 8b of the elastic element 8 is fixed to the piston 5, and an outer peripheral portion 8c of the elastic element 8 is
It is fixed to.

[0005] The cylinder 4 and the elastic element 8 support the piston 5 so that the piston 5 can move in the axial direction. 9 is a compression chamber composed of the cylinder 4 and the piston 5.

Next, the mechanism of the vibrating compressor will be described. When the AC power supply is half-wave rectified and the stator 3a is energized, the mover 3b fixed to the piston 5 is fixed to the stator 3a.
It is attracted in the direction of the magnetic pole a by the principle of magnetic variable resistance.
At the time of suction, the piston 5 is pushed in the opposite direction by the elastic force stored in the elastic element 8 disposed between the mover 3b and the block 6, and the piston 5 reciprocates in the axial direction by repeating this operation.

[0007] Refrigerant gas from a cooling system (not shown) is guided to a low-pressure chamber 7a of the cylinder head 7 through a suction valve (not shown) provided in the cylinder head 7.
It reaches the compression chamber 9 in the cylinder 4. The refrigerant gas that has reached the compression chamber 9 is compressed by the reciprocating motion of the piston 5 described above.

The compressed refrigerant gas is supplied to the cylinder head 7
Once discharged into a high-pressure chamber 7b in the cylinder head 7 via a discharge valve (not shown) disposed therein, the liquid is discharged to the system.

[0009]

However, in the above conventional configuration, since the position of the cylinder 4 is fixed,
The refrigerating capacity is controlled by controlling the stroke amount of the piston 5 by the motor 3
The top clearance at the top dead center of the piston 5 increased as the stroke decreased, and efficient operation was not possible.

The present invention solves the conventional problems,
The top clearance can be minimized at any piston stroke, and efficient operation can always be performed.

In addition, in the above-mentioned conventional configuration, since the position of the cylinder 4 is fixed, the control of the refrigerating capacity can be performed only by adjusting the amount of stroke of the piston 5 to the voltage applied to the motor 3; For the control, some detection means and control means are required, and the efficiency is low.

The present invention solves the conventional problems.
At the time of high outside temperature, where a lot of refrigeration capacity is required in refrigeration equipment such as an actual refrigerator, the stroke is automatically adjusted to a long stroke so that the refrigeration capacity is not insufficient.
By automatically adjusting the stroke to a low stroke, an efficient operation can be performed according to the operating conditions without using another detecting means or control means.

Further, in the above-described conventional configuration, at the time of startup, the stroke of the piston 5 increases with time.
Therefore, it takes time until the top clearance becomes sufficiently small, and it takes time until the refrigeration equipment reaches a predetermined temperature, and the efficiency is poor.

The present invention solves the conventional problems.
Even with a small stroke operation at start-up, it is possible to operate with a small top clearance volume, enabling efficient operation and stabilizing the cylinder position during normal operation as compared to controlling the cylinder position only by gas pressure difference. The occurrence of vibration and noise can be prevented.

Further, in the above-described conventional configuration, when the operating pressure condition changes, the stroke amount of the piston 5 increases,
There is a possibility that the piston 5 collides with the discharge valve 9a, causing breakage or noise.

The present invention solves the conventional problem. Even when the operating pressure condition changes, the piston position can always be adjusted to the optimum piston position, so that the top clearance can always be minimized and efficient operation can be achieved. In addition to this, even if the stroke amount of the piston increases, it is possible to prevent the piston from colliding with the discharge valve beforehand, thereby preventing damage and noise caused by the piston colliding with the discharge valve.

Further, in the above-described conventional configuration, since the vibration in the axial direction is large, the amplitude stress of the discharge pipe 10 is large, and the discharge pipe 10 may be damaged.

The present invention solves the conventional problems, and reduces the stress due to the repetitive amplitude of the discharge pipe or the suction pipe because the discharge pipe or the suction pipe can move in the axial direction even if the vibration in the axial direction is large. Thus, it is possible to prevent the discharge pipe or the suction pipe from being damaged and to prevent the discharge pipe or the suction pipe from being damaged due to the movement of the cylinder even when the cylinder is moved.

[0019]

To achieve this object, a vibration type compressor according to the present invention comprises a closed casing having a refrigerant gas space, a block housed in the closed casing, a stator and a mover. A part of a configured motor, a piston to which a mover of the motor is connected, a movable element configured by a mover and a piston of the motor, and a fixed element configured by a stator and a block of the motor. It comprises an elastic element fixed to the movable element, a part of which is fixed to the fixed element, a cylinder movable in the axial direction with respect to the block, and a drive element moving the cylinder in the axial direction.

As a result, the top clearance can be minimized for any piston stroke, and efficient operation can always be performed.

Further, a motor comprising a closed casing having a refrigerant gas space, a block housed in the closed casing, a stator and a mover, a piston to which the mover of the motor is connected, and a motor A movable element configured by a mover or a piston, a fixed element configured by a stator or a block of a motor, and an elastic element partially fixed to the movable element and partially fixed to the fixed element, A cylinder movable with respect to the block, a cylinder head fixed to the cylinder, and at least two cylinders in the refrigerant gas space in the closed casing with a cylinder or a cylinder head or a cylinder member integrated with the cylinder and the cylinder head as boundaries. A back pressure chamber formed by division, at least one of the back pressure chambers is set to a low pressure, and at least one other chamber is set to a low pressure. It is composed of a high pressure from the force.

[0022] With this arrangement, at a high outside temperature where a large amount of refrigerating capacity is required in a refrigerating device such as an actual refrigerator, the long stroke is automatically adjusted so that the refrigerating capacity is not insufficient. Thus, the stroke can be adjusted to a low stroke, and efficient operation can be performed according to the operating conditions without using another detecting means or control means.

Further, the elastic member has one end locked to the cylinder or the cylinder head and the other end locked to a fixing element.

This makes it possible to operate with a small top clearance volume even in a small stroke operation at the time of startup, thereby enabling efficient operation, and also in a normal operation, as compared to a case where the cylinder position is controlled only by the gas pressure difference. The position can be stabilized, and the generation of vibration and noise can be prevented.

Further, it comprises a cylinder position detecting sensor fixed to either the fixed element or the cylinder.

Thus, even if the operating pressure condition changes,
Since the piston position can always be adjusted to the optimal position relative to the cylinder position, top clearance can always be minimized and efficient operation can be achieved.Also, even if the piston stroke increases, the piston does not collide with the discharge valve. To prevent damage and noise caused by the piston colliding with the discharge valve.

Further, a motor comprising a closed casing having a refrigerant gas space, a block housed in the closed casing, a stator and a mover, a piston to which the mover of the motor is connected, and a motor A movable element configured by a mover or a piston, a fixed element configured by a stator or a block of a motor, and an elastic element partially fixed to the movable element and partially fixed to the fixed element, A cylinder fixed or axially movable with respect to the block, a cylinder head fixed to the cylinder, and one end movably held by a discharge pipe or a suction pipe,
The other end is fixed to either the cylinder or the cylinder head, and is constituted by a first discharge pipe or a first suction pipe movable in the axial direction.

Thus, even if the axial vibration is large,
Since the discharge pipe or the suction pipe can move in the axial direction, the stress due to the repetitive amplitude of the discharge pipe or the suction pipe can be reduced, preventing the discharge pipe or the suction pipe from being damaged, and discharging even if the cylinder moves. Pipe breakage can be prevented.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention relates to a motor comprising a closed casing having a refrigerant gas space, a block housed in the closed casing, a stator and a mover. , A piston to which the mover of the motor is connected, a movable element composed of the mover and piston of the motor, a fixed element composed of the stator and block of the motor, and a part fixed to the movable element An elastic element partially fixed to a fixed element, a cylinder movable in the axial direction with respect to the block, and a drive element moving the cylinder in the axial direction,
The top clearance can be minimized at any piston stroke, and the operation can always be performed efficiently.

According to a second aspect of the present invention, there is provided a motor including a closed casing having a refrigerant gas space, a block housed in the closed casing, a stator and a mover, and a movable motor. The piston is connected with the child, the movable element composed of the motor mover and piston, the fixed element composed of the motor stator and block, etc. An elastic element fixed to the fixed element, a cylinder movable with respect to the block, a cylinder head fixed to the cylinder, and a cylinder or a cylinder head or a cylinder and a cylinder head integrated in the refrigerant gas space in the closed casing. A back pressure chamber formed at least in two parts with the cylinder member as a boundary, and at least one of the back pressure chambers is set to a low pressure. At least one of the other chambers is provided with a low pressure to a high pressure, and in a high outside temperature where a large amount of refrigeration capacity is required in a refrigeration apparatus such as an actual refrigerator, automatically, so that the refrigeration capacity is not insufficient. By adjusting the stroke to a long stroke and automatically adjusting the stroke to a low stroke when the temperature is low outside air, it is possible to operate efficiently according to the operating conditions without using another detection means or control means. Have.

According to a third aspect of the present invention, there is provided an elastic body having one end locked to a cylinder or a cylinder head and the other end locked to a fixed element. Even with a small stroke operation, operation with a small top clearance volume is possible, and it is possible to operate efficiently, and even in normal operation, the cylinder position can be stabilized compared to the case where the cylinder position is controlled only by the gas pressure difference and vibration It has an effect that generation of noise and noise can be prevented.

According to a fourth aspect of the present invention, there is provided a cylinder position detecting sensor fixed to one of a fixed element and a cylinder. The piston position can always be adjusted to the optimum position, minimizing the top clearance and ensuring efficient operation.Also, even if the piston stroke increases, the piston can be prevented from colliding with the discharge valve in advance. This has the effect of preventing damage and noise caused by the piston colliding with the discharge valve.

According to a fifth aspect of the present invention, there is provided a motor including a closed casing having a refrigerant gas space, a block housed in the closed casing, a stator and a mover, and a movable motor. The piston is connected with the child, the movable element composed of the motor mover and piston, the fixed element composed of the motor stator and block, etc. An elastic element fixed to the fixed element, a cylinder fixed or axially movable with respect to the block, a cylinder head fixed to the cylinder, and one end movably held by the discharge pipe or the suction pipe, and the other end. Is fixed to either the cylinder or the cylinder head, and has a first discharge pipe or a first suction pipe movable in the axial direction. However, since the discharge pipe or the suction pipe can be moved in the axial direction, the stress due to the repetitive amplitude of the discharge pipe or the suction pipe can be reduced, preventing the discharge pipe or the suction pipe from being damaged, and even if the cylinder moves. This has the effect of preventing the discharge pipe from being damaged by the movement.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. The same components as those of the related art are denoted by the same reference numerals, and detailed description is omitted.

(Embodiment 1) Embodiment 1 of the present invention
Will be described. FIG. 1 is a longitudinal sectional view of a vibrating compressor according to a first embodiment of the present invention.

In FIG. 1, reference numeral 15 denotes a cylinder, which is integrated with the cylinder head 7 and is provided so as to be movable to a block. The cylinder 15 is connected by a driving element 16 so as to be movable in the axial direction.

The operation of the vibrating compressor configured as described above will be described below. If it is desired to reduce the refrigerating capacity during the operation of the compressor, the stroke amount of the piston 5 is reduced by reducing the voltage applied to the motor 3.

At this time, as the stroke amount of the piston 5 decreases, the top clearance volume also tends to increase, but the driving element 16 moves the cylinder 15 to the anti-compression chamber 9.
By moving in the direction, an increase in the top clearance can be prevented, and a constant top clearance can be maintained. Therefore, the re-expansion loss can be reduced, and a decrease in efficiency can be prevented.

When increasing the refrigerating capacity, the stroke applied to the piston 5 is increased by increasing the voltage applied to the motor 3.

At this time, the top clearance volume decreases due to the increase in the stroke of the piston 5, and the piston 5 and the cylinder head 7 try to collide.
At this time, by moving the cylinder 15 to the side opposite to the piston 5 by the drive element 16, the top clearance volume is increased, and the collision between the piston 5 and the cylinder head 7 can be prevented.

As described above, the motor including the closed casing having the refrigerant gas space, the block housed in the closed casing, the stator and the mover,
The piston to which the mover of the motor is connected, the movable element constituted by the mover and the piston of the motor, the fixed element constituted by the stator and the block of the motor, etc., are partially fixed to the movable element, Equipped with an elastic element partially fixed to the fixed element, a cylinder that can move in the axial direction with respect to the block, and a drive element that moves the cylinder in the axial direction. It is possible to minimize it, and it is possible to always perform efficient operation.

(Embodiment 2) FIG. 2 is a longitudinal sectional view of a vibrating compressor according to a second embodiment of the present invention.

In FIG. 2, reference numeral 15 denotes a cylinder, which is sandwiched between convex portions 17a and 17b provided on the block 6 so that the cylinder 17 can move in the axial direction. Reference numeral 18 denotes a back pressure chamber. In FIG. 2, two chambers 18a and 18b are formed.
Back pressure tubes 19a, 19b communicating with the outside of the closed casing 1
Are arranged. Reference numeral 20 denotes a suction pipe which communicates directly from the cylinder head 7 to the outside of the closed casing 1 in FIG.

Reference numeral 21 denotes a pressure control mechanism, which includes four pressure control valves 21a, 21b, 21c, 21d, and pressure guide tubes 21e, 21 from the suction pipe 20 to the pressure control valves 21a, 21b.
f, pressure guide pipes 21g and 21h from the discharge pipe 10 to the pressure control valves 21c and 21d, and pressure pipes 21i and pressure control valves 21b and 21 from the pressure control valves 21a and 21c to the back pressure pipe 19a.
d to the back pressure tube 19b, and is disposed between the back pressure tube 19, the suction tube 20, and the discharge tube 10.

The operation of the vibrating compressor constructed as described above will be described below. The pressure control mechanism 21
The pressures derived from the low pressure in the suction pipe 20 and the high pressure in the discharge pipe 10 are controlled by pressure control valves 21a, 21c and 21.
b, 21d to form an arbitrary pressure from a low pressure to a high pressure.
b.

First, in the case of operation at high outside air temperature, etc.,
If more capacity is required than normal refrigeration capacity,
By closing the pressure control valve 21c and opening the pressure control valve 21a, the pressure in the back pressure chamber 18a becomes a low pressure.

On the other hand, the pressure in the back pressure chamber 18b is adjusted by opening the pressure control valve 21d and closing the pressure control valve 21b.
Since the internal pressure of the cylinder 8b changes from a low pressure to a high pressure, the pressure difference between the back pressure chambers 18a and 18b causes the cylinder 15 integrated with the cylinder head 7 to move in the direction of the protrusion 17a.

At this time, the top clearance increases with the movement of the cylinder 15, but the stroke amount increases by increasing the voltage value applied to the motor 3 in order to keep the top clearance constant.

Therefore, at a high outside temperature where a large amount of refrigeration capacity is required, the refrigeration capacity can be automatically adjusted to a long stroke so that the refrigeration capacity is not insufficient, and the operating conditions can be adjusted without using another detecting means or control means. In this way, efficient operation can be performed.

Next, in the case of low outside air temperature operation,
When reducing the capacity more than the normal refrigeration capacity,
By closing the pressure control valve 21a and opening the pressure control valve 21c, the pressure in the back pressure chamber 18a becomes a high pressure.

On the other hand, the pressure in the back pressure chamber 18b is increased by opening the pressure control valve 21b and closing the pressure control valve 21d.
8b is a low pressure, so the back pressure chamber 18a,
Due to the pressure difference with the cylinder head 18b, the cylinder 15 integrated with the cylinder head 7 moves in the direction of the protrusion 17b.

At this time, the top clearance decreases with the movement of the cylinder 15, but the stroke amount is reduced by decreasing the voltage value applied to the motor 3 in order to keep the top clearance volume constant.

Therefore, when the outside air temperature is low, the stroke can be automatically adjusted to a low stroke, and efficient operation can be performed according to the operating conditions without using another detecting means or control means.

As described above, the motor including the closed casing having the refrigerant gas space, the block accommodated in the closed casing, the stator and the mover, and the piston to which the mover of the motor is connected. , A movable element composed of a motor mover or a piston, a fixed element composed of a motor stator or a block, and a part fixed to the movable element and an elastic part fixed to the fixed element The element, the cylinder movable with respect to the block, the cylinder head fixed to the cylinder, and the cylinder or cylinder head or the cylinder member integrated with the cylinder and cylinder head in the refrigerant gas space in the closed casing. Back pressure chamber formed by dividing at least two, and at least one of the back pressure chambers to a low pressure,
At least one of the other chambers is provided with a low pressure to a high pressure, and in a high outside temperature where a large amount of refrigeration capacity is required in a refrigeration apparatus such as an actual refrigerator, automatically, so that the refrigeration capacity is not insufficient. By adjusting to a long stroke and automatically adjusting to a low stroke at a low outside air temperature, efficient operation can be performed according to the operating conditions without using another detecting means or control means.

In this embodiment, the pressure control mechanism 21 is used to control the pressure in the back pressure chamber. However, any control method capable of controlling the pressure can be used. It goes without saying that a similar effect can be obtained.

(Embodiment 3) FIG. 3 is a longitudinal sectional view of a vibrating compressor according to a third embodiment of the present invention.

In FIG. 3, reference numeral 22 denotes an elastic body, which is held so that the position of the cylinder 15 integrated with the cylinder head 7 is substantially at the midpoint between the projections 17a and 17b.

The operation of the vibrating compressor constructed as described above will be described below. First, when the compressor is started, when a large voltage value is suddenly input to the motor 3, the piston 5 collides with the cylinder head 7. Therefore, in order to gradually increase the voltage value applied to the motor 3 at the time of starting, the top clearance volume also gradually decreases until the pressure condition of the system rises to a prescribed value.

However, since the position of the cylinder 15 when stopped by the elastic body 22 is near the top dead center of the piston 5, the elastic body 22 causes the cylinder 15 to move to the top dead center of the piston 5 even when the cylinder 15 is operated with a small stroke at startup. Because it is pressed to the point side, the top clearance volume can be kept small.

Thereafter, when the discharge pressure increases and the stroke increases, the cylinder 5 is also gradually pushed toward the convex portion 17a by the pressure at the time of compression, so that the top clearance volume constantly increases while the specified pressure condition is reached. Since it is possible to prevent such a situation and maintain a constant top clearance volume, the time until the pressure condition of the system rises to a prescribed value can be shortened, so that efficient operation can be achieved.

Next, during stable operation of the compressor, the cylinder 15 tends to vibrate with the vibration of the piston 5, but since the elastic body 22 holds the cylinder 15 so as not to vibrate, the piston 5 And the variation of the top clearance volume caused by the vibration of the cylinder 15 can be prevented, so that a decrease in the refrigerating capacity can be prevented. Further, the position of the cylinder 15 can be stabilized, and generation of vibration and noise can be prevented.

As described above, one end is fixed to the cylinder or the cylinder head, and the other end is provided with the elastic body locked to the fixed element. It is possible to operate with a small volume and to operate efficiently,
Even during normal operation, the cylinder position can be stabilized more than when the cylinder position is controlled only by the gas pressure difference, and the generation of vibration and noise can be prevented.

(Embodiment 4) FIG. 4 is a longitudinal sectional view of a vibrating compressor according to a fourth embodiment of the present invention.

In FIG. 4, reference numeral 23 denotes a piston position detection sensor, and reference numeral 24 denotes a cylinder position detection sensor.

The operation of the vibrating compressor constructed as described above will be described below. When the operating pressure condition of the compressor changes and the stroke amount of the piston 5 increases, the piston 5 is likely to collide with the cylinder head 7.

At this time, by performing feedback control to the pressure control mechanism 21, closing the pressure control valve 21c and opening the pressure control valve 21a, the pressure in the back pressure chamber 18a becomes a low pressure.

On the other hand, the pressure in the back pressure chamber 18b is increased by opening the pressure control valve 21d and closing the pressure control valve 21b.
8b is a high pressure, the back pressure chamber 18a,
The cylinder 15 integrated with the cylinder head 7 moves in the direction of the protrusion 17a due to the pressure difference from the cylinder head 18b.

At this time, since the top clearance increases with the movement of the cylinder 15, it is possible to prevent the piston 5 from colliding with the discharge valve and to prevent noise.

Next, the operating pressure condition changes and the piston 5
Is reduced, the stroke center of the piston 5 moves toward the non-compression chamber 9 side. Then, the piston 5 does not reach the top dead center.

At this time, since the positions of the piston 5 and the cylinder 15 are detected by the position detection sensors 23 and 24,
When detecting that the top clearance has increased,
By closing the pressure control valve 21a and opening the pressure control valve 21c, the pressure in the back pressure chamber 18a becomes a high pressure.

On the other hand, the pressure in the back pressure chamber 18b is increased by opening the pressure control valve 21b and closing the pressure control valve 21d.
Since the pressure inside 8d is a low pressure, the back pressure chamber 18a,
Due to the pressure difference with the cylinder head 18b, the cylinder 15 integrated with the cylinder head 7 moves in the direction of the protrusion 17b.

At this time, since the top clearance decreases with the movement of the cylinder 15, the optimum piston position can always be adjusted with respect to the cylinder position, so that the top clearance can always be minimized, and the refrigerating capacity due to the increase in the top clearance can be reduced. Prevention of drop and efficient operation.

As described above, the vibratory compressor of this embodiment is
Equipped with a cylinder position detection sensor fixed to either the fixed element or the cylinder.Even if the operating pressure condition changes, the piston position can always be adjusted to the optimal piston position, so the top clearance is always maintained. Minimized, efficient operation is possible, and even if the stroke of the piston is increased, it prevents the piston from colliding with the discharge valve in advance, preventing damage and noise caused by the piston colliding with the discharge valve. I do.

In this embodiment, the positions of the piston 5 and the cylinder 15 are detected and the pressure control mechanism 21 is used to control the top clearance to be constant. It goes without saying that the same effect can be obtained in feedback control in which the stroke amount of the piston 5 is adjusted by detecting and adjusting the voltage applied to the motor 3.

(Embodiment 5) FIG. 5 is a longitudinal sectional view of a vibrating compressor according to a fifth embodiment of the present invention.

In FIG. 5, reference numeral 25 denotes a first discharge pipe,
It is connected to the discharge pipe 10 so as to be movable in the axial direction.

The operation of the vibrating compressor configured as described above will be described below. When the piston 5 reciprocates during the operation of the compressor, the compressor vibrates largely in the axial direction. At that time, the vibration is caused by the fixed element 1 of the compressor.
3, the discharge pipe 10 that communicates the cylinder head 7 with the outside of the closed casing 1 tends to vibrate greatly.

However, the first discharge pipe 25 is
Since it is movable in the vibration direction with respect to 0, the vibration by the piston 5 is not transmitted to the discharge pipe 10.

Therefore, since the reciprocating vibration of the piston 5 is not transmitted to the discharge pipe 10, the repetitive stress of the discharge pipe 10 can be reduced, and a decrease in reliability due to breakage of the discharge pipe 10 can be prevented.

As described above, the vibratory compressor of this embodiment is
A motor including a closed casing having a refrigerant gas space, a block housed in the closed casing, a stator and a mover, a piston to which the mover of the motor is connected, a mover and a piston of the motor, etc. , A fixed element composed of a motor stator or a block, an elastic element partially fixed to the movable element, and an elastic element partially fixed to the fixed element, and fixed to the block Or a cylinder movable in the axial direction, a cylinder head fixed to the cylinder, one end movably held by the discharge pipe or the suction pipe, and the other end fixed to either the cylinder or the cylinder head, and Equipped with a first discharge pipe or a first suction pipe that can move in the axial direction, so that the discharge pipe or the suction pipe can move in the axial direction even if the vibration in the axial direction is large. Some reason, damaged thereby preventing the discharge pipe or stress due to repetitive amplitude of the suction pipe can be reduced discharge pipe or the suction pipe, even if the cylinder has moved can prevent damage to the discharge tube according to the movement.

In this embodiment, the first discharge pipe 25 is movable in the axial direction. However, it goes without saying that the same effect can be obtained by applying the same configuration to the suction pipe 20.

[0082]

As described above, the motor including the closed casing having the refrigerant gas space, the block housed in the closed casing, the stator and the mover,
The piston to which the mover of the motor is connected, the movable element constituted by the mover and the piston of the motor, the fixed element constituted by the stator and the block of the motor, etc., are partially fixed to the movable element, Equipped with an elastic element partially fixed to the fixed element, a cylinder that can move in the axial direction with respect to the block, and a drive element that moves the cylinder in the axial direction. It is possible to minimize it, and it is possible to always perform efficient operation.

Further, a motor comprising a closed casing having a refrigerant gas space, a block housed in the closed casing, a stator and a mover, a piston to which the mover of the motor is connected, and a motor A movable element configured by a mover or a piston, a fixed element configured by a stator or a block of a motor, and an elastic element partially fixed to the movable element and partially fixed to the fixed element, A cylinder movable with respect to the block, a cylinder head fixed to the cylinder, and at least two cylinders in the refrigerant gas space in the closed casing with a cylinder or a cylinder head or a cylinder member integrated with the cylinder and the cylinder head as boundaries. A back pressure chamber formed by division, at least one of the back pressure chambers is set to a low pressure, and at least one other chamber is set to a low pressure. It is equipped with a high pressure to a high pressure, and at a high outdoor temperature where a large amount of refrigeration capacity is required in a refrigerator such as an actual refrigerator, the long stroke is automatically adjusted so that the refrigeration capacity is not insufficient, At the time of outside temperature, the stroke can be automatically adjusted to a low stroke, and efficient operation can be performed according to the operating conditions without using another detecting means or control means.

Further, an elastic body having one end locked to a cylinder or a cylinder head and the other end locked to a fixed element is provided, so that the top clearance volume can be reduced even in a small stroke operation at the time of starting. The operation can be suppressed and the operation can be performed efficiently, and even during the normal operation, the cylinder position can be stabilized more than when the cylinder position is controlled only by the gas pressure difference, and the generation of vibration and noise can be prevented.

Further, since a cylinder position detecting sensor fixed to either the fixed element or the cylinder is provided, the piston position can always be adjusted to the optimum position with respect to the cylinder position even when the operating pressure condition changes. In addition, the top clearance can always be minimized, efficient operation can be performed, and even if the stroke amount of the piston increases, the piston can be prevented from colliding with the discharge valve in advance, and the piston can collide with the discharge valve. Prevent damage and noise.

A motor including a closed casing having a refrigerant gas space, a block housed in the closed casing, a stator and a mover, a piston to which the mover of the motor is connected, and a motor A movable element configured by a mover or a piston, a fixed element configured by a stator or a block of a motor, and an elastic element partially fixed to the movable element and partially fixed to the fixed element, A cylinder fixed or axially movable with respect to the block, a cylinder head fixed to the cylinder, and one end movably held by a discharge pipe or a suction pipe,
The other end is fixed to either the cylinder or the cylinder head, and has a first discharge pipe or a first suction pipe movable in the axial direction. Even if the vibration in the axial direction is large, the discharge pipe or the suction Since the pipe can be moved in the axial direction, stress due to the repetitive amplitude of the discharge pipe or suction pipe can be reduced, preventing breakage of the discharge pipe or suction pipe, and also preventing damage to the discharge pipe due to movement when the cylinder moves. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a vibration compressor according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a vibration compressor according to a second embodiment of the present invention.

FIG. 3 is a longitudinal sectional view of a vibrating compressor according to a third embodiment of the present invention.

FIG. 4 is a longitudinal sectional view of a vibrating compressor according to a fourth embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of a vibration compressor according to a fifth embodiment of the present invention.

FIG. 6 is a longitudinal sectional view of a conventional vibrating compressor.

[Explanation of symbols]

 1a Refrigerant gas space 1 Closed casing 3 Motor 3a Stator 3b Mover 5 Piston 6 Block 8 Elastic element 12 Movable element 13 Fixed element 15 Cylinder 16 Drive element 18a, 18b Back pressure chamber 22 Elastic body 24 Cylinder position detection sensor 25 First Discharge pipe

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kou Inagaki 4-5-2-5 Takaidahondori, Higashiosaka-shi, Osaka Matsushita Refrigeration Co., Ltd.

Claims (5)

[Claims] A motor comprising a closed casing having a refrigerant gas space, a block housed in the closed casing, a stator and a mover, a piston connected to a mover of the motor, A movable element configured by the mover or the piston of the motor, a fixed element configured by the stator or the block of the motor, and a part is fixed to the movable element,
A vibrating compressor including an elastic element partially fixed to the fixed element, a cylinder movable in the axial direction with respect to the block, and a drive element moving the cylinder in the axial direction. 2. A motor comprising a closed casing having a refrigerant gas space, a block housed in the closed casing, a stator and a mover, and a piston to which a mover of the motor is connected. A movable element configured by the mover or the piston of the motor, a fixed element configured by the stator or the block of the motor, and a part is fixed to the movable element,
An elastic element partially fixed to the fixed element, a cylinder movable with respect to the block, a cylinder head fixed to the cylinder, and the cylinder or the cylinder in a refrigerant gas space in the closed casing. A back pressure chamber formed at least in two parts with a head or the cylinder and a cylinder member integrated with the cylinder head as a boundary, at least one of the back pressure chambers at a low pressure, and at least one other chamber Vibration compressor that changes from low pressure to high pressure. 3. The vibration type compressor according to claim 2, further comprising an elastic body having one end locked to the cylinder or the cylinder head and the other end locked to a fixed element. 4. The vibratory compressor according to claim 1, further comprising a cylinder position detection sensor fixed to one of the fixed element and the cylinder. 5. A motor including a closed casing having a refrigerant gas space, a block housed in the closed casing, a stator and a mover, and a piston to which a mover of the motor is connected. A movable element configured by the mover or the piston of the motor, a fixed element configured by the stator or the block of the motor, and a part is fixed to the movable element,
An elastic element partially fixed to the fixed element, a cylinder fixed or axially movable with respect to the block, a cylinder head fixed to the cylinder, and one end movable to a discharge pipe or a suction pipe 5. A first discharge pipe or a first suction pipe, the other end of which is fixed to one of the cylinder and the cylinder head and is movable in the axial direction. The vibratory compressor as described.