JP6609264B2 - Reciprocating compressor provided with suction valve configuration - Google Patents

Description

  The present invention relates to a reciprocating compressor capable of operating with two separate pressure suction lines provided with a suction valve configuration, and more particularly, for suction valves of different suction valve thicknesses. Concerning configuration.

  According to the invention, the configuration of the suction valve preferably comprises at least two vane type suction valves, which are arranged on a common valve plate, each said suction valve being of a certain thickness, in particular a suction Dedicated to the valve drive principle.

  As is known to those skilled in the art, the current state of the art provides various embodiments of cooling systems. In addition to the simplest embodiment (usually equipped with only one compressor, one condenser, one expansion device, and one evaporator), several more complex embodiments are also provided. ing. These complex embodiments may relate to multiple evaporator concepts.

  Usually, a cooling system consisting of a plurality of evaporators is provided with lines, the evaporators are thus interdependent between each other, and a cooling system consisting of a plurality of evaporators as a whole evaporates independently of each other. Equipped with a bowl.

  According to the present invention, it relates only to a cooling system consisting of a plurality of evaporators with evaporators that are mutually independent as a whole, more specifically, a single reciprocating compressor (scroll compressor or rotary piston). The present invention relates to a cooling system provided with a different type of compressor. An example of this type of cooling system is described in detail in the document Brazil Patent Publication No. 1001359.

  According to this document, the current state of the art consists of a single reciprocating compressor, a single condenser, two expansion elements, and two evaporators, each of which is dedicated. A cooling system (applied to cooling compartments and cooling devices incorporated by freezers) that is fluidly connected to the compressor through a suction line is included. It is noteworthy that each suction line can operate at a specified pressure to form a high pressure line and a low pressure line. In this case, the compressor comprises two suction inlets (one for each suction line), each of which has a suction vane type valve suction.

  One suction valve (especially the suction valve connected to the low-pressure suction line) comprises a single vane valve that moves in response to the force applied by the suction and discharge flows, ie automatic type It has a valve.

  The other suction valve (especially the suction valve connected to the high-pressure suction line) is equipped with a vane-type semi-automatic valve (or semi-command type), which is a valve plate (a plate placed at one end of the compression cylinder) The purpose of this plate is to form a suction inlet and a discharge inlet and serve as a support base for the suction and discharge valves) by means of interacting in cooperation with a solenoid, and If the solenoid is not actuated, it is also directed from a remote location by the forces provided by the suction and exhaust flows.

  In the cooling system described in document FR 1001359, the two or more suction valves operate in an alternating manner, i.e. while one of the valves is operating, the other It is noteworthy that the valve (ultimately only the second valve) is left inactive.

  More particularly, it is noteworthy that the cooperative operation of the solenoid is exclusively for valves operating on the high pressure suction line. This allows the suction valve of the low pressure suction line to be actuated when the solenoid is actuated (the suction valve position of the high pressure line is locked so that the suction valve remains closed). When the solenoid is not activated (the pressure difference is responsible for maintaining the lock of the suction valve of the low pressure line), the suction valve of the high pressure line can be activated.

  Further, as described in the document Brazil Patent Application Publication No. 1001359, both the vane-type semi-command type suction valve and the vane-type semi-command type discharge valve are disclosed in the document Brazil The fact that the use of a solenoid is provided by the published application 1105379 is also highlighted. At least one solenoid used in the present invention and described in the document Brazil Patent Application No. 1105379 is located on the valve plate, as in document Brazil Patent Application Publication No. 1001359. ing.

  In both cases (literature Brazilian Patent Application Publication No. 1001359 and document Brazilian Patent Application Publication No. 1105379), the solenoid located on the valve plate is one electrical conductor winding (electrical winding) Coil) and a mechanical assembly comprising a support structure (known as a “cup”, depending on the main configuration) that forms a kind of support pipe for electrical conductor windings. The pipe is aligned perpendicular to the central orifice (suction and discharge) and a semi-command valve is activated.

  As is known to those skilled in the art, the semi-command vane valve “locks” due to the suction force generated by the actuation of the solenoid. This type of reaction is explained by electromagnetic attraction between these components.

  In this context, it is also well known that the semi-command type (vane type) valve thickness is a characteristic that plays an important role in the design of the configuration of a suction valve for a reciprocating compressor. .

  That is, it is known that as the vane type valve becomes thicker, the required suction force generated by the solenoid is reduced, and therefore the power used by the solenoid to lock the valve is reduced. This is due to the saturation of the magnetic flux through the valve.

  Literature Returning to Brazil Patent Application No. 1001359, based on the actual embodiment provided by the content of this document, two suction valves (automatic and semi-command type) are usually of uniform thickness. It can be seen that the same metal foil is formed.

  Although this type of embodiment is common and common, the uniform thickness of this suction valve (formed on a single metal foil) optimizes the operation of one of the two valves. It becomes difficult to ignore the fact that there is no.

  If the foil with the two valves set has a thickness that optimizes the operation of the semi-command valve (if it is thicker), then the automatic valve operation can be compromised and eventually a greater hindrance to the compression pressure As a result, the valve operation “point” is changed. If the foil with two valves has a thickness that optimizes the operation of the automatic valve (thinner), the operation of the semi-command solenoid and valve assembly is hindered, resulting in a greater suction force This eventually increases the power consumption of the solenoid.

  It is therefore clear that this technical aspect requires improvement. The basis for the present invention is based on the scenario detailed above.

Brazil Patent Application Publication No. 1001359 Specification Brazilian Patent Application Publication No. 1105379

  Thus, the main object of the present invention comprises at least one automatic valve and at least one semi-command valve, both automatic and semi-command valves in particular having a specific type of operation. It is intended to show a reciprocating compressor provided with a suction valve configuration.

  Therefore, it is an object of the present invention that the suction valve configuration is also provided with a low power consumption solenoid, and this consumption is not physically related to each other so that the suction valve can have different thicknesses. It can be beneficially influenced by the structural characteristics of the suction valve.

  These and other objects of the invention disclosed herein are fully achieved by a reciprocating compressor provided with a suction valve arrangement.

  Generally, the compressor comprises, among other basic components, at least one compression cylinder, at least one valve plate disposed at one end of the compression cylinder, and typically at least one vane-type suction valve. At least one vane-type semi-command type suction valve and at least one suction valve configuration comprising at least one solenoid with one electrical conductor winding and at least one support structure. Yes. Both suction valves have at least one movable part capable of interacting with at least one suction orifice.

  The movable part of the automatic suction valve moves according to the strength of the cooling fluid flow of the reciprocating compressor, and the movable part of the semi-command type suction valve reciprocates according to the suction force generated by the solenoid. The compressor moves according to the strength of the cooling fluid flow.

  Furthermore, according to the present invention, the thickness of at least a half-command type suction valve is greater than the thickness of at least one automatic suction valve.

  The invention will be described in detail with reference to FIG.

FIG. 1 is an exploded view showing a preferred embodiment of the configuration of a suction valve for a reciprocating compressor according to the present invention.

  In general, the main object of the present invention is to provide an excellent means for reducing the power consumption of the solenoid responsible for the performance of the semi-command type intake valve described in the document Brazil No. 1001359. It is.

  Accordingly, there are described a double suction reciprocating compressor and a reciprocating compressor described in the patent application publication No. 1001359 of the document Brazil, in which the configuration of the suction valve is significantly different from the current state of the present technology.

  For reference purposes, the double suction reciprocating compressor capable of operating with two separate pressure suction lines comprises a compression cylinder 1 and a valve plate disposed at one end of the compression cylinder 1. 2 and other common components (not shown) that are necessarily built into this type of compressor, such as a drive source capable of moving a movable piston disposed in the compression cylinder 1; It is worth noting that it has a compression mechanism with. Obviously, conventional reciprocating compressor aspects do not fall within the scope of the present invention.

  In particular, the reciprocating compressor further comprises a suction valve arrangement comprising at least two vane type suction valves and at least one solenoid capable of applying magnetic suction to one of the suction valves. ing.

  In more detail, and as previously defined in the document Brazil Patent Publication No. 1001359, one of the suction valves is an automatic vane type suction valve 3, mainly located on the valve plate 2 Each has a movable part capable of interacting with each suction orifice. As mentioned above, such valves are defined as “automatic suction valves”, and the movement of the free ends of these valves relative to the respective orifices is effected only by the forces generated by the cooling fluid suction and discharge flows.

  Furthermore, and according to what has already been indicated in the document FR 1001359 of the document Brazil, one of the suction valves can interact with the respective suction orifices located in particular on the valve plate 2. It is a vane-type semi-command type suction valve 4 with a movable part that is possible. As described above, such valves are defined as “semi-command type suction valves”, and the movement of the free ends of these valves relative to the respective orifices depends on the magnetic force (suction force) generated by the operation of the solenoid and the suction of the cooling flow. This is due to both the flow and the forces generated by the discharge flow.

  The solenoid 5 belonging to the configuration of the suction valve can be fastened to the electrical conductor winding and the valve plate 2, more particularly in a manner aligned with the semi-command type suction valve 4 in particular. A conventional solenoid with a support structure capable of being secured.

  In this connection, it should be noted that it is not the object of the present invention to detail the possible dimensions of the automatic suction valve 3, the semi-command suction valve 4, or even the solenoid 5. Deserve.

  Furthermore, it is not the object of the present invention to elaborate on possible anchoring means for these components of the reciprocating compressor suction valve configuration. Nevertheless, anchoring means known to those skilled in the art can be used.

  In fact, the main point of the present invention relates to the fact that the thickness of the semi-command type suction valve 4 is larger than the thickness of the automatic type suction valve 3.

  More specifically, it is still clear that the ratio between the thickness of the semi-command type suction valve 4 and the thickness of the automatic type suction valve 3 is between 1.1: 1 and 3: 1.

  Two important results are reached when the thickness of the semi-command type suction valve 4 is increased relative to the automatic type suction valve 3.

  The power consumption of the solenoid 5 decreases, and eventually, the greater the mass of the attracted body metal, the smaller the magnetic stress produced by the solenoid, and thus the smaller the power supply.

  The reliability of the sealing, after all, in a situation where the semi-command suction valve 4 needs to be “closed” (by actuating the solenoid 5), the functional state that ensures the proper functioning of the automatic suction valve 3 Increases mechanical resistance to change.

  On the other hand, if the thickness of the automatic suction valve 3 is further reduced with respect to the semi-command type suction valve 4, (as compared to the amount of material used for two suction valves of the same thickness) This leads to material savings.

  With regard to the assemblability of the suction valve configuration disclosed herein, the best possible means to obtain two suction valves of different thickness is to manufacture the valve so that the valves are physically independent of each other. It is clear that

  Therefore, it is preferred that the thinner automatic suction valve 3 is formed on a larger metal foil with possible means for more stable anchoring, while the thicker semi-command type suction valve 4 is exclusively It is preferably provided with possible means for a more restrictive fixation.

  An example of a good configuration is best shown in FIG. In FIG. 1, an automatic suction valve 3 is formed in a foil having an outer periphery equal to the outer periphery of the valve plate 2, and both the automatic suction valve 3 and the valve plate 2 are relative to each other and of the reciprocating compressor. It can be securely fixed to the compression cylinder 1. It can also be seen that the foil in which the automatic suction 3 is formed provides a pass-by, or window, containing a passage area for the semi-command suction valve 4, the semi-command suction valve 4 being a valve plate Alternatively, it can be attached directly to the foil in which the automatic suction 3 is formed.

  Although the core of the present invention has been described as an example of a preferred embodiment, the scope of protection of a “reciprocating compressor provided with a suction valve configuration” is limited only by the content of the claims. It is important to embrace possible variations and emphasize that the claims include possible equivalent constructions.

Claims (3)

A reciprocating compressor provided with a configuration of a suction valve,
At least one compression cylinder (1), at least one valve plate (2) arranged at one end of the compression cylinder (1), and at least one movable capable of interacting with at least one suction orifice At least one vane type semi-suction valve with at least one vane type automatic suction valve (3) having a portion and at least one movable part capable of interacting with at least one suction orifice (4) and at least one suction valve configuration comprising at least one solenoid (5) with at least one electrical conductor winding and at least one support structure;
With
The movable part of the automatic suction valve (3) moves according to the strength of the cooling fluid flow of the reciprocating compressor,
The movable part of the semi-command type suction valve (4) moves according to the suction force generated by the solenoid (5) and according to the strength of the flow of cooling fluid in the reciprocating compressor;
In particular, the thickness of at least one semi-command type suction valve (4) is greater than the thickness of at least one automatic type suction valve (3);
At least one automatic suction valve (3) and at least one semi-command suction valve (4) are formed on different metal foils;
Reciprocating compressor with suction valve configuration, wherein the metal foil in which at least one automatic suction valve (3) is formed provides a window with a passage area for the semi-command suction valve (4) .   2. The ratio between the thickness of the semi-command type suction valve (4) and the thickness of the automatic type suction valve (3) is between 1.1: 1 and 3: 1. The reciprocating compressor provided with the structure of the suction valve of description.   2. The suction valve arrangement according to claim 1, characterized in that the automatic suction valve (3) and the semi-command suction valve (4) comprise physically independent components. Reciprocating compressor.

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