DE2352449A1 - Performance booster for gas or vapour compressor - has spring loaded pushrod actuated valve between inlet and collector chamber - Google Patents

Abstract

Performance booster system is e.g. used in compressors for refrigerating systems. The control system used for the performance of the compressor prevents excessively low inlet pressure. The control system has a valve actuated by a pushrod and this valve is used to separate the inlet channel from the collector chamber or to connect this channel with the collector chamber. A channel is provided in the valve for equalising pressure to that of the collector pressure. A spring preloads the pushrod to keep the valve closed, and solenoid is used to actuate the pushrod against the spring load into open position.

Description

3. DR. IUR. DtPL-INS.

VOLKER BUSSE DiETRSCH BUSSE

45 osnabrock, den yl, october 1973

MOSERSTBASSE 2O / 24 VB / Fi

PKESTCOLD 1, THITED .
Theal e, Hr Reading, B e rk sh i re., En gl an d

Device for power control of Gas or steam compressors

The invention relates to a control device for the performance of gas or vapor compressors «Such Controls are used to change the performance Compressor used to create unduly low inlet pressures to prevent, with a Kcmpressions-Kühlkroisanlage must the compressor power typically - with the cooling power be reduced. In addition, it xst when hiring a Compressor desired, the cylinders until after start-up to relieve.

According to the invention, a gas or vapor compressor with an inlet channel for supplying gas or steam to be compressed to an inlet header of the compressor and a capacity or power control is provided, which is characterized by

a) a push rod,

b) a valve that passes through the push rod between a first position in which the inlet port of the collector

609818/0987 BAD

isolated b3v. ^r . is separated, and a second position, in which the inlet channel is in communication with the Sr-.Tsmler, can be extended,

c) a Kar;?!, which dia-eh dar. Valve extends through and by means of which Me-dJuinöruok des S arm le rs to te.id.on pages öes Valve reaches four den can,

d) an elastic Or ^ an for bracing the push rod in the direction of the Vent.ilκ and closing of the channel by the push rod and then biasing the valve into the first by the push rod; Position and

e) a Ein or Rückzxc-heiineinrichtung, which in its first Position of the valve to retract the push rod contrary to the pretensioning effect of the elastic organ from the the channel closing position and for the subsequent displacement of the valve from the first to the second position is actuatable.

An embodiment of a compressor embodying the invention is explained in more detail in the following description in conjunction with the drawing, in the Pig. I and 2 respectively Sectional views of a Kompreascrleistungssteueruixg with in different Show positions located parts.

A valve plate 11 of a freezing or cooling compressor is provided with a suction eye in laß 12, which feeds an inlet duct I ¹ J in a cylinder head 15. A collector or distributor 16 takes medium to be compressed from the inlet channel. 14 through an opening 17. The medium to be compressed flows over from the collector 16

BATH ORIGINAL 50 9 818/0987

a suction port 18 and inlet valves of known type in the Compressor cylinder. ■

The medium flow from the inlet channel Ik to the collector 15 is controlled by a valve 19 through which a channel 20 and a small opening 20a extend. The valve 19 with seal 19a is in a bore 21 between a first position shown in Fig. 1, in which the Einlaßkansl Ik is blocked from the collector 16, and a second position shown in Fig. 2, in which the inlet channel Ik is in communication with the collector 1.6 via the opening 17, displaceably. ·

A compression spring 23 presses a push rod 2k against the valve 19 so that the push rod 2k closes the channel 20. If there is no medium pressure difference at the valve 19, the compression spring 23 presses the push rod 2k and the valve 19 into a first position, shown in FIG. 1, which closes the opening 17.

A solenoid coil 27 with ends connected to the terminals 28, 29 is attached around a sealed tube 26 in which the push rod 2k is slidably held. In supplying Steuersp.anaung via the terminals 28, 29 of the solenoid is energized _t to the push rod 2k against the action of spring 2 '} collect in aas housing. When entering, a disk comes into engagement with a snap ring 31 in order to forcibly withdraw the valve 19 from the opening 1.7. \ -. . ■ '

5 0 9 818/0987 _BAD original

_ if _.

In operation C-cs with the compressor working at full or almost full load, the solenoid? 7 is excited via the connections 28, 29 in order to counteractively hold the push rod 2 ¹ I dor spring 23 firmly in its retracted position Einlößkanal 1 * 1 flow freely through the opening 17 and the Sarrnler 16 to the suction opening jö.

When the load is to be reduced; or power of the compressor, the solenoid valve is de-energized (typically by the action of a pressure-sensitive transducer), and the spring 23 causes the valve 19 to be pushed back by means of the push rod 24 to close the opening 17. As a result, during further operation of the compressor creates a partial vacuum in the collector 16 and thus created a pressure difference at the valve 19, which causes the opening 17 to remain closed. The solenoid 27 is energized to increase the compressor output. The initial movement of the push rod 2k (and the disc 30) opens the valve 20 and, in combination with the small opening 20a, enables the medium pressure to be equalized on both sides of the valve 19. Another retraction through the push rod 2 ^! i causes the disc 30 and the snap ring 31 to engage and the valve 19 to be withdrawn from the opening 17.

503818/098 7

Claims (3)

Patent claims: Gas or vapor compressor with an outlet channel for supplying gas or Dar.pf to be compressed to an inlet / chamber of the compressor and a capacity or power flow, characterized by a) a push rod (2 ^) ₅ b) a valve (19) ₃ dps through the push rod (2 * 0 between a first position, in which the inlet channel (1 * 0 is isolated or separated from the; Spmm ^ er (16), and "a second position, in which the inlet duct (1 * 0 is connected to the collector (16), can be moved, c) a channel (20) which bindurcher-stretches through the valve (19) and by means of its median pressure of the collector to both Sides of the valve (19) can be reached, d) an elastic member (23) for pretensioning the push rod (2 * 1) in the direction of the valve (19) and the channel (20) is closed by the push rod (2 * 4) and then pretensioned, Valve (19) through the push rod in the first position and e) · a retraction or retraction device (27), which in its first Position of the valve (19) to retract the push rod (2 * 0 against the pretensioning effect of the elastic 0r £ anb (23) from the position closing the channel (20) and for the subsequent displacement of the valve (19) from the first into the second position can be actuated. 2. Compressor according to Ansprveh i, characterized in that the elastic organ from one between the valve body (19) and 509818/0987 BAD ORlSiNAL a Flar.Right part (30) of the push rod acting compression spring (23) looks at " 3. Compressor according to claim 1 or?, Characterized in that the input or ;. R'lc] - ^r ', i (? H ^r inrichti) r: g consists of o3nom orreeba ^ -en solenoid (27). ^L \ . Compressor according to £ no> pruch 3 _a characterized in that darj Soüonoid (27) anr-pr ^ -chemd on the output signal ei no η an other studs arranged in the dom compressor pressure-sensitive Unwandlers eregbf:! - is. BAD ORfQINAL 5 (3 9 8 1 8 / Ö 9 8 7