# US 11,441,552 B2 · Reciprocating piston machine with cooling device

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- Number: US 11,441,552 B2
- Document ID: US11441552B2
- Status: Granted
- Kind: B2
- Application number: 16/632,586
- Filed: 2018-06-07
- Published: 2020-07-30
- Granted: 2022-09-13
- Earliest claimed: 2017-07-21
- Assignees: Voith Patent GmbH
- Applicants: Voith Patent GmbH
- Inventors: Marius Burkauskas
- Web page: https://patentgrep.com/patent/US11441552B2

## CPC

- F04B 39/06: Cooling; Heating; Prevention of freezing
- F04B 39/064: {Cooling by a cooling jacket in the pump casing}
- F04B 39/08: Actuation of distribution members
- F04B 39/1073: {the members being reed valves}
- F04B 39/121: {Casings}
- F04B 39/122: {Cylinder block}
- F04B 39/123: {Fluid connections}
- F04B 39/125: {Cylinder heads}
- F04B 53/007: {Cylinder heads}
- F04B 53/08: Cooling; Heating; Preventing freezing
- F16K 15/1821: {for check valves with a hinged or pivoted closure member}
- F16K 15/1825: {for check valves with flexible valve members}
- F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F)
- F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)}

## Abstract

A reciprocating piston machine for compressing a fluid, more particularly ambient air, for a compressed air system of a motor vehicle, includes a cylinder housing and a cylinder head constructed layer by layer and including a valve carrier element with an outlet valve, a chamber plate and a head plate with a pressure medium outlet. A cooling medium channel for cooling at least a partial region of the cylinder head and an outlet channel for connecting the outlet valve to the pressure medium outlet are provided and extend through components of the cylinder head, at least in portions. In order to improve the cooling, at least a partial portion of the cooling medium channel and a partial portion of the outlet channel are allocated to the cylinder housing.

## Claims

### Claim 1

A reciprocating piston machine for compressing a fluid or ambient air for a compressed air system of a motor vehicle, the reciprocating piston machine comprising:
a cylinder housing; and
a cylinder head constructed in layers with outlet channel planes and cooling planes forming a first heat exchanger region, said cooling planes and said outlet channel planes being disposed in alternate layers, said cylinder head including a valve carrier element with an outlet valve, a chamber plate and a head plate with a pressure medium outlet;
a cooling medium channel for cooling at least a partial region of said cylinder head and an outlet channel for connecting said outlet valve to said pressure medium outlet, said cooling medium channel and said outlet channel extending at least in portions through components of said cylinder head, said cooling planes and said outlet channel planes including at least one channel extending along said plane and being a partial portion of said cooling medium channel or of said outlet channel to form said cooling plane or said outlet channel plane respectively;
said partial portions of said cooling medium channel or of said outlet channel being connected together by connecting channels formed in said layers;
at least a partial portion of said cooling medium channel and a partial portion of said outlet channel being associated with said cylinder housing; and
a second heat exchanger region provided in said cylinder housing, at least a partial portion of said cooling medium channel and a partial portion of said outlet channel running through said second heat exchanger region.

### Claim 2 (depends on 1)

The reciprocating piston machine according to claim 1, which further comprises a compressor stage with a reciprocating piston.

### Claim 3 (depends on 1)

The reciprocating piston machine according to claim 1, wherein said cooling medium channel has connections disposed in said cylinder head.

### Claim 4 (depends on 1)

The reciprocating piston machine according to claim 1, wherein said second heat exchanger region positioned in said cylinder housing causes at least a partial portion of said cooling medium channel and at least a partial portion of said outlet channel to be formed by said cylinder housing and a valve carrier plate.

### Claim 5 (depends on 1)

The reciprocating piston machine according to claim 1, which further comprises four planes provided in said cylinder head, each of said planes containing at least one of the channel being a partial portion of said cooling medium channel or of said outlet channel to form the cooling plane or the outlet channel plane.

### Claim 6 (depends on 1)

The reciprocating piston machine according to claim 1, wherein at least a partial portion of said outlet channel is delimited by said head plate and a separating plate.

### Claim 7 (depends on 1)

The reciprocating piston machine according to claim 1, wherein at least a partial portion of said cooling medium channel is delimited by a separating plate and said chamber plate.

### Claim 8 (depends on 1)

The reciprocating piston machine according to claim 1, wherein at least a partial portion of said outlet channel is delimited by said valve carrier element and said chamber plate.

### Claim 9 (depends on 1)

The reciprocating piston machine according to claim 1, wherein at least a partial portion of said cooling medium channel is delimited by said valve carrier plate and a valve intermediate plate.

### Claim 10 (depends on 1)

The reciprocating piston machine according to claim 1, wherein an inlet space in said cylinder head has a length which extends over all of said components in said layers and is separated from a cylinder space in said cylinder housing by a reed valve.

### Claim 11 (depends on 10)

The reciprocating piston machine according to claim 10, which further comprises a valve tappet disposed in said cylinder head for lifting said reed valve away from a valve carrier plate to interconnect said inlet space and said cylinder space.

### Claim 12 (depends on 11)

The reciprocating piston machine according to claim 11, wherein said valve tappet is movable into a first position by spring force and is movable into a second position for opening said reed valve by a pressure medium from a control air connection.