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US-20260126041-A1 - SCROLL COMPRESSOR AND HEAT PUMP DEVICE

US20260126041A1US 20260126041 A1US20260126041 A1US 20260126041A1US-20260126041-A1

Abstract

A scroll compressor includes a movable scroll and a static scroll. The static scroll having a base plate and a scroll wall provided on the base plate. A housing is arranged on a side of the base plate facing away from the scroll wall. The housing has a first cavity with a first opening on a bottom surface of the housing facing the base plate, the first opening being covered by the base plate to form a gas-injection chamber. The gas-injection chamber being connected via a gas-injection hole on the base plate to a compression chamber corresponding to an intermediate pressure stage formed by the movable scroll and the static scroll. The first cavity being connected to a gas-injection port of the scroll compressor, and a non-return valve device in the first cavity for one-way flow from the gas-injection port to the gas-injection chamber.

Inventors

  • Haixiang Wang

Assignees

  • ROBERT BOSCH GMBH

Dates

Publication Date
20260507
Application Date
20251031
Priority Date
20241101

Claims (10)

  1. 1 . A scroll compressor, the scroll compressor ( 96 ) comprising: a movable scroll ( 35 ); a static scroll ( 1 ), the static scroll ( 1 ) having a base plate ( 10 ) and a scroll wall ( 11 ) disposed on the base plate ( 10 ); and a housing ( 2 ) arranged on a side of the base plate ( 10 ) facing away from the scroll wall ( 11 ); wherein, the housing ( 2 ) has a first cavity ( 22 ), the first cavity ( 22 ) having a first opening ( 220 ) on a bottom surface ( 24 ) of the housing ( 2 ) facing the base plate ( 10 ), the first opening ( 220 ) being covered by the base plate ( 10 ) to form a gas-injection chamber ( 30 ), the gas-injection chamber ( 30 ) being connected via a gas-injection hole ( 13 ) on the base plate ( 10 ) to a compression chamber ( 33 ) corresponding to an intermediate pressure stage formed by the movable scroll ( 35 ) and the static scroll ( 1 ), the first cavity ( 22 ) being connected to a gas-injection port ( 26 ) of the scroll compressor ( 96 ), and a non-return valve device ( 7 ) for one-way flow from the gas-injection port ( 26 ) to the gas-injection chamber ( 30 ) being provided in the first cavity ( 22 ).
  2. 2 . The scroll compressor according to claim 1 , wherein the housing ( 2 ) has a second cavity ( 23 ), the second cavity ( 23 ) having a second opening ( 230 ) on the bottom surface ( 24 ) of the housing ( 2 ) facing the base plate ( 10 ), the second opening ( 230 ) being covered by the base plate ( 10 ) to form a discharge chamber ( 31 ), the discharge chamber ( 31 ) being connected via a discharge hole ( 14 ) on the base plate ( 10 ) to a compression chamber ( 34 ) corresponding to a highest pressure stage formed by the movable scroll ( 35 ) and the static scroll ( 1 ), the discharge chamber ( 31 ) being connected to the discharge port ( 28 ) of the scroll compressor.
  3. 3 . The scroll compressor according to claim 2 , wherein the scroll compressor ( 96 ) comprises at least one of the following features: the housing has an inner cavity ( 20 ) and a separating wall ( 21 ), the separating wall ( 21 ) spanning the inner cavity ( 20 ) to separate it into the first cavity ( 22 ) and the second cavity ( 23 ), the scroll compressor ( 96 ) comprises at least an integral seal ( 5 ) disposed at least partially between the housing ( 2 ) and the base plate ( 10 ), the gas-injection chamber ( 30 ) and the discharge chamber ( 31 ) sharing the seal ( 5 ).
  4. 4 . The scroll compressor according to claim 3 , wherein the separating wall ( 21 ) has a convex shape ( 60 ) that protrudes toward the first cavity ( 22 ) in a projection along an axial direction ( 32 ) of the scroll compressor ( 96 ); in a projection along the axial direction ( 32 ) of the scroll compressor ( 96 ), the first cavity ( 22 ) comprises a small chamber ( 222 ) and a large chamber ( 223 ) on both sides of the convex shape ( 60 ) and a connecting channel ( 224 ) formed at a top ( 600 ) of the convex shape ( 60 ), the small chamber ( 222 ) and the large chamber ( 223 ) being connected to each other via the connecting channel ( 224 ), the non-return valve device ( 7 ) being arranged within the large chamber ( 223 ), and the small chamber ( 222 ) and the large chamber ( 223 ) being each connected to a gas-injection hole ( 13 ) on the base plate ( 10 ); the housing ( 2 ) has a discharge pipe ( 280 ) connected to the discharge port ( 28 ), the discharge chamber ( 31 ) being connected to the discharge pipe ( 280 ) via a through-hole ( 281 ) on the discharge pipe ( 280 ), in a projection along the axial direction ( 32 ) of the scroll compressor ( 96 ), the through-hole ( 281 ) is adjacent to the top ( 600 ) of the convex shape ( 60 ); in a projection along the axial direction ( 32 ) of the scroll compressor ( 96 ), the separating wall ( 21 ) has two shoulders ( 61 ) positioned on both sides of the convex shape ( 60 ), the convex shape ( 60 ) being connected to a side wall ( 200 ) of the inner cavity ( 20 ) via the two shoulders ( 61 ), each of the gas-injection holes ( 13 ) being adjacent to a transition portion ( 62 ) between the convex shape ( 60 ) and each shoulder ( 61 ).
  5. 5 . The scroll compressor according to claim 3 , wherein the seal ( 5 ) comprises an annular sealing portion ( 51 ) and a separating sealing portion ( 50 ) connected to the annular sealing portion ( 51 ), in a projection along the axial direction ( 32 ) of the scroll compressor ( 96 ), the annular sealing portion ( 51 ) surrounds the inner cavity ( 20 ) and the separating sealing portion ( 50 ) is adapted to be disposed between the separating wall ( 21 ) and the base plate ( 10 ) to seal the gas-injection chamber ( 30 ) and the discharge chamber ( 31 ) relative to each other.
  6. 6 . The scroll compressor according to claim 5 , wherein the scroll compressor ( 96 ) comprises at least one of the following features: the separating sealing portion ( 50 ) has a protruding segment ( 63 ) that protrudes toward the first cavity ( 22 ); the seal ( 5 ) comprises an outer ring portion ( 52 ) surrounding the annular sealing portion ( 51 ) and a connecting portion ( 53 ) connecting the annular sealing portion ( 51 ) with the outer ring portion ( 52 ).
  7. 7 . The scroll compressor according to claim 5 , wherein the scroll compressor ( 96 ) comprises at least one of the following features: in cross section, the separating sealing portion ( 50 ) comprises a central arched portion ( 54 ) and supporting portions ( 55 ) on both sides of the arched portion ( 54 ), thereby forming an elastomeric structure; along the axial direction ( 32 ) of the scroll compressor ( 96 ), the separating sealing portion comprises a metal layer ( 56 ) in a middle and elastomer layers ( 57 ) on both sides of the metal layer ( 56 ) for contact with the housing ( 2 ) and the base plate ( 10 ), respectively.
  8. 8 . The scroll compressor according to claim 1 , wherein the scroll compressor comprises at least one of the following features: the non-return valve device ( 7 ) comprises a valve plate ( 71 ), a baffle ( 72 ) for limiting an opening height of the valve plate ( 71 ), and a screw ( 73 ) for fixing the valve plate ( 71 ) and the baffle ( 72 ) to the housing ( 2 ); a local recessed portion ( 225 ) for accommodating the non-return valve device ( 7 ) is provided at a bottom of the first cavity ( 22 ); the first cavity ( 22 ) is flat.
  9. 9 . The scroll compressor according to claim 3 , wherein the scroll compressor ( 96 ) comprises at least one of the following features: the separating wall ( 21 ) extends parallel to the axial direction ( 32 ) of the scroll compressor ( 96 ); along the axial direction ( 32 ) of the scroll compressor ( 96 ), the separating wall ( 21 ) is flush with the bottom surface ( 24 ) of the housing ( 2 ) facing the base plate ( 10 ).
  10. 10 . A heat pump device, wherein the heat pump device comprises the scroll compressor according to claim 1 , an evaporator ( 90 ), a condenser ( 91 ), an expansion valve ( 92 ), and a gas-injection gas supply device ( 95 ), a gas outlet ( 950 ) of the gas-injection supply device ( 95 ) being connected to a gas-injection port ( 26 ) of the scroll compressor ( 96 ).

Description

BACKGROUND The present application relates to a scroll compressor and a heat pump device. The scroll compressor and heat pump device of the present application can be particularly used in scenarios including vehicles, residences, or industrial plants. In a vehicle or house, a heat pump device is typically used to change the ambient temperature, e.g., to heat or cool. The heat pump device typically has a compressor, a condenser, an evaporator, and an expansion valve. A scroll compressor is often adopted as the compressor, which has many advantages such as high efficiency, smooth operation, and high reliability. Ordinary scroll compressors have low COP (coefficient of performance), especially in low-temperature environments. To further improve efficiency, a scroll compressor of the gas-injection enthalpy-increasing type is currently known. However, the existing gas-injection enthalpy-increasing scroll compressor has a complex gas-injection chamber structure and requires a large number of components, which will cause great expenditure of time and costs during manufacturing and assembly. SUMMARY The aim of the present application is to provide a scroll compressor, wherein a gas-injection chamber of the scroll compressor can be formed with a simple structure and a small number of components. According to a first aspect of the present application, a scroll compressor is provided, the scroll compressor comprising: a movable scroll;a static scroll, the static scroll having a base plate and a scroll wall provided on the base plate; anda housing arranged on a side of the base plate facing away from the scroll wall;wherein,the housing has a first cavity, the first cavity having a first opening on the bottom surface of the housing facing the base plate, the first opening being covered by the base plate to form a gas-injection chamber, the gas-injection chamber being connected via a gas-injection hole on the base plate to a compression chamber corresponding to an intermediate pressure stage formed by the movable scroll and the static scroll, the first cavity being connected to a gas-injection port of the scroll compressor, and a non-return valve device for one-way flow from the gas-injection port to the gas-injection chamber being provided in the first cavity. According to a second aspect of the present application, a heat pump device is provided, the heat pump device comprising the aforementioned scroll compressor, an evaporator, a condenser, an expansion valve, and a gas-injection gas supply device, a gas outlet of the gas-injection gas supply device being connected to a gas-injection port of the scroll compressor. In at least some examples, the positive effects of the present application are as follows: a gas-injection chamber of a scroll compressor can be formed by using a simple structure and a small number of components; the pressure fluctuation of the discharge chamber can be effectively reduced; and the integration of a seal is permitted. BRIEF DESCRIPTION OF THE DRAWINGS In the following, the present application is described in greater detail with reference to the accompanying drawings to provide a better understanding of its principles, features, and advantages. The accompanying drawings include the following: FIG. 1 schematically shows one example of a movable scroll and a static scroll of the scroll compressor of the present application in a cross-sectional view. FIG. 2 shows one example of some components of the scroll compressor of the present application in an exploded perspective view. FIG. 3 schematically shows one example of a housing in a perspective view. FIG. 4 schematically shows one example of a housing, a static scroll, and a discharge hole non-return valve device in a perspective cross-sectional view. FIG. 5 shows the static scroll in FIG. 2 individually in an enlarged manner. FIG. 6 schematically shows one example of a housing, a static scroll, and a discharge hole non-return valve device in a perspective view, wherein the housing is cut open. FIG. 7 schematically shows one example of a static scroll, a seal, and a discharge hole non-return valve device in a perspective view. FIG. 8 shows one example of a housing and a non-return valve device for a gas-injection chamber in a perspective cross-sectional view. FIG. 9 schematically shows one example of a housing and a sensor in a perspective view. FIG. 10 schematically shows one example of a cross section of a separating sealing portion. FIG. 11 schematically shows another example of a housing and a non-return valve device for a gas-injection chamber in an exploded perspective view. FIG. 12 schematically shows the housing and non-return valve device of FIG. 11 in a perspective view. FIG. 13 schematically shows one example of a heat pump device of the present application. DETAILED DESCRIPTION To provide a clearer understanding of the technical problems, technical solutions, and beneficial technical effects to be addressed by the present application