Refrigerant uniform-flow distributor, heat exchanger assembly, and refrigeration device

Abstract

The present invention provides a refrigerant uniform-flow distributor, a heat exchanger assembly, and a refrigeration device, and the refrigerant uniform-flow distributor includes a body and a baffle. A liquid inlet pipe assembly hole is formed in a liquid inlet end of the body, and an inner wall of the liquid inlet end of the body extends obliquely towards a liquid outlet end of the body, with a generatrix being an arc or inclined straight line, and a plurality of branch pipe holes are formed in the liquid outlet end of the body. The baffle divides an accommodating chamber into a first chamber and a second chamber, and a plurality of baffle holes are formed in the baffle in a circular distribution around a centerline of the body, and the plurality of baffle holes are in a one-to-one correspondence with the plurality of branch pipe holes.

1 . A refrigerant uniform-flow distributor, comprising:
 a body, comprising a liquid inlet end, a liquid outlet end, and an accommodating chamber communicating with the liquid inlet end and the liquid outlet end separately, wherein a liquid inlet pipe assembly hole is formed at the liquid inlet end of the body, an inner wall of the liquid inlet end extends obliquely towards the liquid outlet end of the body, with a generatrix of the inner wall being an arc or inclined straight line, and a plurality of branch pipe holes for liquid distribution are formed at the liquid outlet end of the body;   a baffle, disposed inside the accommodating chamber of the body to divide the accommodating chamber into a first chamber and a second chamber, a plurality of baffle holes distributed in a circular shape around a centerline of the body and communicating with the first chamber and the second chamber are formed in the baffle, the plurality of baffle holes are used to be in a one-to-one correspondence with the plurality of branch pipe holes, and are located on an outer periphery of the liquid inlet pipe assembly hole when projected along an axial direction of the body; and   a line connecting a projection position A, on an inner wall of the liquid inlet end, of an outer edge of a downstream end of the baffle hole along the axial direction of the body and a center O of a downstream end of the liquid inlet pipe assembly hole forms an angle α with respect to a radial direction of the baffle, and 8°≤α≤17°, an axial distance H 1  from a surface of the baffle at which an upstream end of the baffle hole is located to the projection position A satisfies: 1 mm≤H 1 ≤5 mm, and the outer edge of the downstream end of the baffle hole means an edge of the downstream end of the baffle hole farthest from a centerline of the body.   
     
     
         2 . The refrigerant uniform-flow distributor according to  claim 1 , wherein the plurality of baffle holes are distributed at equal intervals in a circular shape in the baffle, a quantity of the baffle holes is the same as a quantity of the branch pipe holes, each baffle hole is basically coaxial with a corresponding branch pipe hole, and a ratio of a diameter D 1  of the downstream end of the baffle hole to an outer diameter D 2  of a branch pipe inserted into the branch pipe hole is set to 0.8-1.2. 
     
     
         3 . The refrigerant uniform-flow distributor according to  claim 1 , wherein the refrigerant uniform-flow distributor further comprises a plurality of branch pipes respectively connected to the plurality of branch pipe holes, each branch pipe comprises a first pipe section and a second pipe section located downstream of the first pipe section and with an inner diameter reduced relative to an inner diameter of a downstream end of the first pipe section, and a difference Δd between the inner diameter d 11  of the downstream end of the first pipe section and an inner diameter d 12  of a downstream end of the second pipe section is: 0.1 mm≤Δd≤3.5 mm; and a reflective section, bending and extending to one side relative to a centerline of the branch pipe hole, is formed on the first pipe section, an axis at an upstream end of the reflective section intersects with an axis at a downstream end of the reflective section to form an angle θ, wherein 90°≤θ≤175°, and based on the reflective section, an axis of the second pipe section intersects with the centerline of the branch pipe hole. 
     
     
         4 . The refrigerant uniform-flow distributor according to  claim 1 , wherein the refrigerant uniform-flow distributor further comprises a plurality of branch pipes respectively connected to the plurality of branch pipe holes, each branch pipe comprises a connecting straight section, a jet part located downstream of the connecting straight section and with an inner diameter reduced relative to an inner diameter of a connecting straight section body, and a branch section located downstream of the jet part, the branch section is provided with an equal-diameter section with an inner diameter basically approximate to the inner diameter of the connecting straight section body, and a difference Δd′ between the inner diameter d 1   l ′ of the connecting straight section body and a minimum inner diameter d 12 ′ of the jet part is: 0.1 mm≤Δd′≤3.5 mm. 
     
     
         5 . The refrigerant uniform-flow distributor according to  claim 1 , wherein the baffle holes are through holes with basically the same diameters;
 diameters of the baffle holes are gradually decreased along a flowing direction of the refrigerant, and generatrices of inner walls of the baffle holes are straight lines or curved lines; or   the baffle holes are arc-shaped bubble holes with hole walls protruding towards one or both sides of the baffle.   
     
     
         6 . The refrigerant uniform-flow distributor according to  claim 1 , wherein the baffle is a plate structure with two nearly flat side surfaces; or
 a region on the baffle opposite to the liquid inlet pipe assembly hole is concave towards a direction in which the liquid outlet end of the body is located, to form a reflective mixed chamber with an opening facing the liquid inlet pipe assembly hole.   
     
     
         7 . The refrigerant uniform-flow distributor according to  claim 1 , wherein the refrigerant uniform-flow distributor further comprises a liquid inlet pipe welded to the liquid inlet pipe assembly hole, and an axial length L from a liquid outlet end surface of the liquid inlet pipe to a surface of the baffle at which the upstream ends of the baffle holes are located satisfies 3.5 mm≤L≤11.5 mm. 
     
     
         8 . The refrigerant uniform-flow distributor according to  claim 7 , wherein a connecting section welded to the liquid inlet pipe assembly hole is formed on the liquid inlet pipe, and the connecting section is a straight section; or
 the connecting section has a gradually expanding structure with a generatrix of an outer wall being an arch-shaped curve, the connecting section extends into the first chamber through the liquid inlet pipe assembly hole, and an outer wall of the connecting section is welded closely to the inner wall of the liquid inlet end of the body.   
     
     
         9 . The refrigerant uniform-flow distributor according to  claim 7 , wherein the liquid inlet pipe is a circular pipe with the basically same wall thickness, the liquid inlet pipe is connected to the liquid inlet pipe assembly hole and comprises at least one Venturi pipe section, each Venturi pipe section comprises a tapered section with a gradually decreased inner diameter, a throat-like straight section with the basically same inner diameter, and a gradually increased section with a gradually increased inner diameter that are distributed in sequence along a flowing direction of a refrigerant. 
     
     
         10 . The refrigerant uniform-flow distributor according to  claim 9 , wherein two Venturi pipe sections connected in series are formed on the liquid inlet pipe, namely an upstream Venturi pipe section and a downstream Venturi pipe section, an inner diameter of a throat-like straight section of the downstream Venturi pipe section is less than or equal to an inner diameter of a throat-like straight section of the upstream Venturi pipe section. 
     
     
         11 . The refrigerant uniform-flow distributor according to  claim 9 , wherein the liquid inlet pipe further comprises a variable-diameter orifice plate disposed downstream of the Venturi pipe section, a variable-diameter orifice is provided in the variable-diameter orifice plate, and the variable-diameter orifice comprises a tapered orifice section with a gradually decreased diameter along the flowing direction of the refrigerant and a throat-like orifice section located downstream of the tapered orifice section with a basically unchanged diameter. 
     
     
         12 . The refrigerant uniform-flow distributor according to  claim 1 , wherein the branch pipe holes comprise drainage hole sections and connecting hole sections that are sequentially distributed along a flowing direction of a refrigerant, with diameters of the drainage hole sections gradually decreased along the flowing direction of the refrigerant and generatrices of inner walls of the drainage hole sections being straight lines or arcs. 
     
     
         13 . The refrigerant uniform-flow distributor according to  claim 12 , wherein an angle β formed between a tangent at each of the generatrices of the inner walls of the drainage hole sections and a centerline of the branch pipe hole satisfies 10°≤β≤65°. 
     
     
         14 . The refrigerant uniform-flow distributor according to  claim 12 , wherein a diameter of a downstream end of the drainage hole section is set to be smaller than a diameter of the connecting hole section, a limiting part which protrudes toward a center direction of the branch pipe hole is formed at a junction between the drainage hole section and the connecting hole section, the limiting part is configured to abut against an end surface of a branch pipe inserted into the branch pipe hole, and a diameter of the limiting part is basically approximate to an inner diameter of the inserted branch pipe. 
     
     
         15 . The refrigerant uniform-flow distributor according to  claim 12 , wherein the refrigerant uniform-flow distributor comprises a deflector welded closely to an inner end wall of the liquid outlet end of the body, and the deflector is provided with a plurality of deflector holes serving as drainage hole sections of the branch pipe holes; or
 the drainage hole section and the connecting hole section are integrally formed on the end wall of the liquid outlet end of the body.   
     
     
         16 . The refrigerant uniform-flow distributor according to  claim 1 , wherein the refrigerant uniform-flow distributor further comprises a flow channel forming component disposed in the second chamber and located on inner peripheries of the plurality of branch pipe holes, the flow channel forming component is a rotating component formed by protruding and extending from an inner bottom wall of the liquid outlet end of the body towards a direction in which the baffle is located and rotating around an axis of the body, a circular flow channel communicating the baffle holes with the plurality of branch pipe holes is enclosed between the flow channel forming component and an inner peripheral wall of the second chamber, and a cross-section of the flow channel forming component remains basically unchanged or gradually decreased along an extension direction of the flow channel forming component. 
     
     
         17 . The refrigerant uniform-flow distributor according to  claim 16 , wherein the flow channel forming component is a sleeve with a cross-section that remains basically unchanged along the extension direction, and an upper end of the sleeve abuts against a baffle region of inner peripheries of the plurality of baffle holes. 
     
     
         18 . The refrigerant uniform-flow distributor according to  claim 16 , wherein the cross-section of the flow channel forming component is gradually decreased along the extension direction, and a vertical distance H 2  from an extended top end of the flow channel forming component to a downstream surface of the baffle satisfies: 1 mm≤H 2 ≤2H 0 /3, wherein H 0  is a height of the second chamber. 
     
     
         19 . The refrigerant uniform-flow distributor according to  claim 16 , wherein a radial distance L 1  from a bottom outer periphery of the flow channel forming component to an inner peripheral wall of the second chamber satisfies: L 1 ≤28 mm. 
     
     
         20 . The refrigerant uniform-flow distributor according to  claim 16 , wherein the plurality of baffle holes are distributed at equal intervals in the baffle in an annular array, with a quantity of the baffle holes equal to a quantity of the branch pipe holes, and each baffle hole is basically coaxial with a corresponding branch pipe hole. 
     
     
         21 . The refrigerant uniform-flow distributor according to  claim 16 , wherein the plurality of baffle holes are distributed in the baffle in a plurality of annular arrays, and a plurality of baffle holes with a same quantity are distributed at equal intervals in each annular array. 
     
     
         22 . A heat exchanger assembly, comprising the refrigerant uniform-flow distributor as claimed in  claim 1 . 
     
     
         23 . A refrigeration device, comprising the heat exchanger assembly as claimed in  claim 22 .