CN212132955U

CN212132955U - Heat exchanger and refrigeration appliance with flow uniform distribution function

Info

Publication number: CN212132955U
Application number: CN201922280272.2U
Authority: CN
Inventors: 郑时红; 赵云鹏; 茅新波
Original assignee: Zhejiang Yifei Technology Co ltd
Current assignee: Zhejiang Yifei Technology Co ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-12-11
Anticipated expiration: 2029-12-18

Abstract

The application discloses a heat exchanger with a flow uniform distribution function, which comprises an air inlet pipe, an air outlet pipe and a heat exchanger body, wherein a plurality of heat exchange pipes connected between the air inlet pipe and the air outlet pipe are arranged in the heat exchanger body; the liquid equalizing device is provided with a liquid equalizing pipe connected between the heat exchange pipes and the air inlet pipe, an outer cavity communicated with the heat exchange pipes and an inner cavity extending into the outer cavity and communicated with the air inlet pipe are arranged in the liquid equalizing pipe, liquid equalizing holes are formed in the wall of the inner cavity, and a refrigerating working medium entering from the air inlet pipe uniformly enters the heat exchange pipes after sequentially passing through the inner cavity, the liquid equalizing holes and the outer cavity. The application also discloses a refrigeration appliance with the heat exchanger.

Description

Heat exchanger and refrigeration appliance with flow uniform distribution function

Technical Field

The application relates to the technical field of heat exchange equipment, in particular to a heat exchanger and a refrigeration appliance with flow uniform distribution function.

Background

At present, heat exchangers are used in refrigeration appliances, and the heat exchangers can be generally used as condensers and evaporators. The heat exchanger can exchange the energy (heat or cold energy) of the circulating refrigerant in the heat exchanger with an external medium (air, water and other gases or liquid) through conduction, natural convection and forced air cooling circulation modes, so that the temperature of the external medium is changed, the temperature of people or objects (such as food) in the area where the medium is located is changed, and the environments with comfortable body feeling or the environments with fresh-keeping and storage of food, suitable operation of equipment and the like are realized.

In order to obtain a large heat exchange effect, forced air cooling circulation is generally adopted to obtain a good environment, and forced convection mode heat exchangers are generally used in air conditioners, air-cooled frostless refrigerators and the like. The heat exchanger is a refrigeration pipeline, refrigerant flows in from one end and flows out from the other end, and fins 11 are paved on the refrigeration pipeline so as to obtain a larger heat transfer area to increase the heat exchange effect.

In order to achieve uniform distribution of heat exchange media, patent application publication No. CN105020940A provides a microchannel heat exchanger capable of uniformly distributing refrigerant flow, and a flow equalizing plate with holes is used to achieve uniform distribution of working medium.

The application provides an improved technical scheme, which is used for enabling a refrigeration working medium to enter a heat exchange tube to be uniformly distributed.

SUMMERY OF THE UTILITY MODEL

The application provides a heat exchanger with a flow uniform distribution function, which comprises an air inlet pipe, an air outlet pipe and a heat exchanger body, wherein one or more parallel heat exchange pipes connected between the air inlet pipe and the air outlet pipe are arranged in the heat exchanger body;

the liquid equalizing device is provided with a liquid equalizing pipe connected between the heat exchange pipes and the air inlet pipe, an outer cavity communicated with the heat exchange pipes and an inner cavity extending into the outer cavity and communicated with the air inlet pipe are arranged in the liquid equalizing pipe, liquid equalizing holes are formed in the wall of the inner cavity, and a refrigerating working medium entering from the air inlet pipe uniformly enters the heat exchange pipes after sequentially passing through the inner cavity, the liquid equalizing holes and the outer cavity.

Preferably, the tail section of the air inlet pipe extends into the outer chamber, the space in the air inlet pipe section extending into the outer chamber is the inner chamber, and the liquid equalizing holes are distributed on the pipe wall of the air inlet pipe.

Preferably, the end part of the air inlet pipe extending into the outer cavity is closed, and a socket matched with the air inlet pipe is arranged on the liquid equalizing pipe.

Preferably, the socket is provided with a limiting spigot, and the outer wall of the air inlet pipe is provided with a spigot protrusion matched with the limiting spigot.

Preferably, the liquid equalizing pipe is of a double-layer sleeve structure, the inner chamber is located in the inner pipe, the outer chamber is located between the inner pipe and the outer pipe, and an inlet communicated with the air inlet pipe is directly communicated with the inner chamber.

Preferably, the diameter of the liquid homogenizing hole is 0.25-0.5 mm or 1/10-1/2 of the diameter of the heat exchange tube.

Preferably, the liquid equalizing pipe is provided with a connector for connecting each heat exchange pipe, and the inner diameter of the connector is 0.05-0.15 mm larger than the outer diameter of the pipe heat pipe.

Preferably, the edge of the interface is provided with an inner flanging sunk into the outer cavity, the inner flanging is in a cone cylinder shape, and the diameter of the inner flanging is gradually contracted along with the depth extending into the outer cavity.

Preferably, a liquid collecting pipe is arranged between the heat exchange pipe and the air outlet pipe, and the liquid collecting pipe and the liquid equalizing pipe have the same structure.

The application also provides a refrigeration appliance, wherein the refrigeration appliance is internally provided with the heat exchanger. The refrigeration appliance refers to an appliance or equipment for exchanging energy between a refrigerant and media such as air and water through a heat exchanger, and particularly refers to an air conditioner (including household and commercial), a household refrigerator and freezer, a commercial refrigerator, a commercial display cabinet and vending machine, an air energy water heater, and the like, and is not limited to the above enumeration.

In this application, by the refrigerant that the intake pipe got into, for realizing refrigerant evenly distributed in each heat exchange tube, set up the liquid-equalizing pipe who improves the structure, the refrigerant that lets in is advanced to be gone into in the cavity buffering, and in getting into outer cavity and flow equalizing each heat exchange tube through liquid-equalizing hole.

Drawings

FIG. 1 is a block diagram of a heat exchanger;

FIG. 2 is a three-view illustration of the heat exchanger of FIG. 1, with a view from the right, b a view from the front and c a view from the left;

FIG. 3 is an assembly diagram of parts of the heat exchanger

FIG. 4 is a cross-sectional view of the homogenizer tube;

FIG. 5 is a view showing the structure of the liquid-equalizing pipe;

FIG. 6 is a view showing the structure of a liquid-equalizing pipe in another embodiment;

FIG. 7 is a structural view of an intake pipe;

FIG. 8 is an assembly view of the liquid-equalizing tube and the air inlet tube in another embodiment;

FIG. 9 is a layout view of heat exchange tubes;

fig. 10 is another arrangement view of heat exchange tubes.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein and, therefore, is not limited to the specific embodiments disclosed below. The terms "upper", "lower", "left" and "right" as used herein are set forth with reference to the corresponding drawings, and it is understood that the presence of the terms does not limit the scope of the present application.

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

As shown in fig. 1-2, the heat exchanger includes: the heat exchanger comprises a heat exchanger body 1, an air inlet pipe 2, an air outlet pipe 3, a fan support 4, a liquid equalizing pipe 5, a liquid collecting pipe 6 and a heat exchange pipe 7. The intake pipe 2 is connected with the liquid-equalizing pipe 5, and the liquid-converging pipe 6 is connected with one or more heat exchange tubes 7 in the heat exchanger body 1, and the liquid-converging pipe 6 is connected with the outlet duct 3, and all the parts that constitute are connected are installed on the fan support 4, and wherein the fan support 4 is used for installing the fan of forced air cooling circulation (if the heat exchanger pipeline refrigerant carries out energy exchange and is liquid such as water, the fan is in this patent the well pump, wind is in this patent the well liquid such as water).

Except for the parallel connection mode of the heat exchanger body (the heat exchange tubes 7), the heat exchanger has the advantages that the air inlet tube 2, the liquid equalizing tube 5, the heat exchanger body 1, the liquid collecting tube 6 and the air outlet tube 3 all flow in series when a refrigerant flows in one cycle, and the refrigerant cannot repeatedly or sectionally flow in and out again for multiple times. As shown in fig. 3

As shown in fig. 4 and 5, the heat exchanger in this embodiment has a flow rate uniform distribution function, a plurality of heat exchange tubes 7 in the heat exchanger body 1 are connected between the air inlet tube 2 and the air outlet tube 3, and the uniform liquid tube 5 is connected between the air inlet tube 2 and each heat exchange tube 7. The liquid equalizing pipe 5 is internally provided with an outer chamber 52 communicated with each parallel pipeline of each heat exchange pipe 7 and an inner chamber 51 extending into the outer chamber 52 and communicated with the air inlet pipe 2, the wall of the inner chamber 51 is provided with a liquid equalizing hole 53, and a refrigerant entering from the air inlet pipe uniformly enters each parallel pipeline of each heat exchange pipe after sequentially passing through the inner chamber 51, the liquid equalizing hole 53 and the outer chamber 52.

The refrigerant enters the liquid equalizing pipe 5 through the air inlet pipe 2 and is uniformly distributed in one or more pipelines (heat exchange pipes 7) of the heat exchanger body 1, the refrigerant flows through the heat exchanger body 1 and exchanges heat with air provided by a fan, and the refrigerant obtains energy through the heat exchange and then flows into the liquid collecting pipe 5 and then flows out of the heat exchanger through the air outlet pipe 3.

Further, when a heat exchange tube 7 is provided, the liquid equalizing tube 5 is mainly used for preventing gas and liquid phases from entering, so that liquid or gas working media enter.

In this embodiment, the liquid-equalizing pipe 5 can make the refrigerant in the air inlet pipe 2 uniformly realize flow distribution, and the refrigerant flows into each parallel pipeline of the heat exchange pipes (heat exchange pipes 7) of the heat exchanger body 1, so as to prevent the refrigerant from directly rushing into the heat exchange pipes of the heat exchanger body 1 and generating uneven distribution caused by refrigerant vortex.

In another embodiment, as shown in fig. 2-6, the end of the air inlet pipe 2 extends into the outer chamber 52, the space in the air inlet pipe extending into the outer chamber 52 is the inner chamber 51, and the liquid equalizing holes 53 are distributed on the pipe wall of the air inlet pipe 2.

In this embodiment, the inner chamber 51 is defined by the space in the end section 21 of the air inlet pipe extending into the liquid-distributing pipe 5, the end 2 of the air inlet pipe is closed, and the liquid-distributing pipe 5 has a socket 54 for the air inlet pipe 2 to enter. Because the end part is blocked, the refrigerant can not directly rush out of the air inlet pipe when the air inlet pipe 2 flows, but flows out of the liquid equalizing hole 53 at the end part, thereby realizing the stability and the uniform distribution of the refrigeration flow. The diameter of the liquid homogenizing hole 53 is 0.25-0.5 mm, the diameter of the liquid homogenizing hole 53 is related to the inner diameter of the heat exchange tube of the heat exchanger body 02, and the liquid homogenizing hole 53 is 1/10-1/2 of the inner diameter of the heat exchange tube of the heat exchanger body 02.

In this embodiment, the intake pipe 2 has the ending point in the mouth of the liquid equalizing pipe 5, and guarantees the matching size of the intake pipe 2 and the liquid equalizing pipe 5, thereby guaranteeing that the flow entering the liquid equalizing pipe 5 is even. Specifically, the method comprises the following steps: the socket 54 is provided with a limit stop 57, and the outer wall of the air inlet pipe 2 is provided with a stop bulge 23 matched with the limit stop 57. The intake pipe section 22 is a mating section that connects to the spigot 54 and maintains a seal.

The socket 54 may be at a radial position of the liquid homogenizing pipe 5 or at an axial position of the liquid homogenizing pipe 5. The bore of socket 54 matches with the outer pipe diameter of intake pipe 2, and the internal diameter of socket 54 will be greater than the outer pipe diameter of intake pipe 2 by 0.05 ~ 0.15mm, for example: if the outer diameter of the air inlet pipe 2 is 5.5mm, the inner diameter of the socket 54 is 5.55-5.65 mm.

The socket 54 is used for flanging or opening expanding (contracting) the pipe wall of the liquid equalizing pipe 5 to ensure the connection reliability of the liquid equalizing pipe 5 and the air inlet pipe 2, and the size of the flanging is 1mm to one time of the outer diameter of the air inlet pipe 5, for example: if the outer diameter of the air inlet pipe 5 is 5.5mm, the size of the flanging or the expansion (contraction) opening of the insertion opening 54 is 1-5.5 mm. The flanging or the expanding (contracting) opening of the socket 54 has a conical structure, so that the demoulding and the prevention of the air inlet pipe 2 extending into the liquid equalizing pipe 5 for too long in the production and manufacturing process are facilitated, and the stopping effect is achieved.

In another embodiment, as shown in fig. 8, the liquid-equalizing pipe 5 has a double-layer sleeve structure, the inner chamber 51 is located in the inner pipe 502, the outer chamber 52 is located between the inner pipe 502 and the outer pipe 501, and the inlet communicated with the air inlet pipe 2 directly opens into the inner chamber 51.

For the convenience of manufacture, the inner tube 502 with the liquid-equalizing hole 53 may be pre-manufactured inside, and the design structure of the liquid-equalizing hole 53 is the same as that of the air inlet tube 05. And is connected with an air inlet pipe 05 without small holes to form a flow uniform distribution structure.

The adaptation is, the socket 54 is in the axial position of the

equal liquid pipe

5, and 5 pipe internal diameters of equal liquid pipe need with intake pipe 2 external diameter phase-match, and 5 pipe mouth internal diameters of equal liquid pipe need be greater than intake pipe 2 external diameter 0.05 ~ 0.15mm promptly.

In another embodiment, as shown in fig. 2, the liquid-equalizing pipe 5 is provided with a connector 55 for connecting each heat exchanging pipe 7. The number of ports 55 corresponds to the number of pipes inside the heat exchanger body 1, for example: if the number of the heat exchange tubes 7 of the heat exchanger body 1 is 6, the number of the interfaces 55 is 6.

The inner diameter of the interface 55 is 0.05-0.15 mm larger than the outer diameter of the heat exchange tube 7 of the heat exchanger body 1, for example: if the outer diameter of the heat exchange tube 7 of the heat exchanger body 1 is 2.5mm, the inner diameter of the small hole is 2.55-2.65 mm.

On the basis of the above embodiment, the interface 55 is further flanged, an inner flange 56 sinking into the outer cavity 52 is arranged at the edge of the interface, the inner flange 56 is in a conical cylinder shape, and the diameter of the inner flange gradually shrinks along with the depth extending into the outer cavity. Interface 55 carries out the turn-ups and handles to guarantee the reliability of being connected of the interior heat exchange tube of liquid averaging pipe 5 and heat exchanger body 1, the outside diameter of turn-ups's size for 1mm ~ one time heat exchanger body 1 interior heat exchange tube, for example: if the diameter of the heat exchange tube in the heat exchanger body 1 is 2.5mm, the size of the small hole flanging is 1-2.5 mm. The turn-ups of interface 55 has the toper structure, is convenient for drawing of patterns and prevents in the production manufacturing process that the heat exchange tube stretches into 5 overlengths of soaking tube and plays the effect of ending the position in heat exchanger body 1, prevents that the length that the heat exchange tube stretches into soaking tube 5 in the heat exchanger body 1 is inconsistent, causes to divide the liquid inhomogeneous.

The material of the liquid-equalizing pipe 5 is associated with the heat exchanger body 1 and the inlet pipe 2 to which it is connected, for example: if the heat exchange tube of the connected heat exchanger body 1 is an aluminum tube, the material of the liquid equalizing tube 5 is aluminum material, and the material of the air inlet tube 2 is aluminum material. If the heat exchange tube of the connected heat exchanger body 1 is a copper tube, the material of the liquid equalizing tube 5 is a copper material, and the material of the air inlet tube 2 is a copper material.

In another embodiment, a liquid collecting pipe 6 is arranged between the heat exchange pipe 7 and the gas outlet pipe 3, and the liquid collecting pipe 6 and the liquid equalizing pipe 5 have the same structure.

The heat exchanger is provided with a liquid collecting pipe 6, in order to ensure that the refrigerant in the heat exchange pipe of the heat exchanger body 1 is uniformly distributed, liquid collecting pipes (comprising a liquid homogenizing pipe 5 and the liquid collecting pipe 6) are arranged at the upper part and the lower part of the assembling and installing position of the heat exchanger, specifically, a liquid homogenizing pipe 06 is arranged below the heat exchanger, and a liquid collecting pipe 04 is arranged above the heat exchanger, referring to fig. 1.

The refrigerant flows to the liquid collecting pipe 6 through the heat exchanger body 1 and flows to the air outlet pipe 3 to flow out of the heat exchanger through the liquid collecting pipe 5 and the heat exchange pipes in the heat exchanger body 1;

the heat exchanger body 1 in the application is composed of heat exchange tubes, and can be without fins 11 or with fins 11 to increase the heat transfer area.

The heat exchange tube 7 is used for leading the refrigerant to flow through the tube after entering from the liquid equalizing tube 5 and flow to the liquid collecting tube 6 to flow out of the heat exchanger body 1, and the shape of the tube can be a straight tube or a coiled tube. The following shapes are all the conduit shapes described in this patent, as shown in fig. 9 and 10.

The heat exchange tubes 7 can be connected in parallel through pipelines, and the refrigerant can uniformly flow through the pipelines from the liquid equalizing pipe and finally collect in the liquid collecting pipe 04 and flow out of the heat exchanger body 02.

The heat exchange tube 7 may be a thin tube having a diameter of more than 1mm (excluding 1mm) to 4mm (excluding 4mm), or a thick tube having a diameter of 4mm (inclusive) to 8mm (excluding).

The heat exchange tube 7 can be made of copper tubes, aluminum tubes or stainless steel tubes, and the shape of the inner wall of the pipeline can be light tubes or threaded tubes and the like, and the shape of the inner part of the pipeline can be changed to increase the heat transfer area.

As shown in fig. 1, the heat exchanger of the present application is provided with a fan bracket 4 so as to mount a fan, and performs heat exchange in a circulating manner when the fan is operated and a refrigerant flows in a heat exchanger body 1.

Fig. 1 shows only a specific example of heat exchange between the wind generated by the fan and the heat exchanger, and the fan may be arranged in front of or behind the heat exchanger, or in the up-and-down position of the heat exchanger.

The material of the fan bracket can be a metal plate, such as a steel plate which is subjected to pre-coating treatment and has corrosion resistance, such as a pre-coating plate, a galvanized plate or an aluminum plate; the fan bracket can also be made of engineering plastics, such as ABS, HIPS, PP and the like.

The heat exchanger in the application adopts a welding mode, wherein the welding mode can be copper-aluminum welding, copper-copper welding and aluminum-aluminum welding, so that the sealing performance of each connecting point of the whole heat exchanger is ensured to reach that the annual leakage quantity of a refrigerant is less than or equal to 0.2 g; meanwhile, the parts of the heat exchanger and the internal pressure of the pipeline are guaranteed to be not deformed and damaged under the pressure of 3.5 MPa.

The heat exchanger can be used on a refrigeration appliance as a condenser and/or an evaporator, and when the heat exchanger is used as the condenser, heat of refrigerant flowing through the heat exchanger body 1 can be exchanged by forced convection of a fan; when used as an evaporator, the cold energy of the refrigerant flowing through the heat exchanger body 1 can be exchanged by forced convection of a fan.

In another embodiment, a refrigeration appliance having a heat exchanger of the above construction therein. The refrigeration appliance refers to an appliance or equipment for exchanging energy between a refrigerant and media such as air and water through a heat exchanger, and particularly refers to an air conditioner (including household and commercial), a household refrigerator and freezer, a commercial refrigerator, a commercial display cabinet and vending machine, an air energy water heater, and the like, and is not limited to the above enumeration.

The above description is only exemplary of the preferred embodiment of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. The heat exchanger with the flow uniform distribution function comprises an air inlet pipe, an air outlet pipe and a heat exchanger body, wherein one or more parallel heat exchange pipes connected between the air inlet pipe and the air outlet pipe are arranged in the heat exchanger body; the method is characterized in that:

2. The heat exchanger with the flow uniform distribution function according to claim 1, wherein the tail section of the air inlet pipe extends into the outer chamber, the space in the air inlet pipe section extending into the outer chamber is the inner chamber, and the liquid distribution holes are distributed on the pipe wall of the air inlet pipe.

3. The heat exchanger with flow uniform distribution function according to claim 2, characterized in that the end part of the air inlet pipe extending into the outer chamber is closed, and the liquid distribution pipe is provided with a socket matched with the inlet of the air inlet pipe.

4. The heat exchanger with the function of uniformly distributing the flow according to claim 3, wherein a limiting spigot is arranged at the socket, and a stopping protrusion matched with the limiting spigot is arranged on the outer wall of the air inlet pipe.

5. The heat exchanger with flow uniform distribution function according to claim 1, wherein the liquid distribution pipe is of a double-layer sleeve structure, the inner chamber is located in the inner pipe, the outer chamber is located between the inner pipe and the outer pipe, and an inlet communicated with the air inlet pipe is directly communicated with the inner chamber.

6. The heat exchanger with the function of uniformly distributing flow according to claim 1, wherein the diameter of the liquid-distributing hole is 0.25-0.5 mm or 1/10-1/2 of the diameter of the heat exchange tube.

7. The heat exchanger with the flow uniform distribution function according to claim 1, wherein the liquid uniform pipe is provided with a connector for connecting each heat exchange pipe, and the inner diameter of the connector is 0.05-0.15 mm larger than the outer diameter of the pipe heat pipe.

8. The heat exchanger with flow uniform distribution function according to claim 7, characterized in that the edge of the interface is provided with an inner flanging sunk into the outer cavity, the inner flanging is in a cone cylinder shape, and the diameter of the inner flanging is gradually contracted along with the depth extending into the outer cavity.

9. The heat exchanger with flow uniform distribution function according to any one of claims 1 to 8, characterized in that a liquid collecting pipe is arranged between the heat exchange pipe and the gas outlet pipe, and the liquid collecting pipe and the liquid distributing pipe have the same structure.

10. A refrigerator having a heat exchanger as claimed in any one of claims 1 to 9.