CN211739551U

CN211739551U - Air energy heat pump evaporator

Info

Publication number: CN211739551U
Application number: CN201922255733.0U
Authority: CN
Inventors: 刘彬; 刘震祥; 刘杨; 杨光明; 吴洪江
Original assignee: Duyun Jiayu New Energy Technology Development Co ltd
Current assignee: Duyun Jiayu New Energy Technology Development Co ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-10-23
Anticipated expiration: 2029-12-16

Abstract

The utility model discloses an air energy heat pump evaporator, which comprises a plurality of heat absorbing fins arranged in parallel and a refrigerant conduit which is S-shaped and is inserted on the heat absorbing fins; each heat absorption fin is formed by connecting 2 single-layer metal sheets in a connecting mode and is hollow. The utility model has the characteristics of area of contact is big, and heat transfer and heat absorption are efficient, and the energy consumption is low.

Description

Air energy heat pump evaporator

Technical Field

The utility model relates to an air energy heat pump, especially an air energy heat pump evaporator.

Background

The air energy heat pump generates heat energy by utilizing the energy in the air, can provide different hot water and cold and warm requirements for a whole family at a large water volume, a high water pressure and a constant temperature 24 hours a day, and can simultaneously meet the requirements by consuming the least energy.

An air-source heat pump generally includes an indoor part, which is a water tank, and an outdoor part, which is also called an outdoor unit or an external unit, and is mainly used to absorb the temperature of the external environment. The prior art is mainly composed of a box body, an evaporator, a compressor, a throttle valve and a fan, adopts Carnot reverse circulation and is formed by four circulation processes of refrigerant isothermal evaporation, refrigerant steam constant-entropy compression, refrigerant isobaric cooling and refrigerant liquid constant-entropy expansion. When the air conditioner works, the evaporator is used for absorbing low-temperature heat energy in air, refrigerant in the evaporator is subjected to isothermal evaporation after heat exchange with the low-temperature heat energy to form refrigerant steam, the compressor sucks the refrigerant steam and compresses the refrigerant steam into high-temperature and high-pressure refrigerant gas to enter the condenser for cooling, heat carried by the refrigerant and cold water are subjected to heat exchange in the cooling process, and finally the refrigerant returns to the evaporator after being subjected to constant-entropy expansion in the throttling valve to repeat the above circulation, so that the heat energy is transferred to the cold water by using an air source to heat the cold water.

In the refrigerant circulation process of the heat pump, the heat exchange efficiency of the refrigerant in the evaporator and the air is a factor directly influencing the performance and the energy consumption of the heat pump, and the higher the heat exchange efficiency is, the better the heat pump performance is, and the lower the energy consumption is. The existing evaporator is mostly of a structure that heat absorption fins are added with bent pipes, the heat absorption fins are made of metal sheets with high heat conductivity, heat is absorbed through the fins, heat conduction is achieved through the bent pipes wound between the fins, heat exchange of refrigerants in the bent pipes is achieved, the metal sheets are thin, the contact area with the bent pipes is small, the heat conduction area is insufficient, heat exchange efficiency is low, meanwhile, the metal sheets on the single sheets are easy to exchange into surrounding air after absorbing heat, temperature cannot be locked for a long time, temperature change is large, and heat absorption efficiency is reduced. Therefore, how to improve the heat exchange and absorption efficiency of the heat pump by changing the structure of the evaporator will be an ongoing goal of air energy heat pump technology developers.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an air energy heat pump evaporator. The utility model has the characteristics of area of contact is big, and heat transfer and heat absorption are efficient, and the energy consumption is low.

The technical scheme of the utility model: an air energy heat pump evaporator comprises a plurality of heat absorption fins arranged in parallel and a refrigerant conduit inserted on the heat absorption fins in an S shape; each heat absorption fin is formed by connecting 2 single-layer metal sheets in a connecting mode and is hollow.

In the air-source heat pump evaporator, the outer side of the intersection of the heat absorption fin and the refrigerant conduit is provided with the bell mouth, and the necking end of the bell mouth is in close contact with the outer wall of the refrigerant conduit.

In the air-source heat pump evaporator, the cross section of the refrigerant conduit is in a flat tubular shape, and the shape of the necking end of the bell mouth is consistent with the shape of the cross section of the refrigerant conduit.

In the air energy heat pump evaporator, the refrigerant conduit and two sides of the flared end of the horn mouth are respectively provided with an inwardly concave arc-shaped concave portion.

In the air-source heat pump evaporator, 1 conductive wire is respectively arranged at two ends of the heat absorption fin in the length direction along the length direction of the refrigerant conduit, a plurality of parallel electric heating wires are arranged between the conductive wires at the two ends, and the electric heating wires are arranged in the hollow heat absorption fin.

In the air energy heat pump evaporator, the ceramic insulating tube is sleeved outside the electric heating wire.

The beneficial effects of the utility model

1. The utility model discloses a change traditional individual layer heat absorption fin into double-deck cavity form heat absorption fin, the inner space of the heat absorption fin of cavity form also can regard as the area with refrigerant pipe direct contact, consequently, very big increase the area of contact of heat absorption fin with refrigerant pipe, improved the efficiency of heat transfer.

2. The utility model discloses a design of the heat absorption fin of cavity form, after the heat absorption fin absorbs heat, the heat can stop in the cavity of heat absorption fin and accumulate to pin the heat, make its inside air directly carry out the heat exchange with cross section's refrigerant pipe, very big improvement heat absorption efficiency and heat exchange efficiency, have fabulous effect to the energy consumption that reduces the heat pump.

3. The utility model discloses a set up the horn mouth at heat absorption fin and refrigerant pipe cross section, can further improve the area of contact of heat absorption fin and refrigerant pipe, improve heat exchange efficiency.

4. The refrigerant guide pipe is arranged into a flat tubular shape, so that the contact area between the heat absorption fin and the refrigerant guide pipe is further increased, and the heat exchange efficiency is improved; similarly, the arc-shaped concave part is arranged on the contact surface of the heat absorption fin and the refrigerant guide pipe, so that the contact area of the heat absorption fin and the refrigerant guide pipe is further increased, and the heat exchange efficiency is improved.

5. The utility model can effectively avoid the fins frosting by arranging the heating wires in the heat absorption fins and starting the evaporator in cold weather, and simultaneously supplements certain heat to the evaporator, thereby improving the heat absorption and heat exchange efficiency of the evaporator in cold weather, reducing the load of the system and reducing the energy consumption; meanwhile, because the heating wire is arranged inside the hollow heat absorbing fin, heat directly acts on the heat absorbing fin through the air inside, the defrosting effect is better, the defrosting energy consumption is lower, the redundant heat can directly realize heat exchange with the refrigerant conduit through the air inside, the heat exchange efficiency is improved, the possibility that the heat of the heating wire is dissipated to the surrounding air is reduced, the energy consumption utilization rate is improved, and the energy loss is reduced.

6. The utility model discloses an in locating ceramic-insulated tube with the heating wire, avoid taking place the possibility of electric leakage, use safelyr.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a partial cross-sectional view of a heat sink fin;

FIG. 3 is a schematic view of the overall structure of the heat absorbing fin;

FIG. 4 is a schematic plan view of the intersection of the heat absorbing fin and the refrigerant conduit;

fig. 5 is a schematic structural view of the heating wire and the ceramic insulating tube.

Description of reference numerals: the heat-absorbing heat-conducting tube comprises 1-a heat-absorbing fin, 2-a refrigerant conduit, 3-a bell mouth, 4-a conducting wire, 5-an electric heating wire, 6-an arc-shaped concave part and 7-a ceramic insulating tube.

Detailed Description

The present invention will be further described with reference to the following examples, which are not intended as a limitation of the present invention.

Embodiments of the utility model

An air energy heat pump evaporator is shown in figures 1-5 and comprises a plurality of heat absorbing fins 1 arranged in parallel and a refrigerant conduit 2 inserted in the heat absorbing fins 1 in an S shape; each heat absorption fin 1 is formed by connecting 2 single-layer metal sheets in a hollow manner.

Pass through the mould suppression with the absorbing fin of individual layer, middle part extrusion pit, two individual layer absorbing fins set up relatively, the pit is outwards, can form the absorbing fin 1 of cavity form after welding around the junction, it can to set up a plurality of through-holes on the absorbing fin 1 and supply refrigerant pipe 2 to pass, in operation, absorbing fin 1 absorbs heat in the air, and take place heat exchange with refrigerant pipe 2 and inside refrigerant, partial heat gets into the cavity of absorbing fin 1, and be locked, make the inside temperature of absorbing fin 1 be higher than outside temperature, the heat is by transient locking and quick and carry out heat-conduction with refrigerant pipe 2, because the temperature is higher, heat exchange area is great, so heat exchange efficiency has obtained very big improvement.

Preferably, the outer side of the intersection of the heat absorption fin 1 and the refrigerant guide pipe 2 is provided with a bell mouth 3, the necking end of the bell mouth 3 is in close contact with the outer wall of the refrigerant guide pipe 2, and the bell mouth 3 is formed by die punch forming.

Preferably, the refrigerant conduit 2 has a flat tubular cross section, and the shape of the throat end of the bell mouth 3 is identical to the cross-sectional shape of the refrigerant conduit 2, thereby increasing the contact area.

Preferably, two sides of the necking end of the refrigerant conduit 2 and the flare 3 are respectively provided with an inward-concave arc-shaped concave part 6, so that the contact area of the refrigerant conduit 2 and the heat absorbing fin 1 and the contact area of the refrigerant conduit 2 and air are increased.

Preferably, two ends of the heat absorbing fin 1 in the length direction are respectively provided with 1 conductive wire 4 arranged along the length direction of the refrigerant conduit 2, a plurality of parallel electric heating wires 5 are arranged between the conductive wires 4 at the two ends, and the electric heating wires 5 are arranged in the hollow heat absorbing fin 1. The electric lead 4 at both ends connects gradually the positive negative pole of power, forms the return circuit, and during the circular telegram, heating wire 5 produced the heat, starts during cold weather, and the heat that produces can carry out the defrosting to heat absorption fin 1 to the heat is accumulated inside, reduces and directly takes place heat exchange with the air and lead to the possibility of heat dissipation, has improved thermal utilization efficiency.

Preferably, a ceramic insulating tube 7 is sleeved outside the heating wire 5, and the ceramic insulating tube 7 prevents the heating wire 5 from directly contacting the heat absorbing fin 1 to cause electric leakage.

The above, only do the utility model discloses create the embodiment of preferred, nevertheless the utility model discloses the protection scope of creation is not limited to this, and any technical personnel who is familiar with this technical field are in the utility model discloses create the technical scope of disclosure, according to the utility model discloses technical scheme and the utility model design that creates of the utility model are equivalent replacement or change, all should be covered within the protection scope of creation of the utility model.

Claims

1. An air-source heat pump evaporator, characterized in that: comprises a plurality of heat absorbing fins (1) arranged in parallel and a refrigerant conduit (2) inserted on the heat absorbing fins (1) in an S shape; each heat absorption fin (1) is formed by connecting 2 single-layer metal sheets in a hollow manner.

2. The air-energy heat pump evaporator of claim 1, wherein: the outer side of the intersection of the heat absorption fin (1) and the refrigerant guide pipe (2) is provided with a bell mouth (3), and the necking end of the bell mouth (3) is in close contact with the outer wall of the refrigerant guide pipe (2).

3. The air-energy heat pump evaporator of claim 2, wherein: the section of the refrigerant guide pipe (2) is in a flat tubular shape, and the shape of the necking end of the bell mouth (3) is consistent with that of the section of the refrigerant guide pipe (2).

4. The air-energy heat pump evaporator of claim 3, wherein: and two sides of the necking end of the refrigerant conduit (2) and the bell mouth (3) are respectively provided with an inward-sunken arc-shaped concave part (6).

5. The air-energy heat pump evaporator of claim 1, wherein: the two ends of the heat absorption fins (1) in the length direction are respectively provided with 1 conducting wire (4) arranged along the length direction of the refrigerant guide pipe (2), a plurality of parallel electric heating wires (5) are arranged between the conducting wires (4) at the two ends, and the electric heating wires (5) are arranged in the hollow heat absorption fins (1).

6. The air-energy heat pump evaporator of claim 5, wherein: and a ceramic insulating tube (7) is sleeved outside the electric heating wire (5).