CN105698433A - Double-ended air source heat pump system with phase change material radiant floor heating - Google Patents

Abstract

The invention discloses a double-terminal air-source heat pump system with a phase-change thermal storage material for floor radiation heating, which includes air-conditioning equipment and a floor radiation heating terminal device; the floor radiation heating terminal device includes an insulation layer, a phase-change thermal storage module and aluminum foil Layer, the groove of the insulation layer is filled with modular phase-change heat storage material, the upper surface of the phase-change heat storage material and the aluminum foil layer are provided with downward arc depressions at the groove, each arc depression The heating branch pipe is laid, and the two ends of the heating branch pipe are connected to the heat supply and return main pipes through the distributor; the air-conditioning equipment and the floor radiant heating end device are connected through branch pipes; There is a regulating control valve, and the connecting pipe is filled with refrigerant. The invention can improve the energy efficiency ratio of the air source heat pump, satisfy the indoor thermal comfort and solve the defrosting problem at the same time; it can be produced in a modular manner, spliced and installed on site, and the construction difficulty is reduced.

Description

Double-terminal air source heat pump system with phase change heat storage material floor radiant heating

technical field

The invention relates to an air-source heat pump air-conditioning system device, in particular to a floor heating terminal device and a cooling terminal device with aluminum foil for heat conduction, phase change heat storage, and direct condensation.

Background technique

With the development of social and economic level, people's requirements for indoor environment continue to increase, and building energy consumption continues to increase. From 1996 to 2013, the building area increased rapidly, and the total building energy consumption has reached more than 28% of my country's total energy consumption. Among them, air-conditioning and heating energy consumption can exceed 50% of the total building energy consumption, so reducing air-conditioning and heating energy consumption has become one of the key issues in building energy conservation and emission reduction. In recent years, air source heat pumps have been widely used in the field of HVAC due to their advantages of high efficiency, cleanliness, stability and applicability to climatic conditions.

Low-temperature hot water floor radiant heating proposed in the early 20th century has attracted the attention of academic circles and has been widely used due to its advantages in energy saving, wide application of heat sources, and strong thermal comfort. The combination of air source heat pump and floor radiant heating system not only improves the utilization rate of clean energy, but also expands the scope of application of air source heat pump heating technology. In 2002, the Ministry of Construction of my country identified the air source heat pump floor radiant heating system as the first domestic technology, and it has been widely developed and applied.

Frosting on the surface of the evaporator of the outdoor unit of the air source heat pump is a difficult problem in the operation of the air source heat pump in winter. Frosting of the outdoor unit causes problems such as insufficient heat supply of the heat pump, increase in compressor compression ratio and exhaust temperature, decrease in energy efficiency ratio of the unit, and increase in heat loss of the unit, which affect the operating efficiency and stability of the air source heat pump system in winter and the indoor heat loss. One of the key factors of comfort has become a bottleneck in the development and application of air source heat pump technology.

Contents of the invention

In view of the above-mentioned prior art, the purpose of the present invention is to propose an air-source heat pump double-terminal air-conditioning system form in winter and summer, using air as the cold and heat source, cooling the room through the indoor unit in summer, and using the air-source heat pump and direct condensation floor radiation The heating system is matched and connected, using refrigerant as the heat medium to heat the room, reducing the condensation temperature, using clean energy, no pollutant emissions, no secondary heat medium, reducing system energy loss and transportation energy consumption; adding phase change heat storage at the end Material, aluminum foil layer is laid to improve the uniformity of temperature distribution and enhance heat transfer. The phase change material stores heat to provide heat for defrosting, and maintains the floor surface temperature while defrosting to ensure thermal comfort; reduces the condensing temperature in winter conditions and improves Air source heat pump energy efficiency ratio; intelligent optimization control of system operation to meet indoor thermal comfort while reducing system energy consumption; modular production, selection and on-site splicing and installation according to the indoor load requirements of different functional rooms, reducing construction difficulty.

In order to solve the above technical problems, the present invention proposes a double-terminal air source heat pump system with phase change heat storage material floor radiation heating, including an air source heat pump outdoor unit, a controller, a cooling terminal and a floor radiation heating terminal device; the floor radiant heating terminal device includes a heating terminal distributor, a heating main pipe and a heating main pipe, one end of the heating terminal distributor is connected to the heating main pipe, and the other end of the heating terminal distributor is connected to the heating main pipe. The heat recovery dry pipe is connected, between the floor and the floor, from the upper surface of the floor to the lower surface of the floor, a moisture-proof layer, thermal insulation material and aluminum foil layer are laid sequentially, and a plurality of phases are arranged between the thermal insulation material and the aluminum foil layer. Each phase change heat storage unit includes a groove arranged on the upper surface of the phase change heat storage module, and the aluminum foil layer is provided with a downward arc recess at the groove, and the arc recess Consistent with the direction of the groove, a section of branch pipe is laid in the circular arc depression. The pipe section between the arc depressions is an elbow; the groove is filled with a modular phase change heat storage material; the inlet/outlet of the heating terminal distributor and the inlet/outlet of the cooling terminal device are connected to the The inlet and outlet of the air source heat pump outdoor unit are connected through branch pipes respectively; The pipes of the device are equipped with regulating control valves.

Furthermore, the radius and depth of the arc-shaped depression are the same as the outer diameter of the branch pipe laid therein.

The circular arc depressions where a section of branch pipe connected to the heating main pipe and the heat recovery main pipe through the heating terminal distributor are located are at least two adjacent circular arc depressions.

Compared with prior art, the beneficial effect of the present invention is:

(1) Double-terminal air-conditioning system, switching operation in winter and summer, meeting the conditions of air-conditioning cooling in summer and heating in winter at the same time.

(2) Refrigerant is directly injected into the floor heating pipe without secondary heat medium, reducing energy consumption and energy loss in transportation, lowering condensation temperature, and improving energy efficiency of the system.

(3) The heating pipeline circuit is shorter, which reduces resistance and energy consumption.

(4) Add an aluminum foil layer and a phase change heat storage material to enhance heat transfer and improve the uniformity of heat supply. The heat storage of the phase change heat storage material provides heat for defrosting. While ensuring indoor thermal comfort, it solves the problem of air source heat pump Running defrost problems in winter.

(5) Intelligently optimize and control the operation of the system to meet indoor comfort and reduce system energy consumption.

(6) The air source heat pump system is adopted, and there is no risk of leakage of harmful, toxic, flammable and explosive gases. Compared with traditional floor heating, it has higher safety.

(7) It can be produced in a modular scale, and can be spliced and installed on site to reduce the difficulty of construction.

(8) Reduce the thickness of the floor and increase the effective floor height.

Description of drawings

Fig. 1 is a schematic structural diagram of a double-end air source heat pump system with a phase change heat storage material floor radiant heating according to the present invention;

Fig. 2 is a schematic structural view of the floor radiant heating terminal device in the present invention;

Fig. 3 is a schematic cross-sectional view of the floor radiant heating terminal device shown in Fig. 2 .

In the picture:

1-air source heat pump outdoor unit, 2-controller, 3-regulating control valve, 4-distributor, 5-floor radiant heating terminal device, 6-air conditioning cooling terminal device, 7-heating main pipe, 8-heating Terminal distributor, 9-branch pipe, 10-heat recovery dry pipe, 11-modular phase change heat storage material, 12-floor, 13-aluminum foil layer, 14-insulation material, 15-moisture-proof layer, 16 floor slab.

detailed description

The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, and the described specific embodiments are only for explaining the present invention, and are not intended to limit the present invention.

As shown in Fig. 1, a double-terminal air source heat pump system with phase change heat storage material floor radiation heating in the present invention includes an air source heat pump outdoor unit 1, an air conditioner cooling terminal device 6, a controller 2 and a 16 and the floor radiant heating terminal device 5 between the floor 12; One end of the end distributor 8 is connected to the heat supply main pipe 7, and the other end of the heating end distributor 8 is connected to the heat recovery main pipe 10. As shown in FIG. 3, between the floor 16 and the floor 12, from the floor 16 From the upper surface to the lower surface of the floor 12, a moisture-proof layer 15, an insulating material 14 and an aluminum foil layer 13 are successively laid, and a plurality of phase change heat storage units are arranged between the insulating material 14 and the aluminum foil layer 13, as shown in FIG. 3 As shown, each phase change thermal storage unit includes a groove arranged on the upper surface of the heat insulating material 14, and the aluminum foil layer 13 is provided with a downward arc recess at the groove, and the arc recess and the groove In the same direction, a section of branch pipe 9 is laid in the circular arc depression. The pipe section adjacent to the two arc depressions is an elbow (according to the length of the branch pipe, the coil formed by the branch pipe may occupy two or more adjacent arc grooves); the arc The radius and depth of the depression are the same as the outer diameter of the branch pipe laid therein. The circular arc depression where a section of branch pipe 9 connected to the heat supply main pipe 7 and the heat recovery main pipe 10 through the heating end distributor 8 is an adjacent circular arc depression. The grooves are filled with modular phase-change heat storage materials 11. The so-called modular phase-change heat storage materials are phase-change heat storage materials whose shape and size are designed in batches according to the shape and size of the grooves. It can be filled directly on site.

As shown in Figure 1, the inlet and outlet of the heating terminal distributor 8, the inlet and outlet of the air-conditioning cooling terminal device 6, and the inlet and outlet of the air source heat pump outdoor unit are respectively Connection via branch pipe 4. The connecting pipes between the above-mentioned components are filled with refrigerant, and the pipes of the air-source heat pump outdoor unit 1 , the air-conditioning and cooling terminal device 6 , and the floor radiation heating terminal device 5 are all equipped with regulating control valves.

The working process of the double-end air source heat pump system with phase change heat storage material floor radiation heating of the present invention is:

In summer working conditions, the air source heat pump in the air source heat pump outdoor unit is switched to the cooling state through the controller 2, and the low-temperature liquid refrigerant produced by the air source heat pump outdoor unit 1 is set in the outdoor unit of the air source heat pump. The adjustment control valve 3 and the branch pipe 4 between the unit 1 and the cooling terminal device 6 enter the cooling terminal device 6 to exchange heat with the indoor air. The refrigerant in the pipeline evaporates into gas after absorbing heat, and the refrigerant gas passes through The outlet regulating control valve 3 and diverter 4 of the indoor unit 6 flow to the outside, and then enter the air source after passing through the regulating valve control valve 3 disposed between the cooling terminal device 6 and the air source heat pump outdoor unit 1 The heat pump outdoor unit 1 exchanges heat with the outdoor air;

In winter heating conditions, the air source heat pump in the air source heat pump outdoor unit is switched to the heating state through the controller 2, and the high-temperature gaseous refrigerant produced by the air source heat pump outdoor unit 1 is set in the air source The adjustment control valve 3 and the diverter 4 between the heat pump outdoor unit 1 and the radiant floor heating terminal device 5 enter the heating main pipe 7 of the radiant floor heating terminal device 5 , and pass through the heating terminal distributor 8 The regulating control valve 3 at the inlet enters the heating terminal distributor 8, and is sent from the heating terminal distributor 8 to the main pipe 9 for heat release. The refrigerant in the pipeline condenses into a liquid after releasing heat, and the refrigerant liquid is distributed at the heating terminal. The regulating control valve 3 at the outlet of the device 8 enters the heat recovery main pipe 10, and returns to the The air source heat pump outdoor unit 1 exchanges heat with outdoor air.

Since the end of the floor radiant heating of the present invention adopts the direct condensation type, and by adding an aluminum foil layer and a phase-change heat storage material, the heating temperature is relatively uniform, and there is no need to add other heat sources or defrosting devices, and the phase-change heat storage is used to provide heat for defrosting , to solve the problem of defrosting while ensuring indoor thermal comfort.

The floor radiant heating terminal device in the present invention can be produced on a modular scale, and can be directly spliced and installed on site according to indoor load requirements, reducing the difficulty of construction and maintenance, and making it easier to popularize and implement.

Remote optimization control can be used to open and adjust the heating or cooling mode of the system in advance to ensure the comfort of personnel while reducing energy consumption.

Although the present invention has been described above in conjunction with the drawings, the present invention is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative, rather than restrictive. Under the inspiration, many modifications can be made without departing from the gist of the present invention, and these all belong to the protection of the present invention.

Claims (3)

1. with double; two end air source heat pump systems for phase change heat storage material flooring radiation heating, including air source heat pump outdoor unit (1), controller (2), cooling end equipment (6) and flooring radiation heating end equipment (5)；Described flooring radiation heating end equipment (5) includes heating end allotter (8), heat supply main (7) and backheat main (10), one end of described heating end allotter (8) is connected with heat supply main (7), the other end of described heating end allotter (8) is connected with backheat main (10), it is characterised in that:

Between floor (16) and floor (12), damp-proof layer (15) it is equipped with successively to floor (12) lower surface from floor (16) upper surface, insulation material (14) and aluminium foil layer (13), multiple phase-transition heat-storage unit it is provided with between described insulation material (14) and described aluminium foil layer (13), each phase-transition heat-storage unit includes the groove being arranged on insulation material (14) upper surface, described aluminium foil layer (13) is equipped with downward arc depression being positioned at groove, described arc depression is consistent with the trend of groove, one section of arm (9) it is equipped with in a plurality of adjacent arc depression, the two ends of this section of arm (9) are connected with described heat supply main (7) and backheat main (10) by described heating end allotter (8), this section of arm (9) pipeline section between adjacent two arc depressions is bend pipe；Modular phase change heat storage material (11) it is filled with in described groove；

It is connected by branch pipe (4) respectively between the import and export of described heating end allotter (8) and import and export and the import and export of described air source heat pump outdoor unit of described air-conditioning cooling end；

Be filled with cold-producing medium in connection pipeline between above-mentioned each device, described air source heat pump outdoor unit (1), cooling end equipment (6), flooring radiation heating end equipment (5) pipeline on be equipped with adjusting control valve。

2. according to claim 1 a kind of with phase change heat storage material flooring radiation heating double; two end air source heat pump systems, it is characterised in that the radius of described arc depression and the degree of depth are all identical with the external diameter of the arm wherein laid。

3. according to claim 1 a kind of with phase change heat storage material flooring radiation heating double; two end air source heat pump systems, it is characterized in that, the arc depression at one section of arm (9) place being connected by described heating end allotter (8) and heat supply main (7) and backheat main (10) is at least adjacent two arc depression。