CN215676605U - Heat pump system of heat pipe combined type heat exchanger - Google Patents
Heat pump system of heat pipe combined type heat exchanger Download PDFInfo
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- CN215676605U CN215676605U CN202122059019.1U CN202122059019U CN215676605U CN 215676605 U CN215676605 U CN 215676605U CN 202122059019 U CN202122059019 U CN 202122059019U CN 215676605 U CN215676605 U CN 215676605U
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Abstract
The utility model discloses a heat pump system of a heat pipe composite heat exchanger, which comprises a compressor, a four-way valve, an indoor heat exchanger, a plurality of heat pipe composite heat exchangers distributed in parallel, a throttling device and a stop valve, wherein the compressor is connected with the four-way valve; the compressor, the indoor heat exchanger, the throttling device and the heat pipe combined type heat exchanger form a heat pump system. The heat pipe composite heat exchanger comprises a common outdoor heat exchanger and a defrosting heat pipe heat exchanger; the defrosting heat pipe heat exchanger comprises a liquid collecting pipe, a supercooling pipe, a U-shaped heat pipe and a stop valve; the middle of the outdoor heat exchanger is embedded with a U-shaped heat pipe, the lower end of the U-shaped heat pipe is communicated with a liquid collecting pipe through a stop valve, and a supercooling pipe is arranged in the liquid collecting pipe; the outdoor heat exchanger is filled with gaseous refrigerant, and the defrosting heat pipe heat exchanger is filled with second refrigerant. The utility model effectively reduces the energy loss of the refrigerant in the outdoor heat exchanger caused by mode switching, and improves the efficiency and the operation safety of the whole heat pump system.
Description
Technical Field
The utility model belongs to the heating field of civil buildings, and particularly relates to a heat pipe combined type heat exchanger and a heat pump system thereof.
Background
The air source heat pump is a very effective alternative scheme in promoting the clean heating in winter in northern areas of China, reducing coal pollution and improving air quality. The heat pump can refrigerate in summer and provide heat in winter, so that the heat pump is convenient to operate and widely used. The heat pump can be used for refrigerating in summer, and when the heat pump is used for heating in winter, particularly in low-temperature and high-humidity areas, the frosting of the heat pump outdoor heat exchanger is a non-negligible problem.
At present, a reverse circulation defrosting mode is generally adopted by a household small air source heat pump, heat supply is stopped by switching a four-way reversing valve, and defrosting are realized at the cost of sacrificing part of useful energy. However, for large and medium air source heat pumps, the flexibility of the heating capacity along with the adjustment of the load is not high, the heat inertia of the system is too large, the mixed heat loss of cold and hot fluids cannot be ignored, and the traditional defrosting method adopting four-way valve reversing cannot be suitable for the large and medium air source heat pumps.
Meanwhile, in a heating system, working medium liquid is higher in temperature when flowing out of a condenser, and outdoor air temperature is always lower in a heating period, wherein a natural cold source which is rich and can be freely utilized is stored. Therefore, the huge temperature difference between the high-pressure working medium liquid and the outdoor air is reasonably utilized, so that the working medium liquid generates large supercooling before entering the expansion device, the working medium liquid supercooling is combined with the evaporator defrosting, the energy loss of the heat pump system can be further effectively reduced, and the energy efficiency level and the stability of the whole heat pump system are improved.
Patent CN 205079308U proposes a heat pump system for heating that uses natural cold source of atmosphere to increase the supercooling degree of working medium liquid, and the system can use natural cold source of atmosphere to increase the supercooling degree of liquid and use the supercooling heat of liquid to defrost the evaporator. However, the following problems are found in the system in use: 1. the system has more valves, and has larger influence on the stability of the system operation; 2. the defrosting process valve is switched to aim at the liquid of the main path, the same heat exchanger is in the role alternation of the condenser and the evaporator, the internal refrigerant is repeatedly mixed and redistributed, and new balance is established.
The utility model further provides an improvement measure on the basis of the patent CN 205079308U, and adopts a remarkably different technical route. The heat pipe composite heat exchanger is used as an outdoor heat exchanger, so that the heat of the main path is extracted without flowing a refrigerant, the defrosting of the outdoor heat exchanger is realized under the condition of not stopping heat supply, the stability of a system is ensured, and the energy loss of the system is reduced.
In summary, in order to solve the above-mentioned problem of the air source heat pump, that is, during heating in winter, the conventional defrosting has a great influence on the stability and thermal comfort of the system, further improvement and innovation are needed for the existing heat pump heat exchanger and the defrosting mode of the heat pump system.
SUMMERY OF THE UTILITY MODEL
The utility model provides a heat pipe composite heat exchanger and a heat pump system thereof, which are used for solving the problems of poor heat supply comfort, poor system stability and the like of the existing heat pump; in the system, when the outdoor heat exchanger 13 is not frosted, the system is normally operated; when the outdoor heat exchanger 13 frosts, the supercooling pipe 15 in the liquid collecting pipe 14 supercools and heats the second refrigerant, and the second refrigerant enters the U-shaped heat pipe 16 by controlling the stop valve 12, so that the outdoor heat exchanger 13 which stops running after frosting is alternately defrosted without stopping heat supply; the system realizes the supercooling defrosting of the heat pipe composite heat exchanger 4 on the premise of not stopping heat supply, effectively reduces the energy loss of the refrigerant in the outdoor heat exchanger 13 caused by mode switching, and improves the efficiency and the operation safety of the whole heat pump system.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a heat pipe composite heat exchanger and its heat pump system, including the compressor 1, four-way valve 2, indoor heat exchanger 3, multiple heat pipe composite heat exchangers 4 distributed in parallel, throttling set 5 and stop valve (6, 7, 8, 9, 10); the outlet of the compressor 1 is connected with a four-way valve 2, the four-way valve 2 is connected with the inlet of an indoor heat exchanger 3, the outlet of the indoor heat exchanger 3 is respectively connected with the inlets of a plurality of throttling devices 5 distributed in parallel and a heat pipe composite heat exchanger 4 through different stop valves (6, 7, 8-2, 9-2 and 10-2), the outlet of the heat pipe composite heat exchanger 4 is connected with the four-way valve 2 through the stop valves (8-1, 9-1 and 10-1), and the four-way valve 2 is connected with the inlet of the compressor 1; the compressor 1, the indoor heat exchanger 3, the heat pipe composite heat exchanger 4 and the throttling device 5 form a heat pump system;
the heat pipe composite heat exchanger 4 comprises a common outdoor heat exchanger 13 and a defrosting heat pipe heat exchanger 11; the defrosting heat pipe heat exchanger 11 comprises a liquid collecting pipe 14, a supercooling pipe 15, a U-shaped heat pipe 16 and a stop valve 12; the middle of the outdoor heat exchanger 13 is embedded with a U-shaped heat pipe 16, the lower end of the U-shaped heat pipe 16 is communicated with a liquid collecting pipe 14 through a stop valve 12, and a supercooling pipe 15 is arranged in the liquid collecting pipe 14. The indoor heat exchanger 3 is connected with an inlet of a supercooling pipe 15 in the liquid collecting pipe 14 through a stop valve 7, an outlet of the supercooling pipe 15 is connected with a pipeline where the throttling device 5 is located, an outlet of the throttling device 5 is connected with an inlet of the outdoor heat exchanger 13, and an outlet of the outdoor heat exchanger 13 is connected with the four-way valve 2; the outdoor heat exchanger 13 is filled with a gaseous refrigerant, and the defrosting heat pipe heat exchanger 11 is filled with a second refrigerant.
Preferably, the gas refrigerant is one of R134a, R22, R410A, R1234yf and R1234ze Freon working media; the second refrigerant is one of Freon, natural working medium solution or water solution and the like.
Preferably, the U-shaped heat pipe 16, the supercooling pipe 15 and the liquid collecting pipe 14 are all made of copper, aluminum, stainless steel and cast iron metal materials; wherein, the heat collecting pipe 14 is covered with a heat insulating layer.
The utility model provides a heat pipe composite heat exchanger and a heat pump system thereof, comprising a compressor 1, a four-way valve 2, an indoor heat exchanger 3, a plurality of heat pipe composite heat exchangers 4 distributed in parallel, a throttling device 5 and stop valves (6, 7, 8, 9 and 10). Its main utility model point includes: on one hand, the system realizes the rotation supercooling defrosting of the heat pipe composite heat exchanger 4 on the premise of not stopping heat supply. By switching the stop valve 12, the heat released by supercooling the supercooling pipe 15 in the heat collecting pipe 14 heats the second refrigerant, so that the frosted outdoor heat exchanger 13 is sequentially defrosted by the heat released by the second refrigerant; the advantage of this design is that defrosting is performed without compromising the thermal comfort of the room and without the need for redundant equipment. On the other hand, the heat pipe composite heat exchanger 4 is adopted to replace the traditional heat exchanger, and when the system normally operates, the refrigerant flows into the outdoor heat exchanger 13 to absorb heat; when the system is switched to the defrosting mode, the refrigerant flows into the supercooling pipe 15 in the heat collecting pipe 14 to be supercooled and release heat, so that the second refrigerant in the heat collecting pipe 14 is heated, and then enters the U-shaped heat pipe 16 through the stop valve 12 to release heat and defrost the outdoor heat exchanger 13.
Drawings
The utility model is further described below with reference to the accompanying drawings and examples.
FIG. 1 is a schematic structural diagram of a heat pipe composite heat exchanger and a heat pump system thereof according to the present invention;
FIG. 2 is a three-dimensional view of the heat pipe compound heat exchanger according to the present invention;
FIG. 3 is a schematic diagram of a parallel structure of 4 heat pipe compound heat exchangers of a heat pipe compound heat exchanger and a heat pump system thereof according to the present invention.
Detailed Description
The utility model is further described with reference to the following figures and detailed description:
example 1:
as shown in fig. 1, the present invention provides a heat pipe compound heat exchanger and a heat pump system thereof, comprising a compressor 1, a four-way valve 2, an indoor heat exchanger 3, three heat pipe compound heat exchangers 4 distributed in parallel, a throttling device 5 and stop valves (6, 7, 8, 9, 10); the heat pipe composite heat exchanger 4 comprises a common outdoor heat exchanger 13 and a defrosting heat pipe heat exchanger 11, wherein the defrosting heat pipe heat exchanger 11 comprises a liquid collecting pipe 14, a supercooling pipe 15, a U-shaped heat pipe 16 and a stop valve 12; the U-shaped heat pipe 16 is embedded in the outdoor heat exchanger 13 and is communicated with the liquid collecting pipe 14 through the stop valve 12 at the lower end thereof, and the supercooling pipe 15 is arranged in the liquid collecting pipe 14.
Wherein, the outlet of the compressor 1 is connected with a four-way valve 2, the four-way valve 2 is connected with the inlet of an indoor heat exchanger 3, the outlet of the indoor heat exchanger 3 is respectively connected with three throttling devices (5-1, 5-2 and 5-3) which are distributed in parallel through a stop valve 6 and stop valves (8-2, 9-2 and 10-2), the outlet of the indoor heat exchanger 3 is respectively connected with the inlets of supercooling pipes (15-1, 15-2 and 15-3) in three liquid collecting pipes (14-1, 14-2 and 14-3) which are distributed in parallel through a stop valve 7, the outlets of the supercooling pipes (15-1, 15-2 and 15-3) are connected with the pipeline where the throttling device 5 is located, and the outlets of the throttling devices (5-1, 5-2 and 5-3) are respectively connected with an outdoor heat exchanger (13-1, 5-2 and 5-3), 13-2, 13-3), the outlets of the outdoor heat exchangers (13-1, 13-2, 13-3) are respectively connected with a four-way valve 2 through stop valves (8-1, 9-1, 10-1), and the four-way valve 2 is connected with the inlet of a compressor 1; the compressor 1, the indoor heat exchanger 3, the heat pipe composite heat exchanger 4 and the throttling device 5 form a heat pump system, and a gaseous refrigerant is injected into the compressor 1, wherein the gaseous refrigerant is one of R134a, R22, R410A, R1234yf and R1234ze Freon working media; and a second refrigerant is filled in the defrosting heat pipe heat exchanger 11, and the second refrigerant is one of Freon, natural working medium solution or water solution and the like.
The U-shaped heat pipe 16, the supercooling pipe 15 and the liquid collecting pipe 14 are made of metal materials such as copper and aluminum, or common metal materials such as stainless steel and cast iron can be used, and a heat insulation layer covers the liquid collecting pipe 14.
The working process is as follows: when refrigerating in summer, the stop valves (6, 8-1, 8-2, 9-1, 9-2, 10-1 and 10-2) are opened, and the rest are closed. After being compressed into high-temperature and high-pressure gas refrigerant by the compressor 1, the refrigerant respectively enters the outdoor heat exchanger 13 through the four-way valve 2 and the stop valves (8-1, 9-1 and 10-1) to be condensed and released heat, the refrigerant condensed into low-temperature and high-pressure gas is throttled into low-temperature and low-pressure refrigerant by the throttling device 5, then enters the indoor heat exchanger 3 through the stop valves (8-2, 9-2 and 10-2) and the stop valve 6, after the indoor heat exchanger 3 absorbs heat and refrigerates, the high-temperature and low-pressure refrigerant returns to the compressor 1 through the four-way valve 2 to be compressed again.
When heating in winter, the stop valves (7, 8-1, 8-2, 9-1, 9-2, 10-1 and 10-2) are opened, and the rest are closed. After being compressed into high-temperature and high-pressure gas refrigerant by a compressor 1, the refrigerant enters an indoor heat exchanger 3 through a four-way valve 2 to be condensed, discharged and heated, the refrigerant condensed into low-temperature and high-pressure gas enters a supercooling pipe 15 in a liquid collecting pipe 14 after passing through a stop valve 7, then enters a throttling device 5 through stop valves (8-2, 9-2 and 10-2) to be throttled into low-temperature and low-pressure refrigerant, then enters an outdoor heat exchanger 13 to absorb heat, and the refrigerant which absorbs heat into high-temperature and low-pressure gas returns to the compressor 1 through the stop valves (8-1, 9-1 and 10-1) and the four-way valve 2 to be compressed again.
When defrosting is carried out in winter, firstly, the outdoor heat exchanger 13-1 is defrosted, at the moment, the stop valves (7, 9-1, 9-2, 10-1, 10-2 and 12-1) are opened, the rest stop valves are closed, and the outdoor heat exchanger 13-1 stops operating. After being compressed into a high-temperature and high-pressure gas refrigerant by a compressor 1, the refrigerant enters an indoor heat exchanger 3 through a four-way valve 2 to be condensed, discharged and heated, the refrigerant condensed into low-temperature and high-pressure gas passes through a stop valve 7 and then respectively enters a supercooling pipe 15 in a liquid collecting pipe 14, a second refrigerant in a heat collecting pipe 14-1 absorbs heat discharged by the supercooling pipe 15-1, the heated second refrigerant is heated and rises into a U-shaped heat pipe through the stop valve 12-1 to perform heat discharging and defrosting on an outdoor heat exchanger 13-1 which stops running, the second refrigerant after heat discharging falls into the heat collecting pipe 14-1 to absorb heat again, and the operation is repeated until defrosting is completed; meanwhile, the refrigerant after supercooling and heat release enters throttling devices (5-2 and 5-3) through stop valves (9-2 and 10-2) respectively to be throttled into low-temperature and low-pressure refrigerant, then enters outdoor heat exchangers (13-2 and 13-3) to absorb heat, and returns to the compressor 1 through the stop valves (9-1 and 10-1) and the four-way valve 2 to be compressed after absorbing heat into high-temperature and low-pressure refrigerant. After the outdoor heat exchanger 13-1 is defrosted, the stop valves (9-1, 9-2, 10-1 and 10-2) are closed in sequence similarly, the stop valves (12-2 and 12-3) are opened to defrost the outdoor heat exchangers (13-2 and 13-3) in sequence, and a defrosting cycle is completed after the three outdoor heat exchangers (13-1, 13-2 and 13-3) are defrosted in sequence.
Example 2:
fig. 3 is a schematic diagram of a parallel structure of four heat pipe compound heat exchangers distributed in parallel according to the heat pipe compound heat exchanger and the heat pump system thereof provided by the present invention. In the scheme, the low-temperature high-pressure refrigerant which is discharged out of the indoor heat exchanger sequentially defrosts the outdoor heat exchanger through four different supercooling pipes.
The above description is only a preferred embodiment of the present invention, and it should not be understood that the scope of the present invention is limited thereby, and it should be understood that various other changes and modifications of the technical solution and the technical concept of the present invention by those skilled in the art should fall within the scope of the present invention.
Claims (5)
1. A heat pump system of a heat pipe composite heat exchanger is characterized by comprising a compressor (1), a four-way valve (2), an indoor heat exchanger (3), a plurality of heat pipe composite heat exchangers (4) distributed in parallel, a throttling device (5) and a stop valve; the outlet of the compressor (1) is connected with the four-way valve (2), the four-way valve (2) is connected with the inlet of the indoor heat exchanger (3), the outlet of the indoor heat exchanger (3) is respectively connected with the inlets of the plurality of throttling devices (5) which are distributed in parallel and the heat pipe composite heat exchanger (4) through stop valves, the outlet of the heat pipe composite heat exchanger (4) is connected with the four-way valve (2) through the stop valves, and the four-way valve (2) is connected with the inlet of the compressor (1); the compressor (1), the indoor heat exchanger (3), the heat pipe composite heat exchanger (4) and the throttling device (5) form a heat pump system;
the heat pipe composite heat exchanger (4) comprises an outdoor heat exchanger (13) and a defrosting heat pipe heat exchanger (11); the defrosting heat pipe heat exchanger (11) comprises a liquid collecting pipe (14), a supercooling pipe (15), a U-shaped heat pipe (16) and a stop valve (12); a U-shaped heat pipe (16) is embedded in the middle of the outdoor heat exchanger (13), the lower end of the U-shaped heat pipe (16) is communicated with a liquid collecting pipe (14) through a stop valve (12), and a supercooling pipe (15) is arranged in the liquid collecting pipe (14); the indoor heat exchanger (3) is connected with an inlet of a supercooling pipe (15) in the liquid collecting pipe (14) through a stop valve, an outlet of the supercooling pipe (15) is connected with a pipeline where the throttling device (5) is located, an outlet of the throttling device (5) is connected with an inlet of the outdoor heat exchanger (13), and an outlet of the outdoor heat exchanger (13) is connected with the four-way valve (2); the outdoor heat exchanger (13) is filled with a gaseous refrigerant, and the defrosting heat pipe heat exchanger (11) is filled with a second refrigerant.
2. The heat pump system of a heat pipe composite heat exchanger as claimed in claim 1, wherein the subcooling pipe (15) is installed in the header pipe (14), and the header pipe (14) is connected to the U-shaped heat pipe (16) through the shut-off valve (12); in the defrosting mode, the second refrigerant in the liquid collecting pipe (14) is heated through the supercooling pipe (15), and enters the U-shaped heat pipe (16) through the stop valve (12) to perform heat release and defrosting on the outdoor heat exchanger (13).
3. The heat pump system of a heat pipe compound heat exchanger as claimed in claim 1, wherein the outdoor heat exchanger (13) embedded with the U-shaped heat pipe (16) is inclined at a certain angle when the heat pipe compound heat exchanger (4) is installed.
4. The heat pump system of a heat pipe composite heat exchanger as claimed in claim 1, wherein the U-shaped heat pipe (16), the supercooling pipe (15) and the header pipe (14) are made of copper, aluminum, stainless steel or cast iron metal material.
5. The heat pump system of a heat pipe compound heat exchanger as claimed in claim 1, wherein the heat collecting pipe (14) is covered with a heat insulating layer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122059019.1U CN215676605U (en) | 2021-08-30 | 2021-08-30 | Heat pump system of heat pipe combined type heat exchanger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122059019.1U CN215676605U (en) | 2021-08-30 | 2021-08-30 | Heat pump system of heat pipe combined type heat exchanger |
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| CN215676605U true CN215676605U (en) | 2022-01-28 |
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| CN202122059019.1U Active CN215676605U (en) | 2021-08-30 | 2021-08-30 | Heat pump system of heat pipe combined type heat exchanger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113701534A (en) * | 2021-08-30 | 2021-11-26 | 北京工业大学 | Heat pipe combined type heat exchanger and heat pump system thereof |
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- 2021-08-30 CN CN202122059019.1U patent/CN215676605U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113701534A (en) * | 2021-08-30 | 2021-11-26 | 北京工业大学 | Heat pipe combined type heat exchanger and heat pump system thereof |
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