CN218442859U

CN218442859U - Heat pump system with sleeve finned heat exchanger

Info

Publication number: CN218442859U
Application number: CN202221896213.3U
Authority: CN
Inventors: 马国远; 宮悦轩; 许树学; 李富平
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology
Priority date: 2022-07-21
Filing date: 2022-07-21
Publication date: 2023-02-03
Anticipated expiration: 2032-07-21

Abstract

The utility model discloses a take sleeve pipe fin type heat exchanger's heat pump system, by a plurality of compressor, cross valve and throttling element, and two sleeve pipe fin type heat exchangers etc. constitute, there is the fin sleeve pipe outside of sleeve pipe fin type heat exchanger, sheathed tube intertube side and interior pipe side are working medium or liquid flow way, and be equipped with one or more working medium flow path respectively, its respective working medium flow path and compressor, cross valve and throttling element connect into independent heat pump circuit and fill annotate proper amount working medium, the liquid flow path communicates with the outside pipeline of configuration. The working medium in the heat pump system exchanges heat with water and air simultaneously, the functions of supplying heat and supplying domestic hot water are integrated into one device, the manufacturing cost and the installation space are effectively reduced, more than two heat pump loops can be formed, and the energy efficiency ratio of the heat pump under the working condition of large heat exchange temperature difference is effectively improved.

Description

Heat pump system with sleeve finned heat exchanger

Technical Field

The utility model mainly relates to a heat pump system's for building heat supply, heat supply water technical field, especially a take sleeve pipe fin type heat exchanger and heat pump system thereof belong to heat pump technical field.

Background

District heating systems are central heating networks that distribute heat from a central source to users in a unified manner, and are used to solve heat demand problems in personal, residential, commercial heating, and industrial processes. In order to save energy and reduce the temperature of regional heating once, the temperature of hot water supplied by a third generation of regional heating system widely used at present is about 90 ℃; in order to further recycle low-and-medium waste heat resources such as boiler exhaust smoke and the like to achieve the purposes of energy conservation and emission reduction, people are always researching or popularizing the fourth generation regional heating system after 21 st century, the temperature of hot water supplied by the system can be reduced to 70 ℃ or lower to 50 ℃, the heat loss of the system is greatly reduced, and the heating efficiency is improved. However, the fourth generation district heating system can only directly heat after the heating temperature is reduced, and cannot provide domestic hot water required for bathing and the like through a heat exchange mode. In recent years, driven by the "dual carbon" goal, fifth generation district heating systems have been proposed, i.e., ultra low temperature district heating systems, with water supply temperatures below 50 ℃, and even as low as 25 ℃, which can make full use of low grade heat sources that were difficult to utilize in the past, such as: solar energy, environmental heat sources, data center waste heat, process cooling water and the like. Compared to the fourth generation system, the fifth generation system is characterized as follows: 1) The water supply of the heat supply network cannot be directly used for heating, and in addition, the temperature difference between heating and hot water supply is large, and the randomness of the requirement of domestic hot water is strong, so two sets of temperature-increasing heat pumps are required to be arranged; 2) The heat supply network can refrigerate at the same time, the waste heat generated in a centralized way during refrigeration can be utilized, and the waste heat can be dissipated in a centralized way by equipment such as a cooling tower and the like. Therefore, for the fifth generation system, the advantages of energy saving, emission reduction, pipe network cost saving and the like are very obvious, and the problems caused by the obvious advantages are also more obvious, for example, when a user configures two sets of temperature increasing systems, the cost and the installation space are greatly increased, and when heating is performed in the process of preparing domestic hot water or in cold weather, the temperature rise of the heat pump is large, namely the heat exchange temperature difference is large, and the energy efficiency ratio of the heat pump is seriously reduced.

In order to solve the problems of the heating heat pump of the above-mentioned district heating system, the technical proposal of the utility model is designed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the problem that exists among the above-mentioned prior art, provide a water and air simultaneously with heat pump working medium heat transfer and compact structure, energy efficiency ratio show a sleeve pipe fin formula heat exchanger and heat pump system who improves. The utility model designs a sleeve pipe fin type heat exchanger, the working medium can exchange heat with water and air at the same time, two heating systems of a heating heat pump and a life hot water heat pump can be integrated into a set of device, and the problems of high cost and large installation size caused by the separate arrangement of the heating heat pump and the life hot water heat pump are solved; the sleeve finned heat exchanger is provided with more than two working medium flow paths, and the working medium flow paths and other parts of the heat pump form more than two heat pump loops, so that the heat exchange temperature difference born by each loop is reduced, and the problem of low energy efficiency ratio of the heat pump under the working condition of large temperature rise is solved.

In order to realize the purpose of the utility model, the technical scheme of the utility model is realized through following mode:

a heat exchanger with sleeve pipe fins and a heat pump system thereof are composed of a plurality of compressors 1, four-way valves 2, throttling elements 3, two sleeve pipe fin type heat exchangers and the like; fins are arranged on the outer side of a sleeve of the sleeve fin type heat exchanger, and working medium or liquid flow passages are arranged on the inter-tube side and the inner tube side of the sleeve; the sleeve finned heat exchanger is respectively provided with one or more working medium flow paths and liquid flow paths, and each working medium or liquid flow path is converged on the inlet and outlet collecting pipes; a working medium flow path of each of the two sleeve fin type heat exchangers is connected with the compressor 1, the four-way valve 2 and the throttling element 3 through an inlet collecting pipe and an outlet collecting pipe of the two sleeve fin type heat exchangers to form an independent heat pump loop, and the heat pump loop is filled with a proper amount of working medium; the number of working medium flow paths arranged on the two sleeve tube fin type heat exchangers is the same as that of heat pump loops formed correspondingly, and the liquid flow paths are communicated with a configured liquid pipeline through an inlet collecting pipe and an outlet collecting pipe of the liquid flow paths.

The two sleeve finned heat exchangers comprise a first sleeve finned heat exchanger 4 and a second sleeve finned heat exchanger 5; the first sleeve finned heat exchanger 4 is provided with two working medium flow paths and a liquid flow path, and comprises an outer pipe 401, an inner pipe 402, an inner pipe bent pipe 403, an outer pipe bent pipe A404, an upper liquid collecting pipe 405, a lower liquid collecting pipe 414, fins 406, a first working medium flow path upper collecting pipe 407, a lower working medium flow path collecting pipe 416, a right frame 408, an upper frame 409, an outer pipe bent pipe B410, a left frame 411, a lower frame 412, a second working medium flow path lower collecting pipe 413, an upper collecting pipe 415 and the like, and the structure thereof is as follows: the outer tubes 401 are arranged into a tube array according to a certain rule, and a plurality of fins 406 are connected outside the outer tubes 401 in series; the tube array of the outer tube 401 is supported between the left frame 411 and the right frame 408 and tightly connected together; the inner pipe 402 is prefabricated into a U-shaped pipe which penetrates into the outer pipe 401 to form a sleeve, and the bent pipe B410 of the outer pipe is sleeved in the bent part of the U-shaped pipe of the inner pipe 402 in advance; an inner pipe 402 of the opening part of the U-shaped pipe penetrates through an elbow pipe A404 of the outer pipe; the outer pipe elbow A404 and the outer pipe elbow B410 connect the outer pipe 401 into a plurality of branches according to the required rules, and the branches are respectively collected in an upper collecting pipe 407 and a lower collecting pipe 416 of the first working medium flow path and an upper collecting pipe 415 and a lower collecting pipe 413 of the second working medium flow path; the inner pipe elbow 403 connects the inner pipes 402 into a plurality of branches according to the required rules and collects the branches in the liquid upper header 405 and the liquid lower header 414; upper frame 409 and upper frame 412 are connected to right frame 408 and left frame 411, respectively, and constitute a mounting frame. The composition and the structure of the second sleeve fin type heat exchanger 5 are similar or similar to those of the sleeve fin type heat exchanger 4.

In the two heat pump loops, the two heat pump loops comprise a first compressor 1A, a second compressor 1B, a first four-way valve 2A, a second four-way valve 2B, a first throttling element 3A, a second throttling element 3B, a first sleeve finned heat exchanger 4, a second sleeve finned heat exchanger 5, a distributor a6, a distributor B7, a distributor c8, a distributor d9, a fan A10, a fan B11 and the like. A fan A10 and a fan B11 are arranged on the fin sides of the first sleeve finned heat exchanger 4 and the second sleeve finned heat exchanger 5, and a first working medium flow path of the first sleeve finned heat exchanger 4 and a second working medium flow path of the second sleeve finned heat exchanger 5 are respectively connected with a first compressor 1A, a first four-way valve 2A and a first throttling element 3A to form a heat pump loop A after passing through a distributor a6 and a distributor d 9; a working medium flow path II of the first sleeve finned heat exchanger 4 and a working medium flow path I of the second sleeve finned heat exchanger 5 respectively pass through a distributor B7 and a distributor c8 and then are connected with a second compressor 1B, a second four-way valve 2B and a second throttling element 3B to form a heat pump loop B; the first and second

finned tube exchangers

4 and 5 are provided with one or two liquid flow paths, and the liquid flow paths may be the same or different.

A sleeve with sleeve fin type heat exchanger and its heat pump system, its sleeve of the finned heat exchanger of the sleeve can be the tube sleeve fin type, tube roll fin type or tube around fin type, etc. suitable for forcing the structure of convection current or natural convection current; the fins can be omitted, the outer pipe can be a single pipe which is regularly arranged and then connected into a flow path by a bent pipe, or the outer pipe can be a U-shaped pipe or an S-shaped pipe which is processed into the flow path by the bent pipe, the inner pipe arranged in the finned pipe can be a single pipe or a plurality of pipes, and the connection mode of the two ends of the inner pipe is suitable for the connection mode of the finned pipe.

The flow path arrangement of the two sleeve-pipe fin type heat exchangers can be the same or different.

A finned heat exchanger with sleeve tube and its heat pump system features that its four-way valve can be omitted, its throttle element can be throttle tube, throttle hole, throttle valve or expansion valve, and its compressor can be independent compressor or compressor cylinder with independent air sucking and exhausting functions.

An inner tube and an inter-tube flow passage of the sleeve finned heat exchanger can respectively carry liquid and working medium, and can also respectively carry the working medium and the liquid; the working medium is R134a, R410A, R32, R290 or R600A which meets the requirement of environmental protection, the fluid can be water, antifreeze or synthetic fluid, etc., the working medium used by different heat pump circuits can be the same or different, and the fluid used by different liquid flow paths can be the same or different.

In a first sleeve finned heat exchanger 4, an outer pipe 401 can be prefabricated into a U-shaped pipe, an outer pipe bent pipe B410 can be omitted, the opening part of the U-shaped pipe of an inner pipe 402 penetrates through the U-shaped pipe bending part of the outer pipe 401, and the other end of the outer pipe 401 penetrates through an outer pipe bent pipe A404.

The distributor of the finned heat exchanger with casing pipe and its heat pump system may be one assembly comprising four two-way valves or one-way valves or two three-way valves connected in the flow direction of the working medium.

For the sleeve finned heat exchanger and the heat pump system thereof, working media and water can flow through the channels between the tubes and the inner tube of the sleeve finned heat exchanger, air can flow through the fin sides, so that the working media and the water and the air can exchange heat simultaneously, two sets of temperature-increasing heat pump systems for heating and supplying domestic hot water can be integrated into one set of device, and the manufacturing cost and the installation space of the temperature-increasing heat pump can be effectively reduced; the sleeve finned heat exchanger is provided with two or more working medium flow paths, and forms more than two heat pump loops with other parts of the heat pump, each loop can be selected and matched with proper working medium and bear the total temperature rise of the heat pump together, so that the heat exchange temperature difference borne by each loop can be reduced, the energy efficiency ratio of the heat pump is effectively improved, in addition, the heat pump adjusts the number of the loops of the heat pump according to the heating requirement, namely, the heat pump needs to operate in a small single loop and a large number of loops, and the annual power consumption of the heat pump can be effectively reduced.

Drawings

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a system diagram according to an embodiment of the present invention.

Fig. 2 is a front view of a sleeve-fin heat exchanger according to an embodiment of the present invention.

Fig. 3 is a right side view of a sleeve-tube finned heat exchanger according to an embodiment of the present invention.

Fig. 4 is a left side view of a sleeve-pipe fin type heat exchanger according to a first embodiment of the present invention.

Fig. 5 is a system diagram of the second embodiment of the present invention.

Fig. 6 is a front view of a two-tube finned heat exchanger according to an embodiment of the present invention.

Fig. 7 is a right side view of a two-pipe fin heat exchanger according to an embodiment of the present invention.

Fig. 8 is a diagram of three systems according to the embodiment of the present invention.

Fig. 9 is a front view of the fin type heat exchanger with three sleeves according to the embodiment of the present invention.

Fig. 10 is a right side view of a three-tube finned heat exchanger according to an embodiment of the present invention.

Fig. 11 is a diagram of four systems according to an embodiment of the present invention.

Fig. 12 is a front view of a four-tube finned heat exchanger according to an embodiment of the present invention.

Fig. 13 is a right side view of a four-tube finned heat exchanger according to an embodiment of the present invention.

In the figure: 1A, 1B-compressor, 2A, 2B-four-way valve, 3A, 3B-throttling element, 4-fluid a sleeve fin heat exchanger, 5-fluid B sleeve fin heat exchanger, 6-distributor a, 7-distributor B, 8-distributor c, 9-distributor d, 10-fan a, 11-fan B.

The first tube-fin heat exchanger 4 for fluid a is constructed as follows: 401-outer tube, 402-inner tube, 403-inner tube elbow, 404-outer tube elbow a, 405-liquid upper header, 406-fin, 407-working medium flow path one upper header, 408-right frame, 409-upper frame, 410-outer tube elbow B, 411-left frame, 412-lower frame, 413-working medium flow path two lower header, 414-liquid lower header, 415-working medium flow path two upper header, 416-working medium flow path one lower header, 417-liquid upper header, 418-liquid middle lower header.

The second tube fin heat exchanger 5 of fluid B is constructed as follows: 501-outer pipe, 502-inner pipe, 503-inner pipe elbow, 504-outer pipe elbow a, 505-liquid upper header, 506-fin, 507-working medium flow path one upper header, 508-right frame, 509-upper frame, 510-outer pipe elbow B, 511-left frame, 512-lower frame, 513-working medium flow path two lower header, 514-liquid lower header, 515-working medium flow path two upper header, 516-working medium flow path one lower header, 517-liquid upper header, 518-liquid middle lower header.

The valve formed by the distributor a6 is as follows: 61-upper valve a, 62-middle upper valve a, 63-middle lower valve a, 64-lower valve a.

The valve constituted by the distributor b7 is as follows: 71-upper valve b, 72-middle upper valve b, 73-middle lower valve b, 74-lower valve b.

The distributor c8 constitutes a valve as follows: 81-upper valve c, 82-middle upper valve c, 83-middle lower valve c, 84-lower valve c.

The valve formed by the distributor d9 is as follows: 91-upper valve d, 92-upper valve d, 93-middle lower valve d, 94-lower valve d.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

Example one

Referring to fig. 1, the embodiment is a heat pump system using a working medium double-flow-path, inner pipe liquid single-flow-path casing finned heat exchanger. The heat pump system comprises

compressors

1A and 1B, four-

way valves

2A and 2B,

throttling elements

3A and 3B, a fluid A sleeve finned heat exchanger 4, a fluid B sleeve finned heat exchanger 5, a distributor a6, a distributor B7, a distributor c8, a distributor d9, a fan A10, a fan B11 and the like. The sleeve finned

heat exchangers

4 and 5 are respectively composed of a working medium flow path I, a working medium flow path II and a liquid flow path, and a fan A10 and a fan B11 are arranged on the fin side; the inner pipe of the sleeve forms a liquid flow path which is respectively connected with a pipeline of fluid A and a pipeline of fluid B, wherein the fluid A can be indoor domestic hot water, and the fluid B can be supplied heat source water and respectively flows in the inner pipes of the

heat exchangers

4 and 5; the fan A10 and the fan B11 drive indoor air and indoor exhaust air or outdoor air to pass through the fin side of the heat exchanger 4; two working medium flow paths are formed between the outer pipe and the inner pipe of the sleeve, an upper working medium flow path I and a lower working medium flow path II are formed between the outer pipe and the inner pipe of the sleeve, the first working medium flow path of the heat exchanger 4 and the second working medium flow path of the heat exchanger 5 are respectively connected with the compressor 1A, the four-way valve 2A and the throttling element 3A into a heat pump loop A after passing through a distributor a6 and a distributor d9, and the working medium of the heat pump loop A can be R134a; and a working medium flow path II of the heat exchanger 4 and a working medium flow path I of the heat exchanger 5 are respectively connected with the compressor 1B, the four-way valve 2B and the throttling element 3B into a heat pump loop B after passing through a distributor B7 and a distributor c8, and the working medium can be R410A or R32.

Referring to fig. 2, 3 and 4, the fluid a double-pipe fin heat exchanger 4 is composed of an outer pipe 401, an inner pipe 402, an inner pipe elbow 403, an outer pipe elbow a404, a liquid upper header 405 and a lower header 414, fins 406, a first working medium flow path upper header 407 and a lower header 416, a right frame 408, an upper frame 409, an outer pipe elbow B410, a left frame 411, a lower frame 412, a second working medium flow path lower header 413 and an upper header 415, and the like, and is structured as follows: the outer tubes 401 are arranged into a tube array according to a certain rule, a plurality of fins 406 are arranged outside the outer tubes 401 in a stringing mode, and the tube array of the outer tubes 401 is supported between the left frame 411 and the right frame 408 and is tightly connected together; an inner pipe 402 is prefabricated into a U-shaped pipe and penetrates into an outer pipe 401 to form a sleeve, an outer pipe bent pipe B410 is sleeved into a U-shaped pipe bending part of the inner pipe 402 in advance, and the inner pipe 402 at the opening part of the U-shaped pipe penetrates through an outer pipe bent pipe A404; the outer pipe bent pipe A404 and the bent pipe B410 connect the outer pipe 401 into a plurality of branches according to the required rules and collect the branches in an upper collecting pipe 407 and a lower collecting pipe 416 of a first working medium flow path and an upper collecting pipe 415 and a lower collecting pipe 413 of a second working medium flow path respectively, and the inner pipe bent pipe 403 connects the inner pipe 402 into a plurality of branches according to the required rules and collect the branches in an upper liquid collecting pipe 405 and a lower liquid collecting pipe 414; upper frame 409 and upper frame 412 are connected to right frame 408 and left frame 411, respectively, and constitute a mounting frame.

The composition and the structure of the fluid B double-pipe finned heat exchanger 5 are similar or similar to the fluid A double-pipe finned heat exchanger 4.

The distributor a6 comprises an upper valve a61, a middle upper valve a62, a middle lower valve a63, a lower valve a64 and the like, and the connection modes are as follows: one ends of the upper valve a61 and the middle upper valve a62 are connected in parallel and then connected with an upper collecting pipe 407 of the working medium flow path, and one ends of the middle lower valve a63 and the lower valve a64 are connected in parallel and then connected with a lower collecting pipe 416 of the working medium flow path; the other end of the upper valve a61 and the middle and lower valve a63 are connected in parallel and then connected to the right side pipe of the four-way valve 2A, and the other end of the middle and lower valve a62 and the other end of the lower valve a64 are connected in parallel and then connected to one end of the throttling element 3A.

The distributor b7 comprises an upper valve b71, a middle upper valve b72, a middle lower valve b73, a lower valve b74 and the like, and the connection modes are as follows: one end of the upper valve b71 and one end of the middle upper valve b72 are connected in parallel and then connected with the working medium flow path two upper collecting pipe 415, and one end of the middle lower valve b73 and one end of the lower valve b74 are connected in parallel and then connected with the working medium flow path two lower collecting pipe 413; the other end of the upper valve B71 and the other end of the middle and lower valve B73 are connected in parallel and then connected to the left pipe of the four-way valve 2B, and the other end of the middle and upper valve B72 and the other end of the lower valve B74 are connected in parallel and then connected to one end of the throttling element 3B.

The distributor c8 comprises an upper valve c81, a middle upper valve c82, a middle lower valve c83, a lower valve c84 and the like, and the connection modes are as follows: one ends of the upper valve c81 and the middle upper valve c82 are connected in parallel and then connected with an upper collecting pipe 507 of the working medium flow path, and one ends of the middle lower valve c83 and the lower valve c84 are connected in parallel and then connected with a lower collecting pipe 516 of the working medium flow path; the other end of the upper valve c81 and the middle and lower valves c83 are connected in parallel and then connected to the other end of the throttle element 3B, and the other end of the upper valve c82 and the other end of the lower valve c84 are connected in parallel and then connected to the right pipe of the four-way valve 2B.

The distributor b9 comprises an upper valve b91, a middle upper valve b92, a middle lower valve b93, a lower valve b94 and the like, and the connection modes are as follows: one end of the upper valve b91 and one end of the middle upper valve b92 are connected in parallel and then connected with the working medium flow path two upper collecting pipe 515, and one end of the middle lower valve b93 and one end of the lower valve b94 are connected in parallel and then connected with the working medium flow path two lower collecting pipe 513; the other end of the upper valve B91 is connected to the other end of the throttling element 3A in parallel with the middle and lower valve B93, and the other end of the middle and upper valve B92 is connected to the left pipe of the four-way valve 2B in parallel with the other end of the lower valve B94.

The suction port and the discharge port of the compressor 1A of the heat pump circuit a are connected to the finger and the main pipe of the four-way valve 2A, respectively, and the suction port and the discharge port of the compressor 1B of the heat pump circuit B are connected to the finger and the main pipe of the four-way valve 2B, respectively.

The heat pump loop A and the heat pump loop B respectively convert the flow direction of working media through the four-way valve 2A and the four-way valve 2B to realize the conversion of a heating mode and a cooling mode. When the heating mode works, heat source water of the heat exchanger 5 or/and heat of indoor exhaust air can be transferred into the heat exchanger 4, and indoor air and domestic hot water can be heated simultaneously. By adopting two heat pump loops, the domestic hot water can be efficiently raised to a higher appropriate temperature, and meanwhile, the heat source water can generate larger temperature drop to fully utilize the heat of the water. In addition, if time intervals of indoor heat supply and hot water supply are different, the rotating speed of the fan A10 can be adjusted to change the priority sequence of heat supply and hot water supply, for example, the rotating speed of the fan A10 can be reduced to preferentially supply hot water, and conversely, heat supply can be preferentially performed. The fan B11 may change its rotation speed according to the indoor discharge air condition until it stops operating. When the heating mode works, the heat exchanger 4 can simultaneously cool indoor air and cold storage water, the heat exchanger 5 can heat water or/and release heat to indoor exhaust air or outdoor air, and the hot water can be used as life hot water.

Example two

Referring to fig. 5, the embodiment is a heat pump system using an inner tube working medium double-flow-path and liquid single-flow-path sleeve fin type heat exchanger. Compared with the first embodiment, the inner tube flow channels of the sleeve of the fluid A sleeve fin type heat exchanger 4 and the sleeve of the fluid B sleeve fin type heat exchanger 5 form two working medium flow channels, and the flow channel between the tubes forms a liquid flow channel. The rest is the same as the first embodiment.

Referring to fig. 6 and 7, the working medium branches formed by the inner tube 402 of the fluid a sleeve fin type heat exchanger 4 according to the required rule are respectively collected in the working medium flow path one upper collecting tube 407 and the lower collecting tube 416, and the working medium flow path two lower collecting tube 413 and the upper collecting tube 415, which form the working medium flow path one and the working medium flow path two, and the liquid branches formed by the outer tube 401 according to the required rule are respectively collected in the liquid upper collecting tube 405 and the lower collecting tube 414. Except the difference of the connection modes of the working medium flow path and the liquid flow path collecting pipe, the other parts are the same as the heat exchanger in the first embodiment.

Compared with the first embodiment, when the temperature of the fluid B is higher or the heating requirement of a room is smaller, the second embodiment can effectively reduce the running time of the heat pump, and the purpose of saving energy is achieved. For example, if the fluid B is hot water at about 45 ℃, heat can be supplied to indoor air through the sleeve-fin heat exchanger 5 without starting the heat pump; when domestic hot water at 55-65 ℃ is needed at the same time, the heat pump is started to absorb heat from the fluid B and release the heat into the fluid A.

EXAMPLE III

Referring to fig. 8, the embodiment is a heat pump system using a working medium double-flow-path, liquid double-flow-path sleeve fin type heat exchanger. Compared with the first embodiment, the inter-tube channels of the sleeves of the fluid A sleeve fin type heat exchanger 4 and the fluid B sleeve fin type heat exchanger 5 respectively form two working medium channels, and the inner-tube channels also respectively form two liquid channels; the two liquid flow paths can be used in parallel or in series, the fluid can be the same fluid in two temperature ranges or two different fluids, the flexibility of the use of the liquid side is improved, and the working medium flow path and the liquid flow path can be conveniently exchanged for use. The rest is the same as the first embodiment.

Referring to fig. 9 and 10, compared with the heat exchanger of the first embodiment, the outer tube 401 is also prefabricated into a U-shaped tube, the flared portion of the U-shaped tube of the inner tube 402 passes through the bent portion of the U-shaped tube of the outer tube 401, and the other end of the outer tube 401 passes through the bent tube a404 of the outer tube, so that the bent tube B410 of the outer tube can be omitted; the inner pipe 402 is collected in an upper header 405 and an upper header 417 of the liquid flow path I, and a lower header 418 and a lower header 414 of the liquid flow path II respectively through liquid branches formed by an inner pipe elbow 403 according to a required rule; the outer pipe 401 collects working medium branches formed by an outer pipe bent pipe A404 according to a required rule into a working medium flow path first upper collecting pipe 407 and a working medium flow path second lower collecting pipe 413 and an upper collecting pipe 415 respectively. The heat exchanger is the same as the heat exchanger of the first embodiment except that the liquid branch is connected with the collecting pipe in a different manner after one liquid flow path is added.

Example four

Referring to fig. 11, this embodiment is a heat pump system employing a working fluid single flow, liquid single flow double tube finned heat exchanger. The working medium is R290 or R32, and compared with the first embodiment, the other embodiments are the same as the first embodiment except that the inter-tube flow channels of the tubes of the tube-in-tube fin type heat exchanger 4 and the tube-in-tube fin type heat exchanger 5 of the fluid a and the tube-in-tube fin type heat exchanger B respectively form only one working medium flow channel.

Referring to fig. 12 and fig. 13, compared with the first embodiment of the heat exchanger, the outer tube 401 of the fluid a double-tube fin heat exchanger 4 is collected to the working medium upper header 407 and the lower header 413 respectively through the working medium branch formed by the outer tube elbow a404 according to the required rule, and the additional upper header 415 and the additional lower header 416 are omitted; similarly, the inner pipe 402 is collected in the upper and lower liquid

flow path headers

405 and 414, respectively, by the liquid branch formed by the inner pipe elbow 403 according to the required rule; the heat exchanger is the same as the heat exchanger in the first embodiment except that the connection of the working medium branch is reduced after one working medium flow path is reduced, and the connection mode of the working medium branch and the collecting pipe is different.

When the fluid A sleeve finned heat exchanger 4 is arranged indoors and the fluid B sleeve finned heat exchanger 5 is arranged outdoors, at least two application scenes are as follows: the fluid A and the fluid B are both domestic hot water, the heat exchanger 4 can supply domestic hot water while supplying heat to the indoor in winter, the heat exchanger 5 can supply domestic hot water to a family while supplying cold to the indoor in summer, and the energy efficiency ratio of refrigeration in summer can be improved; the other scene is that the fluid A is the domestic hot water, the fluid B is the residual hot water or the hot water made by solar energy, when the heat exchanger 4 supplies heat to the indoor in winter, the heat exchanger 5 can also supply the domestic hot water, and the fluid B and the atmosphere can be used as heat sources, the residual heat or the solar energy is preferentially used, and the energy efficiency ratio of the winter heating is effectively improved.

The above embodiments are only part of application schemes of the technology, a new application scheme can be combined according to actual requirements in an actual application scene, and the flow path arrangement of the two sleeve-pipe fin type heat exchangers can be the same or different. For example, in one of the first two tube-fin heat exchangers, the flow path arrangement of the heat exchanger in the second or third embodiment can be selected according to needs, and in the second or third embodiment, similar selection can be performed according to needs.

Claims

1. Take heat pump system of sleeve pipe finned heat exchanger, its characterized in that: the heat pump system consists of a plurality of compressors (1), a four-way valve (2), a throttling element (3) and two sleeve finned heat exchangers; fins are arranged on the outer side of a sleeve of the sleeve fin type heat exchanger, and working medium or liquid flow channels are arranged on the inter-tube side and the inner tube side of the sleeve; one or more working medium flow paths and liquid flow paths are respectively arranged on the two sleeve finned heat exchangers, and each working medium flow path or each liquid flow path is converged on the inlet and outlet collecting pipes; and a working medium flow path of each sleeve fin type heat exchanger is connected with the compressor (1), the four-way valve (2) and the throttling element (3) into an independent heat pump loop through the inlet collecting pipe and the outlet collecting pipe.

2. The heat pump system with a tube-in-tube fin heat exchanger of claim 1, wherein: filling working medium into the heat pump loop; the number of working medium flow paths arranged on the two sleeve fin type heat exchangers is the same as that of heat pump loops formed correspondingly, and the liquid flow paths are communicated with a configured liquid pipeline through the inlet and outlet collecting pipes of the liquid flow paths.

3. The heat pump system with the double-pipe finned heat exchanger as claimed in claim 1, wherein: the first sleeve finned heat exchanger (4) is provided with two working medium flow paths and a liquid flow path and consists of an outer pipe (401), an inner pipe (402), an inner pipe bent pipe (403), an outer pipe bent pipe A (404), a liquid upper collecting pipe (405), a lower collecting pipe (414), fins (406), a working medium flow path one upper collecting pipe (407), a working medium flow path one lower collecting pipe (416), a right frame (408), an upper frame (409), an outer pipe bent pipe B (410), a left frame (411), a lower frame (412), a working medium flow path two lower collecting pipe (413) and a working medium flow path two upper collecting pipe (415); the outer tubes (401) are arranged into a tube array according to a certain rule, a plurality of fins (406) are connected in series outside the outer tubes, and the tube array of the outer tubes (401) is supported between the left frame (411) and the right frame (408) and is tightly connected together; an inner pipe (402) is prefabricated into a U-shaped pipe and penetrates into an outer pipe (401) to form a sleeve, an outer pipe bent pipe B (410) is sleeved into a U-shaped pipe bending part of the inner pipe (402) in advance, and the inner pipe (402) of the opening part of the U-shaped pipe penetrates through an outer pipe bent pipe A (404); the outer pipe bent pipe A (404) and the bent pipe B (410) connect the outer pipe (401) into a plurality of branches according to the required rules and collect the branches in an upper collecting pipe (407) and a lower collecting pipe (416) of a first working medium flow path and an upper collecting pipe (415) and a lower collecting pipe (413) of a second working medium flow path respectively, and the inner pipe bent pipe (403) connects the inner pipe (402) into a plurality of branches according to the required rules and collect the branches in an upper liquid collecting pipe (405) and a lower liquid collecting pipe (414); the upper frame (409) and the lower frame (412) are respectively connected with the right frame (408) and the left frame (411) to form the mounting frame.

4. The heat pump system with the double-pipe finned heat exchanger as claimed in claim 1, wherein: the heat pump system is provided with two heat pump loops, wherein each heat pump loop consists of a first compressor (1A), a second compressor (1B), a first four-way valve (2A), a second four-way valve (2B), a first throttling element (3A), a second throttling element (3B), a first sleeve finned heat exchanger (4), a second sleeve finned heat exchanger (5), a distributor a (6), a distributor B (7), a distributor c (8), a distributor d (9), a fan A (10) and a fan B (11); a fan A (10) and a fan B (11) are arranged on the fin side of the sleeve fin type heat exchanger, and a first working medium flow path of the first sleeve fin type heat exchanger (4) and a second working medium flow path of the second sleeve fin type heat exchanger (5) are connected with a first compressor (1A), a first four-way valve (2A) and a first throttling element (3A) to form a heat pump loop A after respectively passing through a distributor a (6) and a distributor d (9); a working medium flow path II of the first sleeve tube fin type heat exchanger (4) and a working medium flow path I of the second sleeve tube fin type heat exchanger (5) are respectively connected with a second compressor (1B), a second four-way valve (2B) and a second throttling element (3B) to form a heat pump loop B after passing through a distributor B (7) and a distributor c (8); the tube and fin heat exchanger is configured with one or two fluid flow paths.

5. The heat pump system with a tube-in-tube fin heat exchanger of claim 1, wherein: the finned sleeve of the sleeve finned heat exchanger is a sleeve finned type, a tube rolled finned type or a tube wound type; the fins on the fin sleeve can be omitted, and the outer pipe is formed by connecting single pipes which are arranged according to a rule into a flow path by using bent pipes or is formed into a U-shaped pipe or an S-shaped pipe and then is connected into the flow path by using the bent pipes; the inner pipe arranged in the fin sleeve is a single pipe or a plurality of pipes, and the connection mode of the two ends is suitable for the fin sleeve.

6. The heat pump system with the double-pipe finned heat exchanger as claimed in claim 1, wherein: the flow path arrangement of the two sleeve pipe fin type heat exchangers is the same or different; the number of the working medium channels and the number of the liquid channels are one or two or more.

7. The heat pump system with the double-pipe finned heat exchanger as claimed in claim 1, wherein: the four-way valve can be omitted; the throttling element is a throttling pipe, a throttling hole, a throttling valve or an expansion valve; the compressor is a stand-alone compressor or a compressor cylinder with independent suction and discharge of gas.

8. The heat pump system with the double-pipe finned heat exchanger as claimed in claim 1, wherein: the inner tube and the flow channel between the tubes of the sleeve finned heat exchanger of the heat pump system are respectively filled with liquid and working media, the working media used by different heat pump loops are the same or different, and the fluids used by different liquid flow channels are the same or different.

9. The heat pump system with the sleeve fin type heat exchanger as claimed in claim 3, wherein: the outer pipe (401) of the first sleeve pipe fin type heat exchanger (4) is prefabricated into a U-shaped pipe, an outer pipe bent pipe B (410) can be omitted, the U-shaped pipe opening part of the inner pipe (402) penetrates through the U-shaped pipe bending part of the outer pipe (401), and the other end of the outer pipe (401) penetrates through an outer pipe bent pipe A (404).

10. The heat pump system with the double-pipe finned heat exchanger as claimed in claim 4, wherein: the distributor is formed by connecting four two-way valves or single-phase valves or two three-way valves according to the principle that the flow directions in the working medium flow paths are consistent.