阅读说明：本技术 一种用于循环式空气源热泵热水机的微通道冷凝器 (Micro-channel condenser for circulating air source heat pump water heater ) 是由 刘兴非 李凡 翟晓强 骆琼 其他发明人请求不公开姓名 于 2019-10-15 设计创作，主要内容包括：本发明公开了一种用于循环式空气源热泵热水机的微通道冷凝器,其采用制冷剂微通道扁管平行设置于制冷剂第一集流管和制冷剂第二集流管之间,水第一集流管和水第二集流管均与若干水分流管连通；每根水扁管套在每根制冷剂微通道扁管的外侧,形成套管式结构,端盖穿过制冷剂微通道扁管,焊接在每根水扁管两端,使环形状水流道两端被封闭；制冷剂进气管和制冷剂出液管分别与空气源热泵系统中的相应管路连接,使制冷剂在系统中循环流动。本发明结构简单,易于加工,安装方便；全铝材料轻量化设计更易回收,循环使用；微通道扁管结构增强了制冷剂侧换热系数,使制冷剂充注量减少,可用于更高压力系统；套管式结构能使水和制冷剂形成纯逆流换热,从而提高了传热温差,增大了传热量。(The invention discloses a micro-channel condenser for a circulating air source heat pump water heater, which adopts a refrigerant micro-channel flat pipe which is arranged between a first refrigerant collecting pipe and a second refrigerant collecting pipe in parallel, wherein the first water collecting pipe and the second water collecting pipe are both communicated with a plurality of water shunt pipes; each flat water pipe is sleeved on the outer side of each flat refrigerant microchannel pipe to form a sleeve type structure, and the end covers penetrate through the flat refrigerant microchannel pipes and are welded at two ends of each flat water pipe to seal two ends of the annular water flow channel; the refrigerant inlet pipe and the refrigerant outlet pipe are respectively connected with corresponding pipelines in the air source heat pump system, so that the refrigerant circularly flows in the system. The invention has simple structure, easy processing and convenient installation; the lightweight design of the all-aluminum material is easier to recover and recycle; the microchannel flat tube structure enhances the heat exchange coefficient of the refrigerant side, reduces the refrigerant charge and can be used for a higher-pressure system; the sleeve type structure can enable water and refrigerant to form pure countercurrent heat exchange, thereby improving heat transfer temperature difference and increasing heat transfer capacity.)

1. A micro-channel condenser for a circulating air source heat pump water heater comprises a first refrigerant collecting pipe (1), a second refrigerant collecting pipe (2), a refrigerant air inlet pipe (3), a refrigerant liquid outlet pipe (4) and refrigerant micro-channel flat pipes (5), wherein the first refrigerant collecting pipe (1) and the second refrigerant collecting pipe (2) are respectively connected with two ends of each refrigerant micro-channel flat pipe (5), and the first refrigerant collecting pipe (1) is respectively connected with the refrigerant air inlet pipe (3) and the refrigerant liquid outlet pipe (4); the water-cooling device is characterized by also comprising a water first collecting pipe (7), a water second collecting pipe (8), a horizontal pipe (11), a water shunt pipe (13) and an end cover (14); the water first collecting pipe (7) and the water second collecting pipe (8) are communicated with a plurality of water shunt pipes (13), and each water shunt pipe (13) is connected with a corresponding horizontal pipe (11); the refrigerant microchannel flat tubes (5) are arranged between the refrigerant first collecting pipe (1) and the refrigerant second collecting pipe (2) in parallel and are respectively communicated with the refrigerant first collecting pipe (1) and the refrigerant second collecting pipe (2) so as to enable the refrigerant to finish the condensation process; the flat water pipes (11) are sleeved on the outer side of each refrigerant microchannel flat pipe (5) to form a sleeve type structure, so that water circularly flows in an annular gap channel formed by the outer side of each refrigerant microchannel flat pipe (5) and the flat water pipes (11); the end covers (14) penetrate through the refrigerant micro-channel flat tubes (5) and are welded at two ends of each flat tube (11) for sealing, so that two ends of the annular water flow channel are sealed; the refrigerant inlet pipe (3) and the refrigerant outlet pipe (4) are respectively connected with corresponding pipelines in the air source heat pump system, so that the refrigerant circularly flows in the system.

2. The micro-channel condenser for a circulating air source heat pump water heater according to claim 1, wherein the refrigerant partition (6) is distributed inside the refrigerant first header (1) and/or the refrigerant second header (2) to block the refrigerant flow.

3. The micro-channel condenser for a circulating air source heat pump water heater according to claim 1, characterized in that a water baffle (12) is distributed inside the water first header (7) and/or the water second header (8) blocking the water flow.

4. The micro-channel condenser for a circulating air source heat pump water heater according to claim 3, wherein the number of the water separation plates (12) is three, two of the three are positioned inside the first water collecting pipe (7) and one is positioned inside the second water collecting pipe (8), so that the flat water pipe (11) is divided into four flow paths.

5. The micro-channel condenser for a circulating air source heat pump water heater according to claim 1, wherein a water shunt pipe (13) is connected between the flat water pipe (11) and the first water collecting pipe (7) or the second water collecting pipe (8) to shunt water in the water collecting pipes to each flat water pipe.

6. The micro-channel condenser for a circulating air source heat pump water heater according to claim 1, wherein a cold water inlet pipe (9) and a hot water outlet pipe (10) are respectively connected to the refrigerant second collecting pipe (2).

7. The microchannel condenser for a circulating air source heat pump water heater according to claim 1, wherein the refrigerant microchannel flat tube (5) has a rectangular cross section and contains a plurality of microchannels, and each flat tube has a thickness of 1.4mm ~ 2mm and a width of 12mm ~ 36 mm.

8. The micro-channel condenser for the circulating air source heat pump water heater according to claim 7, wherein the refrigerant micro-channel flat tubes (5) are arranged at intervals, each interval is 5 ~ 10mm, and each micro-channel hydraulic diameter is 0.5mm ~ 1.2.2 mm.

9. The micro-channel condenser for a circulating air source heat pump water heater according to claim 1, wherein the size of the annular slit channel is 1mm ~ 2 mm.

10. The micro-channel condenser for the circulating air source heat pump water heater according to claims 1 to 7, wherein the refrigerant first collecting pipe, the refrigerant second collecting pipe, the refrigerant inlet pipe, the refrigerant outlet pipe, the refrigerant micro-channel flat pipe and the refrigerant partition plate are arranged on the refrigerant first collecting pipe; the first water collecting pipe, the second water collecting pipe, the cold water inlet pipe, the hot water outlet pipe, the flat water pipe, the water partition plate, the water dividing pipe and the end cover are all made of aluminum alloy.

Technical Field

The invention relates to the technical field of heat pump equipment, in particular to a micro-channel condenser for a circulating air source heat pump water heater.

Background

The air energy is a new energy which is developed and widely utilized by human beings after wind energy, solar energy and tidal energy, has high energy efficiency ratio, low carbon and environmental protection, does not generate harmful gas after being utilized, does not discharge carbon dioxide, more importantly, has renewability, is inexhaustible, has high utilization value, and is a key new energy which actively encourages the development and utilization in China. The air source heat pump water heater using air energy has high energy efficiency, obvious energy-saving effect and far lower operating cost than other traditional heat source heat devices (coal boilers, oil boilers and electric boilers). The water with the same weight can be heated by air under the same environment, the cost of the water heater is only one fourth of that of an electric water heater and one third of that of a gas water heater, and the operation energy efficiency is even higher than that of an electric auxiliary heating solar water heater.

The air source heat pump water heater has two hot water heating modes, one mode is static heating, most of the heating pipes are wrapped outside the inner container of the water tank, and the water in the water tank absorbs the condensation heat released by a refrigerant in the heating pipes through natural convection; the other type is circulating heating, a heat pump is communicated with a water storage tank, water in the water storage tank circularly and continuously flows through a heat pump condenser under the driving of a water pump, heat exchange is carried out between the water and a refrigerant until the water is heated to a set temperature, and the heat pump condenser mostly adopts a shell and tube heat exchanger or a plate heat exchanger. Static heating methods are mostly applied to household heat pump water heaters, circulating heating methods are mostly applied to commercial heat pump water heaters, and buildings such as factories, hotels and natatoriums need a large amount of domestic hot water every day and must adopt circulating heating methods.

An all-aluminum condenser for the static heating heat pump water heater is formed by a plurality of parallel micro-channel flat tubes and wrapped outside a water tank liner. The all-aluminum design reduces the weight of the heat exchanger, saves the cost and can be recycled; each flat tube comprises a plurality of micro channels, so that the condensation convection heat transfer coefficient of the refrigerant side is remarkably increased; in addition, the microchannel structure has high pressure bearing capacity, is applicable to higher pressure systems, and reduces refrigerant charge.

However, in the prior art, the inner container wall of the water tank is arranged between the micro-channel heat exchanger and water, so that the heat conduction resistance is large and the heat exchange efficiency is low. In addition, the existing micro-channel condenser structure is only used for the static heating heat pump water heater under most conditions, but not used for the circulating heat pump water heater, and the use occasions are severely limited, so that the advantages of the micro-channel flat tube structure cannot be realized in the circulating air source heat pump water heater.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a micro-channel condenser for a circulating air source heat pump water heater, which solves the problems of low heat exchange efficiency, limited use occasions and the like of the conventional micro-channel heat exchanger.

According to the technical scheme provided by the invention, the micro-channel condenser for the circulating air source heat pump water heater,

the refrigerant first collecting pipe and the refrigerant second collecting pipe are respectively connected with two ends of each refrigerant microchannel flat pipe, and the refrigerant first collecting pipe is respectively connected with the refrigerant inlet pipe and the refrigerant outlet pipe; is characterized by also comprising a first water collecting pipe, a second water collecting pipe, a horizontal pipe, a water shunt pipe and an end cover; the water first collecting pipe and the water second collecting pipe are both communicated with a plurality of water shunt pipes, and each water shunt pipe is connected with a corresponding water flat pipe; the refrigerant microchannel flat tubes are arranged between the first refrigerant collecting pipe and the second refrigerant collecting pipe in parallel and are respectively communicated with the first refrigerant collecting pipe and the second refrigerant collecting pipe so as to enable the refrigerant to finish the condensation process; the flat water pipes are sleeved on the outer sides of the flat pipes of the refrigerant micro-channels to form a sleeve type structure, so that water circularly flows in an annular gap channel formed by the outer sides of the flat pipes of the refrigerant micro-channels and the flat water pipes; the end covers penetrate through the refrigerant micro-channel flat pipes and are welded at two ends of each flat pipe for sealing, so that two ends of the annular water flow channel are sealed; the refrigerant inlet pipe and the refrigerant outlet pipe are respectively connected with corresponding pipelines in the air source heat pump system, so that the refrigerant circularly flows in the system.

Preferably, the refrigerant partition plates are distributed in the refrigerant first collecting pipe and/or the refrigerant second collecting pipe to block the refrigerant from flowing, and divide the plurality of refrigerant microchannel flat pipes into a plurality of flows, so that the refrigerant forms reciprocating and circuitous snake-shaped flow in the refrigerant; and finally flows out of the refrigerant outlet pipe.

Preferably, the water partition plates are distributed inside the first water collecting pipe and/or the second water collecting pipe to block water from flowing and divide the plurality of water flat pipes into a plurality of flows, so that the water flows back and forth in a roundabout manner to form pure downstream flow, pure upstream flow or mixed flow of the pure downstream flow and the upstream flow with the refrigerant in the micro-channel flat pipes.

Preferably, the water partition plates are three, two of the water partition plates are positioned in the first water collecting pipe, and one of the water partition plates is positioned in the second water collecting pipe, so that the 15 flat water pipes are divided into four flows.

Preferably, the water dividing pipe is connected between the first water collecting pipe and the second water collecting pipe to divide water in the collecting pipes into each water flat pipe.

Preferably, a cold water inlet pipe and a hot water outlet pipe are respectively connected to the second refrigerant collecting pipe.

Preferably, the cross section of the refrigerant microchannel flat tube is rectangular and comprises a plurality of microchannels, and the thickness of each flat tube is 1.4mm ~ 2mm, and the width of each flat tube is 12mm ~ 36 mm.

Preferably, the refrigerant microchannel flat tubes are arranged at intervals, each interval is 5 ~ 10mm, and the hydraulic diameter of each microchannel is 0.5mm ~ 1.2.2 mm.

Preferably, the size of the annular slit passage is 1mm ~ 2 mm.

Preferably, the refrigerant first collecting pipe, the refrigerant second collecting pipe, the refrigerant inlet pipe, the refrigerant outlet pipe, the refrigerant microchannel flat pipe and the refrigerant partition plate are arranged in the refrigerant inlet pipe; the first water collecting pipe, the second water collecting pipe, the cold water inlet pipe, the hot water outlet pipe, the flat water pipe, the water partition plate, the water dividing pipe and the end cover are all made of aluminum alloy.

The invention has the beneficial effects that: according to the scheme, the invention discloses a micro-channel condenser for a circulating air source heat pump water heater, which mainly comprises a refrigerant micro-channel flat pipe, a flat water pipe, a refrigerant partition plate and a water partition plate. For the refrigerant microchannel flat tube, the included microchannel obviously increases the heat transfer coefficient of refrigerant condensation and convection, and enhances heat transfer; meanwhile, the refrigerant filling amount of the system is reduced, the pressure-bearing capacity of the heat exchanger is improved, and the refrigerant filling system can be used for filling refrigerant with higher condensation pressure (such as R410A and CO)₂) The heat pump system of (1). For the flat water pipe, the flat water pipe and the refrigerant micro-channel flat pipe form a sleeve type structure, a circular circulating water flow channel is formed, direct contact between water and the heating pipe is realized, and the heat exchange effect is enhanced. For the refrigerant partition plates and the water partition plates, the refrigerant and the water flow in a reciprocating and circuitous way in the flat pipes, the quantity and the distribution positions of the refrigerant and the water partition plates are changed, so that the water and the refrigerant form pure forward flow, pure reverse flow or mixed forward flow and reverse flow, the pure reverse flow can improve the heat transfer temperature difference, and the heat exchange quantity is increased. In addition, the invention has simple structure, easy processing and convenient installation; and the design of all aluminum is adopted, so that the cost is reduced, the recycling is easier, and the weight of the heat exchanger is reduced.

Drawings

FIG. 1 is a schematic view of the overall three-dimensional structure of the present invention;

FIG. 2 is a schematic diagram of a circular circulating water flow passage according to the present invention;

fig. 3 is a schematic view of the end cap structure of the present invention.

In the figure: 1. a first refrigerant header; 2. a second refrigerant collecting pipe; 3. a refrigerant inlet pipe; 4. a refrigerant outlet pipe; 5. a refrigerant microchannel flat tube; 6. a refrigerant separator; 7. a first header of water; 8. a second header pipe of water; 9. a cold water inlet pipe; 10. a hot water outlet pipe; 11. a horizontal pipe; 12. a water separator; 13. a water diversion pipe; 14. an end cap; 15. a refrigerant flow direction; 16. the direction of water flow.

Detailed Description

The invention will be further described with reference to the accompanying drawings and an embodiment of a micro-channel condenser for a circulating air source heat pump water heater.