Efficient combined type flow dividing heat exchanger

Abstract

The utility model particularly relates to an efficient combined type flow dividing heat exchanger which comprises a gas collecting pipe, an upper heat exchange flow path, a lower heat exchange flow path, a flow divider, branch gas pipes, a one-way valve, a first throttling device, a second throttling device and flow dividing throttling pipes, and the flow divider is communicated with the upper heat exchange flow path through two flow dividing pipes and communicated with the lower heat exchange flow path through one flow dividing pipe. The upper heat exchange flow path is communicated with the gas collecting pipe through two branch gas pipes, one end of the one-way valve is connected with the gas collecting pipe, the other end of the one-way valve is connected with the lower heat exchange flow path, and the one-way valve is communicated with the gas collecting pipe from the lower heat exchange flow path. The other end of the second throttling device is communicated with the indoor heat exchanger, and the second throttling device is arranged on the shunting throttling pipe. During heating, four evaporation flow paths are averagely divided; and during refrigeration, two condensation flow paths and two supercooling flow paths are divided, so that optimal flow division control can be realized during refrigeration and heating.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning heat exchanger technology, specifically a high-efficiency combined split-flow heat exchanger. Background Technology

[0002] With the continuous development of air conditioning technology, product comfort and efficient heat exchange are receiving increasing attention. Most existing air conditioning products are split-type structures, consisting of an indoor unit and an outdoor unit. The heat exchange efficiency of the heat exchanger directly affects the cooling and heating performance of the air conditioner.

[0003] When an air conditioner is cooling, the outdoor heat exchanger acts as a condenser, and the less heat exchange it receives, the better. When the air conditioner is heating, the more heat exchange it receives, the better. Currently, in most cases, heating and cooling share the same system circuit, which cannot simultaneously meet the high-efficiency heat exchange requirements of the heat exchanger under different operating modes, thus failing to achieve the best energy-saving effect of the air conditioner. Utility Model Content

[0004] The purpose of this invention is to provide a high-efficiency combined split-flow heat exchanger to solve the problem that existing air conditioning heat exchangers cannot simultaneously meet the high-efficiency heat exchange requirements of different operating modes.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A high-efficiency combined split-flow heat exchanger includes a gas collecting pipe, an upper heat exchange flow path, a lower heat exchange flow path, a splitter, and branch gas pipes. The splitter is connected to the upper heat exchange flow path through two split pipes and to the lower heat exchange flow path through one split pipe. The upper heat exchange flow path is connected to the gas collecting pipe through two branch gas pipes. The feature is that it further includes a one-way valve, a first throttling device, a second throttling device, and a split-flow throttling pipe. One end of the one-way valve is connected to the gas collecting pipe, and the other end is connected to the lower heat exchange flow path. The conduction direction of the one-way valve is from the lower heat exchange flow path to the gas collecting pipe. One end of the first throttling device is connected to the splitter, and the other end is connected to the indoor heat exchanger. One end of the split-flow throttling pipe is connected to the lower heat exchange flow path, and the other end is connected to the indoor heat exchanger. The second throttling device is disposed on the split-flow throttling pipe.

[0006] Preferably, the first throttling device and the second throttling device are one or two of the following: an electronic expansion valve, a capillary tube, and a throttling valve.

[0007] Compared with the prior art, the beneficial effects of this utility model are:

[0008] When heating, the heat exchanger is divided into four evaporation flow paths on average; when cooling, it is divided into two condensation flow paths and two subcooling flow paths, with a condensation to subcooling ratio of 1:1. Optimal flow control can be achieved in both cooling and heating. When the heat exchanger acts as a condenser, the refrigerant flow rate is high and the subcooling is large; when it acts as an evaporator, the number of flow paths is large and the system pressure drop is small, which greatly improves the heat exchange capacity and efficiency, and improves the overall performance and energy efficiency of the unit. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structural principle of the high-efficiency combined split-flow heat exchanger of this utility model;

[0010] Figure 2 This is a schematic diagram of the refrigerant flow direction in the high-efficiency combined split-flow heat exchanger of this utility model;

[0011] Figure 3 This is a schematic diagram of the refrigerant flow direction in the high-efficiency combined split-flow heat exchanger of this utility model.

[0012] In the diagram: 1. Gas collecting pipe; 2. Upper heat exchange flow path; 3. Lower heat exchange flow path; 4. Diverter; 5. Branch gas pipe; 6. Diverter pipe; 7. One-way valve; 8. First throttling device; 9. Second throttling device; 10. Diverter throttling pipe. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0014] Example

[0015] Please see Figures 1 to 3 A high-efficiency combined split-flow heat exchanger includes a gas collecting pipe 1, an upper heat exchange flow path 2, a lower heat exchange flow path 3, a splitter 4, and branch gas pipes 5. The splitter 4 is connected to the upper heat exchange flow path 2 through two branch pipes 6 and to the lower heat exchange flow path 3 through one branch pipe 6. The upper heat exchange flow path 2 is connected to the gas collecting pipe 1 through two branch gas pipes 5. Further, the heat exchanger also includes a one-way valve 7, a first throttling device 8, a second throttling device 9, and a split-flow throttling pipe 10. One end of the one-way valve 7 is connected to the gas collecting pipe 1, and the other end is connected to the lower heat exchange flow path 3. The conduction direction of the one-way valve 7 is from the lower heat exchange flow path 3 to the gas collecting pipe 1. One end of the first throttling device 8 is connected to the splitter 4, and the other end is connected to the indoor heat exchanger. One end of the split-flow throttling pipe 10 is connected to the lower heat exchange flow path 3, and the other end is connected to the indoor heat exchanger. The second throttling device 9 is installed on the split-flow throttling pipe 10.

[0016] The first throttling device 8 and the second throttling device 9 employ one or both of the following: an electronic expansion valve, a capillary tube, and a throttling valve. In this embodiment, the first throttling device 8 and the second throttling device 9 are selected as throttling valves.

[0017] During cooling, the outdoor unit acts as a condenser. High-temperature and high-pressure refrigerant gas enters from the gas collection pipe 1, and the one-way valve 7 closes in the reverse direction. The gaseous refrigerant enters the upper heat exchange flow path 2 from the branch gas pipe. After condensation, it passes through two branch pipes 6 and converges at the distributor 4. At this time, the control system adjusts and maintains the minimum opening of the first throttling device 8, reducing the flow rate to the minimum or closing it. Most of the refrigerant enters the lower heat exchange flow path 3 from the other branch pipe 6 and is subcooled. After subcooling, it is throttled by the second throttling device 8 and flows out of the heat exchanger.

[0018] During heating, the outdoor unit acts as an evaporator. Low-temperature, low-pressure refrigerant liquid enters from the lower inlet, with one path passing through the first throttling device 7 and the other through the second throttling device 8. The control system adjusts the opening of the two throttling devices to distribute different flow rates, ensuring uniform refrigerant supply to each branch of the system. At this time, the control system adjusts the one-way valve 6 on the side of the gas collecting pipe 1 to the open state. The refrigerant undergoes heat exchange in four paths—heat exchange path 2 and the lower heat exchange path 3—before converging in the gas collecting pipe 1 and flowing out of the heat exchanger.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency combined split-flow heat exchanger, comprising a gas collecting pipe, an upper heat exchange flow path, a lower heat exchange flow path, a splitter, and branch gas pipes, wherein the splitter is connected to the upper heat exchange flow path through two branch pipes and to the lower heat exchange flow path through one branch pipe, and the upper heat exchange flow path is connected to the gas collecting pipe through two branch gas pipes, characterized in that: It also includes a one-way valve, a first throttling device, a second throttling device, and a diversion throttling pipe. One end of the one-way valve is connected to the gas collecting pipe, and the other end is connected to the lower heat exchange flow path. The conduction direction of the one-way valve is from the lower heat exchange flow path to the gas collecting pipe. One end of the first throttling device is connected to the diverter, and the other end is connected to the indoor heat exchanger. One end of the diversion throttling pipe is connected to the lower heat exchange flow path, and the other end is connected to the indoor heat exchanger. The second throttling device is installed on the diversion throttling pipe.

2. The high-efficiency combined split-flow heat exchanger according to claim 1, characterized in that: The first throttling device and the second throttling device are one or two of the following: electronic expansion valve, capillary tube, and throttling valve.

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