Air conditioner cooling type supercooling device

Abstract

The utility model discloses an air conditioner cooling type supercooling device which is used for a refrigerating system composed of a compressor (1), a condensation heat exchanger (2), a throttling element (5) and an evaporation heat exchanger (6) and comprises a first connecting pipeline (3) between an outlet of the condensation heat exchanger (2) and an inlet of the throttling element (5) and a second connecting pipeline (8) between an outlet of the evaporation heat exchanger (6) and a return opening of the compressor (1). And the first connecting pipeline (3) is in contact connection with the second connecting pipeline (8). According to the device, the supercooling degree of an air conditioning system is greatly improved while the design cost is not increased.

Description

Technical Field

[0001] This utility model relates to subcooling technology used in the field of air conditioning refrigeration, specifically a subcooling device for air conditioning cooling. Background Technology

[0002] In air conditioning systems, refrigerant releases heat through a heat exchanger with the medium (air). Before throttling, the refrigerant liquid is cooled to a state below its condensation temperature; this is called liquid subcooling. As shown in the refrigerant's thermodynamic state diagram, the greater the subcooling before throttling, the lower the dryness fraction after throttling, and the greater the unit cooling capacity of the cycle. Therefore, liquid subcooling is highly effective in improving the cooling capacity and coefficient of performance (COP) of an air conditioner. Furthermore, a certain degree of subcooling prevents the refrigerant from being in a two-phase state before entering the throttling device, ensuring stable operation of the throttling element.

[0003] Currently, air conditioning systems typically employ three subcooling methods to achieve subcooling: First, increasing the condenser area, which raises design costs and is uneconomical. Second, adding a separate subcooler, which complicates the manufacturing process. Third, increasing the condenser circulation airflow, significantly increasing the power and noise levels of the air conditioner. Therefore, existing subcooling methods in air conditioning suffer from high costs, complex implementation, and high energy consumption. Utility Model Content

[0004] This utility model provides an air conditioning cooling type subcooling device to solve the problems of high cost, complex implementation and high energy consumption in the existing air conditioning application subcooling method.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An air conditioning cooling type subcooling device is used in a refrigeration system consisting of a compressor (1), a condensing heat exchanger (2), a throttling element (5), and an evaporating heat exchanger (6). In the refrigeration system, the outlet of the compressor (1) is connected to the inlet of the condensing heat exchanger (2) through a pipeline. The outlet of the condensing heat exchanger (2) is connected to the inlet of the throttling element (5) through a first connecting pipeline (3). The outlet of the throttling element (5) is connected to the inlet of the evaporating heat exchanger (6) through a pipeline. The outlet of the evaporating heat exchanger (6) is connected to the return port of the compressor (1) through a second connecting pipeline (8). The device includes a first connecting pipeline (3) between the outlet of the condensing heat exchanger (2) and the inlet of the throttling element (5), and a second connecting pipeline (8) between the outlet of the evaporating heat exchanger (6) and the return port of the compressor (1). The circumferential sides of the first connecting pipeline (3) and the second connecting pipeline (8) are in contact with each other.

[0007] Furthermore, both the first connecting pipe (3) and the second connecting pipe (8) are copper pipes.

[0008] Furthermore, a heat conduction plate is provided between the circumferential sides of the first connecting pipe (3) and the second connecting pipe (8), and the circumferential side of the first connecting pipe (3) is connected to the circumferential side of the second connecting pipe (8) through the heat conduction plate.

[0009] This invention designs and develops a cooling-type subcooling device that is simple in structure, easy to implement, and does not increase the cost of air conditioning. It utilizes the low-temperature, low-pressure refrigerant vapor gas (generally around 8-15°C) formed by the refrigerant circulating in the air conditioner through the second connecting pipe after vaporization and heat absorption in the evaporator heat exchanger, which exchanges heat with the high-pressure saturated liquid (generally around 40-53°C) exiting the condenser heat exchanger through the first connecting pipe. This further cools the high-pressure saturated liquid, releasing heat and achieving the purpose of cooling and subcooling in a cooling-type subcooling device.

[0010] This invention increases the flow rate of refrigerant in the high-pressure saturated liquid pipe. The increased flow rate will increase the heat transfer coefficient in the refrigerant pipe and thus the heat transfer coefficient of the air conditioning system. This will reduce the condensation heat transfer area, thereby achieving the goal of cost reduction and efficiency improvement. It significantly improves the subcooling of the air conditioning system without increasing the design cost.

[0011] Compared with the prior art, the advantages of this utility model are:

[0012] 1) This utility model of subcooling device for air conditioning does not incur any cost compared to other subcooling devices. Moreover, this device increases the flow rate of refrigerant in the pipe, thereby increasing the heat exchange coefficient of the air conditioning system. The heat exchange efficiency is increased by more than 46% through comparison of laboratory test data. This can reduce the condensation heat exchange area and achieve the purpose of cost reduction and efficiency improvement.

[0013] 2) This utility model has no cost increase, is simple and easy to implement, and is safe and reliable.

[0014] 3) This utility model has a simple process and a wide range of applications, and can be widely used in various commercial window-type, split wall-mounted, and cabinet-type industrial air conditioners; it can be mass-produced, and existing air conditioners can also be modified on-site according to different working conditions, making it convenient and practical. Increasing subcooling has a positive effect on improving the performance of the entire air conditioning refrigeration system: increasing cooling capacity, increasing energy efficiency ratio, etc. This ensures the refrigeration system operates reliably for a long time, thus significantly reducing and minimizing air conditioner maintenance and improving production and assembly efficiency.

[0015] 4) This utility model is technically mature and easy to implement. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of this utility model. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1 As shown, this embodiment discloses an air conditioning cooling type subcooling device for a refrigeration system consisting of a compressor 1, a condenser heat exchanger 2 equipped with a fan, a filter 4, a throttling element 5, and an evaporator heat exchanger 6 equipped with a fan. In the refrigeration system, the outlet of the compressor 1 is connected to the inlet of the condenser heat exchanger 2 via a pipe. The outlet of the condenser heat exchanger 2 is connected to the inlet of the filter 4 via a first connecting pipe 3. The outlet of the filter 4 is connected to the inlet of the throttling element 5 via a pipe. The outlet of the throttling element 5 is connected to the inlet of the evaporator heat exchanger 6 via a pipe. A water collection tank 7 for collecting condensate is provided below the evaporator heat exchanger 6. The outlet of the evaporator heat exchanger 6 is connected to the return port of the compressor 1 via a second connecting pipe 8.

[0019] This embodiment includes a first connecting pipe 3 between the outlet of the condenser heat exchanger 2 and the inlet of the throttling element 5, and a second connecting pipe 8 between the outlet of the evaporator heat exchanger 6 and the return port of the compressor 1. Both the first connecting pipe 3 and the second connecting pipe 8 are copper pipes, and their circumferential sides are in contact with each other. Alternatively, the circumferential sides of the first connecting pipe 3 and the second connecting pipe 8 are in contact with each other through a heat conduction plate made of copper material.

[0020] In this embodiment, the compressor 1 discharges high-temperature, high-pressure refrigerant gas to the condenser heat exchanger 2. The refrigerant discharged from the condenser heat exchanger 2 passes through the first connecting pipe 3, the filter 4, and the throttling element 5 to reduce its pressure before entering the evaporator heat exchanger 6. Inside the evaporator heat exchanger 6, the refrigerant absorbs heat and vaporizes into low-temperature, low-pressure refrigerant vapor, which then returns to the compressor 1 in a continuous cycle.

[0021] In this embodiment, the refrigerant circulating in the air conditioner through the second connecting pipe 8 vaporizes and absorbs heat in the evaporator heat exchanger 6, resulting in low-temperature, low-pressure refrigerant vapor gas (experimental data: 8-15°C). This vapor gas then exchanges heat with the high-pressure saturated liquid (experimental data: 40-53°C) flowing out of the condenser heat exchanger 2 through the first connecting pipe 3. This process further cools the high-pressure saturated liquid, releasing heat and achieving subcooling.

[0022] The specific control process of this utility model is as follows:

[0023] The low-temperature, low-pressure refrigerant gas from the air conditioner is drawn in by the compressor 1 and compressed into high-temperature, high-pressure refrigerant gas before being discharged into the condenser heat exchanger 2. In the condenser heat exchanger 2, the refrigerant is cooled into a high-temperature, high-pressure saturated liquid. The first connecting pipe 3 and the second connecting pipe 8 are connected to allow the cooled, high-pressure saturated refrigerant liquid to exchange heat with the low-temperature, low-pressure refrigerant vapor passing through the first connecting pipe 3 and the second connecting pipe 8. The low-temperature refrigerant circulating within the refrigerant exchanges heat with the high-temperature liquid exiting the condenser heat exchanger, thereby further cooling and releasing heat to subcool the high-pressure saturated liquid refrigerant into a subcooled liquid refrigerant, thus increasing the subcooling degree of the refrigerant.

[0024] Then, the refrigerant, after being collected and subcooled, flows through filter 4 and enters the throttling element 5 for pressure reduction before flowing into the evaporator heat exchanger 6. In the evaporator, the subcooled low-pressure liquid refrigerant evaporates, absorbs heat, and vaporizes, thus cooling the indoor air and achieving a cooling effect. The refrigerant liquid vaporizes and absorbs heat, absorbing the heat from the air passing through the evaporator. The evaporator heat exchanger 6 reaches the dew point and condenses into condensate, which flows into the end drip tray 7, reducing the indoor air humidity and achieving a dehumidification effect. The refrigerant gas after passing through the evaporator heat exchanger 6 is then drawn into the compressor 1 again through the second connecting pipe 8. This cycle repeats repeatedly, achieving the purpose of reducing room temperature and humidity.

[0025] A cooling-type subcooling device that utilizes the heat exchange between low-temperature vapor refrigerant and high-temperature liquid refrigerant in air conditioning continuously improves the subcooling of the air conditioner, thereby increasing and enhancing the performance of the entire air conditioning refrigeration system and producing good results: increasing the cooling capacity of the air conditioner, increasing the energy efficiency ratio, and achieving the goal of cost reduction and efficiency improvement.

[0026] The preferred embodiments of this utility model have been described in detail above with reference to the accompanying drawings. These embodiments are merely descriptions of preferred embodiments and are not intended to limit the concept and scope of this utility model. The various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. Such combinations, as long as they do not violate the spirit of this utility model, should also be considered as part of this disclosure. To avoid unnecessary repetition, this utility model will not further describe all possible combinations.

[0027] This utility model is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this utility model and without departing from the design idea of ​​this utility model, all modifications and improvements made by those skilled in the art to the technical solution of this utility model should fall within the protection scope of this utility model. The technical content for which protection is sought in this utility model has been fully recorded in the claims.

Claims

1. An air conditioning cooling type subcooling device for a refrigeration system consisting of a compressor (1), a condensing heat exchanger (2), a throttling element (5), and an evaporating heat exchanger (6), wherein the outlet of the compressor (1) in the refrigeration system is connected to the inlet of the condensing heat exchanger (2) via a pipeline, the outlet of the condensing heat exchanger (2) is connected to the inlet of the throttling element (5) via a first connecting pipeline (3), the outlet of the throttling element (5) is connected to the inlet of the evaporating heat exchanger (6) via a pipeline, and the outlet of the evaporating heat exchanger (6) is connected to the return port of the compressor (1) via a second connecting pipeline (8), characterized in that, The first connecting pipe (3) is between the outlet of the condenser heat exchanger (2) and the inlet of the throttling element (5), and the second connecting pipe (8) is between the outlet of the evaporator heat exchanger (6) and the return port of the compressor (1). The circumferential sides of the first connecting pipe (3) and the second connecting pipe (8) are connected in contact.

2. The subcooling device of the air conditioning cooling type according to claim 1, characterized in that, Both the first connecting pipe (3) and the second connecting pipe (8) are copper pipes.

3. The subcooling device of the air conditioning cooling type according to claim 1, characterized in that, A heat conduction plate is provided between the circumferential sides of the first connecting pipe (3) and the second connecting pipe (8), and the circumferential side of the first connecting pipe (3) is connected to the circumferential side of the second connecting pipe (8) through the heat conduction plate.

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