Air conditioner cooling type supercooling device

Abstract

The invention 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 the air conditioning system is greatly improved while the design cost is not increased.

Description

Technical Field

[0001] The invention relates to a supercooling technology applied in the field of air conditioning and refrigeration, in particular to an air conditioning temperature reduction type supercooling device. Background Art

[0002] The air conditioner refrigerant releases heat with the medium (air) through the heat exchanger. The refrigerant liquid in the air conditioner refrigeration system cools to a state below the condensation temperature before throttling, which is called liquid supercooling. From the thermodynamic state diagram of the refrigerant, it can be seen that the greater the supercooling degree of the liquid before throttling, the smaller the dryness after throttling, and the greater the unit cooling capacity of the cycle. Therefore, liquid supercooling is very effective in improving the cooling capacity and refrigeration coefficient of the air conditioner. In addition, a certain degree of supercooling can also prevent the refrigerant from being in a two-phase state before entering the throttling device, so that the throttling element works stably.

[0003] At present, in order to achieve the purpose of supercooling, air conditioning refrigeration technology usually adopts three supercooling methods: the first is to increase the condensing area, which increases the design cost of the air conditioner and is not economical; the second is to set up a separate supercooler to increase the product, and the process of the product air conditioner is more complicated. The third is to increase the condensing cycle air volume, which will greatly increase the power and noise of the air conditioner product. Therefore, the existing air conditioning supercooling implementation methods have the problems of high cost, complex implementation and high energy consumption. Summary of the invention

[0004] The present invention provides an air-conditioning temperature-lowering type supercooling device to solve the problems of high cost, complex implementation and high energy consumption in the air-conditioning supercooling mode in the existing refrigeration technology.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: An air conditioning cooling type supercooling device is used in a refrigeration system composed 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, and 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 comprises 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), wherein the circumferential side surfaces of the first connecting pipeline (3) and the second connecting pipeline (8) are in contact with each other.

[0006] Furthermore, the first connecting pipeline (3) and the second connecting pipeline (8) are both copper pipes.

[0007] Furthermore, a heat conduction plate is provided between the circumferential side surfaces of the first connecting pipeline (3) and the second connecting pipeline (8), and the circumferential side surface of the first connecting pipeline (3) is in contact and connected with the circumferential side surface of the second connecting pipeline (8) via the heat conduction plate.

[0008] The present invention designs and develops a cooling type supercooling device which has a simple structure, is easy to implement, and does not increase any cost for the air conditioner. The cooling type supercooling device uses the low-temperature, low-pressure refrigerant steam gas (which is generally around 8-15°C) formed after the refrigerant circulating in the air conditioner itself through the second connecting pipeline is vaporized and absorbs heat in the evaporative heat exchanger, and forms heat exchange with the high-pressure saturated liquid (which is generally around 40-53°C) exiting the condensing heat exchanger through the first connecting pipeline, so that the high-pressure saturated liquid is further cooled and heat is released to achieve the purpose of cooling and supercooling of the cooling type supercooling device.

[0009] The device of the present invention increases the flow rate of the refrigerant in the high-pressure saturated liquid tube. After the flow rate is increased, the heat transfer coefficient in the refrigerant tube will increase, and the heat transfer coefficient of the air-conditioning system will increase, thereby reducing the condensation heat exchange area, achieving the purpose of reducing costs and increasing efficiency, and achieving a significant increase in the supercooling of the air-conditioning system without increasing the design cost.

[0010] Compared with the prior art, the present invention has the following advantages: 1) Compared with other supercooling devices, the supercooling device of the present invention does not incur any cost, and this device increases the flow rate of the refrigerant in the tube, thereby increasing the heat exchange coefficient of the air conditioning system, and its heat exchange efficiency is increased by more than 46% through comparison of laboratory test data; thereby, the condensation heat exchange area can be reduced, achieving the purpose of reducing costs and increasing efficiency.

[0011] 2) The present invention does not increase any cost and is simple, easy to implement, safe and reliable.

[0012] 3) The process of the present invention is simple and has a wide range of applications. It can be widely used in various commercial window-type, split wall-mounted and cabinet-type industrial air conditioners. It can be produced in series, and existing air conditioners can be modified on site according to different working conditions. It is convenient and practical. The increase in supercooling will have a good effect on improving the performance of the entire air conditioning refrigeration system: increasing the cooling capacity, increasing the energy efficiency ratio, etc. This ensures that the refrigeration system can operate reliably for a long time, so the maintenance of the air conditioner can be greatly reduced, and the production and assembly efficiency can be improved.

[0013] 4) The technology of the present invention is mature and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural principle diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0016] like Figure 1 As shown, this embodiment discloses an air conditioning cooling type supercooling device, which is used in a refrigeration system consisting of a compressor 1, a condensing heat exchanger 2 equipped with a fan, a filter 4, a throttling element 5, and an evaporative heat exchanger 6 equipped with a fan. 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 filter 4 through a first connecting pipeline 3, the outlet of the filter 4 is connected to the inlet of the throttling element 5 through a pipeline, the outlet of the throttling element 5 is connected to the inlet of the evaporative heat exchanger 6 through a pipeline, a water receiving tank 7 for receiving condensed water is provided below the evaporative heat exchanger 6, and the outlet of the evaporative heat exchanger 6 is connected to the return port of the compressor 1 through a second connecting pipeline 8.

[0017] This embodiment 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 first connecting pipeline 3 and the second connecting pipeline 8 are both copper pipes, and the circumferential side surfaces of the first connecting pipeline 3 and the second connecting pipeline 8 are in contact and connected. Alternatively, the circumferential side surfaces of the first connecting pipeline 3 and the second connecting pipeline 8 are in contact and connected through a heat conduction plate made of copper material.

[0018] In this embodiment, the compressor 1 discharges high-temperature, high-pressure refrigerant gas to the condensing heat exchanger 2. The refrigerant discharged from the condensing heat exchanger 2 passes through the first connecting pipe 3 and enters the evaporating heat exchanger 6 after throttling and reducing the pressure through the filter 4 and the throttling element 5. The refrigerant absorbs heat inside the evaporating heat exchanger 6 and vaporizes into low-temperature, low-pressure refrigerant vapor, which flows back to the compressor 1 and circulates back and forth.

[0019] In this embodiment, the refrigerant circulating in the air conditioner through the second connecting pipeline 8 is vaporized and absorbs heat in the evaporative heat exchanger 6 to form a low-temperature, low-pressure refrigerant vapor gas (test data is about 8 to 15°C), which forms a heat exchange with the high-pressure saturated liquid (test data is about 40 to 53°C) flowing out of the condensing heat exchanger 2 through the first connecting pipeline 3, so that the high-pressure saturated liquid is further cooled and releases heat to achieve the purpose of supercooling.

[0020] The specific control process of the present invention is as follows: The low-temperature, low-pressure refrigerant gas of the air conditioner is sucked in by the compressor 1 and compressed into high-temperature, high-pressure refrigerant gas and discharged into the condensing heat exchanger 2. In the condensing heat exchanger 2, the refrigerant is cooled to become a high-temperature, high-pressure saturated liquid. The first connecting pipe 3 and the second connecting pipe 8 are contact-connected to make the liquid cooled to the high-pressure saturated refrigerant 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 in the refrigerant itself exchanges heat with the high-temperature liquid exiting the condensing heat exchanger, so as to further cool the high-pressure saturated liquid refrigerant and release heat to be supercooled to become a supercooled liquid refrigerant, thereby increasing the supercooling degree of the refrigerant.

[0021] Then the refrigerant gathers and subcools and flows through the filter 4 into the throttling element 5 for throttling and reducing the pressure, and then flows into the evaporative heat exchanger 6, where the subcooled low-pressure liquid refrigerant evaporates and absorbs heat to vaporize, thereby cooling the indoor air and achieving a cooling effect. The refrigerant liquid vaporizes and absorbs heat, absorbing the heat of the air passing through the evaporator. The surface of the evaporative heat exchanger 6 reaches the dew point and condenses into condensed water, which flows into the terminal water pan 7 to reduce the indoor air humidity and achieve a dehumidification effect. The refrigerant gas after passing through the evaporative heat exchanger 6 is again sucked into the compressor 1 through the second connecting pipe 8, and this cycle is repeated to achieve the purpose of reducing the room temperature and humidity.

[0022] The cooling type subcooling device utilizes the heat exchange between the low-temperature vapor refrigerant and the high-temperature liquid refrigerant of the air conditioner to continuously improve the subcooling degree of the air conditioner, increase and improve the performance of the entire air conditioning refrigeration system, and produce good results: increase the cooling capacity of the air conditioner, increase the energy efficiency ratio, and achieve the purpose of reducing costs and increasing efficiency.

[0023] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. The embodiments described in the present invention are merely descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. The various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction, and such combinations should also be regarded as the contents disclosed in the present disclosure as long as they do not violate the concept of the present invention. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0024] The present invention is not limited to the specific details of the above-mentioned embodiments. Within the technical concept of the present invention and without departing from the design concept of the present invention, various modifications and improvements made to the technical solution of the present invention by technical personnel in this field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have been fully recorded in the claims.

Claims

1. An air conditioning cooling type subcooling device, 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), wherein the outlet of the compressor (1) in the refrigeration system 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, and the outlet of the evaporating heat exchanger (6) is connected to the return port of the compressor (1) through a second connecting pipeline (8), characterized in that: It comprises 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), wherein the circumferential side surfaces of the first connecting pipeline (3) and the second connecting pipeline (8) are in contact with each other.

2. The air conditioning cooling type supercooling device according to claim 1, characterized in that: The first connecting pipeline (3) and the second connecting pipeline (8) are both copper pipes.

3. The air conditioning cooling type supercooling device according to claim 1, characterized in that: A heat conduction plate is provided between the circumferential side surfaces of the first connecting pipeline (3) and the second connecting pipeline (8), and the circumferential side surface of the first connecting pipeline (3) is in contact and connected with the circumferential side surface of the second connecting pipeline (8) via the heat conduction plate.

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