Refrigerating device and air conditioner

Abstract

The application discloses a refrigerating device and an air conditioner. The refrigerating device comprises a compressor, a condenser, a regenerator, a throttle valve and an evaporator. The output end of the compressor, the condenser, the regenerator, the throttle valve, the evaporator, the regenerator and the input end of the compressor are sequentially communicated to form a refrigeration cycle loop. A supercooling assembly is arranged between the condenser and the regenerator, and the supercooling assembly is used for cooling refrigerant in the refrigeration cycle loop. The refrigerant in the refrigeration cycle loop is further cooled through the supercooling assembly, so that the refrigerant can absorb more heat when vaporizing in the evaporator, and the refrigeration effect of the refrigerating device is improved.

Description

Technical Field

[0001] This invention relates to the field of refrigeration technology, and more specifically, to a refrigeration device. Furthermore, this invention also relates to an air conditioner comprising the aforementioned refrigeration device. Background Technology

[0002] In air conditioning systems, cooling efficiency is a crucial indicator of its cooling performance. Currently, one of the key factors limiting air conditioning cooling efficiency is condenser cooling efficiency. Common condensation methods include air cooling, water cooling, coaxial cooling, evaporation, and spray cooling. However, the cooling effect of the condenser is limited under these methods. As the condenser continues to operate for a long time, it will cause problems such as heat accumulation, high energy consumption, and untimely cooling, resulting in poor cooling performance and affecting the user experience.

[0003] In conclusion, how to improve the cooling effect of air conditioning systems is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the object of the present invention is to provide a refrigeration device that cools the refrigerant in the refrigeration cycle by setting a subcooling component, so that the refrigerant can absorb more heat when it vaporizes in the evaporator, thereby improving the refrigeration effect of the refrigeration device.

[0005] Another object of the present invention is to provide an air conditioner including the above-described refrigeration device.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A refrigeration device includes a compressor, a condenser, a regenerator, a throttling valve, and an evaporator. The output end of the compressor, the condenser, the regenerator, the throttling valve, the evaporator, the regenerator, and the input end of the compressor are sequentially connected to form a refrigeration cycle loop. A subcooling component is provided between the condenser and the regenerator, and the subcooling component is used to cool the refrigerant in the refrigeration cycle loop.

[0008] Preferably, the subcooling component includes a cooling pipe with a radiative cooling film disposed on the cooling pipe.

[0009] Preferably, the subcooling component further includes a radiation component, and the cooling pipe is disposed within the radiation component. The radiation component is used to reflect solar radiation and release heat.

[0010] Preferably, the radiating component includes a glass cover and a mid-infrared reflector, and the cooling pipe is disposed in the space formed by the glass cover and the mid-infrared reflector.

[0011] Preferably, the glass cover is disposed on the upper side of the cooling pipe, and the top of the glass cover is provided with the radiative cooling film.

[0012] Preferably, the mid-infrared reflector is located on the lower side of the cooling pipe, and the mid-infrared reflector is used to dissipate the heat after the refrigerant has undergone heat exchange.

[0013] Preferably, the cooling pipe is a serpentine pipe.

[0014] Preferably, the radiative cooling film includes an acrylic coating and a barium sulfate particle layer, wherein the barium sulfate particle layer is disposed on the acrylic coating.

[0015] The present invention also provides an air conditioner, including the refrigeration device described in any of the above claims.

[0016] The refrigeration device provided by this invention includes a compressor, a condenser, a regenerator, a throttling valve, and an evaporator. The compressor output, condenser, regenerator, throttling valve, evaporator, regenerator, and compressor input are sequentially connected to form a refrigeration cycle loop. The refrigerant circulates within this loop to achieve a cooling effect. Specifically, the refrigerant in the evaporator absorbs heat and vaporizes. The vaporized refrigerant is then transported from the output to the regenerator input for preheating. The preheated refrigerant vapor passes through the compressor to form a high-temperature, high-pressure gas. This high-temperature, high-pressure gas is condensed into a liquid state in the condenser. The refrigerant, after being cooled by the regenerator and depressurized by the expansion valve, returns to the input end of the evaporator to vaporize and absorb heat, thus achieving a cooling effect. Based on the above refrigeration cycle, a subcooling component is added between the condenser and the regenerator. That is, the output end of the compressor, the condenser, the subcooling component, the regenerator, the expansion valve, the evaporator, the regenerator, and the input end of the compressor are connected in sequence to form the refrigeration cycle of the refrigeration device provided by the present invention. The subcooling component further cools the refrigerant in the refrigeration cycle so that the refrigerant can absorb more heat when it vaporizes in the evaporator, thereby improving the cooling effect of the refrigeration device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the refrigeration device provided by the present invention;

[0019] Figure 2This is a schematic diagram of the structure of the supercooled component provided by the present invention;

[0020] Figure 3 for Figure 2 The main view;

[0021] Figure 4 This is a side view of the supercooled component provided by the present invention.

[0022] Figures 1-4 In the accompanying drawings, the reference numerals include:

[0023] 1. Compressor; 2. Condenser; 3. Subcooling assembly; 4. Regenerator; 5. Expansion valve; 6. Evaporator;

[0024] Mid-infrared reflector 31, cooling pipe 32, glass cover 33, radiation cooling film 34. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] The core of this invention is to provide a refrigeration device that, through the arrangement of the subcooling component 3, can further cool the refrigerant in the refrigeration cycle, allowing the refrigerant to absorb more heat when vaporizing in the evaporator 6, thereby improving the refrigeration effect of the device. Another core aspect of this invention is to provide an air conditioner that includes the aforementioned refrigeration device.

[0027] The refrigeration device provided by this invention includes a compressor 1, a condenser 2, a subcooling assembly 3, a regenerator 4, a throttling valve 5, and an evaporator 6. Please refer to [reference needed]. Figure 1 .

[0028] The output end of compressor 1, condenser 2, regenerator 4, expansion valve 5, evaporator 6, regenerator 4, and input end of compressor 1 are connected in sequence to form a refrigeration cycle loop, in which the refrigerant circulates to achieve cooling.

[0029] Furthermore, a subcooling assembly 3 is provided between the condenser 2 and the regenerator 4. That is, the output end of the compressor 1, the condenser 2, the subcooling assembly 3, the regenerator 4, the throttle valve 5, the evaporator 6, the regenerator 4, and the input end of the compressor 1 are connected in sequence through pipelines to form a circulating cooling circuit of the refrigeration device provided by the present invention. The refrigerant circulates in the circulating circuit to perform cooling operations.

[0030] Specifically, compressor 1 compresses the low-temperature, low-pressure gaseous refrigerant to a high-temperature, high-pressure state and delivers it to the input end of condenser 2. The high-temperature, high-pressure gaseous refrigerant condenses into a liquid in condenser 2 and is then delivered to the input end of subcooling assembly 3. Subcooling assembly 3 further cools the refrigerant at the output end of condenser 2 to a subcooled state. The medium-temperature, high-pressure subcooled refrigerant is cooled by regenerator 4 and then delivered to expansion valve 5. After being depressurized to evaporation pressure by expansion valve 5, it is delivered to evaporator 6. In evaporator 6, it evaporates and absorbs heat, achieving a cooling effect. The gas evaporated in evaporator 6 is preheated by regenerator 4 and then re-enters compressor 1, completing the refrigerant cycle. Please refer to the following for details. Figure 1 The direction of the arrow indicates the loop process.

[0031] In the above refrigeration cycle, the subcooling component 3 is located between the output end of the condenser 2 and the input end of the regenerator 4. The subcooling component 3 can further cool the refrigerant at the output end of the condenser 2 so that the refrigerant can reach a subcooled state and have more cooling capacity. After being cooled by the regenerator 4 and depressurized by the throttling valve 5, it is delivered to the evaporator 6 to perform evaporation, heat absorption and release of cooling capacity, thereby improving the cooling effect. The subcooling component 3 can realize the energy-free passive cooling of the refrigerant, ensuring that the condenser 2 can still maintain a good cooling effect of the refrigeration device even after long-term operation, thus improving the user experience.

[0032] The supercooling component 3 can be placed on the roof or in any location, offering high flexibility and applicability.

[0033] The regenerator 4 and the subcooling component 3 are connected by an insulated pipe to ensure that the refrigerant in the subcooled state is transported with less cold loss, thus ensuring better cold utilization and improving the cooling effect and efficiency.

[0034] The aforementioned refrigeration device includes a compressor 1, a condenser 2, a subcooling assembly 3, a regenerator 4, a throttle valve 5, and an evaporator 6. The output end of the compressor 1, the condenser 2, the subcooling assembly 3, the regenerator 4, the throttle valve 5, the evaporator 6, the regenerator 4, and the input end of the compressor 1 are sequentially connected to form a refrigeration cycle loop. The refrigerant circulates in the refrigeration cycle loop to achieve a cooling effect. Specifically, the refrigerant is compressed to a high temperature and high pressure state by the compressor 1 and delivered to the condenser 2. The high temperature and high pressure gaseous refrigerant condenses into a liquid state in the condenser 2, and the subcooling assembly 3 condenses the liquid refrigerant into a liquid state. The refrigerant is further cooled to a subcooled state. The subcooled refrigerant is further cooled by the regenerator 4 and depressurized by the throttle valve 5 before being sent to the evaporator 6. The refrigerant evaporates and absorbs heat in the evaporator 6. The gaseous refrigerant formed by evaporation is preheated by the regenerator 4 and then sent to the compressor, thereby realizing the refrigeration cycle. In the above refrigeration cycle loop, a subcooling component 3 is connected between the condenser 2 and the regenerator 4. The subcooling component 3 further cools the refrigerant in the refrigeration cycle loop to a subcooled state so that the refrigerant can absorb more heat when evaporating in the evaporator 6, thereby improving the refrigeration effect of the refrigeration device.

[0035] Based on the above embodiments, the supercooling component 3 includes a cooling pipe 32, and a radiation cooling film 34 is provided on the cooling pipe 32.

[0036] The subcooling assembly 3 includes a cooling pipe 32, which has an inlet and an outlet for connecting to the condenser 2 and the regenerator 4, respectively.

[0037] A radiative cooling film 34 is provided on the cooling pipe 32. The radiative cooling film 34 can quickly dissipate the heat generated by the refrigerant liquid during the heat exchange in the cooling pipe 32, thereby improving the cooling effect of the refrigerant.

[0038] Without requiring a large floor space, the cooling pipe 32 can be composed of pipes of various shapes to ensure that the refrigerant is adequately cooled.

[0039] Optionally, the cooling pipe 32 can be an S-type, W-type, Z-type, N-type, or other pipe with a bend, which allows the refrigerant to flow fully within the pipe and improves the cooling effect.

[0040] Based on any of the above embodiments, the supercooling component 3 also includes a radiation component, with the cooling pipe 32 disposed inside the radiation component, which is used to reflect solar radiation and release heat.

[0041] The cooling pipe 32 is located inside the radiant assembly. When the refrigerant is cooled inside the cooling pipe 32, the radiant assembly can reflect solar radiation to prevent the refrigerant from heating up. In addition, the radiant assembly can also release the heat generated when the refrigerant undergoes heat exchange inside the cooling pipe 32. By setting up the radiant assembly, the cooling effect of the refrigerant inside the cooling pipe 32 can be guaranteed, ensuring cooling efficiency and cooling quality.

[0042] In this embodiment, the specific structural form of the radiating component is not limited; it can be a plate-type, box-type, or other similar radiating component.

[0043] By setting up radiant components, radiant cooling is efficiently coupled with the vapor compression cycle in the cooling loop, thereby improving the radiant cooling effect and cooling efficiency of the refrigeration unit.

[0044] Based on any of the above embodiments, the radiation assembly includes a glass cover plate 33 and a mid-infrared reflector 31, and a cooling pipe 32 is disposed in the space formed by the glass cover plate 33 and the mid-infrared reflector 31.

[0045] Please refer to Figures 2 to 4 The cooling pipe 32 is located in the space formed by the glass cover plate 33 and the mid-infrared reflector 31. The cooling pipe 32 does not contact the glass cover plate 33 or the mid-infrared reflector 31, so that the refrigerant can concentrate and fully exchange heat and cold in the space and be fully cooled in the cooling pipe 32, thereby improving the cooling effect and cooling efficiency of the refrigeration device.

[0046] The glass cover 33 can absorb or dissipate the heat during heat exchange of the refrigerant in the cooling pipe 32, thereby improving the further cooling effect of the refrigerant.

[0047] Mid-infrared reflector 31 is used to quickly dissipate heat from the surface of cooling pipe 32 during the heat exchange process of the refrigerator, thereby improving the exchange efficiency. Please refer to [reference needed]. Figure 2 The arrow direction on the outer periphery of the intermediate cooling pipe 32.

[0048] Based on any of the above embodiments, a glass cover plate 33 is disposed on the upper side of the cooling pipe 32, and a radiation cooling film 34 is provided on the top of the glass cover plate 33.

[0049] Please refer to Figures 2 to 4 When the refrigeration device provided by the present invention is used, it is placed directly on the roof of the building. The glass cover plate 33 is located on the upper side of the cooling pipe 32 and the top of the entire refrigeration device. The glass cover plate 33 can absorb the 8-13 μm thermal radiation energy emitted by the surface of the pipe when the refrigerant in the cooling pipe 32 exchanges heat, and further dissipate the heat to the outside through the radiation cooling film 34 on the surface of the glass cover plate 33, thereby improving the cooling effect of the refrigerant.

[0050] In addition, the radiation cooling film 34 installed on the top of the glass cover 33 can directly receive solar radiation and reflect it efficiently under the action of the reflector, so that the heat on the light is blocked from being transmitted, ensuring that the refrigerant in the cooling pipe 32 on the lower side of the glass cover 33 will not experience a significant temperature rise. Figure 2 The arrows on the middle glass cover 33 can visually show the process of sunlight reflection.

[0051] Based on any of the above embodiments, the mid-infrared reflector 31 is disposed on the lower side of the cooling pipe 32. The mid-infrared reflector 31 is used to dissipate the heat after the refrigerant has undergone heat exchange into the low-temperature space, thereby achieving the concentrated radiation cooling effect of the cooling pipe 32.

[0052] Please refer to Figures 1 to 4 The mid-infrared reflector 31 is preferably V-shaped to enhance heat transfer. The cooling pipes 32 are concentrated within its internal space, achieving all-round concentrated radiative cooling, saving materials, and reducing operating costs. In addition, a glass cover 33 is located on top of the mid-infrared reflector 31 to reflect solar radiation during operation, ensuring the cooling effect of the refrigerant. Figure 2 The light inside the mid-infrared reflector 31 can visually display the entire process of infrared thermal radiation.

[0053] The mid-infrared reflector 31 is formed by bending a 4.5mm thick high-purity aluminum plate. A 200nm titanium dioxide thin film is deposited on its surface using magnetron sputtering technology, which has good thermal conductivity and high light transmittance.

[0054] Based on the thermal radiation wavelength modulation technology of the reflector surface material, the emissivity of the mid-infrared reflector 31 is greatly increased in the 8-13μm atmospheric window band, which enhances the radiative heat exchange between the mid-infrared reflector 31 and the low-temperature outer space cold source. This can release the thermal radiation of the lower surface of the cooling pipe 32 between the mid-infrared reflector 31 and the glass cover plate 33 into the low-temperature space, improve the radiative cooling effect, improve the cooling degree of the refrigerant, and thus improve the cooling efficiency of the refrigeration device.

[0055] Based on any of the above embodiments, the cooling pipe 32 is a serpentine pipe.

[0056] Please refer to Figure 2 , Figure 3 By setting the cooling pipe 32 as a serpentine pipe 32, the refrigerant can flow fully in the pipe to carry out the cooling operation, so that the refrigerant has more cooling capacity and improves the cooling effect and cooling efficiency of the refrigeration device.

[0057] Based on any of the above embodiments, the radiation cooling film 34 includes an acrylic coating and a barium sulfate particle layer, wherein the barium sulfate particle layer is disposed on the acrylic coating.

[0058] Please refer to Figures 1 to 4 An acrylic coating serves as the base, and a layer of barium sulfate particles is coated on the acrylic coating to form a radiative cooling film 34.

[0059] The thickness of the radiation cooling film 34 is preferably about 150 μm, the diameter of the barium sulfate particles is about 400 nm, and the volume fraction of barium sulfate is about 6%.

[0060] After designing the refrigeration unit, a simple analysis of its performance was conducted based on theoretical analysis, as follows:

[0061] The device uses refrigerant R600a with a flow rate of 0.006316 kg / s. The input temperature of condenser 2 is Tc = 55℃, and the output temperature of evaporator 6 is TE = 6℃. The initial cooling power is 2500W, the net radiant power of the radiant cooling film 34 is 96W / m², the isentropic efficiency of compressor 1 is 80%, the heat loss is 8%, the superheat is 6℃, the subcooling is 5℃, and the initial coefficient of performance (COP) is 3.709. After adding the subcooling component 3, the subcooling ΔT = 5.8℃ can be calculated using the specific heat formula, an increase of 0.8℃. Simultaneously, using Coolpack software (refrigeration simulation design software), the final COP* = 3.888 is calculated, representing a 4.83% improvement in COP.

[0062] Taking Beijing as an example, if all 7 million households and 700,000 buildings have residents on the fifth floor or higher, this cooling device can be installed. During specific periods in the hot summer months (June to August) (12:00-18:00, 22:00-07:00 the next day), running the device for 15 hours daily can save 1.5309 million kilowatt-hours of electricity per day, resulting in annual electricity savings of 141 million kilowatt-hours, equivalent to saving 140,900 tons of standard coal.

[0063] Based on the above analysis, it can be seen that the refrigeration device provided by the present invention is energy-saving and environmentally friendly, effectively improves the refrigeration effect, and has strong application and promotion value.

[0064] In addition to the refrigeration device described above, the present invention also provides an air conditioner that includes the refrigeration device disclosed in the above embodiments. The structure of other parts of the air conditioner is described in the prior art and will not be repeated here.

[0065] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0066] The refrigeration device and air conditioner provided by the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A refrigeration device, characterized in that, The system includes a compressor (1), a condenser (2), a regenerator (4), a throttle valve (5), and an evaporator (6). The output end of the compressor (1), the condenser (2), the regenerator (4), the throttle valve (5), the evaporator (6), the regenerator (4), and the input end of the compressor (1) are sequentially connected to form a refrigeration cycle loop. A subcooling assembly (3) is provided between the condenser (2) and the regenerator (4), and the subcooling assembly (3) is used to cool the refrigerant in the refrigeration cycle loop. The supercooling component (3) includes a cooling pipe (32) and a radiation component. The cooling pipe (32) is located inside the radiation component, which is used to reflect solar radiation and release heat. The radiation assembly includes a glass cover plate (33) and a mid-infrared reflector (31). The cooling pipe (32) is located in the space formed by the glass cover plate (33) and the mid-infrared reflector (31). The cooling pipe (32) does not contact the glass cover plate (33) or the mid-infrared reflector (31). The mid-infrared reflector (31) is V-shaped, and the cooling pipes (32) are concentrated in the V-shaped space to achieve all-round concentrated radiation cooling. The mid-infrared reflector (31) is formed by bending a high-purity aluminum plate and has a 200nm titanium dioxide film coated on its surface. This increases the emissivity of the mid-infrared reflector (31) in the 8~13μm atmospheric window band and enhances the radiative heat exchange between the mid-infrared reflector (31) and the low-temperature outer space cold source.

2. The refrigeration device according to claim 1, characterized in that, The cooling pipe (32) is provided with a radiative cooling film (34).

3. The refrigeration device according to claim 2, characterized in that, The glass cover plate (33) is located on the upper side of the cooling pipe (32), and the top of the glass cover plate (33) is provided with the radiative cooling film (34).

4. The refrigeration device according to claim 3, characterized in that, The mid-infrared reflector (31) is located on the lower side of the cooling pipe (32), and the mid-infrared reflector (31) is used to dissipate the heat after the refrigerant has undergone heat exchange.

5. The refrigeration apparatus according to any one of claims 2 to 4, characterized in that, The cooling pipe (32) is a serpentine pipe.

6. The refrigeration device according to claim 5, characterized in that, The radiation cooling film (34) includes an acrylic coating and a barium sulfate particle layer, wherein the barium sulfate particle layer is disposed on the acrylic coating.

7. An air conditioner, characterized in that, Includes the refrigeration device as described in any one of claims 1 to 6.

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