Air conditioning system

Abstract

The utility model provides an air conditioning system which comprises an outdoor heat exchanger, an outdoor supercooling pipe fitting, an indoor supercooling pipe fitting and an indoor heat exchanger which are sequentially communicated, the indoor supercooling pipe fitting is arranged below the indoor heat exchanger, and the outdoor supercooling pipe fitting is arranged below the outdoor heat exchanger. Under the refrigeration condition, on one hand, the outdoor supercooling pipe fitting is cooled through the condensate water generated by the outdoor heat exchanger, and on the other hand, the indoor supercooling pipe fitting is cooled through the condensate water generated by the indoor heat exchanger, so that a refrigerant can obtain the ideal supercooling degree, and the refrigeration efficiency of the air conditioning system is improved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to an air conditioning system. Background Art

[0002] In the related art, the refrigerant in the air-conditioning system cannot obtain a relatively ideal supercooling degree before throttling, resulting in the refrigeration efficiency of the air-conditioning system being unable to better meet the needs of efficient refrigeration and heat exchange. Utility Model Content

[0003] The utility model provides an air conditioning system to solve the technical problem of low refrigeration efficiency of the air conditioning system in the related art.

[0004] To achieve the above-mentioned purpose, the present application proposes an air-conditioning system, comprising an indoor heat exchanger, an indoor subcooling pipe, an outdoor subcooling pipe and an outdoor heat exchanger connected in sequence, wherein the indoor subcooling pipe is arranged below the indoor heat exchanger, and the outdoor subcooling pipe is arranged below the outdoor heat exchanger.

[0005] Optionally, in one embodiment, it further includes an indoor water receiving pan, wherein the indoor water receiving pan is arranged below the indoor heat exchanger, and the indoor supercooling pipe is arranged in the indoor water receiving pan.

[0006] Optionally, in one embodiment, the indoor water receiving tray is provided with a water receiving trough, and the indoor supercooling pipe is arranged in the water receiving trough.

[0007] Optionally, in one embodiment, it also includes an outdoor water receiving pan, the outdoor supercooling pipe is arranged on the outdoor water receiving pan, and the outdoor water receiving pan is connected to the indoor water receiving pan; a connected overflow pipe is arranged between the outdoor water receiving pan and the indoor water receiving pan, and the overflow pipe is used to transport the condensed water overflowing from the indoor water receiving pan to the outdoor water receiving pan.

[0008] Optionally, in one embodiment, it further includes an outdoor water receiving pan, wherein the outdoor water receiving pan is arranged below the outdoor heat exchanger, and the outdoor subcooling pipe is arranged in the outdoor water receiving pan.

[0009] Optionally, in one embodiment, an economizer is further included, and the economizer is connected to the indoor heat exchanger and the indoor subcooling pipe.

[0010] Optionally, in one embodiment, a stop valve and a temperature sensor are further included, wherein two ends of the stop valve are respectively connected to the refrigerant inlet and the air supply port of the economizer, and the temperature sensor is configured to collect the return air temperature of the economizer; when the return air temperature of the economizer is higher than the set temperature, the stop valve opens.

[0011] Optionally, in one embodiment, an indoor fan is further included, and the indoor fan is arranged toward the indoor supercooling pipe to dissipate heat from the indoor supercooling pipe.

[0012] Optionally, in one embodiment, the indoor subcooling pipe is provided with fins, and the fins are higher than the notches of the water receiving trough.

[0013] Optionally, in one embodiment, an outdoor fan is further included, and the outdoor fan is arranged toward the outdoor supercooling pipe to dissipate heat from the outdoor supercooling pipe.

[0014] The air-conditioning system provided by the present application arranges an outdoor supercooling pipe fitting and an indoor supercooling pipe fitting between the indoor heat exchanger and the indoor heat exchanger. On the one hand, the outdoor supercooling pipe fitting is arranged below the outdoor heat exchanger, and the condensed water generated by the outdoor heat exchanger is used to drip onto the outdoor supercooling pipe fitting to cool the refrigerant flowing out of the outdoor heat exchanger to the outdoor supercooling pipe fitting, thereby realizing primary cooling of the refrigerant. On the other hand, the indoor supercooling pipe fitting is arranged below the indoor heat exchanger, and the condensed water generated by the indoor heat exchanger is used to drip onto the indoor supercooling pipe fitting to cool the refrigerant flowing through the indoor supercooling pipe fitting to realize secondary cooling of the refrigerant. After the above-mentioned secondary cooling, the refrigerant enters the economizer, and the deviation between the return air temperature and the set temperature is detected by a temperature sensor, and the opening of the stop valve is adjusted to adjust the flow rate of the low-temperature refrigerant coming out of the indoor heat exchanger and entering the economizer for tertiary cooling. After the above-mentioned three-stage cooling, the refrigerant is throttled and enters the indoor heat exchanger, so that the refrigerant can obtain a relatively ideal supercooling degree, thereby effectively improving the refrigeration efficiency of the air-conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0016] Figure 1 This is a schematic diagram of the operating logic of the air conditioning system of this application.

[0017] Description of Figure Numbers:

[0018] 1. Indoor heat exchanger; 2. Indoor subcooling pipes; 3. Outdoor heat exchanger; 4. Outdoor subcooling pipes; 5. Economizer; 6. Stop valve; 7. Compressor; 8. Four-way valve; 9. First throttle valve; 10. Second throttle valve; 11. Indoor fan; 12. Outdoor fan.

[0019] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0021] The embodiment of the present application provides an air conditioning system to solve the problem of low heat exchange efficiency of an outdoor heat exchanger. The system will be described below in conjunction with the accompanying drawings.

[0022] In the embodiments of the present application, Figure 1 As shown, the air conditioning system comprises an outdoor heat exchanger 3, an outdoor subcooling pipe 4, an indoor subcooling pipe 2 and an indoor heat exchanger 1 which are connected in sequence, the indoor subcooling pipe 2 is arranged below the indoor heat exchanger 1, and the outdoor subcooling pipe 4 is arranged below the outdoor heat exchanger 3. In this way, under the refrigeration condition, on the one hand, the outdoor subcooling pipe 4 is arranged below the outdoor heat exchanger 3, and the condensed water generated by the outdoor heat exchanger 3 is dripped onto the outdoor subcooling pipe 4 to cool the refrigerant flowing from the outdoor heat exchanger 3 to the outdoor subcooling pipe 4, so as to realize the primary cooling of the refrigerant, and on the other hand, the indoor subcooling pipe 2 is arranged below the indoor heat exchanger 1, and the condensed water generated by the indoor heat exchanger 1 is dripped onto the indoor subcooling pipe 2 to cool the refrigerant flowing through the indoor subcooling pipe 2, so as to realize the secondary cooling of the refrigerant, and the refrigerant enters the indoor heat exchanger 1 after the above-mentioned secondary cooling, so that the refrigerant can obtain a relatively ideal degree of subcooling, and effectively improve the refrigeration efficiency of the air conditioning system.

[0023] In some embodiments, Figure 1 As shown, the air conditioning system further includes an indoor water receiving pan, which is arranged below the indoor heat exchanger 1, and the indoor subcooling pipe 2 is arranged in the indoor water receiving pan. In this way, the indoor water receiving pan can store the condensed water that has not dripped onto the indoor subcooling pipe 2, and make it contact with the indoor subcooling pipe 2 for heat exchange, and can also promote the heat conduction of the indoor subcooling pipe 2, and further improve the subcooling degree of the refrigerant in the indoor subcooling pipe 2.

[0024] In some embodiments, Figure 1 As shown, the indoor water receiving tray is provided with a water receiving trough, and the indoor supercooling pipe 2 is arranged in the water receiving trough. In this way, the water receiving trough can store condensed water so that it cannot be lost, and the indoor supercooling pipe 2 is immersed in the condensed water to improve the cooling effect.

[0025] In some embodiments, Figure 1As shown, the air conditioning system also includes an outdoor water receiving pan, and an outdoor supercooling pipe 4 is arranged on the outdoor water receiving pan, and the outdoor water receiving pan is connected to the indoor water receiving pan; an overflow pipe is arranged between the outdoor water receiving pan and the indoor water receiving pan, and the overflow pipe is used to transport the condensed water overflowing from the indoor water receiving pan to the outdoor water receiving pan. Here, the excess condensed water in the water receiving tank is reused for cooling the outdoor supercooling pipe 4, and the condensed water generated by the indoor heat exchanger 1 is lower in temperature than the condensed water generated by the outdoor heat exchanger 3, so the heat exchange efficiency of the outdoor supercooling pipe 4 can be further improved, and the subcooling degree of the refrigerant can be increased. In addition, the outdoor supercooling pipe 4 can be immersed in the condensed water in the outdoor water receiving pan to improve the cooling effect.

[0026] In some embodiments, Figure 1 As shown, the air conditioning system further includes an outdoor water receiving pan, which is arranged below the outdoor heat exchanger 3, and the outdoor subcooling pipe 4 is arranged in the outdoor water receiving pan. In this way, the outdoor water receiving pan can store a part of the condensed water that does not directly drip onto the outdoor subcooling pipe 4, and make it contact with the indoor subcooling pipe 2 for heat exchange, and can also improve the heat conduction efficiency of the outdoor subcooling pipe 4, and promote the cooling of the refrigerant.

[0027] In some embodiments, Figure 1 As shown, the air conditioning system also includes an economizer 5, which is connected to the indoor heat exchanger 1 and the indoor subcooling pipe 2. It should be noted that the economizer 5 refers to a structure that throttles the refrigerant flowing through the economizer 5 and makes it evaporate and absorb heat so that another part of the refrigerant is subcooled. In this way, the economizer 5 is used to increase the subcooling degree of the refrigerant before it enters the indoor heat exchanger 1; before the refrigerant enters the indoor heat exchanger 1 from the outdoor heat exchanger 3, it undergoes three-stage cooling of the outdoor subcooling pipe 4, the indoor subcooling pipe 2 and the economizer 5, and has a relatively ideal subcooling degree.

[0028] In some embodiments, Figure 1 As shown, the air conditioning system also includes a stop valve 6 and a temperature sensor. The two ends of the stop valve 6 are respectively connected to the refrigerant inlet and the air supply port of the economizer 5. The temperature sensor is configured to collect the return air temperature of the economizer 5. When the return air temperature of the economizer 5 is higher than the set temperature, the stop valve 6 is opened, and the opening of the stop valve 6 is adjusted by the air conditioning system. It should be noted that the return air of the economizer 5 usually re-enters the compressor 7 of the air conditioning system. When the return air temperature of the economizer 5 is higher than the set temperature, the stop valve 6 can be opened to increase the amount of refrigerant directly returning to the compressor 7 from the bypass branch where the stop valve 6 is located, and reduce the amount of refrigerant flowing through the economizer 5 and performing heat exchange, thereby reducing the return air temperature at the return air port of the compressor 7, which can reduce exhaust gas and ensure the service life of the compressor 7.

[0029] In some embodiments, Figure 1As shown, the air conditioning system further includes an indoor fan 11, which is arranged toward the indoor supercooling pipe 2 to dissipate heat from the indoor supercooling pipe 2. In this way, the indoor fan 11 blows the indoor air with a lower temperature toward the indoor supercooling pipe 2, and the coldness of the indoor air can be used to increase the supercooling degree of the refrigerant in the indoor supercooling pipe 2.

[0030] In some embodiments, Figure 1 As shown, the indoor supercooling pipe 2 is provided with fins, and the fins are higher than the notch of the water receiving tank. In this way, the heat exchange area of ​​the indoor supercooling pipe 2 is increased by the fins, and the airflow generated by the indoor fan 11 can repeatedly contact the fins higher than the notch of the water receiving tank, thereby improving the heat exchange efficiency.

[0031] In some embodiments, Figure 1 As shown, the air conditioning system further includes an outdoor fan 12, which is arranged toward the outdoor supercooling pipe 4 to dissipate heat from the outdoor supercooling pipe 4. In this way, the heat loss of the outdoor supercooling pipe 4 is increased by the outdoor fan 12, and the heat exchange efficiency of the outdoor supercooling pipe 4 is improved.

[0032] In some embodiments, Figure 1 As shown, the air conditioning system further includes a compressor 7, a first throttle valve 9 and a second throttle valve 10. A four-way valve 8 is also provided between the compressor 7 and the outdoor heat exchanger 3 to connect the two. The four-way valve 8 is also used to connect the compressor 7 and the economizer 5 or the stop valve 6. In the cooling mode, the flow direction of the refrigerant is: compressor 7—four-way valve 8—outdoor heat exchanger 3—outdoor subcooling pipe 4—indoor subcooling pipe 2—economizer 5—throttle valve—indoor heat exchanger 1—second throttle valve 10 and economizer 5 (or stop valve 6)—four-way valve 8—compressor 7, as shown in FIG. Figure 1 In the heating mode, the flow direction of the refrigerant is: compressor 7—four-way valve 8—stop valve 6—indoor heat exchanger 1—first throttle valve 9—economizer 5—indoor subcooling pipe 2—outdoor subcooling pipe 4—outdoor heat exchanger 3—four-way valve 8—compressor 7. Figure 1 As shown by the gray arrow. Figure 1 As shown in , the structure surrounded by the dotted line in the upper half of the figure is the outdoor side, and the structure surrounded by the dotted line in the lower half of the figure is the indoor side.

[0033] In the above embodiments, the description of each embodiment has its own emphasis. For parts not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. In the description of this application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0034] The air-conditioning system provided in the embodiment of the present application is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An air conditioning system, characterized in that: It comprises an outdoor heat exchanger (3), an outdoor subcooling pipe (4), an indoor subcooling pipe (2) and an indoor heat exchanger (1) which are connected in sequence, wherein the indoor subcooling pipe (2) is arranged below the indoor heat exchanger (1), and the outdoor subcooling pipe (4) is arranged below the outdoor heat exchanger (3).

2. An air conditioning system according to claim 1, characterized in that: It also comprises an indoor water receiving pan, the indoor water receiving pan being arranged below the indoor heat exchanger (1), and the indoor supercooling pipe (2) being arranged in the indoor water receiving pan.

3. An air conditioning system according to claim 2, characterized in that: The indoor water receiving tray is provided with a water receiving trough, and the indoor supercooling pipe (2) is arranged in the water receiving trough.

4. An air conditioning system according to claim 2, characterized in that: It also includes an outdoor water receiving pan, the outdoor supercooling pipe (4) is arranged on the outdoor water receiving pan, and the outdoor water receiving pan is connected to the indoor water receiving pan; an overflow pipe is arranged between the outdoor water receiving pan and the indoor water receiving pan, and the overflow pipe is used to transport the condensed water overflowing from the indoor water receiving pan to the outdoor water receiving pan.

5. An air conditioning system according to claim 1, characterized in that: It also comprises an outdoor water receiving pan, the outdoor water receiving pan being arranged below the outdoor heat exchanger (3), and the outdoor subcooling pipe (4) being arranged in the outdoor water receiving pan.

6. An air conditioning system according to claim 1, characterized in that: It also includes an economizer (5), which is connected to the indoor heat exchanger (1) and the indoor subcooling pipe (2).

7. An air conditioning system according to claim 6, characterized in that: It also includes a stop valve (6) and a temperature sensor, wherein the two ends of the stop valve (6) are respectively connected to the refrigerant inlet and the air supply port of the economizer (5), and the temperature sensor is configured to collect the return air temperature of the economizer (5); when the return air temperature of the economizer (5) is higher than the set temperature, the stop valve (6) opens.

8. An air conditioning system according to claim 3, characterized in that: It also includes an indoor fan (11), wherein the indoor fan (11) is arranged toward the indoor supercooling pipe (2) to dissipate heat from the indoor supercooling pipe (2).

9. An air conditioning system according to claim 8, characterized in that: The indoor subcooling pipe (2) is provided with fins, and the fins are higher than the notches of the water receiving tank.

10. An air conditioning system according to claim 1, characterized in that: It also includes an outdoor fan (12), wherein the outdoor fan (12) is arranged toward the outdoor supercooling pipe (4) to dissipate heat from the outdoor supercooling pipe (4).

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