CN218120237U - heat exchange system - Google Patents

Abstract

The utility model provides a heat exchange system, which comprises a compressor, a vortex tube, a first condenser, a first injection mechanism, a first evaporator and a gas-liquid separator, the inlet of the vortex tube is connected to the exhaust of the compressor The air port is connected. The heat exchange system provided by the utility model uses the first injection mechanism and the second injection mechanism to replace the throttle valve used in the prior art, thereby effectively reducing the throttling loss and effectively improving the heat exchange performance of the heat exchange system At the same time, the vortex effect of the vortex tube is used to divide the exhaust of the compressor, so that under the constant exhaust pressure, the condenser can provide higher heat exchange efficiency, and at the same time, the temperature of the refrigerant entering the evaporator is further reduced, increasing evaporation The heat exchange efficiency of the evaporator is improved, and multiple evaporators are installed at the same time to meet the needs of multi-temperature zone refrigeration, air conditioning adjustment, domestic hot water, etc., and improve the scope of application of the heat exchange system.

Description

heat exchange system

technical field

The utility model relates to the technical field of heat exchange, in particular to a heat exchange system.

Background technique

With the advancement of science and technology, people's living standards have improved, and energy consumption has also increased. Building energy consumption has become a giant of energy consumption, among which the HVAC industry accounts for the majority of energy consumption. In the context of the era of "carbon peaking and carbon neutrality", energy conservation and emission reduction are imminent.

In the traditional vapor compression refrigeration system, a single-stage compression cycle is mostly used to achieve refrigeration. When the indoor and outdoor temperature difference is large, the compression ratio provided by the compressor is too small, resulting in a decrease in the volumetric efficiency of the compressor and an increase in throttling loss. 1. The exhaust temperature is too high, the cooling (or heating) capacity is reduced, and the energy efficiency of operation is reduced; and the expansion valve is often used in the system for throttling and pressure reduction, resulting in the loss of mechanical energy after the throttling of the high-pressure working medium, which affects the system performance.

Utility model content

In order to solve the technical problem that the throttling loss of the steam heat exchange system in the prior art affects the performance of the system, a heat exchange system with a vortex tube and an ejector is provided to overcome the throttling loss.

A heat exchange system, comprising a compressor, a vortex tube, a first condenser, a first injection mechanism, a first evaporator and a gas-liquid separator, the inlet of the vortex tube communicates with the exhaust port of the compressor, The outlet of the hot end of the vortex tube communicates with the refrigerant inlet of the gas-liquid separator through the first condenser, and the outlet of the cold end of the vortex tube communicates with the main injection port of the first injection mechanism , the outlet of the first ejection mechanism communicates with the refrigerant inlet of the gas-liquid separator, the ejected port of the first ejection mechanism communicates with the first evaporator, and the first evaporator The first throttling mechanism communicates with the liquid refrigerant outlet of the gas-liquid separator, and the gas-liquid refrigerant outlet communicates with the suction port of the compressor.

The heat exchange system also includes a second injection mechanism and a second evaporator, the main injection port of the second injection mechanism communicates with the condenser, and the injected port of the second injection mechanism communicates with the condenser. The second evaporator communicates, the outlet of the second injection mechanism communicates with the refrigerant inlet of the gas-liquid separator, and the second evaporator communicates with the liquid refrigerant outlet of the gas-liquid separator.

The heat exchange system also includes an economizer and a second throttling mechanism, the economizer has a main pipeline and an auxiliary pipeline for mutual heat exchange, one end of the main pipeline is connected to the first condenser, the The other end of the main pipeline is connected to the main injection port of the second injection mechanism, one end of the auxiliary pipeline is connected to the first condenser through the second throttling mechanism, and the other end of the auxiliary pipeline is Connect to the air supply port of the compressor.

The heat exchange system further includes a third evaporator, a third condenser and a driving mechanism, the third evaporator, the third condenser and the driving mechanism are connected in sequence to form a heat exchange cycle, and the third The condenser exchanges heat with the liquid refrigerant in the gas-liquid separator.

A heat exchange coil is arranged in the gas-liquid separator, and the heat exchange coil constitutes the third condenser.

The refrigerant in the heat exchange cycle includes water or glycol solution.

The heat exchange system also includes a refrigeration mechanism, and the first evaporator is located in the refrigeration mechanism.

The heat exchange system further includes a refrigeration mechanism, and the second evaporator is located in the refrigeration mechanism.

The heat exchange system further includes a water heating mechanism, and the water heating mechanism communicates with the first condenser.

The refrigerant in the heat exchange system includes water vapor.

The heat exchange system provided by the utility model uses the first injection mechanism and the second injection mechanism to replace the throttle valve used in the prior art, thereby effectively reducing the throttling loss and effectively improving the heat exchange performance of the heat exchange system At the same time, the vortex effect of the vortex tube is used to divide the exhaust of the compressor, so that under the constant exhaust pressure, the condenser can provide higher heat exchange efficiency, and at the same time, the temperature of the refrigerant entering the evaporator is further reduced, increasing the evaporation The heat exchange efficiency of the evaporator is improved, and multiple evaporators are installed at the same time to meet the needs of multi-temperature zone refrigeration, air conditioning adjustment, domestic hot water, etc., and improve the scope of application of the heat exchange system.

Description of drawings

Fig. 1 is the structural representation of the heat exchange system that the utility model embodiment provides;

In the picture:

1. Compressor; 2. Vortex tube; 3. First condenser; 4. First injection mechanism; 5. First evaporator; 6. Gas-liquid separator; 7. Second injection mechanism; 8. Second injection mechanism Second evaporator; 9. Economizer; 10. Second throttling mechanism; 11. Third evaporator; 12. Third condenser; 13. Driving mechanism; 14. First throttling mechanism.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, not to limit the utility model.

The heat exchange system shown in Figure 1 includes a compressor 1, a vortex tube 2, a first condenser 3, a first injection mechanism 4, a first evaporator 5 and a gas-liquid separator 6, and the inlet of the vortex tube 2 It communicates with the exhaust port of the compressor 1, the hot end outlet of the vortex tube 2 communicates with the refrigerant inlet of the gas-liquid separator 6 through the first condenser 3, and the cold end of the vortex tube 2 communicates with the refrigerant inlet of the gas-liquid separator 6 through the first condenser 3 The end outlet communicates with the main injection port of the first injection mechanism 4, the outlet of the first injection mechanism 4 communicates with the refrigerant inlet of the gas-liquid separator 6, and the first injection mechanism 4 The ejected port of the first evaporator 5 communicates with the first evaporator 5, and the first evaporator 5 communicates with the liquid refrigerant outlet of the gas-liquid separator 6 through the first throttling mechanism 14, and the gas-liquid separator The gaseous refrigerant outlet of 6 communicates with the suction port of the compressor 1 . Use the first injection mechanism 4 and the second injection mechanism to replace the throttle valve used in the prior art, thereby effectively reducing the throttling loss, effectively improving the heat exchange performance of the heat exchange system, and using the vortex of the vortex tube 2 Effect, the exhaust of compressor 1 is divided, so that under constant exhaust pressure, the condensing mechanism (first condenser 3) can provide higher heat exchange efficiency, and at the same time, the temperature of the refrigerant entering the evaporating mechanism is further reduced, increasing The heat exchange efficiency of the evaporation mechanism (the first evaporator 5).

Specifically, the refrigerant discharged from the exhaust port of the compressor 1 is divided into two streams, one cold and one hot, under the action of the vortex tube 2, and one stream of refrigerant is discharged from the outlet of the hot end to the first condenser 3 for condensation and heat release. The refrigerant after heat exchange flows back into the gas-liquid separator 6, and another refrigerant enters the main injection port of the first injection mechanism 4 from the outlet of the cold end, and can return to the main injection port through the outlet of the first injection mechanism 4. In the gas-liquid separator 6, negative pressure will be generated at the ejected port of the first injection mechanism 4 at the same time, and the liquid refrigerant in the gas-liquid separator 6 will be sucked into the first evaporator 5 for heat exchange, and passed through the first evaporator 5. The refrigerant after heat exchange in the evaporator 5 flows back into the gas-liquid separator 6 under the action of the first ejection mechanism 4 to complete the entire heat exchange cycle of the heat exchange system. Wherein the temperature of the refrigerant discharged from the outlet of the hot end is higher than the temperature of the refrigerant discharged from the outlet of the cold end, the first condenser 3 can provide higher heat exchange efficiency, and at the same time the temperature of the refrigerant entering the first evaporator 5 is higher than that of the existing one. It is technically possible to further reduce and increase the heat exchange efficiency of the first evaporator 5 .

Optionally, the heat exchange system further includes a second injection mechanism 7 and a second evaporator 8, the main injection port of the second injection mechanism 7 communicates with the condenser, and the second injection The injection port of the mechanism 7 communicates with the second evaporator 8, the outlet of the second injection mechanism 7 communicates with the refrigerant inlet of the gas-liquid separator 6, and the second evaporator 8 communicates with the refrigerant inlet of the gas-liquid separator 6. The liquid refrigerant outlet of the gas-liquid separator 6 is connected. Utilize the refrigerant flowing into the gas-liquid separator 6 from the first condenser 3 to introduce the refrigerant after heat exchange in the second evaporator 8 into the gas-liquid separator 6, thereby ensuring that the second evaporator 8 can The liquid refrigerant is obtained from the liquid separator 6 for heat exchange, and the refrigerant after heat exchange is returned to the gas-liquid separator 6 to complete the heat exchange cycle.

Optionally, the heat exchange system further includes an economizer 9 and a second throttling mechanism 10, the economizer 9 has a main pipeline and an auxiliary pipeline for mutual heat exchange, and one end of the main pipeline is connected to the second throttling mechanism. On a condenser 3, the other end of the main pipeline is connected to the main injection port of the second injection mechanism 7, and one end of the auxiliary pipeline is connected to the first condenser through a second throttling mechanism 10 3, the other end of the auxiliary pipeline is connected to the air supply port of the compressor 1. The economizer 9 is used to replenish air to increase the enthalpy of the compressor 1 to further improve the heat exchange capacity of the heat exchange system and improve the operating energy efficiency ratio, thereby increasing the adaptability of the heat exchange system to indoor and outdoor temperature differences.

Preferably, the economizer 9 is a plate heat exchanger or a casing heat exchanger.

In order to enable the heat exchange system to achieve the effect of multi-temperature zone heat exchange, the heat exchange system also includes a third evaporator 11, a third condenser 12 and a driving mechanism 13, the third evaporator 11, the third The condenser 12 and the driving mechanism 13 are sequentially connected to form a heat exchange cycle, and the third condenser 12 exchanges heat with the liquid refrigerant in the gas-liquid separator 6 . The refrigerant in the heat exchange cycle flows between the third evaporator 11 and the third condenser 12 driven by the driving mechanism 13, since the third condenser 12 can exchange the liquid refrigerant in the gas-liquid separator 6 heat, so that the refrigerant in the heat exchange cycle can release heat at the third condenser 12 and absorb heat at the third evaporator 11 to achieve heat exchange effect. Wherein the driving mechanism 13 is a power pump.

At the same time, the first evaporator 5 , the second evaporator 8 and the third evaporator 11 can be used to exchange heat in the three regions as required, so as to realize the heat exchange effect of the heat exchange system for multiple temperature zones. Of course, in order to further increase the number of temperature zones, multiple sets of third evaporators 11 , third condensers and driving mechanisms 13 can be selected to implement heat exchange for multiple temperature zones through multiple third evaporators 11 .

Preferably, the first evaporator 5 is the main evaporator, which mainly plays the role of ensuring the normal operation of the compressor 1. Compared with the second evaporator 8 and the third evaporator 11, the temperature is lower, and it is a low-temperature evaporator; the second evaporator The device 8 is still connected in series in the heat exchange cycle where the compressor 1 is located, so its temperature is higher than that of the third evaporator 11, which is a medium temperature evaporator; the third evaporator 11 is a surface cooler.

To this end, the heat exchange system further includes a refrigeration mechanism, the second evaporator 8 is located in the refrigeration mechanism, and the second evaporator 8 is used to realize the refrigeration function. Similarly, the heat exchange system further includes a refrigeration mechanism, and the first evaporator 5 is located in the refrigeration mechanism. The freezing function is realized by using the first evaporator 5 .

A heat exchange coil is arranged inside the gas-liquid separator 6 , and the heat exchange coil constitutes the third condenser 12 . That is, the gas-liquid separator 6 can be a shell-and-tube heat exchanger, and part or all of the heat exchange coil is below the liquid level of the shell-and-tube heat exchanger, so that the refrigerant in the heat exchange coil is cooled.

The refrigerant in the heat exchange cycle includes water or glycol solution.

The heat exchange system further includes a water heating mechanism, and the water heating mechanism communicates with the first condenser 3 . Utilizing the vortex effect of the vortex tube 2, the heat exchange system can be operated at a constant exhaust pressure, so that the first condenser 3 can provide a higher heat exchange effect, and can produce hot water at a higher temperature.

The refrigerant in the heat exchange system includes water vapor.

The above-mentioned embodiments only express several implementations of the utility model, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (10)

1. A heat exchange system, characterized in that: comprising a compressor (1), a vortex tube (2), a first condenser (3), a first injection mechanism (4), a first evaporator (5) and a gas A liquid separator (6), the inlet of the vortex tube (2) communicates with the exhaust port of the compressor (1), and the outlet of the hot end of the vortex tube (2) passes through the first condenser (3 ) is communicated with the refrigerant inlet of the gas-liquid separator (6), the cold end outlet of the vortex tube (2) is communicated with the main injection port of the first injection mechanism (4), and the first The outlet of the injection mechanism (4) communicates with the refrigerant inlet of the gas-liquid separator (6), and the injected port of the first injection mechanism (4) communicates with the first evaporator (5) , the first evaporator (5) communicates with the liquid refrigerant outlet of the gas-liquid separator (6) through the first throttling mechanism (14), and the gas-liquid refrigerant outlet of the gas-liquid separator (6) It communicates with the suction port of the compressor (1). 2. The heat exchange system according to claim 1, characterized in that: the heat exchange system further comprises a second injection mechanism (7) and a second evaporator (8), and the second injection mechanism (7 ) is in communication with the condenser, the ejected port of the second injection mechanism (7) is in communication with the second evaporator (8), and the second injection mechanism (7) The outlet of the second evaporator (8) communicates with the refrigerant inlet of the gas-liquid separator (6), and the second evaporator (8) communicates with the liquid refrigerant outlet of the gas-liquid separator (6). 3. The heat exchange system according to claim 2, characterized in that: the heat exchange system further comprises an economizer (9) and a second throttling mechanism (10), and the economizer (9) has mutual heat exchange The main pipeline and auxiliary pipeline, one end of the main pipeline is connected to the first condenser (3), the other end of the main pipeline is connected to the main ejector of the second injection mechanism (7) One end of the auxiliary pipeline is connected to the first condenser (3) through the second throttling mechanism (10), and the other end of the auxiliary pipeline is connected to the gas supply port of the compressor (1) place. 4. The heat exchange system according to claim 1, characterized in that: the heat exchange system further comprises a third evaporator (11), a third condenser (12) and a driving mechanism (13), the third The evaporator (11), the third condenser (12) and the driving mechanism (13) are sequentially connected to form a heat exchange cycle, and the third condenser (12) is connected to the gas-liquid separator (6) The liquid refrigerant inside is used for heat exchange. 5. The heat exchange system according to claim 4, characterized in that: a heat exchange coil is arranged in the gas-liquid separator (6), and the heat exchange coil constitutes the third condenser (12) . 6. The heat exchange system according to claim 4, wherein the refrigerant in the heat exchange cycle comprises water or glycol solution. 7. The heat exchange system according to claim 2, characterized in that: the heat exchange system further comprises a refrigeration mechanism, and the first evaporator (5) is located in the refrigeration mechanism. 8. The heat exchange system according to claim 2, characterized in that: the heat exchange system further comprises a refrigerating mechanism, and the second evaporator (8) is located in the refrigerating mechanism. 9. The heat exchange system according to claim 1, characterized in that: the heat exchange system further comprises a water heating mechanism, and the water heating mechanism communicates with the first condenser (3). 10. The heat exchange system according to claim 1, wherein the refrigerant in the heat exchange system comprises water vapor.

Images