阅读说明：本技术 一种混合制冷剂和空调系统 (Mixed refrigerant and air conditioning system ) 是由 黄宇杰 钟权 赵桓 吴敏庭 王晓 于 2021-09-16 设计创作，主要内容包括：本公开提供一种混合制冷剂和空调系统,所述混合制冷剂包括第一组分、第二组分和第三组分,其中：第一组分为丙烷或氨,所述第二组分为异丁烷,所述第三组分为反式1,1,1,4,4,4-六氟-2-丁烯。本公开的混合制冷剂具有低GWP及良好的热力性能,热力性能与使用R134a制冷剂的机组相当甚至更优,容积制冷量和效率COP值优于传统的R134a除湿系统,可成为替代R134a的环保制冷剂,有效解决了其他替代R410A制冷剂的GWP偏高的问题,同时还解决了其他制冷剂的热力性能差的问题。(The present disclosure provides a mixed refrigerant and an air conditioning system, the mixed refrigerant comprising a first component, a second component, and a third component, wherein: the first component is propane or ammonia, the second component is isobutane, and the third component is trans-1, 1,1,4,4, 4-hexafluoro-2-butene. The mixed refrigerant disclosed by the invention has low GWP and good thermal performance, the thermal performance is equivalent to or even better than that of a unit using R134a refrigerant, the volumetric refrigerating capacity and the efficiency COP value are superior to those of a traditional R134a dehumidification system, the mixed refrigerant can be an environment-friendly refrigerant for replacing R134a, the problem of higher GWP of other R410A replacing refrigerants is effectively solved, and the problem of poor thermal performance of other refrigerants is also solved.)

1. A mixed refrigerant characterized by:

comprising a first component, a second component and a third component, wherein: the first component is propane or ammonia, the second component is isobutane, and the third component is trans-1, 1,1,4,4, 4-hexafluoro-2-butene.

2. The mixed refrigerant according to claim 1, characterized in that:

the mass ratio of the first component to the mixed refrigerant is 40-60%, the mass ratio of the second component to the mixed refrigerant is 15-30%, and the mass ratio of the third component to the mixed refrigerant is 10-30%.

3. The mixed refrigerant according to claim 2, characterized in that:

the first component accounts for 50% of the mixed refrigerant by mass, the second component accounts for 30% of the mixed refrigerant by mass, and the third component accounts for 20% of the mixed refrigerant by mass.

4. The mixed refrigerant according to claim 2, characterized in that:

the mass ratio of the propane to the isobutane to the trans-1, 1,1,4,4, 4-hexafluoro-2-butene is 40:30: 30; alternatively, the first and second electrodes may be,

the mass ratio of propane, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene is 60:30: 10.

5. The mixed refrigerant according to claim 2, characterized in that:

the mass ratio of the propane to the isobutane to the trans-1, 1,1,4,4, 4-hexafluoro-2-butene is 60:15: 25; alternatively, the first and second electrodes may be,

the mass ratio of propane, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene is 50:30: 20.

6. The mixed refrigerant according to claim 2, characterized in that:

the mass ratio of ammonia, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene is 40:30: 30; alternatively, the first and second electrodes may be,

the mass ratio of ammonia, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene is 60:30: 10.

7. The mixed refrigerant according to claim 2, characterized in that:

the mass ratio of ammonia, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene is 60:15: 25; alternatively, the first and second electrodes may be,

the mass ratio of ammonia, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene is 50:30: 20.

8. An air conditioning system characterized by:

comprising the mixed refrigerant according to any one of claims 1 to 7.

9. The air conditioning system of claim 8, wherein:

the evaporator also comprises a compressor (1), a condenser (3), a throttling device (2), a first evaporator (4), a second evaporator (5) and a third evaporator (6), wherein along the flowing direction of refrigerant, the refrigerant sequentially passes through the compressor (1), the condenser (3), the throttling device (2), the first evaporator (4), the second evaporator (5) and the third evaporator (6), returning to the compressor (1), the air conditioning system further comprising an air duct (100), the condenser (3), the first evaporator (4), the second evaporator (5) and the third evaporator (6) are all arranged in the air duct (100), and along the flowing direction of the air flow, the third evaporator (6), the second evaporator (5), the first evaporator (4) and the condenser (3) are arranged in sequence.

Technical Field

The disclosure belongs to the technical field of refrigeration, and particularly relates to a mixed refrigerant and an air conditioning system.

Background

With the trend of environmental protection becoming more serious, and with respect to the "greenhouse effect" of HFCs, the montreal protocol amendment requires a refrigerant which does not damage the ozone layer and has a low GWP value to replace the current high GWP refrigerant, and is effectively applied to a refrigeration system. In the existing dehumidification system, most of the refrigerants used in the system are R134a (GWP: 1430), but at present, no perfect solution for replacing R134a has been found, and due to the characteristics of R134a, the refrigeration system using R134a has a low capacity per unit volume, so that the compressor has a large volume (large displacement), and finally the system COP is low. Because the mixed working medium has the characteristic of balancing the physical properties of the refrigerant, the research on the mixed working medium becomes a hotspot of the research of scholars and enterprises at home and abroad.

Because technical problems of low GWP value, high thermal performance (including COP, volume refrigerating capacity and the like) and the like cannot be simultaneously guaranteed by the refrigerant in the prior art, a mixed refrigerant and an air conditioning system are researched and designed by the disclosure.

Disclosure of Invention

Therefore, the technical problem to be solved by the present disclosure is to overcome the defect of the prior art that the refrigerant cannot simultaneously ensure low GWP value and high thermal performance, thereby providing a mixed refrigerant and an air conditioning system.

The present disclosure provides a mixed refrigerant comprising a first component, a second component, and a third component, wherein: the first component is propane or ammonia, the second component is isobutane, and the third component is trans-1, 1,1,4,4, 4-hexafluoro-2-butene.

In some embodiments, the first component occupies 40 to 60% by mass of the mixed refrigerant, the second component occupies 15 to 30% by mass of the mixed refrigerant, and the third component occupies 10 to 30% by mass of the mixed refrigerant, in mass percentage.

In some embodiments, the first component occupies 50% by mass of the mixed refrigerant, the second component occupies 30% by mass of the mixed refrigerant, and the third component occupies 20% by mass of the mixed refrigerant, in mass%.

In some embodiments, the propane, isobutane and trans 1,1,1,4,4, 4-hexafluoro-2-butene are in a mass ratio of 40:30: 30; alternatively, the first and second electrodes may be,

the mass ratio of propane, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene is 60:30: 10.

In some embodiments, the propane, isobutane and trans 1,1,1,4,4, 4-hexafluoro-2-butene are in a mass ratio of 60:15: 25; alternatively, the first and second electrodes may be,

the mass ratio of propane, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene is 50:30: 20.

In some embodiments, the mass ratio of ammonia, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene is 40:30: 30; alternatively, the first and second electrodes may be,

the mass ratio of ammonia, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene is 60:30: 10.

In some embodiments, the mass ratio of ammonia, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene is 60:15: 25; alternatively, the first and second electrodes may be,

the mass ratio of ammonia, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene is 50:30: 20.

The present disclosure also provides an air conditioning system comprising the mixed refrigerant of any of the preceding.

In some embodiments, the air conditioning system further comprises a compressor, a condenser, a throttling device, a first evaporator, a second evaporator and a third evaporator, wherein along the flowing direction of the refrigerant, the refrigerant sequentially passes through the compressor, the condenser, the throttling device, the first evaporator, the second evaporator and the third evaporator and returns to the compressor, the air conditioning system further comprises an air duct, the condenser, the first evaporator, the second evaporator and the third evaporator are all arranged in the air duct, and along the flowing direction of the air flow, the third evaporator, the second evaporator, the first evaporator and the condenser are sequentially arranged.

The mixed refrigerant and air conditioning system provided by the disclosure has the following beneficial effects:

the invention provides a ternary environment-friendly mixed refrigerant and an air-conditioning system using the same, namely propane (R290) or three components of ammonia, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene are physically mixed into a ternary mixture (namely the mixed refrigerant consists of three different refrigerants) according to corresponding mass ratio, the mixed refrigerant has low GWP and good thermal performance, the GWP value is low and far lower than R134a, the ternary environment-friendly mixed refrigerant has obvious environment-friendly advantages and small temperature slippage, and gas-liquid phase components are basically consistent in the using process; the thermodynamic performance of the refrigerant is equivalent to or even better than that of a unit using R134a refrigerant, the volume refrigerating capacity and the efficiency COP value are superior to those of the traditional R134a dehumidification system, the refrigerant can be an environment-friendly refrigerant replacing R134a, the problem of high GWP of other refrigerants replacing R410A is effectively solved, and the problem of poor thermodynamic performance of other refrigerants is also solved. And the sliding temperature of the mixed working medium is low, the adverse effect caused by temperature sliding is eliminated, and the potential safety hazard caused by combustible refrigerants can be reduced or even eliminated by the air conditioning system.

Drawings

Fig. 1 is a system schematic diagram of an air conditioning system containing a mixed refrigerant according to the present invention.

The reference numerals are represented as:

1. a compressor; 2. a throttling device; 3. a condenser; 4. a first evaporator; 5. a second evaporator; 6. a third evaporator.

Detailed Description

The present disclosure provides a mixed refrigerant, wherein:

comprising a first component, a second component and a third component, wherein: the first component is propane (R290) or ammonia, the second component is isobutane, and the third component is trans-1, 1,1,4,4, 4-hexafluoro-2-butene.

The invention provides a ternary environment-friendly mixed refrigerant and an air-conditioning system using the same, namely propane (R290) or three components of ammonia, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene are physically mixed into a ternary mixture (namely the mixed refrigerant consists of three different refrigerants) according to corresponding mass ratio, the mixed refrigerant has low GWP and good thermal performance, the GWP value is low and far lower than R134a, the ternary environment-friendly mixed refrigerant has obvious environment-friendly advantages and small temperature slippage, and gas-liquid phase components are basically consistent in the using process; the thermodynamic performance of the refrigerant is equivalent to or even better than that of a unit using R134a refrigerant, the volume refrigerating capacity and the efficiency COP value are superior to those of the traditional R134a dehumidification system, the refrigerant can be an environment-friendly refrigerant replacing R134a, the problem of high GWP of other refrigerants replacing R410A is effectively solved, and the problem of poor thermodynamic performance of other refrigerants is also solved. And the sliding temperature of the mixed working medium is low, the adverse effect caused by temperature sliding is eliminated, and the potential safety hazard caused by combustible refrigerants can be reduced or even eliminated by the air conditioning system.

Preferably, the first component accounts for 40-60% of the mixed refrigerant by mass, the second component accounts for 15-30% of the mixed refrigerant by mass, and the third component accounts for 10-30% of the mixed refrigerant by mass. Under the condition that the three components meet the mass ratio, the environment-friendly mixed refrigerant has good thermal performance (COP and volume refrigerating capacity), low GWP and optimal comprehensive performance in two aspects.

The present disclosure provides an environment-friendly mixed refrigerant to replace R134a, the mixed refrigerant has a low GWP, consists of propane (R290) or ammonia, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene, has a GWP much lower than that of R134a, and has a capacity refrigerant up to 20%.

The primary purpose of the present disclosure is to provide a mixed refrigerant for a stepped temperature reduction dehumidification system, and a refrigeration dehumidification system using the mixed refrigerant has good environmental performance, has low GWP, and is superior to COP of a conventional refrigeration dehumidification system of R134 a. A mixed refrigerant for a stepped temperature reduction dehumidification system is provided. The GWP value of the refrigerant in the system of the system using the mixed refrigerant is low, and the system meets the requirements of environmental protection regulations in various regions around the world. Not only the thermal performance is better than that of R134a under a proper proportion, but also the dehumidification efficiency of the system is higher than that of the traditional refrigeration dehumidification system.

Further preferably, the first component occupies 50% by mass of the mixed refrigerant, the second component occupies 30% by mass of the mixed refrigerant, and the third component occupies 20% by mass of the mixed refrigerant.

The ternary mixed refrigerant GWP is less than 150, and the capacity and the energy efficiency of the refrigerant unit are equivalent to or even better than those of a unit using R134a refrigerant.

The preparation method of the mixed working medium for the system provided by the invention is that three components of propane, ammonia, isobutane and 1,1,1,4,4, 4-hexafluoro-2-butene are physically mixed into a ternary mixture at normal temperature and in a liquid phase state according to corresponding mass ratio. The basic parameters of each component are shown in Table 1. Preferred compositions of this type are described in the examples (all percentages are by mass).

TABLE 1

Example 1

Propane (R290), isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene are physically and uniformly mixed at a normal temperature in a liquid phase according to a mass ratio of 40:30:30 to obtain the environment-friendly mixed working medium.

Example 2

Propane (R290), isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene are physically and uniformly mixed at a normal temperature and in a liquid phase according to a mass ratio of 60:30:10 to obtain the environment-friendly mixed working medium.

Example 3

Propane (R290), isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene are physically and uniformly mixed at a normal temperature and in a liquid phase according to a mass ratio of 60:15:25 to obtain the environment-friendly mixed working medium.

Example 4

Propane (R290), isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene are physically and uniformly mixed at a normal temperature in a liquid phase according to a mass ratio of 50:30:20 to obtain the environment-friendly mixed working medium.

Example 5

The environment-friendly mixed working medium is obtained by physically and uniformly mixing three components of ammonia, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene at a normal-temperature liquid phase according to a mass ratio of 40:30: 30.

Example 6

The environment-friendly mixed working medium is obtained by physically and uniformly mixing three components of ammonia, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene at a normal-temperature liquid phase according to a mass ratio of 60:30: 10.

Example 7

The environment-friendly mixed working medium is obtained by physically and uniformly mixing three components of ammonia, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene at a normal-temperature liquid phase according to a mass ratio of 60:15: 25.

Example 8

The environment-friendly mixed working medium is obtained by physically and uniformly mixing three components of ammonia, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene at a normal-temperature liquid phase according to a mass ratio of 50:30: 20.

In the comparative example 1, three components of propane (R290), isobutane, trans-1, 1,1,4,4, 4-hexafluoro-2-butene are physically and uniformly mixed at a normal temperature and in a liquid phase according to a mass ratio of 30:30:40 to obtain the environment-friendly mixed working medium.

In a comparative example 2, three components of propane (R290), isobutane, trans-1, 1,1,4,4, 4-hexafluoro-2-butene are physically and uniformly mixed at a normal temperature and in a liquid phase according to a mass ratio of 70:10:20 to obtain the environment-friendly mixed working medium.

In a comparative example 3, three components of propane (R290), isobutane, trans-1, 1,1,4,4, 4-hexafluoro-2-butene are physically and uniformly mixed at a normal temperature and in a liquid phase according to a mass ratio of 65:30:5 to obtain the environment-friendly mixed working medium.

In a comparative example 4, three components of ammonia, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene are physically and uniformly mixed at a normal temperature and in a liquid phase according to a mass ratio of 30:30:40 to obtain the environment-friendly mixed working medium.

In a comparative example 5, three components of ammonia, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene are physically and uniformly mixed at a normal temperature and in a liquid phase according to a mass ratio of 70:10:20 to obtain the environment-friendly mixed working medium.

In a comparative example 6, three components of ammonia, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene are physically and uniformly mixed at a normal temperature and in a liquid phase according to a mass ratio of 65:30:5 to obtain the environment-friendly mixed working medium.

Namely, the dry bulb temperature of the inlet air is 27 ℃, the wet bulb temperature is 21.2 ℃, the comparison results of the refrigeration cycle performance of the refrigeration system loop and the relative thermal performance (namely the relative refrigerating capacity per unit volume and the relative efficiency COP) of R134a obtained by the calculation of the above embodiment are shown in tables 2 to 3 according to the simulation calculation of the isentropic efficiency of 0.7, the superheat degree of 5 ℃, the supercooling degree of 5 ℃, the evaporation temperature of 5 ℃ and the condensation temperature of 35 ℃.

As can be seen from Table 2, the environmental performance of the stepped temperature reduction dehumidification system using the mixed working medium provided by the invention is better than R134a, and the coefficient of thermal cycle performance is better than R134 a.

TABLE 2 basic parameters of the mixed working substances

TABLE 3 basic parameters of the working mixture

In the comparative example 1, because the dehumidification system has a certain proportion requirement on the proportion of the mixed refrigerant, the calculation shows that the first component is proper at 40-60%, and the proportion is too small, so that the cold quantity of the evaporator 4 cannot meet the requirement; the refrigerating capacity per unit volume is also smaller.

In comparative example 2, since the dehumidification system has a certain proportion requirement on the proportion of the mixed refrigerant, the calculation shows that the first component is proper at 40-60%, and the refrigeration capacity of the evaporators 5 and 6 can not meet the requirement if the proportion is too large.

In comparative example 3, the third component is preferably 10-30%, and if the third component is too small, the cold capacity of the evaporator 6 cannot meet the requirement.

In comparative example 4, since the dehumidification system has a certain proportion requirement on the proportion of the mixed refrigerant, the calculation shows that the first component is more suitable at 5-10%, and the proportion is too small, so that the cold quantity of the evaporator 4 cannot meet the requirement. (ii) a

In comparative example 5, the third component is preferably 40-65%, and if the third component is too small, the cold capacity of the evaporator 6 cannot meet the requirement. (ii) a

In comparative example 6, similarly, the second component is preferably 25% to 55%, and if the ratio is too small, the cold capacity of the evaporator 5 cannot meet the requirement. (ii) a

While the COP coefficient of performance of the comparative example is substantially lower than the examples. Mainly considering energy efficiency (relative COP) as a main factor and comprehensively considering other parameters.

As can be seen from Table 3, when the mixed working medium provided by the invention is used in a stepped temperature reduction dehumidification system, the volume refrigerating capacity and the efficiency COP value of the mixed working medium are superior to those of the traditional R134a dehumidification system, and the mixed working medium can be an environment-friendly refrigerant replacing R134 a. From the above, the ternary mixed working medium provided by the disclosure not only has the environmental protection characteristic of low GWP, but also has small temperature slippage, system performance coefficient similar to that of R134a, and highest refrigerating capacity of unit volume capable of being improved by 20%, and can better replace R134a refrigerant.

The present disclosure also provides an air conditioning system comprising the mixed refrigerant of any of the preceding.

The invention provides a ternary environment-friendly mixed refrigerant and an air-conditioning system using the same, namely propane (R290) or three components of ammonia, isobutane and trans-1, 1,1,4,4, 4-hexafluoro-2-butene are physically mixed into a ternary mixture (namely the mixed refrigerant consists of three different refrigerants) according to corresponding mass ratio, the mixed refrigerant has low GWP and good thermal performance, the GWP value is low and far lower than R134a, the ternary environment-friendly mixed refrigerant has obvious environment-friendly advantages and small temperature slippage, and gas-liquid phase components are basically consistent in the using process; the thermodynamic performance of the refrigerant is equivalent to or even better than that of a unit using R134a refrigerant, the volume refrigerating capacity and the efficiency COP value are superior to those of the traditional R134a dehumidification system, the refrigerant can be an environment-friendly refrigerant replacing R134a, the problem of high GWP of other refrigerants replacing R410A is effectively solved, and the problem of poor thermodynamic performance of other refrigerants is also solved. And the sliding temperature of the mixed working medium is low, the adverse effect caused by temperature sliding is eliminated, and the potential safety hazard caused by combustible refrigerants can be reduced or even eliminated by the air conditioning system.

Still include compressor 1, condenser 3, throttling arrangement 2, first evaporimeter 4, second evaporimeter 5 and third evaporimeter 6, along the direction that the refrigerant flows, the refrigerant passes through in proper order compressor 1 condenser 3 throttling arrangement 2 first evaporimeter 4 second evaporimeter 5 with third evaporimeter 6 returns to compressor 1, air conditioning system still includes wind channel 100, condenser 3 first evaporimeter 4 second evaporimeter 5 with third evaporimeter 6 all set up in the wind channel 100, and along the flow direction of air current, third evaporimeter 6 second evaporimeter 5 first evaporimeter 4 with condenser 3 arranges in proper order.

The present disclosure includes or consists essentially of a blend of propane, ammonia, isobutane, 1,1,1,4,4, 4-hexafluoro-2-butene for use in a step-down dehumidification system. To the dehumidification system who uses non-azeotropic mixture refrigerant, can realize the ladder cooling dehumidification, and then reduce the heat transfer loss of traditional dehumidification process by a wide margin, reduced the dehumidification energy consumption, promoted the advantage of dehumidification efficiency.

Referring to fig. 1, a high-temperature and high-pressure mixed gaseous refrigerant from an exhaust port of a compressor 1 enters a condenser 3 for condensation, the mixed refrigerant in the system is condensed into liquid, and the liquid is throttled by a throttling device 2 and then enters a first evaporator 4, a second evaporator 5 and a third evaporator 6 for evaporation, and finally returns to the compressor. Because the mixed refrigerant is a non-azeotropic refrigerant and has large temperature slippage, the inlet evaporation temperature of the evaporator is lower than the outlet temperature of the evaporator under the same evaporation pressure. The air firstly cools through the higher third evaporimeter 6 of surface temperature, reduces to the dehumidification under the saturation temperature through the lower second evaporimeter 5 of surface temperature again, and further dehumidification again through the lower first evaporimeter 4 of temperature, can also improve air temperature in reacing condenser 3 again, improves indoor comfort level. Compared with the conventional dehumidification system, the dehumidification efficiency can be improved.

The above description is only exemplary of the present disclosure and should not be taken as limiting the disclosure, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure. The foregoing is only a preferred embodiment of the present disclosure, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present disclosure, and these modifications and variations should also be regarded as the protection scope of the present disclosure.