CN103954067B - Refrigeration plant - Google Patents

Refrigeration plant Download PDF

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Publication number
CN103954067B
CN103954067B CN201410152529.5A CN201410152529A CN103954067B CN 103954067 B CN103954067 B CN 103954067B CN 201410152529 A CN201410152529 A CN 201410152529A CN 103954067 B CN103954067 B CN 103954067B
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air
compressed
making
auxiliary
chamber
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CN103954067A (en
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梁祥飞
黄辉
郑波
黄柏良
方金升
庄嵘
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Abstract

The open a kind of refrigeration plant of the present invention, comprise the outdoor heat exchanger, compressor unit, indoor heat exchanger and the making-up air device that are connected successively, making-up air device comprises the first making-up air device and the 2nd making-up air device, on pipeline between indoor heat exchanger and outdoor heat exchanger, it is provided with the first making-up air device being connected successively and the 2nd making-up air device; Wherein, between indoor heat exchanger and the first making-up air device, it is provided with first throttle device, between the first making-up air device and the 2nd making-up air device, it is provided with the 2nd throttling set; Compressor unit comprises main road compressed element and auxiliary compressed element, and the gas flow equalization being separated with the 2nd making-up air device through the first making-up air device is to main road compressed element; On the first making-up air device and/or the tonifying Qi pipeline between the 2nd making-up air device and main road compressed element, it is provided with auxiliary compressed element. Multi-level throttle of the present invention and multistage tonifying Qi reduce indoor heat exchanger entrance specific enthalpy, it is to increase the air compensation of compressor unit so that ability and efficiency get a promotion.

Description

Refrigeration plant
Technical field
The present invention relates to refrigeration is field, especially, it relates to a kind of refrigeration plant.
Background technology
Air source heat pump heating capacity is decayed rapidly and cannot meet consumers' demand with outdoor environment temperature decline. The two level of existing employing or standard two grades are compressed second vapor injection and are increased enthalpy technology, comprise incomplete in the middle of two-stage throttling cooling and incomplete refrigeration cycle in the middle of one-level throttling, it is possible to raising low-temperature heating capacity and COP, have certain help to reduction compressor exhaust temperature simultaneously. But prior art is limited to the lifting amplitude of the lifting of ability or efficiency, the reduction amplitude of high pressure stage exhaust temperature is also limited.
Summary of the invention
The object of the invention is to provide a kind of refrigeration plant, increases the low technical problem of enthalpy technical efficiency to solve the two level of existing employing or accurate two grades of compression second vapor injection.
For achieving the above object, the present invention provides a kind of refrigeration plant, comprise the outdoor heat exchanger, compressor unit, indoor heat exchanger and the making-up air device that are connected successively, making-up air device comprises the first making-up air device and the 2nd making-up air device, on pipeline between indoor heat exchanger and outdoor heat exchanger, it is provided with the first making-up air device being connected successively and the 2nd making-up air device; Wherein, between indoor heat exchanger and the first making-up air device, it is provided with first throttle device, between the first making-up air device and the 2nd making-up air device, it is provided with the 2nd throttling set; Compressor unit comprises main road compressed element and auxiliary compressed element, and the gas flow equalization being separated with the 2nd making-up air device through the first making-up air device is to main road compressed element; On the first making-up air device and/or the tonifying Qi pipeline between the 2nd making-up air device and main road compressed element, it is provided with auxiliary compressed element.
Further, main road compressed element comprises low pressure compression chamber and high pressure compressed chamber, low pressure compression chamber and high pressure compressed chamber are connected in series, second vapor injection mouth it is provided with between low pressure compression chamber and high pressure compressed chamber, the air outlet of the 2nd making-up air device is connected with second vapor injection mouth, the air outlet of the first making-up air device is connected with the venting port in high pressure compressed chamber, is provided with auxiliary compressed element between the air outlet of the first making-up air device and the venting port in high pressure compressed chamber.
Further, main road compressed element comprises low pressure compression chamber and high pressure compressed chamber, low pressure compression chamber and high pressure compressed chamber are connected in series, second vapor injection mouth it is provided with between low pressure compression chamber and high pressure compressed chamber, the air outlet of the first making-up air device is connected with on second vapor injection mouth, the air outlet of the 2nd making-up air device is connected with the venting port in high pressure compressed chamber, is provided with auxiliary compressed element between the air outlet and the venting port in high pressure compressed chamber of the 2nd making-up air device.
Further, main road compressed element comprises low pressure compression chamber and high pressure compressed chamber, low pressure compression chamber and high pressure compressed chamber are connected in series, second vapor injection mouth it is provided with between low pressure compression chamber and high pressure compressed chamber, the air outlet of the first making-up air device is connected with second vapor injection mouth, the air outlet of the 2nd making-up air device is connected on the inlet mouth of auxiliary compressed element, and the venting port of auxiliary compressed element is connected on the tonifying Qi pipeline between the air outlet of the first making-up air device and second vapor injection mouth.
Further, compressor unit also comprises increase-volume compression chamber, and increase-volume compression chamber is in parallel with low pressure compression chamber.
Further, auxiliary compressed element comprises the first auxiliary compressed element and the 2nd auxiliary compressed element, the air outlet of the 2nd making-up air device connects on the inlet mouth of the 2nd auxiliary compressed element, the air outlet of the first making-up air device is connected on the inlet mouth of the first auxiliary compressed element, and the venting port of the first auxiliary compressed element and the venting port of the 2nd auxiliary compressed element are all connected on the venting port of main road compressed element.
Further, auxiliary compressed element comprises the first auxiliary compressed element and the 2nd auxiliary compressed element, the air outlet of the 2nd making-up air device connects on the inlet mouth of the 2nd auxiliary compressed element, the air outlet of the first making-up air device is connected on the inlet mouth of the first auxiliary compressed element, the venting port of the 2nd auxiliary compressed element is connected on the inlet mouth of the first auxiliary compressed element, and the venting port of the first auxiliary compressed element is connected on the venting port of main road compressed element.
Further, main road compressed element comprises low pressure compression chamber and high pressure compressed chamber, and low pressure compression chamber and high pressure compressed chamber are connected in series; Or, main road compressed element comprises 2 compression chambers, and 2 compression chambers are connected in parallel.
Further, pipeline between indoor heat exchanger and outdoor heat exchanger is also provided with the 3rd making-up air device, 3rd making-up air device is connected between outdoor heat exchanger and the 2nd making-up air device, the 3rd throttling set also it is provided with, through the gas flow main road compressed element of the 3rd making-up air device separation between the 2nd making-up air device and the 3rd making-up air device; On tonifying Qi pipeline between the first making-up air device and main road compressed element, it is provided with an auxiliary compressed element; On the 2nd making-up air device and/or the tonifying Qi pipeline between the 3rd making-up air device and main road compressed element, it is provided with an auxiliary compressed element.
Further, main road compressed element comprises low pressure compression chamber and high pressure compressed chamber, low pressure compression chamber and high pressure compressed chamber are connected in series, and are provided with second vapor injection mouth between low pressure compression chamber and high pressure compressed chamber, and the air outlet of the 2nd making-up air device is connected with at second vapor injection mouth; Auxiliary compressed element comprises the first auxiliary compressed element and the 2nd auxiliary compressed element; The air outlet of the first making-up air device is connected on the inlet mouth of the first auxiliary compressed element, and the venting port of the first auxiliary compressed element is connected on the venting port in high pressure compressed chamber; The air outlet of the 3rd making-up air device is connected on the inlet mouth of the 2nd auxiliary compressed element, and the venting port of the 2nd auxiliary compression chamber is connected on the tonifying Qi pipeline between the air outlet of the 2nd making-up air device and second vapor injection mouth.
Further, auxiliary compressed element comprises the first auxiliary compressed element, the 2nd auxiliary compressed element and the 3rd auxiliary compressed element; The air outlet of the first making-up air device is connected on the inlet mouth of the first auxiliary compressed element, the air outlet of the 2nd making-up air device is connected on the inlet mouth of the 2nd auxiliary compressed element, and the air outlet of the 3rd making-up air device is connected on the inlet mouth of the 3rd auxiliary compressed element; The venting port of the first auxiliary compressed element, the 2nd auxiliary compressed element and the 3rd auxiliary compressed element is all connected on the venting port of main road compressed element.
Further, the free air delivery of low pressure compression chamber is Va, and the free air delivery in high pressure compressed chamber is Vb; Refrigeration plant system adopts refrigeration agent to be R410A, R290, R32, the mixture containing R32 and R1234ze or the mixture containing R32 and R1234yf; Wherein, the ratio range of Vb and Va is 0.5 to 1.0.
Further, the ratio range of Vb and Va is 0.75 to 0.9.
Further, the free air delivery of low pressure compression chamber is Va, and the free air delivery of auxiliary compressed element is Vc; Refrigeration plant system adopts refrigeration agent to be R410A, R290, R32, the mixture containing R32 and R1234ze or the mixture containing R32 and R1234yf; Wherein, when refrigeration plant is used for heat pump type air conditioner, the ratio range of Vc and Va is 0.05 to 0.25; Or when refrigeration plant is used for air source hot pump water heater, the ratio range of Vc and Va is 0.05 to 0.45.
Further, when refrigeration plant is used for heat pump type air conditioner, the ratio range of Vc and Va is 0.07 to 0.15; Or, when refrigeration plant is used for air source hot pump water heater, the ratio range of Vc and Va is 0.1 to 0.3.
Further, the free air delivery of low pressure compression chamber is Va, and the free air delivery of auxiliary compressed element is Vc; Refrigeration plant system adopts refrigeration agent to be R410A, R290, R32, the mixture containing R32 and R1234ze or the mixture containing R32 and R1234yf; Wherein, when refrigeration plant is used for heat pump type air conditioner, the ratio range of Vc and Va is 0.07 to 0.45; Or, when refrigeration plant is used for air source hot pump water heater, the ratio range of Vc and Va is 0.08 to 0.65.
Further, when refrigeration plant is used for heat pump type air conditioner, the ratio range of Vc and Va is 0.08 to 0.3; Or, when refrigeration plant is used for air source hot pump water heater, the ratio range of Vc and Va is 0.12 to 0.5.
Further, the free air delivery of main road compressed element is Va, and the free air delivery of the first auxiliary compressed element is Vc, and the 2nd auxiliary compressed element is Vb; Refrigeration plant system adopts refrigeration agent to be R410A, R290, R32, the mixture containing R32 and R1234ze or the mixture containing R32 and R1234yf; Wherein, when refrigeration plant is used for heat pump type air conditioner, the ratio range of Vb and Va is the ratio range of 0.07 to 0.45, Vc and Va is 0.05 to 0.25; Or, when refrigeration plant is used for air source hot pump water heater, the ratio range of Vb and Va is the ratio range of 0.08 to 0.65, Vc and Va is 0.05 to 0.45.
Further, when refrigeration plant is used for heat pump type air conditioner, the ratio range of Vb and Va is the ratio range of 0.08 to 0.3, Vc and Va is 0.07 to 0.15; Or, when refrigeration plant is used for air source hot pump water heater, the ratio range of Vb and Va is the ratio range of 0.12 to 0.5, Vc and Va is 0.1 to 0.3.
Further, making-up air device is flash evaporation or intermediate heat.
Further, the 2nd the 3rd throttling set between making-up air device and outdoor heat exchanger, also it is provided with.
Further, the 3rd the 4th throttling set between making-up air device and outdoor heat exchanger, also it is provided with.
The present invention has following useful effect:
Reduce further indoor heat exchanger entrance specific enthalpy by multi-level throttle and multistage tonifying Qi, improve the air compensation of compressor unit simultaneously so that ability and efficiency are improved, reduce the exhaust temperature of compressor unit.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage. Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing of the part forming the application is used to provide a further understanding of the present invention, and the schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention. In the accompanying drawings:
Fig. 1 is the schematic diagram of the first circulation embodiment of the refrigeration plant according to the present invention;
Fig. 2 is the schematic diagram of the 2nd circulation embodiment of the refrigeration plant according to the present invention;
Fig. 3 is the first change embodiment schematic diagram of the first circulation embodiment of the refrigeration plant according to the present invention;
Fig. 4 is the first change embodiment schematic diagram of the 2nd circulation embodiment of the refrigeration plant according to the present invention;
Fig. 5 is the 2nd change embodiment schematic diagram of the 2nd circulation embodiment of the refrigeration plant according to the present invention;
Fig. 6 is the 3rd change embodiment schematic diagram of the 2nd circulation embodiment of the refrigeration plant according to the present invention;
Fig. 7 is the schematic diagram of the 3rd circulation embodiment of the refrigeration plant according to the present invention;
Fig. 8 is the 2nd change embodiment schematic diagram of the first circulation embodiment of the refrigeration plant according to the present invention;
Fig. 9 is the 4th change embodiment schematic diagram of the 2nd circulation embodiment of the refrigeration plant according to the present invention;
Figure 10 is the first change embodiment schematic diagram of the 3rd circulation embodiment of the refrigeration plant according to the present invention;
Figure 11 is the first compressor unit schematic diagram of the 2nd circulation embodiment of the middle refrigeration plant according to the present invention; And
Figure 12 be the 3rd circulation embodiment of the refrigeration plant according to the present invention the first compressor unit schematic diagram.
Reference numeral in accompanying drawing is as follows: 1, compressed element; 101, the first compressor unit; 102, the 2nd compressor unit; 2, outdoor heat exchanger; 3, indoor heat exchanger; 401, first throttle device; 402, the 2nd throttling set; 403, the 3rd throttling set; 404, the 4th throttling set; 501, the first making-up air device; 502, the 2nd making-up air device; 503, the 3rd making-up air device; 601, the first gas-liquid separator; 602, the 2nd gas-liquid separator; 7, outdoor unit; 8, indoor unit.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
As shown in Fig. 1 to Fig. 6, Fig. 8 and Fig. 9, the refrigeration plant of the present invention comprises outdoor heat exchanger 2, compressor unit and the indoor heat exchanger 3 and making-up air device that are connected successively, described making-up air device comprises the first making-up air device 501 and the 2nd making-up air device 502, on pipeline between described indoor heat exchanger 3 and described outdoor heat exchanger 2, it is provided with described first making-up air device 501 and described 2nd making-up air device 502 that are connected successively; Between described indoor heat exchanger 3 and described first making-up air device 501, it is provided with first throttle device 401, between described first making-up air device 501 and described 2nd making-up air device 502, it is provided with the 2nd throttling set 402; Described compressor unit comprises main road compressed element and auxiliary compressed element, and the gas flow equalization being separated with described 2nd making-up air device 502 through described first making-up air device 501 is to described main road compressed element; On described first making-up air device 501 and/or the tonifying Qi pipeline between described 2nd making-up air device 502 and described main road compressed element, it is provided with described auxiliary compressed element. Indoor unit 8 comprises indoor heat exchanger 3 associated components such as grade, and outdoor unit 7 comprises the associated components such as compressor 1, outdoor heat exchanger 2 and gas-liquid separator 6.
As shown in Figure 11 (a) shows, described main road compressed element comprises low pressure compression chamber and high pressure compressed chamber, described low pressure compression chamber and described high pressure compressed chamber are connected in series, it is provided with second vapor injection mouth between described low pressure compression chamber and described high pressure compressed chamber, the air outlet of the 2nd making-up air device 502 is connected with described second vapor injection mouth, the air outlet of the first making-up air device 501 is connected with the venting port in described high pressure compressed chamber, is provided with described auxiliary compressed element between the air outlet and the venting port in described high pressure compressed chamber of described first making-up air device 501.
As shown in Figure 11 (b), described main road compressed element comprises low pressure compression chamber and high pressure compressed chamber, described low pressure compression chamber and described high pressure compressed chamber are connected in series, it is provided with second vapor injection mouth between described low pressure compression chamber and described high pressure compressed chamber, the air outlet of the first making-up air device 501 is connected with on described second vapor injection mouth, the air outlet of the 2nd making-up air device 502 is connected with the venting port in described high pressure compressed chamber, is provided with described auxiliary compressed element between the air outlet and the venting port in described high pressure compressed chamber of described 2nd making-up air device 502.
As shown in Figure 11 (c), described main road compressed element comprises low pressure compression chamber and high pressure compressed chamber, described low pressure compression chamber and described high pressure compressed chamber are connected in series, it is provided with second vapor injection mouth between described low pressure compression chamber and described high pressure compressed chamber, the air outlet of the first making-up air device 501 is connected with described second vapor injection mouth, the air outlet of described 2nd making-up air device 502 is connected on the inlet mouth of described auxiliary compressed element, the venting port of described auxiliary compression chamber is connected on the tonifying Qi pipeline between the air outlet of described first making-up air device 501 and described second vapor injection mouth.
As shown in Figure 11 (d), (e), (f), described compressor unit also comprises increase-volume compression chamber, and described increase-volume compression chamber is in parallel with described low pressure compression chamber.
As shown in Figure 11 (g), described auxiliary compressed element comprises the first auxiliary compressed element and the 2nd auxiliary compressed element, the air outlet of the 2nd making-up air device 502 connects on the inlet mouth of the 2nd auxiliary compressed element, the air outlet of the first making-up air device 501 is connected on the inlet mouth of the first auxiliary compressed element, and the venting port of the described first auxiliary compressed element and the venting port of the described 2nd auxiliary compressed element are all connected on the venting port of described main road compressed element.
As shown in Figure 11 (j), described auxiliary compressed element comprises the first auxiliary compressed element and the 2nd auxiliary compressed element, the air outlet of the 2nd making-up air device 502 connects on the inlet mouth of the 2nd auxiliary compressed element, the air outlet of the first making-up air device 501 is connected on the inlet mouth of the first auxiliary compressed element, the venting port of the described 2nd auxiliary compressed element is connected on the inlet mouth of the described first auxiliary compressed element, and the venting port of the described first auxiliary compressed element is connected on the venting port of described main road compressed element.
As Figure 11 (i), shown in (l), described main road compressed element comprises low pressure compression chamber and high pressure compressed chamber, and described low pressure compression chamber and described high pressure compressed chamber are connected in series; Or, as shown in Figure 11 (h), (k), described main road compressed element comprises 2 compression chambers, and 2 compression chambers are connected in parallel.
The compression chamber being connected with A entrance in Figure 11 (a) and (b) in compressor unit embodiment in systemic circulation as shown in Figure 2, (c) is as lower pressure stage, its free air delivery is Va, the compression chamber that the exhaust of low pressure compression chamber enters is as high pressure stage, its free air delivery is Vb, the compression chamber being connected with C entrance in the compression chamber being connected with B entrance in Figure 11 (a) and Figure 11 (b) and (c) is as auxiliary compression chamber, and its discharge capacity is Vc.
The discharge capacity of the compression chamber being connected with A entrance, B entrance and C entrance in the Figure 11 (g) in compressor unit embodiment in systemic circulation as shown in Figure 2 corresponds to Va, Vb and Vc respectively.
When refrigeration plant system adopts refrigeration agent to be R410A, R290, R32, the mixture containing R32 and R1234ze or the mixture containing R32 and R1234yf, in compressor unit embodiment shown in Figure 11 (a) and (b), (c) and (g), discharge capacity is as follows than embodiment:
Figure 11 (a) and (b) are with, in (c), Vb/Va ratio range is 0.5 to 1.0, and further optimization range is 0.75 to 0.9.
In Figure 11 (a), during for heat pump type air conditioner, Vc/Va ratio range is 0.05 to 0.25, and further optimization range is 0.07 to 0.15; During for air source hot pump water heater, Vc/Va ratio range is 0.05 to 0.45, and further optimization range is 0.1 to 0.3.
Figure 11 (b) is with, in (c), during for heat pump type air conditioner, Vc/Va ratio range is 0.07 to 0.45, and further optimization range is 0.08 to 0.3; During for air source hot pump water heater, Vc/Va ratio range is 0.08 to 0.65, and further optimization range is 0.12 to 0.5.
In Figure 11 (g), during for heat pump type air conditioner, Vc/Va ratio range is 0.05 to 0.25, and further optimization range is 0.07 to 0.15; During for air source hot pump water heater, Vc/Va ratio range is 0.05 to 0.45, and further optimization range is 0.1 to 0.3.
In Figure 11 (g), during for heat pump type air conditioner, Vb/Va ratio range is 0.07 to 0.45, and further optimization range is 0.08 to 0.3; During for air source hot pump water heater, Vb/Va ratio range is 0.08 to 0.65, and further optimization range is 0.12 to 0.5.
Wherein in an embodiment, as shown in Fig. 7, Figure 11, pipeline between described indoor heat exchanger 3 and described outdoor heat exchanger 2 is also provided with the 3rd making-up air device 503, described 3rd making-up air device 503 is connected between described outdoor heat exchanger 2 and described 2nd making-up air device 502, the 3rd throttling set 403 also it is provided with, through main road compressed element described in the gas flow that described 3rd making-up air device 503 is separated between described 2nd making-up air device 502 and the 3rd making-up air device 503; On tonifying Qi pipeline between described first making-up air device 501 and described main road compressed element, it is provided with a described auxiliary compressed element; On described 2nd making-up air device 502 and/or the tonifying Qi pipeline between described 3rd making-up air device 503 and described main road compressed element, it is provided with a described auxiliary compressed element.
As shown in Figure 12 (a), described main road compressed element comprises low pressure compression chamber and high pressure compressed chamber, described low pressure compression chamber and described high pressure compressed chamber are connected in series, being provided with second vapor injection mouth between described low pressure compression chamber and described high pressure compressed chamber, the air outlet of described 2nd making-up air device 502 is connected with at described second vapor injection mouth; Described auxiliary compressed element comprises the first auxiliary compressed element and the 2nd auxiliary compressed element; The air outlet of described first making-up air device 501 is connected on the inlet mouth of the described first auxiliary compressed element, and the venting port of the described first auxiliary compressed element is connected on the venting port in described high pressure compressed chamber; The air outlet of described 3rd making-up air device 503 is connected on the inlet mouth of the described 2nd auxiliary compressed element, and the venting port of the described 2nd auxiliary compression chamber is connected on the tonifying Qi pipeline between the air outlet of described 2nd making-up air device 502 and described second vapor injection mouth.
As shown in Figure 12 (b), described auxiliary compressed element comprises the first auxiliary compressed element, the 2nd auxiliary compressed element and the 3rd auxiliary compressed element; The air outlet of described first making-up air device 501 is connected on the inlet mouth of the described first auxiliary compressed element, the air outlet of described 2nd making-up air device 502 is connected on the inlet mouth of the described 2nd auxiliary compressed element, and the air outlet of described 3rd making-up air device 503 is connected on the inlet mouth of the described 3rd auxiliary compressed element; The venting port of the described first auxiliary compressed element, the 2nd auxiliary compressed element and the 3rd auxiliary compressed element is all connected on the venting port of described main road compressed element.
Described making-up air device is flash evaporation or intermediate heat, and in the embodiment as shown in Fig. 1 to Fig. 3, Fig. 7 to Figure 10, making-up air device is flash evaporation; As shown in Figure 4, the first making-up air device 501 is flash evaporation, and the 2nd making-up air device is intermediate heat; As shown in Figure 5, making-up air device is intermediate heat; As shown in Figure 6, the first making-up air device 501 is intermediate heat, and the 2nd making-up air device is flash evaporation.
Fig. 1 is preferably a kind of systemic circulation scheme of the present invention, first compressor unit 101 is vented after indoor heat exchanger 3, the first flash evaporation is entered through first throttle device 401, the gas that first flash evaporation is separated enters the gas supplementing opening of the first compressor unit 101, the liquid that first flash evaporation is separated enters the 2nd flash evaporation through the 2nd throttling set 402, the gas that 2nd flash evaporation is separated enters the 2nd compressor unit 102, the liquid that 2nd flash evaporation is separated through the 3rd throttling set 403 laggard enter outdoor heat exchanger 2 evaporate after enter the first compressor unit 101. first compressor unit 101 is the two spool compressor with second vapor injection mouth or accurate two grades of screw compressors, and the 2nd compressor unit 102 is rotor compressor. the refrigerant gas entering this compressor through the first compressor unit 101, first gas-liquid separator 601 be compressed into intermediate pressure mix with the refrigerant gas from gas supplementing opening and be further compressed laggard enter indoor heat exchanger 3, form main road of the present invention circulation. enter the gas supplementing opening of the first compressor unit 101 after the gas and vapor permeation that the refrigerant gas entering this compressor through the 2nd compressor unit 102, the 2nd gas-liquid separator 602 is separated with the first flash evaporation after compressing, then import the circulation of main road. compared with prior art, two-stage shwoot is excessively cold reduce further indoor heat exchanger entrance specific enthalpy in three grades of throttlings, improve the air compensation of the first compressor unit 101 so that ability and efficiency are all obviously promoted, the exhaust temperature of the first compressor unit 101 also reduces simultaneously simultaneously.
Fig. 2 is another kind preferably systemic circulation scheme of the present invention, the exhaust of the first compressor unit 101 enters indoor heat exchanger 3 through D outlet, the first flash evaporation is entered through first throttle device 401, the gas that first flash evaporation is separated enters the C entrance of the first compressor unit 101, the liquid that first flash evaporation is separated enters the 2nd flash evaporation through the 2nd throttling set 402, the gas that 2nd flash evaporation is separated enters the B entrance of the first compressor unit 101, the liquid that 2nd flash evaporation is separated through the 3rd throttling set 403 laggard enter outdoor heat exchanger 2 evaporate after enter the A entrance of compressor unit.
It should be noted that, when this refrigeration plant is heat pump type air conditioner, this refrigeration plant is also provided with four-way valve. Under heating condition, indoor heat exchanger 3 is condenser, and under cooling condition, indoor heat exchanger 3 is vaporizer. When this refrigeration plant is air energy heat pump water heater, indoor heat exchanger is condenser.
The inside of the first compressor unit 101 can be made up of 3 or 4 compression chambers, and A, B, C entrance of these compression chambers and compressor unit and D go out the connection relation of interruption-forming Figure 11 (a) to Figure 11 (l). Figure 11 (a) to Figure 11 (f) is two level compression second vapor injection and mechanical super cooling coupling embodiments, Figure 11 (g), (h) are single-stage compression two-stage mechanical super cooling example, Figure 11 is (i) two level compression two-stage mechanical super cooling embodiments, and Figure 11 (j) to (l) is single-stage or two grades of compression two-stage mechanical super cooling second vapor injection embodiments. Aforementioned system recycle scheme is all crossed cold further reduction by two-stage and is evaporated entrance specific enthalpy thus reach the object of raising ability and efficiency, also reduces the mixing exhaust temperature of compressor unit simultaneously.
Fig. 3 is a kind of change of the circulation of the refrigeration system shown in Fig. 1, with Fig. 1 the difference is that, the exhaust of the 2nd compressor unit 102 enters the first flash evaporation, is conducive to reducing tonifying Qi superheating temperature.
Fig. 4 to Fig. 6 is three kinds of changes of system shown in Figure 2 circulation, and the first flash evaporation and/or the 2nd flash evaporation are replaced as intermediate heat.
Fig. 1 circulate to system shown in Figure 6 in refrigeration agent indoor interchanger 3 out after all cross cold and reduce the specific enthalpy of outdoor heat exchanger 2 entrance through twice, and system shown in Figure 7 circulation that outdoor heat exchanger refrigeration agent out is carried out three times is excessively cold, analogize successively and can build by N(>=3) systemic circulation of individual flash evaporation and/or intermediate heat series connection, outdoor heat exchanger refrigeration agent out is carried out N time excessively cold. Figure 12 (a) and (b) are the inside of the compressor unit in Fig. 7 compositions and connect relation example.
Fig. 8 is that in the refrigeration system shown in Fig. 1, the 3rd throttling set cancellation or throttling set are special case during electric expansion valve standard-sized sheet.
Fig. 9 is that in the refrigeration system shown in Fig. 2, the 3rd throttling set cancellation or the 3rd throttling set are special case during electric expansion valve standard-sized sheet, and the compressor unit in the refrigeration system shown in Fig. 9 can be other any one forms except (a) and (d) in Figure 11.
Figure 10 is that in the refrigeration system shown in Fig. 7, the 4th throttling set cancellation or the 4th throttling set are special case during electric expansion valve standard-sized sheet.
Refrigeration system shown in Fig. 8 to Figure 10 makes the refrigeration agent entering indoor heat exchanger reach or be approximately saturated liquid, improves to maximum degree the heat absorption amount of unit mass refrigeration agent and reduces compression ratio merit.
The flash evaporation of refrigeration plant of the present invention can be unidirectional flash evaporation or two-way flash evaporation, it is also possible to is that other have the flash evaporation mending gas carrying liquid function. The first throttle device of refrigeration plant of the present invention and the 2nd throttling set can be kapillary, throttling short tube, thermal expansion valve, electric expansion valve, throttling orifice plate or aforementioned any reasonable combination.
From above description, it can be seen that the above embodiments of the present invention achieve following technique effect:
Refrigeration plant of the present invention is used for heat pump occasion can significantly improve heat processed and the coefficient of performance, can significantly improve refrigerating duty and Energy Efficiency Ratio for air-conditioning occasion, all can obviously reduce high pressure stage exhaust temperature or mixing exhaust temperature simultaneously.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations. Within the spirit and principles in the present invention all, any amendment of doing, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (22)

1. a refrigeration plant, comprise the outdoor heat exchanger (2), compressor unit, indoor heat exchanger (3) and the making-up air device that are connected successively, it is characterized in that, described making-up air device comprises the first making-up air device (501) and the 2nd making-up air device (502), on pipeline between described indoor heat exchanger (3) and described outdoor heat exchanger (2), it is provided with described first making-up air device (501) being connected successively and described 2nd making-up air device (502);
Wherein, between described indoor heat exchanger (3) and described first making-up air device (501), it is provided with first throttle device (401), between described first making-up air device (501) and described 2nd making-up air device (502), it is provided with the 2nd throttling set (402);
Described compressor unit comprises main road compressed element and auxiliary compressed element, and the gas flow equalization being separated with described 2nd making-up air device (502) through described first making-up air device (501) is to described main road compressed element; On described first making-up air device (501) and/or the tonifying Qi pipeline between described 2nd making-up air device (502) and described main road compressed element, it is provided with described auxiliary compressed element.
2. refrigeration plant according to claim 1, it is characterised in that,
Described main road compressed element comprises low pressure compression chamber and high pressure compressed chamber, described low pressure compression chamber and described high pressure compressed chamber are connected in series, it is provided with second vapor injection mouth between described low pressure compression chamber and described high pressure compressed chamber, the air outlet of the 2nd making-up air device (502) is connected with described second vapor injection mouth, the air outlet of the first making-up air device (501) is connected with the venting port in described high pressure compressed chamber, is provided with described auxiliary compressed element between the air outlet and the venting port in described high pressure compressed chamber of described first making-up air device (501).
3. refrigeration plant according to claim 1, it is characterized in that, described main road compressed element comprises low pressure compression chamber and high pressure compressed chamber, described low pressure compression chamber and described high pressure compressed chamber are connected in series, it is provided with second vapor injection mouth between described low pressure compression chamber and described high pressure compressed chamber, the air outlet of the first making-up air device (501) is connected with on described second vapor injection mouth, the air outlet of the 2nd making-up air device (502) is connected with the venting port in described high pressure compressed chamber, it is provided with described auxiliary compressed element between the air outlet and the venting port in described high pressure compressed chamber of described 2nd making-up air device (502).
4. refrigeration plant according to claim 1, it is characterized in that, described main road compressed element comprises low pressure compression chamber and high pressure compressed chamber, described low pressure compression chamber and described high pressure compressed chamber are connected in series, it is provided with second vapor injection mouth between described low pressure compression chamber and described high pressure compressed chamber, the air outlet of the first making-up air device (501) is connected with described second vapor injection mouth, the air outlet of described 2nd making-up air device (502) is connected on the inlet mouth of described auxiliary compressed element, the venting port of described auxiliary compressed element is connected on the tonifying Qi pipeline between the air outlet of described first making-up air device (501) and described second vapor injection mouth.
5. refrigeration plant according to the arbitrary item of claim 2 to 4, it is characterised in that, described compressor unit also comprises increase-volume compression chamber, and described increase-volume compression chamber is in parallel with described low pressure compression chamber.
6. refrigeration plant according to claim 1, it is characterized in that, described auxiliary compressed element comprises the first auxiliary compressed element and the 2nd auxiliary compressed element, the air outlet of the 2nd making-up air device (502) connects on the inlet mouth of the 2nd auxiliary compressed element, the air outlet of the first making-up air device (501) is connected on the inlet mouth of the first auxiliary compressed element, and the venting port of the described first auxiliary compressed element and the venting port of the described 2nd auxiliary compressed element are all connected on the venting port of described main road compressed element.
7. refrigeration plant according to claim 1, it is characterized in that, described auxiliary compressed element comprises the first auxiliary compressed element and the 2nd auxiliary compressed element, the air outlet of the 2nd making-up air device (502) connects on the inlet mouth of the 2nd auxiliary compressed element, the air outlet of the first making-up air device (501) is connected on the inlet mouth of the first auxiliary compressed element, the venting port of the described 2nd auxiliary compressed element is connected on the inlet mouth of the described first auxiliary compressed element, and the venting port of the described first auxiliary compressed element is connected on the venting port of described main road compressed element.
8. refrigeration plant according to claim 6 or 7, it is characterised in that, described main road compressed element comprises low pressure compression chamber and high pressure compressed chamber, and described low pressure compression chamber and described high pressure compressed chamber are connected in series; Or, described main road compressed element comprises 2 compression chambers, and 2 compression chambers are connected in parallel.
9. refrigeration plant according to claim 1, it is characterized in that, pipeline between described indoor heat exchanger (3) and described outdoor heat exchanger (2) is also provided with the 3rd making-up air device (503), described 3rd making-up air device (503) is connected between described outdoor heat exchanger (2) and described 2nd making-up air device (502), the 3rd throttling set (402) also it is provided with, through main road compressed element described in the gas flow that described 3rd making-up air device (503) is separated between described 2nd making-up air device (502) and the 3rd making-up air device (503); On tonifying Qi pipeline between described first making-up air device (501) and described main road compressed element, it is provided with a described auxiliary compressed element; On described 2nd making-up air device (502) and/or the tonifying Qi pipeline between described 3rd making-up air device (503) and described main road compressed element, it is provided with a described auxiliary compressed element.
10. refrigeration plant according to claim 9, it is characterized in that, described main road compressed element comprises low pressure compression chamber and high pressure compressed chamber, described low pressure compression chamber and described high pressure compressed chamber are connected in series, being provided with second vapor injection mouth between described low pressure compression chamber and described high pressure compressed chamber, the air outlet of described 2nd making-up air device (502) is connected with at described second vapor injection mouth; Described auxiliary compressed element comprises the first auxiliary compressed element and the 2nd auxiliary compressed element; The air outlet of described first making-up air device (501) is connected on the inlet mouth of the described first auxiliary compressed element, and the venting port of the described first auxiliary compressed element is connected on the venting port in described high pressure compressed chamber; The air outlet of described 3rd making-up air device (503) is connected on the inlet mouth of the described 2nd auxiliary compressed element, and the venting port of the described 2nd auxiliary compression chamber is connected on the tonifying Qi pipeline between the air outlet of described 2nd making-up air device (502) and described second vapor injection mouth.
11. refrigeration plants according to claim 9, it is characterised in that, described auxiliary compressed element comprises the first auxiliary compressed element, the 2nd auxiliary compressed element and the 3rd auxiliary compressed element; The air outlet of described first making-up air device (501) is connected on the inlet mouth of the described first auxiliary compressed element, the air outlet of described 2nd making-up air device (502) is connected on the inlet mouth of the described 2nd auxiliary compressed element, and the air outlet of described 3rd making-up air device (503) is connected on the inlet mouth of the described 3rd auxiliary compressed element; The venting port of the described first auxiliary compressed element, the 2nd auxiliary compressed element and the 3rd auxiliary compressed element is all connected on the venting port of described main road compressed element.
12. refrigeration plants according to the arbitrary item of claim 2 to 4, it is characterised in that, the free air delivery of described low pressure compression chamber is Va, and the free air delivery in described high pressure compressed chamber is Vb; Refrigeration plant system adopts refrigeration agent to be R410A, R290, R32, the mixture containing R32 and R1234ze or the mixture containing R32 and R1234yf; Wherein, the ratio range of Vb and Va is 0.5 to 1.0.
13. refrigeration plants according to claim 12, it is characterised in that, the ratio range of Vb and Va is 0.75 to 0.9.
14. refrigeration plants according to claim 2, it is characterised in that, the free air delivery of described low pressure compression chamber is Va, and the free air delivery of described auxiliary compressed element is Vc; Refrigeration plant system adopts refrigeration agent to be R410A, R290, R32, the mixture containing R32 and R1234ze or the mixture containing R32 and R1234yf; Wherein, when described refrigeration plant is used for heat pump type air conditioner, the ratio range of Vc and Va is 0.05 to 0.25; Or when described refrigeration plant is used for air source hot pump water heater, the ratio range of Vc and Va is 0.05 to 0.45.
15. refrigeration plants according to claim 14, it is characterised in that, when described refrigeration plant is used for heat pump type air conditioner, the ratio range of Vc and Va is 0.07 to 0.15; Or, when described refrigeration plant is used for air source hot pump water heater, the ratio range of Vc and Va is 0.1 to 0.3.
16. refrigeration plants according to claim 3 or 4, it is characterised in that, the free air delivery of described low pressure compression chamber is Va, and the free air delivery of described auxiliary compressed element is Vc; Refrigeration plant system adopts refrigeration agent to be R410A, R290, R32, the mixture containing R32 and R1234ze or the mixture containing R32 and R1234yf; Wherein, when described refrigeration plant is used for heat pump type air conditioner, the ratio range of Vc and Va is 0.07 to 0.45; Or, when described refrigeration plant is used for air source hot pump water heater, the ratio range of Vc and Va is 0.08 to 0.65.
17. refrigeration plants according to claim 16, it is characterised in that, when described refrigeration plant is used for heat pump type air conditioner, the ratio range of Vc and Va is 0.08 to 0.3; Or, when described refrigeration plant is used for air source hot pump water heater, the ratio range of Vc and Va is 0.12 to 0.5.
18. refrigeration plants according to claim 6, it is characterised in that, the free air delivery of described main road compressed element is Va, and the free air delivery of the described first auxiliary compressed element is Vc, and the described 2nd auxiliary compressed element is Vb; Refrigeration plant system adopts refrigeration agent to be R410A, R290, R32, the mixture containing R32 and R1234ze or the mixture containing R32 and R1234yf; Wherein, when described refrigeration plant is used for heat pump type air conditioner, the ratio range of Vb and Va is the ratio range of 0.07 to 0.45, Vc and Va is 0.05 to 0.25; Or, when described refrigeration plant is used for air source hot pump water heater, the ratio range of Vb and Va is the ratio range of 0.08 to 0.65, Vc and Va is 0.05 to 0.45.
19. refrigeration plants according to claim 16, it is characterised in that, when described refrigeration plant is used for heat pump type air conditioner, the ratio range of Vb and Va is the ratio range of 0.08 to 0.3, Vc and Va is 0.07 to 0.15; Or, when described refrigeration plant is used for air source hot pump water heater, the ratio range of Vb and Va is the ratio range of 0.12 to 0.5, Vc and Va is 0.1 to 0.3.
20. refrigeration plants according to claim 1,2,3,4,6,7,9,10 or 11, it is characterised in that, described making-up air device is flash evaporation or intermediate heat.
21. refrigeration plants according to claim 1,2,3,4,6 or 7, it is characterised in that, also it is provided with the 3rd throttling set (403) between described 2nd making-up air device (502) and described outdoor heat exchanger (2).
22. refrigeration plants according to claim 9,10 or 11, it is characterised in that, also it is provided with the 4th throttling set (404) between described 3rd making-up air device (503) and described outdoor heat exchanger (2).
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