CN113218098B - Gas processing method and system based on three-device refrigerant compression cycle - Google Patents
Gas processing method and system based on three-device refrigerant compression cycle Download PDFInfo
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- CN113218098B CN113218098B CN202110356849.2A CN202110356849A CN113218098B CN 113218098 B CN113218098 B CN 113218098B CN 202110356849 A CN202110356849 A CN 202110356849A CN 113218098 B CN113218098 B CN 113218098B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
Abstract
The invention provides a gas treatment method and a gas treatment system based on three-device refrigerant circulation. The gas treatment comprises heating, refrigerating and dehumidifying, gas sequentially passes through the first gas heat exchanger and the second gas heat exchanger during heating and is heated by a refrigerant to realize heating, refrigerant circulation during heating comprises a first heating circulation and a second heating circulation, and the four-way valve is switched to realize defrosting of the evaporator while heating. During refrigeration, gas passes through the first gas heat exchanger and the second gas heat exchanger in sequence and is cooled by a refrigerant to realize refrigeration. During dehumidification, the gas is firstly refrigerated and dehumidified by the first gas heat exchanger and then heated by the second gas heat exchanger to reduce the relative humidity. The invention can improve the system energy efficiency, ensure the heating effect, continuously supply heat to the system and the like, and can be used for various air-conditioning heat pump dehumidification systems, including various different occasions such as commercial, civil and industrial occasions.
Description
Technical Field
The invention relates to a system for realizing functions of gas heating, refrigeration, dehumidification and the like by using refrigerant compression circulation of three heat exchangers.
Background
A conventional refrigerant compression cycle has only two, namely an evaporator and a condenser, and four processes, evaporation, compression, condensation and expansion.
The process from evaporation to compression is reasonable, and the low-temperature gas generated by evaporation is suitable for directly entering a compressor to be compressed, because the low-temperature cold gas has lower compression power consumption than the high-temperature gas, and the process from condensation to expansion is unreasonable. Because the condensed refrigerant hot liquid also contains a large amount of sensible heat, for refrigeration, the hot fluid directly expands and reduces the pressure, and the cold energy of the evaporator can be counteracted.
For heating, the heated air temperature is greatly lower than the temperature of the refrigerant hot fluid, so that the sensible heat of the refrigerant hot fluid can be directly utilized, and meanwhile, after the sensible heat of the refrigerant hot fluid is absorbed, the refrigerating capacity of the evaporator can be increased, namely the capacity of the evaporator for taking heat from the environment is increased, and a double effect is achieved.
For heating, no good defrosting mode exists at present. Frosting tends to cause deterioration and interruption of heating.
The existing air conditioner mainly adjusts the temperature, has a weak humidity processing function, and particularly cannot simultaneously utilize an evaporator to cool and dehumidify so as to reduce the absolute moisture content and utilize condensation to increase the temperature so as to reduce the relative humidity.
For a comfortable air conditioner, humidity control is a more basic artificial environment requirement, the time required for cooling and heating is short all year round, and the maintenance of proper relative humidity is required all year round to ensure the healthy and sanitary environment of people and the service life of building equipment.
Dehumidification in the plum rain season in southern areas is a prominent problem.
For refrigeration, the temperature of air supply cooled by an air conditioner evaporator is saturated air, condensation is easy to generate, and partial precision air conditioners adopt reheating to control the relative humidity of the air supply, but usually adopt an electric heating mode, so that the energy consumption is high.
Disclosure of Invention
The invention provides a gas processing method and a gas processing system based on three-device novel refrigerant compression cycle, which can effectively solve the problems.
A gas processing method based on three-device refrigerant circulation is characterized in that the three devices are a first processing gas heat exchanger, a second gas processing heat exchanger and an outdoor air heat exchanger, the gas processing method comprises heating, refrigerating and dehumidifying, the refrigerant circulation during heating comprises a first heating circulation and a second heating circulation, the first heating circulation is that a refrigerant sequentially passes through a compressor, a second gas heat exchanger, a four-way valve, a first gas heat exchanger, a throttling mechanism and an outdoor air heat exchanger and then returns to the compressor through the four-way valve, the outdoor air is cooled by the refrigerant through the outdoor air heat exchanger, and processed gas is continuously heated by the refrigerant sequentially passing through the first gas heat exchanger and the second gas heat exchanger to realize heating. The second heating cycle is that the refrigerant passes through the compressor, the second gas heat exchanger, the four-way valve, the outdoor air heat exchanger, the throttling mechanism and the first gas heat exchanger in sequence and then returns to the compressor through the four-way valve. The refrigerant carries out on-line defrosting on the outdoor air heat exchanger. The processed gas passes through the first gas heat exchanger and the second gas heat exchanger in sequence and is heated by a refrigerant to realize heating. The first heating cycle and the second heating cycle are switched by a four-way valve.
The refrigerant circulation during refrigeration is as follows: the refrigerant passes through the compressor, the refrigerant channel bypass of the second gas heat exchanger or the refrigerant channel bypass of the second gas heat exchanger, the four-way valve, the outdoor air heat exchanger, the throttling mechanism and the first gas heat exchanger in sequence, and then returns into the compressor through the four-way valve. Outdoor air is heated by a refrigerant through the outdoor air heat exchanger, treated gas is cooled to realize refrigeration through the first gas heat exchanger, and the temperature of the treated gas is unchanged or the treated gas is slightly reheated through the second gas heat exchanger, so that air supply saturation is avoided.
The refrigerant cycle during dehumidification is as follows: the refrigerant sequentially passes through the compressor, the second gas heat exchanger, the four-way valve, the outdoor air heat exchanger, the throttling mechanism and the first gas heat exchanger, and then returns to the compressor through the four-way valve. Outdoor air is heated by a refrigerant through an outdoor air heat exchanger, and treated gas is firstly refrigerated and dehumidified by a first gas heat exchanger and then heated by a second gas heat exchanger to reduce relative humidity.
Furthermore, in the refrigerant circulation during dehumidification, the temperature and the relative humidity of the processed gas are adjusted by adjusting the refrigerant flow passing through the second gas heat exchanger and the bypass of the refrigerant channel of the second gas heat exchanger.
Further, the flow rate of the introduced gas to be treated in the second heating cycle is smaller than that in the first heating cycle.
Further, the four-way valve is replaced by a plurality of valve combinations.
Further, the processed gas is outdoor fresh air or mixed air of indoor air and outdoor fresh air.
The invention provides a gas treatment system based on refrigerant circulation of three devices. One ends of refrigerant channel interfaces of the first gas heat exchanger and the outdoor air heat exchanger are respectively connected with one interface of the four-way valve, the other ends of the refrigerant channel interfaces of the first gas heat exchanger and the outdoor air heat exchanger are respectively connected with two ends of the throttling mechanism, a compressor inlet and a refrigerant channel outlet of the second gas heat exchanger are respectively connected with the other two interfaces of the four-way valve, and a compressor outlet is connected with a refrigerant channel inlet of the second gas heat exchanger. The first gas heat exchanger is arranged at the upstream of the second gas heat exchanger, the treated gas is firstly introduced into the gas channel of the first gas heat exchanger and then introduced into the gas channel of the second gas heat exchanger, and the outdoor air is introduced into the gas channel of the outdoor air heat exchanger. The system has the functions of heating, dehumidifying and on-line defrosting and heating, and realizes function conversion through four-way valve switching. During heating, the refrigerant sequentially passes through the compressor, the second gas heat exchanger, the four-way valve, the first gas heat exchanger, the throttling mechanism and the outdoor air heat exchanger, and then returns to the compressor through the four-way valve. The gas being treated is heated.
When on-line defrosting and heating are carried out, the refrigerant sequentially passes through the compressor, the second gas heat exchanger, the four-way valve, the outdoor air heat exchanger, the throttling mechanism and the first gas heat exchanger, and then returns into the compressor through the four-way valve. And carrying out on-line defrosting on the outdoor air heat exchanger.
During dehumidification, the refrigerant sequentially passes through the compressor, the second gas heat exchanger, the four-way valve, the outdoor air heat exchanger, the throttling mechanism and the first gas heat exchanger, and then returns to the compressor through the four-way valve. The treated gas is firstly refrigerated and dehumidified by the first gas heat exchanger and then heated by the second gas heat exchanger to reduce the relative humidity.
Furthermore, the system is also provided with a second gas heat exchanger refrigerant channel bypass and a bypass valve, and two ends of the bypass valve are respectively connected with an inlet and an outlet of the refrigerant channel of the second heat exchanger. The system has the functions of heating, refrigerating, dehumidifying and on-line defrosting and heating, and the function conversion is realized through the four-way valve switching and the bypass valve adjusting. When heating, the bypass valve is completely closed, and the refrigerant sequentially passes through the compressor, the second gas heat exchanger, the four-way valve, the first gas heat exchanger, the throttling mechanism and the outdoor air heat exchanger and then returns to the compressor through the four-way valve. The gas being treated is heated.
When on-line defrosting and heating are carried out, the bypass valve is completely closed, and the refrigerant sequentially passes through the compressor, the second gas heat exchanger, the four-way valve, the outdoor air heat exchanger, the throttling mechanism and the first gas heat exchanger and then returns to the compressor through the four-way valve. The refrigerant carries out on-line defrosting on the outdoor air heat exchanger. The ventilation of outdoor air can be realized at the moment, and the ventilation can also be stopped.
During refrigeration, the bypass valve is opened, and the refrigerant sequentially passes through the compressor, the refrigerant channel bypass of the second gas heat exchanger, the four-way valve, the outdoor air heat exchanger, the throttling mechanism and the first gas heat exchanger and then returns into the compressor through the four-way valve.
During dehumidification, the refrigerant sequentially passes through the compressor, the second gas heat exchanger, the four-way valve, the outdoor air heat exchanger, the throttling mechanism and the first gas heat exchanger, and then returns to the compressor through the four-way valve. The treated gas is firstly refrigerated and dehumidified by the first gas heat exchanger and then heated by the second gas heat exchanger to reduce the relative humidity.
Furthermore, the bypass refrigerant flow passing through the second gas heat exchanger and the bypass of the second gas heat exchanger can be adjusted through a bypass valve, so that the temperature and the relative humidity of the treated gas can be adjusted.
Further, the four-way valve is replaced by a plurality of valve combinations.
Further, the system also includes a first fan for delivering the gas to be treated, and a second fan for delivering outside air.
Furthermore, the gas is outdoor fresh air or mixed air of indoor air and outdoor fresh air.
The gas treatment method and the gas treatment system based on the three-refrigerant circulation have the following advantages:
1. the system energy efficiency, especially the heating energy efficiency is improved;
2. the system functions are perfected, including the independent dehumidification function of the air conditioning system and the improvement of the air quality;
3. saturated air supply during refrigeration is avoided;
4. ensuring heating effect, uninterrupted heat supply of the system and the like;
5, the method is simple and reliable and has the advantage of low cost.
The invention can be used for various air-conditioning heat pump dehumidification systems, including various different occasions such as commercial, civil and industrial occasions.
Drawings
FIG. 1 is a cooling/heating/dehumidifying system of the present invention;
FIG. 2 is a heating cycle one of the system of FIG. 1;
FIG. 3 is a second heating cycle of the system of FIG. 1;
FIG. 4 is a refrigeration cycle of the system of FIG. 1;
FIG. 5 is a dehumidification cycle of the system of FIG. 1;
FIG. 6 is a heating/dehumidifying cycle system of the present invention;
FIG. 7 is a heating cycle one of the system of FIG. 6;
FIG. 8 is a second heating cycle of the system of FIG. 6;
FIG. 9 is a dehumidification cycle of the system of FIG. 6;
FIG. 10 is a system of heating example one;
FIG. 11 is a comparative system of FIG. 10;
FIG. 12 is a system of heating example two;
fig. 13 is a comparative system of fig. 12.
Detailed Description
As shown in fig. 1, the system 100 has heating, cooling, dehumidifying and on-line defrosting heating functions, and includes a first gas heat exchanger 102, a second gas heat exchanger 101, an outdoor air heat exchanger 107, a compressor 104, a throttling mechanism 108, a four-way valve 105, a refrigerant pipeline 106, a bypass of a refrigerant channel of the second gas heat exchanger 101, a bypass valve 103 thereof, and a housing 109. One ends of refrigerant channel interfaces of the first gas heat exchanger 102 and the outdoor air heat exchanger 107 are respectively connected with one interface of the four-way valve through refrigerant pipelines, the other ends of the refrigerant channel interfaces of the first gas heat exchanger 102 and the outdoor air heat exchanger 107 are respectively connected with two ends of the throttling mechanism 108 through refrigerant pipelines, an inlet of the compressor 104 and an outlet of a refrigerant channel of the second gas heat exchanger 101 are respectively connected with the other two interfaces of the four-way valve, an outlet of the compressor 104 is connected with an inlet of a refrigerant channel of the second gas heat exchanger 101, and two ends of the bypass valve 103 are respectively connected with an inlet and an outlet of a refrigerant channel of the second heat exchanger 101. The shell 109 is provided with a gas inlet and a gas outlet, the first gas heat exchanger 102 and the second gas heat exchanger 101 are both arranged in the shell 109, the first gas heat exchanger 102 is arranged at the upstream of the second gas heat exchanger 101, the processed gas firstly passes through the first gas heat exchanger 102 and then passes through the second gas heat exchanger 101, and the outdoor air passes through the outdoor air heat exchanger 107.
During heating, the bypass valve 103 is closed, and two heating cycles are included, which can be alternately performed, specifically: as shown in fig. 2, the first heating cycle 100A includes a refrigerant passing through a compressor 104, a second gas heat exchanger 101 (functioning as a condenser), a four-way valve 105, a first gas heat exchanger 102 (functioning as a subcooler), a throttling mechanism 108, and an outdoor air heat exchanger 107 (functioning as an evaporator) in sequence, and then returning to the compressor 104 through the four-way valve 105, the processed gas passing through the first gas heat exchanger 102 (functioning as a subcooler) and the second gas heat exchanger 101 (functioning as a condenser) in sequence, the gas being heated by the refrigerant in sequence, the refrigerant being condensed releases heat, the outdoor air passing through the outdoor air heat exchanger 107 (functioning as an evaporator), the outdoor air being cooled by the refrigerant, and the refrigerant being evaporated and absorbing heat. After the outdoor air heat exchanger 107 (functioning as an evaporator) frosts, the outdoor air heat exchanger can be switched to a second heating cycle through the four-way valve to defrost the outdoor air heat exchanger: in the second heating cycle 100B, as shown in fig. 3, the refrigerant sequentially passes through the compressor 104, the second gas heat exchanger 101 (functioning as a condenser), the four-way valve 105, the outdoor air heat exchanger 107 (functioning as a subcooler), the throttling mechanism 108, and the first gas heat exchanger 102 (functioning as an evaporator), and then returns to the compressor 104 through the four-way valve 105, at this time, the outdoor air heat exchanger 107 stops introducing the outdoor air, the high-pressure thermal fluid is introduced into the refrigerant side of the outdoor air heat exchanger 107 for defrosting, the outdoor air heat exchanger 107 is converted into the subcooler, and the first air heat exchanger 102 is converted into the subcooler. The gas passes through the first gas heat exchanger 102 (functioning as an evaporator) and the second gas heat exchanger 101 (functioning as a condenser) in this order, and the gas is heated by the refrigerant.
During the second heating circulation, the gas passes through the evaporator and the condenser in sequence, the evaporator cools the gas, the condenser heats the gas, and the purifying heating effect is the heat generated by the power consumption of the compressor, so the heating quantity is smaller than that of the first heating circulation, the air quantity can be reduced, and the air supply temperature is ensured.
As described above, since the second heating cycle has a smaller heating amount than the first heating cycle, heating is performed by using the first heating cycle as a main cycle and the second heating cycle as an auxiliary cycle. After the second heating cycle completes defrosting of the outdoor air heat exchanger 107, the first heating cycle is switched to continue heating.
In the refrigeration cycle 100C, as shown in fig. 4, a refrigerant sequentially passes through the compressor 104, the bypass of the refrigerant channel of the second gas heat exchanger 101, the four-way valve 105, the outdoor air heat exchanger 107 (functioning as a condenser), the throttling mechanism 108, the first gas heat exchanger 102 (functioning as an evaporator), and then returns to the compressor 104 through the four-way valve 105; at this time, the outdoor air is heated by the refrigerant through the outdoor air heat exchanger 107, and the outdoor air heat exchanger 107 functions as a condenser. The second gas heat exchanger 101 is bypassed, that is, the second gas heat exchanger bypass valve 103 is opened, the refrigerant passes through the bypass valve 103, and the gas passes through the first gas heat exchanger 102, that is, the evaporator, and is cooled by the refrigerant. Under special circumstances, valves (not shown) may be added to the inlet and outlet of the refrigerant channel of the second gas heat exchanger 101 to prevent a small amount of hot refrigerant from entering the second gas heat exchanger 101 to heat the cooled air. In most cases, a small amount of hot refrigerant passes through the second gas heat exchanger 101, and can slightly reheat saturated cold air behind the evaporator, so that air supply saturation is avoided, and the quality of the air is facilitated.
As shown in fig. 5, the dehumidification cycle 100D includes a compressor 104, a second gas heat exchanger 101 (functioning as a condenser), a four-way valve 105, an outdoor air heat exchanger 107 (functioning as a subcooler), a throttling mechanism 108, a first gas heat exchanger 102 (functioning as an evaporator), and a four-way valve 105 for returning the refrigerant to the compressor 104, where the outdoor air is heated by the outdoor air heat exchanger 107, the gas passes through the first gas heat exchanger 102, i.e., the evaporator, and is cooled and dehumidified by the refrigerant, and then passes through the second gas heat exchanger 101, i.e., the condenser, and the bypass refrigerant flow passing through the second gas heat exchanger 101 and the second gas heat exchanger 101 can be adjusted by the bypass valve of the second gas heat exchanger 101, so as to adjust the temperature and the relative humidity of the supplied air.
The system 200 of fig. 6 is a heating/dehumidifying system, and unlike the system 100, does not have a bypass valve and a bypass valve of the second gas heat exchanger 101, and thus has no cooling function, and also cannot adjust the temperature of the supply air by the bypass valve at the time of dehumidification because there is no bypass valve adjustment. The rest is the same as the system 100.
Fig. 7 shows a first heating cycle 200A of the system 200, in which a refrigerant passes through a compressor 104, a second gas heat exchanger 101 (functioning as a condenser), a four-way valve 105, a first gas heat exchanger 102 (functioning as a subcooler), a throttle mechanism 108, and an outdoor air heat exchanger 107 (functioning as an evaporator) in this order, and then returns to the compressor 104 through the four-way valve 105, thereby completing the cycle.
Fig. 8 shows a second heating cycle 200B, in which the refrigerant passes through the compressor 104, the second gas heat exchanger 101 (functioning as a condenser), the four-way valve 105, the outdoor air heat exchanger 107 (functioning as a subcooler), the throttle mechanism 108, and the first gas heat exchanger 102 (functioning as an evaporator) in this order, and then returns to the compressor 104 through the four-way valve 105, thereby completing the cycle.
Fig. 9 shows a dehumidification cycle 200C, in which a refrigerant passes through a compressor 104, a second gas heat exchanger 101 (functioning as a condenser), a four-way valve 105, an outdoor air heat exchanger 107 (functioning as a subcooler), a throttling mechanism 108, and a first gas heat exchanger 102 (functioning as an evaporator) in this order, and then returns to the compressor 104 through the four-way valve 105 to complete the cycle.
The invention is further illustrated below with reference to specific examples.
Example one
When the system 100 of the present invention (shown in fig. 10) is used to heat the indoor air (wherein the compressor is Danfoss VZH035CJ, R410A, the evaporator has an evaporation temperature of-10 ℃ and the condenser has a condensation temperature of 45 ℃) at 0 ℃ and 20 ℃ for the outdoor temperature, the overall performance of the system is as follows:
1. the total heating of the system is 19.8kW (10+5+2.4+2.4),
2. the conventional system heats 15kW (10+5), wherein the refrigeration is 10kW, and the power consumption is 5kW
3. Supercooling increase 2.4kW refrigeration
4. Supercooling is increased by 2.4kW for heating
5. Electricity consumption of 5kW
6.COP,3.96
With a conventional system (as shown in fig. 11), when indoor air is heated (where the compressor is a compressor, Danfoss VZH044CJ, R410A, the evaporation temperature of the evaporator is-10 ℃, and the condensation temperature of the condenser is 45 ℃), the overall performance of the system is as follows:
1. heating, 20kW
2. Electricity consumption, 6.51kW
3.COP,3.07
It can be seen that the system of the present invention has a reduced number of disadvantages compared to conventional systems,
a) rated heating capacity is the same
b) Actual heating capacity is increased, and defrosting is carried out without stopping machine
c) Increase of heat exchange area of evaporator
d) Reduced heat exchange area of condenser
e) Compressor reduction
f) Adding subcooler
g) Cost reduction
h) COP increased with 29% ((3.96-3.07)/3.07).
Example two
When the outdoor air is-10 ℃, the fresh air is heated by adopting the system 100 (shown in figure 10) of the invention (wherein, the compressor is Danfoss VZH028CH, R410A, the evaporation temperature of the evaporator is-20 ℃, and the condensation temperature of the condenser is 45 ℃), the overall performance of the system is as follows:
1. heating, 14.8kW (5+3.8+3+3),
2. the conventional system heats 8.8kW (5+3.8), refrigerates 5kW, consumes 3.8kW of electricity
3. Supercooling-increased 3kW refrigeration
4. Supercooling increase 3kW heating
5. Power consumption of 3.8kW
6.COP,3.9
With a conventional system (as shown in fig. 13), when indoor air is heated (where the compressor is Danfoss DCJ106T2, R410A, the evaporator has an evaporation temperature of-20 ℃ and the condenser has a condensation temperature of 45 ℃), the overall system performance is as follows:
1. heating, 15.43kW
2. Electricity consumption, 6.6kW
3.COP,2.33
It can be seen that the system of the present invention has a reduced number of disadvantages compared to conventional systems,
a) rated heating capacity is the same
b) Actual heating capacity is increased, and defrosting is carried out without stopping machine
c) Increase of heat exchange area of evaporator
d) Reduced heat exchange area of condenser
e) Compressor reduction
f) Adding subcooler
g) Cost reduction
h) COP increased by 67% ((3.9-2.33)/2.33).
Claims (10)
1. A gas processing method based on three-device refrigerant circulation is characterized in that the three devices are a first gas heat exchanger, a second gas heat exchanger and an outdoor air heat exchanger, the gas processing method comprises heating, refrigerating and dehumidifying, the refrigerant circulation during heating comprises a first heating circulation and a second heating circulation, wherein the first heating circulation is that a refrigerant sequentially passes through a compressor, the second gas heat exchanger, a four-way valve, the first gas heat exchanger, a throttling mechanism and the outdoor air heat exchanger and then returns to the compressor through the four-way valve, the outdoor air is cooled by the refrigerant after passing through the outdoor air heat exchanger, and the processed gas is continuously heated by the refrigerant after sequentially passing through the first gas heat exchanger and the second gas heat exchanger to realize heating; the second heating cycle is that the refrigerant passes through the compressor, the second gas heat exchanger, the four-way valve, the outdoor air heat exchanger, the throttling mechanism and the first gas heat exchanger in sequence and then returns to the compressor through the four-way valve; the refrigerant carries out on-line defrosting on the outdoor air heat exchanger; the processed gas passes through the first gas heat exchanger and the second gas heat exchanger in sequence and is heated by a refrigerant to realize heating; the first heating cycle and the second heating cycle are switched by a four-way valve;
the refrigerant circulation during refrigeration is as follows: the refrigerant sequentially passes through the compressor, a refrigerant channel bypass of the second gas heat exchanger or a refrigerant channel bypass of the second gas heat exchanger, the four-way valve, the outdoor air heat exchanger, the throttling mechanism and the first gas heat exchanger, and then returns into the compressor through the four-way valve; outdoor air is heated by a refrigerant through an outdoor air heat exchanger, treated gas is cooled through a first gas heat exchanger to realize refrigeration, and then passes through a second gas heat exchanger to be unchanged in temperature or is slightly reheated, so that air supply saturation is avoided;
the refrigerant cycle during dehumidification is as follows: the refrigerant sequentially passes through the compressor, the second gas heat exchanger, the four-way valve, the outdoor air heat exchanger, the throttling mechanism and the first gas heat exchanger and then returns to the compressor through the four-way valve; outdoor air is heated by a refrigerant through an outdoor air heat exchanger, and treated gas is firstly refrigerated and dehumidified by a first gas heat exchanger and then heated by a second gas heat exchanger to reduce relative humidity.
2. The gas processing method as claimed in claim 1, wherein in the refrigerant cycle during dehumidification, the temperature and relative humidity of the gas to be processed are adjusted by adjusting the flow rate of the refrigerant passing through the second gas heat exchanger and the bypass of the refrigerant passage of the second gas heat exchanger.
3. The gas treatment method according to claim 1, wherein the flow rate of the gas to be treated introduced in the second heating cycle is smaller than that in the first heating cycle.
4. The gas treatment process of claim 1, wherein the four-way valve is replaced by a plurality of valve combinations.
5. The gas treatment method according to claim 1, wherein the gas to be treated is fresh outdoor air or a mixture of fresh outdoor air and indoor air.
6. A gas treatment system based on three-device refrigerant circulation is characterized by comprising a first gas heat exchanger, a second gas heat exchanger, an outdoor air heat exchanger, a compressor, a throttling mechanism and a four-way valve; one ends of refrigerant channel interfaces of the first gas heat exchanger and the outdoor air heat exchanger are respectively connected with one interface of the four-way valve, the other ends of the refrigerant channel interfaces of the first gas heat exchanger and the outdoor air heat exchanger are respectively connected with two ends of the throttling mechanism, a compressor inlet and a refrigerant channel outlet of the second gas heat exchanger are respectively connected with the other two interfaces of the four-way valve, and a compressor outlet is connected with a refrigerant channel inlet of the second gas heat exchanger; the first gas heat exchanger is arranged at the upstream of the second gas heat exchanger, the treated gas is firstly introduced into a gas channel of the first gas heat exchanger and then introduced into a gas channel of the second gas heat exchanger, and the outdoor air is introduced into a gas channel of the outdoor air heat exchanger; the system has the functions of heating, dehumidifying and on-line defrosting and heating, and realizes function conversion by switching of the four-way valve; during heating, the refrigerant sequentially passes through the compressor, the second gas heat exchanger, the four-way valve, the first gas heat exchanger, the throttling mechanism and the outdoor air heat exchanger, and then returns to the compressor through the four-way valve; the gas being treated is heated;
when on-line defrosting and heating are carried out, a refrigerant sequentially passes through the compressor, the second gas heat exchanger, the four-way valve, the outdoor air heat exchanger, the throttling mechanism and the first gas heat exchanger, and then returns into the compressor through the four-way valve; carrying out on-line defrosting on the outdoor air heat exchanger;
during dehumidification, the refrigerant sequentially passes through the compressor, the second gas heat exchanger, the four-way valve, the outdoor air heat exchanger, the throttling mechanism and the first gas heat exchanger, and then returns to the compressor through the four-way valve; the treated gas is firstly refrigerated and dehumidified by the first gas heat exchanger and then heated by the second gas heat exchanger to reduce the relative humidity.
7. The system as claimed in claim 6, wherein the system is further provided with a second gas heat exchanger refrigerant channel bypass and a bypass valve, and two ends of the bypass valve are respectively connected with an inlet and an outlet of the refrigerant channel of the second heat exchanger; the system has the functions of heating, refrigerating, dehumidifying and on-line defrosting and heating, and realizes function conversion through four-way valve switching and bypass valve adjustment; when heating, the bypass valve is completely closed, and the refrigerant sequentially passes through the compressor, the second gas heat exchanger, the four-way valve, the first gas heat exchanger, the throttling mechanism and the outdoor air heat exchanger and then returns to the compressor through the four-way valve; the gas being treated is heated;
when on-line defrosting and heating are carried out, the bypass valve is completely closed, and a refrigerant sequentially passes through the compressor, the second gas heat exchanger, the four-way valve, the outdoor air heat exchanger, the throttling mechanism and the first gas heat exchanger and then returns into the compressor through the four-way valve; the refrigerant carries out on-line defrosting on the outdoor air heat exchanger;
during refrigeration, the bypass valve is opened, and a refrigerant sequentially passes through the compressor, the refrigerant channel bypass of the second gas heat exchanger, the four-way valve, the outdoor air heat exchanger, the throttling mechanism and the first gas heat exchanger and then returns into the compressor through the four-way valve;
during dehumidification, the refrigerant sequentially passes through the compressor, the second gas heat exchanger, the four-way valve, the outdoor air heat exchanger, the throttling mechanism and the first gas heat exchanger, and then returns to the compressor through the four-way valve; the treated gas is firstly refrigerated and dehumidified by the first gas heat exchanger and then heated by the second gas heat exchanger to reduce the relative humidity; the bypass refrigerant flow passing through the second gas heat exchanger and the bypass of the second gas heat exchanger can be adjusted through the bypass valve, and the temperature and the relative humidity of the gas to be processed can be adjusted.
8. The system of any of claims 6-7, wherein the four-way valve is replaced by a plurality of valve combinations.
9. A system according to any of claims 6 to 7, further comprising a first fan for delivering the gas to be treated and a second fan for delivering outside air.
10. A system according to any one of claims 6 to 7, wherein the gas is fresh outdoor air or a mixture of fresh indoor air and fresh outdoor air.
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| CN202110356849.2A CN113218098B (en) | 2021-04-01 | 2021-04-01 | Gas processing method and system based on three-device refrigerant compression cycle |
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| CN1587834A (en) * | 2004-09-07 | 2005-03-02 | 熊晓强 | Integrated dehumidifier |
| CN201050849Y (en) * | 2006-11-30 | 2008-04-23 | 江苏天舒电器有限公司 | Constant temperature air-conditioning dehumidifier for constant temperature of swimming pool water |
| CN201314724Y (en) * | 2008-10-10 | 2009-09-23 | 北京盈金时代科技有限公司 | Non-temperature rise manifold type internal heat defrosting energy saving refrigeration system |
| KR101231978B1 (en) * | 2011-04-27 | 2013-02-08 | 한국교통대학교산학협력단 | Dehumidifier and controlling method therefor |
| CN105143779B (en) * | 2013-04-10 | 2017-12-22 | 三菱电机株式会社 | Dehydrating unit |
| CN210832212U (en) * | 2019-04-09 | 2020-06-23 | 恒泽节能有限公司 | Regulating system for regulating air temperature, humidity and water temperature by using outdoor air heat exchanger |
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Application publication date: 20210806 Assignee: Hanshou County Xinmeijia Decoration Co.,Ltd. Assignor: Hunan Yali Technology Development Co.,Ltd. Contract record no.: X2023980036970 Denomination of invention: A Gas Treatment Method and System Based on Three Cooler Refrigerant Compression Cycle Granted publication date: 20220510 License type: Common License Record date: 20230627 |
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