CN104110740A - Air conditioning system and control method thereof - Google Patents
Air conditioning system and control method thereof Download PDFInfo
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- CN104110740A CN104110740A CN201410359869.5A CN201410359869A CN104110740A CN 104110740 A CN104110740 A CN 104110740A CN 201410359869 A CN201410359869 A CN 201410359869A CN 104110740 A CN104110740 A CN 104110740A
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Abstract
The invention provides an air conditioning system and a control method thereof. The air conditioning system comprises a combustible refrigerant circulating system, a high-pressure carbon dioxide circulating system and a controller, the combustible refrigerant circulating system and the high-pressure carbon dioxide circulating system exchange heat via a first heat exchanger, the high-pressure carbon dioxide circulating system comprises a liquid storage tank and a second heat exchanger, the first heat exchanger is provided with a first temperature sensing device, the second heat exchanger is provided with a second temperature sensing device, and the controller is used for comparing a first temperature of the first heat exchanger with a synchronous second temperature of the second heat exchanger when the air conditioning is heating. When the difference between the first temperature and a preset value is larger than the second temperature, carbon dioxide refrigerating medium is controlled to enter the high-pressure carbon dioxide circulating system, and when the difference between the first temperature and the preset value is smaller than or equal to the second temperature, the carbon dioxide refrigerating medium is controlled to be stopped from entering the high-pressure carbon dioxide circulating system. The air conditioning system and the control method thereof have the advantage that the existing problem that carbon dioxide serving as a refrigerating medium can only refrigerate and cannot heat is solved.
Description
Technical field
The present invention relates to air-conditioning system technical field, more particularly, relate to a kind of air-conditioning system and control method thereof.
Background technology
Carbon dioxide coolant is commonly called R744 cold-producing medium, there is nontoxic, the advantage such as density is little, non-combustible, not combustion-supporting, stable chemical nature, although may have some carbon dioxides in the process of refrigeration leaks out from air-conditioning system, but these carbon dioxides can't cause too much influence to environment.
Because carbon dioxide latent heat is very large, heat exchange property is very good, and viscosity is little, and operating pressure is large, and the impact that mobile pressure drop produces circulation is very little, therefore, uses carbon dioxide as refrigerating medium, to become the main development direction of air-conditioning system.
Existing air-conditioning system, all to adopt normal pressure or low pressure CO 2 gas as refrigerating medium, therefore, 0 ℃ of following low leaving air temp in the time of can only obtaining air conditioner refrigerating, 30 ℃ of above high leaving air temps in the time of can not obtaining air-conditioning heating, be that existing employing carbon dioxide can only freeze and can not heat as the air-conditioning system of refrigerating medium, therefore, greatly limited the application of carbon dioxide refrigerating medium in air-conditioning system.
Summary of the invention
In view of this, the invention provides a kind of air-conditioning system and control method thereof, using the problem that available technology adopting carbon dioxide can only freeze and can not heat as the air-conditioning system of refrigerating medium that solves.
For achieving the above object, the invention provides following technical scheme:
An air-conditioning system, comprising:
By the first heat exchanger, carry out the combustible refrigerant circulatory system and the high-pressure carbon dioxide circulatory system of exchange heat, the described high-pressure carbon dioxide circulatory system comprises fluid reservoir and the transmission pump being connected with described fluid reservoir and the second heat exchanger that is arranged on described the first heat exchanger outlet place and stores carbon dioxide refrigerating medium, wherein, described the first heat exchanger is provided with the first temperature sensing device, and described the second heat exchanger is provided with the second temperature sensing device;
The controller being connected with the second temperature sensing device with described the first temperature sensing device, for when described air-conditioning system heats, the first temperature of described the first heat exchanger and the second temperature of described the second heat exchanger that described the second temperature sensing device detects that relatively under synchronization, described the first temperature sensing device detects, and when the difference of described the first temperature and preset value is greater than the second temperature, the carbon dioxide refrigerating medium of controlling in described fluid reservoir enters the described high-pressure carbon dioxide circulatory system, when the difference of described the first temperature and preset value is less than or equal to the second temperature, the carbon dioxide refrigerating medium two of controlling in described fluid reservoir stops entering the described high-pressure carbon dioxide circulatory system.
Preferably, described controller comprises:
Comparing unit, for more described the first temperature and the second temperature, and when the difference of described the first temperature and preset value is greater than described the second temperature, produce the first control signal and be sent to the first performance element, when the difference of described the first temperature and preset value is less than or equal to described the second temperature, produce the second control signal and be sent to the second performance element, wherein, described preset value is less than or equal to 5 ℃;
The first performance element, for receiving described the first control signal, and the carbon dioxide refrigerating medium of controlling in described fluid reservoir according to described the first control signal enters the described high-pressure carbon dioxide circulatory system;
The second performance element, for receiving described the second control signal, and the carbon dioxide refrigerating medium of controlling in described fluid reservoir according to described the second control signal stops entering the described high-pressure carbon dioxide circulatory system.
Preferably, the pressure of the described high-pressure carbon dioxide circulatory system for to be more than or equal to 10MPa under 45 ℃ of conditions, and the carbon dioxide refrigerating medium in described fluid reservoir is carbon dioxide liquid; On pipeline between described fluid reservoir and described the first heat exchanger, there is the first valve, in the inlet ductwork of described fluid reservoir, there is the second valve, on the export pipeline of described fluid reservoir, there is the 3rd valve.
Preferably, described the first performance element is by opening the second valve and the 3rd valve, closing the first valve, and the carbon dioxide refrigerating medium of controlling in described fluid reservoir enters the described high-pressure carbon dioxide circulatory system;
Described the second performance element is by closing the second valve and the 3rd valve, opening the first valve, and the carbon dioxide refrigerating medium of controlling in described fluid reservoir stops entering the described high-pressure carbon dioxide circulatory system.
Preferably, described controller also comprises:
Judging unit, for after the carbon dioxide refrigerating medium of fluid reservoir enters the described high-pressure carbon dioxide circulatory system, judge whether described the second temperature remains unchanged, the carbon dioxide refrigerating medium of if so, controlling in described fluid reservoir stops entering the described high-pressure carbon dioxide circulatory system.
Application is a control method for the air-conditioning system described in any one as above, comprising:
Obtain the first temperature and the second temperature that synchronization detects;
When described air-conditioning system heats, the difference of more described the first temperature and preset value and the second temperature;
If the difference of described the first temperature and preset value is greater than described the second temperature, the carbon dioxide refrigerating medium of controlling in described fluid reservoir enters the described high-pressure carbon dioxide circulatory system;
If the difference of described the first temperature and preset value is less than or equal to described the second temperature, the carbon dioxide refrigerating medium of controlling in described fluid reservoir stops entering the described high-pressure carbon dioxide circulatory system.
Preferably, the carbon dioxide refrigerating medium in the described fluid reservoir of described control enters the process of the described high-pressure carbon dioxide circulatory system and is:
Open the second valve and the 3rd valve, close the first valve, with the carbon dioxide refrigerating medium of controlling in described fluid reservoir, enter the described high-pressure carbon dioxide circulatory system.
Preferably, the carbon dioxide refrigerating medium in the described fluid reservoir of described control stops entering the process of the described high-pressure carbon dioxide circulatory system and is:
Close the second valve and the 3rd valve, open the first valve, with the carbon dioxide refrigerating medium of controlling in described fluid reservoir, stop entering the described high-pressure carbon dioxide circulatory system.
Preferably, the carbon dioxide refrigerating medium in described fluid reservoir also comprises after entering the described high-pressure carbon dioxide circulatory system:
Judge whether described the second temperature remains unchanged, the carbon dioxide refrigerating medium of if so, controlling in described fluid reservoir stops entering the described high-pressure carbon dioxide circulatory system.
Preferably, before closing air-conditioning system, also comprise:
Open the second valve, close the first valve and the 3rd valve, so that the carbon dioxide refrigerating medium in the described high-pressure carbon dioxide circulatory system is converted to liquid and is stored in described fluid reservoir.
Compared with prior art, technical scheme provided by the present invention has the following advantages:
Air-conditioning system provided by the invention and control method thereof, by the first temperature sensing device, detect the first temperature, by the second temperature sensing device, detect the second temperature, and when the difference of the first temperature and preset value is greater than the second temperature, the carbon dioxide refrigerating medium of controlling in fluid reservoir enters the high-pressure carbon dioxide circulatory system, when the difference of the first temperature and preset value is less than or equal to the second temperature, the carbon dioxide refrigerating medium of controlling in fluid reservoir stops entering the high-pressure carbon dioxide circulatory system, therefore, when the carbon dioxide refrigerating medium in fluid reservoir is carbon dioxide liquid, it enters after the high-pressure carbon dioxide circulatory system, from the first heat exchanger, absorb amount of heat, and in the second heat exchanger place release heat, thereby can obtain higher leaving air temp, solved the problem that available technology adopting carbon dioxide can only freeze and can not heat as the air-conditioning system of refrigerating medium.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skills, do not paying under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.
The air-conditioning system structure chart that Fig. 1 provides for one embodiment of the present of invention;
Fig. 2 is the controller architecture schematic diagram of air-conditioning system provided by the invention;
The Air-condition system control method flow diagram that Fig. 3 provides for another embodiment of the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
One embodiment of the present of invention provide a kind of air-conditioning system, as shown in Figure 1, comprise the combustible refrigerant circulatory system 1 and the high-pressure carbon dioxide circulatory system 2, the refrigerant line of these two circulatory systems or refrigerating medium pipeline carry out the exchange of heat by the first heat exchanger 00, wherein, the combustible refrigerant circulatory system 1 comprises compressor 10, four-way change-over valve 11, the 3rd heat exchanger 12 and choke valve 13, the high-pressure carbon dioxide circulatory system 2 comprises the fluid reservoir 21 that is arranged on the first heat exchanger 00 refrigerating medium exit, the transmission pump 22 being connected with fluid reservoir 21 and the second heat exchanger 23, wherein, on the first heat exchanger 00 or refrigerant pipe exit has the first temperature sensing device 01 that detects the first temperature T 1, i.e. the first temperature sensor, in the second heat exchanger 23, there is the second temperature sensing device 24 that detects the second temperature T 2, i.e. the second temperature sensor.
In the present embodiment, the first cold-producing medium in the combustible refrigerant circulatory system 1 is combustible refrigerant, as R290 or R32 etc., the carbon dioxide refrigerating medium in the high-pressure carbon dioxide circulatory system 2 is pressurized liquid carbon dioxide, and the carbon dioxide refrigerating medium of fluid reservoir 21 storage inside is carbon dioxide liquid.Because carbon dioxide refrigerating medium is high-pressure carbon dioxide, therefore, the pressure of the high-pressure carbon dioxide circulatory system is also higher, and especially, under the condition of 45 ℃, the pressure of the high-pressure carbon dioxide circulatory system is more than or equal to 45MPa.
The air-conditioning system that the present embodiment provides also comprises: the controller 3 being connected with the second temperature sensing device 24 with the first temperature sensing device 01.The first temperature sensing device 01 and the second temperature sensing device 24 detect after the first temperature T 1 and the second temperature T 2, the first temperature T 1 detecting under synchronization and the second temperature T 2 are sent to controller 3, controller 3 receives after the first temperature T 1 and the second temperature T 2, compare the first temperature T 1 and the second temperature T 2, and when the difference of the first temperature T 1 and preset value T0 is greater than the second temperature T 2, control the carbon dioxide refrigerating medium in fluid reservoir 21, it is carbon dioxide coolant, enter the high-pressure carbon dioxide circulatory system 2, from the first heat exchanger 00, absorb amount of heat, and in second heat exchanger 23 place's release heat, higher leaving air temp while heating to produce, when the difference of the first temperature T 1 and preset value T0 is less than or equal to the second temperature T 2, the content that carbon dioxide in the high-pressure carbon dioxide circulatory system 2 is described has met designing requirement, therefore, controller 3 disconnects fluid reservoir 21 and the high-pressure carbon dioxide circulatory system 2, control the carbon dioxide refrigerating medium in fluid reservoir 21, be carbon dioxide coolant, stop entering the high-pressure carbon dioxide circulatory system 2.
Wherein, as shown in Figure 2, controller 3 comprises comparing unit 31, the first performance element 32 and the second performance element 33, particularly, comparing unit 31 is for comparing the first temperature T 1 and the second temperature T 2, and when the difference of the first temperature T 1 and preset value T0 is greater than the second temperature T 2, generation the first control signal is also sent to the first performance element 32, when the difference of the first temperature T 1 and preset value T0 is less than or equal to the second temperature T 2, produces the second control signal and be also sent to the second performance element 33; The first performance element 32 is for receiving the first control signal, and the carbon dioxide refrigerating medium of controlling in fluid reservoir 21 according to the first control signal enters the high-pressure carbon dioxide circulatory system 2; The second performance element 33 is for receiving the second control signal, and the carbon dioxide refrigerating medium of controlling in fluid reservoir 21 according to the second control signal stops entering the high-pressure carbon dioxide circulatory system 2.
In addition, controller 3 also comprises judging unit, for after the carbon dioxide refrigerating medium of fluid reservoir 21 enters the high-pressure carbon dioxide circulatory system 2, judge whether the second temperature T 2 remains unchanged, if so, the carbon dioxide refrigerating medium of controlling in fluid reservoir 21 stops entering the high-pressure carbon dioxide circulatory system 2.
In the present embodiment, as shown in Figure 1, fluid reservoir 21 is arranged in parallel the exit at the first heat exchanger 00, and, on pipeline between fluid reservoir 21 and the first heat exchanger 00, there is the first valve 10, in the inlet ductwork of fluid reservoir 21, there is the second valve 20, on the export pipeline of fluid reservoir 21, there is the 3rd valve 30, wherein, the horizontal level of the inlet pipe mouth of pipe of fluid reservoir 21 inside is higher than the horizontal level that goes out the mouth of pipe.
Based on this, the first performance element 32 can be opened fluid reservoir 21 by opening the second valve 20 and the 3rd valve 30, closing the first valve 10, thereby the carbon dioxide refrigerating medium of controlling in fluid reservoir 21 enters the high-pressure carbon dioxide circulatory system 2; The second performance element 33 can be by closing the second valve 20 and the 3rd valve 30, opening the first valve 10, disconnection fluid reservoir 21 is connected with the high-pressure carbon dioxide circulatory system 2, and the carbon dioxide refrigerating medium of controlling in fluid reservoir 21 stops entering the high-pressure carbon dioxide circulatory system 2.
The present embodiment is by judging whether the difference of the first temperature and preset value T0 is greater than the second temperature, determine whether making the carbon dioxide refrigerating medium in fluid reservoir to enter the high-pressure carbon dioxide circulatory system, and in other embodiments, also can adjust accordingly the manner of comparison of the first temperature and the second temperature, for example, when the difference of the first temperature and the first preset value is greater than the second temperature, control carbon dioxide refrigerating medium and enter the high-pressure carbon dioxide circulatory system, or, when the difference of the first temperature and the second preset value is less than the second temperature, control carbon dioxide refrigerating medium and stop entering the high-pressure carbon dioxide circulatory system, wherein, the first preset value and the second preset value can preset according to actual needs, the first preset value is less than the second preset value, and the first preset value is generally less than 5 ℃.
The air-conditioning system that the present embodiment provides, the 3rd heat exchanger can be for being arranged on outdoor heat exchanger, and the second heat exchanger can be for being arranged on indoor heat exchanger.Carbon dioxide liquid refrigerating medium enters after the high-pressure carbon dioxide circulatory system, from the first heat exchanger, absorb amount of heat, and in the second heat exchanger place release heat, and the first heat exchanger is the heat from outdoor absorption, that is to say, the air-conditioning system that the present embodiment provides, by pressurized liquid carbon dioxide refrigerating medium, is converted to indoor heat by outdoor heat.
That is to say, the air-conditioning system that the present embodiment provides, by the first temperature sensing device, detect the first temperature, by the second temperature sensing device, detect the second temperature, and when the difference of the first temperature and preset value is greater than the second temperature, the carbon dioxide refrigerating medium of controlling in fluid reservoir enters the high-pressure carbon dioxide circulatory system, when the difference of the first temperature and preset value is less than or equal to the second temperature, the carbon dioxide refrigerating medium of controlling in fluid reservoir stops entering the high-pressure carbon dioxide circulatory system, thereby can obtain higher leaving air temp, solved the problem that available technology adopting carbon dioxide can only freeze and can not heat as the air-conditioning system of refrigerating medium.
An alternative embodiment of the invention provides a kind of method for supervising of air-conditioning system, be applied to the air-conditioning system that above-described embodiment provides, the structural representation of this air-conditioning system as shown in Figure 1, comprise the combustible refrigerant circulatory system and the high-pressure carbon dioxide circulatory system of by the first heat exchanger, carrying out heat exchange, the high-pressure carbon dioxide circulatory system comprises fluid reservoir, transmission pump and the second heat exchanger, the first heat exchanger has the first temperature sensing device, the second heat exchanger has the second temperature sensing device, and the controller being connected with the second temperature sensing device with the first temperature sensing device.
Based on this, the control method flow chart that the present embodiment provides as shown in Figure 3, comprising:
S301: obtain the first temperature and the second temperature that synchronization detects;
Air-conditioning system powers on, and opens heating mode, moves after approximately 3 minutes, and the first temperature sensing device and the second temperature sensing device start continuous detecting the first temperature and the second temperature, and the first temperature detecting under synchronization and the second temperature are sent to controller.
S302: when described air-conditioning system heats, the difference of more described the first temperature and preset value and the second temperature;
S303: if the difference of described the first temperature and preset value is greater than described the second temperature, the carbon dioxide refrigerating medium of controlling in described fluid reservoir enters the described high-pressure carbon dioxide circulatory system;
Controller receives and obtains after the first temperature and the second temperature detecting, more described the first temperature and the second temperature, if the difference of described the first temperature and preset value is greater than described the second temperature, and equal comparative result for this reason in continuous 1 minute, the carbon dioxide refrigerating medium of controlling in described fluid reservoir enters the high-pressure carbon dioxide circulatory system, wherein, described preset value is no more than 5 ℃.
Wherein, controlling the process that carbon dioxide refrigerating medium in described fluid reservoir enters the described high-pressure carbon dioxide circulatory system is: open the second valve and the 3rd valve, close the first valve, with the carbon dioxide refrigerating medium of controlling in described fluid reservoir, enter the described high-pressure carbon dioxide circulatory system.
In other embodiments of the invention, can adjust the manner of comparison of the first temperature and the second temperature, for example, when the difference of the first temperature and the first preset value is greater than the second temperature, control carbon dioxide refrigerating medium and enter the high-pressure carbon dioxide circulatory system, the first numerical value can be set according to actual needs, is generally no more than 5 ℃.
In the present embodiment, the carbon dioxide refrigerating medium of storing in fluid reservoir is pressurized liquid carbon dioxide refrigerating medium, therefore, when opening the second valve and the 3rd valve, closing after the first valve, carbon dioxide in fluid reservoir enters the high-pressure carbon dioxide circulatory system, from the first heat exchanger, absorb amount of heat, and in the second heat exchanger place release heat, thereby realized the output of higher leaving air temp.
Fluid reservoir is opened, after carbon dioxide enters the high-pressure carbon dioxide circulatory system, the first temperature sensing device and the second temperature sensing device still continue to detect the first temperature and the second temperature, continue to obtain the first temperature of detecting and the process of the second temperature and more described the first temperature and the second temperature, when the difference of the first temperature and preset value is less than or equal to the second temperature, enter step S304; Or, judge whether the second temperature remains unchanged, if so, and continuous 1 minutes in the second temperature all remain unchanged, the carbon dioxide refrigerating medium of controlling in described fluid reservoir stops entering the described high-pressure carbon dioxide circulatory system.
S304: if the difference of described the first temperature and preset value is less than or equal to described the second temperature, the carbon dioxide refrigerating medium of controlling in described fluid reservoir stops entering the described high-pressure carbon dioxide circulatory system.
When the difference of the first temperature detecting and preset value is less than or equal to the second temperature, the content that carbon dioxide in the high-pressure carbon dioxide circulatory system is described meets the requirements, if in continuous 1 minute, the difference of the first temperature and preset value is all less than or equal to the second temperature, and the carbon dioxide refrigerating medium of controlling in fluid reservoir stops entering the high-pressure carbon dioxide circulatory system.
Detailed process is: close the second valve and the 3rd valve, open the first valve, with the carbon dioxide refrigerating medium of controlling in fluid reservoir, stop entering the high-pressure carbon dioxide circulatory system.After closing the second valve and the 3rd valve, unlatching the first valve, fluid reservoir was disconnected with being connected of high-pressure carbon dioxide circulatory system pipeline, and the carbon dioxide refrigerating medium in fluid reservoir can not enter the high-pressure carbon dioxide circulatory system.
Equally, in other embodiments of the invention, when the difference of the first temperature and the second preset value is less than or equal to the second temperature, control carbon dioxide refrigerating medium and stop entering the high-pressure carbon dioxide circulatory system, wherein, second value also can preset according to actual needs, and second value is greater than the first numerical value.
In the present embodiment, while shutting down under the pattern that adopts carbon dioxide refrigerating medium to heat, need first inner blower corresponding to each heat exchanger to be shut down, then by four-way change-over valve break-in, switch to refrigeration mode, then open the second valve, close the first valve and the 3rd valve, the carbon dioxide refrigerating medium in the described high-pressure carbon dioxide circulatory system is converted to liquid and is stored in described fluid reservoir, to avoid carbon dioxide to be leaked in air, then, after the second temperature being detected continuous 5 seconds and remaining unchanged, close air-conditioning system.
The Air-condition system control method that the present embodiment provides, obtain after the first temperature and the second temperature, compare the first temperature and the second temperature, when the difference of the first temperature and preset value is greater than the second temperature, the carbon dioxide refrigerating medium of controlling in fluid reservoir enters the high-pressure carbon dioxide circulatory system, when the difference of the first temperature and preset value is less than or equal to the second temperature, the carbon dioxide refrigerating medium of controlling in fluid reservoir stops entering the high-pressure carbon dioxide circulatory system.Carbon dioxide liquid refrigerating medium enters after the high-pressure carbon dioxide circulatory system, from the first heat exchanger, absorb amount of heat, and in the second heat exchanger place release heat, thereby can obtain higher leaving air temp, solve the problem that available technology adopting carbon dioxide can only freeze and can not heat as the air-conditioning system of refrigerating medium.
In this description, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.For the disclosed device of embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part partly illustrates referring to method.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. an air-conditioning system, is characterized in that, comprising:
By the first heat exchanger, carry out the combustible refrigerant circulatory system and the high-pressure carbon dioxide circulatory system of exchange heat, the described high-pressure carbon dioxide circulatory system comprises fluid reservoir and the transmission pump being connected with described fluid reservoir and the second heat exchanger that is arranged on described the first heat exchanger outlet place and stores carbon dioxide refrigerating medium, wherein, described the first heat exchanger is provided with the first temperature sensing device, and described the second heat exchanger is provided with the second temperature sensing device;
The controller being connected with the second temperature sensing device with described the first temperature sensing device, for when described air-conditioning system heats, the first temperature of described the first heat exchanger and the second temperature of described the second heat exchanger that described the second temperature sensing device detects that relatively under synchronization, described the first temperature sensing device detects, and when the difference of described the first temperature and preset value is greater than the second temperature, the carbon dioxide refrigerating medium of controlling in described fluid reservoir enters the described high-pressure carbon dioxide circulatory system, when the difference of described the first temperature and preset value is less than or equal to the second temperature, the carbon dioxide refrigerating medium of controlling in described fluid reservoir stops entering the described high-pressure carbon dioxide circulatory system.
2. system according to claim 1, is characterized in that, described controller comprises:
Comparing unit, for more described the first temperature and the second temperature, and when the difference of described the first temperature and preset value is greater than described the second temperature, produce the first control signal and be sent to the first performance element, when the difference of described the first temperature and preset value is less than or equal to described the second temperature, produce the second control signal and be sent to the second performance element, wherein, described preset value is less than or equal to 5 ℃;
The first performance element, for receiving described the first control signal, and the carbon dioxide refrigerating medium of controlling in described fluid reservoir according to described the first control signal enters the described high-pressure carbon dioxide circulatory system;
The second performance element, for receiving described the second control signal, and the carbon dioxide refrigerating medium of controlling in described fluid reservoir according to described the second control signal stops entering the described high-pressure carbon dioxide circulatory system.
3. system according to claim 2, is characterized in that, the pressure of the described high-pressure carbon dioxide circulatory system for being more than or equal to 10MPa under 45 ℃ of conditions; On pipeline between described fluid reservoir and described the first heat exchanger, there is the first valve, in the inlet ductwork of described fluid reservoir, there is the second valve, on the export pipeline of described fluid reservoir, there is the 3rd valve.
4. system according to claim 3, is characterized in that, described the first performance element is by opening the second valve and the 3rd valve, closing the first valve, and the carbon dioxide refrigerating medium of controlling in described fluid reservoir enters the described high-pressure carbon dioxide circulatory system;
Described the second performance element is by closing the second valve and the 3rd valve, opening the first valve, and the carbon dioxide refrigerating medium of controlling in described fluid reservoir stops entering the described high-pressure carbon dioxide circulatory system.
5. system according to claim 4, is characterized in that, described controller also comprises:
Judging unit, for after the carbon dioxide refrigerating medium of fluid reservoir enters the described high-pressure carbon dioxide circulatory system, judge whether described the second temperature remains unchanged, the carbon dioxide refrigerating medium of if so, controlling in described fluid reservoir stops entering the described high-pressure carbon dioxide circulatory system.
6. a control method that is applied in the air-conditioning system described in claim 1-5 any one, is characterized in that, comprising:
Obtain the first temperature and the second temperature that synchronization detects;
When described air-conditioning system heats, the difference of more described the first temperature and preset value and the second temperature;
If the difference of described the first temperature and preset value is greater than described the second temperature, the carbon dioxide refrigerating medium of controlling in described fluid reservoir enters the described high-pressure carbon dioxide circulatory system;
If the difference of described the first temperature and preset value is less than or equal to described the second temperature, the carbon dioxide refrigerating medium of controlling in described fluid reservoir stops entering the described high-pressure carbon dioxide circulatory system.
7. method according to claim 6, is characterized in that, the process that the carbon dioxide refrigerating medium in the described fluid reservoir of described control enters the described high-pressure carbon dioxide circulatory system is:
Open the second valve and the 3rd valve, close the first valve, with the carbon dioxide refrigerating medium of controlling in described fluid reservoir, enter the described high-pressure carbon dioxide circulatory system.
8. method according to claim 6, is characterized in that, the process that the carbon dioxide refrigerating medium in the described fluid reservoir of described control stops entering the described high-pressure carbon dioxide circulatory system is:
Close the second valve and the 3rd valve, open the first valve, with the carbon dioxide refrigerating medium of controlling in described fluid reservoir, stop entering the described high-pressure carbon dioxide circulatory system.
9. according to the method described in claim 7 or 8, it is characterized in that, the carbon dioxide refrigerating medium in described fluid reservoir also comprises after entering the described high-pressure carbon dioxide circulatory system:
Judge whether described the second temperature remains unchanged, the carbon dioxide refrigerating medium of if so, controlling in described fluid reservoir stops entering the described high-pressure carbon dioxide circulatory system.
10. method according to claim 9, is characterized in that, before closing air-conditioning system, also comprises:
Open the second valve, close the first valve and the 3rd valve, so that the carbon dioxide refrigerating medium in the described high-pressure carbon dioxide circulatory system is converted to liquid and is stored in described fluid reservoir.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US10941955B2 (en) | 2017-10-27 | 2021-03-09 | Dometic Sweden Ab | Systems, methods, and apparatuses for providing communications between climate control devices in a recreational vehicle |
| US11254183B2 (en) | 2017-08-25 | 2022-02-22 | Dometic Sweden Ab | Recreational vehicle, cooling device, controlling system and method for controlling the cooling device |
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| CN1825008A (en) * | 2005-02-26 | 2006-08-30 | Lg电子株式会社 | Second-refrigerant pump driving type air conditioner |
| CN1837686A (en) * | 2005-03-24 | 2006-09-27 | 日立家用电器公司 | Heat-pump type heating apparatus |
| EP1850075A1 (en) * | 2006-04-25 | 2007-10-31 | Valeo Systèmes Thermiques | Air-conditioning circuit with supercritical cycle |
| CN201199103Y (en) * | 2008-04-25 | 2009-02-25 | 天津商业大学 | Carbon dioxide air cooling system |
| CN102422093A (en) * | 2009-05-12 | 2012-04-18 | 三菱电机株式会社 | Air conditioner |
| CN101968241A (en) * | 2010-09-30 | 2011-02-09 | 广东美的电器股份有限公司 | Air-conditioner using combustible refrigerant and control method thereof |
| CN103017412A (en) * | 2012-12-21 | 2013-04-03 | 天津大学 | Propane heat pump system employing carbon dioxide as secondary refrigerant |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11254183B2 (en) | 2017-08-25 | 2022-02-22 | Dometic Sweden Ab | Recreational vehicle, cooling device, controlling system and method for controlling the cooling device |
| US11919363B2 (en) | 2017-08-25 | 2024-03-05 | Dometic Sweden Ab | Recreational vehicle, cooling device, controlling system and method for controlling the cooling device |
| US10941955B2 (en) | 2017-10-27 | 2021-03-09 | Dometic Sweden Ab | Systems, methods, and apparatuses for providing communications between climate control devices in a recreational vehicle |
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| CN104110740B (en) | 2017-01-11 |
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