CN104110740B - Air conditioning system and control method thereof - Google Patents
Air conditioning system and control method thereof Download PDFInfo
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- CN104110740B CN104110740B CN201410359869.5A CN201410359869A CN104110740B CN 104110740 B CN104110740 B CN 104110740B CN 201410359869 A CN201410359869 A CN 201410359869A CN 104110740 B CN104110740 B CN 104110740B
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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, it relates to a kind of air conditioning system and control method thereof.
Background technology
Carbon dioxide coolant is commonly called R744 cold-producing medium, have nontoxic, density is little, non-combustible, the most combustion-supporting, chemical
The advantages such as stable in properties, leak out from air conditioning system although there may be some carbon dioxides during refrigeration
Go, but, environment can't be caused too much influence by these carbon dioxides.
Owing to carbon dioxide latent heat is very big, heat exchange property is the best, and viscosity is little, and operating pressure is big, the pressure drop pair of flowing
The impact that circulation produces is the least, therefore, uses carbon dioxide to have become as the main development side of air conditioning system as refrigerating medium
To.
Existing air conditioning system, is all to use normal pressure or low pressure CO 2 gas as refrigerating medium, therefore, can only obtain
The low leaving air temp of less than 0 DEG C during air conditioner refrigerating, when can not obtain air-conditioning heating, the high leaving air temp of more than 30 DEG C, the most existing
Use carbon dioxide can only freeze can not heat as the air conditioning system of refrigerating medium, therefore, significantly limit carbon dioxide and carry
Cryogen application within air-conditioning systems.
Summary of the invention
In view of this, the invention provides a kind of air conditioning system and control method thereof, to solve prior art uses two
Carbonoxide can only freeze the problem that can not heat as the air conditioning system of refrigerating medium.
For achieving the above object, the present invention provides following technical scheme:
A kind of air conditioning system, including:
Combustible refrigerant blood circulation and the high-pressure carbon dioxide cyclic system of heat exchange is carried out by the first heat exchanger
System, described high-pressure carbon dioxide blood circulation includes being arranged at described first heat exchanger outlet and storage has carbon dioxide to carry
The fluid reservoir of cryogen and the transmission pump being connected with described fluid reservoir and the second heat exchanger, wherein, described first heat exchanger
Being provided with the first temperature sensing device, described second heat exchanger is provided with the second temperature sensing device；
The controller being connected with described first temperature sensing device and the second temperature sensing device, for heating in described air conditioning system
Time, compare first temperature and described second of described first heat exchanger that described first temperature sensing device under synchronization detects
Second temperature of described second heat exchanger that temperature sensing device detects, and in the difference of described first temperature and preset value more than the
During two temperature, control the carbon dioxide refrigerating medium in described fluid reservoir and enter described high-pressure carbon dioxide blood circulation, described
When the difference of the first temperature and preset value is less than or equal to the second temperature, control carbon dioxide refrigerating medium two stopping in described fluid reservoir
Enter described high-pressure carbon dioxide blood circulation.
Preferably, described controller includes:
Comparing unit, for relatively described first temperature and the second temperature, and in the difference of described first temperature Yu preset value
During more than described second temperature, produce the first control signal and send to the first performance element, in described first temperature with default
When the difference of value is less than or equal to described second temperature, produces the second control signal and send to the second performance element, wherein, described pre-
If value is less than or equal to 5 DEG C；
First performance element, is used for receiving described first control signal, and controls described according to described first control signal
Carbon dioxide refrigerating medium in fluid reservoir enters described high-pressure carbon dioxide blood circulation；
Second performance element, is used for receiving described second control signal, and controls described according to described second control signal
Carbon dioxide refrigerating medium in fluid reservoir stops entering described high-pressure carbon dioxide blood circulation.
Preferably, the pressure of described high-pressure carbon dioxide blood circulation is more than or equal to 10MPa under the conditions of 45 DEG C, and institute
Stating the carbon dioxide refrigerating medium in fluid reservoir is carbon dioxide liquid；Pipe between described fluid reservoir and described first heat exchanger
There is on road the first valve, the inlet ductwork of described fluid reservoir has the second valve, the export pipeline of described fluid reservoir has
There is the 3rd valve.
Preferably, described first performance element, by opening the second valve and the 3rd valve, closing the first valve, controls institute
State the carbon dioxide refrigerating medium in fluid reservoir and enter described high-pressure carbon dioxide blood circulation；
Described second performance element, by closing the second valve and the 3rd valve, opening the first valve, controls described liquid storage
Carbon dioxide refrigerating medium in tank stops entering described high-pressure carbon dioxide blood circulation.
Preferably, described controller also includes:
Judging unit, in fluid reservoir carbon dioxide refrigerating medium enter described high-pressure carbon dioxide blood circulation it
After, it is judged that whether described second temperature keeps constant, the most then control the carbon dioxide refrigerating medium in described fluid reservoir stop into
Enter described high-pressure carbon dioxide blood circulation.
A kind of control method applying as above air conditioning system described in any one, including:
Obtain the first temperature and the second temperature that synchronization detects；
When described air conditioning system heats, compare described first temperature and the difference of preset value and the second temperature；
If described first temperature is more than described second temperature with the difference of preset value, then control the titanium dioxide in described fluid reservoir
Carbon refrigerating medium enters described high-pressure carbon dioxide blood circulation；
If described first temperature is less than or equal to described second temperature with the difference of preset value, then control two in described fluid reservoir
Carbonoxide refrigerating medium stops entering described high-pressure carbon dioxide blood circulation.
Preferably, the carbon dioxide refrigerating medium in the described fluid reservoir of described control enters described high-pressure carbon dioxide cyclic system
The process of system is:
Open the second valve and the 3rd valve, close the first valve, to control the carbon dioxide refrigerating in described fluid reservoir
Agent enters described high-pressure carbon dioxide blood circulation.
Preferably, the described high-pressure carbon dioxide of the stopping of the carbon dioxide refrigerating medium in the described fluid reservoir of described control entrance follows
The process of loop systems is:
Close the second valve and the 3rd valve, open the first valve, to control the carbon dioxide refrigerating in described fluid reservoir
Agent stops entering described high-pressure carbon dioxide blood circulation.
Preferably, after the carbon dioxide refrigerating medium in described fluid reservoir enters described high-pressure carbon dioxide blood circulation,
Also include:
Judge whether described second temperature keeps constant, the most then control the carbon dioxide refrigerating medium in described fluid reservoir
Stop entering described high-pressure carbon dioxide blood circulation.
Preferably, before closing air conditioning system, also include:
Open the second valve, close the first valve and the 3rd valve, with by described high-pressure carbon dioxide blood circulation
Carbon dioxide refrigerating medium is converted to liquid and is stored in described fluid reservoir.
Compared with prior art, technical scheme provided by the present invention has the advantage that
Air conditioning system that the present invention provides and control method thereof, detect the first temperature by the first temperature sensing device, by the
Two temperature sensing devices detect the second temperature, and when the difference of the first temperature with preset value is more than the second temperature, control in fluid reservoir
Carbon dioxide refrigerating medium enters high-pressure carbon dioxide blood circulation, and the difference in the first temperature with preset value is less than or equal to the second temperature
Time, control the carbon dioxide refrigerating medium in fluid reservoir and stop entering high-pressure carbon dioxide blood circulation, therefore, when in fluid reservoir
When carbon dioxide refrigerating medium is carbon dioxide liquid, after it enters high-pressure carbon dioxide blood circulation, at the first heat exchanger
Absorb amount of heat, and at the second heat exchanger, discharge heat, it is hereby achieved that higher leaving air temp, solve existing
Technology use carbon dioxide can only freeze the problem that can not heat as the air conditioning system of refrigerating medium.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to
The accompanying drawing provided obtains other accompanying drawing.
The air conditioning system structure chart that Fig. 1 provides for one embodiment of the present of invention；
The controller architecture schematic diagram of the air conditioning system that Fig. 2 provides for the present invention；
The air conditioner system control method flow chart that Fig. 3 provides for another embodiment of the present invention.
Detailed description of the invention
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 carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
An embodiment provides a kind of air conditioning system, as it is shown in figure 1, include combustible refrigerant blood circulation
1 and high-pressure carbon dioxide blood circulation 2, the refrigerant line of the two blood circulation or refrigerating medium pipeline by the first heat exchange
Device 00 carries out the exchange of heat, and wherein, combustible refrigerant blood circulation 1 includes that compressor 10, four-way change-over valve the 11, the 3rd heat is handed over
Parallel operation 12 and choke valve 13, high-pressure carbon dioxide blood circulation 2 includes being arranged on the first heat exchanger 00 refrigerating medium exit
Fluid reservoir 21, the transmission pump 22 being connected with fluid reservoir 21 and the second heat exchanger 23, wherein, on the first heat exchanger 00 or refrigeration
Agent pipe exit has the first temperature sensing device 01 of detection the first temperature T1, the i.e. first temperature sensor, the second heat exchanger 23
In have detection the second temperature T2 the second temperature sensing device 24, the i.e. second temperature sensor.
In the present embodiment, the first cold-producing medium in combustible refrigerant blood circulation 1 is combustible refrigerant, such as R290 or R32
Deng, the carbon dioxide refrigerating medium in high-pressure carbon dioxide blood circulation 2 is pressurized liquid carbon dioxide, and i.e. fluid reservoir 21 is internal deposits
The carbon dioxide refrigerating medium of storage is carbon dioxide liquid.Owing to carbon dioxide refrigerating medium is high-pressure carbon dioxide, therefore, high pressure two
The pressure of carbonoxide blood circulation is the highest, and especially under conditions of 45 DEG C, the pressure of high-pressure carbon dioxide blood circulation is more than
Equal to 45MPa.
The air conditioning system that the present embodiment provides also includes: the control being connected with the first temperature sensing device 01 and the second temperature sensing device 24
Device 3 processed.After first temperature sensing device 01 and the second temperature sensing device 24 detect the first temperature T1 and the second temperature T2, by synchronization
Under the first temperature T1 of detecting and the second temperature T2 send to controller 3, controller 3 receives the first temperature T1 and the second temperature
After degree T2, compare the first temperature T1 and the second temperature T2, and in the difference of the first temperature T1 and preset value T0 more than the second temperature T2
Time, control the carbon dioxide refrigerating medium in fluid reservoir 21, i.e. carbon dioxide coolant, enter high-pressure carbon dioxide blood circulation 2,
At the first heat exchanger 00, absorb amount of heat, and at the second heat exchanger 23, discharge heat, when heating with generation relatively
High leaving air temp；When the difference of the first temperature T1 with preset value T0 is less than or equal to the second temperature T2, illustrate that high-pressure carbon dioxide follows
The content of the carbon dioxide in loop systems 2 has met design requirement, and therefore, controller 3 is by fluid reservoir 21 and high pressure titanium dioxide
Carbon cycle system 2 disconnects, and i.e. controls the carbon dioxide refrigerating medium in fluid reservoir 21, i.e. carbon dioxide coolant, stops entering height
Pressure carbon dioxide cycle system 2.
Wherein, as in figure 2 it is shown, controller 3 includes comparing unit the 31, first performance element 32 and the second performance element 33,
Specifically, comparing unit 31 is used for comparing the first temperature T1 and the second temperature T2, and in the difference of the first temperature T1 Yu preset value T0
During more than the second temperature T2, produce the first control signal and send to the first performance element 32, at the first temperature T1 and preset value
When the difference of T0 is less than or equal to the second temperature T2, produces the second control signal and send to the second performance element 33；First performs list
Unit 32 is for receiving the first control signal, and controls the carbon dioxide refrigerating medium entrance in fluid reservoir 21 according to the first control signal
High-pressure carbon dioxide blood circulation 2；Second performance element 33 is used for receiving the second control signal, and according to the second control signal control
Carbon dioxide refrigerating medium in fluid reservoir 21 processed stops entering high-pressure carbon dioxide blood circulation 2.
Additionally, controller 3 also includes judging unit, enter high pressure two for the carbon dioxide refrigerating medium in fluid reservoir 21
After carbonoxide blood circulation 2, it is judged that whether the second temperature T2 keeps constant, the most then control the titanium dioxide in fluid reservoir 21
Carbon refrigerating medium stops entering high-pressure carbon dioxide blood circulation 2.
In the present embodiment, as it is shown in figure 1, fluid reservoir 21 is arranged in parallel in the exit of the first heat exchanger 00, and, storage
On pipeline between flow container 21 and the first heat exchanger 00, there is the first valve 10, the inlet ductwork of fluid reservoir 21 has second
Valve 20, the export pipeline of fluid reservoir 21 has the 3rd valve 30, wherein, the horizontal position of the inlet pipe mouth of pipe within fluid reservoir 21
Set high in the horizontal level going out the pipe mouth of pipe.
Based on this, the first performance element 32 can be by opening the second valve 20 and the 3rd valve 30, closing the first valve
10, open fluid reservoir 21, thus control the carbon dioxide refrigerating medium in fluid reservoir 21 and enter high-pressure carbon dioxide blood circulation 2；
Second performance element 33 can disconnect fluid reservoir 21 by closing the second valve 20 and the 3rd valve 30, opening the first valve 10
With the connection of high-pressure carbon dioxide blood circulation 2, i.e. control the carbon dioxide refrigerating medium in fluid reservoir 21 and stop entering high pressure two
Carbonoxide blood circulation 2.
The present embodiment is by judging that first temperature difference with preset value T0, whether more than the second temperature, decides whether order
Carbon dioxide refrigerating medium entrance high-pressure carbon dioxide blood circulation in fluid reservoir, and in other embodiments, it is possible to first
The manner of comparison of temperature and the second temperature adjusts accordingly, such as, when the difference of the first temperature with the first preset value is more than second
During temperature, control carbon dioxide refrigerating medium and enter high-pressure carbon dioxide blood circulation, or, when the first temperature and the second preset value
Difference less than the second temperature time, control carbon dioxide refrigerating medium stop enter high-pressure carbon dioxide blood circulation, wherein, first is pre-
If 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
Generally less than 5 DEG C.
The air conditioning system that the present embodiment provides, the 3rd heat exchanger can be the heat exchanger being disposed in the outdoor, the second heat
Exchanger can be the heat exchanger being disposed in the interior.After carbon dioxide liquid refrigerating medium enters high-pressure carbon dioxide blood circulation,
At the first heat exchanger absorb amount of heat, and at the second heat exchanger discharge heat, and the first heat exchanger be from
The heat of outdoor absorption, say, that the air conditioning system that the present embodiment provides, by pressurized liquid carbon dioxide refrigerating medium, will
Outdoor heat is converted to the heat of indoor.
It is to say, the air conditioning system that the present embodiment provides, detect the first temperature by the first temperature sensing device, by second
Temperature sensing device detects the second temperature, and when the difference of the first temperature with preset value is more than the second temperature, controls two in fluid reservoir
Carbonoxide refrigerating medium enters high-pressure carbon dioxide blood circulation, and the difference in the first temperature with preset value is less than or equal to the second temperature
Time, control the carbon dioxide refrigerating medium in fluid reservoir and stop entering high-pressure carbon dioxide blood circulation, it is hereby achieved that higher
Leaving air temp, solve and prior art use carbon dioxide can only freeze as the air conditioning system of refrigerating medium can not to heat
Problem.
An alternative embodiment of the invention provides a kind of monitoring method of air conditioning system, and being applied to above-described embodiment provides
Air conditioning system, the structural representation of this air conditioning system as it is shown in figure 1, include by the first heat exchanger carry out heat exchange can
Combustion refrigerant-cycle systems and high-pressure carbon dioxide blood circulation, high-pressure carbon dioxide blood circulation includes fluid reservoir, transmission pump
With the second heat exchanger, the first heat exchanger has the first temperature sensing device, and the second heat exchanger has the second temperature sensing device, and
The controller being connected with the first temperature sensing device and the second temperature sensing device.
Based on this, the control method flow chart that the present embodiment provides is as it is shown on figure 3, include:
S301: obtain the first temperature and the second temperature that synchronization detects；
Air conditioning system powers on, and opens heating mode, and after running about 3 minutes, the first temperature sensing device and the second temperature sensing device are opened
Beginning continuous detecting the first temperature and the second temperature, and the first temperature detected under synchronization and the second temperature are sent to control
Device processed.
S302: when described air conditioning system heats, relatively described first temperature and the difference of preset value and the second temperature；
S303: if the difference of described first temperature and preset value is more than described second temperature, then control in described fluid reservoir
Carbon dioxide refrigerating medium enters described high-pressure carbon dioxide blood circulation；
After controller receives and obtains the first temperature and the second temperature detected, relatively described first temperature and the second temperature
Degree, if the difference of described first temperature and preset value is this comparative result, then more than in described second temperature, and continuous 1 minute
Controlling the carbon dioxide refrigerating medium in described fluid reservoir and enter high-pressure carbon dioxide blood circulation, wherein, described preset value does not surpasses
Cross 5 DEG C.
Wherein, control the carbon dioxide refrigerating medium in described fluid reservoir and enter the mistake of described high-pressure carbon dioxide blood circulation
Cheng Wei: open the second valve and the 3rd valve, close the first valve, enters controlling the carbon dioxide refrigerating medium in described fluid reservoir
Enter described high-pressure carbon dioxide blood circulation.
In other embodiments of the invention, the manner of comparison of the first temperature and the second temperature can be adjusted, example
As, when the difference of the first temperature with the first preset value is more than the second temperature, then controls carbon dioxide refrigerating medium and enter high pressure dioxy
Changing Carbon cycle system, the first numerical value can be set according to actual needs, is usually no more than 5 DEG C.
In the present embodiment, in fluid reservoir, the carbon dioxide refrigerating medium of storage is pressurized liquid carbon dioxide refrigerating medium, therefore,
After opening the second valve and the 3rd valve, closing the first valve, the carbon dioxide in fluid reservoir enters high-pressure carbon dioxide and follows
Loop systems, absorbs amount of heat at the first heat exchanger, and discharges heat at the second heat exchanger, it is achieved thereby that higher
The output of leaving air temp.
Fluid reservoir is opened, after carbon dioxide enters high-pressure carbon dioxide blood circulation, and the first temperature sensing device and the second sense
Temperature device the most persistently detects the first temperature and the second temperature, persistently carry out obtaining the first temperature detected and the second temperature and
Relatively described first temperature and the process of the second temperature, when the difference of the first temperature with preset value is less than or equal to the second temperature, enters
Enter step S304；Or, it is judged that whether the second temperature keeps constant, and the second temperature all keeps if so, and in continuous 1 minutes
Constant, then control the carbon dioxide refrigerating medium in described fluid reservoir and stop entering described high-pressure carbon dioxide blood circulation.
S304: if the difference of described first temperature and preset value is less than or equal to described second temperature, then control described fluid reservoir
In carbon dioxide refrigerating medium stop enter described high-pressure carbon dioxide blood circulation.
When the difference of the first temperature detected with preset value is less than or equal to the second temperature, illustrate that high-pressure carbon dioxide circulates
The content of the carbon dioxide in system has met the requirements, if in continuous 1 minute, the first temperature is respectively less than with the difference of preset value
Equal to the second temperature, then control the carbon dioxide refrigerating medium in fluid reservoir and stop entering high-pressure carbon dioxide blood circulation.
Detailed process is: closes the second valve and the 3rd valve, open the first valve, to control the titanium dioxide in fluid reservoir
Carbon refrigerating medium stops entering high-pressure carbon dioxide blood circulation.After closing the second valve and the 3rd valve, opening the first valve,
Fluid reservoir is disconnected with the connection of high-pressure carbon dioxide blood circulation pipeline, and the carbon dioxide refrigerating medium in fluid reservoir can not enter
Enter high-pressure carbon dioxide blood circulation.
Equally, in other embodiments of the invention, warm less than or equal to second with the difference of the second preset value when the first temperature
When spending, then controlling carbon dioxide refrigerating medium and stop entering high-pressure carbon dioxide blood circulation, wherein, second value is also dependent on reality
Border needs to preset, and second value is more than the first numerical value.
In the present embodiment, when using carbon dioxide refrigerating medium to carry out shutdown under the pattern heated, need first by each heat
The inner blower that exchanger is corresponding shuts down, and then by four-way change-over valve break-in, i.e. switches to refrigeration mode, is then turned on second
Valve, close the first valve and the 3rd valve, to be turned by the carbon dioxide refrigerating medium in described high-pressure carbon dioxide blood circulation
It is changed to liquid and is stored in described fluid reservoir, to avoid carbon dioxide to be leaked in air, within the most continuous 5 seconds, detecting
After two temperature holdings are constant, close air conditioning system.
The air conditioner system control method that the present embodiment provides, after obtaining the first temperature and the second temperature, compares the first temperature
With the second temperature, when the difference of the first temperature with preset value is more than the second temperature, control the carbon dioxide refrigerating medium in fluid reservoir
Enter high-pressure carbon dioxide blood circulation, when the difference of the first temperature with preset value is less than or equal to the second temperature, control fluid reservoir
In carbon dioxide refrigerating medium stop enter high-pressure carbon dioxide blood circulation.Carbon dioxide liquid refrigerating medium enters high pressure titanium dioxide
After Carbon cycle system, at the first heat exchanger, absorb amount of heat, and at the second heat exchanger, discharge heat, such that it is able to
Obtain higher leaving air temp, solve and prior art uses carbon dioxide can only freeze not as the air conditioning system of refrigerating medium
The problem that can heat.
In this specification, each embodiment uses the mode gone forward one by one to describe, and what each embodiment stressed is and other
The difference of embodiment, between each embodiment, identical similar portion sees mutually.For device disclosed in embodiment
For, owing to it corresponds to the method disclosed in Example, so describe is fairly simple, relevant part sees method part and says
Bright.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one
The widest scope caused.
Claims (10)
1. an air conditioning system, it is characterised in that including:
Combustible refrigerant blood circulation and the high-pressure carbon dioxide blood circulation of heat exchange, institute is carried out by the first heat exchanger
State high-pressure carbon dioxide blood circulation to include being arranged at described first heat exchanger outlet and storage has carbon dioxide refrigerating medium
Fluid reservoir and the transmission pump being connected with described fluid reservoir and the second heat exchanger, wherein, described first heat exchanger is arranged
The first temperature sensing device, described second heat exchanger is had to be provided with the second temperature sensing device；
The controller being connected with described first temperature sensing device and the second temperature sensing device, is used for when described air conditioning system heats, than
First temperature of described first heat exchanger that described first temperature sensing device detects and described second temperature-sensitive under relatively synchronization
Second temperature of described second heat exchanger that device detects, and warm more than second with the difference of preset value in described first temperature
When spending, control the carbon dioxide refrigerating medium in described fluid reservoir and enter described high-pressure carbon dioxide blood circulation, described first
When the difference of temperature and preset value is less than or equal to the second temperature, controls the carbon dioxide refrigerating medium in described fluid reservoir and stop entering institute
State high-pressure carbon dioxide blood circulation.
System the most according to claim 1, it is characterised in that described controller includes:
Comparing unit, for relatively described first temperature and the second temperature, and is more than in the difference of described first temperature with preset value
During described second temperature, produce the first control signal and send to the first performance element, at described first temperature and preset value
When difference is less than or equal to described second temperature, produces the second control signal and send to the second performance element, wherein, described preset value
Less than or equal to 5 DEG C；
First performance element, is used for receiving described first control signal, and controls described liquid storage according to described first control signal
Carbon dioxide refrigerating medium in tank enters described high-pressure carbon dioxide blood circulation；
Second performance element, is used for receiving described second control signal, and controls described liquid storage according to described second control signal
Carbon dioxide refrigerating medium in tank stops entering described high-pressure carbon dioxide blood circulation.
System the most according to claim 2, it is characterised in that the pressure of described high-pressure carbon dioxide blood circulation is 45
More than or equal to 10MPa under the conditions of DEG C；There is on pipeline between described fluid reservoir and described first heat exchanger the first valve, institute
State and there is in the inlet ductwork of fluid reservoir the second valve, the export pipeline of described fluid reservoir has the 3rd valve.
System the most according to claim 3, it is characterised in that described first performance element is by opening the second valve and
Three valves, close the first valve, control the carbon dioxide refrigerating medium in described fluid reservoir and enter the circulation of described high-pressure carbon dioxide
System；
Described second performance element, by closing the second valve and the 3rd valve, opening the first valve, controls in described fluid reservoir
Carbon dioxide refrigerating medium stop enter described high-pressure carbon dioxide blood circulation.
System the most according to claim 4, it is characterised in that described controller also includes:
Judging unit, after the carbon dioxide refrigerating medium in fluid reservoir enters described high-pressure carbon dioxide blood circulation,
Judge whether described second temperature keeps constant, the most then control the carbon dioxide refrigerating medium in described fluid reservoir and stop entering
Described high-pressure carbon dioxide blood circulation.
6. apply the control method in the air conditioning system described in any one of claim 1-5 for one kind, it is characterised in that including:
Obtain the first temperature and the second temperature that synchronization detects；
When described air conditioning system heats, compare described first temperature and the difference of preset value and the second temperature；
If described first temperature is more than described second temperature with the difference of preset value, then controls the carbon dioxide in described fluid reservoir and carry
Cryogen enters described high-pressure carbon dioxide blood circulation；
If described first temperature is less than or equal to described second temperature with the difference of preset value, then control the titanium dioxide in described fluid reservoir
Carbon refrigerating medium stops entering described high-pressure carbon dioxide blood circulation.
Method the most according to claim 6, it is characterised in that the carbon dioxide refrigerating medium in the described fluid reservoir of described control
The process entering described high-pressure carbon dioxide blood circulation is:
Open the second valve and the 3rd valve, close the first valve, enter controlling the carbon dioxide refrigerating medium in described fluid reservoir
Enter described high-pressure carbon dioxide blood circulation.
Method the most according to claim 6, it is characterised in that the carbon dioxide refrigerating medium in the described fluid reservoir of described control
The process stopping entering described high-pressure carbon dioxide blood circulation is:
Close the second valve and the 3rd valve, open the first valve, stop controlling the carbon dioxide refrigerating medium in described fluid reservoir
Only enter described high-pressure carbon dioxide blood circulation.
9. according to the method described in claim 7 or 8, it is characterised in that the carbon dioxide refrigerating medium in described fluid reservoir enters
After described high-pressure carbon dioxide blood circulation, also include:
Judge whether described second temperature keeps constant, the most then control the carbon dioxide refrigerating medium in described fluid reservoir and stop
Enter described high-pressure carbon dioxide blood circulation.
Method the most according to claim 9, it is characterised in that before closing air conditioning system, also include:
Open the second valve, close the first valve and the 3rd valve, with by the dioxy in described high-pressure carbon dioxide blood circulation
Change carbon refrigerating medium be converted to liquid and be stored in described fluid reservoir.
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| CN201410359869.5A CN104110740B (en) | 2014-07-25 | 2014-07-25 | Air conditioning system and control method thereof |
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| CN201410359869.5A CN104110740B (en) | 2014-07-25 | 2014-07-25 | Air conditioning system and control method thereof |
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| DE102017214941A1 (en) | 2017-08-25 | 2019-02-28 | Dometic Sweden Ab | Recreational vehicle, cooling device, control system and method of 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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| CN201199103Y (en) * | 2008-04-25 | 2009-02-25 | 天津商业大学 | Carbon dioxide air cooling system |
| 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 |
| CN102422093A (en) * | 2009-05-12 | 2012-04-18 | 三菱电机株式会社 | Air conditioner |
| CN103017412A (en) * | 2012-12-21 | 2013-04-03 | 天津大学 | Propane heat pump system employing carbon dioxide as secondary refrigerant |
-
2014
- 2014-07-25 CN CN201410359869.5A patent/CN104110740B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN104110740A (en) | 2014-10-22 |
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