CN103939999A - Double-refrigerant air conditioner system and control method thereof - Google Patents

Double-refrigerant air conditioner system and control method thereof Download PDF

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Publication number
CN103939999A
CN103939999A CN201410153813.4A CN201410153813A CN103939999A CN 103939999 A CN103939999 A CN 103939999A CN 201410153813 A CN201410153813 A CN 201410153813A CN 103939999 A CN103939999 A CN 103939999A
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China
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branch road
refrigerant
mode
pair
air conditioners
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CN201410153813.4A
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CN103939999B (en
Inventor
游斌
刘智勇
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GD Midea Air Conditioning Equipment Co Ltd
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Guangdong Midea Refrigeration Equipment Co Ltd
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Abstract

The invention discloses a double-refrigerant air conditioner system and a control method of the double-refrigerant air conditioner system. The double-refrigerant air conditioner system comprises a controller, an indoor unit and an outdoor unit. The indoor unit and the outdoor unit are connected through pipelines to form a circulation loop. The double-refrigerant air conditioner system further comprises a first branch used for storing a first refrigerant, and a second branch used for storing a second refrigerant, wherein the first branch is connected to the circulation loop in series after being connected with the second branch in parallel. The controller controls the first branch and the second branch to be opened and closed according to the work mode of the double-refrigerant air conditioner system, and therefore the first refrigerant or the second refrigerant can flow in the circulation loop in a circulating mode. According to the double-refrigerant air conditioner system and the control method of the double-refrigerant air conditioner system, the air conditioner system can better have multiple work modes at the same time in the same pipeline, and the energy efficiency ratio of the air conditioner system is increased.

Description

One pair of coolant air conditioners system and control method thereof
Technical field
The present invention relates to air-conditioning technical field, relate in particular to a kind of one pair of coolant air conditioners system and control method thereof.
Background technology
At present, in general air-conditioning system, only have a kind of refrigerant, by the switching of cross valve, realized the various mode of operations of air-conditioning system by same refrigerant, such as refrigeration mode, heating mode and dehumidification mode etc.
The refrigerant of air-conditioning system is generally formed according to certain ratio proportioning by ammonia, fluorine Lyons class, water and hydrocarbon etc., above-mentioned each component is carried out to proportioning according to different ratios, the characteristic of the refrigerant obtaining is not identical yet, for example, by the configuration suitable to refrigerant component, the characteristic that can realize a kind of refrigerant is more conducive to refrigeration or dehumidifying, and the characteristic of another kind of refrigerant is more conducive to heat.
The defect of existing air-conditioning system is, only realizes multiple mode of operations of air-conditioning system by a kind of refrigerant, and because optimal refrigerant proportioning required under different working modes is not identical yet, therefore existing air-conditioning system is difficult to preferably realize multiple-working mode simultaneously.
Foregoing only, for auxiliary understanding technical scheme of the present invention, does not represent and admits that foregoing is prior art.
Summary of the invention
Main purpose of the present invention is to provide a kind of one pair of coolant air conditioners system and control method thereof with identical inventive concept, is intended to make air-conditioning system can preferably realize multiple-working mode simultaneously.
To achieve these goals, one pair of coolant air conditioners system provided by the invention, comprise controller, indoor set and off-premises station, described indoor set and described off-premises station are connected to form a closed circuit by pipeline, described one pair of coolant air conditioners system also comprises the first branch road for storing the first refrigerant and for storing the second branch road of the second refrigerant, after described the first branch road and described the second branch circuit parallel connection, is series in described closed circuit; Described controller opens or closes according to the first branch road described in the mode of operation control of described one pair of coolant air conditioners system and the second branch road, thereby controls described the first refrigerant or the second refrigerant circulates in described closed circuit.
Preferably, described the first branch road comprises the first refrigerant storage tank, is located at the first entrance control valve of described the first refrigerant storage tank arrival end and is located at the first discharge control valve of the described first refrigerant storage tank port of export; Described the second branch road comprises the second refrigerant storage tank, be located at the second entrance control valve of described the second refrigerant storage tank arrival end and be located at the second discharge control valve of the described second refrigerant storage tank port of export; Described controller opens or closes according to the first entrance control valve, the first discharge control valve, the second entrance control valve and/or the second discharge control valve described in the mode of operation control of described one pair of coolant air conditioners system.
Preferably, described the first branch road and the second branch road are located at the port of export place of the compressor of described off-premises station.
Preferably, the arrival end place of described the first branch road and the second branch road is provided with for the refrigerant of described closed circuit being collected into the air pump device in described the first branch road and the second branch road.
Preferably, described the first entrance control valve, the first discharge control valve, the second entrance control valve and/or the second discharge control valve are check valve.
The present invention further proposes a kind of control method of one pair of coolant air conditioners system, comprises the following steps:
The target mode of operation of switching is obtained in the refrigerant switching controls order of sending according to user;
In the time that described target pattern is the first mode of operation, after controlling in described the second refrigerant recovering to the second branch road, close described the second branch road and open the first branch road, control in the closed circuit that described the first refrigerant enters one pair of coolant air conditioners system and carry out heat exchange circulation;
In the time that described target pattern is the second mode of operation, after controlling in described the first refrigerant recovering to the first branch road, close described the first branch road and open the second branch road, control in the closed circuit that described the second refrigerant enters one pair of coolant air conditioners system and carry out heat exchange circulation.
Preferably, in the time that described target pattern is the second mode of operation, after controlling in described the first refrigerant recovering to the first branch road, close described the first branch road and open the second branch road, controlling the step of carrying out heat exchange circulation in the closed circuit that described the second refrigerant enters one pair of coolant air conditioners system and specifically comprise:
When described target pattern is the second mode of operation, and when the residing environment temperature of described off-premises station is less than or equal to the first preset temperature, after controlling in described the first refrigerant recovering to the first branch road, close described the first branch road and open the second branch road, controlling in the closed circuit that described the second refrigerant enters one pair of coolant air conditioners system and carry out heat exchange circulation.
Preferably, in the time that described target pattern is the second mode of operation, after controlling in described the first refrigerant recovering to the first branch road, close described the first branch road and open the second branch road, controlling the step of carrying out heat exchange circulation in the closed circuit that described the second refrigerant enters one pair of coolant air conditioners system and specifically comprise:
When described target pattern is that number of times that the second mode of operation, the residing environment temperature of described off-premises station are greater than the first preset temperature and receive the order of described refrigerant switching controls is while being more than or equal to the first preset number of times, after controlling in described the first refrigerant recovering to the first branch road, close described the first branch road and open the second branch road, controlling in the closed circuit that described the second refrigerant enters one pair of coolant air conditioners system and carry out heat exchange circulation.
Preferably, in the time that described target pattern is the first mode of operation, after controlling in described the second refrigerant recovering to the second branch road, close described the second branch road and open the first branch road, controlling the step of carrying out heat exchange circulation in the closed circuit that described the first refrigerant enters one pair of coolant air conditioners system and specifically comprise:
When described target pattern is the first mode of operation, and when the residing environment temperature of described off-premises station is more than or equal to the second preset temperature, after controlling in described the second refrigerant recovering to the second branch road, close described the second branch road and open the first branch road, controlling in the closed circuit that described the first refrigerant enters one pair of coolant air conditioners system and carry out heat exchange circulation.
Preferably, it is described in the time that described target pattern is the first mode of operation, after controlling in described the second refrigerant recovering to the second branch road, close described the second branch road and open the first branch road, controlling the step of carrying out heat exchange circulation in the closed circuit that described the first refrigerant enters one pair of coolant air conditioners system and specifically comprise:
When described target pattern is that the first mode of operation, the residing environment temperature of described off-premises station are less than the second preset temperature, and when the number of times of receiving the order of described refrigerant switching controls is more than or equal to the second preset number of times, after controlling in described the second refrigerant recovering to the second branch road, close described the second branch road and open the first branch road, controlling in the closed circuit that described the first refrigerant enters one pair of coolant air conditioners system and carry out heat exchange circulation.
One pair of coolant air conditioners system provided by the invention is by being provided for storing the first branch road of the first refrigerant and for storing the second branch road of the second refrigerant, after the first branch road and the second branch circuit parallel connection, be series in above-mentioned closed circuit, controller opens and closes according to the corresponding branch road of the mode of operation control of one pair of coolant air conditioners system, in the time need to carrying out the switching between different working modes, according to the corresponding refrigerant recovering of switching controls instruction control to after in respective branch, again another kind of refrigerant is released in closed circuit, and then control is more suitable for circulating in closed circuit in the refrigerant of above-mentioned default mode of operation accordingly, thereby make air-conditioning system can in same pipeline, preferably realize multiple-working mode simultaneously, improve the Energy Efficiency Ratio of air-conditioning system.
Brief description of the drawings
Fig. 1 is the structural representation of one pair of coolant air conditioners system of the present invention in the time of the first mode of operation;
Fig. 2 is the structural representation of one pair of coolant air conditioners system of the present invention in the time of the second mode of operation;
Fig. 3 is the schematic flow sheet of one pair of coolant air conditioners system control method the first embodiment of the present invention;
Fig. 4 is the schematic flow sheet of one pair of coolant air conditioners system control method the second embodiment of the present invention;
Fig. 5 is the schematic flow sheet of one pair of coolant air conditioners system control method the 3rd embodiment of the present invention.
Realization, functional characteristics and the advantage of the object of the invention, in connection with embodiment, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
See figures.1.and.2, Fig. 1 is the structural representation of one pair of coolant air conditioners system of the present invention in the time of the first mode of operation, and Fig. 2 is the structural representation of one pair of coolant air conditioners system of the present invention in the time of the second mode of operation.
In this preferred embodiment, one pair of coolant air conditioners system comprises controller (not indicating in figure), indoor set 10 and off-premises station 20, indoor set 10 and off-premises station 20 are connected to form a closed circuit by pipeline, one pair of coolant air conditioners system also comprises the first branch road 21 for storing the first refrigerant and is series in above-mentioned closed circuit after in parallel with the second branch road 22 for storing the second branch road 12, the first branch roads 21 of the second refrigerant; Controller opens or closes according to mode of operation control the first branch road 21 and second branch road 22 of one pair of coolant air conditioners system, thereby control the first refrigerant or the second refrigerant circulate in closed circuit.
Above-mentioned indoor set 10 comprises indoor heat exchanger 11, above-mentioned off-premises station 20 comprises outdoor heat exchanger 23, cross valve 24, fluid reservoir 25, compressor 26 and orifice union 27, wherein, described indoor heat exchanger 11, orifice union 27 and outdoor heat exchanger 23 are communicated with successively, and the pipeline forming by cross valve 24 selective connection compressors 26 and 25 series connection of conventional fluid reservoir between described indoor heat exchanger 11 and outdoor heat exchanger 23.
The position of above-mentioned the first branch road 21 and the second branch road 22 can be selected according to actual needs, as long as be series in above-mentioned loop after the first branch road 21 is in parallel with the second branch road 22, and and off-premises station 20 and indoor set 10 between form the loop of a circulation.
Default mode of operation can be refrigeration mode, heating mode and dehumidification mode etc.Wherein, the principle of refrigeration mode and dehumidification mode is basic identical, so in the time that this one pair of coolant air conditioners system is set to refrigeration mode or dehumidification mode, the refrigerant moving in system is identical.
In the present embodiment, above-mentioned the first refrigerant is the refrigerant that is more conducive to refrigeration or dehumidifying, and above-mentioned the second refrigerant is to be more conducive to the refrigerant that heats, should be noted that, the component configuration mode of the first refrigerant and the second refrigerant is prior art, can select according to actual needs, does not explain at this.
In the time that above-mentioned one pair of coolant air conditioners system is set to refrigeration mode or dehumidification mode, controller control the first branch road 21 is opened, and the second branch road 22 closes, and now the second refrigerant is stored in the second branch road 22, only has the first refrigerant to circulate in above-mentioned closed circuit; In the time that above-mentioned one pair of coolant air conditioners system is set to heating mode, controller control the second branch road 22 is opened, and the first branch road 21 closes, and now the first refrigerant is stored in the first branch road 21, only has the second refrigerant to circulate in above-mentioned closed circuit.
One pair of coolant air conditioners system provided by the invention is by being provided for storing the first branch road 21 of the first refrigerant and for storing the second branch road 22 of the second refrigerant, after the first branch road 21 is in parallel with the second branch road 22, be series in above-mentioned closed circuit, controller opens and closes according to the corresponding branch road of the mode of operation control of one pair of coolant air conditioners system, and then control is more suitable for circulating in closed circuit in the refrigerant of above-mentioned mode of operation accordingly, thereby make air-conditioning system in same pipeline, preferably realize multiple-working mode, improved the Energy Efficiency Ratio of air-conditioning system simultaneously.
Particularly, the first branch road 21 comprises the first refrigerant storage tank 211, is located at the first entrance control valve 212 of the first refrigerant storage tank 211 arrival ends and is located at the first discharge control valve 213 of first refrigerant storage tank 211 ports of export; The second branch road 22 comprises the second refrigerant storage tank 221, be located at the second entrance control valve 222 of the second refrigerant storage tank 221 arrival ends and be located at the second discharge control valve of second refrigerant storage tank 221 ports of export; Controller opens or closes according to mode of operation control the first entrance control valve 212, the first discharge control valve 213, the second entrance control valve 222 and/or second discharge control valve 223 of one pair of coolant air conditioners system.
Above-mentioned the first branch road 21 is opened and is represented that the first entrance control valve 212 and the first discharge control valve 213 are held open state simultaneously, and the first branch road 21 is closed and represented that the first entrance control valve 212 and the first discharge control valve 213 keep closed condition simultaneously; Above-mentioned the second branch road 22 is opened and is represented that the second entrance control valve 222 and the second discharge control valve 223 are held open state simultaneously, and the second branch road 22 is closed and represented that the second entrance control valve 222 and the second discharge control valve 223 keep closed condition simultaneously.Should illustrate time, controller is separate to the control of the first entrance control valve 212, the first discharge control valve 213, the second entrance control valve 222 and the second discharge control valve 223, for example, controller can be controlled the first entrance control valve 212 and open, the first discharge control valve 213 cuts out simultaneously, also can control the second entrance control valve 222 and open, the second discharge control valve 223 cuts out simultaneously.Controller can arrange according to actual needs to the control of each control valve.
When above-mentioned one pair of coolant air conditioners system is during in refrigeration mode or dehumidification mode, controller control the first entrance control valve 212 and the first discharge control valve 213 are held open state simultaneously, and the second entrance control valve 222 and the second discharge control valve 223 keep closed condition simultaneously, now the second refrigerant is stored in the second refrigerant storage tank 221, only has the first refrigerant to circulate in above-mentioned loop; In the time that above-mentioned one pair of coolant air conditioners system is set to heating mode, controller control the second entrance control valve 222 and the second discharge control valve 223 are held open state simultaneously, and the first entrance control valve 212 and the first discharge control valve 213 keep closed condition simultaneously, now the first refrigerant is stored in the first refrigerant storage tank 211, only has the second refrigerant to circulate in above-mentioned loop.
Particularly, above-mentioned the first branch road 21 and the second branch road 22 are located at the port of export place of the compressor 26 of off-premises station 20.
In the present embodiment, fluid reservoir 25, compressor 26, the first branch road 21 are communicated with successively with the second branch road 22 pipeline forming in parallel, and the first discharge control valve 213 is all connected with the D pipe of cross valve 24 with the second discharge control valve 223, and the first entrance control valve 212 is all connected with the port of export of compressor 26 with the second entrance control valve 222.The S pipe of cross valve 24 is connected with fluid reservoir 25, and E pipe is connected with indoor heat exchanger 11, and C pipe is connected with outdoor heat exchanger 23.
When above-mentioned one pair of coolant air conditioners system is in the time freezing or dehumidify mode of operation, between the C pipe of cross valve 24 and D pipe, be communicated with, between S pipe and E pipe, be communicated with, the first branch road 21 is opened simultaneously, the second branch road 22 is closed, and the first refrigerant circulates along the direction of indoor heat exchanger 11, fluid reservoir 25, compressor 26, the first branch road 21, outdoor heat exchanger 23, orifice union 27, indoor heat exchanger 11; When above-mentioned one pair of coolant air conditioners system is in the time heating mode of operation, the D pipe of cross valve 24 is communicated with E pipe branch road, between C pipe and S pipe, be communicated with, the first branch road 21 is closed simultaneously, the second branch road 22 is opened, and the second refrigerant circulates along the direction of indoor heat exchanger 11, orifice union 27, outdoor heat exchanger 23, fluid reservoir 25, compressor 26, the second branch road 22, indoor heat exchanger 11.
When above-mentioned one pair of coolant air conditioners system by freeze or dehumidify mode of operation to heat mode of operation switch time, be the first refrigerant due to what flow in the loop of this air-conditioning system before, therefore need first after the first refrigerant recovering to the first refrigerant storage tank 211, then the second refrigerant in the second refrigerant storage tank 221 is released in loop; Or by heat mode of operation to refrigeration or dehumidifying mode of operation switch time, be the second refrigerant due to what flow in the loop of this air-conditioning system before, therefore need first after the second refrigerant recovering to the second refrigerant storage tank 221, then the first refrigerant in the first refrigerant storage tank 211 is released in loop.
The present embodiment is by being located at the first branch road 21 and the second branch road 22 at the port of export place of compressor 26, therefore in the time reclaiming the first refrigerant or the second refrigerant, can the refrigerant in loop be absorbed to compressor 26 by the dynamic action of compressor 26 self, and then be recycled in the first refrigerant storage tank 211 or the second refrigerant storage tank 221, refrigerant in loop not only can be absorbed cleanly, and save cost.
Particularly, the first entrance control valve 212, the first discharge control valve 213, the second entrance control valve 222 and/or the second discharge control valve 223 are check valve.In the present embodiment, the first entrance control valve 212, the first discharge control valve 213, the second entrance control valve 222 and the second discharge control valve 223 are all set to check valve.
Further, the arrival end place of above-mentioned the first branch road 21 and the second branch road 22 is provided with for the refrigerant of closed circuit being collected into the air pump device (not indicating in figure) in the first branch road 21 and the second branch road 22.In the present embodiment, the port of export place that the first branch road 21 and the second branch road 22 can be located at according to above-described embodiment compressor 26, also can be located at other positions in air-conditioning system loop.For example, the first branch road 21 and the second branch road 22 can be located between outdoor heat exchanger 23 and orifice union 27, or between fluid reservoir 25 and compressor 26 etc.Above-mentioned air pump device is located at the arrival end place of the first branch road 21 and the second branch road 22, for the first branch road 21, air pump device is located at one end of the first entrance control valve 212 of the first branch road 21, for the second branch road 22, air pump device is located at one end of the second entrance control valve 222 of the second branch road 22.Therefore, in the time that above-mentioned one pair of coolant air conditioners system is carried out refrigerant switching, can further rapidly the refrigerant in loop be absorbed cleanly by air pump device, improve the Energy Efficiency Ratio of air-conditioning, and improved the operating efficiency of air-conditioning.
The present invention also proposes a kind of refrigerant method for handover control based on above-mentioned one pair of coolant air conditioners system.
With reference to Fig. 3, Fig. 3 is the schematic flow sheet of one pair of coolant air conditioners system control method the first embodiment of the present invention, and the refrigerant method for handover control that the present embodiment proposes comprises the following steps:
The target mode of operation of switching is obtained in the refrigerant switching controls order of sending according to user;
In the time that described target pattern is the first mode of operation, after controlling in described the second refrigerant recovering to the second branch road, close described the second branch road and open the first branch road, control in the closed circuit that described the first refrigerant enters one pair of coolant air conditioners system and carry out heat exchange circulation;
In the time that described target pattern is the second mode of operation, after controlling in described the first refrigerant recovering to the first branch road, close described the first branch road and open the second branch road, control in the closed circuit that described the second refrigerant enters one pair of coolant air conditioners system and carry out heat exchange circulation.
Above-mentioned refrigerant method for handover control is specially following steps:
S10, the target mode of operation of switching is obtained in the refrigerant switching controls order of sending according to user;
S20, judges whether described target mode of operation is the first mode of operation, if so, performs step S30, if not, performs step S40;
S30, after controlling in described the second refrigerant recovering to the second branch road, closes described the second branch road and opens the first branch road, controls in the closed circuit that described the first refrigerant enters one pair of coolant air conditioners system and carries out heat exchange circulation;
S40, judges whether described target mode of operation is the second mode of operation, if so, performs step S50, if not, performs step S60;
S50, after controlling in described the first refrigerant recovering to the first branch road, closes described the first branch road and opens the second branch road, controls in the closed circuit that described the second refrigerant enters one pair of coolant air conditioners system and carries out heat exchange circulation;
S60, keeps current running status.
In the present embodiment, above-mentioned the first mode of operation represents refrigeration or dehumidifying mode of operation, and the second mode of operation represents to heat mode of operation.When the target mode of operation of above-mentioned switching is the first mode of operation, represents that described one pair of coolant air conditioners system work at present pattern is the second mode of operation, and received the control command that is switched to the first mode of operation by the second mode of operation; When the target mode of operation of above-mentioned switching is the second mode of operation, represents that described one pair of coolant air conditioners system work at present pattern is the first mode of operation, and received the control command that is switched to the second mode of operation by the first mode of operation.
After above-mentioned control the first refrigerant recovering to the first branch road, the step of opening the second branch road comprises: control that described the first entrance control valve stays open and the first discharge control valve keeps cutting out after the first Preset Time, close described the first entrance control valve and the first discharge control valve, and open described the second entrance control valve and the second discharge control valve.
After above-mentioned control the second refrigerant recovering to the second branch road, the step of opening the first branch road comprises: control that described the second entrance control valve stays open and the second discharge control valve keeps cutting out after the second Preset Time, close described the second entrance control valve and the second discharge control valve, and open described the first entrance control valve and the first discharge control valve.
When the control command of both not receiving as switched to the second mode of operation by the first mode of operation, do not receive that again, while switching to the control command of the first mode of operation by the second mode of operation, above-mentioned one pair of coolant air conditioners system keeps current running status.
The one pair of coolant air conditioners system that the refrigerant method for handover control that the present embodiment provides provides based on Fig. 1 and Fig. 2 describes, and the first branch road and the second branch road are located between cross valve and compressor.
The recovery time of the first refrigerant when above-mentioned the first Preset Time is refrigerant switching, the recovery time of the second refrigerant when the second Preset Time is refrigerant switching, the first Preset Time and the second Preset Time can arrange according to actual needs, specifically fixed to ensure that refrigerant can be recycled in corresponding refrigerant storage tank fully effectively according to air-conditioning system cooling and warming capacity of water.While reclaiming refrigerant by compressor operating, the refrigerant recovering time is generally 3 to 7 minutes, in the present embodiment, describes taking 5 minutes as example.
When air-conditioning system current during in the first mode of operation, this air-conditioning system internal operation first refrigerant, the first refrigerant circulation process is as follows: the first refrigerant is through compressor compresses, from the exhaust outlet of compressor flows out, because the second entrance control valve of the second branch road and the second discharge control valve are all in closed condition, therefore the first refrigerant only flows into the first branch road, flow into successively the first entrance control valve, the first refrigerant storage tank and the first discharge control valve, then pass through cross valve, because managing between C pipe, the D of cross valve is communicated with, between S pipe and E pipe, be communicated with, therefore the first refrigerant flows into outdoor heat exchanger after by cross valve, in outdoor heat exchanger, undertaken after cold and hot exchange by forced-convection heat transfer with outdoor air, take away heat by outdoor air, then the first refrigerant flows into orifice union through outdoor heat exchanger lateral line again, and flow into indoor heat exchanger, the first refrigerant carries out after cold and hot exchange with indoor air in indoor heat exchanger, the first refrigerant is taken away the heat of indoor air, thereby realize the effect to indoor environment refrigeration, afterwards, the first refrigerant flows into fluid reservoir through cross valve again, and sucked by the air inlet of compressor, thereby complete a cyclic process, so go round and begin again, realize refrigeration or dehumidification function.
In the time that the target mode of operation of described one pair of coolant air conditioners system acquisition is the second mode of operation, when described one pair of coolant air conditioners system is received while switching to the control command of the second mode of operation by the first mode of operation, before this control command of response, the first entrance control valve and the first discharge control valve are all in opening, the second entrance control valve and the second discharge control valve are all in closed condition, and between the D of cross valve pipe and C pipe, be communicated with, between S pipe and E pipe, be communicated with; After this control command of response, controller control first discharge control valve keep close and other control valve states constant, now the first refrigerant is recycled in the first refrigerant storage tank gradually, when the first discharge control valve keeps cutting out after the first Preset Time, close the first entrance control valve, open the second entrance control valve and the second discharge control valve simultaneously; Above-mentioned control air-conditioning system enters the second mode of operation and represents between the D pipe of cross valve and E pipe, to be communicated with, and is communicated with between C pipe and S pipe, and therefore, the second refrigerant is released in the loop in air-conditioning system, and air-conditioning system is moved under the second mode of operation.
When air-conditioning system current during in the second mode of operation, this air-conditioning system internal operation second refrigerant, the second refrigerant circulation process is as follows: the second refrigerant is through compressor compresses, from the exhaust outlet of compressor flows out, because the first entrance control valve of the first branch road and the first discharge control valve are all in closed condition, therefore the second refrigerant only flows into the second branch road, flow into successively the second entrance control valve, the second refrigerant storage tank and the second discharge control valve, then pass through cross valve, because managing between E pipe, the D of cross valve is communicated with, between C pipe and S pipe, be communicated with, therefore the second refrigerant flows into indoor heat exchanger after by cross valve, in indoor heat exchanger, undertaken after cold and hot exchange by forced-convection heat transfer with indoor air, take away heat by room air, thereby realize the effect that indoor environment is heated, then the second refrigerant flows into orifice union through indoor heat exchanger lateral line again, and flow into outdoor heat exchanger, in outdoor heat exchanger, carry out after cold and hot exchange with outdoor air, the second refrigerant is taken away the heat of outdoor air, afterwards, the second refrigerant flows into fluid reservoir through cross valve again, and sucked by the air inlet of compressor, thereby complete a cyclic process, so go round and begin again, realize heat-production functions.
In the time that the target mode of operation of described one pair of coolant air conditioners system acquisition is the first mode of operation, when described one pair of coolant air conditioners system is received while switching to the control command of the first mode of operation by the second mode of operation, before this control command of response, the second entrance control valve and the second discharge control valve are all in opening, the first entrance control valve and the first discharge control valve are all in closed condition, and between the D of cross valve pipe and E pipe, be communicated with, and be communicated with between C pipe and S pipe; After this control command of response, controller control second discharge control valve keep close and other control valve states constant, now the second refrigerant is recycled in the second refrigerant storage tank gradually, when the second discharge control valve keeps cutting out after the second Preset Time, close the second entrance control valve, open the first entrance control valve and the first discharge control valve simultaneously; Above-mentioned control air-conditioning system enters the first mode of operation and represents, by being communicated with between the D pipe of cross valve and C pipe, between S pipe and E pipe, to be communicated with, and therefore, the first refrigerant is released in the loop in air-conditioning system, and air-conditioning system is moved under the first mode of operation.
The one pair of coolant air conditioners system refrigerant method for handover control that the present invention proposes, in the time that the target mode of operation of obtaining is the second mode of operation, after first controlling in the first refrigerant recovering to the first branch road, close the first branch road and open the second branch road, then control in the closed circuit that the second refrigerant enters one pair of coolant air conditioners system and carry out heat exchange circulation; In the time that the target mode of operation of obtaining is the first mode of operation, after first controlling in the second refrigerant recovering to the second branch road, close the second branch road and open the first branch road, then control in the closed circuit that the first refrigerant enters one pair of coolant air conditioners system and carry out heat exchange circulation.Above-mentioned refrigerant method for handover control according to the corresponding refrigerant recovering of refrigerant switching controls instruction control to respective branch, and then control and in above-mentioned loop, only exist a kind of being more suitable for to circulate in loop in the refrigerant of default mode of operation, thereby make air-conditioning system in same pipeline, preferably realize multiple-working mode, improved the Energy Efficiency Ratio of air-conditioning system simultaneously.
With reference to Fig. 4, Fig. 4 is the schematic flow sheet of one pair of coolant air conditioners system control method the second embodiment of the present invention.Based on above-mentioned the first embodiment, the present invention also proposes the second embodiment of refrigerant method for handover control.What the second embodiment was different from the first embodiment is, it is described in the time that described target pattern is the second mode of operation, after controlling in described the first refrigerant recovering to the first branch road, close described the first branch road and open the second branch road, controlling the step of carrying out heat exchange circulation in the closed circuit that described the second refrigerant enters one pair of coolant air conditioners system and specifically comprise:
When described target pattern is the second mode of operation, and when the residing environment temperature of described off-premises station is less than or equal to the first preset temperature, after controlling in described the first refrigerant recovering to the first branch road, close described the first branch road and open the second branch road, controlling in the closed circuit that described the second refrigerant enters one pair of coolant air conditioners system and carry out heat exchange circulation.
The refrigerant method for handover control that the present embodiment provides is specially: further comprising the steps of before carrying out above-mentioned steps S50:
S70, judges whether the residing environment temperature of described off-premises station is less than or equal to the first preset temperature, if so, performs step S50, if not, performs step S60.
The general value of above-mentioned the first preset temperature is 10 to 17 degrees Celsius, and in the present embodiment, the first preset temperature is made as 15 degrees Celsius.
It should be noted that in the time that the residing environment temperature of above-mentioned off-premises station is greater than the first preset temperature, and received the order of refrigerant switching controls, think that the control instruction that user sends is maloperation, therefore air-conditioning system still keeps current running status.
The present embodiment is by judging whether the residing environment temperature of off-premises station is less than or equal to the first preset temperature, in order to judge the whether suitable heating mode of current outdoor temperature (being whether suitable second mode of operation that enters of air-conditioning system), prevent because user misoperation causes air-conditioning system switching working mode continually, and then switch continually refrigerant, extend the service life of air-conditioning system.
Further, please referring again to Fig. 4, in the time that described target pattern is the first mode of operation, after controlling in described the second refrigerant recovering to the second branch road, close described the second branch road and open the first branch road, controlling the step of carrying out heat exchange circulation in the closed circuit that described the first refrigerant enters one pair of coolant air conditioners system and specifically comprise:
When described target pattern is the first mode of operation, and when the residing environment temperature of described off-premises station is more than or equal to the second preset temperature, after controlling in described the second refrigerant recovering to the second branch road, close described the second branch road and open the first branch road, controlling in the closed circuit that described the first refrigerant enters one pair of coolant air conditioners system and carry out heat exchange circulation.
The refrigerant method for handover control that the present embodiment provides is specially: before execution step S30, also comprise:
S80, judges whether the residing environment temperature of described off-premises station is more than or equal to the second preset temperature, if so, performs step S30, if not, performs step S60.
The general value of above-mentioned the second preset temperature is 18 to 26 degrees Celsius, and in the present embodiment, the second preset temperature is made as 18 degrees Celsius.
It should be noted that in the time that the residing environment temperature of above-mentioned off-premises station is less than the second preset temperature, and received the order of refrigerant switching controls, think that the control instruction that user sends is maloperation, therefore air-conditioning system still keeps current running status.
The present embodiment is by judging whether the residing environment temperature of off-premises station is more than or equal to the second preset temperature, in order to judge the whether suitable refrigeration mode of current outdoor temperature or dehumidification mode (being whether suitable second mode of operation that enters of air-conditioning system), prevent because user misoperation causes air-conditioning system switching working mode continually, and then switch continually refrigerant, extend the service life of air-conditioning system.
With reference to Fig. 5, Fig. 5 is the schematic flow sheet of refrigerant method for handover control the 3rd embodiment of the present invention.Based on above-mentioned the second embodiment, the present invention also proposes the 3rd embodiment of refrigerant method for handover control.What the 3rd embodiment was different from the second embodiment is, it is described in the time that described target pattern is the second mode of operation, after controlling in described the first refrigerant recovering to the first branch road, close described the first branch road and open the second branch road, controlling the step of carrying out heat exchange circulation in the closed circuit that described the second refrigerant enters one pair of coolant air conditioners system and specifically comprise:
When described target pattern is that number of times that the second mode of operation, the residing environment temperature of described off-premises station are greater than the first preset temperature and receive the order of described refrigerant switching controls is while being more than or equal to the first preset number of times, after controlling in described the first refrigerant recovering to the first branch road, close described the first branch road and open the second branch road, controlling in the closed circuit that described the second refrigerant enters one pair of coolant air conditioners system and carry out heat exchange circulation.
The refrigerant method for handover control that the present embodiment provides is specially: described step S70 specifically comprises:
S71, judges whether the residing environment temperature of described off-premises station is less than or equal to the first preset temperature, if so, performs step S50, if not, performs step S72;
S72, judgement receives whether the number of times of described refrigerant switching controls order is more than or equal to the first preset number of times, if so, performs step S50, if not, performs step S60.
In the present embodiment, the first preset number of times is set to twice, and in other embodiments, the first preset number of times also can be set to more than twice, in this no limit.In the time that the residing environment temperature of off-premises station is greater than the first preset temperature, if user is double or repeatedly sent the control command by the first working mode change to the second mode of operation, be shown to be the real pattern of user and switch demand, instead of maloperation, therefore air-conditioning system automatically switches to the required mode of operation of user according to user's wish, has improved user and use the degree of convenience of air-conditioning.
Further, please referring again to Fig. 5, it is described in the time that described target pattern is the first mode of operation, after controlling in described the second refrigerant recovering to the second branch road, close described the second branch road and open the first branch road, controlling the step of carrying out heat exchange circulation in the closed circuit that described the first refrigerant enters one pair of coolant air conditioners system and specifically comprise:
When described target pattern is that the first mode of operation, the residing environment temperature of described off-premises station are less than the second preset temperature, and when the number of times of receiving the order of described refrigerant switching controls is more than or equal to the second preset number of times, after controlling in described the second refrigerant recovering to the second branch road, close described the second branch road and open the first branch road, controlling in the closed circuit that described the first refrigerant enters one pair of coolant air conditioners system and carry out heat exchange circulation.
The refrigerant method for handover control that the present embodiment provides is specially: described step S80 specifically comprises:
S81, judges whether the residing environment temperature of described off-premises station is more than or equal to the second preset temperature, if so, performs step S30, if not, performs step S82;
S82, judges whether the number of times of described refrigerant switching controls order is more than or equal to the second preset number of times, if so, performs step S30, if not, performs step S60.
In the present embodiment, the second preset number of times is set to twice, and in other embodiments, the second preset number of times also can be set to more than twice, in this no limit.In the time that the residing environment temperature of off-premises station is less than the second preset temperature, if user is double or repeatedly sent the control command by the second working mode change to the first mode of operation, be shown to be the real pattern of user and switch demand, instead of maloperation, therefore air-conditioning system automatically switches to the required mode of operation of user according to user's wish, has improved user and use the degree of convenience of air-conditioning.
These are only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.

Claims (10)

1. an one pair of coolant air conditioners system, comprise controller, indoor set and off-premises station, described indoor set and described off-premises station are connected to form a closed circuit by pipeline, it is characterized in that, described one pair of coolant air conditioners system also comprises the first branch road for storing the first refrigerant and for storing the second branch road of the second refrigerant, after described the first branch road and described the second branch circuit parallel connection, is series in described closed circuit; Described controller opens or closes according to the first branch road described in the mode of operation control of described one pair of coolant air conditioners system and the second branch road, thereby controls described the first refrigerant or the second refrigerant circulates in described closed circuit.
2. one pair of coolant air conditioners system as claimed in claim 1, is characterized in that,
Described the first branch road comprises the first refrigerant storage tank, be located at the first entrance control valve of described the first refrigerant storage tank arrival end and be located at the first discharge control valve of the described first refrigerant storage tank port of export;
Described the second branch road comprises the second refrigerant storage tank, be located at the second entrance control valve of described the second refrigerant storage tank arrival end and be located at the second discharge control valve of the described second refrigerant storage tank port of export;
Described controller opens or closes according to the first entrance control valve, the first discharge control valve, the second entrance control valve and/or the second discharge control valve described in the mode of operation control of described one pair of coolant air conditioners system.
3. one pair of coolant air conditioners system as claimed in claim 2, is characterized in that, described the first branch road and the second branch road are located at the port of export place of the compressor of described off-premises station.
4. one pair of coolant air conditioners system as claimed in claim 2 or claim 3, is characterized in that, the arrival end place of described the first branch road and the second branch road is provided with for the refrigerant of described closed circuit being collected into the air pump device in described the first branch road and the second branch road.
5. one pair of coolant air conditioners system as claimed in claim 3, is characterized in that, described the first entrance control valve, the first discharge control valve, the second entrance control valve and/or the second discharge control valve are check valve.
6. a control method for the one pair of coolant air conditioners system described in claim 1 to 5 any one, is characterized in that, comprises the following steps:
The target mode of operation of switching is obtained in the refrigerant switching controls order of sending according to user;
In the time that described target pattern is the first mode of operation, after controlling in described the second refrigerant recovering to the second branch road, close described the second branch road and open the first branch road, control in the closed circuit that described the first refrigerant enters one pair of coolant air conditioners system and carry out heat exchange circulation;
In the time that described target pattern is the second mode of operation, after controlling in described the first refrigerant recovering to the first branch road, close described the first branch road and open the second branch road, control in the closed circuit that described the second refrigerant enters one pair of coolant air conditioners system and carry out heat exchange circulation.
7. control method as claimed in claim 6, it is characterized in that, in the time that described target pattern is the second mode of operation, after controlling in described the first refrigerant recovering to the first branch road, close described the first branch road and open the second branch road, controlling the step of carrying out heat exchange circulation in the closed circuit that described the second refrigerant enters one pair of coolant air conditioners system and specifically comprise:
When described target pattern is the second mode of operation, and when the residing environment temperature of described off-premises station is less than or equal to the first preset temperature, after controlling in described the first refrigerant recovering to the first branch road, close described the first branch road and open the second branch road, controlling in the closed circuit that described the second refrigerant enters one pair of coolant air conditioners system and carry out heat exchange circulation.
8. control method as claimed in claim 6, it is characterized in that, in the time that described target pattern is the second mode of operation, after controlling in described the first refrigerant recovering to the first branch road, close described the first branch road and open the second branch road, controlling the step of carrying out heat exchange circulation in the closed circuit that described the second refrigerant enters one pair of coolant air conditioners system and specifically comprise:
When described target pattern is that number of times that the second mode of operation, the residing environment temperature of described off-premises station are greater than the first preset temperature and receive the order of described refrigerant switching controls is while being more than or equal to the first preset number of times, after controlling in described the first refrigerant recovering to the first branch road, close described the first branch road and open the second branch road, controlling in the closed circuit that described the second refrigerant enters one pair of coolant air conditioners system and carry out heat exchange circulation.
9. control method as claimed in claim 6, it is characterized in that, in the time that described target pattern is the first mode of operation, after controlling in described the second refrigerant recovering to the second branch road, close described the second branch road and open the first branch road, controlling the step of carrying out heat exchange circulation in the closed circuit that described the first refrigerant enters one pair of coolant air conditioners system and specifically comprise:
When described target pattern is the first mode of operation, and when the residing environment temperature of described off-premises station is more than or equal to the second preset temperature, after controlling in described the second refrigerant recovering to the second branch road, close described the second branch road and open the first branch road, controlling in the closed circuit that described the first refrigerant enters one pair of coolant air conditioners system and carry out heat exchange circulation.
10. control method as claimed in claim 6, it is characterized in that, in the time that described target pattern is the first mode of operation, after controlling in described the second refrigerant recovering to the second branch road, close described the second branch road and open the first branch road, controlling the step of carrying out heat exchange circulation in the closed circuit that described the first refrigerant enters one pair of coolant air conditioners system and specifically comprise:
When described target pattern is that the first mode of operation, the residing environment temperature of described off-premises station are less than the second preset temperature, and when the number of times of receiving the order of described refrigerant switching controls is more than or equal to the second preset number of times, after controlling in described the second refrigerant recovering to the second branch road, close described the second branch road and open the first branch road, controlling in the closed circuit that described the first refrigerant enters one pair of coolant air conditioners system and carry out heat exchange circulation.
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