CN107726567B - Control method and system of fresh air machine, fresh air machine and multi-split air conditioning system - Google Patents
Control method and system of fresh air machine, fresh air machine and multi-split air conditioning system Download PDFInfo
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- CN107726567B CN107726567B CN201711008867.1A CN201711008867A CN107726567B CN 107726567 B CN107726567 B CN 107726567B CN 201711008867 A CN201711008867 A CN 201711008867A CN 107726567 B CN107726567 B CN 107726567B
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Abstract
The invention provides a control method and a control system of a fresh air fan, the fresh air fan and a multi-split air conditioning system. The fresh air machine is used for the multi-split air conditioning system, the fresh air machine is provided with a heat exchange unit and a valve body for controlling the flow of a refrigerant entering the heat exchange unit, and the control method of the fresh air machine comprises the following steps: when the system runs, acquiring the load of a fresh air machine and the total load of the multi-split air-conditioning system; judging whether the ratio of the load of the fresh air fan to the total load is less than or equal to a preset value; and when the judgment result is negative, controlling the valve body to reduce the opening. According to the invention, when the system operates, the proportion of the new fan load to the total load of the multi-split air-conditioning system is detected, when the proportion of the new fan load to the total load is large, the valve body is controlled to reduce the opening in time, the amount of the refrigerant entering the new fan is reduced, the degradation of the refrigerating or heating effect of other inner machines in the multi-split air-conditioning system caused by the excessive amount of the refrigerant occupied by the new fan can be effectively avoided, and the user experience is improved.
Description
Technical Field
The invention belongs to the technical field of air conditioning equipment, and particularly relates to a control method of a fresh air fan, a control system of the fresh air fan, the fresh air fan and a multi-split air conditioning system.
Background
Along with the rapid development of economy in China, the consciousness of health and environmental protection of people is gradually enhanced, and new fans are more and more applied to production and life of people. However, it cannot be denied that due to the characteristic of the outdoor return air of the fresh air machine and the large heat exchange area of the fresh air machine, the fresh air machine often can contain most of the refrigerants in the multi-split air-conditioning system, so that the amount of the refrigerants in the heat exchangers of the indoor units of the same multi-split air-conditioning system with the fresh air machine is reduced, the refrigerating and heating effects of other indoor units of the multi-split air-conditioning system are affected, and the user experience is affected.
Disclosure of Invention
The present invention is directed to solving one of the technical problems of the prior art.
Therefore, the invention provides a control method of the fresh air machine in a first aspect.
The second aspect of the invention provides a control system of a new fan.
A third aspect of the invention provides a new fan.
A fourth aspect of the present invention provides a multi-split air conditioning system.
In view of the above, a first aspect of the present invention provides a method for controlling a fresh air machine, where the fresh air machine is used in a multi-split air conditioning system, the fresh air machine includes a heat exchange unit and a valve body for controlling a flow rate of a refrigerant entering the heat exchange unit, and the method includes: when the system runs, acquiring the load of a fresh air machine and the total load of the multi-split air-conditioning system; judging whether the ratio of the load of the fresh air fan to the total load is less than or equal to a preset value; and when the judgment result is negative, controlling the valve body to reduce the opening.
The multi-split air conditioning system comprises the fresh air machine and the multi-split air machine, wherein the total amount of the refrigerant shared by the fresh air machine and the multi-split air machine is certain, and because the fresh air machine needs to return air from the outside, the heat exchange area is large, and further, the amount of the refrigerant occupied by the fresh air machine is large, so that the amount of the refrigerant occupied by the indoor machine of the multi-split air machine is reduced, and the refrigerating or heating effect of the multi-split air machine is seriously. According to the invention, the proportion of the new fan load to the total load of the multi-split air-conditioning system is detected when the system is in operation, so that the amount of the refrigerant occupied by the new fan can be reflected, and further, when the proportion of the new fan load is large, namely the refrigerant occupied by the new fan is large, the valve body can be controlled to reduce the opening degree in time, the refrigerant flow entering the new fan is reduced, the refrigerant flow entering the indoor unit of the multi-split air-conditioning system is increased, the refrigeration or heating effect of other indoor units in the multi-split air-conditioning system is effectively prevented from being deteriorated due to the fact that the new fan occupies too much refrigerant, and the user experience is improved. Preferably, the valve body is an electronic expansion valve.
In addition, the control method of the fresh air machine in the technical scheme provided by the invention also has the following additional technical characteristics:
in the above technical solution, preferably, after the controlling the valve body to reduce the opening degree, the method further includes: and starting timing, and returning to execute to obtain the load of the fresh air machine and the total load of the multi-split air-conditioning system after the first preset time is reached.
In the technical scheme, timing is carried out after the opening degree of the valve body is reduced, and after the first preset time is reached, the load of the fresh air fan and the total load of the multi-split air conditioning system are obtained again, and the proportion of the load of the fresh air fan to the total load is recalculated In enclosing, when the new fan load occupy when the ratio of total load is less than or equal to the default, this moment, the valve body controlled under this aperture get into the refrigerant flow in the heat transfer unit can not occupy too much, can not influence the refrigerant demand of the indoor set of many online, improve the whole operation effect of new fan and many online, when the new fan load occupies when the ratio of total load is greater than the default, show that the refrigerant volume that the new fan occupy is still very big, continue to control the valve body and reduce the aperture, further the refrigerant flow that gets into the heat transfer unit of new fan through the valve body restriction.
In any one of the above technical solutions, preferably, the fresh air machine has at least two heat exchange units and at least two valve bodies, the valve bodies correspond to the heat exchange units one to one, any two heat exchange units in the at least two heat exchange units are connected in parallel, and the control valve body reduces the opening degree and specifically includes: calculating the times of reaching the first preset time; and controlling at least one valve body to reduce the opening degree according to a preset sequence corresponding to the times.
In the technical scheme, the fresh air machine is provided with at least two heat exchange units and at least two valve bodies corresponding to the heat exchange units one to one, any two heat exchange units in the at least two heat exchange units are connected in parallel, and when the ratio of the load of the fresh air machine to the total load is greater than a preset value, at least one valve body can be controlled to reduce the opening degree according to the sequence corresponding to the times reaching the first preset time. For example, when the number of times of reaching the first preset time is zero, the first valve body of the at least two valve bodies can be controlled to reduce the opening degree, the first valve body is any one of the valve bodies, the valve bodies are numbered only for convenience of description, when the number of times of reaching the first preset time is one, the second valve body can be controlled to reduce the opening degree, the second valve body and the third valve body can be controlled to reduce the opening degree simultaneously, the first valve body can be controlled to be completely closed, and the opening degrees of the valve bodies can be controlled according to an appropriate sequence according to actual conditions. Through further refining the control of the at least two valve bodies, the requirement of the multi-split air conditioner on the refrigerant can be met under the condition that the fresh air machine occupies as much refrigerant as possible, the integral operation effect of the fresh air machine and the multi-split air conditioner is ensured at the same time, and the phenomenon that the normal operation of the fresh air machine is influenced due to too little refrigerant entering amount of a heat exchange unit of the fresh air machine caused by only pursuing the operation effect of the multi-split air conditioner is avoided.
In any one of the above technical solutions, preferably, after the controlling the valve body to reduce the opening degree, the method further includes: when the ratio of the load of the fresh air fan to the total load is judged to be less than or equal to a preset value, controlling the valve body to keep the current opening; when the ratio of the load of the fresh air fan to the total load is judged to be larger than a preset value, whether the at least two valve bodies are closed or not is judged; when the at least two valve bodies are judged to be completely closed, the valve bodies are controlled to be kept in a closed state; and when judging that the at least two valve bodies are not completely closed, controlling the valve bodies to reduce the opening degree.
In the technical scheme, after the opening degree of the control valve body is reduced, the load and the total load of the new fan are obtained again, whether the ratio of the load to the total load of the new fan is smaller than or equal to a preset value or not is judged again, when the judgment result is yes, the opening degree of the valve body at the moment is maintained, the new fan is enabled to continue to operate under the condition of the refrigerant entering amount controlled by the valve body, the operation state of the new fan and the multi-split air machine is met, the opening degree of the valve body at the moment can be maintained all the time until a shutdown instruction is received, extra control on the valve body can be removed after third preset time, the opening degree of the valve body is adjusted according to a new fan program, the new fan can adjust the valve body in time according to received adjusting information sent by a user. Preferably, when an adjusting instruction sent by a user is received, the opening of the valve body is controlled according to a fresh air program, counting is started, and after a fourth preset time is reached, the steps in any one of the technical schemes are executed to obtain the load of the fresh air machine and the total load of the multi-split air conditioning system so as to adjust the valve body. In addition, when the ratio of the load of the fresh air fan to the total load is judged to be larger than a preset value, whether the at least two valve bodies are completely closed is further judged, and when the at least two valve bodies are completely closed, the opening degree of the valve bodies cannot be continuously reduced, so that the valve bodies are controlled to be in the current closed state, and the refrigerant occupation amount of the fresh air fan is reduced as much as possible.
In any of the above technical solutions, preferably, after acquiring the load of the fresh air machine and the total load of the multi-split air conditioning system, the method further includes: and judging whether the load of the new fan is equal to the total load, and controlling the new fan to continuously execute a new fan program when the load of the new fan is equal to the total load.
In the technical scheme, after the load of the fresh air machine and the total load of the multi-split air-conditioning system are obtained, whether the load of the fresh air machine is equal to the total load or not is also judged, when the load of the fresh air machine is equal to the total load, only the fresh air machine operates in the multi-split air-conditioning system at the moment, the operation condition of the multi-split air-conditioning system is not needed to be managed, the operation of the fresh air machine can be directly controlled according to a fresh air program, wherein whether the load of the fresh air machine is equal to the total load or not is judged firstly, and then whether the ratio of the load of the fresh air machine to.
In any of the above technical solutions, preferably, when it is determined that the ratio of the load of the fresh air machine to the total load is less than or equal to the preset value, the fresh air machine is controlled to continue to execute the fresh air program.
In the technical scheme, on the premise that the opening degree of the valve body is not controlled to be reduced, when the ratio of the load of the fresh air fan to the total load is judged to be smaller than or equal to the preset value for the first time, at the moment, the opening degree of the valve body of the fresh air fan directly meets the requirement of the amount of the refrigerant of the fresh air fan and the multi-split air conditioner, and the fresh air fan is directly controlled to operate according to the fresh air program.
In any one of the above technical solutions, preferably, after the fresh air machine is controlled to continue to execute the fresh air program, the method further includes: and starting timing, and returning to execute to obtain the load of the fresh air machine and the total load of the multi-split air-conditioning system after reaching the second preset time.
In the technical scheme, after the new fan is controlled to continue to execute the new fan program, timing is started, the new fan load and the total load of the multi-split air conditioning system are obtained again after the second preset time, whether the occupied amount of the refrigerant of the new fan is too large can be reflected at any time, so that the opening degree of the valve body can be adjusted in time, and the situation that the operation effect of the multi-split air conditioner is influenced due to the fact that the occupied load of the new fan is increased and the occupied refrigerant amount is increased after the new fan adjusts the opening degree of the valve body under the control of the new fan program is avoided.
The second aspect of the present invention provides a control system for a fresh air machine, the fresh air machine is used for a multi-split air conditioning system, the fresh air machine has a heat exchange unit and a valve body for controlling the flow of a refrigerant entering the heat exchange unit, and the control system for the fresh air machine includes: the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring a new air fan load and the total load of the multi-split air conditioning system when the system runs; the first judging unit is used for judging whether the ratio of the load of the fresh air fan to the total load is less than or equal to a preset value; and the first control unit is used for controlling the valve body to reduce the opening degree when the judgment result is negative.
According to the multi-split air conditioning system, the acquiring unit is used for acquiring the load of the new fan and the total load of the multi-split air conditioning system when the system operates, the first judging unit is used for judging the proportion of the load of the new fan to the total load of the multi-split air conditioning system, and the amount of the refrigerant occupied by the new fan can be reflected, so that when the proportion of the load of the new fan is large, namely the refrigerant occupied by the new fan is large, the first control unit can timely control the valve body to reduce the opening degree, reduce the flow of the refrigerant entering the new fan, further increase the flow of the refrigerant entering the indoor unit of the multi-split air conditioning system, effectively avoid the deterioration of the refrigerating or heating effect of other indoor units in the multi-split air conditioning system caused by the fact that the. Preferably, the valve body is an electronic expansion valve.
In addition, the control system of the fresh air fan in the technical scheme provided by the invention also has the following additional technical characteristics:
in the above technical solution, preferably, the control system of the new fan further includes: and the first timing unit is used for starting timing after the control unit is activated and activating the acquisition unit after the first preset time is reached.
In the technical scheme, after the opening degree of the valve body is reduced, the first technical unit times, and after a first preset time is reached, the acquisition unit is activated to reacquire the load of the new fan and the total load of the multi-split air conditioning system, and the proportion of the load of the new fan to the total load is recalculated, on one hand, the first preset time gives time for the load change of the new fan after the opening degree of the valve body is reduced, so that the situation that the load of the new fan and the acquired information under the opening degree of the valve body are seriously wrong under normal conditions due to small load change of the new fan in a short time after the opening degree of the valve body is reduced, and finally the control of the opening degree of the valve body is inaccurate, and the operation effect of the new fan and the multi-split air conditioner is influenced is avoided, on the other hand, after the first preset time is reached, the load and the total load of the new fan are reac, whether the valve body can meet the requirement that the ratio of the total load occupied by the new fan load is within a preset range or not under the current opening degree is reflected in time, when the ratio of the total load occupied by the new fan load is smaller than or equal to a preset value, at the moment, the refrigerant flow, controlled by the valve body under the opening degree, entering the heat exchange unit cannot occupy too much, the refrigerant demand of the indoor unit of the multi-split air conditioner cannot be influenced, the overall operation effect of the new fan and the multi-split air conditioner is improved, when the ratio of the total load occupied by the new fan load is larger than the preset value, the refrigerant amount occupied by the new fan is still large, the valve body is continuously controlled to reduce the opening degree, and the refrigerant flow, entering the heat exchange unit.
In any of the above technical solutions, preferably, the fresh air machine has at least two heat exchange units and at least two valve bodies, and the valve bodies correspond to the heat exchange units one to one; the first control unit is specifically configured to: calculating the times of reaching the first preset time; and controlling at least one valve body to reduce the opening degree according to a preset sequence corresponding to the times.
In the technical scheme, the fresh air machine is provided with at least two heat exchange units and at least two valve bodies corresponding to the heat exchange units one to one, any two heat exchange units in the at least two heat exchange units are connected in parallel, and when the ratio of the load of the fresh air machine to the total load is greater than a preset value, at least one valve body can be controlled to reduce the opening degree according to the sequence corresponding to the times reaching the first preset time. For example, when the number of times of reaching the first preset time is zero, the first valve body of the at least two valve bodies can be controlled to reduce the opening degree, the first valve body is any one of the valve bodies, the valve bodies are numbered only for convenience of description, when the number of times of reaching the first preset time is one, the second valve body can be controlled to reduce the opening degree, the second valve body and the third valve body can be controlled to reduce the opening degree simultaneously, the first valve body can be controlled to be completely closed, and the opening degrees of the valve bodies can be controlled according to an appropriate sequence according to actual conditions. Through further refining the control of the at least two valve bodies, the requirement of the multi-split air conditioner on the refrigerant can be met under the condition that the fresh air machine occupies as much refrigerant as possible, the integral operation effect of the fresh air machine and the multi-split air conditioner is ensured at the same time, and the phenomenon that the normal operation of the fresh air machine is influenced due to too little refrigerant entering amount of a heat exchange unit of the fresh air machine caused by only pursuing the operation effect of the multi-split air conditioner is avoided.
In any one of the above technical solutions, preferably, the control system of the new air blower further includes: the second control unit is used for controlling the valve body to keep the current opening degree when the ratio of the load of the fresh air fan to the total load is judged to be less than or equal to a preset value; the second judging unit is used for judging whether the at least two valve bodies are closed or not when the ratio of the load of the fresh air fan to the total load is judged to be larger than a preset value; the third control unit is used for controlling the valve bodies to keep a closed state when judging that the at least two valve bodies are completely closed; and the fourth control unit executes control to reduce the opening degree of the valve body when judging that the at least two valve bodies are not closed completely.
In the technical scheme, after the opening degree of the control valve body is reduced, the load and the total load of the new fan are obtained again, whether the ratio of the load to the total load of the new fan is smaller than or equal to a preset value or not is judged again, when the judgment result is yes, the opening degree of the valve body at the moment is maintained, the new fan is enabled to continue to operate under the condition of the refrigerant entering amount controlled by the valve body, the operation state of the new fan and the multi-split air machine is met, the opening degree of the valve body at the moment can be maintained all the time until a shutdown instruction is received, extra control on the valve body can be removed after third preset time, the opening degree of the valve body is adjusted according to a new fan program, the new fan can adjust the valve body in time according to received adjusting information sent by a user. Preferably, when an adjusting instruction sent by a user is received, the opening of the valve body is controlled according to a fresh air program, counting is started, and after a fourth preset time is reached, the steps in any one of the technical schemes are executed to obtain the load of the fresh air machine and the total load of the multi-split air conditioning system so as to adjust the valve body. In addition, when the ratio of the load of the fresh air fan to the total load is judged to be larger than a preset value, whether the at least two valve bodies are completely closed is further judged, and when the at least two valve bodies are completely closed, the opening degree of the valve bodies cannot be continuously reduced, so that the valve bodies are controlled to be in the current closed state, and the refrigerant occupation amount of the fresh air fan is reduced as much as possible.
In any one of the above technical solutions, preferably, the control system of the new air blower further includes: the third judging unit is used for judging whether the load of the fresh air fan is equal to the total load or not; and the fifth control unit is used for controlling the fresh air fan to continuously execute the fresh air program when the third judgment unit judges that the air supply unit is yes.
In the technical scheme, after the load of the fresh air machine and the total load of the multi-split air-conditioning system are obtained, whether the load of the fresh air machine is equal to the total load or not is also judged, when the load of the fresh air machine is equal to the total load, only the fresh air machine operates in the multi-split air-conditioning system at the moment, the operation condition of the multi-split air-conditioning system is not needed to be managed, the operation of the fresh air machine can be directly controlled according to a fresh air program, wherein whether the load of the fresh air machine is equal to the total load or not is judged firstly, and then whether the ratio of the load of the fresh air machine to.
In any of the above technical solutions, preferably, the first control unit is further configured to control the fresh air machine to continue to execute the fresh air program when it is determined that the ratio of the load of the fresh air machine to the total load is less than or equal to a preset value.
In the technical scheme, on the premise that the opening degree of the valve body is not controlled to be reduced, when the ratio of the load of the fresh air fan to the total load is judged to be smaller than or equal to the preset value for the first time, at the moment, the opening degree of the valve body of the fresh air fan directly meets the requirement of the amount of the refrigerant of the fresh air fan and the multi-split air conditioner, and the fresh air fan is directly controlled to operate according to the fresh air program.
In any one of the above technical solutions, preferably, the control system of the new air blower further includes: and the second timing unit is used for starting timing after the fresh air fan continues to execute the fresh air program and activating the acquisition unit after second preset time is reached.
In the technical scheme, after the new air blower is controlled to continue to execute the new air blower program, the second timing unit starts timing, and after the second preset time, the acquisition unit is activated to acquire the new air blower load and the total load of the multi-split air conditioning system again, so that whether the occupied amount of the refrigerant of the new air blower is too large can be reflected at any time, the opening degree of the valve body can be adjusted in time, and the situation that the operating effect of the multi-split air conditioner is influenced due to the fact that the occupied load of the new air blower is increased and the occupied amount of the refrigerant is increased after the new air blower adjusts the opening degree of the valve body under the control of the new.
A third aspect of the present invention provides a new blower for a multi-split air conditioning system, the new blower including: at least one heat exchange unit; the valve bodies correspond to the heat exchange units one by one and are used for controlling the flow of the refrigerant entering the heat exchange units; and the control panel is provided with a control system of the fresh air machine in any one of the technical schemes.
In this technical scheme, new fan has at least one heat transfer unit and with the at least one valve body of heat transfer unit one-to-one, when heat transfer unit's number was a plurality of, parallelly connected setting between two arbitrary heat transfer units, control panel is last to have the memory for the control system of the new fan of storage such as any one among the above-mentioned technical scheme, in order to control new fan, and then has the beneficial effect of any above-mentioned technical scheme, and it is here unnecessary a repeated description. Preferably, the number of the heat exchange units is two, and the number of the valve bodies is two.
A fourth aspect of the present invention provides a multi-split air conditioning system, including: the multi-split air conditioner comprises a multi-split air conditioner and a fresh air fan, wherein the fresh air fan is provided with a control system of the fresh air fan according to any one of the technical schemes.
In this technical scheme, since the multi-split air conditioning system has the multi-split air conditioner and the fresh air machine in the above technical scheme, and further has the beneficial effects of the above technical scheme, which are not described herein again.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a schematic flow chart of a control method of a fresh air machine of a first embodiment of the present invention;
fig. 2 shows a schematic flow chart of a control method of a fresh air machine of a second embodiment of the present invention;
fig. 3 shows a schematic flow chart of a control method of a fresh air machine of a third embodiment of the present invention;
fig. 4 shows a schematic flow chart of a control method of a fresh air machine of a fourth embodiment of the present invention;
fig. 5 shows a schematic flow chart of a control method of a fresh air machine of a fifth embodiment of the present invention;
fig. 6 shows a schematic flow chart of a control method of a fresh air machine of a sixth embodiment of the present invention;
fig. 7 shows a schematic flow chart of a control method of a fresh air machine of a seventh embodiment of the present invention;
FIG. 8 shows a schematic block diagram of a control system for a fresh air machine of a first embodiment of the present invention;
FIG. 9 shows a schematic block diagram of a control system for a fresh air machine according to a second embodiment of the present invention;
FIG. 10 shows a schematic block diagram of a control system for a fresh air machine of a third embodiment of the present invention;
FIG. 11 shows a schematic block diagram of a control system for a fresh air machine of a fourth embodiment of the present invention;
FIG. 12 shows a schematic block diagram of a control system for a fresh air machine of a fifth embodiment of the present invention;
FIG. 13 shows a schematic block diagram of a control system for a fresh air machine of a sixth embodiment of the present invention;
FIG. 14 shows a schematic block diagram of a control system for a fresh air machine of a seventh embodiment of the present invention;
fig. 15 shows a schematic diagram of a layout of a new fan according to an embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the names of the components in fig. 15 is:
12 heat exchange units (12a first heat exchange unit, 12b second heat exchange unit), 14 valve bodies (14a first valve body, 14b second valve body).
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Fig. 1 to 7 show schematic flowcharts of a control method of a fresh air machine according to an embodiment of the first aspect of the present invention.
As shown in fig. 1, a method for controlling a fresh air machine according to a first embodiment of the present invention includes:
step S102, acquiring a new air fan load and the total load of the multi-split air conditioning system when the system runs;
step S104, judging whether the ratio of the load of the fresh air fan to the total load is less than or equal to a preset value;
and S106, controlling the valve body to reduce the opening degree when the judgment result is negative.
In the embodiment, when the system operates, the proportion of the new fan load to the total load of the multi-split air-conditioning system is detected, the amount of the refrigerant occupied by the new fan can be reflected, and then when the proportion of the new fan load is large, namely the occupied amount of the refrigerant of the new fan is large, the valve body can be controlled in time to reduce the opening degree, the refrigerant flow entering the new fan is reduced, the refrigerant flow entering the indoor unit of the multi-split air-conditioning system is increased, the problem that the refrigeration or heating effect of other indoor units in the multi-split air-conditioning system is poor due to the fact that the new fan occupies too much refrigerant is effectively avoided, and user experience is improved. Preferably, the valve body is an electronic expansion valve.
As shown in fig. 2, a control method of a fresh air machine according to a second embodiment of the present invention includes:
step S202, acquiring a new air fan load and the total load of the multi-split air conditioning system when the system runs;
step S204, judging whether the ratio of the load of the fresh air fan to the total load is less than or equal to a preset value;
and step S206, when the judgment result is negative, controlling the valve body to reduce the opening degree.
In step S208, the timer is started, and after the first preset time is reached, the process returns to step S202.
In this embodiment, on one hand, after the opening of the valve body is reduced, the time for changing the load of the new fan is given by the first preset time, so that the situation that the load of the new fan is changed slightly in a short time after the opening of the valve body is reduced to cause a serious error between the load of the new fan under the opening and the acquired information under a normal condition and finally cause inaccurate opening control of the valve body to affect the operation effect of the new fan and the multi-split air-fuel-cell system is avoided, on the other hand, after the first preset time is reached, the load of the new fan and the total load are acquired again, and after the opening of the valve body is reduced, the change of the load of the new fan can be timely detected, so that whether the ratio of the load of the new fan to the total load occupied by the new fan at the current opening. In addition, since the time for judging and sending the control command is short, after the opening degree of the control valve body is reduced between the first preset times, the load of the fresh air machine and the total load of the multi-split air conditioning system are obtained again, which is also equal to that the steps S202 to S206 are directly repeated every interval of the first preset time, and the method belongs to the protection scope of the invention.
As shown in fig. 3, a method for controlling a fresh air machine according to a third embodiment of the present invention includes:
step S302, acquiring a new air fan load and the total load of the multi-split air conditioning system when the system runs;
step S304, judging whether the ratio of the load of the fresh air fan to the total load is less than or equal to a preset value;
step S306, when the judgment result is negative, calculating the times reaching the first preset time;
step S308, when the number of times reaching the first preset time is n, judging whether n +1 is less than or equal to the number m of the valve bodies;
step S310, when the judgment result is yes, controlling the (n + 1) th valve body in the at least two valve bodies to reduce the opening degree;
step S312, when the judgment result is negative, controlling the nth-mth valve body of the at least two valve bodies to be completely closed;
step S314, start timing, and return to step S302 after reaching the first preset time.
In this embodiment, the fresh air machine has at least two heat exchange units and at least two valve bodies corresponding to the heat exchange units one to one, any two heat exchange units of the at least two heat exchange units are connected in parallel, and when the ratio of the load of the fresh air machine to the total load is greater than a preset value, at this time, at least one valve body can be controlled to reduce the opening degree according to the sequence corresponding to the times of reaching the first preset time. For example, when the number of times of reaching the first preset time is zero, the first valve body of the at least two valve bodies can be controlled to reduce the opening degree, the first valve body is any one of the valve bodies, the valve bodies are numbered only for convenience of description, when the number of times of reaching the first preset time is one, the second valve body can be controlled to reduce the opening degree, the second valve body and the third valve body can be controlled to reduce the opening degree simultaneously, the first valve body can be controlled to be completely closed, and the opening degrees of the valve bodies can be controlled according to an appropriate sequence according to actual conditions. Through further refining the control of at least two valve bodies, the refrigerant requirement of the multi-split air conditioner can be met under the condition that the fresh air machine occupies as much refrigerant as possible, and the integral operation effect of the fresh air machine and the multi-split air conditioner is ensured at the same time.
As shown in fig. 4, a method for controlling a fresh air machine according to a fourth embodiment of the present invention includes:
step S402, acquiring a new air-handling machine load and the total load of the multi-split air-conditioning system when the system runs;
step S404, judging whether the ratio of the load of the fresh air fan to the total load is less than or equal to a preset value;
step S406, when the judgment result is negative, calculating the number n of times reaching the first preset time;
step S408, judging whether n is equal to 0;
step S410, when judging that n is equal to 0, judging whether at least two valve bodies are closed completely;
step S412, when judging that the at least two valve bodies are not completely closed or when n is not equal to 0, controlling at least one valve body to reduce the opening degree according to a preset sequence corresponding to the number n of times;
step S414, when judging that at least two valve bodies are closed completely, controlling the valve bodies to keep a closed state;
step S416, starting timing, and returning to the step S402 after reaching the first preset time;
and step S418, when n is not equal to 0 and the ratio of the load of the fresh air fan to the total load is less than or equal to a preset value, controlling the valve body to keep the current opening.
In this embodiment, after the opening degree of the control valve body is reduced, the load of the new fan and the total load are obtained again, whether the ratio of the load of the new fan to the total load is smaller than or equal to a preset value or not is judged again, and when the judgment result is yes, the opening degree of the valve body at the moment is maintained, so that the new fan continues to operate under the condition of the refrigerant inlet amount controlled by the valve body, and the operating state of the new fan and the multi-split air-conditioning system is met. Preferably, when an adjusting instruction sent by a user is received, the opening of the valve body is controlled according to a fresh air program, timing is started, when a fourth preset time is reached, the acquisition of the load of the fresh air machine and the total load of the multi-split air conditioning system is started, and the steps in any one of the technical schemes are executed to adjust the valve body.
As shown in fig. 5, a control method of a fresh air machine according to a fifth embodiment of the present invention includes:
step S502, acquiring a new air fan load and the total load of the multi-split air conditioning system when the system runs;
step S504, judge whether the new fan load is equal to the total load;
step S506, when the judgment result is yes, controlling the fresh air fan to continuously execute a fresh air program;
step S508, judging whether the ratio of the load of the fresh air fan to the total load is less than or equal to a preset value, and controlling the fresh air fan to continuously execute a fresh air program when the judgment result is yes;
and step S510, when the judgment result is negative, controlling the valve body to reduce the opening.
In the embodiment, after the load of the new air blower and the total load of the multi-split air conditioning system are obtained, whether the load of the new air blower is equal to the total load or not is also judged, when the load of the new air blower is equal to the total load, only the new air blower operates in the multi-split air conditioning system at the moment, the operation condition of the multi-split air conditioning system does not need to be managed, and the operation of the new air blower can be directly controlled according to a new air program.
As shown in fig. 6, a control method of a fresh air machine according to a sixth embodiment of the present invention includes:
step S602, acquiring a new air fan load and the total load of the multi-split air conditioning system when the system runs;
step S604, judging whether the load of the fresh air fan is equal to the total load;
step S606, when the judgment is yes, controlling the fresh air fan to continuously execute a fresh air program;
in step S608, the timer is started, and after the second preset time is reached, the process returns to step S602.
Step S610, judging whether the ratio of the load of the fresh air fan to the total load is less than or equal to a preset value, and returning to the step S606 when the judgment result is yes.
And step S612, when the judgment result is negative, controlling the valve body to reduce the opening degree.
In this embodiment, on the premise that the opening degree of the valve body is not controlled to be reduced, when it is determined that the ratio of the load of the new fan to the total load is smaller than or equal to the preset value for the first time, at this time, the opening degree of the valve body of the new fan directly meets the requirement of the amount of the refrigerant of the new fan and the multi-split air conditioner, and it is only required to control the operation of the new fan according to the new fan program. After the new fan is controlled to continue to execute the new fan program, timing is started, the new fan load and the total load of the multi-split air conditioning system are obtained again after the second preset time, whether the occupied amount of the refrigerant of the new fan is too large can be reflected at any time, so that the opening of the valve body can be adjusted in time, and the situation that the operation effect of the multi-split air conditioner is influenced due to the fact that the occupied load of the new fan is increased and the occupied refrigerant amount is increased after the new fan adjusts the opening of the valve body under the control of the new fan program is avoided.
As shown in fig. 7, a method for controlling a fresh air machine according to a seventh embodiment of the present invention includes:
step S702, acquiring a new air-handling unit load and a total load of the multi-split air-conditioning system when the system runs;
step S704, judging whether the load of the fresh air fan is equal to the total load;
step S706, when the judgment is yes, controlling the fresh air fan to continuously execute a fresh air program;
step S708, starting timing, and returning to step S702 after reaching a second preset time;
step S710, judging whether the ratio of the load of the fresh air fan to the total load is less than or equal to a preset value;
step S712, when the determination result is yes, determining whether the number of times of reaching the first preset time is equal to 0, and when the determination result is yes, executing step S706;
step 714, when the judgment result is negative, controlling the valve body to keep the current opening degree;
step S716, when the judgment result of judging whether the ratio of the load of the fresh air fan to the total load is less than or equal to the preset value is negative, calculating the times of reaching the first preset time;
step S718, determining whether the number of times of reaching the first preset time is equal to 0;
step S720, judging whether the at least two valve bodies are closed or not when the judgment result is negative;
step S722, when the at least two valve bodies are judged to be closed completely, controlling the valve bodies to keep a closed state;
step S724, when the at least two valve bodies are judged not to be completely closed or when the number of times reaching the first preset time is not equal to 0, controlling the at least one valve body to reduce the opening degree according to a preset sequence corresponding to the number of times n;
in step S726, timing is started, and after the first preset time is reached, the process returns to step S702.
In this embodiment, it should be noted that, because the time for determining, sending out the control command and calculating is very short, when the first preset time and the second preset time are equal or close to each other, it is directly set that the load and the total load of the new fan are obtained again every first preset time, and corresponding subsequent steps are performed, regardless of the states of the valve body and the new fan, which falls within the protection scope of the present invention.
Fig. 8 to 13 show schematic block diagrams of a control system of a fresh air machine according to an embodiment of the second aspect of the present invention.
As shown in fig. 8, a control system 100 for a fresh air machine according to a first embodiment of the present invention includes:
the acquiring unit 102 is configured to acquire a new air-handling unit load and a total load of the multi-split air-conditioning system when the system operates;
a first judging unit 104, configured to judge whether a ratio of the new fan load to the total load is less than or equal to a preset value;
and the first control unit 106 is used for controlling the valve body to reduce the opening degree when the judgment result is negative.
In the embodiment, when the system operates, the proportion of the new fan load to the total load of the multi-split air-conditioning system is detected, the amount of the refrigerant occupied by the new fan can be reflected, and then when the proportion of the new fan load is large, namely the occupied amount of the refrigerant of the new fan is large, the valve body can be controlled in time to reduce the opening degree, the refrigerant flow entering the new fan is reduced, the refrigerant flow entering the indoor unit of the multi-split air-conditioning system is increased, the problem that the refrigeration or heating effect of other indoor units in the multi-split air-conditioning system is poor due to the fact that the new fan occupies too much refrigerant is effectively avoided, and user experience is improved. Preferably, the valve body is an electronic expansion valve.
As shown in fig. 9, a control system 200 for a fresh air machine according to a second embodiment of the present invention includes:
the acquiring unit 202 is used for acquiring a new air-handling unit load and a total load of the multi-split air-conditioning system when the system runs;
a first judging unit 204, configured to judge whether a ratio of the new fan load to the total load is less than or equal to a preset value;
a first control unit 206 for controlling the valve body to decrease the opening degree when the judgment result is no;
and the first timing unit 208 is used for starting timing after the valve body is controlled to reduce the opening degree, and activating the acquisition unit 202 after the first preset time is reached.
In this embodiment, on one hand, after the opening of the valve body is reduced, the time for changing the load of the new fan is given by the first preset time, so that the situation that the load of the new fan is changed slightly in a short time after the opening of the valve body is reduced to cause a serious error between the load of the new fan under the opening and the acquired information under a normal condition and finally cause inaccurate opening control of the valve body to affect the operation effect of the new fan and the multi-split air-fuel-cell system is avoided, on the other hand, after the first preset time is reached, the load of the new fan and the total load are acquired again, and after the opening of the valve body is reduced, the change of the load of the new fan can be timely detected, so that whether the ratio of the load of the new fan to the total load occupied by the new fan at the current opening.
As shown in fig. 10, a control system 300 of a fresh air machine according to a third embodiment of the present invention includes:
an obtaining unit 302, configured to obtain a new air-handling unit load and a total load of the multi-split air-conditioning system when the system operates;
a first judging unit 304, configured to judge whether a ratio of the new fan load to the total load is less than or equal to a preset value;
the first control unit 306 is used for calculating the times of reaching the first preset time when the judgment result is negative; when the number of times reaching the first preset time is n, judging whether n +1 is less than or equal to the number m of the valve bodies; when the judgment result is yes, controlling the (n + 1) th valve body in the at least two valve bodies to reduce the opening degree; when the judgment result is negative, controlling the (n-m) th valve body of the at least two valve bodies to be completely closed;
and the first timing unit 308 is used for starting timing after the control valve body reduces the opening degree, and activating the acquisition unit 302 after a first preset time is reached.
In this embodiment, the fresh air machine has at least two heat exchange units and at least two valve bodies corresponding to the heat exchange units one to one, any two heat exchange units of the at least two heat exchange units are connected in parallel, and when the ratio of the load of the fresh air machine to the total load is greater than a preset value, at this time, at least one valve body can be controlled to reduce the opening degree according to the sequence corresponding to the times of reaching the first preset time. For example, when the number of times of reaching the first preset time is zero, the first valve body of the at least two valve bodies can be controlled to reduce the opening degree, the first valve body is any one of the valve bodies, the valve bodies are numbered only for convenience of description, when the number of times of reaching the first preset time is one, the second valve body can be controlled to reduce the opening degree, the second valve body and the third valve body can be controlled to reduce the opening degree simultaneously, the first valve body can be controlled to be completely closed, and the opening degrees of the valve bodies can be controlled according to an appropriate sequence according to actual conditions. Through further refining the control of at least two valve bodies, the refrigerant requirement of the multi-split air conditioner can be met under the condition that the fresh air machine occupies as much refrigerant as possible, and the integral operation effect of the fresh air machine and the multi-split air conditioner is ensured at the same time.
As shown in fig. 11, a control system 400 of a fresh air machine according to a fourth embodiment of the present invention includes:
an obtaining unit 402, configured to obtain a new air-handling unit load and a total load of the multi-split air-conditioning system when the system operates;
a first judging unit 404, configured to judge whether a ratio of the new fan load to the total load is smaller than or equal to a preset value;
a first control unit 410, configured to calculate, when the determination result is negative, the number of times of reaching a first preset time;
a second judging unit 406, configured to judge whether all of the at least two valve bodies are closed when the ratio of the load of the fresh air fan to the total load is judged to be greater than the preset value and when the number of times of reaching the first preset time is zero;
a fourth control unit 416, configured to control at least one valve body to decrease the opening degree according to a preset sequence corresponding to the times when it is determined that the at least two valve bodies are not completely closed or when the times reaching the first preset time are not equal to 0;
a third control unit 414 for controlling the valve body to maintain a closed state when it is judged that at least two valve bodies are all closed;
the first timing unit 408 is used for starting timing after the valve body is controlled to reduce the opening degree, and activating the obtaining unit 402 after a first preset time is reached;
and a second control unit 412, configured to control the valve body to maintain the current opening degree when the number of times of reaching the first preset time is not equal to 0 and when a ratio of the load of the new fan to the total load is less than or equal to a preset value.
In this embodiment, after the opening degree of the control valve body is reduced, the load of the new fan and the total load are obtained again, whether the ratio of the load of the new fan to the total load is smaller than or equal to a preset value or not is judged again, and when the judgment result is yes, the opening degree of the valve body at the moment is maintained, so that the new fan continues to operate under the condition of the refrigerant inlet amount controlled by the valve body, and the operating state of the new fan and the multi-split air-conditioning system is met. It should be noted that the first determining unit 404 and the second determining unit 406 may be one determining unit, and the first controlling unit 410 to the fourth controlling unit 416 may also be one controlling unit.
As shown in fig. 12, a control system 500 of a fresh air machine according to a fifth embodiment of the present invention includes:
an obtaining unit 502, configured to obtain a new air-handling unit load and a total load of the multi-split air-conditioning system when the system operates;
a third judging unit 506, configured to judge whether the new fan load is equal to the total load;
a fifth control unit 510, configured to control the fresh air fan to continue to execute the fresh air program when the determination is yes;
a first judging unit 504, configured to judge whether a ratio of the new fan load to the total load is less than or equal to a preset value;
the first control unit 508 is configured to control the fresh air fan to continue to execute the fresh air program when the determination result is yes; and when the judgment result is negative, controlling the valve body to reduce the opening.
In this embodiment, after acquiring the new air blower load and the total load of the multi-split air conditioning system, it is also determined whether the new air blower load is equal to the total load, when the new air blower load is equal to the total load, only the new air blower is in operation in the multi-split air conditioning system at this time, and further the operation condition of the multi-split air conditioning system does not need to be managed, and the operation of the new air blower can be directly controlled according to a new air program, wherein it is determined whether the new air blower load is equal to the total load first, and then it is determined whether the ratio of the new air blower load to the total load is less than or. In addition, the first judging unit 504 and the third judging unit 506 may be one judging unit, and the first control unit 508 and the fifth control unit 510 may be one control unit.
As shown in fig. 13, a control system 600 of a fresh air machine according to a sixth embodiment of the present invention includes:
an obtaining unit 602, configured to obtain a new air-handling unit load and a total load of the multi-split air-conditioning system when the system operates;
a third judging unit 606, configured to judge whether the new fan load is equal to the total load;
a fifth control unit 610, configured to control the fresh air fan to continue to execute the fresh air program when the third determining unit 606 determines that the fresh air program is executed;
the second timing unit 612 is configured to start timing after the fresh air fan continues to execute the fresh air program, and activate the obtaining unit 602 after a second preset time is reached.
A first judging unit 604, configured to judge whether a ratio of the new fan load to the total load is less than or equal to a preset value;
the first control unit 608 is configured to control the fresh air machine to continue to execute the fresh air program and activate the second timing unit when the determination result is yes; and when the judgment result is negative, controlling the valve body to reduce the opening.
In this embodiment, on the premise that the opening degree of the valve body is not controlled to be reduced, when it is determined that the ratio of the load of the new fan to the total load is smaller than or equal to the preset value for the first time, at this time, the opening degree of the valve body of the new fan directly meets the requirement of the amount of the refrigerant of the new fan and the multi-split air conditioner, and it is only required to control the operation of the new fan according to the new fan program. After the new fan is controlled to continue to execute the new fan program, timing is started, the new fan load and the total load of the multi-split air conditioning system are obtained again after the second preset time, whether the occupied amount of the refrigerant of the new fan is too large can be reflected at any time, so that the opening of the valve body can be adjusted in time, and the situation that the operation effect of the multi-split air conditioner is influenced due to the fact that the occupied load of the new fan is increased and the occupied refrigerant amount is increased after the new fan adjusts the opening of the valve body under the control of the new fan program is avoided.
As shown in fig. 14, a control system 700 for a fresh air machine according to a seventh embodiment of the present invention includes:
an obtaining unit 702, configured to obtain a new air-handling unit load and a total load of the multi-split air-conditioning system when the system operates;
a third determining unit 708, configured to determine whether the new fan load is equal to the total load;
a fifth control unit 722, configured to control the fresh air fan to continue to execute the fresh air program when the determination is yes;
a second timing unit 712, configured to start timing after the fresh air fan continues to execute the fresh air program, and activate the obtaining unit 702 after a second preset time is reached;
a first judging unit 704, configured to judge whether a ratio of the new fan load to the total load is less than or equal to a preset value;
the first control unit 714 is configured to, when the number of times reaching the first preset time is zero, and when the determination result is yes, control the fresh air machine to continue to execute the fresh air program, and activate the second timing unit 712;
the second control unit 716 is used for controlling the valve body to keep the current opening degree when the judgment result of judging whether the ratio of the load of the fresh air fan to the total load is smaller than or equal to the preset value is yes;
the first control unit 714 is further configured to calculate the number of times of reaching the first preset time when the determination result that whether the ratio of the new fan load to the total load is smaller than or equal to the preset value is negative;
the second judging unit 706 is used for judging whether the at least two valve bodies are completely closed or not when the judgment result that whether the times of reaching the first preset time is equal to 0 is judged to be negative;
a third control unit 718 for controlling the valve bodies to maintain the closed state when it is judged that at least two valve bodies are all closed;
a fourth control unit 720, configured to control at least one valve body to decrease the opening degree according to a preset sequence corresponding to the number n when it is determined that the at least two valve bodies are not all closed or when the number of times reaching the first preset time is not equal to 0;
the first timing unit 710 is configured to start timing after controlling the at least one valve body to reduce the opening degree, and activate the obtaining unit 702 after reaching a first preset time.
As shown in fig. 15, a third aspect of the present invention provides a new blower for a multi-split air conditioning system, the new blower including: a fresh air machine control system as claimed in any preceding embodiment.
In this embodiment, the new fan has at least one heat exchange unit 12 and at least one valve body 14 with heat exchange unit 12 one-to-one, when heat exchange unit 12's number is a plurality of, parallelly connected setting between two arbitrary heat exchange units 12, the last memory that has of control panel for the control system of the new fan of storage such as any one among the above-mentioned technical scheme, in order to control new fan, and then have the beneficial effect of any one above-mentioned technical scheme, and it is unnecessary here to describe repeatedly. Preferably, the number of the heat exchange units 12 is two, and the number of the heat exchange units is the first heat exchange unit 12a and the second heat exchange unit 12b, and the number of the valve bodies 14 is two, and the number of the valve bodies is the first valve body 14a and the second valve body 14 b. In addition, the first timing unit 710 and the second timing unit 712 may be a timing unit, the first control unit 714 to the fifth control unit 722 may be a control unit, and the first determining unit 704 to the third determining unit 708 may be a determining unit.
A fourth aspect of the present invention provides a multi-split air conditioning system, including: the multi-split air conditioner comprises a multi-split air conditioner and a fresh air machine, wherein the fresh air machine is provided with a control system of the fresh air machine in any one of the above embodiments.
In this embodiment, since the multi-split air conditioning system has the multi-split air conditioner and the fresh air machine in the above technical solution, the beneficial effects of the above embodiments are further achieved, and details are not repeated herein.
An embodiment of a fifth aspect of the present invention provides a computer device, which includes a memory, a processor and a computer program stored in the memory and being executable on the processor, wherein the processor is configured to execute the steps of the control method of the fresh air machine according to any one of the above embodiments.
A sixth aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored, wherein the computer program, when being executed by a processor, implements the steps of the control method for a new wind turbine according to any one of the foregoing embodiments.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (14)
1. A control method of a fresh air machine is disclosed, the fresh air machine is used for a multi-split air conditioning system, the fresh air machine is provided with a heat exchange unit and a valve body for controlling the flow of a refrigerant entering the heat exchange unit, and the control method is characterized by comprising the following steps:
when the system runs, acquiring the load of a fresh air machine and the total load of the multi-split air conditioning system;
judging whether the ratio of the new fan load to the total load is less than or equal to a preset value;
when the judgment result is negative, controlling the valve body to reduce the opening degree;
after the controlling the valve body to reduce the opening degree, the method further comprises the following steps:
and starting timing, and returning to execute the acquisition of the load of the fresh air fan and the total load of the multi-split air conditioning system after the first preset time is reached.
2. The fresh air machine control method according to claim 1, wherein the fresh air machine has at least two heat exchange units and at least two valve bodies, the valve bodies correspond to the heat exchange units one to one, any two heat exchange units in the at least two heat exchange units are connected in parallel, and the controlling of the valve bodies to reduce the opening specifically includes:
calculating the times of reaching the first preset time;
and controlling at least one valve body to reduce the opening degree according to a preset sequence corresponding to the times.
3. The method for controlling the fresh air machine according to claim 2, further comprising, after the controlling the valve body to reduce the opening degree:
when the ratio of the new fan load to the total load is judged to be smaller than or equal to a preset value, controlling the valve body to keep the current opening;
when the ratio of the new fan load to the total load is judged to be larger than a preset value, whether the at least two valve bodies are closed or not is judged;
when the at least two valve bodies are judged to be completely closed, controlling the valve bodies to keep a closed state;
and when judging that the at least two valve bodies are not completely closed, executing the control of the valve bodies to reduce the opening degree.
4. The method for controlling the fresh air machine according to claim 1, further comprising, after the obtaining of the fresh air machine load and the total load of the multi-split air conditioning system:
and judging whether the new fan load is equal to the total load, and controlling the new fan to continuously execute a new fan program when the new fan load is equal to the total load.
5. The method of controlling a fresh air machine according to claim 1,
and when the ratio of the new fan load to the total load is judged to be less than or equal to a preset value, controlling the new fan to continuously execute a new fan program.
6. The method for controlling the fresh air machine according to claim 4 or 5, further comprising, after the controlling the fresh air machine to continue to execute a fresh air program:
and starting timing, and returning to execute the acquisition of the load of the fresh air fan and the total load of the multi-split air conditioning system after reaching a second preset time.
7. The utility model provides a control system of new fan, new fan is used for many online air conditioning system, new fan has heat transfer unit and the valve body of the refrigerant flow that control got into heat transfer unit, its characterized in that includes:
the acquiring unit is used for acquiring a new air fan load and the total load of the multi-split air conditioning system when the system runs;
the first judging unit is used for judging whether the ratio of the new fan load to the total load is less than or equal to a preset value;
the first control unit is used for controlling the valve body to reduce the opening degree when the judgment result is negative;
and the first timing unit is used for starting timing after the control unit is activated and activating the acquisition unit after first preset time is reached.
8. The control system of the fresh air machine according to claim 7, wherein the fresh air machine is provided with at least two heat exchange units and at least two valve bodies, the valve bodies correspond to the heat exchange units one by one, and any two heat exchange units in the at least two heat exchange units are connected in parallel;
the first control unit is specifically configured to: calculating the times of reaching the first preset time; and controlling at least one valve body to reduce the opening degree according to a preset sequence corresponding to the times.
9. The control system of the new fan of claim 8, further comprising:
the second control unit is used for controlling the valve body to keep the current opening degree when the ratio of the new fan load to the total load is judged to be smaller than or equal to a preset value;
the second judging unit is used for judging whether the at least two valve bodies are closed or not when the ratio of the new fan load to the total load is judged to be larger than a preset value;
the third control unit is used for controlling the valve bodies to keep a closed state when the at least two valve bodies are judged to be closed completely;
and the fourth control unit executes the control of the valve body to reduce the opening degree when judging that the at least two valve bodies are not completely closed.
10. The control system of the new fan as claimed in claim 7, further comprising:
a third judging unit, configured to judge whether the new fan load is equal to the total load;
and the fifth control unit is used for controlling the fresh air fan to continuously execute the fresh air program when the third judgment unit judges that the fresh air fan is in the positive state.
11. The control system of the new fan as claimed in claim 7,
and the first control unit is also used for controlling the new fan to continuously execute a new air program when the ratio of the new fan load to the total load is judged to be less than or equal to a preset value.
12. The control system of the new fan according to claim 10 or 11, further comprising:
and the second timing unit is used for starting timing after the fresh air fan continues to execute the fresh air program and activating the acquisition unit after second preset time is reached.
13. The utility model provides a new fan, new fan is used for many online air conditioning system, its characterized in that, new fan includes:
at least one heat exchange unit;
the valve bodies correspond to the heat exchange units one by one and are used for controlling the flow of the refrigerant entering the heat exchange units; and
a control panel provided with a control system of the new fan as claimed in any one of claims 7 to 12.
14. A multi-split air conditioning system, comprising:
a multi-split air conditioner and a fresh air machine as claimed in claim 13.
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| CN201711008867.1A CN107726567B (en) | 2017-10-25 | 2017-10-25 | Control method and system of fresh air machine, fresh air machine and multi-split air conditioning system |
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| CN201711008867.1A CN107726567B (en) | 2017-10-25 | 2017-10-25 | Control method and system of fresh air machine, fresh air machine and multi-split air conditioning system |
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| CN107726567A CN107726567A (en) | 2018-02-23 |
| CN107726567B true CN107726567B (en) | 2020-10-30 |
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| CN108954712B (en) * | 2018-07-23 | 2020-12-18 | 广东美的暖通设备有限公司 | Control method and control system of air conditioner and air conditioner |
| CN109237704B (en) * | 2018-08-20 | 2021-09-21 | 青岛海尔空调电子有限公司 | Control method for multi-split air conditioning system |
| CN112781200B (en) * | 2019-11-01 | 2022-11-22 | 广东美的制冷设备有限公司 | Wall-penetrating type air conditioner, control method and device thereof and readable storage medium |
| CN111121153B (en) * | 2019-12-20 | 2021-10-22 | 宁波奥克斯电气股份有限公司 | Multi-connected indoor unit and fresh air fan hybrid system and control method thereof |
| CN111121152B (en) * | 2019-12-20 | 2021-07-06 | 宁波奥克斯电气股份有限公司 | Multi-connected outdoor unit and fresh air fan mixed connection system and control method thereof |
| CN111561770B (en) * | 2020-05-21 | 2021-09-21 | 广东美的暖通设备有限公司 | Fresh air system, control method thereof and computer-readable storage medium |
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