CN113108428A - Multi-split central air conditioning system and control method thereof - Google Patents
Multi-split central air conditioning system and control method thereof Download PDFInfo
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- CN113108428A CN113108428A CN202110396887.0A CN202110396887A CN113108428A CN 113108428 A CN113108428 A CN 113108428A CN 202110396887 A CN202110396887 A CN 202110396887A CN 113108428 A CN113108428 A CN 113108428A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention discloses a multi-split central air conditioning system which comprises a compressor unit, a cold control electromagnetic valve, a hot control electromagnetic valve, a first condensation pipe group, a second condensation pipe group, a fan, a control circuit and a plurality of evaporator groups, wherein the compressor unit is connected with the cold control electromagnetic valve; the output end of the compressor unit is communicated with the input end of the cold control electromagnetic valve, the output end of the cold control electromagnetic valve is communicated with a first condensation pipe group, the first condensation pipe group is communicated with an evaporator group, the evaporator group is communicated with the inlet of the cold control electromagnetic valve, and the outlet of the cold control electromagnetic valve is communicated with the input end of the compressor unit; the input end of the thermal control electromagnetic valve is communicated with the input end of the cold control electromagnetic valve, the output end of the thermal control electromagnetic valve is communicated with the evaporator group, the evaporator group is communicated with the second condensation pipe group, the second condensation pipe group is communicated with the inlet of the thermal control electromagnetic valve, and the outlet of the thermal control electromagnetic valve is communicated with the input end of the compressor unit. By adopting the arrangement, the refrigeration function of part of the indoor air conditioners can be realized, the heating function of part of the indoor air conditioners can be realized, and the beneficial effect of improving the scene applicability can be realized.
Description
Technical Field
The invention relates to the technical field of central air conditioners, in particular to a multi-split central air conditioning system and a control method thereof.
Background
The multi-split central air conditioner is a type of central air conditioner for users, and is also called as 'one-driving-more' and refers to a primary refrigerant air conditioning system in which one outdoor unit is connected with two or more indoor units through a pipe, the outdoor side adopts an air cooling heat exchange mode, and the indoor side adopts a direct evaporation heat exchange mode. The multi-split system is widely applied to small and medium-sized buildings and part of public buildings at present. Most of the existing central air conditioners can realize the functions of cooling and heating, and the working state of the central air conditioner is judged to be heating when the regulated temperature is above 25 ℃; when the adjusted temperature is below 25 ℃, the working state of the central air conditioner is judged as cooling.
The central air conditioner generates high-temperature and high-pressure refrigerant in a refrigeration working state, usually under the working of a compressor, the refrigerant is discharged into a condensation pipe, the condensation pipe is cooled by air under a fan, the refrigerant passing through the condensation pipe is reduced at the same time, then the refrigerant with the reduced temperature is selectively discharged into a room, and the effect of discharging cold air into the room is achieved by utilizing the blowing or exhausting effect of an indoor air conditioner, and finally the refrigerant flows back into the compressor to form a working cycle so as to achieve the refrigeration effect; on the contrary, when the central air conditioner needs to heat, the circulation direction of the refrigerant is reversed to the circulation direction of the refrigerant in the refrigeration process under the operation of the compressor, so that the heating function can be achieved. The working principle of the existing multi-split central air conditioner is basically consistent with the principle, and the main difference is that the outdoor unit is one unified, and the number of indoor air conditioners is multiple.
In some special use environments, such as communication machine rooms, laboratories, large machine rooms, fresh food rooms, medicine rooms and the like, the communication machine rooms, the laboratories, the large machine rooms, the fresh food rooms, the medicine rooms and the like are required to be in constant-temperature and low-temperature environments for a long time; similarly, some plant cultivation rooms and laboratories need to be in a constant-temperature high-temperature environment for a long time. For the scenes needing to be in a specific temperature environment for a long time, the existing multi-split air conditioner usually can only realize the cooling or heating function in a unified way, but is difficult to realize the cooling of part of indoor air conditioners, and the heating function of the other part of indoor air conditioners. Therefore, although the multi-split central air conditioner can achieve the effects of improving efficiency and saving energy to a certain extent, the multi-split central air conditioner cannot realize the functions of cooling and heating at the same time, and has the problem of low applicability.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a multi-split central air-conditioning system and a control method thereof, which can simultaneously realize the functions of refrigerating part of indoor air conditioners and heating part of other indoor air conditioners so as to improve the beneficial effect of scene applicability.
The purpose of the invention is realized by the following technical scheme:
a multi-split central air-conditioning system comprises a compressor unit, a cold control electromagnetic valve, a hot control electromagnetic valve, a first condensation pipe group, a second condensation pipe group, a control circuit and a plurality of evaporator groups;
the output end of the compressor unit is communicated with the input end of the cold control electromagnetic valve, the output end of the cold control electromagnetic valve is communicated with the first condensation pipe group, the other end of the first condensation pipe group is communicated with the evaporator group, the other end of the evaporator group is communicated with the return inlet of the cold control electromagnetic valve, and the return outlet of the cold control electromagnetic valve is communicated with the input end of the compressor unit;
the input end of the thermal control electromagnetic valve is communicated with the input end of the cold control electromagnetic valve, the output end of the thermal control electromagnetic valve is communicated with the evaporator group, the evaporator group is communicated with the second condensation pipe group, the other end of the second condensation pipe group is communicated with the backflow inlet of the thermal control electromagnetic valve, and the backflow outlet of the thermal control electromagnetic valve is communicated with the input end of the compressor unit;
a filtering piece is connected between the evaporator group and the first and second condensation tube groups;
and the compressor unit, the cold control electromagnetic valve and the hot control electromagnetic valve are all connected with the control circuit.
Further, the filter element includes a dry filter.
Further, the number of the filtering pieces connected in series between the evaporator group and the first condensation tube group and between the evaporator group and the second condensation tube group is even, each filtering piece further comprises a one-way valve and a capillary tube, each capillary tube is connected with the drying filter, the one-way valves are connected with the capillary tubes and the drying filter in parallel, the flow directions of the one-way valves of the adjacent filtering pieces are opposite, and the flow direction of the one-way valve close to the evaporator group flows in a direction deviating from the evaporator group.
Further, a piston electromagnetic valve is connected between the input end of the cold control electromagnetic valve and the input end of the hot control electromagnetic valve, the piston electromagnetic valve comprises a first valve body, the first valve body is provided with a straight hole communicated with the output end of the compressor unit, the outer peripheral surface of the valve body is provided with two through holes respectively communicated with the cold control electromagnetic valve and the hot control electromagnetic valve, the through holes are communicated with the straight hole, a rotating block is rotatably connected in the straight hole, the two through holes are positioned on the same plane relative to the rotating shaft of the rotating block, the straight hole is opposite to the rotating block, the end surface of the rotating block facing the straight hole is provided with a straight groove communicated with the straight hole, the outer peripheral surface of the rotating block is provided with two connecting holes corresponding to the two rotating blocks, the connecting holes are communicated with the straight groove, and the first valve body is provided with a rotating member for driving the rotating block to rotate, the rotating piece is connected with the control circuit.
Further, reversing electromagnetic valves are connected among the evaporator group, the cold control electromagnetic valve and the hot control electromagnetic valve, and among the evaporator group, the first condensation pipe and the second condensation pipe, each reversing electromagnetic valve comprises a second valve body, a valve hole communicated with the evaporator group is formed in the second valve body, two reversing holes are formed in the outer peripheral surface of the second valve body, the reversing holes are communicated with the valve hole, springs are arranged in the reversing holes, one ends, close to the valve hole, of the two springs are fixedly connected with the same valve ball, and two ends of each spring are connected with the control circuit.
Further, a blowing fan is arranged on one side of the evaporator group, and an inlet of the blowing fan is opposite to the evaporator group.
Further, the first condensation pipe group and the second condensation pipe group are arranged side by side, fans are arranged on two opposite sides of the first condensation pipe and the second condensation pipe, the wind directions of the fans are consistent, the wind direction of the fan close to the machine case is towards the first condensation pipe group and the second condensation pipe group, and the wind direction of the fan close to the machine case is towards the machine case.
Further, the cold control electromagnetic valve output end, the hot control electromagnetic valve output end, the first condensation pipe group and the second condensation pipe group are all communicated with an adjusting joint, a containing cavity is formed in the adjusting joint, a plurality of connectors for detachably connecting the evaporator group are arranged outside the adjusting joint, the connectors are communicated with the inside of the containing cavity, and the connectors are in threaded connection with end covers.
Further, the control circuit comprises an outdoor control circuit and an indoor control circuit, the indoor control circuit is connected with the outdoor control circuit through a wireless module, the compressor unit, the cold control electromagnetic valve, the hot control electromagnetic valve, the piston electromagnetic valve and the fan are all connected with the outdoor control circuit, the indoor control circuit is connected with a control button for adjusting temperature, and the reversing electromagnetic valve is connected with the indoor control circuit.
Further, the indoor control circuit is connected with a temperature sensor, and the temperature regulation tolerance value of the temperature sensor is +/-0.8 ℃.
A control method of a multi-split central air-conditioning system comprises the following steps:
the first step is as follows: temperature adjustment selection: adjusting a control knob of the indoor control circuit to select an adjusted temperature;
the second step is that: judging the regulating quantity of the evaporator: when the number of the temperature of the evaporator group is one, starting the multi-split central air conditioner to regulate the temperature according to the selected temperature regulation condition; when the number of the temperature of the evaporator groups is multiple, judging whether the temperature regulation requirements of the evaporator groups needing temperature regulation are consistent, if so, starting the multi-split central air conditioner to regulate the temperature according to the specified temperature regulation condition; if not, entering the next step;
the third step: starting a refrigeration and heating parallel regulation mode: the compressor unit, the cold control electromagnetic valve, the hot control electromagnetic valve, the fan and the piston electromagnetic valve are started to work by using the outdoor control circuit, the piston electromagnetic valve drives the rotating piece to drive the rotating block to rotate under the control action of the outdoor control circuit, and the two connecting holes in the rotating block are in direct opposite communication with the two through holes in the first valve body, so that high-temperature and high-pressure refrigerant generated by the compressor unit is driven to be discharged into the cold control electromagnetic valve and the hot control electromagnetic valve;
the fourth step: controlling the temperature control state according to the temperature required by the indoor evaporator: when the adjusting temperature of a control knob of the indoor control circuit is less than or equal to 25 ℃, the indoor control circuit leads current with the same direction to two ends of a spring close to one side of the thermal control electromagnetic valve so as to drive a valve ball in the reversing electromagnetic valve to seal a reversing hole close to one side of the thermal control electromagnetic valve; and conversely, when the adjusting temperature of the control knob of the indoor control circuit is higher than 25 ℃, the indoor control circuit applies current with the same direction to the two ends of the spring close to one side of the cold control electromagnetic valve so as to drive a valve ball in the reversing electromagnetic valve to seal the reversing hole close to one side of the cold control electromagnetic valve.
The invention has the following beneficial effects:
1. a multi-connected central air-conditioning system, when the indoor evaporator group needs to refrigerate, utilize the compressor group to compress low-temperature low-pressure liquid refrigerant, can produce the gaseous refrigerant of high-temperature high-pressure, then enter the input end of the cold control electromagnetic valve, and then discharge into the first condensation tube bank from the output end of the cold control electromagnetic valve, after the cooling effect of the first condensation tube bank, form the liquid refrigerant of low-temperature high-pressure, and then discharge into the coil pipe of the corresponding evaporator group, utilize the control circuit to start the heating wire to generate heat, when the liquid refrigerant of low-temperature high-pressure enters the evaporator group, the evaporator group evaporates the vaporization to the refrigerant of low-temperature high-pressure, the evaporator group absorbs heat to the ambient air in this process, to reaching the effect of cooling the ambient environment; the low-temperature high-pressure liquid refrigerant forms low-temperature low-pressure vapor refrigerant after heat exchange of the evaporator group, finally flows back to the backflow inlet of the cold control electromagnetic valve, and then flows back to the backflow outlet of the smart control electromagnetic valve to be discharged into the input end of the compressor unit, so that cyclic utilization is realized. When the indoor evaporator group needs to heat, after the compressor group is utilized to compress the low-temperature low-pressure liquid refrigerant, high-temperature high-pressure gaseous refrigerant is generated and then enters the input end of the thermal control electromagnetic valve, and then is discharged into the coil pipe of the evaporator group from the output end of the thermal control electromagnetic valve, the overheated high-temperature high-pressure gaseous refrigerant is radiated after passing through the evaporator group to radiate heat, so as to achieve the effect of heating the environment around the evaporator, the refrigerant after heat exchange is changed into the low-temperature high-pressure liquid refrigerant and then enters the second condensation pipe group, the low-temperature high-pressure liquid refrigerant completes the vaporization process in the second condensation pipe group, the refrigerant liquid absorbs a large amount of heat to the outside and is changed into gaseous state again, so as to be convenient for cooling an outdoor unit, and after the low-temperature low-pressure gaseous refrigerant discharged by the second condensation pipe group flows, and the mixture is discharged from a backflow outlet to the input end of the compressor, so that the recycling is realized.
2. On the basis of the structure of the existing multi-split central air conditioner, the traditional four-way electromagnetic valve is replaced by a cold control electromagnetic valve and a heat control electromagnetic valve which are mutually independent, and meanwhile, the traditional single condensation pipe system is replaced by two first condensation pipe groups and two second condensation pipe groups which are mutually independent, so that a compressor-a cold control electromagnetic valve-an evaporator group-a first condensation pipe group-a cold control electromagnetic valve-a compressor group forms a complete refrigeration loop, and a compressor-a heat control electromagnetic valve-an evaporator group-a second condensation pipe group-a heat control electromagnetic valve-a compressor group forms a complete heating loop, wherein the compressor group and the evaporator group belong to a common device, and the refrigeration and heating states of the evaporator group can be selected to be matched with the cold control electromagnetic valve, the heat control electromagnetic valve and the compressor group through the, The first condensation pipe group and the second condensation pipe group are in an on-off state. Therefore, the multi-split central air conditioner has the beneficial characteristics that the multi-split central air conditioner has the advantages that the refrigeration of part of indoor evaporator units (air conditioners) is realized, and the heating of other part of indoor evaporator units (air conditioners) is realized, so that the use requirements of different scenes are met, the functions of using different external environments are realized, and the use diversity of the multi-split central air conditioner is improved.
3. The control method can realize the functions of synchronously cooling and heating a plurality of areas by the multi-split central air-conditioning system according to the temperature regulation requirement, or synchronously cooling a local area and heating other required areas. The beneficial effects of the refrigeration and heating parallel use of the multi-split central air conditioner can be enriched, so that the effect of enriching the use of users according to the appointed requirements is achieved, and the beneficial effects of saving energy and improving the refrigeration and heating efficiency can be realized.
Drawings
Fig. 1 is a schematic view illustrating the connection of the overall structure of a multi-split central air conditioning system.
Fig. 2 is a schematic view of the structural connection of the refrigerating part of the multi-split central air-conditioning system.
Fig. 3 is a schematic view of the overall structure of the piston solenoid valve.
Fig. 4 is a sectional view of the piston solenoid valve.
Fig. 5 is a schematic diagram of the overall structure of the reversing solenoid valve.
FIG. 6 is a cross-sectional view of the reversing solenoid valve.
Fig. 7 is a schematic view of the overall structure of the adjusting joint.
Fig. 8 is a cross-sectional view of the adjustment joint.
In the figure: 1. a compressor unit; 2. a cold control electromagnetic valve; 3. a thermally controlled solenoid valve; 4. a piston solenoid valve; 41. a first valve body; 42. a straight hole; 43. a through hole; 44. rotating the block; 441. a straight groove; 442. connecting holes; 45. a motor; 51. a first bank of condenser tubes; 52. a second bank of condensing tubes; 53. a fan; 6. a filter member; 61. a one-way valve; 62. drying the filter; 63. a capillary tube; 7. adjusting the joint; 71. a cavity; 72. a connector; 73. an end cap; 8. a reversing solenoid valve; 81. a second valve body; 82. a valve bore; 83. a reversing hole; 84. a spring; 85. a valve ball; 9. an evaporator group; 91. a coil pipe; 92. an air blowing fan.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments. In the present specification, the terms "upper", "inner", "middle", "left", "right" and "one" are used for clarity of description only, and are not used to limit the scope of the present invention, and the relative relationship between the terms and the modifications may be regarded as the scope of the present invention without substantial technical changes.
Referring to fig. 1 to 8, a multi-split central air conditioning system is characterized in that: the system comprises a compressor unit 1, a cold control electromagnetic valve 2, a hot control electromagnetic valve 3, a first condensation tube group 51, a second condensation tube group 52, a control circuit and a plurality of evaporator groups 9.
The number of the compressor units 1 in this embodiment is multiple, and the compressor units are used for compressing original low-temperature low-pressure refrigerant gas into high-temperature high-pressure superheated steam, discharging the superheated steam from the output end of the compressor unit 1, and simultaneously facilitating that low-temperature low-pressure refrigerant formed after condensation and cooling flows back to the input end of the compressor unit 1 to be compressed again, thereby completing the refrigeration cycle; the compressor unit 1, the cold control electromagnetic valve 2 and the hot control electromagnetic valve 3 are all connected with a control circuit.
The cold control electromagnetic valve 2 and the hot control electromagnetic valve 3 are four-way electromagnetic valves, and two straight-through channels are formed inside the cold control electromagnetic valve and the hot control electromagnetic valve, so that the connecting distance of pipelines is shortened, and the circulation and transmission functions of liquid and gaseous fluids can be realized;
the first and second condenser tube banks 51 and 52 are used for cooling only the high-temperature high-pressure gaseous or liquid substance or the high-temperature low-pressure gaseous or liquid substance generated in the evaporator bank 9 or the compressor.
The evaporator group 9, the evaporator group 9 includes the coil 91 for the gas or liquid to pass through, according to the principle of relative temperature difference, thus achieve the function of evaporation and heating; in the refrigeration process, the evaporator is used for absorbing heat and vaporizing the low-temperature and low-pressure liquid refrigerant generated by the first condensation tube group 51 to generate a low-temperature and low-pressure liquid gaseous refrigerant so as to reduce the temperature of the air around the evaporator group 9, thereby achieving the effect of reducing the temperature;
the evaporator group 9 comprises a coil 91 for gas or liquid to pass through, and is used for absorbing heat of a high-temperature high-pressure gaseous refrigerant generated by the compressor and then radiating the heat outwards in the heating process to generate a low-temperature high-pressure liquid refrigerant, so that the evaporator group 9 radiates heat outwards to achieve the effect of temperature rise;
and the control circuit is used for controlling the temperature regulation state of the indoor evaporator and simultaneously controlling the working states of the cold control electromagnetic valve 2 and the hot control electromagnetic valve 3.
The output of compressor unit 1 passes through the pipeline and communicates with the input of cold-control solenoid valve 2, and the output of cold-control solenoid valve 2 passes through the pipeline and communicates with first condenser bank of tubes 51, and the other end of first condenser bank of tubes 51 passes through the pipeline and communicates with evaporator group 9, and the other end of evaporator group 9 passes through the return inlet intercommunication of pipeline and cold-control solenoid valve 2, and the outlet of flow backward of cold-control solenoid valve 2 passes through the pipeline and communicates with the input of compressor unit 1.
Specifically, according to the above connection manner, when the indoor evaporator group 9 needs to be refrigerated, after the compressor group 1 is used for compressing the low-temperature low-pressure liquid refrigerant, a high-temperature high-pressure gaseous refrigerant is generated, and then enters the input end of the cold control electromagnetic valve 2, and is further discharged into the first condensation tube group 51 from the output end of the cold control electromagnetic valve 2, and after the cooling effect of the first condensation tube group 51, a low-temperature high-pressure liquid refrigerant is formed and is further discharged into the coil 91 of the corresponding evaporator group 9, the control circuit is used for starting the heating wire to generate heat, when the low-temperature high-pressure liquid refrigerant enters the evaporator group 9, the evaporator group 9 evaporates and vaporizes the low-temperature high-pressure refrigerant, and in the process, the evaporator group 9 absorbs heat to the ambient air, and cools the ambient environment to reduce the; the low-temperature high-pressure liquid refrigerant forms low-temperature low-pressure vapor refrigerant after heat exchange of the evaporator group 9, finally flows back to the backflow inlet of the cold control electromagnetic valve 2, and then flows back to the backflow outlet of the cold control electromagnetic valve to be discharged into the input end of the compressor group 1, so that cyclic utilization is achieved.
The input of the thermal control electromagnetic valve 3 is communicated with the input of the cold control electromagnetic valve 2 through a pipeline, the output of the thermal control electromagnetic valve 3 is communicated with the evaporator group 9 through a pipeline, the evaporator group 9 is communicated with the second condensation pipe group 52 through a pipeline, the other end of the second condensation pipe group 52 is communicated with the reflux inlet of the thermal control electromagnetic valve 3 through a pipeline, and the reflux outlet of the thermal control electromagnetic valve 3 is communicated with the input of the compressor group 1 through a pipeline.
Specifically, according to the above connection manner, when the indoor evaporator set 9 needs to be heated, the compressor set 1 is utilized to compress the low-temperature low-pressure liquid refrigerant, so as to generate a high-temperature high-pressure gaseous refrigerant, then the high-temperature high-pressure gaseous refrigerant enters the input end of the thermal control electromagnetic valve 3, and then the high-temperature high-pressure gaseous refrigerant is discharged into the coil 91 of the evaporator set 9 from the output end of the thermal control electromagnetic valve 3, the superheated high-temperature high-pressure gaseous refrigerant passes through the evaporator set 9 and then radiates heat, so as to achieve the effect of heating the environment around the evaporator, the refrigerant after heat exchange is converted into the low-temperature high-pressure liquid refrigerant, and then enters the second condensation tube set 52, the low-temperature high-pressure liquid refrigerant completes the vaporization process in the second condensation tube set 52, the refrigerant liquid absorbs a large amount of heat to the outside world and is converted into a gaseous state again, so as to facilitate cooling the outdoor unit, and the mixture is discharged from a backflow outlet to the input end of the compressor, so that the recycling is realized.
In summary, based on the structure of the existing multi-split central air conditioner, the conventional four-way solenoid valve is replaced by the cold control solenoid valve 2 and the heat control solenoid valve 3 which are independent of each other, and the conventional single condenser pipe system is replaced by the two first condenser pipe set 51 and the second condenser pipe set 52 which are independent of each other, so that the compressor-cold control solenoid valve 2-evaporator set 9-first condenser pipe set 51-cold control solenoid valve 2-compressor unit 1 forms a complete refrigeration loop, and the compressor-heat control solenoid valve 3-evaporator set 9-second condenser pipe set 52-heat control solenoid valve 3-compressor unit 1 forms a complete heating loop, wherein the compressor unit 1 and the evaporator set 9 both belong to a common device, and the refrigeration and heating states of the evaporator set 9 can be controlled by the control circuit, the on/off states of the cold control solenoid valve 2, the hot control solenoid valve 3, the first condensation tube group 51 and the second condensation tube group 52 are selected. Therefore, the multi-split central air conditioner is realized, and meanwhile, the functions of refrigerating part of the indoor evaporator sets 9 (air conditioners) and heating part of other indoor evaporator sets 9 (air conditioners) are realized, so that the use requirements of different scenes are met, and the functions of using different external environments are achieved, so that the beneficial characteristic of improving the use diversity of the multi-split central air conditioner is achieved.
Referring to fig. 1 to 8, in order to reduce the clogging of the pipes by the impurities present in the refrigerant in the compressor, filtering elements 6 are connected between the evaporator group 9 and the first and second condenser groups 51 and 52, and the filtering elements 6 comprise a drying filter 62. Specifically, through setting up filter-drier 62, can dry the refrigerant through filter-drier 62, through reaching the function of absorbing the moisture in the refrigerant, can filter the impurity that exists in the refrigerant simultaneously, reduce the problem that the pipeline blockked up and reduce circulation rate to reach the beneficial characteristics that improve refrigeration or heating effect.
The number of the filtering elements 6 connected in series between the evaporator group 9 and the first condensation tube group 51 and the second condensation tube group 52 is two, the filtering elements 6 further comprise a check valve 61 and a capillary tube 63 connected in series through a pipeline, the capillary tube 63 is connected with the drying filter 62 through a pipeline, two ends of the check valve 61 are connected in parallel with two ends of the capillary tube 63 and the drying filter 62 along the series direction through a pipeline, the flow directions of the check valves 61 of the adjacent filtering elements 6 are opposite, and the flow direction of the check valve 61 close to the evaporator group 9 flows in the direction departing from the evaporator group 9. In addition, the drying filters 62 of adjacent filter elements 6 are arranged next to one another.
Specifically, in the process that the evaporator group 9 needs to be cooled, when passing through the filter element 6, the low-temperature high-pressure liquid refrigerant generated after passing through the first condensation tube group 51 flows in the direction close to the evaporator group 9 due to the fact that the flow direction of the check valve 61 close to the first condensation tube is toward the direction close to the evaporator group 9, and the flow speed of the capillary tube 63 is slow, so that the low-temperature high-pressure liquid refrigerant can firstly pass through the check valve 61 and then passes through the next filter element 6 due to the fact that the direction of the check valve 61 is reversed, the liquid refrigerant can firstly pass through the drying filter 62 and then pass through the capillary tube 63, and the effect of pressure reduction is achieved while the flow speed of the liquid refrigerant is reduced by the capillary tube 63, so that low-temperature low-pressure refrigerant liquid is formed, and finally discharged into the evaporator group 9 to cool the;
in addition, in the process of mainly heating the evaporator group 9, similarly, when the low-temperature high-pressure liquid refrigerant generated after passing through the evaporator group 9 passes through the two filter elements 6, the low-temperature high-pressure liquid refrigerant first passes through the check valve 61, then passes through the dry filter 62 of the next filter element 6 to absorb moisture, and then is depressurized by the capillary tube 63 and flows into the second condenser tube.
Referring to fig. 1 to 8, in order to realize the function of the control circuit to partially or fully activate the cold control solenoid valve 2 and the hot control solenoid valve 3. A piston electromagnetic valve 4 is connected between the input end of the cold control electromagnetic valve 2 and the input end of the hot control electromagnetic valve 3, the piston electromagnetic valve 4 comprises a first valve body 41, the first valve body 41 is cylindrical, a straight hole 42 communicated with the output end of the compressor unit 1 through a pipeline is arranged on the end surface of one axial end of the first valve body 41, two through holes 43 communicated with the cold control electromagnetic valve 2 and the hot control electromagnetic valve 3 through pipelines are arranged on the outer circumferential surface of the valve body respectively, the through holes 43 are communicated with the straight hole 42, a rotating block 44 is rotatably connected in the straight hole 42, the two through holes 43 are positioned on the same plane relative to the rotating shaft of the rotating block 44, the included angle of the two through holes 43 relative to the rotating shaft of the rotating block 44 is not 180 degrees, in the embodiment, the included angle of the two through holes 43 relative to the rotating shaft of the rotating block 44 is 90 degrees, the straight hole 42 is opposite to the rotating block, the outer peripheral surface of the rotating block 44 is provided with two connecting holes 442 corresponding to the two rotating blocks 44, the connecting holes 442 are communicated with the straight groove 441, the first valve body 41 is provided with a rotating member for driving the rotating block 44 to rotate, the rotating member comprises a motor 45 locked and connected with the first valve body 41 through a screw, and the motor 45 is connected with the control circuit through a circuit.
Specifically, by arranging the piston solenoid valve 4 between the compressor unit 1 and the cold control solenoid valve 2 and the hot control solenoid valve 3, the control circuit is used for controlling the motor 45 to drive the rotating block 44 to rotate, so as to control the number of the connecting holes 442 communicated with the two through holes 43, thereby achieving the function of opening and closing the cold control solenoid valve 2 and the hot control solenoid valve 3, when the two connecting holes 442 are communicated with the two through holes 43, the output end of the compressor can be communicated with the cold control solenoid valve 2 and the hot control solenoid valve 3 through the piston solenoid valve 4, and thus, the functions of synchronously starting refrigeration and heating are realized. In addition, it is worth to be noted that, by defining the included angle between the two rotating shafts passing through the rotating block 44 to be not 180 degrees, the function of closing the other through hole 43 in the state that one connecting hole 442 communicates with one through hole 43 is realized, thereby realizing the beneficial effect of partially or completely starting the cold control solenoid valve 2 and the hot control solenoid valve 3.
Referring to fig. 1 to 8, since the flow direction of the refrigerant passing through the coil 91 in the evaporator group 9 is opposite when the evaporator group 9 performs cooling and heating, the control circuit controls the communication relationship between the evaporator group 9 and the first condensation tube group 51, the second condensation tube, the cold control solenoid valve 2, and the hot control solenoid valve 3. The evaporator group 9, between the cold control electromagnetic valve 2 and the heat control electromagnetic valve 3, and the evaporator group 9, all there is a reversing electromagnetic valve 8 through the pipe connection between first condenser pipe and the second condenser pipe, the reversing electromagnetic valve 8 includes a second valve body 81, the second valve body 81 is opened outward and is equipped with the valve opening 82 that is linked together with the evaporator group 9 through the pipeline, two reversing holes 83 that are just right to each other are seted up to the outer peripheral face of second valve body 81, reversing hole 83 is linked together with valve opening 82, it has spring 84 to peg graft in the reversing hole 83, the one end of spring 84 and the inner wall fixed connection that the reversing hole 83 is far away from the end of valve opening 82, the one end fixed connection that two springs 84 are close to valve opening 82 has same valve ball 85, the both ends of spring 84 all are connected with control circuit, two reversing holes 83 of same reversing electromagnetic valve 8 communicate with cold control electromagnetic valve 2 and heat control electromagnetic valve 3 through the pipeline respectively, or, two reversing holes 83 of same reversing electromagnetic valve 52 are in communication.
Specifically, by arranging the reversing solenoid valve 8, the current electrifying condition of the springs 84 at the two ends of the same reversing solenoid valve 8 is controlled by the control circuit, so that the spring 84 drives the valve ball 85 to seal one reversing hole 83 of the same reversing valve. For example, when the evaporator group 9 needs to be cooled, the control circuit passes current with the same direction to the two ends of the spring 84 close to the thermal control solenoid valve 3 in the reversing solenoid valve 8 corresponding to the evaporator group 9, so that the spring 84 contracts according to the electromagnetic generating principle, and the valve ball 85 is pulled to close the reversing hole 83 close to the thermal control solenoid valve 3 in the reversing solenoid valve 8, so that the evaporator group 9 is communicated with the cold control solenoid valve 2; meanwhile, current with the same direction is applied to two ends of a spring 84 on one side close to the second condensation tube group 52 in the reversing solenoid valve 8 corresponding to the evaporator group 9 through a control circuit, so that the spring 84 contracts, a valve ball 85 is pulled to close a reversing hole 83 close to the second condensation tube group 52 in the reversing solenoid valve 8, and the evaporator group 9 is communicated with the first condensation tube group 51, so that the interference effect of the thermal control solenoid valve 3 and the second condensation tube can be effectively reduced; similarly, when the evaporator group 9 needs to be heated, the control circuit can utilize the electromagnetic principle to utilize the spring 84 to pull the valve ball 85 to close the reversing hole 83 near the cold control electromagnetic valve 2 and the first condensation tube group 51 side, so that the evaporator group 9 is communicated with the hot control electromagnetic valve 3 and the second condensation tube group 52, and the heating function is realized.
Referring to fig. 1 to 8, a blowing fan 92 is provided on one side of the evaporator group 9, and an inlet of the blowing fan 92 faces the evaporator group 9. Specifically, because the evaporator group 9 can evaporate and absorb heat to the refrigerant in its internal coil 91 and cool down around, or absorb heat to the refrigerant after outwards dispel the heat and produce the heat, through setting up the fan 92 of blowing, because the income wind gap of the fan 92 of blowing is just right with the evaporator group 9, consequently can be effectively with cooling down or radiating air around the evaporator group 9, blow to indoor around, thereby reach the effect of effectively cooling down or rising temperature indoor, make indoor temperature variation be in dynamic balance's state simultaneously, can effectively reach the energy saving and the beneficial effect of raising the efficiency.
In order to realize the cooling function of the first condensation duct and the second condensation duct. The first condensation pipe group 51 and the second condensation pipe group 52 are arranged side by side, fans 53 are arranged on two opposite sides of the first condensation pipe and the second condensation pipe, the wind directions of the fans 53 on two sides are consistent, the wind direction of the fan 53 close to the case is arranged towards the first condensation pipe group 51 and the second condensation pipe group 52, and the wind direction of the fan 53 close to the case is arranged towards the heat dissipation holes outside the case.
Specifically, the fans 53 are arranged on the two sides of the first condensation tube group 51 and the second condensation tube group 52, and the fans 53 in the case are used for blowing air to the first condensation tube group 51 and the second condensation tube group 52, so that the air cooling effect is achieved, meanwhile, the fans 53 close to the outside of the case are used for discharging blown heat out of the case through the heat dissipation holes, and the beneficial effect of heat dissipation is further achieved.
Referring to fig. 1 to 8, in the multi-split central air conditioner, since the indoor evaporator groups 9 are connected to the outdoor compressor, the thermal electromagnetic valve 3, the cold electromagnetic valve 2, the first condensation tube group 51, and the second condensation tube group 52 through pipes, the convenience of connecting the evaporator groups 9 to the outdoor unit case is achieved. The output end of the cold control electromagnetic valve 2, the output end of the hot control electromagnetic valve 3, the check valve 61 close to the end of the filter element 6 of the first condensation tube group 51 and the check valve 61 close to the end of the filter element 6 of the second condensation tube group 52 are communicated with an adjusting joint 7, a containing cavity 71 is formed in the adjusting joint 7, a plurality of connectors 72 for the evaporator group 9 to be detachably connected are arranged outside the adjusting joint 7, the connectors 72 are communicated with the containing cavity 71, the connectors 72 are in threaded connection with end covers 73, and two ends of the evaporator group 9 are communicated with mounting heads (not shown in the figure) in threaded connection with the connectors 72 through pipelines.
Specifically, through setting up a plurality of regulation joints 7 respectively with heat accuse solenoid valve 3, cold accuse solenoid valve 2, first condenser bank of tubes 51 and second condenser bank of tubes 52 intercommunication, simultaneously through set up a plurality ofly outside regulation joint 7 with hold the chamber 71 in to the connector 72 of intercommunication, so that the installation head threaded connection of evaporimeter group 9, thereby make evaporimeter and heat accuse solenoid valve 3, cold accuse solenoid valve 2, the easy and simple to handle of first condenser bank of tubes 51 or second condenser bank of tubes 52 intercommunication, reach the beneficial effect of reducing operating space simultaneously.
Referring to fig. 1 to 8, in order to implement the function of the control circuit, the control circuit can control the working states of the indoor evaporator group 9 for cooling or heating and can control the working states of the compressor unit 1, the thermal control solenoid valve 3 and the cold control solenoid valve 2 in the outdoor unit. Control circuit includes outdoor control circuit and indoor control circuit, indoor control circuit passes through wireless module and outdoor control circuit connection, wherein wireless module can be wireless WIFI, wireless communication techniques such as 4G or 5G, thereby realize sending indoor control circuit's control signal to outdoor control circuit's function, thereby long-range wireless transmission technique, compressor unit 1, cold-controlled solenoid valve 2, hot-controlled solenoid valve 3, piston solenoid valve 4, fan 53 all is connected with outdoor control circuit, indoor control circuit is connected with the control button (not shown in the figure) of temperature regulation, switching-over solenoid valve 8 is connected with indoor control circuit.
Specifically, the control circuit is divided into an outdoor control circuit and a plurality of indoor control circuits, because the indoor control circuits correspond to the indoor evaporator groups 9 respectively, the temperature to be regulated by the evaporator groups 9 is regulated by regulating a control button connected with the indoor control circuit according to the requirement, when the regulated temperature is less than or equal to 25 ℃, the evaporator groups 9 are indicated to be refrigerated, when the regulated temperature is more than 25 ℃, the evaporator groups 9 are indicated to be heated, meanwhile, a heating or refrigerating signal is sent to the outdoor control circuit through a wireless module, the outdoor control circuit judges whether the indoor evaporators simultaneously heat or refrigerate or simultaneously heat and refrigerate, and then the outdoor control circuit is used for controlling the motor 45 of the piston electromagnetic valve 4, the heat control electromagnetic valve 3 and the cold control electromagnetic valve 2 to work, thereby realizing the refrigerating and heating states of the multi-split central air-conditioning system.
Referring to fig. 1 to 8, the indoor control circuit is connected to a temperature sensor (not shown), and the temperature adjustment tolerance value of the temperature sensor is ± 0.8 ℃. Specifically, because the plurality of indoor control circuits respectively correspond to the plurality of evaporator groups 9, the temperature sensor is used for sensing the current indoor temperature condition, so as to judge whether the temperature value is adjusted through the control button, when the sensed temperature value is within the temperature adjustment tolerance value range of the temperature sensor, the compressor of the multi-split central air conditioner can be suspended for continuous work, and the advantages of saving energy and improving the adjustment efficiency are achieved; and when the temperature sensed by the temperature sensor exceeds the temperature sensing adjustment tolerance value range, the temperature sensor can transmit the temperature adjustment signal to the indoor control circuit, and the indoor control circuit transmits the temperature adjustment signal to the outdoor control circuit through the wireless module, so that the multi-split central air conditioner is triggered to continue working to perform cooling or heating temperature adjustment. Through setting up temperature sensor more than to set for temperature sensor's temperature regulation tolerance value, can effectively with the temperature control in reasonable temperature range, can realize improving work efficiency and energy saving's beneficial effect to a certain extent.
A control method of a multi-split central air-conditioning system comprises the following steps:
the first step is as follows: temperature adjustment selection: adjusting a control knob of the indoor control circuit to select an adjusted temperature;
the second step is that: judging the regulating quantity of the evaporator: when the number of the temperature of the evaporator group 9 is one, starting the multi-split central air conditioner to adjust the temperature according to the selected temperature adjusting condition; when the number of the temperature of the evaporator groups 9 is multiple, judging whether the temperature regulation requirements of the evaporator groups 9 needing temperature regulation are consistent, if so, starting the multi-split central air conditioner to regulate the temperature according to the specified temperature regulation condition; if not, entering the next step;
the third step: starting a refrigeration and heating parallel regulation mode: the compressor unit 1, the cold control electromagnetic valve 2, the hot control electromagnetic valve 3, the fan 53 and the piston electromagnetic valve 4 are started to work by using the outdoor control circuit, the piston electromagnetic valve 4 drives the rotating piece to drive the rotating block 44 to rotate under the control action of the outdoor control circuit, and the two connecting holes 442 on the rotating block 44 are in right-to-front communication with the two through holes 43 on the first valve body 41, so that high-temperature and high-pressure refrigerant generated by the compressor unit 1 is discharged into the cold control electromagnetic valve 2 and the hot control electromagnetic valve 3;
the fourth step: controlling the temperature control state according to the temperature required by the indoor evaporator: when the adjusting temperature of the control knob of the indoor control circuit is less than or equal to 25 ℃, the indoor control circuit leads current with the same direction to two ends of the spring 84 close to one side of the thermal control electromagnetic valve 3 so as to drive the valve ball 85 in the reversing electromagnetic valve 8 to seal the reversing hole 83 close to one side of the thermal control electromagnetic valve 3; on the contrary, when the adjusting temperature of the control knob of the indoor control circuit is higher than 25 ℃, the indoor control circuit applies current with the same direction to the two ends of the spring 84 close to the cold control electromagnetic valve 2, so as to drive the valve ball 85 in the reversing electromagnetic valve 8 to seal the reversing hole 83 close to the cold control electromagnetic valve 2.
Specifically, by adopting the control method, the multi-split central air-conditioning system can perform the functions of synchronously cooling and heating a plurality of areas according to the temperature regulation requirement, or simultaneously cooling and heating local areas and heating other required areas. The beneficial effects of the refrigeration and heating parallel use of the multi-split central air conditioner can be enriched, so that the effect of enriching the use of users according to the appointed requirements is achieved, and the beneficial effects of saving energy and improving the refrigeration and heating efficiency can be realized.
The embodiments of the present invention are not limited thereto, and according to the above-mentioned contents of the present invention, the present invention can be modified, substituted or combined in other various forms without departing from the basic technical idea of the present invention.
Claims (10)
1. The utility model provides a many online central air conditioning system which characterized in that: the system comprises a compressor unit, a cold control electromagnetic valve, a hot control electromagnetic valve, a first condensation pipe group, a second condensation pipe group, a control circuit and a plurality of evaporator groups;
the output end of the compressor unit is communicated with the input end of the cold control electromagnetic valve, the output end of the cold control electromagnetic valve is communicated with the first condensation pipe group, the other end of the first condensation pipe group is communicated with the evaporator group, the other end of the evaporator group is communicated with the return inlet of the cold control electromagnetic valve, and the return outlet of the cold control electromagnetic valve is communicated with the input end of the compressor unit;
the input end of the thermal control electromagnetic valve is communicated with the input end of the cold control electromagnetic valve, the output end of the thermal control electromagnetic valve is communicated with the evaporator group, the evaporator group is communicated with the second condensation pipe group, the other end of the second condensation pipe group is communicated with the backflow inlet of the thermal control electromagnetic valve, and the backflow outlet of the thermal control electromagnetic valve is communicated with the input end of the compressor unit;
a filtering piece is connected between the evaporator group and the first and second condensation tube groups;
and the compressor unit, the cold control electromagnetic valve and the hot control electromagnetic valve are all connected with the control circuit.
2. A multi-split central air conditioning system as set forth in claim 1, wherein: the filter element includes a dry filter.
3. A multi-split central air conditioning system as claimed in claim 2, wherein: the evaporator group with first condenser nest of tubes with the filtration piece quantity of establishing ties between the second condenser nest of tubes is the even number, it still includes check valve and capillary to filter the piece, the capillary with dry filter connects, the check valve with capillary and dry filter are parallelly connected, and is adjacent the circulation direction of the check valve of filtering the piece is opposite, is close to the circulation direction orientation of the check valve of evaporator group deviates from the direction circulation of evaporator group.
4. A multi-split central air conditioning system as set forth in claim 1, wherein: a piston electromagnetic valve is connected between the input end of the cold control electromagnetic valve and the input end of the hot control electromagnetic valve, the piston electromagnetic valve comprises a first valve body, the first valve body is provided with a straight hole communicated with the output end of the compressor unit, the outer peripheral surface of the valve body is provided with two through holes respectively communicated with the cold control electromagnetic valve and the hot control electromagnetic valve, the through holes are communicated with the straight hole, the straight hole is internally and rotatably connected with a rotating block, the two through holes are positioned on the same plane relative to the rotating shaft of the rotating block, the straight hole is opposite to the rotating block, the end surface of the rotating block facing the straight hole is provided with a straight groove communicated with the straight hole, the outer peripheral surface of the rotating block is provided with two connecting holes corresponding to the two rotating blocks, the connecting holes are communicated with the straight groove, and the first valve body is provided with a rotating piece for driving the, the rotating piece is connected with the control circuit.
5. A multi-split central air conditioning system as set forth in claim 1, wherein: the utility model discloses a refrigeration system, including evaporator group, cold accuse solenoid valve and heat accuse solenoid valve, and all be connected with the switching-over solenoid valve between evaporator group, first condenser pipe and the second condenser pipe, the switching-over solenoid valve includes the second valve body, the second valve body seted up with the valve opening that the evaporator group is linked together, two switching-over holes have been seted up to the outer peripheral face of second valve body, the switching-over hole with the valve opening is linked together, the downthehole spring that is provided with of switching-over, two the spring is close to the same valve ball of one end fixedly connected with of valve opening, the both ends of spring all with control circuit connects.
6. A multi-split central air conditioning system as set forth in claim 1, wherein: the first condensation pipe group and the second condensation pipe group are arranged side by side, the two opposite sides of the first condensation pipe and the second condensation pipe are provided with fans, the wind directions of the fans are consistent, the fan wind direction close to the machine case is towards the first condensation pipe group and the second condensation pipe group, and the fan wind direction close to the machine case is towards the machine case.
7. A multi-split central air conditioning system as set forth in claim 1, wherein: the cold control electromagnetic valve output end, the hot control electromagnetic valve output end, the first condensation pipe group and the second condensation pipe group are all communicated with an adjusting joint, an accommodating cavity is formed in the adjusting joint, a plurality of connectors for the evaporator group to detachably connect are arranged outside the adjusting joint, the connectors are communicated with the inside of the accommodating cavity, and the connectors are in threaded connection with end covers.
8. A multi-split central air conditioning system as claimed in any one of claims 1 to 7, wherein: the control circuit comprises an outdoor control circuit and an indoor control circuit, the indoor control circuit is connected with the outdoor control circuit through a wireless module, the compressor unit, the cold control electromagnetic valve, the hot control electromagnetic valve, the piston electromagnetic valve and the fan are all connected with the outdoor control circuit, the indoor control circuit is connected with a control button for adjusting temperature, and the reversing electromagnetic valve is connected with the indoor control circuit.
9. A multi-split central air conditioning system as claimed in claim 8, wherein: the indoor control circuit is connected with a temperature sensor, and the temperature regulation tolerance value of the temperature sensor is +/-0.8 ℃.
10. The control method of a multi-split central air conditioning system as claimed in claim 9, comprising the steps of:
the first step is as follows: temperature adjustment selection: adjusting a control knob of the indoor control circuit to select an adjusted temperature;
the second step is that: judging the regulating quantity of the evaporator: when the number of the temperature of the evaporator group is one, starting the multi-split central air conditioner to regulate the temperature according to the selected temperature regulation condition; when the number of the temperature of the evaporator groups is multiple, judging whether the temperature regulation requirements of the evaporator groups needing temperature regulation are consistent, if so, starting the multi-split central air conditioner to regulate the temperature according to the specified temperature regulation condition; if not, entering the next step;
the third step: starting a refrigeration and heating parallel regulation mode: the compressor unit, the cold control electromagnetic valve, the hot control electromagnetic valve, the fan and the piston electromagnetic valve are started to work by using the outdoor control circuit, the piston electromagnetic valve drives the rotating piece to drive the rotating block to rotate under the control action of the outdoor control circuit, and the two connecting holes in the rotating block are in direct opposite communication with the two through holes in the first valve body, so that high-temperature and high-pressure refrigerant generated by the compressor unit is driven to be discharged into the cold control electromagnetic valve and the hot control electromagnetic valve;
the fourth step: controlling the temperature control state according to the temperature required by the indoor evaporator: when the adjusting temperature of a control knob of the indoor control circuit is less than or equal to 25 ℃, the indoor control circuit leads current with the same direction to two ends of a spring close to one side of the thermal control electromagnetic valve so as to drive a valve ball in the reversing electromagnetic valve to seal a reversing hole close to one side of the thermal control electromagnetic valve; and conversely, when the adjusting temperature of the control knob of the indoor control circuit is higher than 25 ℃, the indoor control circuit applies current with the same direction to the two ends of the spring close to one side of the cold control electromagnetic valve so as to drive a valve ball in the reversing electromagnetic valve to seal the reversing hole close to one side of the cold control electromagnetic valve.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023088066A1 (en) * | 2021-11-17 | 2023-05-25 | 北京市京科伦冷冻设备有限公司 | Multi-split central air conditioning system for simultaneous cooling and heating |
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