CN114427760B - Air conditioning unit and control method thereof - Google Patents

Air conditioning unit and control method thereof Download PDF

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Publication number
CN114427760B
CN114427760B CN202011182293.1A CN202011182293A CN114427760B CN 114427760 B CN114427760 B CN 114427760B CN 202011182293 A CN202011182293 A CN 202011182293A CN 114427760 B CN114427760 B CN 114427760B
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CN
China
Prior art keywords
port
valve assembly
air conditioning
conditioning unit
electronic expansion
Prior art date
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Active
Application number
CN202011182293.1A
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Chinese (zh)
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CN114427760A (en
Inventor
刘文斌
周威
潘李奎
周玲
罗倩妮
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Shenzhen Mcquay Air Conditioning Co Ltd
Original Assignee
Shenzhen Mcquay Air Conditioning Co Ltd
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Priority to CN202011182293.1A priority Critical patent/CN114427760B/en
Publication of CN114427760A publication Critical patent/CN114427760A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/003—Filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/029—Control issues
    • F25B2313/0292—Control issues related to reversing valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/19—Pumping down refrigerant from one part of the cycle to another part of the cycle, e.g. when the cycle is changed from cooling to heating, or before a defrost cycle is started
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion valves
    • 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 application provides an air conditioning unit and a control method thereof, wherein the air conditioning unit comprises: compressor assembly (1), four-way reversing valve assembly (2), solenoid valve assembly (3), air heat exchanger subassembly (4), hot water heat exchanger (5), cold water heat exchanger (6), reservoir (7), first electronic expansion valve (11), first electronic expansion valve assembly (12), first check valve (13), second check valve (14), third check valve (15), fourth check valve (16), first check valve assembly (17), second check valve assembly (18) and solenoid valve (19). The air conditioning unit can respectively and independently adjust heating or refrigerating capacity of the priority side and refrigerating or heating capacity of the non-priority side, so that the air conditioning unit is prevented from frequently switching operation modes or stopping, and the air conditioning unit can be ensured to stably adapt to the cold and hot load demands of users.

Description

Air conditioning unit and control method thereof
Technical Field
The application relates to the technical field of control, in particular to an air conditioning unit and a control method thereof.
Background
Along with the diversification of modern building functions, the partition design is adopted, the cold and hot load demands of various functional areas are different, and the same functional area also has the condition that the cold and hot loads are simultaneously required, for example: the operation room of the hospital needs to cool and dehumidify the outdoor fresh air and then heat the air to reach the supply air temperature and humidity of the operation room, so that a cold source and a heat source are needed to be provided for the terminal equipment of the operation room at the same time, and similar places also comprise large-scale comprehensive commercial buildings, swimming pool buildings, cultural venues and the like.
In the traditional design, the cold source is usually provided through an air conditioning unit which is arranged independently, but the air conditioning unit can release a large amount of waste heat to cause resource waste when refrigerating, the heat source is usually provided through a boiler which is arranged independently, but the boiler adds a lot of investment and operation and maintenance cost to a user, and the cold source and the heat source are required to consume energy respectively, so that cold and heat offset is caused, and the energy utilization rate is low.
In recent years, air-cooled heat recovery and four-pipe air conditioning units are increasingly applied to the places above, and cold water and hot water can be prepared simultaneously, but the air-cooled heat recovery and four-pipe air conditioning units control compressors to carry and advance in a modified manner according to the principle of cold water preference or hot water preference so as to ensure the water temperature at the preferential side.
It should be noted that the foregoing description of the background art is only for the purpose of providing a clear and complete description of the technical solution of the present application and is presented for the convenience of understanding by those skilled in the art. The above-described solutions are not considered to be known to the person skilled in the art simply because they are set forth in the background of the application section.
Disclosure of Invention
The inventor of the application discovers that in the air-cooling heat recovery and four-pipe air conditioning unit in the prior art, due to the imperfect design and related control, the phenomenon that the water temperature at the non-priority side is too high to be relieved often causes frequent switching of the operation mode or shutdown of the unit, so that the air conditioning unit cannot realize automatic balance of cold and hot loads, thereby causing larger fluctuation of the temperature of cold water and hot water and poorer user experience. Therefore, how to ensure that the air conditioning unit stably adapts to the cold and hot load demands of users becomes a problem to be solved.
The embodiment of the application provides an air conditioning unit, wherein when the air conditioning unit is in an automatic operation mode with heating priority or refrigerating priority, heating or refrigerating capacity of a priority side is regulated by load reduction and load reduction of a compressor, and refrigerating or heating capacity of a non-priority side is regulated by an air heat exchanger component.
According to a first aspect of an embodiment of the present application, there is provided an air conditioning unit including: the air heat exchanger comprises a compressor assembly 1, a four-way reversing valve assembly 2, a solenoid valve assembly 3, an air heat exchanger assembly 4, a hot water heat exchanger 5, a cold water heat exchanger 6, a liquid reservoir 7, a first electronic expansion valve 11, a first electronic expansion valve assembly 12, a first check valve 13, a second check valve 14, a third check valve 15, a fourth check valve 16, a first check valve assembly 17, a second check valve assembly 18 and a solenoid valve 19;
an exhaust port 1001 of the compressor assembly 1 is respectively connected with a 1 st port of the four-way reversing valve assembly 2 and an inlet 301 of the electromagnetic valve assembly 3, an air suction port 1002 of the compressor assembly 1 is respectively connected with an outlet of the first one-way valve assembly 17 and an outlet of the cold water heat exchanger 6, and an inlet of the first one-way valve assembly 17 is connected with a 3 rd port of the four-way reversing valve assembly 2;
The 2 nd port of the four-way reversing valve assembly 2 is connected with the inlet 401 of the air heat exchanger assembly 4, and the 4 th port of the four-way reversing valve assembly 2 is in a closed state relative to the external environment;
the outlet 402 of the air heat exchanger assembly 4 is connected with the outlet 121 of the electronic expansion valve assembly 12 and the inlet of the second one-way valve assembly 18, and the outlet of the second one-way valve assembly 18 is connected with the inlet of the second one-way valve 14, the outlet of the third one-way valve 15 and the inlet 122 of the electronic expansion valve assembly 12;
an inlet 501 of the hot water heat exchanger 5 is connected with the outlet 302 of the electromagnetic valve assembly 3, and an outlet 502 of the hot water heat exchanger 5 is connected with an inlet of the liquid reservoir 7;
the outlet of the liquid storage device 7 is respectively connected with the inlet of the first one-way valve 13 and the inlet of the electromagnetic valve 19, and the outlet of the electromagnetic valve 19 is connected with the inlet of the fourth one-way valve 16;
the outlet of the first check valve 13 is connected with the outlet of the second check valve 14, and the outlet of the first check valve 13 and the outlet of the second check valve 14 output refrigerant to the inlet of the third check valve 15 and the inlet 111 of the electronic expansion valve 11;
The inlet of the cold water heat exchanger 6 is respectively connected with the outlet of the fourth one-way valve 16 and the outlet 112 of the electronic expansion valve 11.
According to a second aspect of the embodiment of the present application, there is provided a control method of an air conditioning unit, for controlling the air conditioning unit described in the first aspect, the control method including:
the controller of the air conditioning unit controls according to the running mode and the running state of the air conditioning unit:
load and unload of the compressor assembly 1; and/or communication states among the 1 st port, the 2 nd port, the 3 rd port and the 4 th port in the four-way reversing valve assembly 2; and/or
Opening and closing of the solenoid valve assembly 3; and/or
Opening and closing of the first electronic expansion valve 11; and/or
Opening and closing of the first electronic expansion valve assembly 12; and/or
The solenoid valve 19 is opened and closed.
The embodiment of the application has the beneficial effects that: the air conditioning unit can respectively and independently adjust the heating or refrigerating capacity of the priority side and the refrigerating or heating capacity of the non-priority side, so that the air conditioning unit is prevented from frequently switching the operation mode or stopping, and the air conditioning unit can be ensured to stably adapt to the cold and hot load demands of users.
Specific embodiments of the application are disclosed in detail below with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the application are not limited in scope thereby. The embodiments of the application include many variations, modifications and equivalents within the scope of the appended claims.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.
Drawings
Elements and features described in one drawing or one implementation of an embodiment of the application may be combined with elements and features shown in one or more other drawings or implementations. Furthermore, in the drawings, like reference numerals designate corresponding parts throughout the several views, and may be used to designate corresponding parts as used in more than one embodiment.
The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is evident that the drawings in the following description are only some embodiments of the present application and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. In the drawings:
FIG. 1 is a schematic view of an air conditioning unit according to embodiment 1 of the present application;
fig. 2 is a schematic diagram of a refrigerant flow path of the air conditioning unit according to embodiment 1 of the present application in a heating mode;
FIG. 3 is a schematic diagram of the refrigerant flow of the air conditioning unit according to embodiment 1 of the present application in the heating-priority automatic operation mode;
FIG. 4 is another schematic diagram of the refrigerant flow of the air conditioning unit according to embodiment 1 of the present application in the heating-priority automatic operation mode;
FIG. 5 is a schematic diagram of the refrigerant flow of the air conditioning unit according to embodiment 1 of the present application in the automatic operation mode with priority of cooling;
fig. 6 is a schematic diagram of a control method of an air conditioning unit according to embodiment 1 of the present application.
Detailed Description
The foregoing and other features of the application will become apparent from the following description, taken in conjunction with the accompanying drawings. In the specification and drawings, there have been specifically disclosed specific embodiments of the application that are indicative of some of the ways in which the principles of the application may be employed, it being understood that the application is not limited to the specific embodiments described, but includes all modifications, variations and equivalents falling within the scope of the appended claims. Various embodiments of the present application are described below with reference to the accompanying drawings. These embodiments are merely illustrative and not limiting of the application.
In the embodiments of the present application, the terms "first," "second," and the like are used to distinguish between different elements from each other by name, but do not indicate spatial arrangement or time sequence of the elements, and the elements should not be limited by the terms. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprises," "comprising," "including," "having," and the like, are intended to reference the presence of stated features, elements, components, or groups of components, but do not preclude the presence or addition of one or more other features, elements, components, or groups of components. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In embodiments of the present application, the singular forms "a," an, "and" the "include plural referents and should be construed broadly to mean" one "or" one type "and not limited to" one "or" another; furthermore, the term "the" should be understood to include both the singular and the plural, unless the context clearly indicates otherwise. Furthermore, the term "according to" should be understood as "at least partially according to … …", and the term "based on" should be understood as "based at least partially on … …", unless the context clearly indicates otherwise.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art in a specific case.
In the description of the present application, the 1 st port of the four-way reversing valve may be the D port, the 2 nd port of the four-way reversing valve may be the C port, the 3 rd port of the four-way reversing valve may be the S port, and the 4 th port of the four-way reversing valve may be the E port. For the description of the D, C, E and S ports of the four-way reversing valve, reference may be made to the related art.
Example 1
The embodiment 1 of the application provides an air conditioning unit.
Fig. 1 is a schematic view of an air conditioning unit according to embodiment 1 of the present application. As shown in fig. 1, the air conditioning unit 100 includes: compressor assembly 1, four-way reversing valve assembly 2, solenoid valve assembly 3, air heat exchanger assembly 4, hot water heat exchanger 5, cold water heat exchanger 6, reservoir 7, first electronic expansion valve 11, first electronic expansion valve assembly 12, first check valve 13, second check valve 14, third check valve 15, fourth check valve 16, first check valve assembly 17, second check valve assembly 18, and solenoid valve 19.
As shown in fig. 1, the hot water heat exchanger 5 has a water inlet 5a and a water outlet 5b, medium water enters the hot water heat exchanger 5 from the water inlet 5a, exchanges heat with refrigerant in the hot water heat exchanger 5, and is heated to hot water, the hot water flows out of the hot water heat exchanger 5 from the water outlet 5b, and the discharged hot water can be delivered to a user for heating. In the present application, the heating capacity of the air conditioning unit 100 may refer to the temperature of the hot water flowing out of the hot water heat exchanger 5, and the higher the temperature of the hot water, the stronger the heating capacity of the air conditioning unit 100.
As shown in fig. 1, the cold water heat exchanger 6 has a water inlet 6a and a water outlet 6b, medium water enters the cold water heat exchanger 6 from the water inlet 6a, exchanges heat with the refrigerant in the cold water heat exchanger 6, and is absorbed into cold water, the cold water flows out of the cold water heat exchanger 6 from the water outlet 6b, and the cold water flowing out can be delivered to a user for refrigeration. In the present application, the cooling capacity of the air conditioning unit 100 may refer to the temperature of the cold water flowing out of the cold water heat exchanger 6, and the lower the temperature of the cold water is, the stronger the cooling capacity of the air conditioning unit 100 is.
In the present embodiment, the hot water heat exchanger 5 and the cold water heat exchanger 6 exchange heat with the refrigerant by the medium water, and the present application is not limited thereto, and other mediums may be used for exchanging heat with the refrigerant.
In this embodiment, as shown in fig. 1, the exhaust port 1001 of the compressor assembly 1 is connected to the 1 st port (e.g., D port) of the four-way reversing valve assembly 2 and the inlet 301 of the solenoid valve assembly 3, the intake port 1002 of the compressor assembly 1 is connected to the outlet of the first check valve assembly 17 and the outlet of the cold water heat exchanger 6, and the inlet of the first check valve assembly 17 is connected to the 3 rd port (e.g., S port) of the four-way reversing valve assembly 2;
the 2 nd port (for example, the C port) of the four-way reversing valve assembly 2 is connected with the inlet 401 of the air heat exchanger assembly 4, and the 4 th port (for example, the E port) of the four-way reversing valve assembly 2 is in a closed state relative to the external environment;
the outlet 402 of the air heat exchanger assembly 4 is connected with the outlet 121 of the electronic expansion valve assembly 12 and the inlet of the second one-way valve assembly 18, and the outlet of the second one-way valve assembly 18 is connected with the inlet of the second one-way valve 14, the outlet of the third one-way valve 15 and the inlet 122 of the electronic expansion valve assembly 12;
an inlet 501 of the hot water heat exchanger 5 is connected with the outlet 302 of the electromagnetic valve assembly 3, an outlet 502 of the hot water heat exchanger 5 is connected with an inlet of the liquid reservoir 7, and the inlet 501 and the outlet 502 of the hot water heat exchanger 5 are used for enabling the refrigerant to flow into and flow out of the hot water heat exchanger 5;
the outlet of the liquid reservoir 7 is respectively connected with the inlet of the first one-way valve 13 and the inlet of the electromagnetic valve 19, and the outlet of the electromagnetic valve 19 is connected with the inlet of the fourth one-way valve 16;
The outlet of the first check valve 13 is connected with the outlet of the second check valve 14, and the outlet of the first check valve 13 and the outlet of the second check valve 14 output the refrigerant to the inlet of the third check valve 15 and the inlet 111 of the electronic expansion valve 11;
the inlet 601 of the cold water heat exchanger 6 is connected to the outlet of the fourth non-return valve 16 and the outlet 112 of the electronic expansion valve 11, respectively, where the inlet 601 of the cold water heat exchanger 6 is used for the inflow of the refrigerant into the cold water heat exchanger 6.
According to the embodiment, the composition structure of the air conditioning unit 100 can allow the heating or refrigerating capacity on the priority side and the cooling or heating capacity on the non-priority side to be respectively and independently adjusted, so that the air conditioning unit is prevented from frequently switching the operation mode or stopping, and the air conditioning unit can be ensured to be stably adapted to the cold and hot load demands of users.
As shown in fig. 1, the air conditioning unit 100 may further include an economizer 9 and a thermal expansion valve 10. Wherein the main side inlet 901 of the economizer 9 receives the refrigerant outputted from the outlet of the first check valve 13 and the outlet of the second check valve 14, the main side outlet 902 of the economizer 9 is connected with the inlet of the third check valve 15, the inlet 101 of the thermal expansion valve 10 and the inlet 111 of the electronic expansion valve 11, the outlet 102 of the thermal expansion valve 10 is connected with the auxiliary side inlet 903 of the economizer 9, and the air supplementing port 1003 of the compressor assembly 1 is connected with the auxiliary side outlet 904 of the economizer 9. By arranging the economizer 9, the refrigerant can be supplemented to the air supplementing port 1003 of the compressor 1, so that the supercooling degree of the air conditioning unit is increased, and the performance of the air conditioning unit is finally improved.
As shown in fig. 1, the air conditioning unit 100 may further include a dry filter 8. The inlet of the drier-filter 8 is connected to the outlet of the first one-way valve 13 and the outlet of the second one-way valve 14, and the outlet of the drier-filter 8 is connected to the main side inlet 901 of the economizer 9. By providing the dry filter 8, the dryness of the refrigerant can be improved, and the moisture and impurities in the air conditioning unit can be reduced.
In this embodiment, the compressor assembly 1 may include at least one compressor, and when the number of compressors is 2 or more, the 2 or more compressors may be disposed in parallel. The air inlet, the air outlet and the air supplementing opening of the compressor assembly 1 can refer to the air inlet, the air outlet and the air supplementing opening of each compressor. Each compressor may be a rotor compressor, a scroll compressor, a screw compressor, a centrifugal compressor, or a magnetic levitation compressor, and further, each compressor may be a fixed frequency compressor or a variable frequency compressor.
In this embodiment, the four-way reversing valve assembly 2 may include more than two four-way reversing valves, wherein the 1 st, 2 nd, 3 rd and 4 th ports of the four-way reversing valve assembly 2 may refer to the 1 st, 2 nd, 3 rd and 4 th ports of the four-way reversing valve.
In this embodiment, the solenoid valve assembly 3 may include more than one solenoid valve. Wherein the inlet and outlet of the solenoid valve assembly 3 may refer to the inlet and outlet of the solenoid valve.
In this embodiment, the air heat exchanger assembly 4 may include at least two heat exchange modules. The inlet and outlet of the air heat exchanger assembly 4 may refer to the inlet and outlet of each heat exchange module. Each heat exchange module may be correspondingly connected to each four-way reversing valve, for example, an inlet of the heat exchange module may be connected to the 2 nd port of the corresponding four-way reversing valve.
In this embodiment, each heat exchange module may include two copper-aluminum fin heat exchangers fixed in a V-shaped arrangement by two end plates. In addition, each heat exchange module can also comprise two fans, and the fans can be fixed-frequency or variable-frequency axial flow fans. The application is not limited to this, the material, number and arrangement of the heat exchangers in each heat exchange module can be other schemes, and the number of fans can be one or more than three.
In the present embodiment, the hot water heat exchanger 5 may be, for example, a plate heat exchanger, a dry heat exchanger, a flooded heat exchanger, or a falling film heat exchanger, the cold water heat exchanger 6 may be, for example, a plate heat exchanger, a dry heat exchanger, a flooded heat exchanger, or a falling film heat exchanger, and the economizer 9 may be, for example, a plate heat exchanger.
In this embodiment, the electronic expansion valve assembly 12 may include more than two electronic expansion valves. Wherein the inlet 122 and outlet 121 of the electronic expansion valve assembly 12 may refer to the inlet or outlet of each electronic expansion valve. Each electronic expansion valve may be connected in correspondence with each heat exchange module, for example, the outlet of each electronic expansion valve is connected with the outlet of the corresponding heat exchange module.
In this embodiment, the first check valve assembly 17 may include more than two check valves. Wherein the inlet and outlet of the first one-way valve assembly 17 may refer to the inlet or outlet of each one-way valve. Each one-way valve is correspondingly connected with each four-way reversing valve, for example, the inlet of each one-way valve can be connected with the 3 rd port of the corresponding four-way reversing valve. Further, the outlets of all the check valves in the first check valve assembly 17 may be connected to the suction port 1002 of the compressor assembly 1.
In this embodiment, the second check valve assembly 18 may include more than two check valves. Wherein the inlet and outlet of the second one-way valve assembly 18 may refer to the inlet or outlet of each one-way valve. Each one-way valve may be connected in correspondence with each heat exchange module, for example, with each one-way valve inlet connected with the outlet of the corresponding heat exchange module.
In the present embodiment, the number of four-way valves in the four-way reversing valve assembly 2, the number of heat exchange modules in the air heat exchanger assembly 4, the number of electronic expansion valves in the electronic expansion valve assembly 12, the number of check valves in the first check valve assembly 17 and the number of check valves in the second check valve assembly 18 are the same, for example, in fig. 1 of the present application, the above numbers are all 4.
In the present embodiment, the air conditioning unit 100 may further include a controller (not shown) that may perform control so as to perform a control method of the air conditioning unit 100.
Fig. 6 is a schematic diagram of a control method of an air conditioning unit according to an embodiment of the present application, as shown in fig. 6, the control method includes:
operation 601: the controller controls according to the running mode and the running state of the air conditioning unit: load and unload of the compressor assembly 1; and/or, the communication state among the 1 st port, the 2 nd port, the 3 rd port and the 4 th port in the four-way reversing valve assembly 2; and/or opening and closing of the solenoid valve assembly 3; and/or opening and closing of the first electronic expansion valve 11; and/or opening and closing of the first electronic expansion valve assembly 12; and/or opening and closing of the solenoid valve 19.
For example, when the air conditioning unit 100 is in the cooling mode, the controller controls such that:
the 1 st and 2 nd ports of the four-way reversing valve assembly 2 are communicated, the 3 rd and 4 th ports are communicated, the first electronic expansion valve 11 is opened, the electromagnetic valve 19 is opened, the electromagnetic valves in the electromagnetic valve assembly 3 are all closed, and the electronic expansion valves in the first electronic expansion valve assembly 12 are all closed.
For another example, when the air conditioning unit 100 is in the heating mode, the controller controls such that:
The 1 st and 4 th ports of the four-way reversing valve assembly 2 are communicated, the 2 nd and 3 rd ports are communicated, the first electronic expansion valve 11 is closed, the electromagnetic valve 19 is closed, the electromagnetic valves in the electromagnetic valve assembly 3 are all opened, and the electronic expansion valves in the first electronic expansion valve assembly 12 are all opened.
For another example, when the air conditioning unit 100 is in the automatic operation mode with priority for heating, the air conditioning unit 100 heats and cools simultaneously, and the controller controls such that:
the 1 st port and the 4 th port of the four-way reversing valve assembly 2 are communicated, the 2 nd port and the 3 rd port are communicated, the first electronic expansion valve 11 is opened, the electromagnetic valve 19 is closed, and all electromagnetic valves in the electromagnetic valve assembly 3 are opened; and, the controller controls each electronic expansion valve in the first electronic expansion valve assembly 12 to be opened or closed according to the cooling capacity of the air conditioning unit. Wherein, when the air conditioning unit is in the automatic operation mode with heating priority: when the cooling capacity of the air conditioning unit is greater than the set cooling capacity (e.g., the cooling water temperature is too low), the controller controls at least a portion of the electronic expansion valves in the first electronic expansion valve assembly 12 to open; otherwise, all electronic expansion valves in the first electronic expansion valve assembly 12 are closed.
For another example, when the air conditioning unit 100 is in the automatic operation mode in which cooling is prioritized, the air conditioning unit 100 heats and cools simultaneously, and the controller controls such that:
the electronic expansion valves in the first electronic expansion valve assembly 12 are all closed, the first electronic expansion valve 11 is open, the solenoid valve 19 is closed, and the solenoid valves in the solenoid valve assembly 3 are all open; and, the controller controls the communication state among the 1 st, 2 nd, 3 rd and 4 th ports in each four-way reversing valve in the four-way reversing valve assembly (2) according to the heating capacity of the air conditioning unit, for example: when the heating capacity of the air conditioner unit is larger than the set first heating capacity (for example, the temperature of hot water is too high), the controller controls the conduction of the 1 st port and the 2 nd port in at least part of four-way reversing valves in the four-way reversing valve assembly (2), and the conduction of the 3 rd port and the 4 th port; or when the heating capacity of the air conditioner unit is smaller than the set second heating capacity (for example, the temperature of the hot water is too low), the controller controls the 1 st port and the 4 th port to be conducted and the 2 nd port and the 3 rd port to be conducted in at least part of four-way reversing valves in the four-way reversing valve assembly (2).
Next, each operation mode of the air conditioner unit 100 will be further described.
1. Cooling mode:
in the cooling mode, the air conditioning unit 100 provides cold water, which controls compressor loading.
All the D ports and the C ports of the four-way reversing valves in the four-way reversing valve assembly 2 are communicated, all the E ports and the S ports are communicated, all the four heat exchange modules included in the air heat exchanger assembly 4 are used as condensers, the cold water heat exchanger 6 is used as an evaporator to provide cold water, the hot water heat exchanger 5 is idle, the electronic expansion valve 11 is opened, the electromagnetic valve 19 is opened, all the four electromagnetic valves in the electromagnetic valve assembly 3 are closed, and all the four electronic expansion valves in the electronic expansion valve assembly 12 are closed. The solenoid valve 19 is opened in the cooling mode in order to allow the refrigerant in the accumulator 7 to participate in the circulation circuit of the cooling refrigerant in the cooling mode.
The cooling circulation path in the air conditioning unit 100 is as shown in fig. 1, namely: the high-temperature high-pressure gaseous refrigerant discharged from the exhaust port of the compressor component 1 enters the air heat exchanger component 4 through the four-way reversing valve component 2 and is subjected to condensation heat exchange with low-temperature air in the air heat exchanger component, the condensed liquid refrigerant enters the economizer 9 and is supercooled in the air heat exchanger component, the refrigerant in the state is throttled into a two-phase refrigerant through the electronic expansion valve 11, the refrigerant in the state enters the cold water heat exchanger 6 and is subjected to evaporation heat exchange with high-temperature cold water in the air heat exchanger component, and the evaporated low-temperature low-pressure gaseous refrigerant returns to the air suction port of the compressor component 1 to complete a complete refrigeration mode cycle.
2. Heating mode:
in the heating mode, the air conditioning unit 100 provides hot water, which controls compressor loading and unloading.
All the D ports and the E ports of the four-way reversing valves in the four-way reversing valve assembly 2 are communicated, all the C ports and the S ports are communicated, the air heat exchanger assembly 4 comprises four heat exchange modules which are all used as evaporators, the cold water heat exchanger 6 is idle, the hot water heat exchanger 5 is used as a condenser to provide hot water, the electronic expansion valve 11 is closed, the electromagnetic valve 19 is closed, all the four electromagnetic valves in the electromagnetic valve assembly 3 are opened, and all the four electronic expansion valves in the electronic expansion valve assembly 12 are opened.
The cooling circulation path in the air conditioning unit is shown in fig. 2, namely: the high-temperature high-pressure gaseous refrigerant discharged from the exhaust port of the compressor component 1 enters the hot water heat exchanger 5 through the electromagnetic valve component 3 and is subjected to condensation heat exchange with low-temperature hot water in the interior of the hot water heat exchanger, the condensed liquid refrigerant enters the economizer 9 through the liquid reservoir 7 and is supercooled in the interior of the economizer, the refrigerant in the state is throttled into a two-phase state refrigerant through the electronic expansion valve component 12, the refrigerant in the state enters the air heat exchanger component 4 and is subjected to evaporation heat exchange with high-temperature air in the interior of the air heat exchanger component, and the evaporated low-temperature low-pressure gaseous refrigerant returns to the air suction port of the compressor component 1 to complete a complete hot water mode cycle.
3. Heating priority automatic operation mode:
in the heating-preferred automatic operation mode, the air conditioning unit 100 simultaneously supplies hot water and cold water, the temperature of the hot water controls the loading and unloading of the compressor, and the temperature of the cold water controls the number of four heat exchange modules in the air heat exchanger assembly 4 as balance heat exchangers. There are the following cases:
case 1,
When the refrigerating and heating capacity of the air conditioning unit meets the cold and hot load demands of users simultaneously, the D ports and the E ports of the four-way reversing valves in the four-way reversing valve assembly 2 are all communicated, the C ports and the S ports are all communicated, the air heat exchanger assembly 4 comprises four heat exchange modules which are all idle, the cold water heat exchanger 6 is used as an evaporator to provide cold water, the hot water heat exchanger 5 is used as a condenser to provide hot water, the electronic expansion valve 11 is opened, the electromagnetic valve 19 is closed, the four electromagnetic valves in the electromagnetic valve assembly 3 are all opened, and the four electronic expansion valves in the electronic expansion valve assembly 12 are all closed.
The refrigerant circulation path in the air conditioning unit is shown in fig. 3, namely: the high-temperature high-pressure gaseous refrigerant discharged from the exhaust port of the compressor component 1 enters the hot water heat exchanger 5 through the electromagnetic valve component 3 and is subjected to condensation heat exchange with low-temperature hot water in the interior of the hot water heat exchanger, the condensed liquid refrigerant enters the economizer 9 through the liquid reservoir 7 and is supercooled in the interior of the economizer, the refrigerant in the state is throttled into a two-phase state refrigerant through the electronic expansion valve 11, the refrigerant in the state enters the cold water heat exchanger component 6 and is subjected to evaporation heat exchange with high-temperature cold water in the interior of the cold water heat exchanger, and the evaporated low-temperature low-pressure gaseous refrigerant returns to the air suction port of the compressor component 1 to complete a complete automatic mode cycle.
Case 2,
When the refrigerating capacity of the air conditioning unit meets the user demand and the hot water capacity is larger than the user demand, the D ports and the E ports of the four-way reversing valves in the four-way reversing valve assembly 2 are all communicated, the C ports and the S ports are all communicated, the air heat exchanger assembly 4 comprises four heat exchange modules which are all idle, the cold water heat exchanger 6 is used as an evaporator to provide cold water, the hot water heat exchanger 5 is used as a condenser to provide hot water, the electronic expansion valve 11 is opened, the electromagnetic valve 19 is closed, the four electromagnetic valves in the electromagnetic valve assembly 3 are all opened, and the four electronic expansion valves in the electronic expansion valve assembly 12 are all closed.
The refrigerant circulation of the air conditioning unit is the same as in the case 1, namely: the high-temperature high-pressure gaseous refrigerant discharged from the exhaust port of the compressor component 1 enters the hot water heat exchanger 5 through the electromagnetic valve component 3 and is subjected to condensation heat exchange with low-temperature hot water in the interior of the hot water heat exchanger, the condensed liquid refrigerant enters the economizer 9 through the liquid reservoir 7 and is supercooled in the interior of the economizer, the refrigerant in the state is throttled into a two-phase state refrigerant through the electronic expansion valve 11, the refrigerant in the state enters the cold water heat exchanger component 6 and is subjected to evaporation heat exchange with high-temperature cold water in the interior of the cold water heat exchanger, and the evaporated low-temperature low-pressure gaseous refrigerant returns to the air suction port of the compressor component 1 to complete a complete automatic mode cycle.
Case 3,
When the refrigerating capacity of the air conditioning unit is larger than the user demand and the hot water capacity meets the user demand, the D ports and the E ports of the four-way reversing valves in the four-way reversing valve assembly 2 are all communicated, the C ports and the S ports are all communicated, the air heat exchanger assembly 4 comprises four heat exchange modules which are partially or fully used as balance heat exchangers, the cold water heat exchanger 6 is used as an evaporator to provide cold water, the hot water heat exchanger 5 is used as a condenser to provide hot water, the electronic expansion valve 11 is opened, the electromagnetic valve 19 is closed, the four electromagnetic valves in the electromagnetic valve assembly 3 are fully opened, and the four electronic expansion valves in the electronic expansion valve assembly 12 are partially or fully opened.
The cooling circulation path in the air conditioning unit is shown in fig. 4, namely: the high-temperature high-pressure gaseous refrigerant discharged from the exhaust port of the compressor assembly 1 enters the hot water heat exchanger 5 through the electromagnetic valve assembly 3 and is subjected to condensation heat exchange with low-temperature hot water in the interior of the hot water heat exchanger, the condensed liquid refrigerant enters the economizer 9 through the liquid reservoir 7 and is subjected to supercooling in the interior of the economizer, the flow direction of the refrigerant in the state is divided into two parts, the first part is throttled into a two-phase state refrigerant through the electronic expansion valve assembly 11, the refrigerant in the state enters the cold water heat exchanger assembly 6 and is subjected to evaporation heat exchange with high-temperature cold water in the interior of the cold water heat exchanger assembly, the second part is throttled into a two-phase state refrigerant through the electronic expansion valve opened in the electronic expansion valve assembly 12, the refrigerant in the state enters the balance heat exchanger in the air heat exchanger assembly 4 and is subjected to evaporation heat exchange with high-temperature air in the interior of the balance heat exchanger, and finally, the low-temperature low-pressure gaseous refrigerants at the balance heat exchanger outlets in the cold water heat exchanger assembly 6 and the air heat exchanger assembly 4 are converged and then returned to the air suction port of the compressor assembly 1, and a complete automatic mode (hot water priority) circulation is completed.
4. Automatic operation mode with refrigeration priority:
in the automatic operation mode of the preferred cooling, the air conditioning unit 100 provides hot water and cold water simultaneously, the temperature of the cold water controls the loading and unloading of the compressor, and the hot water temperature controls the number of four heat exchange modules in the air heat exchanger assembly 4 as balance heat exchangers. There are the following cases:
case 1,
When the refrigerating and heating capacity of the air conditioning unit meets the cold and hot load demands of users, the 1 st port (D port) and the 4 th port (E port) of the four-way reversing valve in the four-way reversing valve assembly 2 are communicated, the 2 nd port (C port) and the 3 rd port (S port) are communicated, the four heat exchange modules included in the air heat exchanger assembly 4 are all idle, the cold water heat exchanger 6 is used as an evaporator to provide cold water, the hot water heat exchanger 5 is used as a condenser to provide hot water, the electronic expansion valve 11 is opened, the electromagnetic valve 19 is closed, the four electromagnetic valves in the electromagnetic valve assembly 3 are all opened, and the four electronic expansion valves in the electronic expansion valve assembly 12 are all closed.
The refrigerant circulation path in the air conditioning unit is shown in fig. 3, namely: the high-temperature high-pressure gaseous refrigerant discharged from the exhaust port 1001 of the compressor assembly 1 enters the hot water heat exchanger 5 through the electromagnetic valve assembly 3 and is condensed and heat exchanged with low-temperature hot water in the interior of the hot water heat exchanger, the condensed liquid refrigerant enters the economizer 9 through the liquid reservoir 7 and is supercooled in the interior of the economizer, the refrigerant in the state is throttled into a two-phase state refrigerant through the electronic expansion valve 11, the two-phase state refrigerant enters the cold water heat exchanger assembly 6 and is evaporated and heat exchanged with high-temperature cold water in the interior of the cold water heat exchanger assembly, and the evaporated low-temperature low-pressure gaseous refrigerant returns to the air suction port of the compressor assembly 1 to complete a complete automatic mode cycle.
Case 2,
When the heating capacity of the air conditioning unit meets the user requirement, the refrigerating capacity (i.e. cold water capacity) is greater than the user requirement, the D ports and the E ports of the four-way reversing valves in the four-way reversing valve assembly 2 are all communicated, the C ports and the S ports are all communicated, the air heat exchanger assembly 4 comprises four heat exchange modules which are all idle, the cold water heat exchanger 6 is used as an evaporator to provide cold water, the hot water heat exchanger 5 is used as a condenser to provide hot water, the electronic expansion valve 11 is opened, the electromagnetic valve 19 is closed, the four electromagnetic valves in the electromagnetic valve assembly 3 are all opened, and the four electronic expansion valves in the electronic expansion valve assembly 12 are all closed.
The refrigerant circulation of the air conditioning unit is the same as in the case 1, namely: the high-temperature high-pressure gaseous refrigerant discharged from the exhaust port 1001 of the compressor assembly 1 enters the hot water heat exchanger 5 through the electromagnetic valve assembly 3 and is condensed and heat exchanged with low-temperature hot water in the interior of the hot water heat exchanger, the condensed liquid refrigerant enters the economizer 9 through the liquid reservoir 7 and is supercooled in the interior of the economizer, the refrigerant in the state is throttled into a two-phase state refrigerant through the electronic expansion valve 11, the two-phase state refrigerant enters the cold water heat exchanger assembly 6 and is evaporated and heat exchanged with high-temperature cold water in the interior of the cold water heat exchanger assembly, and the evaporated low-temperature low-pressure gaseous refrigerant returns to the air suction port of the compressor assembly 1 to complete a complete automatic mode cycle.
Case 3,
When the heating capacity (i.e., cold water capacity) of the air conditioning unit is greater than the user demand, the refrigerating capacity (i.e., cold water capacity) satisfies the user demand, the 1 st port (D port) and the 2 nd port (C port) of some or all of the four-way reversing valves in the four-way reversing valve assembly 2 are communicated, the 3 rd port (E port) and the 4 th port (S port) are communicated, so that part or all of the four heat exchange modules included in the air heat exchanger assembly 4 serve as balance heat exchangers (i.e., the refrigerant flows to the balance heat exchangers through the 1 st port (D port) and the 2 nd port (C port) of the four-way reversing valves and flows out of the balance heat exchangers to the second one-way valve assembly 18), the cold water heat exchanger 6 serves as an evaporator to provide cold water, the hot water heat exchanger 5 serves as a condenser to provide hot water, the electronic expansion valve 11 is opened, the electromagnetic valve 19 is closed, the four electromagnetic valves in the electromagnetic valve assembly 3 are all opened, and the four electronic expansion valves in the electronic expansion valve assembly 12 are all closed. The more the number of heat exchange modules through which the refrigerant flows, the lower the temperature of the hot water, so that the controller controls the communication state of each port of each four-way reversing valve in the four-way reversing valve assembly 2 according to the heating capacity required by a user, thereby controlling the number of heat exchange modules through which the refrigerant flows and achieving the effect of controlling the temperature of the hot water.
The cooling circulation path in the air conditioning unit is shown in fig. 5, namely: the exhaust port 1001 of the compressor assembly 1 discharges a high-temperature and high-pressure gaseous refrigerant, and the refrigerant in the state has a flow direction divided into two parts, wherein the first part enters the hot water heat exchanger 5 through the electromagnetic valve assembly 3 and performs condensation heat exchange with low-temperature water in the interior of the hot water heat exchanger, and the second part enters the balance heat exchanger in the air heat exchanger assembly 4 through the four-way reversing valve assembly 2 and performs condensation heat exchange with low-temperature air in the interior of the balance heat exchanger and flows through the second one-way valve assembly 18 and the second one-way valve 14; the refrigerant flowing out of the hot water heat exchanger component 5 and the refrigerant flowing out of the second one-way valve 14 are converged and then enter the economizer 9 together and supercooled in the economizer, the refrigerant in the state is throttled into a two-phase refrigerant through the electronic expansion valve 11, the two-phase refrigerant enters the cold water heat exchanger component 6 and carries out evaporation heat exchange with high-temperature cold water in the cold water heat exchanger component, and the evaporated low-temperature low-pressure gaseous refrigerant returns to the air suction port of the compressor component 1 to complete a complete automatic mode (cold water priority) cycle.
The controller of the present application may be realized by hardware or by a combination of hardware and software. The present application relates to a computer readable program which, when executed by a logic means, enables the logic means to carry out the apparatus or constituent means described above, or enables the logic means to carry out the various methods or steps described above. The present application also relates to a storage medium such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like for storing the above program.
The various processing methods described in connection with the embodiments of the present invention in the controller may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. For example, one or more combinations of one or more of the controllers and/or the functional block diagrams may correspond to individual software modules or individual hardware modules of the computer program flow. These software modules may correspond to the respective steps. These hardware modules may be implemented, for example, by solidifying the software modules using a Field Programmable Gate Array (FPGA).
A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to the processor such that the processor can read information from, and write information to, the storage medium; or the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The software modules may be stored in the memory of the mobile terminal or in a memory card that is insertable into the mobile terminal. For example, if the apparatus (e.g., mobile terminal) employs a MEGA-SIM card of a larger capacity or a flash memory device of a larger capacity, the software module may be stored in the MEGA-SIM card or the flash memory device of a larger capacity.
One or more combinations of one or more of the corresponding functional block diagrams and/or one or more of the functions described for the controller may be implemented as a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any suitable combination thereof for performing the functions described herein. One or more of the functional block diagrams and/or one or more combinations of functional block diagrams described with respect to the controller 20 of fig. 1 may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP communication, or any other such configuration.
While the application has been described in connection with specific embodiments, it will be apparent to those skilled in the art that the description is intended to be illustrative and not limiting in scope. Various modifications and alterations of this application will occur to those skilled in the art in light of the principles of this application, and such modifications and alterations are also within the scope of this application.

Claims (15)

1. An air conditioning unit, the air conditioning unit comprising: the air conditioner comprises a compressor assembly (1), a four-way reversing valve assembly (2), an electromagnetic valve assembly (3), an air heat exchanger assembly (4), a hot water heat exchanger (5), a cold water heat exchanger (6), a liquid reservoir (7), a first electronic expansion valve (11), a first electronic expansion valve assembly (12), a first one-way valve (13), a second one-way valve (14), a third one-way valve (15), a fourth one-way valve (16), a first one-way valve assembly (17), a second one-way valve assembly (18) and an electromagnetic valve (19);
An exhaust port (1001) of the compressor assembly (1) is respectively connected with a 1 st port of the four-way reversing valve assembly (2) and an inlet (301) of the electromagnetic valve assembly (3), an air suction port (1002) of the compressor assembly (1) is respectively connected with an outlet of the first one-way valve assembly (17) and an outlet of the cold water heat exchanger (6), and an inlet of the first one-way valve assembly (17) is connected with a 3 rd port of the four-way reversing valve assembly (2);
the 2 nd port of the four-way reversing valve assembly (2) is connected with the inlet (401) of the air heat exchanger assembly (4), and the 4 th port of the four-way reversing valve assembly (2) is in a closed state relative to the external environment;
an outlet (402) of the air heat exchanger assembly (4) is connected with an outlet (121) of the first electronic expansion valve assembly (12) and an inlet of the second one-way valve assembly (18), and an outlet of the second one-way valve assembly (18) is connected with an inlet of the second one-way valve (14), an outlet of the third one-way valve (15) and an inlet (122) of the first electronic expansion valve assembly (12);
an inlet (501) of the hot water heat exchanger (5) is connected with an outlet (302) of the electromagnetic valve assembly (3), and an outlet (502) of the hot water heat exchanger (5) is connected with an inlet of the liquid reservoir (7);
The outlet of the liquid storage device (7) is respectively connected with the inlet of the first one-way valve (13) and the inlet of the electromagnetic valve (19), and the outlet of the electromagnetic valve (19) is connected with the inlet of the fourth one-way valve (16);
the outlet of the first one-way valve (13) is connected with the outlet of the second one-way valve (14), and the outlet of the first one-way valve (13) and the outlet of the second one-way valve (14) output a refrigerant to the inlet of the third one-way valve (15) and the inlet (111) of the first electronic expansion valve (11);
the inlet of the cold water heat exchanger (6) is respectively connected with the outlet of the fourth one-way valve (16) and the outlet (112) of the first electronic expansion valve (11).
2. The air conditioning unit of claim 1, wherein,
the air conditioning unit also comprises an economizer (9) and a thermal expansion valve (10),
a main side inlet (901) of the economizer (9) receives the refrigerant output by the outlet of the first one-way valve (13) and the outlet of the second one-way valve (14),
the main side outlet (902) of the economizer (9) is respectively connected with the inlet of the third one-way valve (15), the inlet (101) of the thermal expansion valve (10) and the inlet (111) of the first electronic expansion valve (11), the outlet (102) of the thermal expansion valve (10) is connected with the auxiliary side inlet (903) of the economizer (9), and the air supplementing port (1003) of the compressor assembly (1) is connected with the auxiliary side outlet (904) of the economizer (9).
3. The air conditioning unit according to claim 2, wherein,
the air conditioning unit also comprises a drying filter (8),
the inlet of the drying filter (8) is connected with the outlet of the first one-way valve (13) and the outlet of the second one-way valve (14),
the outlet of the drier-filter (8) is connected to the primary side inlet (901) of the economizer (9).
4. The air conditioning unit of claim 1, wherein,
the air conditioning unit further comprises a controller, wherein the controller controls:
-an unloading of said compressor assembly (1); and/or
A communication state among the 1 st port, the 2 nd port, the 3 rd port and the 4 th port in the four-way reversing valve assembly (2); and/or
Opening and closing of the electromagnetic valve assembly (3); and/or
Opening and closing of the first electronic expansion valve (11); and/or
Opening and closing of the first electronic expansion valve assembly (12); and/or
The electromagnetic valve (19) is opened and closed.
5. The air conditioning unit according to claim 4, wherein the controller controls such that, when the air conditioning unit is in a cooling mode:
the 1 st port and the 2 nd port of the four-way reversing valve assembly (2) are communicated, the 3 rd port and the 4 th port are communicated, the first electronic expansion valve (11) is opened, the electromagnetic valve (19) is opened, the electromagnetic valves in the electromagnetic valve assembly (3) are all closed, and the electronic expansion valves in the first electronic expansion valve assembly (12) are all closed.
6. The air conditioning unit according to claim 4, wherein the controller controls such that, when the air conditioning unit is in a heating mode:
the 1 st port and the 4 th port of the four-way reversing valve assembly (2) are communicated, the 2 nd port and the 3 rd port are communicated, the first electronic expansion valve (11) is closed, the electromagnetic valve (19) is closed, the electromagnetic valves in the electromagnetic valve assembly (3) are all opened, and the electronic expansion valves in the first electronic expansion valve assembly (12) are all opened.
7. The air conditioning unit according to claim 4, wherein the air conditioning unit heats and cools simultaneously when the air conditioning unit is in an automatic operation mode of heating priority, the controller controlling such that:
the 1 st port and the 4 th port of the four-way reversing valve assembly (2) are communicated, the 2 nd port and the 3 rd port are communicated, the first electronic expansion valve (11) is opened, the electromagnetic valve (19) is closed, and all electromagnetic valves in the electromagnetic valve assembly (3) are opened;
and, the controller controls each electronic expansion valve in the first electronic expansion valve assembly (12) to be opened or closed according to the refrigerating capacity of the air conditioning unit.
8. The air conditioning unit according to claim 7, wherein, when the air conditioning unit is in a heating-priority automatic operation mode,
when the refrigerating capacity of the air conditioning unit is larger than the set refrigerating capacity, the controller controls at least part of electronic expansion valves in the first electronic expansion valve assembly (12) to be opened.
9. The air conditioning unit according to claim 4, wherein the air conditioning unit heats and cools simultaneously when the air conditioning unit is in a cooling-preferred automatic operation mode, the controller controlling such that:
the electronic expansion valves in the first electronic expansion valve assembly (12) are all closed, the first electronic expansion valve (11) is opened, the electromagnetic valve (19) is closed, and the electromagnetic valve in the electromagnetic valve assembly (3) is all opened;
and the controller controls the four-way reversing valve assembly (2) according to the heating capacity of the air conditioning unit: the 1 st port and the 4 th port are communicated, and the 2 nd port and the 3 rd port are communicated; or the 1 st port and the 2 nd port are conducted, and the 3 rd port and the 4 th port are conducted.
10. The air conditioning unit according to claim 9, wherein, when the air conditioning unit is in a cooling-priority automatic operation mode,
When the heating capacity of the air conditioning unit is larger than the set heating capacity, the controller controls the 1 st port and the 2 nd port of at least part of four-way reversing valves in the four-way reversing valve assembly (2) to be conducted, and the 3 rd port and the 4 th port to be conducted.
11. A control method of an air conditioning unit, the air conditioning unit comprising: the air conditioner comprises a compressor assembly (1), a four-way reversing valve assembly (2), an electromagnetic valve assembly (3), an air heat exchanger assembly (4), a hot water heat exchanger (5), a cold water heat exchanger (6), a liquid reservoir (7), a first electronic expansion valve (11), a first electronic expansion valve assembly (12), a first one-way valve (13), a second one-way valve (14), a third one-way valve (15), a fourth one-way valve (16), a first one-way valve assembly (17), a second one-way valve assembly (18), an electromagnetic valve (19) and a controller;
an exhaust port (1001) of the compressor assembly (1) is respectively connected with a 1 st port of the four-way reversing valve assembly (2) and an inlet (301) of the electromagnetic valve assembly (3), an air suction port (1002) of the compressor assembly (1) is respectively connected with an outlet of the first one-way valve assembly (17) and an outlet of the cold water heat exchanger (6), and an inlet of the first one-way valve assembly (17) is connected with a 3 rd port of the four-way reversing valve assembly (2);
The 2 nd port of the four-way reversing valve assembly (2) is connected with the inlet (401) of the air heat exchanger assembly (4), and the 4 th port of the four-way reversing valve assembly (2) is in a closed state relative to the external environment;
an outlet (402) of the air heat exchanger assembly (4) is connected with an outlet (121) of the first electronic expansion valve assembly (12) and an inlet of the second one-way valve assembly (18), and an outlet of the second one-way valve assembly (18) is connected with an inlet of the second one-way valve (14), an outlet of the third one-way valve (15) and an inlet (122) of the first electronic expansion valve assembly (12);
an inlet (501) of the hot water heat exchanger (5) is connected with an outlet (302) of the electromagnetic valve assembly (3), and an outlet (502) of the hot water heat exchanger (5) is connected with an inlet of the liquid reservoir (7);
the outlet of the liquid storage device (7) is respectively connected with the inlet of the first one-way valve (13) and the inlet of the electromagnetic valve (19), and the outlet of the electromagnetic valve (19) is connected with the inlet of the fourth one-way valve (16);
the outlet of the first one-way valve (13) is connected with the outlet of the second one-way valve (14), and the outlet of the first one-way valve (13) and the outlet of the second one-way valve (14) output a refrigerant to the inlet of the third one-way valve (15) and the inlet (111) of the first electronic expansion valve (11);
The inlet of the cold water heat exchanger (6) is respectively connected with the outlet of the fourth one-way valve (16) and the outlet (112) of the first electronic expansion valve (11),
the control method comprises the following steps:
the controller controls according to the running mode and the running state of the air conditioning unit:
-an unloading of said compressor assembly (1); and/or
A communication state among the 1 st port, the 2 nd port, the 3 rd port and the 4 th port in the four-way reversing valve assembly (2); and/or
Opening and closing of the electromagnetic valve assembly (3); and/or
Opening and closing of the first electronic expansion valve (11); and/or
Opening and closing of the first electronic expansion valve assembly (12); and/or
The electromagnetic valve (19) is opened and closed.
12. The control method of an air conditioning unit according to claim 11, wherein the controller controls such that, when the air conditioning unit is in a cooling mode:
the 1 st port and the 2 nd port of the four-way reversing valve assembly (2) are communicated, the 3 rd port and the 4 th port are communicated, the first electronic expansion valve (11) is opened, the electromagnetic valve (19) is opened, the electromagnetic valves in the electromagnetic valve assembly (3) are all closed, and the electronic expansion valves in the first electronic expansion valve assembly (12) are all closed.
13. The control method of an air conditioning unit according to claim 11, wherein the controller controls such that, when the air conditioning unit is in a heating mode:
the 1 st port and the 4 th port of the four-way reversing valve assembly (2) are communicated, the 2 nd port and the 3 rd port are communicated, the first electronic expansion valve (11) is closed, the electromagnetic valve (19) is closed, the electromagnetic valves in the electromagnetic valve assembly (3) are all opened, and the electronic expansion valves in the first electronic expansion valve assembly (12) are all opened.
14. The control method of an air conditioning unit according to claim 11, wherein the air conditioning unit heats and cools simultaneously when the air conditioning unit is in an automatic operation mode in which heating is prioritized, the controller controls such that:
the 1 st port and the 4 th port of the four-way reversing valve assembly (2) are communicated, the 2 nd port and the 3 rd port are communicated, the first electronic expansion valve (11) is opened, the electromagnetic valve (19) is closed, and all electromagnetic valves in the electromagnetic valve assembly (3) are opened;
and, the controller controls each electronic expansion valve in the first electronic expansion valve assembly (12) to be opened or closed according to the refrigerating capacity of the air conditioning unit.
15. The control method of an air conditioning unit according to claim 11, wherein the air conditioning unit heats and cools simultaneously when the air conditioning unit is in an automatic operation mode in which cooling is prioritized, the controller controls such that:
the electronic expansion valves in the first electronic expansion valve assembly (12) are all closed, the first electronic expansion valve (11) is opened, the electromagnetic valve (19) is closed, and the electromagnetic valve in the electromagnetic valve assembly (3) is all opened;
and the controller controls the four-way reversing valve assembly (2) according to the heating capacity of the air conditioning unit: the 1 st port and the 4 th port are communicated, and the 2 nd port and the 3 rd port are communicated; or the 1 st port and the 2 nd port are conducted, and the 3 rd port and the 4 th port are conducted.
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