CN107192158B - Enthalpy increasing system of air conditioner and fixed-frequency air conditioner with enthalpy increasing system - Google Patents
Enthalpy increasing system of air conditioner and fixed-frequency air conditioner with enthalpy increasing system Download PDFInfo
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- CN107192158B CN107192158B CN201710441741.7A CN201710441741A CN107192158B CN 107192158 B CN107192158 B CN 107192158B CN 201710441741 A CN201710441741 A CN 201710441741A CN 107192158 B CN107192158 B CN 107192158B
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- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- 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
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- 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
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- 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
- F25B2500/00—Problems to be solved
- F25B2500/05—Cost reduction
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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 provides an enthalpy increasing system of an air conditioner and a fixed-frequency air conditioner with the enthalpy increasing system. The enthalpy increasing system of the air conditioner comprises: the compressor is provided with an air supplementing port, the flash generator is provided with an air outlet, one end of the air supplementing pipeline is communicated with the air supplementing port, the other end of the air supplementing pipeline is communicated with the air outlet, and the flash generator supplements air to the compressor through the air supplementing pipeline. The mechanical valve is arranged on the air supplementing pipeline, and the opening of the mechanical valve is adjustably arranged according to the pressure difference at the two ends of the mechanical valve. The mechanical valve is arranged on the air supplementing pipeline between the compressor and the flash evaporator, and the mechanical valve is controlled by utilizing the pressure of the refrigerant in the air supplementing pipeline, so that the opening of the mechanical valve can be adjusted in real time according to the pressure working condition in the pipeline of the air conditioner system, and the heating and refrigerating performances of the air conditioner are effectively improved. Simultaneously, can avoid the solenoid valve among the prior art to need additionally to set up mainboard and connecting wire and cause the high problem of air conditioner manufacturing cost. The production cost of the air conditioner with the enthalpy increasing system is effectively reduced.
Description
Technical Field
The invention relates to the technical field of air conditioner equipment, in particular to an enthalpy increasing system of an air conditioner and a fixed-frequency air conditioner with the enthalpy increasing system.
Background
The traditional fixed-frequency air conditioner usually adopts a single-stage compression system, and the reason is that the structure is simple and the cost is low. However, in the ultra-high temperature and ultra-low temperature areas, the single-stage compressor has a low refrigerant flow rate and greatly reduces the capacity due to a large pressure ratio during operation. Compared with the conventional system, the two-stage compression air supplementing enthalpy increasing system has the advantages of small compression ratio, low exhaust temperature, high refrigeration efficiency and the like. However, the two-stage compression enthalpy-increasing system needs to realize enthalpy-increasing control by an electronic expansion valve, a temperature sensing bulb, an electromagnetic two-way valve, a control main board and the like. Moreover, the method is only applied to variable frequency air conditioners at present. The fixed-frequency air conditioner has the advantages that the structure is simple, and if the control scheme of the frequency converter is adopted to realize enthalpy increasing control, the parts such as a temperature sensing bulb, an electromagnetic valve, a main board, a connecting wire and the like are required to be added, so that the air conditioner has the conditions of high production cost, low production efficiency, poor economic benefit and the like.
In general, the enthalpy-increasing circulation system is controlled by adopting a combination mode of an electromagnetic stop valve, a temperature sensing bulb and a control board, so that the enthalpy-increasing system has a complex structure, special software control logic is required to be arranged, the cost is high, the control is complex, and the after-sale installation and maintenance are inconvenient. Especially, the setting mode of the stop valve adopted in the prior art enables the stop valve in the enthalpy increasing system to be in a closed state or in an open state, namely, the opening degree of the stop valve cannot be adjusted by adopting the setting mode of the stop valve in the prior art, and the problem of poor refrigeration or heating of the air conditioner is easily caused.
Disclosure of Invention
The invention mainly aims to provide an enthalpy increasing system of an air conditioner and a fixed-frequency air conditioner with the enthalpy increasing system, so as to solve the problem of poor refrigeration or heating of the air conditioner in the enthalpy increasing system in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided an enthalpy increasing system of an air conditioner, including: a compressor having a gas supply port; a flash device having an exhaust port; one end of the air supplementing pipeline is communicated with the air supplementing port, the other end of the air supplementing pipeline is communicated with the air outlet, and the flash evaporator is used for supplementing air by introducing a refrigerant into the compressor through the air supplementing pipeline; the mechanical valve is arranged on the air supplementing pipeline, and the opening of the mechanical valve is adjustably arranged according to the pressure difference at the two ends of the mechanical valve.
Further, the design pressure parameter of the mechanical valve when the opening degree of the mechanical valve is fully opened is obtained by the following formula:
wherein K is a pressure design parameter; p1 is a low pressure design pressure; p2 is the high pressure design pressure; p0 is a design pressure parameter of the mechanical valve when the opening of the mechanical valve is fully opened.
Further, the opening degree of the mechanical valve is obtained by the following formula: m= (Px-P0)/a, where M is the opening of the mechanical valve; px is a real-time pressure value of one end of the air supplementing pipeline, which is close to the flash generator; a is a mechanical valve design parameter.
Further, when M is less than or equal to-1, the mechanical valve is in a closed state; when M is more than-1 and less than 0, the mechanical valve is in a partial opening state according to the pressure value of the air supplementing pipeline; when 0.ltoreq.M, the mechanical valve is in a fully open state.
Further, a is more than or equal to 0.05 and less than or equal to 0.2, wherein a is a mechanical valve design parameter.
Further, K is more than or equal to 0.95 and less than or equal to 1.05, wherein K is a pressure design parameter.
Further, the refrigerant comprises one of R410A, R, R32, R290 and R134 a; wherein, when the refrigerant is R410A, P1 is less than or equal to 1.0MPa and less than or equal to 1.3MPa, or when the refrigerant is R22, P1 is less than or equal to 0.6MPa and less than or equal to 0.8MPa, or when the refrigerant is R32, P1 is less than or equal to 1.0MPa, or when the refrigerant is R290, P1 is less than or equal to 0.5MPa and less than or equal to 0.8MPa, or when the refrigerant is R134a, P1 is less than or equal to 0.3MPa and less than or equal to 0.5MPa.
Further, when the refrigerant is R410A, P2 is 3.0MPa or less and 3.9MPa or, when the refrigerant is R22, P2 is 1.9MPa or less and 2.5MPa or, when the refrigerant is R32, P2 is 3.1MPa or less and 4.0MPa or, when the refrigerant is R290, P2 is 1.7MPa or less and 2.2MPa or, when the refrigerant is R134a, P2 is 1.3MPa or less and 1.7MPa.
Further, when the refrigerant is R410A, P0 is 1.6MPa or less and 2.4MPa or, when the refrigerant is R22, P0 is 1.0MPa or less and 1.5MPa or, when the refrigerant is R32, P0 is 1.6MPa or less and 2.4MPa or, when the refrigerant is R290, P0 is 0.8MPa or less and 1.4MPa or, when the refrigerant is R134a, P0 is 0.5MPa or less and 1.0MPa.
Further, the compressor is a multi-stage compressor.
According to another aspect of the invention, a fixed-frequency air conditioner is provided, which comprises an air conditioner enthalpy increasing system, wherein the air conditioner enthalpy increasing system is the air conditioner enthalpy increasing system.
By applying the technical scheme of the invention, the mechanical valve is arranged on the air supplementing pipeline between the compressor and the flash evaporator, and the mechanical valve is controlled by utilizing the pressure of the refrigerant in the air supplementing pipeline, so that the opening degree of the mechanical valve can be adjusted in real time according to the pressure working condition in the pipeline of the air conditioner system, and the heating and refrigerating performances of the air conditioner are effectively improved. Meanwhile, the problem that the production cost of the air conditioner is high due to the fact that a main board and a connecting line are additionally arranged in the electromagnetic valve in the prior art can be avoided. By adopting the enthalpy increasing system of the air conditioner, the production cost of the air conditioner with the enthalpy increasing system can be effectively reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 shows a schematic of the structure of an embodiment of an enthalpy increasing system according to the invention;
fig. 2 shows a schematic diagram of the effect of the compressor on the enthalpy increase of the make-up air.
Wherein the above figures include the following reference numerals:
10. a compressor; 20. an evaporator; 30. a flash; 40. a condenser; 50. a throttle valve; 60. a four-way valve; 70. a mechanical valve.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and the accompanying drawings are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art, that in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and that identical reference numerals are used to designate identical devices, and thus descriptions thereof will be omitted.
As shown in fig. 1 and 2, according to an embodiment of the present invention, an enthalpy increasing system of an air conditioner is provided.
Specifically, as shown in fig. 1, the enthalpy increasing system including an air conditioner includes a compressor 10, a flash vessel 30, and a mechanical valve 70. The compressor 10 has a make-up port. The flash evaporator 30 has an exhaust port, one end of the air supply pipe is connected to the air supply port, the other end of the air supply pipe is connected to the exhaust port, and the flash evaporator supplies refrigerant into the compressor through the air supply pipe for air supply. The mechanical valve 70 is disposed on the gas-supplementing pipeline, and the opening of the mechanical valve 70 is adjustably set according to the pressure difference of the refrigerants at two ends of the mechanical valve.
In this embodiment, the mechanical valve 70 is disposed on the air-compensating pipeline between the compressor 10 and the flash evaporator 30, and the mechanical valve 70 is controlled by using the pressure of the refrigerant in the air-compensating pipeline, so that the opening of the mechanical valve 70 can be adjusted in real time according to the pressure working condition in the pipeline of the air-conditioner system, thereby effectively improving the heating and cooling performance of the air-conditioner. Meanwhile, the problem that the production cost of the air conditioner is high due to the fact that a main board and a connecting line are additionally arranged in the electromagnetic valve in the prior art can be avoided. By adopting the enthalpy increasing system of the air conditioner, the production cost of the air conditioner with the enthalpy increasing system can be effectively reduced.
The opening degree of the mechanical valve 70 is obtained by the following formula: m= (Px-P0)/a, M is the opening of the mechanical valve 70, px is the real-time pressure value of the air supply line near the end of the flash device, P0 is the design pressure parameter of the mechanical valve when the opening of the mechanical valve 70 is fully opened, and a is the design parameter of the mechanical valve 70.
When M is less than or equal to-1, the mechanical valve 70 is in a closed state, when M is less than or equal to-1 and less than 0, the mechanical valve 70 is in a partially opened state according to the pressure value of the air supplementing pipeline, and when M is less than or equal to 0, the mechanical valve 70 is in a completely opened state. The opening of the mechanical valve 70 can be adjusted according to the internal pressure in the air conditioner pipeline system, so that the opening of the mechanical valve 70 is adaptively adjusted through the mechanical valve 70, the air supplementing quantity of the system to the compressor is adjusted through the self-adaptive adjustment of the opening of the mechanical valve 70, and the overall energy efficiency of the system is improved.
Preferably, 0.05.ltoreq.a.ltoreq.0.2, where a is a mechanical valve design parameter. This arrangement can effectively improve the reliability of the mechanical valve 70 in realizing the opening degree adjustment during operation.
Specifically, P0 is obtained by the following formula:
wherein K is a pressure design parameter, P1 is a low pressure design pressure, and P2 is a high pressure design pressure. The value range of K is preferably: k is more than or equal to 0.95 and less than or equal to 1.05.
In this embodiment, the refrigerant includes one of R410A, R, R32, R290, and R134 a. Wherein, when the refrigerant is R410A, P1 is less than or equal to 1.0MPa and less than or equal to 1.3MPa, or when the refrigerant is R22, P1 is less than or equal to 0.6MPa and less than or equal to 0.8MPa, or when the refrigerant is R32, P1 is less than or equal to 1.0MPa, or when the refrigerant is R290, P1 is less than or equal to 0.5MPa and less than or equal to 0.8MPa, or when the refrigerant is R134a, P1 is less than or equal to 0.3MPa and less than or equal to 0.5MPa.
When the refrigerant is R410A, P2 is less than or equal to 3.0MPa and less than or equal to 3.9MPa, or when the refrigerant is R22, P2 is less than or equal to 1.9MPa and less than or equal to 2.5MPa, or when the refrigerant is R32, P2 is less than or equal to 3.1MPa and less than or equal to 4.0MPa, or when the refrigerant is R290, P2 is less than or equal to 1.7MPa, or when the refrigerant is R134a, P2 is less than or equal to 1.3 MPa.
When the refrigerant is R410A, P0 is less than or equal to 1.6MPa and less than or equal to 2.4MPa, or when the refrigerant is R22, P0 is less than or equal to 1.0MPa, or when the refrigerant is R32, P0 is less than or equal to 1.6MPa and less than or equal to 2.4MPa, or when the refrigerant is R290, P0 is less than or equal to 0.8MPa and less than or equal to 1.4MPa, or when the refrigerant is R134a, P0 is less than or equal to 0.5MPa and less than or equal to 1.0MPa.
In this embodiment, the design parameter a, the pressure design parameter K, the low-pressure design pressure P1, the high-pressure design pressure P2, and the pressure value P0 in the air supply line when the opening of the mechanical valve 70 is fully opened may be determined according to the type of the refrigerant introduced into the air conditioning system, so as to determine the opening M of the mechanical valve 70.
Preferably, in the present embodiment, the compressor may be a multi-stage compressor, that is, the compressor may be a two-stage compressor, which can effectively improve the cooling and heating performance of the air conditioner having the enthalpy increasing system.
The enthalpy increasing system of the air conditioner in the above embodiment may also be used in the technical field of air conditioner devices, that is, according to another aspect of the present invention, a fixed-frequency air conditioner is provided. The fixed-frequency air conditioner comprises an air conditioner enthalpy increasing system, wherein the air conditioner enthalpy increasing system is the air conditioner enthalpy increasing system in the embodiment. Specifically, the enthalpy increasing system including an air conditioner includes a compressor 10, a flash tank 30, and a mechanical valve 70. The compressor 10 has a make-up port. The flash evaporator 30 has an exhaust port, one end of the air supply line is connected to the air supply port, and the other end of the air supply line is connected to the exhaust port, and the flash evaporator supplies air to the compressor through the air supply line. The mechanical valve 70 is disposed on the gas-compensating pipe, and the opening of the mechanical valve 70 is adjustably set according to the pressure of the refrigerant in the gas-compensating pipe. The air conditioner further comprises an evaporator 20, a condenser 40, a throttle valve 50 and a four-way valve 60 which are arranged on a pipeline system of the air conditioner.
In this embodiment, the mechanical valve 70 is disposed on the air supplementing pipeline between the compressor 10 and the flash evaporator 30, and the mechanical valve 70 is controlled by using the pressure difference between the two ends of the mechanical valve, so that the opening of the mechanical valve 70 can be adjusted in real time according to the pressure working condition in the pipeline of the air conditioner system, thereby effectively improving the heating and cooling performance of the air conditioner. Meanwhile, the mechanical valve 70 is arranged, so that the problem that the production cost of the air conditioner is high due to the fact that a main board and a connecting line are additionally arranged in the electromagnetic valve in the prior art can be avoided. By adopting the enthalpy increasing system of the air conditioner, the production cost of the air conditioner with the enthalpy increasing system can be effectively reduced.
Specifically, in this embodiment, the compressor is a two-stage compressor, and in general, the enthalpy-increasing circulation system is controlled by adopting a combination manner of an electromagnetic stop valve, a temperature sensing bulb and a control board, which has a complex structure and requires to set special logic control software, so that the cost of the air conditioner is high, the control is complex, and the after-sale installation and maintenance are inconvenient.
In this embodiment, a mechanical valve is used instead of an electromagnetic shut-off valve, which automatically opens or closes the valve spool by sensing system pressure. The control process does not need to additionally increase elements such as a temperature sensing bulb, a main board and the like, reduces related control elements and electric circuits, effectively saves the production cost of the whole air conditioner, improves the production efficiency of the air conditioner, and improves the after-sale installation and maintenance efficiency of the air conditioner.
Further, the conventional electromagnetic stop valve can only realize opening and closing of the valve core, and cannot adjust the opening degree of the valve core, but the mechanical valve 70 in this embodiment can adaptively adjust the opening degree of the valve core of the mechanical valve 70 according to the pressure change of the air conditioner system, so as to adjust the air supplementing amount of the enthalpy increasing system of the air conditioner, and make the system performance in an optimal state.
The traditional electromagnetic stop valve needs power consumption, which increases the energy consumption of the system, and the mechanical valve 70 adopting pressure self-starting type does not need power consumption, thereby reducing the power consumption of the system and effectively improving the energy efficiency of the whole air conditioner.
The circulation schematic diagram of the air-supplementing enthalpy-increasing system is shown in fig. 2, and the conventional two-stage air-supplementing system senses the temperature of the outer side of the compressor, the running frequency of the compressor and controls the opening and closing time of the air-supplementing valve. The adoption of the traditional two-stage air supplementing system requires a special control main board and software control logic of the air supplementing valve, and the error opening or the error closing of the air supplementing valve is easy to cause. In the low load state, the system middle pressure is lower, and in the high load state, the system middle pressure is higher, as in fig. 1, a mechanical valve 70 is adopted, and the mechanical valve 70 controls whether the air supplementing pipe supplements air for the compressor by sensing the pressure of the refrigerant in the air conditioner system.
The enthalpy increasing system of the air conditioner in the embodiment has simple and practical structure, and does not need to be provided with a control main board to control the mechanical valve, so that the situation that the mechanical valve 70 is opened or closed by mistake does not exist. In addition, as can be derived from the air-supplementing enthalpy-increasing pressure enthalpy diagram in fig. 2, the circulation diagram of the common single-stage system is 1→2' →3' →4', the circulation diagram of the air-supplementing enthalpy-increasing system is 1→7→6→2→3→4, and when the air-supplementing enthalpy is increased, Δw=mi× (h 2-h 1) is increased relative to the power consumption of the common compressor after the air-supplementing enthalpy is opened, so that when the system is in a low-load operation condition, if the air-supplementing operation is performed on the compressor, the energy utilization of the compressor is affected, the air-supplementing operation on the compressor should be stopped, and the whole machine can be kept in an optimal operation state. However, because the air compensating valves adopted in the prior art are all voltage force switches or electronic expansion valves, the voltage force switches and the electronic expansion valves are easy to be turned off or turned on by mistake, when the air compensating is needed to be carried out on the compressor, the voltage force switches or the electronic expansion valves are in a state of being turned off by mistake, and when the air compensating is needed to be stopped on the compressor, the voltage force switches or the electronic expansion valves are in a state of being turned on by mistake, so that the energy efficiency of the whole machine is reduced. Where mi is the refrigerant flow rate, h1 is the abscissa of 1 in fig. 2, and h2 is the abscissa of 2 in fig. 2.
In addition to the foregoing, references in the specification to "one embodiment," "another embodiment," "an embodiment," etc., mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described in general terms in the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is intended that such feature, structure, or characteristic be implemented within the scope of the invention.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. An enthalpy increasing system of an air conditioner, comprising:
a compressor having a gas supply port;
a flash device having an exhaust port;
one end of the air supplementing pipeline is communicated with the air supplementing port, the other end of the air supplementing pipeline is communicated with the air exhaust port, and the flash evaporator is used for introducing a refrigerant into the compressor through the air supplementing pipeline to supplement air;
the mechanical valve is arranged on the air supplementing pipeline, and the opening of the mechanical valve is adjustably arranged according to the pressure difference at the two ends of the mechanical valve
The design pressure parameter of the mechanical valve when the opening degree of the mechanical valve is fully opened is obtained by the following formula:
k is a pressure design parameter;
p1 is a low pressure design pressure;
p2 is the high pressure design pressure;
p0 is a design pressure parameter of the mechanical valve when the opening degree of the mechanical valve is fully opened;
the opening degree of the mechanical valve is obtained by the following formula:
m= (Px-P0)/a, wherein,
m is the opening degree of the mechanical valve;
px is a real-time pressure value of the air supplementing pipeline near one end of the flash generator;
a is the design parameter of the mechanical valve;
a is more than or equal to 0.05 and less than or equal to 0.2, wherein a is the design parameter of the mechanical valve; k is more than or equal to 0.95 and less than or equal to 1.05, wherein K is a pressure design parameter.
2. The enthalpy increasing system of an air conditioner according to claim 1, wherein,
when M is less than or equal to-1, the mechanical valve is in a closed state;
when M is more than-1 and less than 0, the mechanical valve is in a partial opening state according to the pressure value of the air supplementing pipeline;
when 0.ltoreq.M, the mechanical valve is in a fully open state.
3. The enthalpy increasing system of an air conditioner according to claim 1, wherein the refrigerant includes one of R410A, R, R32, R290, R134 a;
wherein when the refrigerant is R410A, P1 is more than or equal to 1.0MPa and less than or equal to 1.3MPa, or alternatively,
when the refrigerant is R22, P1 is more than or equal to 0.6MPa and less than or equal to 0.8MPa, or alternatively,
when the refrigerant is R32, P1 is more than or equal to 1.0MPa and less than or equal to 1.3MPa, or alternatively,
when the refrigerant is R290, P1 is more than or equal to 0.5MPa and less than or equal to 0.8MPa, or alternatively,
when the refrigerant is R134a, P1 is more than or equal to 0.3MPa and less than or equal to 0.5MPa.
4. The enthalpy increasing system of an air conditioner according to claim 3,
when the refrigerant is R410A, P2 is more than or equal to 3.0MPa and less than or equal to 3.9MPa, or alternatively,
when the refrigerant is R22, P2 is more than or equal to 1.9MPa and less than or equal to 2.5MPa, or alternatively,
when the refrigerant is R32, P2 is more than or equal to 3.1MPa and less than or equal to 4.0MPa, or alternatively,
when the refrigerant is R290, P2 is more than or equal to 1.7MPa and less than or equal to 2.2MPa, or alternatively,
when the refrigerant is R134a, P2 is more than or equal to 1.3MPa and less than or equal to 1.7MPa.
5. The enthalpy-increasing system of an air conditioner according to claim 3 or 4,
when the refrigerant is R410A, P0 is more than or equal to 1.6MPa and less than or equal to 2.4MPa, or alternatively,
when the refrigerant is R22, P0 is more than or equal to 1.0MPa and less than or equal to 1.5MPa, or alternatively,
when the refrigerant is R32, P0 is more than or equal to 1.6MPa and less than or equal to 2.4MPa, or alternatively,
when the refrigerant is R290, P0 is more than or equal to 0.8MPa and less than or equal to 1.4MPa, or alternatively,
when the refrigerant is R134a, P0 is more than or equal to 0.5MPa and less than or equal to 1.0MPa.
6. The enthalpy increasing system of an air conditioner according to claim 1, wherein the compressor is a multi-stage compressor.
7. A fixed frequency air conditioner comprising an air conditioner enthalpy increasing system, wherein the air conditioner enthalpy increasing system is the air conditioner enthalpy increasing system of any one of claims 1 to 6.
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| PCT/CN2017/117908 WO2018227920A1 (en) | 2017-06-12 | 2017-12-22 | Enthalpy increasing system for air conditioner and non-inverter air conditioner having same |
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| CN107192158B (en) * | 2017-06-12 | 2023-07-14 | 珠海格力电器股份有限公司 | Enthalpy increasing system of air conditioner and fixed-frequency air conditioner with enthalpy increasing system |
| CN108087238B (en) * | 2017-11-03 | 2024-04-02 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor and air conditioning system with same |
| CN109357863A (en) * | 2018-11-26 | 2019-02-19 | 科希曼电器有限公司 | The test method of comprehensive pressure and the increasing enthalpy electronic expansion valve opening of temperature |
| CN109341153A (en) * | 2018-12-13 | 2019-02-15 | 珠海格力电器股份有限公司 | Coolant circulating system and refrigeration equipment |
| CN109579365B (en) * | 2019-01-16 | 2023-06-20 | 珠海格力电器股份有限公司 | Compressor air supplementing device and method with adjustable air supplementing amount and air conditioner |
| CN114576825B (en) * | 2020-11-30 | 2023-11-28 | 广东美的制冷设备有限公司 | Air conditioner control method, air conditioner and readable storage medium |
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| US6973797B2 (en) * | 2004-05-10 | 2005-12-13 | York International Corporation | Capacity control for economizer refrigeration systems |
| DK2417406T3 (en) * | 2009-04-09 | 2019-04-23 | Carrier Corp | Coolant vapor compression system with hot gas bypass |
| CN201837135U (en) * | 2010-07-15 | 2011-05-18 | 湖北东橙新能源科技有限公司 | Heat pump system with scroll compressor and flash tank |
| US20150300713A1 (en) * | 2012-08-24 | 2015-10-22 | Carrier Corporation | Stage transition in transcritical refrigerant vapor compression system |
| US8931288B2 (en) * | 2012-10-19 | 2015-01-13 | Lennox Industries Inc. | Pressure regulation of an air conditioner |
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| CN206944521U (en) * | 2017-06-12 | 2018-01-30 | 珠海格力电器股份有限公司 | Air conditioner increasing enthalpy system and there is its air-conditioner with fixed frequency |
| CN107192158B (en) * | 2017-06-12 | 2023-07-14 | 珠海格力电器股份有限公司 | Enthalpy increasing system of air conditioner and fixed-frequency air conditioner with enthalpy increasing system |
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