CN114353398B - Air conditioner for controlling flow path to defrost condenser and defrosting method - Google Patents
Air conditioner for controlling flow path to defrost condenser and defrosting method Download PDFInfo
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- CN114353398B CN114353398B CN202111467167.5A CN202111467167A CN114353398B CN 114353398 B CN114353398 B CN 114353398B CN 202111467167 A CN202111467167 A CN 202111467167A CN 114353398 B CN114353398 B CN 114353398B
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Abstract
The invention discloses an air conditioner for controlling a flow path to defrost a condenser, which comprises a compressor, an evaporator positioned indoors, a throttling device and a condenser positioned outdoors, a five-way valve and a three-way valve, wherein the output end and the input end of the compressor are respectively connected with a fifth communicating port and a second communicating port, the third communicating port is connected with one end of the evaporator, and the fourth communicating port and the first communicating port are respectively connected with a first port and a second port; the sixth communication port is connected with the third port, one end of the throttling device, the seventh communication port and the fourth port are connected in an intersecting manner at a node A, and the other end of the throttling device, the eighth communication port and the other end of the evaporator are connected in an intersecting manner at a node B; the first port is communicated with the third port, and the second port is communicated with the fourth port. The invention can effectively utilize the condenser flow path to defrost, and avoids the problem that the air conditioner needs to be switched into a refrigeration mode during defrosting in the prior art; the user comfort experience is improved.
Description
Technical Field
The invention belongs to the field of air conditioner defrosting, and particularly relates to an air conditioner for controlling a flow path to defrost a condenser.
Background
The problem of heating and defrosting of the air conditioner is always a problem which troubles many air conditioner developers. An evaporator in the air conditioner is positioned indoors, a condenser is positioned outdoors, after the air conditioner operates for a period of time in a heating mode, the temperature of a pipe of the outdoor condenser can be reduced to be below 0 ℃, and at the moment, water vapor in the air can begin to condense on the condenser to form a layer of frost; along with the phenomenon of frosting, the heat exchange efficiency of the condenser is reduced, and the heating effect is reduced.
When the frosting is finished to a certain degree and the temperature of the outer pipe reaches a certain temperature, in order to avoid influencing the defrosting effect, the defrosting mode is required to be started to remove the frost on the outer layer of the condenser. The defrosting of the common air conditioner is realized by stopping the air conditioner, converting a heating mode into a refrigerating mode, increasing the temperature of a condenser to defrost, and automatically exiting the defrosting mode when the temperature of an outer pipe reaches a certain temperature. Under the refrigeration mode that the defrosting process is located, the air conditioner can bring cold volume into indoor, can make room temperature reduce, influences user's travelling comfort greatly.
Disclosure of Invention
The present invention is directed to solving, at least in part, one of the problems in the related art. Therefore, the invention aims to provide an air conditioner and a defrosting method for controlling a flow path to defrost a condenser, which can effectively utilize the flow path of the condenser to defrost and avoid the problem that the air conditioner needs to be switched to a refrigeration mode during defrosting in the prior art; the user comfort experience is improved.
In order to achieve the purpose, the invention provides the following technical scheme: an air conditioner for controlling a flow path to defrost a condenser comprises a compressor, an evaporator positioned indoors, a throttling device, a condenser positioned outdoors, a five-way valve and a three-way valve, wherein the five-way valve comprises a first communicating port, a second communicating port, a third communicating port, a fourth communicating port and a fifth communicating port, and the three-way valve comprises a sixth communicating port, a seventh communicating port and an eighth communicating port; the condenser comprises a first port, a second port, a third port and a fourth port;
the output end and the input end of the compressor are respectively connected with a fifth communication port and a second communication port, the third communication port is connected with one end of the evaporator, and the fourth communication port and the first communication port are respectively connected with the first port and the second port;
the sixth communication port is connected with the third port, one end, the seventh communication port and the fourth port of the throttling device are connected in an intersecting manner at a node A, and the other end, the eighth communication port and the other end of the evaporator are connected in an intersecting manner at a node B; wherein the first port is in communication with a third port and the second port is in communication with a fourth port.
Further, when the air conditioner is in the defrosting state, the sixth communication port and the eighth communication port are in an open state, and the seventh communication port and the third communication port are in a closed state; refrigerant output by the compressor enters the condenser through the first port to be liquefied and released, and the condenser is defrosted; the liquefied refrigerant flows back to the fourth port through the three-way valve and the throttling device in sequence, and flows back to the compressor through the second port and the five-way valve.
Further, when the air conditioner is in the defrosting state, the sixth communication port and the eighth communication port are in an open state, and the seventh communication port and the third communication port are in a closed state; the refrigerant output by the compressor enters the condenser through the second port to be liquefied and released, and the condenser is defrosted; the liquefied refrigerant flows back to the third port through the throttling device and the three-way valve in sequence, and flows back to the compressor through the first port and the five-way valve.
Further, the third communication port is connected with one end of the evaporator through a stop valve.
Further, the node B is communicated with the evaporator through a solenoid valve.
Further, when the air conditioner is in a cooling state, the eighth communication port is in a closed state; the sixth communication port and the seventh communication port are in an open state, and a refrigerant output by the compressor sequentially passes through the five-way valve, the condenser and the throttling device and enters the evaporator to be evaporated, gasified and absorb heat, so that the indoor temperature is reduced; the gasified refrigerant flows back to the compressor through the five-way valve.
Further, when the air conditioner is in a heating state, the eighth communication port is in a closed state; the sixth communication port and the seventh communication port are in an open state, and the refrigerant output by the compressor enters the evaporator through the five-way valve to be liquefied and release heat, so that the indoor temperature is increased; the liquefied refrigerant flows back to the compressor through the throttling device, the condenser and the five-way valve in sequence.
Furthermore, the device also comprises a liquid storage tank, wherein the input end of the liquid storage tank is connected with the second communication port through the liquid storage tank.
A method for defrosting a condenser by adopting an air conditioner comprises the following steps:
s01: the fifth communication port and the fourth communication port are opened, the first communication port, the second communication port and the third communication port are in a closed state, and cold medium in the compressor enters the condenser through the fifth communication port, the fourth communication port and the first port to be liquefied and released heat, so that the condenser is defrosted;
s02: the sixth communication port and the eighth communication port are opened, the seventh communication port is in a closed state, and the liquefied refrigerant enters the throttling device through the sixth communication port, the eighth communication port and the node B to be decompressed;
s03: the first communicating port and the second communicating port are opened, the decompressed refrigerant sequentially enters the condenser through the fourth port to be evaporated, gasified and absorb heat, and the gasified refrigerant flows back to the compressor through the second port, the first communicating port and the second communicating port.
A method for defrosting a condenser by adopting an air conditioner comprises the following steps:
s01: the fifth communication port and the first communication port are opened, the fourth communication port, the third communication port and the second communication port are in a closed state, and cold medium in the compressor enters the condenser through the fifth communication port, the first communication port and the second port to be liquefied and released, so that the condenser is defrosted;
s02: the sixth communication port and the eighth communication port are opened, the seventh communication port is in a closed state, and the liquefied refrigerant flows back to the condenser through the throttling device, the node B, the eighth communication port and the sixth communication port to be evaporated and gasified;
s03: and the fourth communication port and the second communication port are opened, and the gasified refrigerant sequentially flows back to the compressor through the first port, the fourth communication port and the second communication port.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
(1) According to the air conditioner, the three-way valve is arranged among the condenser, the evaporator and the throttling device, a control pipeline of the air conditioner is improved, different circulation ways of refrigerants under the heating, refrigerating and defrosting states of the air conditioner are realized by controlling the opening and closing of different communication ports in the three-way valve, the defect that the indoor temperature is influenced by the fact that the air conditioner needs to be switched to a refrigerating mode when defrosting is avoided, and the air conditioner can effectively defrost without being switched to the refrigerating mode; and further, the time from starting to stable operation is reduced, and the comfortable experience of the user is improved.
(2) The stop valve and the electromagnetic valve are arranged in the defrosting device, so that a refrigerant circulation path in the defrosting process can be better controlled, and the refrigerant can not enter a pipeline near an evaporator to cause fluctuation of indoor temperature in the defrosting process; further ensure that indoor temperature keeps invariable among the defrosting process, improve user's comfortable nature and experience.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
In the drawings:
FIG. 1 is a schematic view of the connection of internal pipelines of an air conditioner according to the present invention;
reference numbers: 1. a compressor; 2. a five-way valve; 3. a condenser; 4. a three-way valve; 5. a throttling device; 6. an electromagnetic valve; 7. an evaporator; 8. a stop valve; 9. a liquid storage tank; 21. a first communication port; 22. a second communication port; 23. a third communication port; 24. a fourth communication port; 25. a fifth communication port; 31. a first port; 32. a second port; 33. a third port; 34. a fourth port; 46. a sixth communication port; 47. a seventh communication port; 48. and an eighth communication port.
Detailed Description
For a more clear understanding of the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the following description, it is to be understood that the orientations and positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "lateral", "vertical", "horizontal", "top", "bottom", "inner", "outer", "leading", "trailing", and the like are configured and operated in specific orientations based on the orientations and positional relationships shown in the drawings, and are only for convenience of describing the present invention, and do not indicate that the device or element referred to must have a specific orientation, and thus, are not to be construed as limiting the present invention.
It should also be noted that, unless expressly specified or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and encompass, for example, fixed connections as well as removable connections or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or intervening elements may also be present. The terms "first", "second", "third", etc. are merely for convenience in describing the present technical solution and are not to be construed as indicating or implying any relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
Example 1
The heating and refrigerating principle of the air conditioner in the application is the same as that in the prior art, and the simple explanation is as follows:
when the air conditioner heats, the refrigerant is pressurized by the compressor to become high-temperature and high-pressure gas, the high-temperature and high-pressure gas enters the evaporator of the indoor unit, the high-temperature and high-pressure gas is condensed, liquefied and released heat to become liquid, and meanwhile, indoor air is heated, so that the aim of increasing the indoor temperature is fulfilled. The liquefied refrigerant is decompressed by a throttling device, enters a condenser of an outdoor unit for evaporation, gasification and heat absorption to form gas, and simultaneously absorbs the heat of outdoor air; the gasified refrigerant flows back to the compressor to start the next cycle.
When the air conditioner is used for refrigeration, the refrigerant is pressurized by the compressor to form high-temperature and high-pressure gas, the high-temperature and high-pressure gas enters the condenser of the outdoor unit, the high-temperature and high-pressure gas is condensed, liquefied and released to form liquid, and meanwhile, the heat is released to the atmosphere. The liquid refrigerant is decompressed by the throttling device, enters an evaporator of the indoor unit to be evaporated, gasified and absorb heat to form gas, and simultaneously absorbs the heat of indoor air, so that the aim of reducing the indoor temperature is fulfilled; the gasified refrigerant flows back to the compressor to start the next cycle.
In order to avoid the need of switching to a refrigeration mode when defrosting is carried out in the heating process of the air conditioner, the control pipeline of the air conditioner is improved, so that the air conditioner can effectively defrost without being switched to the refrigeration mode; and further, the time from starting to stable operation is shortened, and the comfortable experience of the user is improved.
Referring to fig. 1, an air conditioner for controlling a flow path to defrost a condenser includes a compressor 1, an evaporator 7 located indoors, a throttle device 5 and a condenser 3 located outdoors, a five-way valve 2, and a three-way valve 4. The input end of the compressor 1 can be connected with the liquid storage tank 9, and the liquid storage tank 9 is used for storing the returned refrigerant and then transmitting the refrigerant to the compressor 1 for compression. The five-way valve 2 includes a first communication port 21, a second communication port 22, a third communication port 23, a fourth communication port 24, and a fifth communication port 25, and the three-way valve 4 includes a sixth communication port 46, a seventh communication port 47, and an eighth communication port 48; the condenser 3 includes a first port 31, a second port 32, a third port 33, and a fourth port 34;
the output end and the input end of the compressor 1 are connected to the fifth communication port 25 and the second communication port 22, respectively, the third communication port 23 is connected to one end of the evaporator 7, and the fourth communication port 24 and the first communication port 21 are connected to the first port 31 and the second port 32, respectively. The input end of the compressor 1 may be connected to the output port of the liquid storage tank 9, the input port of the liquid storage tank 9 is connected to the second communication port 22, and equivalently, the input port of the compressor 1 is connected to the second communication port 22 through the liquid storage tank 9.
The sixth communication port 46 is connected with the third port 33, one end of the throttling device 5, the seventh communication port 47 and the fourth port 34 are connected in an intersecting manner at a node A, and the other end of the throttling device 5, the eighth communication port 48 and the other end of the evaporator 7 are connected in an intersecting manner at a node B; the first port 31 and the third port 33 communicate with each other to form a single passage inside the refrigerant device, and the second port 32 and the fourth port 34 communicate with each other to form another passage inside the condenser 3.
In the present application, the communication ports and the ports are connected by pipes, and hereinafter, only the correspondence relationship between the communication ports and the ports will be described, and the pipes connected thereto will not be described.
When the air conditioner is in the cooling state, the eighth communication port 48 is in the closed state; the sixth communication port 46 and the seventh communication port 47 are in an open state. The specific refrigeration process is as follows: refrigerant output by the compressor 1 is divided into two paths to enter the condenser 3, wherein one path is a fifth communication port 25-a fourth communication port 24-a first port 31, and the fifth communication port 25-a first communication port 21-a second port 32; the refrigerant entering the condenser 3 is liquefied and releases heat, and the liquefied and heat-released refrigerant also enters the throttling device 5 through two paths, wherein one path is a third port 33, a sixth communication port 46, a seventh communication port 47 and a node A; the other path is a fourth port 34-node A; two paths of refrigerants are mixed at a node A and enter a throttling device 5 for pressure reduction; the decompressed refrigerant enters the evaporator 7 through the node B for evaporation and gasification, so that the room temperature is reduced; the vaporized refrigerant flows back to the reservoir tank 9 through the third communicating port 23 and the second communicating port 22.
It is worth mentioning that: the refrigerant output by the compressor 1 is divided into two paths to enter the condenser 3, and the two paths can enter the condenser 3 at the same time or one path can enter the condenser 3; the purpose of air-conditioning refrigeration in the application can be realized no matter two paths enter simultaneously or one path enters. In order to achieve better refrigeration effect, the following description in this application takes two paths of simultaneous entering as an example, when only one path of the entering into the condenser 3, the refrigerant flowing path and the refrigeration principle are the same, and will not be described in detail herein.
It should be noted that, in the five-way valve 2 of the present application, each communication port may be individually controlled to be opened or closed, and in order to match with the circulation path of the refrigerant, different states of each communication port may be controlled at different times.
When the air conditioner is in the heating state, the eighth communication port 48 is in the closed state; the sixth communication port 46 and the seventh communication port 47 are in an open state. The specific refrigeration process is as follows: the refrigerant output by the compressor 1 enters the evaporator 7 through the fifth communication port 25 and the third communication port 23 to be liquefied and release heat, so that the indoor air is raised; the liquefied refrigerant enters a throttling device 5 through a node B for pressure reduction, the refrigerant after pressure reduction is divided into two paths and enters a condenser 3 for evaporation, gasification and heat absorption to form gas, and meanwhile, the heat of outdoor air is absorbed; one path is the throttling device 5-node A-fourth port 34, and the other path is the throttling device 5-node A-seventh communication port 47-sixth communication port 46-third port 33; the gasified refrigerant also flows back to the compressor 1 through two paths, one path is the second port 32, the first communicating port 21, the second communicating port 22, the liquid storage tank 9 and the compressor 1, and the other path is the first port 31, the fourth communicating port 24, the second communicating port 22, the liquid storage tank 9 and the compressor 1.
The same principle is as follows: the decompressed refrigerant is divided into two paths to enter the condenser 3, and the two paths can enter the condenser 3 at the same time or one path can enter the condenser 3; the purpose of air conditioning heating in the application can be realized no matter two ways enter simultaneously or one way enters. In order to achieve a better heating effect, two paths of refrigerant flow are taken as an example for illustration in the present application, and when only one path of refrigerant flow enters the condenser 3, the path of refrigerant flow and the heating principle are the same, and will not be described in detail herein.
When the air conditioner is in the defrosting state, the sixth communication port 46 and the eighth communication port 48 are in the open state, and the seventh communication port 47 and the third communication port 23 are in the closed state; in this case, the refrigerant circulation includes two modes: (1) Refrigerant output by the compressor 1 enters the condenser 3 through the fifth communication port 25, the fourth communication port 24 and the first port 31 to be liquefied and released, and the condenser 3 is defrosted; the liquefied refrigerant enters the throttling device 5 through the third port 33, the sixth communication port 46, the eighth communication port 48 and the node B for pressure reduction, the pressure-reduced refrigerant enters the condenser 3 through the node a and the fourth port 34 for evaporation, gasification and heat absorption, and the gasified refrigerant flows back to the liquid storage tank 9 through the second port 32, the first communication port 21 and the second communication port 22. This process is to defrost the outside of the passage formed by the first port 31 and the third port 33.
(2) Refrigerant output by the compressor 1 enters the condenser 3 through the fifth communication port 25, the first communication port 21 and the second port 32 to be liquefied and released, and defrosting is performed on the condenser 3; the liquefied refrigerant enters the throttling device 5 through the fourth port 34-the node a for pressure reduction, the pressure-reduced refrigerant enters the condenser 3 through the node B, the eighth communication port, the sixth communication port 46 and the third port 33 for evaporation, gasification and heat absorption, and the gasified refrigerant flows back to the liquid storage tank 9 through the first port 31, the fourth communication port 24 and the second communication port 22. This process is to defrost the exterior of the channel formed by the second port 32 and the fourth port 34.
This application can realize the defrosting technology to condenser 3 different positions through the switching of each intercommunication mouth in the control five-way valve 2, through alternate operation, can realize condenser 3's complete defrosting process.
Example 2
This embodiment includes the whole structure of embodiment 1, and on this basis, a third communication port 23 is provided to connect one end of the evaporator 7 through the shutoff valve 8; the node B is communicated with the evaporator 7 through a solenoid valve 6. The stop valve 8 and the electromagnetic valve 6 are arranged in the embodiment, so that the circulation path of the refrigerant in the defrosting process can be better controlled, and the refrigerant cannot enter a pipeline near the evaporator 7 to cause fluctuation of the indoor temperature in the defrosting process. The stop valve in this embodiment can be ordinary stop valve, also can be the solenoid valve.
When the air conditioner is in the cooling state, the eighth communication port 48 is in the closed state; the sixth communication port 46 and the seventh communication port 47 are in an open state while the shutoff valve 8 and the solenoid valve 6 are open. The specific refrigeration process is as follows: the refrigerant output by the compressor 1 is divided into two paths to enter the condenser 3, wherein one path is a fifth communication port 25-a fourth communication port 24-a first port 31 in the three-way valve 4, and the other path is a fifth communication port 25-a first communication port 21-a second port 32 in the three-way valve 4; the refrigerant entering the condenser 3 is liquefied and releases heat, and the liquefied and heat-released refrigerant also enters the throttling device 5 through two paths, wherein one path is a third port 33, a sixth communication port 46, a seventh communication port 47 and a node A; the other path is a fourth port 34-node A; two paths of refrigerants are mixed at a node A and then enter a throttling device 5 for pressure reduction; at this time, because the eighth communication port 48 is disconnected, the decompressed refrigerant enters the evaporator 7 through the node B and the electromagnetic valve 6 in sequence to be evaporated and gasified, so that the room temperature is reduced; the gasified refrigerant flows back to the liquid storage tank 9 through the stop valve 8, the third communication port 23 and the second communication port 22.
When the air conditioner is in the heating state, the eighth communication port 48 is in the closed state; the sixth communication port 46 and the seventh communication port 47 are in an open state while the shutoff valve 8 and the solenoid valve 6 are open. The specific refrigeration process is as follows: refrigerant output by the compressor 1 enters the evaporator 7 through the fifth communication port 25, the third communication port 23 and the stop valve 8 to be liquefied and released heat, so that indoor air is raised; the liquefied refrigerant enters a throttling device 5 through an electromagnetic valve 6 and a node B for pressure reduction, the pressure-reduced refrigerant is divided into two paths and enters a condenser 3 for evaporation, gasification and heat absorption to form gas, and meanwhile, the heat of outdoor air is absorbed; one path is the throttling device 5-node A-fourth port 34, and the other path is the throttling device 5-node A-seventh communication port 47-sixth communication port 46-third port 33; the gasified refrigerant also flows back to the compressor 1 through two paths, one path is the second port 32, the first communicating port 21, the second communicating port 22, the liquid storage tank 9 and the compressor 1, and the other path is the first port 31, the fourth communicating port 24, the second communicating port 22, the liquid storage tank 9 and the compressor 1.
When the air conditioner is in the defrosting state, the sixth communication port 46 and the eighth communication port are in the open state, and the eighth communication port, the third communication port 23, the shutoff valve 8, and the electromagnetic valve 6 are in the closed state. The circulation path of the refrigerant is exactly the same as in embodiment 1. Meanwhile, due to the arrangement of the stop valve 8 and the electromagnetic valve 6, the refrigerant between the eighth communication port and the throttling device 5 is ensured not to flow to the part near the evaporator 7, and the indoor temperature of the evaporator 7 is ensured to be consistent.
Example 3
The method for defrosting the condenser 3 provided by the embodiment adopts the air conditioner structure in the embodiment 2, and specifically comprises the following steps:
s01: the fifth communication port 25 and the fourth communication port 24 are opened, the first communication port 21, the second communication port 22, the third communication port 23, the stop valve 8 and the electromagnetic valve 6 are in a closed state, and refrigerant in the compressor 1 enters the condenser 3 through the fifth communication port 25, the fourth communication port 24 and the first port 31 to be liquefied and released to defrost the condenser 3; note that: the defrosting at this time is to defrost the outside of the passage formed by the first port 31 and the third port 33.
S02: the sixth communication port 46 and the eighth communication port 48 are opened, the seventh communication port 47 is in a closed state, and the liquefied refrigerant enters the throttling device 5 through the sixth communication port 46, the eighth communication port 48 and the node B to be decompressed;
s03: the first communication port 21 and the second communication port 22 are opened, the decompressed refrigerant sequentially enters the condenser 3 through the fourth port 34 to be evaporated, gasified and absorb heat, and the gasified refrigerant flows back to the compressor 1 through the second port 32, the first communication port 21, and the second communication port 22.
The method for defrosting the condenser 3 provided by the embodiment adopts the air conditioner structure in the embodiment 2, and specifically comprises the following steps:
s01: the fifth communication port 25 and the first communication port 21 are opened, the fourth communication port 24, the third communication port 23 and the second communication port 22 are in a closed state, and refrigerant in the compressor 1 enters the condenser 3 through the fifth communication port 25, the first communication port 21 and the second port 32 to be liquefied and released, so that the condenser 3 is defrosted; note that: the defrosting at this time is to defrost the outside of the channel formed by the second port 32 and the fourth port 34.
S02: the sixth communication port 46 and the eighth communication port are opened, the seventh communication port 47 is in a closed state, and the liquefied refrigerant flows through the throttling device 5, the node B, the eighth communication port 48 and the sixth communication port 46 and returns to the condenser 3 to be evaporated and gasified;
s03: the fourth communication port 24 and the second communication port 22 are opened, and the vaporized refrigerant flows through the first port 31, the fourth communication port 24, and the second communication port 22 in this order and returns to the compressor 1.
In this embodiment, the defrosting process for different positions of the condenser 3 can be realized by controlling the opening and closing of each communication port in the five-way valve, and the complete defrosting process of the condenser 3 can be realized through alternate operation.
The stop valve 8 and the electromagnetic valve 6 are arranged in the embodiment, so that the circulation path of the refrigerant in the defrosting process can be better controlled, and the refrigerant cannot enter a pipeline near the evaporator 7 to cause fluctuation of the indoor temperature in the defrosting process.
The embodiment further includes a cooling step and a heating step of the air conditioner, where the cooling step and the heating step are conventional performance representations of the air conditioner, and the specific method is as described in embodiment 2, only by paying attention to orderly controlling the opening and closing of each communication port in the five-way valve, and detailed description is omitted here.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (8)
1. An air conditioner for controlling a flow path to defrost a condenser is characterized by comprising a compressor (1), an evaporator (7) located indoors, a throttling device (5) and a condenser (3) located outdoors, a five-way valve (2) and a three-way valve (4), wherein the five-way valve (2) comprises a first communication port (21), a second communication port (22), a third communication port (23), a fourth communication port (24) and a fifth communication port (25), and the three-way valve (4) comprises a sixth communication port (46), a seventh communication port (47) and an eighth communication port (48); the condenser (3) comprises a first port (31), a second port (32), a third port (33) and a fourth port (34);
the output end and the input end of the compressor (1) are respectively connected with a fifth communication port (25) and a second communication port (22), the third communication port (23) is connected with one end of the evaporator (7), and the fourth communication port (24) and the first communication port (21) are respectively connected with the first port (31) and the second port (32);
the sixth communication port (46) is connected with the third port (33), one end of the throttling device (5), the seventh communication port (47) and the fourth port (34) are connected in a crossing manner at a node A, and the other end of the throttling device (5), the eighth communication port (48) and the other end of the evaporator (7) are connected in a crossing manner at a node B; wherein the first port (31) and the third port (33) are in communication, and the second port (32) and the fourth port (34) are in communication; when the air conditioner is in a defrosting state, the sixth communication port (46) and the eighth communication port (48) are in an open state; the seventh communication port (47) and the third communication port (23) are in a closed state;
when defrosting is performed on the outside of a channel formed by the first port (31) and the third port (33), refrigerant output by the compressor (1) enters the condenser (3) through the first port (31) to be liquefied and released heat, and the condenser (3) is defrosted; the liquefied refrigerant flows back to the fourth port (34) through the three-way valve (4) and the throttling device (5) in sequence, and flows back to the compressor (1) through the second port (32) and the five-way valve (2);
when defrosting is performed on the outside of a channel formed by the second port (32) and the fourth port (34), refrigerant output by the compressor (1) enters the condenser (3) through the second port (32) to be liquefied and release heat, and the condenser (3) is defrosted; the liquefied refrigerant flows back to the third port (33) through the throttling device (5) and the three-way valve (4) in sequence, and flows back to the compressor (1) through the first port (31) and the five-way valve (2).
2. An air conditioner for controlling a flow path to defrost a condenser as claimed in claim 1, characterized in that said third communication port (23) is connected to one end of said evaporator (7) through a shut-off valve (8).
3. An air conditioner for controlling a flow path to defrost a condenser as claimed in claim 1, characterized in that said node B communicates with the evaporator (7) through a solenoid valve (6).
4. An air conditioner for controlling a flow path to defrost a condenser as claimed in claim 1, wherein said eighth communication port (48) is in a closed state when the air conditioner is in a cooling state; the sixth communication port (46) and the seventh communication port (47) are in an open state, and a refrigerant output by the compressor (1) sequentially passes through the five-way valve (2), the condenser (3) and the throttling device (5) and enters the evaporator (7) to be evaporated, gasified and heat absorbed, so that the indoor temperature is reduced; the gasified refrigerant flows back to the compressor (1) through the five-way valve (2).
5. An air conditioner for controlling a flow path to defrost a condenser as claimed in claim 1, wherein said eighth communication port (48) is in a closed state when the air conditioner is in a heating state; the sixth communication port (46) and the seventh communication port (47) are in an open state, and a refrigerant output by the compressor (1) enters the evaporator (7) through the five-way valve (2) to be liquefied and release heat, so that the indoor temperature is increased; the liquefied refrigerant flows back to the compressor (1) through the throttling device (5), the condenser (3) and the five-way valve (2) in sequence.
6. The air conditioner for controlling the flow path to defrost the condenser as claimed in claim 1, further comprising a liquid storage tank (9), wherein an input end of the liquid storage tank (9) is connected to the second communication port (22) through the liquid storage tank (9).
7. A method of defrosting a condenser using the air conditioner of claim 1, comprising the steps of:
s01: the fifth communication port (25) and the fourth communication port (24) are opened, the first communication port (21), the second communication port (22) and the third communication port (23) are in a closed state, and a refrigerant in the compressor (1) enters the condenser (3) through the fifth communication port (25), the fourth communication port (24) and the first port (31) to be liquefied and released heat, so that the condenser (3) is defrosted;
s02: the sixth communication port (46) and the eighth communication port (48) are opened, the seventh communication port (47) is in a closed state, and liquefied refrigerant enters the throttling device (5) through the sixth communication port (46), the eighth communication port (48) and the node B to be decompressed;
s03: the first communication port (21) and the second communication port (22) are opened, the decompressed refrigerant enters the condenser (3) through the fourth port (34) in sequence to be evaporated, gasified and absorb heat, and the gasified refrigerant flows back to the compressor (1) through the second port (32), the first communication port (21) and the second communication port (22).
8. A method of defrosting a condenser using the air conditioner of claim 1, comprising the steps of:
s01: the fifth communication port (25) and the first communication port (21) are opened, the fourth communication port (24), the third communication port (23) and the second communication port (22) are in a closed state, and a refrigerant in the compressor (1) enters the condenser (3) through the fifth communication port (25), the first communication port (21) and the second port (32) to be liquefied and released heat, so that the condenser (3) is defrosted;
s02: the sixth communication port (46) and the eighth communication port (48) are opened, the seventh communication port (47) is in a closed state, and the liquefied refrigerant flows through the throttling device (5), the node B, the eighth communication port (48) and the sixth communication port (46) and flows back to the condenser (3) to be evaporated and gasified;
s03: the fourth communication port (24) and the second communication port (22) are opened, and the gasified refrigerant flows back to the compressor (1) through the first port (31), the fourth communication port (24) and the second communication port (22) in sequence.
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| CN203785351U (en) * | 2014-01-27 | 2014-08-20 | 平武臣 | Heat exchanging system with serial defrosting loop of air conditioner or heat pump |
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| JPH02223778A (en) * | 1989-02-23 | 1990-09-06 | Fujitsu General Ltd | Defrosting device for air-conditioning machine |
| US5105629A (en) * | 1991-02-28 | 1992-04-21 | Parris Jesse W | Heat pump system |
| KR101319687B1 (en) * | 2011-10-27 | 2013-10-17 | 엘지전자 주식회사 | Multi type air conditioner and method of controlling the same |
| CN104515319B (en) * | 2013-09-30 | 2017-04-12 | 珠海格力电器股份有限公司 | Air conditioning system |
| CN103759456B (en) * | 2014-01-27 | 2016-09-28 | 平武臣 | A kind of air-conditioning or the heat-exchange system of heat pump and Defrost method thereof |
| WO2019146070A1 (en) * | 2018-01-26 | 2019-08-01 | 三菱電機株式会社 | Refrigeration cycle device |
| CN109579387B (en) * | 2019-01-11 | 2021-01-15 | 北京机械设备研究所 | Defrosting method of air source heat pump system based on single-outside heat exchanger multi-branch alternate defrosting |
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| CN203785351U (en) * | 2014-01-27 | 2014-08-20 | 平武臣 | Heat exchanging system with serial defrosting loop of air conditioner or heat pump |
| CN206929911U (en) * | 2017-06-30 | 2018-01-26 | 广东志高暖通设备股份有限公司 | A kind of air-conditioner control system and air-conditioning equipment |
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