Air conditioner

Abstract

The embodiment of the utility model provides an air conditioner which comprises a refrigeration circulation loop and a fresh air duct, the refrigeration circulation loop comprises a compressor, a condenser, an economizer, an evaporator and a fresh air heat exchanger, and the economizer is provided with a first refrigerant input end, an air outlet, a first liquid outlet and a second liquid outlet; the first refrigerant input end is connected with the refrigerant output end of the condenser, the air outlet is connected with an air supply port of the compressor, the evaporator is connected with the first liquid outlet and an air suction port of the compressor, the fresh air heat exchanger is connected with the second liquid outlet and the air supply port of the compressor, and the fresh air heat exchanger is connected with the second liquid outlet and the air supply port of the compressor. And the fresh air heat exchanger is arranged in the fresh air duct.

Description

Technical Field

[0001] This application relates to the technical field of air conditioners, and particularly relates to an air conditioner. Background Art

[0002] In the related art, when the working load of the air conditioner is small, the compressor is prone to being in a low-frequency operation state or a frequent start-stop state for a long time, thereby causing damage to the structure of the compressor and reducing its service life. Utility Model Content

[0003] An embodiment of this application provides an air conditioner, which can prevent the compressor from being in a low-frequency operation state or a frequent start-stop state for a long time, and ensure the structural safety and service life of the compressor.

[0004] An embodiment of this application provides an air conditioner, including a refrigeration cycle circuit and a fresh air duct. The refrigeration cycle circuit includes a compressor, a condenser, an economizer, an evaporator, and a fresh air heat exchanger. The economizer has a first refrigerant input end, an air outlet, a first liquid outlet, and a second liquid outlet. The first refrigerant input end is connected to the refrigerant output end of the condenser. The air outlet is connected to the gas supplement port of the compressor. The evaporator is connected to the first liquid outlet and the suction port of the compressor. The fresh air heat exchanger is connected to the second liquid outlet and the gas supplement port of the compressor. The fresh air heat exchanger is arranged in the fresh air duct.

[0005] In some embodiments, the economizer includes an economizer housing, a first heat exchanger, and a first throttling element. A refrigerant accommodation cavity is provided inside the economizer housing. The first heat exchanger and the first throttling element are connected in parallel to the refrigerant output end of the condenser. The first heat exchanger is arranged in the refrigerant accommodation cavity and is connected to the first liquid outlet. The refrigerant output end of the first throttling element communicates with the refrigerant accommodation cavity. The refrigerant accommodation cavity communicates with the air outlet and the second liquid outlet respectively.

[0006] In some embodiments, the height of the air outlet is higher than the height of the second liquid outlet.

[0007] In some embodiments, the first liquid outlet is arranged at the top of the refrigerant accommodation cavity. The first heat exchanger is a subcooling tube. The subcooling tube passes through the top of the economizer housing and extends to the bottom of the refrigerant accommodation cavity, and then extends upward to be connected to the first liquid outlet.

[0008] In some embodiments, the air conditioner includes a first temperature sensor and a second temperature sensor. The first temperature sensor is arranged at the refrigerant inlet end of the fresh air heat exchanger and is used to detect the temperature of the refrigerant before entering the fresh air heat exchanger. The second temperature sensor is arranged at the refrigerant outlet end of the fresh air heat exchanger and is used to detect the temperature of the refrigerant after flowing out of the fresh air heat exchanger.

[0009] In some embodiments, the air conditioner includes a water receiving tray disposed in the fresh air duct and below the fresh air heat exchanger, and the water receiving tray is configured to collect the condensed water formed on the fresh air heat exchanger.

[0010] In some embodiments, the air conditioner includes a drain valve, and the water receiving tray is provided with a drain port; the drain valve is disposed at the drain port and configured to control the opening and closing of the drain port.

[0011] In some embodiments, the bottom of the fresh air heat exchanger abuts against the water receiving tray, and at least a part of the fresh air heat exchanger is immersed in the condensed water in the water receiving tray.

[0012] In some embodiments, the air conditioner includes a fresh air control valve disposed at the air inlet of the fresh air duct and configured to control the opening degree of the air inlet.

[0013] In some embodiments, the air conditioner includes a second throttling element connecting the first liquid outlet and the refrigerant input end of the evaporator.

[0014] In the embodiments of the present application, by providing an economizer, a fresh air heat exchanger and a fresh air duct, the fresh air heat exchanger is connected to the economizer and disposed in the fresh air duct; when the working load of the air conditioner is relatively small, outdoor fresh air can be introduced through the fresh air duct, and the liquid refrigerant deposited in the economizer absorbs heat from the outdoor fresh air when flowing through the fresh air heat exchanger, thereby increasing the working load of the air conditioner, avoiding the compressor from being in a low-frequency operation state or frequently starting and stopping for a long time due to too small a working load, and ensuring the structural safety and service life of the compressor. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative efforts.

[0016] Figure 1 is a connection structure diagram of an air conditioner provided by some embodiments of the present application;

[0017] Figure 2 is a refrigerant flow state diagram of the air conditioner provided by some embodiments of the present application during refrigeration.

[0018] Main Element Symbol Description:

[0019] 11 - Compressor, 12 - Condenser, 13 - Economizer, 131 - Economizer housing, 132 - First heat exchanger, 133 - First throttling element, 13a - First refrigerant input end, 13b - Air outlet, 13c - First liquid outlet, 13d - Second liquid outlet, 13e - Refrigerant accommodation cavity, 14 - Evaporator, 15 - Fresh air heat exchanger, 16 - First temperature sensor, 17 - Second temperature sensor, 18 - Second throttling element, 20 - Fresh air duct, 21 - Water receiving tray, 22 - Drain valve, 23 - Fresh air control valve, 24 - Air inlet. Detailed implementation manners

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.

[0021] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0022] "A and / or B" includes the following three combinations: only A, only B, and the combination of A and B.

[0023] The use of "suitable for" or "configured to" in the present application means open and inclusive language, which does not exclude a device suitable for or configured to perform additional tasks or steps. In addition, the use of "based on" means open and inclusive, because a process, step, calculation or other action "based on" one or more of the described conditions or values may, in practice, be based on additional conditions or values beyond the described ones.

[0024] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or demonstration". Any embodiment described as "exemplary" in this application is not necessarily to be construed as more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. In the following description, details are set forth for purposes of explanation. It should be understood that those of ordinary skill in the art can recognize that this application can be implemented without these specific details. In other instances, well-known structures and processes are not elaborated in detail so as not to obscure the description of this application with unnecessary details. Therefore, this application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed in this application.

[0025] As Figure 1 shown, an embodiment of this application provides an air conditioner, which includes a refrigeration cycle circuit and a fresh air duct 20, and can prevent the compressor 11 from being in a low-frequency operation state or a frequent start-stop state for a long time, ensuring the structural safety and service life of the compressor 11. The type of the air conditioner can be determined according to actual needs, and types with fresh air functions such as wall-mounted air conditioners, cabinet air conditioners, window air conditioners, etc. can be adopted. The embodiments of this application do not limit this.

[0026] The refrigeration cycle circuit includes a compressor 11, a condenser 12, an economizer 13, an evaporator 14, and a fresh air heat exchanger 15. Here, the economizer 13 has a first refrigerant input end 13a, an air outlet 13b, a first liquid outlet 13c, and a second liquid outlet 13d. The first refrigerant input end 13a is connected to the refrigerant output end of the condenser 12, the air outlet 13b is connected to the gas supplement port of the compressor 11, the evaporator 14 is connected to the first liquid outlet 13c and the suction port of the compressor 11, and the fresh air heat exchanger 15 is connected to the second liquid outlet 13d and the gas supplement port of the compressor 11. The fresh air heat exchanger 15 is disposed in the fresh air duct 20, and the fresh air duct 20 is used for sucking outdoor fresh air.

[0027] As Figure 1 and Figure 2 shown, when the air conditioner is refrigerating, the refrigerant output by the compressor 11 enters the economizer 13 after passing through the condenser 12. A part of the refrigerant flashes in the economizer 13 and then returns to the compressor 11 through the air outlet 13b and the suction port for gas supplement and enthalpy increase; another part of the refrigerant deposits in the economizer 13 to form a liquid-deposited refrigerant to achieve the subcooling effect in the economizer 13, and can flow into the fresh air heat exchanger 15 to exchange heat with the outdoor fresh air introduced by the fresh air duct 20; a part of the refrigerant is subcooled by the above liquid-deposited refrigerant when flowing through the economizer 13 and then enters the evaporator 14, and returns to the compressor 11 after passing through the evaporator 14.

[0028] When the working load of the air conditioner is small, outdoor fresh air can be introduced through the fresh air duct 20. When the liquid-deposited refrigerant in the economizer 13 flows through the fresh air heat exchanger 15, it absorbs heat from the outdoor fresh air, thereby increasing the working load of the air conditioner, avoiding the compressor 11 from being in a low-frequency operation state or frequently starting and stopping for a long time due to too small a working load, and ensuring the structural safety and service life of the compressor 11.

[0029] The structure of the economizer 13 can be determined according to actual needs, and the embodiments of the present application do not limit this. In some embodiments, the economizer 13 may include an economizer housing 131, a first heat exchanger 132, and a first throttling element 133. The first heat exchanger 132 and the first throttling element 133 are connected in parallel to the refrigerant output end of the condenser 12, so that a part of the refrigerant output by the condenser 12 flows to the first heat exchanger 132, and another part of the refrigerant output by the condenser 12 flows to the first throttling element 133 for throttling. A refrigerant accommodation cavity 13e is provided inside the economizer housing 131, and the refrigerant accommodation cavity 13e is communicated with the air outlet 13b and the second liquid outlet 13d respectively. The refrigerant output end of the first throttling element 133 is communicated with the refrigerant accommodation cavity 13e, so that the refrigerant throttled by the first throttling element 133 is injected into the refrigerant accommodation cavity 13e. A part of the injected refrigerant flashes and then returns to the compressor 11 through the air outlet 13b and the suction port, and another part of the injected refrigerant deposits at the bottom of the refrigerant accommodation cavity 13e to form liquid-deposited refrigerant. The first heat exchanger 132 is arranged in the refrigerant accommodation cavity 13e and connected to the first liquid outlet 13c, so that the refrigerant in the first heat exchanger 132 passes through the refrigerant accommodation cavity 13e along the first heat exchanger 132 and exchanges heat with the liquid-deposited refrigerant in the refrigerant accommodation cavity 13e to achieve subcooling. The type of the first throttling element 133 can be determined according to actual needs, and types such as a throttle valve and a capillary tube can be adopted. The embodiments of the present application do not limit this.

[0030] In some examples, the height where the air outlet 13b is located can be set to be higher than the height where the second liquid outlet 13d is located. In this way, after the gaseous refrigerant is formed by flashing in the refrigerant accommodation cavity 13e, the gaseous refrigerant can flow upward to separate from the liquid refrigerant, and then flow out of the refrigerant accommodation cavity 13e through the air outlet 13b, achieving a better gas-liquid separation effect, avoiding the liquid refrigerant from accidentally entering the compressor 11 through the suction port, and avoiding the compressor 11 from being damaged by liquid slugging.

[0031] In some examples, the first liquid outlet 13c may be disposed at the top of the refrigerant accommodation chamber 13e. The first heat exchanger 132 is a subcooling pipe. The subcooling pipe passes through the top of the economizer housing 131 and extends to the bottom of the refrigerant accommodation chamber 13e, and then extends upward to connect to the first liquid outlet 13c. In this way, the subcooling pipe can pass through the bottom area of the refrigerant accommodation chamber 13e, so that the refrigerant flowing through the subcooling pipe can exchange heat with the liquid deposited refrigerant at the bottom of the refrigerant accommodation chamber 13e, achieving the purpose of subcooling the refrigerant in the subcooling pipe.

[0032] In some embodiments, the air conditioner may include a first temperature sensor 16 and a second temperature sensor 17. The first temperature sensor 16 is disposed at the refrigerant inlet end of the fresh air heat exchanger 15 for detecting the temperature of the refrigerant before entering the fresh air heat exchanger 15. The second temperature sensor 17 is disposed at the refrigerant outlet end of the fresh air heat exchanger 15 for detecting the temperature of the refrigerant after flowing out of the fresh air heat exchanger 15. By providing the first temperature sensor 16 and the second temperature sensor 17, the temperature change of the refrigerant before and after entering the fresh air heat exchanger 15 can be detected in real time, and then the heat exchange performance of the fresh air heat exchanger 15 can be determined according to the temperature change of the refrigerant, and the air conditioner can be adjusted and controlled according to the heat exchange performance of the fresh air heat exchanger 15.

[0033] In some embodiments, the air conditioner may include a water receiving tray 21. The water receiving tray 21 is disposed in the fresh air duct 20 and below the fresh air heat exchanger 15. The water receiving tray 21 is used to collect the condensed water formed on the fresh air heat exchanger 15. By providing the water receiving tray 21, the condensed water formed on the fresh air heat exchanger 15 can be collected in time, and then the condensed water can be discharged or reused centrally.

[0034] In some examples, the air conditioner may include a drain valve 22, and the water receiving tray 21 may be provided with a drain port. The drain valve 22 is disposed at the drain port for controlling the opening and closing of the drain port. By providing the drain valve 22, when the water level of the condensed water in the water receiving tray 21 is relatively high, the drain valve 22 can be opened in time to discharge the condensed water; while when the water level of the condensed water in the water receiving tray 21 is relatively low, the drain valve 22 can be closed to avoid frequent drainage and the resulting drainage noise.

[0035] In some examples, the bottom of the fresh air heat exchanger 15 can be in contact with the water receiving tray 21, and the fresh air heat exchanger 15 is at least partially immersed in the condensed water in the water receiving tray 21. Here, the immersion degree of the fresh air heat exchanger 15 in the condensed water can be used to control the heat exchange performance of the fresh air heat exchanger 15. Exemplarily, when the heat exchange performance of the fresh air heat exchanger 15 is poor, the water level of the condensed water can be lowered, so that the contact area between the condensed water and the fresh air heat exchanger 15 is reduced, and then the contact area between the fresh air heat exchanger 15 and the outdoor fresh air is increased, thereby improving the heat exchange performance of the fresh air heat exchanger 15. Exemplarily, when a drain valve 22 is provided at the drain outlet of the water receiving tray 21, the drain valve 22 can be used to control the water level of the condensed water and the contact area between the condensed water and the fresh air heat exchanger 15, and then adjust the contact area between the fresh air heat exchanger 15 and the outdoor fresh air and the heat exchange performance of the fresh air heat exchanger 15.

[0036] In some embodiments, the air conditioner may include a fresh air control valve 23. The fresh air control valve 23 can be disposed at the air inlet 24 of the fresh air duct 20 to control the opening degree of the air inlet 24, and then adjust the air intake of the fresh air duct 20. In some examples, the bottom of the fresh air heat exchanger 15 can be in contact with the water receiving tray 21, and the fresh air heat exchanger 15 is at least partially immersed in the condensed water in the water receiving tray 21. Here, when the water level of the condensed water is low, the contact area between the condensed water and the fresh air heat exchanger 15 is large; at this time, if it is determined that the heat exchange performance of the fresh air heat exchanger 15 exceeds the demand, the opening degree of the air inlet 24 and the air intake of the fresh air duct 20 can be reduced through the fresh air control valve 23 to control the heat exchange performance of the fresh air heat exchanger 15 to a state matching the demand, and avoid excessive increase of the working load of the compressor 11. When the water level of the condensed water is high, the contact area between the condensed water and the fresh air heat exchanger 15 is large, making the heat exchange performance of the fresh air heat exchanger 15 poor; at this time, the opening degree of the air inlet 24 and the air intake of the fresh air duct 20 can be increased through the fresh air control valve 23, and the heat exchange performance of the fresh air heat exchanger 15 can be correspondingly improved.

[0037] In some embodiments, the air conditioner may include a second throttling element 18, and the second throttling element 18 is connected to the refrigerant input end of the first liquid outlet 13c and the evaporator 14. Here, the second throttling element 18 can be used to throttle the refrigerant flowing out of the first liquid outlet 13c. The type of the second throttling element 18 can be determined according to actual needs, and types such as a throttle valve and a capillary tube can be adopted. The embodiments of the present application do not limit this.

[0038] In some embodiments, the air conditioner may include an indoor air duct, the fresh air duct 20 can be communicated with the indoor air duct, and the evaporator 14 can be disposed in the indoor air duct.

[0039] The above has introduced in detail the air conditioner provided by the embodiments of the present application. Specific examples are used herein to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. An air conditioner, characterized in that, It includes a refrigeration cycle circuit and a fresh air duct. The refrigeration cycle circuit includes a compressor, a condenser, an economizer, an evaporator, and a fresh air heat exchanger. The economizer has a first refrigerant input end, an air outlet, a first liquid outlet, and a second liquid outlet. The first refrigerant input end is connected to the refrigerant output end of the condenser. The air outlet is connected to the gas supplement port of the compressor. The evaporator is connected to the first liquid outlet and the suction port of the compressor. The fresh air heat exchanger is connected to the second liquid outlet and the gas supplement port of the compressor. The fresh air heat exchanger is arranged in the fresh air duct.

2. The air conditioner according to claim 1, wherein, The economizer includes an economizer housing, a first heat exchanger, and a first throttling element. A refrigerant accommodating cavity is arranged inside the economizer housing. The first heat exchanger and the first throttling element are connected in parallel to the refrigerant output end of the condenser. The first heat exchanger is arranged in the refrigerant accommodating cavity and is connected to the first liquid outlet. The refrigerant output end of the first throttling element communicates with the refrigerant accommodating cavity. The refrigerant accommodating cavity communicates with the air outlet and the second liquid outlet respectively.

3. The air conditioner according to claim 2, wherein, The height where the air outlet is located is higher than the height where the second liquid outlet is located.

4. The air conditioner according to claim 2, characterized in that, The first liquid outlet is arranged at the top of the refrigerant accommodating cavity. The first heat exchanger is a subcooling pipe. The subcooling pipe passes through the top of the economizer housing and extends to the bottom of the refrigerant accommodating cavity, and then extends upward to be connected to the first liquid outlet.

5. The air conditioner according to claim 1, characterized in that, The air conditioner includes a first temperature sensor and a second temperature sensor. The first temperature sensor is arranged at the refrigerant inlet end of the fresh air heat exchanger and is used to detect the temperature of the refrigerant before entering the fresh air heat exchanger. The second temperature sensor is arranged at the refrigerant outlet end of the fresh air heat exchanger and is used to detect the temperature of the refrigerant after flowing out of the fresh air heat exchanger.

6. The air conditioner according to claim 1, characterized in that, The air conditioner includes a water receiving tray. The water receiving tray is arranged in the fresh air duct and is located below the fresh air heat exchanger. The water receiving tray is used to collect the condensed water formed on the fresh air heat exchanger.

7. The air conditioner according to claim 6, characterized in that, The air conditioner includes a drain valve. A drain port is provided on the water receiving tray. The drain valve is arranged at the drain port and is used to control the opening and closing of the drain port.

8. The air conditioner according to claim 6, wherein The bottom of the fresh air heat exchanger abuts against the water receiving tray, and at least part of the fresh air heat exchanger is immersed in the condensed water in the water receiving tray.

9. The air conditioner according to claim 1, characterized in that, The air conditioner includes a fresh air control valve. The fresh air control valve is arranged at the air inlet of the fresh air duct and is used to control the opening degree of the air inlet.

10. The air conditioner according to claim 1, wherein The air conditioner includes a second throttling element. The second throttling element is connected to the first liquid outlet and the refrigerant input end of the evaporator.

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