CN219243956U - Air conditioner - Google Patents
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- CN219243956U CN219243956U CN202320082213.8U CN202320082213U CN219243956U CN 219243956 U CN219243956 U CN 219243956U CN 202320082213 U CN202320082213 U CN 202320082213U CN 219243956 U CN219243956 U CN 219243956U
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Abstract
The utility model provides an air conditioner which comprises a compressor, a four-way valve, an indoor heat exchanger, an outdoor heat exchanger, a hot gas bypass pipe, a flash evaporator and a refrigeration one-way branch. Wherein, the four-way valve is connected with the compressor; the indoor heat exchanger is connected with the four-way valve; the outdoor heat exchanger is connected with the four-way valve; the hot gas bypass pipe is connected with the indoor heat exchanger and is arranged at the bottom of the outdoor heat exchanger; the hot gas bypass pipe is connected to a refrigerant inlet of the flash evaporator through a first refrigerant branch, a refrigerant outlet of the flash evaporator is connected to the outdoor heat exchanger through a second refrigerant branch, and an air outlet of the flash evaporator is connected to the compressor; the input end of the refrigeration unidirectional branch is communicated with the second refrigerant branch, and the output end of the refrigeration unidirectional branch is communicated with the first refrigerant branch. The utility model provides an air conditioner, which can reduce the pressure loss of the air conditioner in a refrigeration mode and simultaneously reduce liquid refrigerant entering an air outlet.
Description
Technical Field
The utility model relates to the technical field of air conditioners, in particular to an air conditioner.
Background
At present, when an air conditioning system heats and runs under a low-temperature condition, the air suction and exhaust quantity of a compressor is insufficient, so that the heating quantity of an indoor heat exchanger is greatly reduced. Therefore, an air conditioning system with enhanced vapor injection is adopted to improve heating capacity, a medium-pressure gaseous refrigerant is taken as a supplementary gas of a chamber compressor through a flash evaporator, but in a refrigeration mode, a liquid refrigerant can pass through the flash evaporator to cause pressure loss and influence refrigeration heat exchange effect, and meanwhile, a part of liquid refrigerant enters an air outlet of the flash evaporator, and under the condition of enhanced vapor injection, the liquid refrigerant can enter the compressor to damage the compressor. Therefore, how to reduce the pressure loss of the air conditioner and the liquid refrigerant entering the air outlet in the cooling mode is a technical problem to be solved.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides an air conditioner which can reduce the pressure loss of the air conditioner in a refrigeration mode and simultaneously reduce the liquid refrigerant entering an air outlet.
The embodiment of the utility model provides an air conditioning device,
a compressor;
the four-way valve is connected with the compressor;
the indoor heat exchanger is connected with the four-way valve;
the outdoor heat exchanger is connected with the four-way valve;
the hot gas bypass pipe is connected with the indoor heat exchanger and is arranged at the bottom of the outdoor heat exchanger;
the hot gas bypass pipe is connected to a refrigerant inlet of the flash evaporator through a first refrigerant branch, a refrigerant outlet of the flash evaporator is connected to the outdoor heat exchanger through a second refrigerant branch, and an air outlet of the flash evaporator is connected to the compressor;
the input end of the refrigeration unidirectional branch is communicated with the second refrigerant branch, and the output end of the refrigeration unidirectional branch is communicated with the first refrigerant branch.
The air conditioner provided by the embodiment of the utility model has at least the following beneficial effects: the bottom of the outdoor heat exchanger is provided with the hot gas bypass pipe which is connected with the indoor heat exchanger, so that the air conditioner heats and operates in a low-temperature environment, and high-temperature refrigerant flowing out of the indoor heat exchanger flows through the hot gas bypass pipe to melt an ice layer frozen at the bottom of the outdoor heat exchanger. The outdoor heat exchanger and the hot gas bypass pipe can be directly communicated, so that liquid refrigerant flowing out of the outdoor heat exchanger can directly flow to the hot gas bypass pipe and enter the indoor heat exchanger through the refrigeration one-way branch pipe in a refrigeration mode, and the liquid refrigerant quantity entering the flash evaporator through the second refrigerant branch pipe can be reduced. The refrigerating mode can reduce the amount of the refrigerant flowing through the flash evaporator, reduce the pressure loss, reduce the occurrence of the condition that the liquid refrigerant enters the air outlet of the flash evaporator, and improve the protection of the compressor.
In the above air conditioner, the refrigerating unidirectional branch is provided with a first unidirectional valve which is conducted from the input end to the output end.
Under the refrigeration mode, the refrigerant flowing out of the outdoor heat exchanger can flow to the hot gas bypass pipe through the refrigeration one-way branch, and then flows into the indoor heat exchanger, the liquid refrigerant can directly enter the indoor heat exchanger without passing through the flash evaporator, the occurrence of pressure loss caused by flowing through the flash evaporator is reduced, and meanwhile, the liquid refrigerant flowing into the air outlet of the flash evaporator can be reduced, so that the damage of a compressor is avoided. In the heating mode, the high-temperature refrigerant flowing through the hot gas bypass pipe from the indoor heat exchanger cannot directly flow into the outdoor heat exchanger through the refrigeration one-way branch pipe and must enter the flash evaporator, so that the air suction and exhaust quantity of the compressor can be improved under the condition of operating the heating mode in a low-temperature environment, and the heating effect of the air conditioner under the low-temperature condition can be improved. Therefore, the refrigerating unidirectional branch circuit can reduce pressure loss in a refrigerating mode, can protect the compressor, and can improve the air inflow of the compressor and the heating effect in a heating mode.
In the above air conditioner, the first expansion valve is provided in the first refrigerant branch line.
The first expansion valve arranged on the first refrigerant branch can throttle the refrigerant flowing into the flash evaporator, reduce the pressure and temperature of the refrigerant, facilitate the refrigerant to evaporate and supplement air by the flash evaporator, and improve the heating effect.
In the above air conditioner, the communication point between the refrigeration unidirectional branch and the first refrigerant branch is located between the first expansion valve and the hot gas bypass pipe.
The first expansion valve is positioned between the communication point between the refrigeration one-way branch and the first refrigerant branch and the flash evaporator, so that refrigerant flows through the refrigeration one-way branch from the outdoor heat exchanger to enter the first refrigerant branch in a refrigeration mode, and can directly enter the indoor heat exchanger through the hot gas bypass pipeline without throttling through the first expansion valve, thereby improving the refrigeration efficiency. In the heating mode, the refrigerant flowing out of the hot gas bypass pipeline can only enter the flash evaporator through the first expansion valve, namely the refrigerant before entering the flash evaporator can be throttled, so that the refrigerant entering the flash evaporator is in a low-temperature and low-pressure state, and the air supplementing effect is improved.
In the above air conditioner, when the refrigerant flows from the compressor to the outdoor heat exchanger, the first expansion valve is in a closed state.
Under the condition that the refrigerant flows from the compressor to the outdoor heat exchanger, namely the air conditioner is in a refrigeration mode, the first expansion valve is closed, so that the refrigerant flowing out of the refrigeration one-way branch cannot enter the flash evaporator through the first expansion valve, only can enter the hot gas bypass pipe, the amount of the refrigerant entering the flash evaporator is reduced, the pressure loss is reduced, the condition that the liquid refrigerant enters the enthalpy supplementing pipeline of the flash evaporator is reduced, and the compressor is protected.
In the above air conditioner, a second expansion valve is provided on the second refrigerant branch.
The second expansion valve is arranged on the second refrigerant branch path, so that the refrigerant flowing out of the outdoor heat exchanger and the refrigerant flowing in of the outdoor heat exchanger can be throttled. And after the refrigerant flowing out of the outdoor heat exchanger in the refrigeration mode is throttled by the second expansion valve, the refrigerant enters the indoor heat exchanger through the hot gas bypass pipe, so that the heat exchange efficiency of the indoor heat exchanger is improved. And the refrigerant flowing out of the refrigerant outlet of the flash evaporator enters the outdoor heat exchanger after being throttled by the second expansion valve on the second refrigerant branch, thereby being beneficial to improving the heat exchange efficiency of the outdoor heat exchanger.
In the above air conditioner, the communication point between the refrigeration unidirectional branch and the second refrigerant branch is located between the second expansion valve and the refrigerant outlet of the flash evaporator.
The second expansion valve is positioned between the communication point of the refrigeration unidirectional branch and the second refrigerant branch and the outdoor heat exchanger, so that the refrigerant flowing out of the outdoor heat exchanger needs to pass through the second expansion valve for throttling and then sequentially passes through the refrigeration unidirectional branch and the hot gas bypass pipe to enter the indoor heat exchanger, and therefore, the low-temperature low-pressure refrigerant after throttling enters the indoor heat exchanger, and the heat exchange efficiency of the indoor heat exchanger is improved.
In the above air conditioner, the second refrigerant branch is further provided with a second check valve that is connected from the refrigerant outlet of the flash evaporator to the second expansion valve.
The second one-way valve is arranged between the refrigerant outlet of the flash evaporator and the second expansion valve, and the second one-way valve is communicated from the flash evaporator to the direction of the second expansion valve, so that the refrigerant flowing out of the second expansion valve cannot enter the flash evaporator from the refrigerant outlet of the flash evaporator, namely, in a refrigeration mode, the liquid refrigerant cannot pass through the flash evaporator and only can enter the refrigeration one-way branch, and further, the condition that the pressure loss is caused when the liquid refrigerant enters the flash evaporator in the refrigeration mode can be effectively reduced, and meanwhile, the liquid refrigerant can be prevented from entering the air outlet of the flash evaporator.
In the above air conditioner, the communication point between the refrigeration unidirectional branch and the second refrigerant branch is located between the second expansion valve and the second unidirectional valve.
The second one-way valve is positioned between the communication point of the refrigeration one-way branch and the second refrigerant branch and the flash evaporator, so that the refrigerant can be restrained from entering the flash evaporator from the refrigerant outlet of the flash evaporator in the refrigeration mode, the pressure loss of the air conditioner in the refrigeration mode is reduced, meanwhile, the flash evaporator is prevented from stopping running in the refrigeration mode, and the liquid refrigerant directly enters the air outlet of the flash evaporator, so that the liquid refrigerant directly enters the compressor in the heating and air supplementing process, and the compressor is damaged.
In the air conditioning device, a water receiving disc is arranged at the bottom of the outdoor heat exchanger, the hot gas bypass pipe is positioned on the water receiving disc, and the water receiving disc is provided with an icing sensor.
Under the low-temperature environment, the water adhered to the surface of the outdoor heat exchanger is melted, and is easily accumulated in a water receiving disc at the bottom of the outdoor heat exchanger to be condensed into ice, so that the operation of the air conditioner is affected. Therefore, through setting up the icing sensor at the water collector, detect whether the water collector has the icing condition, and then can auxiliary control air conditioner device flow through the steam bypass pipe with high temperature refrigerant for the steam bypass pipe that is located the water collector melts the icing in the water collector into water, the discharge of being convenient for.
Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The utility model is further described below with reference to the drawings and examples;
fig. 1 is a schematic structural view of an air conditioner according to an embodiment of the present utility model;
fig. 2 is a schematic view of an air conditioner provided with a first expansion valve according to an embodiment of the present utility model
FIG. 3 is a schematic view of an air conditioner provided with a second expansion valve according to an embodiment of the present utility model;
fig. 4 is a schematic structural view of an air conditioner according to another embodiment of the present utility model.
Detailed Description
Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.
It should be appreciated that in the description of embodiments of the present utility model, the descriptions of "first," "second," etc. are for the purpose of distinguishing between technical features only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated. "at least one" means one or more, and "a plurality" means two or more. "at least one of the following" and the like means any combination of these items, including any combination of single or plural items.
Furthermore, unless explicitly specified and limited otherwise, the term "coupled/connected" is to be interpreted broadly, as for example, being either fixedly coupled or movably coupled, being either detachably coupled or not detachably coupled, or being integrally coupled; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium.
In the description of the embodiments of the present utility model, the descriptions of the terms "one embodiment/implementation," "another embodiment/implementation," or "certain embodiments/implementations," "the above embodiments/implementations," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or examples is included in at least two embodiments or implementations of the present disclosure. In this disclosure, schematic representations of the above terms do not necessarily refer to the same illustrative embodiment or implementation. It should be noted that although a logical order is illustrated in the flowchart, in some cases, the steps illustrated or described may be performed in an order different from that in the flowchart.
The technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
The embodiment of the utility model provides an air conditioner, which is characterized in that a first refrigerant branch is connected between a refrigerant inlet of a flash evaporator and a hot gas bypass pipe, a second refrigerant branch is connected between a refrigerant outlet of the flash evaporator and an outdoor heat exchanger, and a refrigeration one-way branch which enables the second refrigerant branch to be communicated with the first refrigerant branch is arranged between the second refrigerant branch and the first refrigerant branch, so that the outdoor heat exchanger and the hot gas bypass pipe can be directly communicated, and liquid refrigerant flowing out of the outdoor heat exchanger in a refrigeration mode can directly flow to the hot gas bypass pipe and enter the indoor heat exchanger through the refrigeration one-way branch, and the amount of the liquid refrigerant entering the flash evaporator through the second refrigerant branch can be reduced. The refrigerating mode can reduce the amount of the refrigerant flowing through the flash evaporator, reduce the pressure loss, reduce the occurrence of the condition that the liquid refrigerant enters the air outlet of the flash evaporator, and improve the protection of the compressor.
Embodiments of the present utility model will be further described below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present utility model.
It is understood that the air conditioner includes a compressor 110, a four-way valve 120, an indoor heat exchanger 130, an outdoor heat exchanger 140, a hot gas bypass pipe 150, a flash evaporator 160, and a refrigerating one-way bypass 170. The four-way valve 120 is connected to an intake port and an exhaust port of the compressor 110, the indoor heat exchanger 130, and the outdoor heat exchanger 140, respectively. And one end of the hot gas bypass pipe 150 positioned at the bottom of the outdoor heat exchanger 140 is connected to the indoor heat exchanger 130, and the other end is connected to the refrigerant inlet 161 of the flash evaporator 160 through the first refrigerant bypass 220. In a low temperature environment, water formed by defrosting the surface of the outdoor heat exchanger 140 is easily condensed at the bottom of the outdoor heat exchanger 140 to form an ice layer, thereby affecting the heat exchange efficiency of the outdoor heat exchanger 140. Therefore, in the case of the air conditioner operating the heating mode, the high-temperature refrigerant flows out to the hot gas bypass pipe 150 through the indoor heat exchanger 130, so that the ice layer at the bottom of the outdoor heat exchanger 140 can be melted, and the heating effect of the air conditioner in the low-temperature environment can be improved.
The refrigerant outlet 162 of the flash evaporator 160 is connected to the outdoor heat exchanger 140 through the second refrigerant branch 230, and the air outlet 163 of the flash evaporator 160 is connected to the air supply port of the compressor 110 through the enthalpy-injection line. The input 171 of the refrigeration one-way branch 170 communicates with the second refrigerant branch 230, and the output 172 of the refrigeration one-way branch 170 communicates with the first refrigerant branch 220. Therefore, the refrigerant flowing out of the refrigerant outlet 162 of the flash evaporator 160 and the refrigerant flowing into the second refrigerant bypass path 230 from the outdoor heat exchanger 140 can flow into the cooling one-way path 170, and can flow into the first refrigerant bypass path 220 through the cooling one-way path 170, i.e., can flow into the hot gas bypass path 150. Equivalently, the outdoor heat exchanger 140 may be directly connected to the hot gas bypass pipe 150, so that in the cooling mode, the refrigerant directly flows from the compressor 110 to the outdoor heat exchanger 140, flows from the outdoor heat exchanger 140 to the second refrigerant branch 230, directly flows into the hot gas bypass pipe 150 through the cooling unidirectional branch 170, and flows into the evaporator.
Since the flash evaporator 160 is in a closed state, i.e., no liquid refrigerant is evaporated, in the cooling mode, the liquid refrigerant easily enters the enthalpy injection line connected to the compressor 110 through the air outlet 163 of the flash evaporator 160. When the air conditioning device enters the heating mode, the flash evaporator 160 is turned on, so that the liquid refrigerant in the enthalpy-injection pipeline is delivered into the compressor 110, and the compressor 110 is damaged due to the liquid impact phenomenon. In the related art air conditioner, the flash evaporator 160 is turned off in the cooling mode, the liquid refrigerant directly flows through the flash evaporator 160, and in order to prevent the liquid refrigerant from entering the compressor 110 through the flash evaporator 160, only the expansion valve or the solenoid valve is provided at the air outlet 163 of the flash evaporator 160, and the valve body is closed in the cooling mode, so that the liquid refrigerant cannot enter the compressor 110 through the air outlet 163. However, the liquid refrigerant flowing through the flash evaporator 160 causes pressure loss, which affects the refrigerating effect. Meanwhile, since the expansion valve or the solenoid valve is a valve body part, there are problems of service life and operational reliability, the situation that the valve body cannot be completely closed easily occurs, so that the liquid refrigerant enters the compressor 110 from the air outlet 163, and the compressor 110 is damaged. In the air conditioner provided by the embodiment of the utility model, the valve body for controlling the circulation of the refrigerant such as the expansion valve or the electromagnetic valve is not required to be arranged at the air outlet 163 of the flash evaporator 160, and the refrigerant can flow into the hot gas bypass pipe 150 and the indoor heat exchanger 130 without passing through the flash evaporator 160 in the refrigeration mode by arranging the refrigeration one-way branch 170, and bypass the flash evaporator 160 through the refrigeration one-way branch 170, so that the liquid refrigerant amount entering the flash evaporator 160 is reduced, the pressure loss of the air conditioner is reduced, the occurrence of the situation that the liquid refrigerant enters the compressor 110 from the air outlet 163 of the flash evaporator 160 is reduced, and the protection of the compressor 110 is improved.
It can be understood that the first check valve 200 is disposed in the unidirectional cooling branch 170, the direction of conduction of the first check valve 200 is from the input end 171 to the output end 172, that is, the unidirectional cooling branch 170 disposed between the first cooling branch 220 and the second cooling branch 230 can only flow unidirectionally, the cooling medium from the second cooling branch 230 can flow into the first cooling branch 220 through the unidirectional cooling branch 170, and the cooling medium from the first cooling branch 220 cannot flow into the second cooling branch 230 through the unidirectional cooling branch 170. The first refrigerant branch 220 is connected to the refrigerant inlet 161 of the flash evaporator 160 and the hot gas bypass pipe 150, and the second refrigerant branch 230 is connected to the refrigerant inlet 161 of the flash evaporator 160 and the outdoor heat exchanger 140.
Therefore, in the cooling mode, the refrigerant flowing into the second refrigerant branch 230 from the outdoor heat exchanger 140 may directly flow into the hot gas bypass pipe 150 through the unidirectional refrigeration branch 170, without flowing through the flash evaporator 160, so as to reduce pressure loss of the refrigerant caused by flowing through the flash evaporator 160, and reduce the cooling effect. Meanwhile, after the amount of the liquid refrigerant flowing through the flash evaporator 160 is reduced, the amount of the liquid refrigerant flowing into the air outlet 163 of the flash evaporator 160 can be further reduced, thereby protecting the compressor 110.
In the heating mode, the refrigerant flowing through the hot gas bypass pipe 150 from the indoor heat exchanger 130 cannot directly flow into the outdoor heat exchanger 140 through the refrigeration one-way branch pipe 170, and can only flow into the refrigerant inlet 161 of the flash evaporator 160 through the first refrigerant branch pipe 220 and enter the flash evaporator 160 for evaporation, so that part of liquid refrigerant is evaporated into gaseous refrigerant to enter the compressor 110 for air supplementing through the air outlet 163, and the heat exchange efficiency is improved. And the other part of the liquid refrigerant flows into the first refrigerant branch 220 through the refrigerant outlet 162 of the flash evaporator 160 and enters the outdoor heat exchanger 140 for heat exchange. The refrigerant passing through the flash evaporator 160 is in a low pressure state, and the refrigerant not passing through the flash evaporator 160 is in a high pressure state, i.e. the low pressure refrigerant flows through the second refrigerant branch 230, the high pressure refrigerant flows through the first refrigerant branch 220, and the low pressure refrigerant cannot enter the first refrigerant branch 220 through the first check valve 200, so that the refrigerant flowing out of the refrigerant outlet 162 of the flash evaporator 160 can all enter the outdoor heat exchanger 140, and the heat exchange effect is improved. Therefore, the first check valve 200 provided in the refrigeration check branch 170 can reduce the amount of liquid refrigerant flowing through the flash evaporator 160 in the refrigeration mode, reduce pressure loss, reduce the amount of liquid refrigerant flowing into the air outlet 163, and improve the air intake of the compressor 110 in the heating mode, thereby improving the heating effect.
Referring to fig. 2, fig. 2 is a schematic structural view of an air conditioner provided with a first expansion valve 180 according to an embodiment of the present utility model.
It can be appreciated that the first expansion valve 180 is disposed on the first refrigerant branch 220, so that the first expansion valve 180 can throttle the refrigerant flowing into the flash evaporator 160, reduce the pressure and temperature of the refrigerant, and facilitate the flash evaporator 160 to evaporate and supplement air for the refrigerant with low temperature and low pressure, thereby improving the heating effect.
It is understood that the communication point between the refrigeration one-way branch 170 and the first refrigerant branch 220 is located between the first expansion valve 180 and the hot gas bypass pipe 150, i.e., the first expansion valve 180 is located between the communication point between the refrigeration one-way branch 170 and the first refrigerant branch 220 and the flash evaporator 160. Therefore, in the cooling mode, the refrigerant of the second refrigerant branch 230 can directly flow into the hot gas bypass pipe 150 through the cooling unidirectional branch 170, so as to improve the cooling efficiency, and meanwhile, the refrigerant does not need to enter the first expansion valve 180 to be throttled, so that the amount of liquid refrigerant entering the flash evaporator 160 through the first expansion valve 180 is reduced. In the heating mode, the refrigerant flowing out of the hot gas bypass pipe 150 passes through the communication point between the refrigeration unidirectional branch 170 and the first refrigerant branch 220, but under the inhibition effect of unidirectional conduction of the refrigeration unidirectional branch 170, the refrigerant can only enter the flash evaporator 160 through the first expansion valve 180, so that the first expansion valve 180 can throttle the refrigerant flowing into the flash evaporator 160, thereby improving the air supplementing effect and the heating effect.
It will be appreciated that in the case where the refrigerant flows from the compressor 110 to the outdoor heat exchanger 140, that is, the air conditioner is in the cooling mode, the first expansion valve 180 is closed, so that the refrigerant flowing out of the cooling unidirectional branch 170 cannot enter the flash evaporator 160 through the first expansion valve 180, and can only enter the hot gas bypass pipe 150, thereby reducing the amount of the refrigerant entering the flash evaporator 160, reducing the pressure loss, and simultaneously reducing the occurrence of the situation that the liquid refrigerant enters the air outlet 163 of the flash evaporator 160, thereby protecting the compressor 110.
Referring to fig. 3, fig. 3 is a schematic structural view of an air conditioner provided with a second expansion valve 190 according to an embodiment of the present utility model.
It is understood that the second expansion valve 190 is provided in the second refrigerant branch 230, and the second expansion valve 190 can throttle the refrigerant flowing out of and flowing into the outdoor heat exchanger 140. In the cooling mode, the refrigerant flowing out of the outdoor heat exchanger 140 enters the indoor heat exchanger 130 through the hot gas bypass pipe 150 after being throttled by the second expansion valve 190, which helps to improve the heat exchange efficiency of the indoor heat exchanger 130. In the heating mode, the refrigerant flowing out from the refrigerant outlet 162 of the flash evaporator 160 is throttled by the second expansion valve 190 on the second refrigerant branch 230 and then enters the outdoor heat exchanger 140 to exchange heat, which is helpful for improving the heat exchange efficiency of the outdoor heat exchanger 140. Therefore, the second expansion valve 190 is provided in the second refrigerant branch 230, so that the heat exchange efficiency of the air conditioner in the cooling mode and the heating mode can be improved.
It can be understood that the communication point between the refrigeration unidirectional branch 170 and the second refrigerant branch 230 is located between the second expansion valve 190 and the refrigerant outlet 162 of the flash evaporator 160, that is, the second expansion valve 190 is located between the communication point between the refrigeration unidirectional branch 170 and the second refrigerant branch 230 and the outdoor heat exchanger 140, so that the refrigerant flowing out of the outdoor heat exchanger 140 needs to flow through the second expansion valve 190 to be throttled, and then sequentially flows through the refrigeration unidirectional branch 170 and the hot gas bypass pipe 150 to enter the indoor heat exchanger 130, and therefore, the throttled low-temperature low-pressure refrigerant enters the indoor heat exchanger 130, which is helpful for improving the heat exchange efficiency of the indoor heat exchanger 130.
It can be appreciated that the second refrigerant branch 230 is further provided with a second check valve 210, and the second check valve 210 is turned on in a direction from the refrigerant outlet 162 of the flash evaporator 160 to the second expansion valve 190, that is, the second check valve 210 is located between the refrigerant outlet 162 of the flash evaporator 160 and the second expansion valve 190, so that the refrigerant flowing out of the second expansion valve 190 is inhibited by the second check valve 210 and cannot enter the flash evaporator 160 through the refrigerant outlet 162 of the flash evaporator 160. Therefore, in the cooling mode, the liquid refrigerant cannot pass through the flash evaporator 160 and can only enter the one-way refrigeration branch 170, so that the pressure loss caused by the liquid refrigerant entering the flash evaporator 160 in the cooling mode can be effectively reduced, and the liquid refrigerant can be prevented from entering the air outlet 163 of the flash evaporator 160.
It can be appreciated that the communication point between the refrigeration unidirectional branch 170 and the second refrigerant branch 230 is located between the second expansion valve 190 and the second unidirectional valve 210, that is, the second unidirectional valve 210 is located between the communication point between the refrigeration unidirectional branch 170 and the second refrigerant branch 230 and the flash evaporator 160, so that in the refrigeration mode, the refrigerant is prevented from entering the flash evaporator 160 from the refrigerant outlet 162 of the flash evaporator 160, the pressure loss of the air conditioner in the refrigeration mode is reduced, meanwhile, the flash evaporator 160 is prevented from stopping running in the refrigeration mode, the liquid refrigerant directly enters the air outlet 163 of the flash evaporator 160, and the liquid refrigerant directly enters the compressor 110 in the heating and air supplementing process, thereby damaging the compressor 110.
It can be understood that a water receiving tray is disposed at the bottom of the outdoor heat exchanger 140, and the water receiving tray is further provided with a drain hole, and the water receiving tray is used for receiving water formed after frost on the surface of the outdoor heat exchanger 140 is defrosted, and then draining the water through the drain hole. And in a low-temperature environment, the water after defrosting is condensed into ice in the water receiving disc, so that drain holes are blocked, and the operation of the air conditioning device is influenced. Therefore, the hot gas bypass pipe 150 is disposed in the water tray, and in case of freezing of the water tray, the air conditioner can be controlled to operate the heating mode, so that the high-temperature refrigerant flows through the hot gas bypass device from the indoor heat exchanger 130, and the freezing in the water tray is melted into water, so that the water is conveniently discharged through the drain hole. Meanwhile, an icing sensor can be arranged in the water pan, and the icing sensor can detect whether icing exists in the water pan or not, so that an air conditioner operation heating mode is controlled in time, and an ice layer of the water pan at the bottom of the outdoor heat exchanger 140 is removed.
Referring to fig. 4, fig. 4 is a schematic structural view of another air conditioner according to an embodiment of the present utility model.
It will be appreciated that in the cooling mode, the refrigerant enters the four-way valve 120 from the discharge outlet of the compressor 110 and then enters the outdoor heat exchanger 140 for heat exchange. After the refrigerant flows out of the outdoor heat exchanger 140, the refrigerant enters the second expansion valve 190 to be throttled, and cannot enter the flash evaporator 160 due to the inhibition effect of the second check valve 210, but can enter the first refrigerant branch 220 only through the first check valve 200 of the refrigeration one-way branch 170. Meanwhile, in the cooling mode, the first expansion valve 180 is closed, and the refrigerant cannot pass through the first expansion valve 180, so that the refrigerant passing through the outdoor heat exchanger 140 can only enter the hot gas bypass pipe 150 through the second expansion valve 190 and the first check valve 200 and cannot enter the flash evaporator 160, thereby effectively reducing the occurrence of the condition that the liquid refrigerant enters the flash evaporator 160 in the cooling mode, further reducing the pressure loss in the cooling mode, and simultaneously reducing the amount of the refrigerant entering the air outlet 163 of the flash evaporator 160.
In the heating mode, the refrigerant enters the four-way valve 120 from the exhaust port of the compressor 110 and then enters the indoor heat exchanger 130 for heat exchange. The heat exchanged refrigerant flows into the hot gas bypass pipe 150 and then into the first refrigerant bypass 220. Because of the inhibition effect of the first check valve 200 in the refrigeration one-way branch 170, the refrigerant cannot directly enter the second expansion valve 190 through the first check valve 200, and can only enter the flash evaporator 160 for evaporation after being throttled by the first expansion valve 180, the gaseous refrigerant processed by the flash evaporator 160 enters the air supplementing port of the compressor 110 for supplementing air through the air outlet 163 of the flash evaporator 160, and the liquid refrigerant flows into the second expansion valve 190 for secondary throttling after passing through the second check valve 210, and then enters the outdoor heat exchanger 140 for heat exchange, so that the heating effect is improved.
The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.
Claims (10)
1. An air conditioning apparatus, comprising:
a compressor;
the four-way valve is connected with the compressor;
the indoor heat exchanger is connected with the four-way valve;
the outdoor heat exchanger is connected with the four-way valve;
the hot gas bypass pipe is connected with the indoor heat exchanger and is arranged at the bottom of the outdoor heat exchanger;
the hot gas bypass pipe is connected to a refrigerant inlet of the flash evaporator through a first refrigerant branch, a refrigerant outlet of the flash evaporator is connected to the outdoor heat exchanger through a second refrigerant branch, and an air outlet of the flash evaporator is connected to the compressor;
the input end of the refrigeration unidirectional branch is communicated with the second refrigerant branch, and the output end of the refrigeration unidirectional branch is communicated with the first refrigerant branch.
2. An air conditioning unit according to claim 1, wherein the refrigeration one-way branch is provided with a first one-way valve which is conducted from the input end in the direction of the output end.
3. The air conditioner according to claim 1, wherein the first refrigerant branch is provided with a first expansion valve.
4. An air conditioner according to claim 3, wherein a communication point between the refrigeration one-way branch and the first refrigerant branch is located between the first expansion valve and the hot gas bypass pipe.
5. An air conditioner according to claim 3, wherein the first expansion valve is in a closed state in a case where refrigerant flows from the compressor to the outdoor heat exchanger.
6. The air conditioner according to claim 1, wherein a second expansion valve is provided in the second refrigerant branch.
7. The air conditioner as set forth in claim 6, wherein a communication point between said refrigeration one-way branch and said second refrigerant branch is located between said second expansion valve and a refrigerant outlet of said flash evaporator.
8. The air conditioner according to claim 7, wherein the second refrigerant branch is further provided with a second check valve which is communicated from the refrigerant outlet of the flash evaporator in the direction of the second expansion valve.
9. The air conditioner as set forth in claim 8, wherein a communication point between said refrigeration check branch and said second refrigerant branch is located between said second expansion valve and said second check valve.
10. The air conditioner according to claim 1, wherein a water pan is provided at a bottom of the outdoor heat exchanger, the hot gas bypass pipe is located in the water pan, and the water pan is provided with an icing sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320082213.8U CN219243956U (en) | 2023-01-12 | 2023-01-12 | Air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320082213.8U CN219243956U (en) | 2023-01-12 | 2023-01-12 | Air conditioner |
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| CN219243956U true CN219243956U (en) | 2023-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320082213.8U Active CN219243956U (en) | 2023-01-12 | 2023-01-12 | Air conditioner |
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| CN (1) | CN219243956U (en) |
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