CN212961900U - Air conditioner and air conditioning system - Google Patents
Air conditioner and air conditioning system Download PDFInfo
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- CN212961900U CN212961900U CN202021383858.8U CN202021383858U CN212961900U CN 212961900 U CN212961900 U CN 212961900U CN 202021383858 U CN202021383858 U CN 202021383858U CN 212961900 U CN212961900 U CN 212961900U
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Abstract
The utility model discloses an air conditioner and an air conditioning system, a gas-liquid separator and a compressor; the compressor passes through first return air pipeline with the vapour and liquid separator is connected, the air conditioner still includes: the heater is arranged on the first gas return pipeline, and the detection device is used for detecting a liquid refrigerant in the first gas return pipeline; the detection device is positioned between the heater and the compressor, and the heater is used for heating the refrigerant when the detection device detects the liquid refrigerant. Because the outlet of the gas-liquid separator is provided with the heater and the detection device for detecting the liquid refrigerant, when the detection device detects the liquid refrigerant, the liquid refrigerant is evaporated by heating the heater, so that the liquid refrigerant is prevented from entering the compressor, the service life of the compressor is prolonged, and the heating effect of the air conditioner is improved.
Description
Technical Field
The utility model belongs to the technical field of the air conditioning technique and specifically relates to an air conditioner and air conditioning system.
Background
The multi-split air conditioner can achieve the comfortable refrigerating and heating temperature effect of people aiming at different environmental temperature ranges, but the multi-split air conditioner can achieve the obvious refrigerating effect, and under the low-temperature environmental condition, especially the ultralow-temperature condition, such as thirty degrees below zero and forty degrees below zero, the unit can easily form a large amount of liquid refrigerants to flow backwards to cause the damage of the compressor.
Accordingly, the prior art is yet to be improved and developed.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an air conditioner and air conditioning system, solved among the prior art liquid refrigerant problem that leads to the compressor damage of flowing backward.
In one aspect, an embodiment of the present invention provides an air conditioner, including: a gas-liquid separator and a compressor; the compressor passes through first return air pipeline with the vapour and liquid separator is connected, the air conditioner still includes: the heater is arranged on the first gas return pipeline, and the detection device is used for detecting a liquid refrigerant in the first gas return pipeline; the detection device is positioned between the heater and the compressor, and the heater is used for heating the refrigerant when the detection device detects the liquid refrigerant.
As a further improved technical solution, the detection device includes: the system comprises a pressure sensor for detecting the pressure value of the refrigerant and a first temperature sensor for detecting the temperature value of the refrigerant; the pressure sensor is located between the heater and the first temperature sensor.
As a further improved technical scheme, the air conditioner further comprises a liquid storage device, wherein a first end of the liquid storage device is connected with the gas-liquid separator, a second end of the liquid storage device is connected with the compressor, and the liquid storage device is located between the pressure sensor and the first temperature sensor.
As a further improved technical scheme, the air conditioner also comprises a four-way valve, a throttling device, an outdoor heat exchanger and a throttling element; the first end of the compressor is connected with the second end of the gas-liquid separator through the first gas return pipeline, the first end of the gas-liquid separator is connected with the first end of the four-way valve, the second end of the compressor is connected with the second end of the four-way valve, the first end of the throttling device is connected with the first end of the throttling element, the second end of the throttling device is connected with the first end of the outdoor heat exchanger, the second end of the outdoor heat exchanger is connected with the third end of the four-way valve, the second end of the throttling element is connected with the second end of the gas-liquid separator, and the flow direction of the throttling element is from the first end of the throttling element to the second end of the throttling element.
As a further improvement, the throttling element is an expansion valve or a capillary tube.
As a further improved technical scheme, the second end of the throttling element is connected with the second end of the gas-liquid separator through a second gas return pipeline; the air conditioner further includes a second temperature sensor provided on the second return air line.
As a further improved technical solution, when the throttling element is an expansion valve, the opening degree of the expansion valve is determined according to a pressure value measured by the pressure sensor and a temperature value measured by the second temperature sensor.
As a further improved technical solution, the air conditioner further includes a muffler disposed on the second return air pipe, and the second temperature sensor is located between the throttling element and the muffler.
As a further improved technical scheme, the air conditioner further comprises an indoor heat exchanger, and two ends of the indoor heat exchanger are respectively connected with the first end of the throttling element and the fourth end of the four-way valve; the indoor heat exchanger is a multi-connected indoor heat exchanger.
In a second aspect, an embodiment of the present invention provides an air conditioning system, including: an air conditioner as claimed in any one of the preceding claims.
Has the advantages that: the embodiment of the utility model provides an in through the export at vapour and liquid separator set up the heater and be used for detecting liquid refrigerant's detection device, when detection device detected liquid refrigerant, make liquid refrigerant evaporation through the heater heating to avoid liquid refrigerant to enter into the compressor, prolonged the life-span of compressor, improved the effect of heating of air conditioner.
Drawings
Fig. 1 is a schematic structural diagram of an air conditioner according to the present invention.
Fig. 2 is a schematic structural view of an outdoor unit of an air conditioner according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The inventor finds that the air conditioner has poor heating effect in a low-temperature environment, and particularly, a multi-split air conditioner has more refrigerants, so that the heat difficulty of an outdoor heat exchanger is increased, the liquid refrigerants are more, a gas-liquid separator cannot completely separate the gaseous refrigerants and the liquid refrigerants under the low-temperature environment, a large amount of liquid refrigerants are easily formed to flow backwards into a compressor, the compressor is damaged, and the heating effect of the multi-split air conditioner is influenced.
In order to solve the above problem, in the embodiment of the utility model provides a through the detection device who sets up the heater and be used for detecting liquid refrigerant in vapour and liquid separator's export, when detection device detects liquid refrigerant, make liquid refrigerant evaporation through the heater heating to avoid liquid refrigerant to enter into the compressor, prolonged the life-span of compressor, improved the effect of heating of air conditioner.
Various non-limiting embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, specifically, for convenience of explanation, the schematic diagram of the air conditioner is simplified to form fig. 1, the present invention provides an air conditioner, including: a gas-liquid separator 20, a compressor 30, a heater 71, and a detection device 72; the compressor 30 is connected with the gas-liquid separator 20 through a first gas return pipeline, and the heater 71 is arranged on the first gas return pipeline and can heat the refrigerant in the first gas return pipeline; the detecting device 72 is also disposed on the first air return line, and is configured to detect a liquid refrigerant in the first air return line, that is, detect whether the liquid refrigerant exists in the refrigerant in the first air return line, and normally, the refrigerant in the first air return line is a gaseous refrigerant. The heater 71 is configured to heat the refrigerant when the detection device 72 detects the liquid refrigerant. That is, when the refrigerant in the first return line has a liquid refrigerant, the refrigerant is heated by the heater 71, and the liquid refrigerant absorbs heat and is gasified into a gaseous refrigerant. When the detection device 72 detects that a liquid refrigerant exists in the refrigerant, the heater 71 is activated to heat the refrigerant, so that the liquid refrigerant is evaporated into a gaseous refrigerant, thereby preventing the liquid refrigerant from entering the compressor 30, and preventing the compressor 30 from operating and failing, or even being damaged.
The detecting device is located between the heater 71 and the compressor 72, and when the detecting device 72 detects that the liquid refrigerant is in the first gas return line, the heater 72 heats the refrigerant in the first gas return line. If a part of the liquid refrigerant is not completely heated after being heated by the heater 71, and is still detected by the detection device 72, the heating temperature of the heater 71 can be increased. If the liquid refrigerant is not detected by the detection device 72 for a while, the heating of the heater 71 may be stopped.
Specifically, the detecting device 72 is located between the heater 71 and the compressor 30, that is, after the heater 71 is turned on, the detecting device 72 detects the refrigerant heated by the heater 71, so as to determine whether the heated refrigerant has a liquid refrigerant. For example, the heating temperature of the heater 71 is set to be adjustable, and the heating temperature of the heater 71 can be increased by continuously detecting the liquid refrigerant within a period of time; if the absence of liquid refrigerant in the refrigerant is continuously detected for a certain period of time, the heating temperature of the heater 71 may be decreased until the heater 71 is turned off. Of course, the heating temperature of the heater 71 may be set to a fixed temperature, and the heater 71 may be turned on until the absence of the liquid refrigerant in the refrigerant is detected, and then the heater 71 may be turned off.
In one implementation of the embodiment of the present invention, the air conditioner further includes a four-way valve 10.
Specifically, the four-way valve 10 has four ports, which are a first port (also referred to as an S port) of the four-way valve 10, a second port (also referred to as a D port) of the four-way valve 10, a third port (also referred to as a C port) of the four-way valve 10, and a fourth port (also referred to as an E port) of the four-way valve 10. No matter under refrigeration or heating condition, the flow direction of the refrigerant in the gas-liquid separator 20 and the compressor 30 is not changed, that is, the flow direction of the refrigerant in the first gas return pipeline is not changed, in the embodiment of the present invention, the heating condition is taken as an example for explanation, and the refrigerant sequentially passes through the first end of the four-way valve 10, the first end of the gas-liquid separator 20, the second end of the gas-liquid separator 20, the heater 71, the detection device 72, the first end of the compressor 30, and the second end of the compressor 30, and flows back to the second end of the four-way valve 10.
In one implementation of the embodiment of the present invention, the air conditioner further includes a throttling device 40 and an outdoor heat exchanger 50, the third end of the four-way valve 10 is connected to the second end of the outdoor heat exchanger 50, and the first end of the outdoor heat exchanger 50 is connected to the second end of the throttling device 40. The air conditioner further comprises an indoor heat exchanger, wherein the first end of the indoor heat exchanger is connected with the fourth end of the four-way valve 10, and the second end of the indoor heat exchanger is connected with the first end of the throttling device 40. In the heating condition, the outdoor heat exchanger 50 serves as an evaporator and the indoor heat exchanger serves as a condenser. The compressor 30 compresses low-pressure gaseous refrigerant into high-pressure gaseous refrigerant, the high-pressure gaseous refrigerant is sent into the indoor heat exchanger, the high-pressure gaseous refrigerant is condensed into high-pressure liquid refrigerant through the indoor heat exchanger, the high-pressure liquid refrigerant is sent into the throttling device 40, the high-pressure liquid refrigerant is throttled through the throttling device 40 to form low-pressure liquid refrigerant, the low-pressure liquid refrigerant is sent into the outdoor heat exchanger 50, the low-pressure liquid refrigerant is sublimated into low-pressure gaseous refrigerant through the outdoor heat exchanger 50, and the low-pressure gaseous refrigerant is separated through the gas-liquid separator 20 and then sent back.
In one implementation of the embodiment of the present invention, the detection device 72 includes: a pressure sensor 721 for detecting a pressure value of the refrigerant and a first temperature sensor 722 for detecting a temperature value of the refrigerant; the pressure sensor 721 is located between the heater 71 and the first temperature sensor 722.
Specifically, whether a liquid refrigerant exists in the refrigerant is determined by the pressure value of the refrigerant (measured by the pressure sensor 721) and the temperature value of the refrigerant (measured by the first temperature sensor 722), for example, if the temperature value of the refrigerant is lower than the saturation temperature corresponding to the pressure value of the refrigerant, it is determined that the liquid refrigerant exists in the refrigerant; and if the temperature value of the refrigerant is equal to or higher than the saturation temperature corresponding to the pressure value of the refrigerant, judging that no liquid refrigerant exists in the refrigerant. If the pressure value of the refrigerant is higher than the saturation pressure corresponding to the temperature value of the refrigerant, judging that the liquid refrigerant exists in the refrigerant; and if the pressure value of the refrigerant is lower than or equal to the saturation pressure corresponding to the temperature value of the refrigerant, judging that no liquid refrigerant exists in the refrigerant. The utility model discloses an among other implementation, can also adopt other detection device, whether there is liquid refrigerant in the detection refrigerant, for example, the level gauge.
The embodiment of the utility model provides an in an implementation, after the liquid refrigerant has appeared in the refrigerant, the liquid refrigerant begins to get rid of again, enters into compressor 30 for the liquid refrigerant that prevents to have produced, the air conditioner still includes stock solution device 73, stock solution device 73's first end with vapour and liquid separator 20 connects, stock solution device 73's second end with compressor 30 connects, stock solution device 73 is located pressure sensor 721 with between the first temperature sensor 722. That is, the liquid storage device 73 divides the first gas return line into two sections, wherein the first section is used for connecting the first end of the liquid storage device 73 with the second end of the gas-liquid separator 20, and the second section is used for connecting the second end of the liquid storage device 73 with the first end of the compressor 30.
When the detection device 72 detects that a liquid refrigerant exists in the refrigerant, the generated refrigerant is stored in the liquid storage device 73, and after the heater 71 is turned on to heat the refrigerant, the heated refrigerant has a higher temperature and can exchange heat with the liquid refrigerant stored in the liquid storage device 73, and the liquid refrigerant absorbs heat and evaporates to form a gaseous refrigerant, so that the generated liquid refrigerant is prevented from entering the compressor 30.
The liquid storage device 73 can adopt a liquid storage tank, the liquid storage tank comprises a tank body, an inlet and an outlet which are arranged on the tank body, the outlet is higher, the liquid refrigerant entering from the inlet falls to the bottom of the tank body under the action of gravity, and cannot go out from the outlet, and the gaseous refrigerant entering from the inlet is smaller under the action of gravity, and can go out from the outlet, so that the effect of storing the liquid refrigerant is realized.
The liquid storage device 73 may be disposed between the heater 71 and the compressor 30, and the order of the liquid storage device 73 and the detection device 72 is not limited, but the heater 71, the detection device 72, the liquid storage device 73, and the compressor 30 may be disposed in this order, or the heater 71, the liquid storage device 73, the detection device 72, and the compressor 30 may be disposed in this order. When the detecting device 72 employs the pressure sensor 721 and the first temperature sensor 722, the reservoir 73 may be disposed between the pressure sensor 721 and the first temperature sensor 722, for example, the heater 71, the pressure sensor 721, the reservoir 73, the first temperature sensor 722, and the compressor 30 are disposed in this order, and further, the heater 71, the first temperature sensor 722, the reservoir 73, the pressure sensor 721, and the compressor 30 are disposed in this order. In other implementations of the present invention, the liquid storage device 73 can also adopt other devices with liquid storage function.
In one implementation of the embodiment of the present invention, as shown in fig. 1, the air conditioner further includes a four-way valve 10, a throttling device 40, an outdoor heat exchanger 50, and a throttling element 74; the first end of the compressor 30 is connected to the second end of the gas-liquid separator 20 through the first gas return line, the first end of the gas-liquid separator 20 is connected to the first end of the four-way valve 10, the second end of the compressor 30 is connected to the second end of the four-way valve 10, the first end of the throttling device 40 is connected to the first end of the throttling element 74, the second end of the throttling device 40 is connected to the first end of the outdoor heat exchanger 50, the second end of the outdoor heat exchanger 50 is connected to the third end of the four-way valve 10, the second end of the throttling element 74 is connected to the second end of the gas-liquid separator 20, and the flow direction of the throttling element 74 is from the first end of the throttling element 74 to the second end of the throttling element 74.
At least part of high-pressure liquid refrigerant which is not throttled by the throttling device 40 is sent to the throttling element 74, is throttled by the throttling element 74 to form low-pressure liquid refrigerant, and the low-pressure liquid refrigerant is heated by the heater 71 to be evaporated to form low-pressure gaseous refrigerant and is sent back to the compressor 30. A small part of refrigerants at the inlet of the throttling device 40 are divided by the throttling element 74, and are heated to be evaporated and supplemented with air, so that the heat exchange amount during heating is increased, and the heating effect is improved. The remaining refrigerant at the inlet of the expansion device 40 passes through the heat exchanger outside the expansion device 40 and the gas-liquid separator 20 in this order to reach the heater 71.
The throttling element 74 is a one-way throttling element, and the flow direction of the throttling element 74 is from the first end of the throttling element 74 to the second end of the throttling element 74, that is, the refrigerant in the throttling element 74 can only flow from the first end of the throttling element 74 to the second end of the throttling element 74, so the refrigerant in the gas-liquid separator 20 cannot flow to the throttling device 40 through the throttling element 74.
In one implementation of the embodiments of the present invention, the throttling element 74 is an expansion valve or a capillary tube. Of course, other throttling elements may be used for the throttling element 74.
In one implementation of the embodiment of the present invention, the second end of the throttling element 74 is connected to the second end of the gas-liquid separator 20 through a second return gas line; the air conditioner further comprises a second temperature sensor 75 arranged on the second return line, the second temperature sensor 75 being located on the second return line, i.e. between the throttling element 74 and the gas-liquid separator 20. The temperature of the refrigerant flowing out of the throttling element 74, that is, the second return pipe is detected by the second temperature sensor 75.
In one implementation of the embodiment of the present invention, in order to prevent the throttling element 74 from flowing out too much low-pressure liquid refrigerant, and the heater 71 cannot sufficiently heat the liquid refrigerant to flow into the compressor 30, the flow rate of the throttling element 74 needs to be controlled, that is, the opening degree of the throttling element 74 is adjustable, for example, when the throttling element 74 is an expansion valve, the opening degree of the expansion valve is determined according to the pressure value measured by the pressure sensor 721 and the temperature value measured by the second temperature sensor 75.
Specifically, the opening degree of the throttling element 74 is determined according to the pressure value (measured by the pressure sensor 721) of the refrigerant and the temperature value (measured by the second temperature sensor 75) of the refrigerant, for example, if the difference (or superheat degree) between the saturation temperature corresponding to the pressure value of the refrigerant and the temperature value of the refrigerant is lower than a preset temperature, it is determined that the liquid refrigerant flowing out of the throttling element 74 is too much, the opening degree of the throttling element 74 needs to be reduced, it is ensured that the refrigerant enters the compressor 30 as a gaseous refrigerant, and the liquid refrigerant is prevented from entering the compressor 30 and causing damage to the compressor 30; if the difference between the saturation temperature corresponding to the pressure value of the refrigerant and the temperature value of the refrigerant is equal to the preset temperature, the amount of the liquid refrigerant flowing out of the throttling element 74 is determined to be appropriate, and the opening degree of the throttling element 74 can be adjusted differently; if the difference between the saturation temperature corresponding to the pressure value of the refrigerant and the temperature value of the refrigerant is higher than the preset temperature, it is determined that the liquid refrigerant flowing out of the throttling element 74 is too little, and the opening degree of the throttling element 74 needs to be increased, so that more refrigerant returns to the compressor 30, and the heating effect is improved. For example, the difference between the pressure value of the refrigerant and the saturation pressure corresponding to the temperature value of the refrigerant may be determined.
In one implementation of the embodiment of the present invention, the air conditioner further includes a muffler 76 disposed on the second air return line, and the second temperature sensor 75 is located between the throttling element 74 and the muffler 76. The silencer 76 prevents the liquid refrigerant flowing out of the throttling element 74 from causing loud noise.
In one implementation manner of the embodiment of the present invention, the air conditioner further includes an indoor heat exchanger 60, and two ends of the indoor heat exchanger 60 are respectively connected to the first end of the throttling element 74 and the fourth end of the four-way valve 10; the indoor heat exchanger 60 is a multi-split indoor heat exchanger.
The utility model discloses applicable in the indoor heat exchanger of multi-split air conditioner, ensure under the ultra-low temperature condition, even if thirty degrees below zero, forty degrees below zero's adverse circumstances even, the air conditioner still can provide the operation of stably heating.
Based on the air conditioning system of above-mentioned embodiment, the utility model discloses the preferred embodiment who still provides one:
the utility model discloses an air conditioning system, include: an air conditioner as claimed in any one of the preceding claims.
It should be understood that various technical features of the above-mentioned embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features of the above-mentioned embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, the combinations should be considered as the scope of the description in the present specification.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. An air conditioner comprising: a gas-liquid separator and a compressor; the compressor passes through first return air pipeline with the vapour and liquid separator is connected, its characterized in that, the air conditioner still includes: the heater is arranged on the first gas return pipeline, and the detection device is used for detecting a liquid refrigerant in the first gas return pipeline; the detection device is positioned between the heater and the compressor, and the heater is used for heating the refrigerant when the detection device detects the liquid refrigerant.
2. The air conditioner according to claim 1, wherein the detecting means comprises: the system comprises a pressure sensor for detecting the pressure value of the refrigerant and a first temperature sensor for detecting the temperature value of the refrigerant; the pressure sensor is located between the heater and the first temperature sensor.
3. An air conditioner according to claim 2, further comprising a liquid storage device, a first end of the liquid storage device being connected to the gas-liquid separator, a second end of the liquid storage device being connected to the compressor, the liquid storage device being located between the pressure sensor and the first temperature sensor.
4. The air conditioner of claim 2, further comprising a four-way valve, a throttling device, an outdoor heat exchanger, and a throttling element; the first end of the compressor is connected with the second end of the gas-liquid separator through the first gas return pipeline, the first end of the gas-liquid separator is connected with the first end of the four-way valve, the second end of the compressor is connected with the second end of the four-way valve, the first end of the throttling device is connected with the first end of the throttling element, the second end of the throttling device is connected with the first end of the outdoor heat exchanger, the second end of the outdoor heat exchanger is connected with the third end of the four-way valve, the second end of the throttling element is connected with the second end of the gas-liquid separator, and the flow direction of the throttling element is from the first end of the throttling element to the second end of the throttling element.
5. The air conditioner of claim 4, wherein the throttling element is an expansion valve or a capillary tube.
6. The air conditioner according to claim 5, wherein the second end of the throttling element is connected with the second end of the gas-liquid separator through a second return pipe; the air conditioner further includes a second temperature sensor provided on the second return air line.
7. The air conditioner according to claim 6, wherein when the throttling element is an expansion valve, the opening degree of the expansion valve is determined based on a pressure value measured by the pressure sensor and a temperature value measured by a second temperature sensor.
8. The air conditioner of claim 6, further comprising a muffler disposed on the second return air line, the second temperature sensor being located between the throttling element and the muffler.
9. The air conditioner according to any one of claims 4 to 8, further comprising an indoor heat exchanger, wherein both ends of the indoor heat exchanger are respectively connected to the first end of the throttling element and the fourth end of the four-way valve; the indoor heat exchanger is a multi-connected indoor heat exchanger.
10. An air conditioning system, comprising: the air conditioner as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021383858.8U CN212961900U (en) | 2020-07-14 | 2020-07-14 | Air conditioner and air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021383858.8U CN212961900U (en) | 2020-07-14 | 2020-07-14 | Air conditioner and air conditioning system |
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| Publication Number | Publication Date |
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| CN212961900U true CN212961900U (en) | 2021-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021383858.8U Active CN212961900U (en) | 2020-07-14 | 2020-07-14 | Air conditioner and air conditioning system |
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| CN (1) | CN212961900U (en) |
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