CN210320728U - Refrigerating system of multi-split air conditioner and air conditioner - Google Patents
Refrigerating system of multi-split air conditioner and air conditioner Download PDFInfo
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- CN210320728U CN210320728U CN201921202958.3U CN201921202958U CN210320728U CN 210320728 U CN210320728 U CN 210320728U CN 201921202958 U CN201921202958 U CN 201921202958U CN 210320728 U CN210320728 U CN 210320728U
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Abstract
The utility model provides a refrigerating system and air conditioner of many online air conditioners relates to air conditioner technical field. Refrigerating system who ally oneself with many online air conditioners, first vapour and liquid separator and second vapour and liquid separator including series connection setting, first vapour and liquid separator's access connection to cross valve, first vapour and liquid separator's export with second vapour and liquid separator's access connection, second vapour and liquid separator's exit connection to compressor. Many online air conditioner's refrigerating system and air conditioner, through setting up first vapour and liquid separator and second vapour and liquid separator and establish ties, the refrigerant can be through twice gas-liquid separation before getting into the compressor to reduce the content of liquid refrigerant in the compressor return air, avoided the compressor to produce the liquid and hit, improved the life of compressor.
Description
Technical Field
The utility model relates to an air conditioning technology field particularly, relates to a refrigerating system and air conditioner of multi-split air conditioner.
Background
With the development of air conditioning technology, multi-split air conditioners are also gradually and widely used.
The existing multi-split air conditioner mostly adopts a double-gas-liquid separator and a double-compressor system for ensuring the performance and the operational reliability of a unit, wherein the double-gas-liquid separator is in a parallel type, refrigerant return gas respectively enters the two gas-liquid separators to carry out gas-liquid separation and then respectively returns to a compressor, at the moment, the compressor return gas is only subjected to one-time separation, more liquid refrigerant still exists in the compressor return gas, the liquid impact of the compressor is easily caused, and the service life of the compressor is further influenced.
Therefore, the existing multi-split air conditioner needs to be further improved in structure and control method.
SUMMERY OF THE UTILITY MODEL
The utility model provides a problem be that compressor liquid hits appears easily in parallel vapour and liquid separator, influences the compressor life-span.
In order to solve the problem, the utility model provides a refrigerating system of multi-split air conditioner, including first vapour and liquid separator and second vapour and liquid separator, first vapour and liquid separator with the second vapour and liquid separator is established ties, first vapour and liquid separator's access connection is to the cross valve, first vapour and liquid separator's export with second vapour and liquid separator's access connection, second vapour and liquid separator's exit connection is to the compressor.
Many online air conditioner's refrigerating system, through setting up first vapour and liquid separator and second vapour and liquid separator and establish ties, the refrigerant can be through twice gas-liquid separation before getting into the compressor to greatly reduced the content of liquid refrigerant in the compressor return-air, can avoid the compressor to produce the liquid and hit, improved the life of compressor.
Optionally, a first connecting pipeline for passing a liquid component in the refrigerant is arranged between the first gas-liquid separator and the second gas-liquid separator.
Refrigerating system of many online air conditioners, through set up the first connecting tube who supplies the liquid component in the refrigerant to pass through between first vapour and liquid separator and second vapour and liquid separator, effectively guaranteed the oil return effect of the transmission of liquid component and compressor.
Optionally, a check valve is disposed on the first connection pipeline.
Refrigerating system who allies oneself with air conditioner more, through set up the check valve between first vapour and liquid separator and second vapour and liquid separator for during refrigerant and coolant oil can only get into second vapour and liquid separator from first vapour and liquid separator, effectively guaranteed return tolerance and time oil return volume in the compressor.
Optionally, the first gas-liquid separator and the second gas-liquid separator are both provided with oil return holes, a second connecting pipeline through which liquid components in the refrigerant pass is arranged between the second gas-liquid separator and the compressor, and the two oil return holes are respectively communicated with the first connecting pipeline and the second connecting pipeline.
Refrigerating system who allies oneself with air conditioner more, through all setting up the oil gallery on first vapour and liquid separator and second vapour and liquid separator, effectively guaranteed the oil return effect of compressor.
Optionally, the first gas-liquid separator is not provided with an oil return hole, the second gas-liquid separator comprises an oil return hole, a second connecting pipeline for liquid components in the refrigerant to pass through is arranged between the second gas-liquid separator and the compressor, and the oil return hole is communicated with the second connecting pipeline.
Refrigerating system who allies oneself with air conditioner more, through not establishing the oil gallery on first vapour and liquid separator, set up the oil gallery on second vapour and liquid separator, simplify first vapour and liquid separator and second vapour and liquid separator's pipe connection structure, do not show increase production design cost.
Optionally, the compressor includes a first compressor and a second compressor, and the liquid components in the refrigerant enter the first compressor and the second compressor respectively through the second connecting pipeline.
Refrigerating system of many online air conditioners, through the liquid component in the setting refrigerant get into first compressor and second compressor respectively through the second connecting tube, reduced the content of liquid refrigerant in the compressor return air, can avoid the compressor to produce the liquid and hit, improved the life of compressor.
Optionally, the first gas-liquid separator is connected with a four-way valve, and the four-way valve is connected with an indoor unit.
Refrigerating system of many online air conditioners, through setting up first vapour and liquid separator and cross valve connection, the cross valve is connected with the indoor set, when the air conditioner operation refrigeration or the mode of heating, the different operational mode is switched to the cross valve to realize the heating and the refrigeration function of indoor set.
Optionally, the four-way valve, the first gas-liquid separator, the second gas-liquid separator and the oil-gas separator are connected in sequence.
Refrigerating system of many online air conditioners, connect gradually through setting up cross valve, first vapour and liquid separator, second vapour and liquid separator and oil and gas separator, realize that the refrigerant switches over at the form of air conditioner refrigeration in with the heating mode.
Optionally, the four-way valve is connected with a heat exchanger, and the heat exchanger is connected with the indoor unit.
Refrigerating system who ally oneself with many online air conditioners, connect the heat exchanger through setting up the cross valve, the heat exchanger is connected with the indoor set, has constituted the heat transfer return circuit of air conditioner with other relation of connection cooperations.
The utility model also provides an air conditioner, including the aforesaid arbitrary many online air conditioner's refrigerating system. The advantages of the air conditioner and the refrigeration system are the same compared with the prior art, and the description is omitted.
Drawings
Fig. 1 is an overall schematic view of a multi-split air conditioner according to the present invention;
FIG. 2 is a schematic view of the return air flow in the gas-liquid separator and compressor of the present invention;
FIG. 3 is a schematic diagram of a multi-split air conditioner;
FIG. 4 is a schematic view of the return gas flow in a conventional parallel gas-liquid separator and compressor;
fig. 5 is a schematic diagram of a second gas-liquid separator according to the present invention.
Description of reference numerals:
1-a first gas-liquid separator, 2-a second gas-liquid separator, 3-a first compressor, 4-a second compressor, 5-a one-way valve, 6-a finned heat exchanger, 7-an oil-gas separator, 8-a four-way valve, 9-a high-pressure sensor, 10-PMV, 11-a first valve, 12-a second valve, 13-an oil return hole, 100-a first indoor unit, 200-a second indoor unit and 300-a third indoor unit.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1, the utility model provides a refrigerating system of multi-split air conditioner, including first vapour and liquid separator 1 and second vapour and liquid separator 2, first vapour and liquid separator 1 with second vapour and liquid separator 2 establishes ties, first vapour and liquid separator 1's access connection is to cross valve 8, first vapour and liquid separator 1's export with second vapour and liquid separator 2's access connection, second vapour and liquid separator 2's exit connection is to the compressor.
Specifically, combine fig. 1 and fig. 2 to show, many online air conditioners's device including the first vapour and liquid separator 1 and the second vapour and liquid separator 2 that the series connection set up, during the refrigerant gets into the compressor after one-level gas-liquid separation and second grade gas-liquid separation successively, combine fig. 3 and fig. 4 to show, compare in two vapour and liquid separators that adopt parallel connection to connect among the prior art, the content of liquid refrigerant in the compressor return-air has greatly been reduced to two gas-liquid separation devices of serial-type to can avoid the compressor to produce the liquid and hit, improve the life of compressor.
Many online air conditioner's refrigerating system, through setting up first vapour and liquid separator and second vapour and liquid separator and establish ties, the refrigerant can be through twice gas-liquid separation before getting into the compressor to greatly reduced the content of liquid refrigerant in the compressor return-air, can avoid the compressor to produce the liquid and hit, improved the life of compressor.
Optionally, a first connecting pipeline for passing a liquid component in the refrigerant is arranged between the first gas-liquid separator 1 and the second gas-liquid separator 2.
Specifically, as shown in fig. 1 and fig. 2, a first connecting pipeline through which a liquid component in the refrigerant passes is provided between the first gas-liquid separator 1 and the second gas-liquid separator 2, and the liquid component in the first gas-liquid separator 1 enters the second gas-liquid separator 2 through the first connecting pipeline, so that transfer of the liquid component is effectively ensured, and meanwhile, the cooling oil also enters the second gas-liquid separator 2 along with the liquid refrigerant, thereby ensuring an oil return effect of the compressor.
Refrigerating system of many online air conditioners, through set up the first connecting tube who supplies the liquid component in the refrigerant to pass through between first vapour and liquid separator and second vapour and liquid separator, effectively guaranteed the oil return effect of the transmission of liquid component and compressor.
Optionally, a check valve 5 is arranged on the first connection pipeline.
Specifically, as shown in fig. 1 and fig. 2, a check valve 5 is disposed on the first connection pipeline, the check valve 5 controls the liquid component to enter the second gas-liquid separator 2 from the first gas-liquid separator 1, and the liquid component, a small amount of gas component, cooling oil and the like in the second gas-liquid separator 2 cannot enter the first gas-liquid separator 1, so that the gas return amount and the oil return amount in the compressor can be effectively ensured.
Refrigerating system who allies oneself with air conditioner more, through set up the check valve between first vapour and liquid separator and second vapour and liquid separator for during refrigerant and coolant oil can only get into second vapour and liquid separator from first vapour and liquid separator, effectively guaranteed return tolerance and time oil return volume in the compressor.
Optionally, both the first gas-liquid separator 1 and the second gas-liquid separator 2 are provided with oil return holes 13, a second connecting pipeline through which a liquid component in the refrigerant passes is arranged between the second gas-liquid separator 2 and the compressor, and the two oil return holes 13 are respectively communicated with the first connecting pipeline and the second connecting pipeline.
Specifically, as shown in fig. 1, fig. 2 and fig. 5, oil return holes 13 are formed in both the first gas-liquid separator 1 and the second gas-liquid separator 2, and the cooling oil passes through the oil return holes 13 in the first gas-liquid separator 1, enters the second gas-liquid separator 2 from the first connecting pipeline between the first gas-liquid separator 1 and the second gas-liquid separator 2, and finally enters the compressor from the oil return holes 13 in the second gas-liquid separator 2, so that the oil return effect of the compressor is effectively ensured.
Refrigerating system who allies oneself with air conditioner more, through all setting up the oil gallery on first vapour and liquid separator and second vapour and liquid separator, effectively guaranteed the oil return effect of compressor.
Optionally, the first gas-liquid separator 1 is not provided with an oil return hole 13, the second gas-liquid separator 2 includes the oil return hole 13, a second connecting pipeline through which a liquid component in the refrigerant passes is provided between the second gas-liquid separator 2 and the compressor, and the oil return hole 13 is communicated with the second connecting pipeline.
Specifically, as shown in fig. 1, fig. 2 and fig. 5, since the first gas-liquid separator 1 mainly performs a gas-liquid separation function, and the gas return pipeline is increased due to the series structure, which may result in a reduction in oil return efficiency of the first gas-liquid separator 1, the first gas-liquid separator 1 omits the oil return hole 13, retains the oil return hole 13 on the second gas-liquid separator 2, simplifies the pipeline connection structure of the first gas-liquid separator 1 and the second gas-liquid separator 2, and does not significantly increase the production and design costs.
Refrigerating system who allies oneself with air conditioner more, through not establishing the oil gallery on first vapour and liquid separator, set up the oil gallery on second vapour and liquid separator, simplify first vapour and liquid separator and second vapour and liquid separator's pipe connection structure, do not show increase production design cost.
Optionally, the compressor includes a first compressor 3 and a second compressor 4, and the liquid components in the refrigerant enter the first compressor 3 and the second compressor 4 through the second connecting line, respectively.
Specifically, as shown in fig. 1 and fig. 2, the compressor includes a first compressor 3 and a second compressor 4, the liquid component in the refrigerant enters the first compressor 3 and the second compressor 4 through a second connecting pipeline arranged between the second gas-liquid separator 2 and the compressor, and the liquid component and the gaseous component separately enter the first compressor 3 and the second compressor 4, so that the content of the liquid refrigerant in the return gas of the compressor is reduced, liquid slugging of the compressor can be avoided, and the service life of the compressor is prolonged.
Refrigerating system of many online air conditioners, through the liquid component in the setting refrigerant get into first compressor and second compressor respectively through the second connecting tube, reduced the content of liquid refrigerant in the compressor return air, can avoid the compressor to produce the liquid and hit, improved the life of compressor.
Optionally, the first gas-liquid separator 1 is connected to a four-way valve 8, and the four-way valve 8 is connected to an indoor unit.
Specifically, as shown in fig. 1 and 2, the first gas-liquid separator 1 is connected to a four-way valve 8, the four-way valve 8 is connected to an indoor unit, and when the air conditioner operates in a cooling or heating mode, the four-way valve 8 switches different operation modes, so that the heating and cooling functions of the indoor unit are realized.
Refrigerating system of many online air conditioners, through setting up first vapour and liquid separator and cross valve connection, the cross valve is connected with the indoor set, when the air conditioner operation refrigeration or the mode of heating, the different operational mode is switched to the cross valve to realize the heating and the refrigeration function of indoor set.
Optionally, the four-way valve 8, the first gas-liquid separator 1, the second gas-liquid separator 2 and the oil-gas separator 7 are connected in sequence.
Specifically, as shown in fig. 1 and fig. 2, the four-way valve 8, the first gas-liquid separator 1, the second gas-liquid separator 2 and the oil-gas separator 7 are connected in sequence, wherein the oil-gas separator 7 separates a mixture of a refrigerant and cooling oil from the compressor, the separated refrigerant enters a condenser, and the cooling oil is collected at the bottom of the oil-gas separator 7 and then returns to the compressor again; the four-way valve 8, the first gas-liquid separator 1, the second gas-liquid separator 2 and the oil-gas separator 7 are sequentially connected, so that the form switching of the refrigerant in the air-conditioning refrigeration and heating modes is realized. Wherein, a high-pressure sensor 9 is arranged between the four-way valve 8 and the oil-gas separator 7.
Refrigerating system of many online air conditioners, connect gradually through setting up cross valve, first vapour and liquid separator, second vapour and liquid separator and oil and gas separator, realize that the refrigerant switches over at the form of air conditioner refrigeration in with the heating mode.
Optionally, the four-way valve 8 is connected to a heat exchanger 6, and the heat exchanger 6 is connected to the indoor unit.
Specifically, as shown in fig. 1, the four-way valve 8 is connected to the heat exchanger 6, and the heat exchanger 6 is connected to the indoor unit, so that each device shown in fig. 1 constitutes a heat transfer circuit of the air conditioner. The heat exchanger 6 can adopt the heat exchanger types including a fin heat exchanger; a first valve 11 is arranged between the four-way valve 8 and the indoor unit; a PMV10 and a second valve 12 are arranged between the heat exchanger 6 and the indoor unit; the indoor set is including the first indoor set 100, the second indoor set 200 and the third indoor set 300 that ally oneself with the setting, the utility model discloses the quantity of well indoor set is not limited to the three that this embodiment lists to the actual need is the standard.
Refrigerating system who ally oneself with many online air conditioners, connect the heat exchanger through setting up the cross valve, the heat exchanger is connected with the indoor set, has constituted the heat transfer return circuit of air conditioner with other relation of connection cooperations.
The utility model also provides a control method of multi-split air conditioner, include: controlling the refrigerant to enter a first gas-liquid separator 1 for primary gas-liquid separation; after the primary gas-liquid separation, controlling the refrigerant to enter a second gas-liquid separator 2 for secondary gas-liquid separation; after the secondary gas-liquid separation, controlling the refrigerant to enter a compressor; wherein the first gas-liquid separator 1 and the second gas-liquid separator 2 are connected in series.
Specifically, as shown in fig. 1 and 2, the refrigerant is first controlled to enter the first gas-liquid separator 1, gas-liquid separation is performed in the first gas-liquid separator 1, the refrigerant is separated into a gas-liquid mixed component and a liquid component, the gas-liquid mixed component moves to the top of the first gas-liquid separator 1 due to different densities, the liquid component moves to the bottom of the first gas-liquid separator 1, the refrigerant is then controlled to enter the second gas-liquid separator 2 for secondary gas-liquid separation, the secondary gas-liquid separation mainly separates the gas-liquid mixed component after the primary gas-liquid separation, and the refrigerant is controlled to enter the compressor after two times of gas-liquid separation. Because the refrigerant enters the compressor after twice gas-liquid separation, the content of the liquid refrigerant in the return gas of the compressor is greatly reduced, thereby avoiding the liquid impact of the compressor and prolonging the service life of the compressor. Wherein, combine to show in fig. 3 and fig. 4, current parallel vapour and liquid separator adopts two vapour and liquid separators of parallelly connected, and the return gas gets into two vapour and liquid separators respectively, carries out the gas-liquid separation back, re-enters into the compressor, makes like this still have more liquid refrigerant content in the return gas of compressor, causes the compressor liquid to hit easily, and then reduces the life of compressor, therefore the utility model provides a serial-type two vapour and liquid separator devices to prior art's problem has effectively been solved.
The control method of many online air conditioners, through setting up first vapour and liquid separator and the series connection of second vapour and liquid separator, the refrigerant can be through twice gas-liquid separation before getting into the compressor to greatly reduced the content of liquid refrigerant in the compressor return-air, can avoid the compressor to produce the liquid and hit, improved the life of compressor.
Optionally, the control method further includes: the refrigerant is divided into a gas-liquid mixed component and a liquid component after passing through the first gas-liquid separator 1, the gas-liquid mixed component is controlled to enter the second gas-liquid separator 2 from the top of the first gas-liquid separator 1, and the liquid component is controlled to enter the second gas-liquid separator 2 from the bottom of the first gas-liquid separator 1.
Specifically, after the refrigerant is subjected to primary gas-liquid separation in the first gas-liquid separator 1, the refrigerant is divided into a gas-liquid mixed component and a liquid component, and due to the fact that the density of the gas-liquid mixed component is different from that of the liquid component, the gas-liquid mixed component rises and enters the second gas-liquid separator 2 from the top of the first gas-liquid separator 1, and the liquid component falls and enters the second gas-liquid separator 2 from the bottom of the first gas-liquid separator 1, so that the primary gas-liquid separation process of the refrigerant is achieved.
The control method of many online air conditioners, through the gas-liquid mixture component in the control refrigerant and liquid component get into the second vapour and liquid separator from the top and the bottom of first vapour and liquid separator respectively, realize the one-level gas-liquid separation process of refrigerant.
Optionally, the control method further includes: controlling the liquid component to enter the second gas-liquid separator 2 from the connecting line between the first gas-liquid separator 1 and the second gas-liquid separator 2; the connecting pipeline is provided with a one-way valve 5, and the one-way valve 5 controls the liquid components to enter the second gas-liquid separator 2 from the first gas-liquid separator 1 in a one-way mode.
Specifically, as shown in fig. 1 and fig. 2, the liquid component enters the second gas-liquid separator 2 through a connecting pipeline between the first gas-liquid separator 1 and the second gas-liquid separator 2, the connecting pipeline refers to a pipeline through which the liquid component passes, which is connected to the second gas-liquid separator 2 at the bottom of the first gas-liquid separator 1, and is also referred to as a first connecting pipeline hereinafter, a check valve 5 is arranged on the connecting pipeline, the check valve 5 controls the liquid component to enter the second gas-liquid separator 2 from the first gas-liquid separator 1, and the liquid component in the second gas-liquid separator 2, a small amount of the gas component and cooling oil, and the like cannot enter the first gas-liquid separator 1, so that the air return amount and the oil return amount in the compressor can be effectively ensured.
The control method of the multi-split air conditioner can only enter the second gas-liquid separator from the first gas-liquid separator through the check valve to control the refrigerant and the cooling oil, and effectively ensures the air return amount and the oil return amount in the compressor.
The utility model also provides an air conditioner, including the aforesaid arbitrary many online air conditioner's refrigerating system. The advantages of the air conditioner and the refrigeration system are the same compared with the prior art, and the description is omitted.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention, and the scope of the present invention is defined by the appended claims.
Claims (10)
1. The refrigeration system of the multi-split air conditioner is characterized by comprising a first gas-liquid separator (1) and a second gas-liquid separator (2), wherein the first gas-liquid separator (1) and the second gas-liquid separator (2) are connected in series, an inlet of the first gas-liquid separator (1) is connected to a four-way valve (8), an outlet of the first gas-liquid separator (1) is connected with an inlet of the second gas-liquid separator (2), and an outlet of the second gas-liquid separator (2) is connected to a compressor.
2. A refrigeration system according to claim 1, characterized in that a first connecting line for passing a liquid component in the refrigerant is provided between the first gas-liquid separator (1) and the second gas-liquid separator (2).
3. A refrigerating system as claimed in claim 2, characterized in that a non-return valve (5) is arranged on the first connection line.
4. A refrigerating system according to claim 2, characterized in that both the first gas-liquid separator (1) and the second gas-liquid separator (2) are provided with oil return holes (13), a second connecting line for passing liquid components in the refrigerant is provided between the second gas-liquid separator (2) and the compressor, and both oil return holes (13) are respectively communicated with the first connecting line and the second connecting line.
5. A refrigerating system according to claim 1, characterized in that the first gas-liquid separator (1) is not provided with an oil return hole (13), the second gas-liquid separator (2) comprises an oil return hole (13), a second connecting pipeline for passing the liquid component in the refrigerant is arranged between the second gas-liquid separator (2) and the compressor, and the oil return hole (13) is communicated with the second connecting pipeline.
6. A refrigeration system according to claim 4 or 5, characterized in that the compressors comprise a first compressor (3) and a second compressor (4), and the liquid components in the refrigerant are led into the first compressor (3) and the second compressor (4) respectively through the second connecting line.
7. The refrigeration system according to claim 1, characterized in that the first gas-liquid separator (1) is connected to a four-way valve (8), the four-way valve (8) being connected to an indoor unit.
8. The refrigeration system according to claim 7, wherein the four-way valve (8), the first gas-liquid separator (1), the second gas-liquid separator (2) and the oil-gas separator (7) are connected in sequence.
9. The refrigeration system as recited in claim 7, characterized in that the four-way valve (8) is connected with a heat exchanger (6), and the heat exchanger (6) is connected with the indoor unit.
10. An air conditioner characterized by comprising a refrigerating system of a multi-split air conditioner as set forth in any one of claims 1 to 9.
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| CN201921202958.3U CN210320728U (en) | 2019-07-29 | 2019-07-29 | Refrigerating system of multi-split air conditioner and air conditioner |
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| CN201921202958.3U CN210320728U (en) | 2019-07-29 | 2019-07-29 | Refrigerating system of multi-split air conditioner and air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319619A (en) * | 2019-07-29 | 2019-10-11 | 宁波奥克斯电气股份有限公司 | A kind of control method of multi-gang air-conditioner, refrigeration system and air conditioner |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319619A (en) * | 2019-07-29 | 2019-10-11 | 宁波奥克斯电气股份有限公司 | A kind of control method of multi-gang air-conditioner, refrigeration system and air conditioner |
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