CN215523680U - Three-pipe multi-outdoor-unit parallel defrosting system - Google Patents
Three-pipe multi-outdoor-unit parallel defrosting system Download PDFInfo
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- CN215523680U CN215523680U CN202120807474.2U CN202120807474U CN215523680U CN 215523680 U CN215523680 U CN 215523680U CN 202120807474 U CN202120807474 U CN 202120807474U CN 215523680 U CN215523680 U CN 215523680U
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Abstract
The utility model discloses a three-pipe multi-outdoor-unit parallel defrosting system which comprises an indoor heat exchanger and at least two outdoor units arranged in parallel, wherein each outdoor unit comprises a compressor, a four-way valve, an outdoor heat exchanger and a main electromagnetic valve, the main electromagnetic valves of the outdoor units are connected to one end of the indoor heat exchanger in a converging manner, the outdoor heat exchangers of the outdoor units are connected to the other end of the indoor heat exchanger in a converging manner, each outdoor unit also comprises a defrosting main circuit and a bypass auxiliary circuit, the defrosting main circuit is provided with a first electromagnetic valve and a second electromagnetic valve which are sequentially arranged, one end of the defrosting main circuit is connected to a pipeline between the four-way valve and the outdoor heat exchanger in a bypassing manner, and the other ends of the defrosting main circuits of the outdoor units are connected together in a converging manner; and a third electromagnetic valve is arranged on the bypass auxiliary path, and the two ends of the bypass auxiliary path are respectively connected with a pipeline between the first electromagnetic valve and the second electromagnetic valve and a pipeline between the four-way valve and the main electromagnetic valve in a bypass mode.
Description
Technical Field
The utility model relates to the technical field of multi-split air conditioning systems, in particular to a three-pipe multi-outdoor-unit parallel defrosting system.
Background
The existing air conditioning systems mostly adopt a defrosting method of reversing by a four-way valve to defrost, the existing air conditioning systems comprise parallel modular machines, and the defrosting method generally adopts the mode that all the modular machines are reversed to defrost together, so that the indoor machine stops heating, and the comfort level is not enough. Or a small part of the defrosting method is realized by using a phase change material heat storage mode and the like, but the cost is higher.
The problems of the air conditioning system include:
1. when the air conditioner frosts, the comfort level is poor due to the adoption of the method of reversing the four-way valve to defrost.
2. When the air conditioner frosts, the modes of phase change material heat storage and the like are utilized to defrost without reversing, and the cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a three-pipe multi-outdoor-unit parallel defrosting system.
The utility model realizes the aim, and provides a three-pipe multi-outdoor-unit parallel defrosting system which comprises an indoor heat exchanger and at least two outdoor units arranged in parallel, wherein each outdoor unit comprises a compressor, a four-way valve, an outdoor heat exchanger and a main electromagnetic valve, four interfaces of the four-way valve are respectively connected with an exhaust end of the compressor, a gas return end of the compressor, the main electromagnetic valve and the outdoor heat exchanger, the main electromagnetic valves of the outdoor units are connected with one end of the indoor heat exchanger in a gathering way, the outdoor heat exchangers of the outdoor units are connected with the other end of the indoor heat exchanger in a gathering way, each outdoor unit also comprises a defrosting main circuit and a bypass auxiliary circuit, wherein the defrosting main circuit is provided with a first electromagnetic valve and a second electromagnetic valve which are sequentially arranged, one end of the defrosting main circuit is connected with a pipeline between the four-way valve and the outdoor heat exchanger in a bypassing way, the other ends of the defrosting main paths of the outdoor units are connected together in a gathering way; and a third electromagnetic valve is arranged on the bypass auxiliary path, and the two ends of the bypass auxiliary path are respectively connected with a pipeline between the first electromagnetic valve and the second electromagnetic valve and a pipeline between the four-way valve and the main electromagnetic valve in a bypass mode.
Furthermore, each outdoor unit also comprises an oil separator arranged between the exhaust end of the compressor and the four-way valve.
Furthermore, each outdoor unit also comprises a gas-liquid separator arranged between the gas return end of the compressor and the four-way valve.
Furthermore, each outdoor unit also comprises a throttling device arranged between the outdoor heat exchanger and the indoor heat exchanger.
Further, the system comprises three outdoor units which are arranged in parallel.
Further, the throttling device is an electronic expansion valve.
Furthermore, one end of the defrosting main path, which is close to the first electromagnetic valve, is connected with a pipeline between the four-way valve and the outdoor heat exchanger in a bypass mode; and the other ends of the defrosting main circuit, which are adjacent to the second electromagnetic valve, are converged and connected together.
The utility model adopts the scheme, and has the beneficial effects that: the on-off of the defrosting main path and the bypass auxiliary path are controlled by the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve, so that the refrigerant evaporated by the non-frosted outdoor unit enters the compressor of the frosted outdoor unit to be compressed and then flows to the frosted outdoor heat exchanger to be defrosted, the heating effect and the defrosting effect of a user are effectively guaranteed, and the influence on indoor heating is smaller.
Drawings
FIG. 1 is a side view of a defrost system.
The system comprises an indoor heat exchanger 1, an outdoor unit 2, a compressor 21, a four-way valve 22, an outdoor heat exchanger 23, a main electromagnetic valve 24, a first electromagnetic valve 25, a second electromagnetic valve 26, a third electromagnetic valve 27, an oil separator 28, a gas-liquid separator 29 and a throttling device 30.
Detailed Description
To facilitate an understanding of the utility model, the utility model is described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete.
Referring to fig. 1, in the present embodiment, a three-pipe multi-outdoor-unit parallel defrosting system includes an indoor heat exchanger 1 and at least two outdoor units 2 arranged in parallel, each outdoor unit 2 includes a compressor 21, a four-way valve 22, an outdoor heat exchanger 23, a main electromagnetic valve 24, a defrosting main circuit and a bypass auxiliary circuit, four interfaces of the four-way valve 22 are respectively connected to a discharge end of the compressor 21, a return end of the compressor 21, the main electromagnetic valve 24 and the outdoor heat exchanger 23, the main electromagnetic valve 24 of each outdoor unit 2 is connected to one end of the indoor heat exchanger 1 in a converged manner, and the outdoor heat exchanger 23 of each outdoor unit 2 is connected to the other end of the indoor heat exchanger 1 in a converged manner.
Further, each of the outdoor units 2 further includes an oil separator 28 disposed between a discharge end of the compressor 21 and the four-way valve 22.
Further, each of the outdoor units 2 further includes a gas-liquid separator 29 provided between the gas return end of the compressor 21 and the four-way valve 22.
Further, each outdoor unit 2 further includes a throttle device 30 disposed between the outdoor heat exchanger 23 and the indoor heat exchanger 1, and the throttle device 30 is an electronic expansion valve.
Further, three outdoor units 2 are included and arranged in parallel.
Further, a first electromagnetic valve 25 and a second electromagnetic valve 26 which are sequentially arranged are arranged on the defrosting main path, one end of the defrosting main path is connected with a pipeline between the four-way valve 22 and the outdoor heat exchanger 23 in a bypassing manner, and the other ends of the defrosting main paths of the outdoor units 2 are connected together in a gathering manner; the bypass auxiliary path is provided with a third electromagnetic valve 27, and two ends of the bypass auxiliary path are respectively connected with a pipeline between the first electromagnetic valve 25 and the second electromagnetic valve 26 and a pipeline between the four-way valve 22 and the main electromagnetic valve 24 in a bypass mode. Accordingly, when each outdoor unit 2 is in the normal operation heating mode, the first solenoid valve 25 and the second solenoid valve 26 on each defrosting main path and the third solenoid valve 27 on the bypass sub path are both in the closed state.
Further, when any outdoor unit 2 is in the normal operation heating mode, the main electromagnetic valve 24 and the electronic expansion valve of the outdoor unit 2 are opened, the high-temperature and high-pressure refrigerant discharged from the compressor 21 at this time flows into the indoor heat exchanger 1 through the four-way valve 22 and the main electromagnetic valve 24 to be condensed and release heat, the refrigerant after heat release enters the outdoor heat exchanger 23 through the electronic expansion valve to be evaporated and absorb heat, and the refrigerant after heat absorption flows back to the compressor 21 through the four-way valve 22 to complete the heating cycle. In the outdoor unit 2 in an idle or standby state, the main electromagnetic valve 24 and the electronic expansion valve of the outdoor unit 2 are closed, and the refrigerant is prevented from flowing through the outdoor unit 2.
For convenience of explanation, the outdoor unit 2 in which the frost formation is abnormal is defined as the frosted outdoor unit 2, and the other outdoor units 2 of the outdoor units 2 which are not abnormal are defined herein.
In the present embodiment, when any outdoor unit 2 detects that the outdoor heat exchanger 23 thereof is frosted during operation, the four-way valve 22 of the outdoor unit 2 is switched to power-off, the main electromagnetic valve 24 is closed, the second electromagnetic valve 26 and the third electromagnetic valve 27 are opened, and the first electromagnetic valve 25 is closed; and the main solenoid valves 24, the first solenoid valves 25 and the second solenoid valves 26 of the remaining outdoor units 2 are opened and the third solenoid valves 27 are closed. At this time, the high-temperature and high-pressure refrigerant discharged from the compressor 21 of the frosting outdoor unit 2 flows to the outdoor heat exchanger 23 through the four-way valve 22 to perform heat release and defrosting, the refrigerant after heat release is mixed with the refrigerant from the indoor heat exchanger 1 and flows to the other indoor units, wherein, the mixed refrigerant flows into the outdoor heat exchanger 23 through the electronic expansion valves of the other indoor units to evaporate and absorb heat, the refrigerant after absorbing heat is divided into two paths, the first path flows back to the compressor 21 of the indoor unit through the four-way valve 22, the second path flows into the defrosting main path of the defrosting outdoor unit 2 through the first electromagnetic valve 25 and the second electromagnetic valve 26 of the defrosting main path, and the part of the refrigerant flows back to the compressor 21 after passing through the second solenoid valve 26, the third solenoid valve 27 and the four-way valve 22 once in the frosting outdoor unit 2, by circulating in this way, the heating effect of the indoor heat exchanger 1 is ensured, and the defrosting operation is performed on the outdoor heat exchanger 23 of the defrosting outdoor unit 2.
Further, after defrosting of the defrosting outdoor unit 2 is completed, the first electromagnetic valve 25 and the third electromagnetic valve 27 of the defrosting outdoor unit 2 are closed, the main electromagnetic valve 24 is opened, and the four-way valve 22 is electrically switched; the first and second solenoid valves 25 and 26 of the remaining outdoor units 2 are closed, thereby restoring the system to a normal parallel heating operation.
The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to limit the present invention in any way. Those skilled in the art can make many changes, modifications, and equivalents to the embodiments of the utility model without departing from the scope of the utility model as set forth in the claims below. Therefore, equivalent changes made according to the spirit of the present invention should be covered within the protection scope of the present invention without departing from the contents of the technical scheme of the present invention.
Claims (7)
1. The utility model provides a three tub of multi-outdoor machine parallel defrosting system, includes indoor heat exchanger (1) and two at least outdoor machine (2) of arranging in parallel, and every outdoor machine (2) includes compressor (21), four way valve (22), outdoor heat exchanger (23) and main solenoid valve (24), wherein, four interfaces of four way valve (22) are connected with the exhaust end of compressor (21), the return-air end of compressor (21), main solenoid valve (24) and outdoor heat exchanger (23) respectively, each main solenoid valve (24) of outdoor machine (2) homogeneous convergence connect in the one end of indoor heat exchanger (1) to outdoor heat exchanger (23) homogeneous convergence of each outdoor machine (2) connects in the other end of indoor heat exchanger (1), its characterized in that: each outdoor unit (2) further comprises a defrosting main path and a bypass auxiliary path, wherein the defrosting main path is provided with a first electromagnetic valve (25) and a second electromagnetic valve (26) which are sequentially arranged, one end of the defrosting main path is connected with a pipeline between the four-way valve (22) and the outdoor heat exchanger (23) in a bypass mode, and the other ends of the defrosting main paths of the outdoor units (2) are connected together in a gathering mode; and a third electromagnetic valve (27) is arranged on the bypass auxiliary path, and the two ends of the bypass auxiliary path are respectively connected with a pipeline between the first electromagnetic valve (25) and the second electromagnetic valve (26) and a pipeline between the four-way valve (22) and the main electromagnetic valve (24) in a bypass mode.
2. The parallel defrosting system of the three-pipe multi-outdoor unit according to claim 1, characterized in that: each outdoor unit (2) further comprises an oil separator (28) arranged between the exhaust end of the compressor (21) and the four-way valve (22).
3. The parallel defrosting system of the three-pipe multi-outdoor unit according to claim 1, characterized in that: each outdoor unit (2) further comprises a gas-liquid separator (29) arranged between the gas return end of the compressor (21) and the four-way valve (22).
4. The parallel defrosting system of the three-pipe multi-outdoor unit according to claim 1, characterized in that: each outdoor unit (2) further comprises a throttling device (30) arranged between the outdoor heat exchanger (23) and the indoor heat exchanger (1).
5. The parallel defrosting system of the three-pipe multi-outdoor unit according to claim 1, characterized in that: comprises three outdoor units (2) which are arranged in parallel.
6. The three-pipe multi-outdoor-unit parallel defrosting system according to claim 4, characterized in that: the throttling device (30) is an electronic expansion valve.
7. The parallel defrosting system of the three-pipe multi-outdoor unit according to claim 1, characterized in that: one end of the defrosting main path, which is close to the first electromagnetic valve (25), is connected with a pipeline between the four-way valve (22) and the outdoor heat exchanger (23) in a bypassing manner; the other ends of the defrosting main paths adjacent to the second electromagnetic valve (26) are converged and connected together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120807474.2U CN215523680U (en) | 2021-04-20 | 2021-04-20 | Three-pipe multi-outdoor-unit parallel defrosting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120807474.2U CN215523680U (en) | 2021-04-20 | 2021-04-20 | Three-pipe multi-outdoor-unit parallel defrosting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215523680U true CN215523680U (en) | 2022-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120807474.2U Active CN215523680U (en) | 2021-04-20 | 2021-04-20 | Three-pipe multi-outdoor-unit parallel defrosting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215523680U (en) |
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2021
- 2021-04-20 CN CN202120807474.2U patent/CN215523680U/en active Active
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