CN220567392U - Heat recovery multi-split air conditioning system - Google Patents
Heat recovery multi-split air conditioning system Download PDFInfo
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- CN220567392U CN220567392U CN202321633507.1U CN202321633507U CN220567392U CN 220567392 U CN220567392 U CN 220567392U CN 202321633507 U CN202321633507 U CN 202321633507U CN 220567392 U CN220567392 U CN 220567392U
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- 238000011084 recovery Methods 0.000 title claims abstract description 34
- 238000004378 air conditioning Methods 0.000 title claims abstract description 29
- 239000003507 refrigerant Substances 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 12
- 238000005057 refrigeration Methods 0.000 claims description 5
- 230000000712 assembly Effects 0.000 abstract description 2
- 238000000429 assembly Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Abstract
The utility model discloses a heat recovery multi-split air conditioning system, which comprises: the outdoor unit, at least two indoor units and mode converters are arranged in one-to-one correspondence with the indoor units; the mode converter includes at least: the first mode converter and the second mode converter comprise control valve assemblies for controlling the flow direction of the refrigerant; when the indoor units corresponding to the first mode converter and the second mode converter switch the operation modes at the same time, the first mode converter and the second mode converter close the opened control valve assembly at the same time, and control valves corresponding to the operation modes to be switched in the first mode converter and the second mode converter are opened gradually at the same time. The utility model solves the problem that the heat recovery multi-split air conditioner system cannot be compatible with two mode converters in the prior art, improves the running stability of the heat recovery multi-split air conditioner system, and reduces the running noise.
Description
Technical Field
The utility model relates to the technical field of heat recovery multi-split air conditioners, in particular to a heat recovery multi-split air conditioning system.
Background
The heat recovery multi-split air conditioner system consists of an outdoor unit, an indoor unit and a mode converter, wherein the mode converter is an important component for connecting the outdoor unit and the indoor unit and controlling the running mode of the indoor unit.
In the existing heat recovery multi-split system, the common mode converter comprises two schemes: the flow direction of the refrigerant is controlled by an electromagnetic valve or by an electronic expansion valve. The control modes of the two mode converters are different, the outdoor unit in the existing multi-connected system can only be compatible with one mode converter, and if the outdoor unit is matched with an error mode converter or is matched with the two mode converters at the same time, the control is wrong, so that the operation effect is poor or abnormal operation noise occurs.
Aiming at the problem that the heat recovery multi-split machine in the related art cannot be compatible with two mode converters, no effective solution is proposed at present.
Disclosure of Invention
The utility model provides a heat recovery multi-split air conditioning system, which at least solves the problem that a heat recovery multi-split air conditioning system in the prior art cannot be compatible with two mode converters.
To solve the above technical problem, according to an aspect of an embodiment of the present utility model, there is provided a heat recovery multi-split air conditioning system, including:
the outdoor unit, at least two indoor units and mode converters are arranged in one-to-one correspondence with the indoor units; the mode converter includes at least: the first mode converter and the second mode converter comprise control valve assemblies for controlling the flow direction of the refrigerant;
the control valve assembly of the first mode converter includes: the high-pressure electromagnetic valve, the high-pressure balance valve which is arranged in parallel with the high-pressure electromagnetic valve, and the low-pressure balance valve which is arranged in parallel with the high-pressure electromagnetic valve;
the control valve assembly of the second mode converter includes: a high-pressure electronic expansion valve and a low-pressure electronic expansion valve;
when the indoor units corresponding to the first mode converter and the second mode converter switch the operation modes at the same time, the first mode converter and the second mode converter close the opened control valve assembly at the same time, and control valves corresponding to the operation modes to be switched in the first mode converter and the second mode converter are opened gradually at the same time.
Based on the further improvement of the scheme, when the indoor units corresponding to the first mode converter and the second mode converter are simultaneously switched from the refrigerating mode to the heating mode, the low-pressure electromagnetic valve and the low-pressure balance valve of the first mode converter are closed, and the low-pressure electromagnetic valve of the second mode converter is closed; after a first preset time, the high-pressure balance valve of the first mode converter is opened, and the high-pressure electronic expansion valve of the second mode converter is opened for a preset step number; after a second preset time, the high-pressure electromagnetic valve of the first mode converter is opened, and the high-pressure electronic expansion valve of the second mode converter is completely opened;
when the indoor units corresponding to the first mode converter and the second mode converter are simultaneously switched from a heating mode to a refrigerating mode, the high-pressure electromagnetic valve and the high-pressure balance valve of the first mode converter are closed, and the high-pressure electronic expansion valve of the second mode converter is closed; after a third preset time, the low-pressure balance valve of the first mode converter is opened, and the low-voltage electronic expansion valve of the second mode converter is opened for a preset step number; after a fourth preset time, the low-voltage electromagnetic valve of the first mode converter is opened, and the low-voltage electromagnetic expansion valve of the second mode converter is fully opened.
Based on the further improvement of the scheme, when the indoor units corresponding to the first mode converter and the second mode converter are not switched to the operation mode at the same time, and the indoor units corresponding to the first mode converter or the second mode converter are switched to the heating mode from the cooling mode, the low-pressure electromagnetic valve and the low-pressure balance valve are closed, the high-pressure balance valve is opened after a fifth preset time, the high-pressure electromagnetic valve is opened after a sixth preset time, or the low-pressure electromagnetic valve is closed, the high-pressure electronic expansion valve is opened for a certain step number after a seventh preset time, and the high-pressure electronic expansion valve is completely opened after an eighth time;
when the indoor units corresponding to the first mode converter and the second mode converter are not switched to the operation mode at the same time, and the indoor units corresponding to the first mode converter or the second mode converter are switched to the refrigeration mode from the heating mode, the high-pressure electromagnetic valve and the high-pressure balance valve are closed, the low-pressure balance valve is opened after a ninth preset time, the low-pressure electromagnetic valve is opened after a tenth preset time, or the high-pressure electromagnetic expansion valve is closed, the low-pressure electromagnetic expansion valve is opened for a certain step number after an eleventh preset time, and the low-pressure electromagnetic expansion valve is completely opened after the twelfth time;
the first preset time is the maximum of the fifth preset time and the seventh preset time, the second preset time is the maximum of the sixth preset time and the eighth preset time, the third preset time is the maximum of the ninth preset time and the eleventh preset time, and the fourth preset time is the maximum of the tenth preset time and the twelfth preset time.
Based on a further improvement of the above, the first mode converter and the second mode converter each comprise a piping assembly comprising: the high-pressure air pipe section, the low-pressure air pipe section and the inner machine air pipe section, wherein one end of the high-pressure air pipe section is connected with an outdoor high-pressure air pipe, the other end of the high-pressure air pipe section is connected with the inner machine air pipe section, one end of the low-pressure air pipe section is connected with an outdoor low-pressure air pipe, the other end of the low-pressure air pipe section is connected with the inner machine air pipe section, and the inner machine air pipe section is also connected with an indoor air pipe;
the high-pressure electromagnetic valve is arranged on a high-pressure air pipe section of the first mode converter; the high-pressure balance valve and the high-pressure electromagnetic valve are arranged in parallel, and the circulation diameter of the high-pressure balance valve is smaller than that of the high-pressure electromagnetic valve; the low-pressure electromagnetic valve is arranged on a low-pressure gas pipe section of the first mode converter; the low-pressure balance valve is arranged in parallel with the low-pressure electromagnetic valve, and the circulation diameter of the low-pressure balance valve is smaller than that of the low-pressure electromagnetic valve;
the high-pressure electronic expansion valve is arranged on the high-pressure air pipe section of the second mode converter; the low-voltage electronic expansion valve is arranged at the low-pressure gas pipe section of the second mode converter.
The utility model provides a heat recovery multi-split air conditioning system compatible with two mode converters, and for the heat recovery multi-split air conditioning system, a control scheme compatible with the two mode converters is automatically adopted, particularly when an indoor unit switches an operation mode at the same time, a first mode converter and a second mode converter close an opened control valve assembly at the same time, and control valves corresponding to the operation mode to be switched in the first mode converter and the second mode converter are opened gradually at the same time.
Drawings
FIG. 1 is a schematic diagram of an alternative configuration of a heat recovery multi-split air conditioning system according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of an alternative configuration of a heat recovery multi-split air conditioning system according to an embodiment of the present utility model;
fig. 3 is a schematic view of still another alternative configuration of a heat recovery multi-split air conditioning system according to an embodiment of the present utility model.
Reference numerals illustrate:
1. an outdoor unit; 2. an indoor unit; 3. a first mode converter; 4. a second mode converter; 5. a low pressure bypass valve; 6. a low pressure solenoid valve; 7. a high pressure bypass valve; 8. a high pressure solenoid valve; 9. a low-voltage electronic expansion valve; 10. a high-pressure electronic expansion valve.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the utility model. Rather, they are merely examples of apparatus and methods consistent with aspects of the utility model as detailed in the accompanying claims.
Example 1
In the prior art, a heat recovery multi-split air conditioning system is usually only provided with one mode converter, and a control system is only aimed at the provided mode converter, and if different mode converters are provided, the control and the mode converters are not matched, so that the operation effect is poor or abnormal noise is generated.
Fig. 1 shows an optional schematic structural diagram of a heat recovery multi-split air conditioning system, and as shown in fig. 1, the heat recovery multi-split air conditioning system includes: indoor set, mode converter, low pressure bypass valve, low pressure solenoid valve, high pressure bypass valve, high pressure solenoid valve, off-premises station. Fig. 1 employs a first mode converter 3 employing a solenoid valve, which may also be replaced with other control valves. The first mode converter 3 further comprises a piping assembly comprising: the high-pressure air pipe section, the low-pressure air pipe section and the inner machine air pipe section, wherein one end of the high-pressure air pipe section is connected with an outdoor high-pressure air pipe, the other end of the high-pressure air pipe section is connected with the inner machine air pipe section, one end of the low-pressure air pipe section is connected with an outdoor low-pressure air pipe, the other end of the low-pressure air pipe section is connected with the inner machine air pipe section, and the inner machine air pipe section is also connected with an indoor air pipe; as shown in fig. 1, the high-pressure solenoid valve 8 is provided at a high-pressure spool piece of the first mode converter 3; the high-pressure balance valve 7 is arranged in parallel with the high-pressure electromagnetic valve 8, and the circulation diameter of the high-pressure balance valve 7 is smaller than that of the high-pressure electromagnetic valve 8; the low-pressure solenoid valve 6 is arranged at the low-pressure gas pipe section of the first mode converter 3; the low-pressure balance valve 5 is arranged in parallel with the low-pressure solenoid valve 6, and the flow diameter of the low-pressure balance valve 5 is smaller than that of the low-pressure solenoid valve 6.
When it is detected that only the first mode converter 3 is present in the system, it is controlled as follows:
the indoor unit 2 performs refrigeration operation: the corresponding mode converter is opened with the low-pressure balance valve 5 and the high-pressure solenoid valve 8 and the high-pressure balance valve 7 are closed;
the indoor unit 2 heats the operation: the high-pressure electromagnetic valve 8 and the high-pressure balance valve 7 of the corresponding mode converter are opened, and the low-pressure electromagnetic valve 6 and the low-pressure balance valve 5 are closed;
when the indoor unit 2 is switched from the cooling operation to the heating operation: the corresponding mode converter is characterized in that a low-pressure electromagnetic valve 6 and a low-pressure balance valve 5 are closed, a high-pressure balance valve 7 is opened after time T1, and a high-pressure electromagnetic valve 8 is opened after time T2;
when the indoor unit 2 is switched from the heating operation to the cooling operation: the high-pressure electromagnetic valve 8 and the high-pressure balance valve 7 of the corresponding mode converter are closed, the low-pressure balance valve 5 is opened after the time T3, and the low-pressure balance valve 5 is closed after the time T4.
Fig. 2 shows another alternative structural schematic diagram of a heat recovery multi-split air conditioning system, as shown in fig. 2, where the heat recovery multi-split air conditioning system includes: a low-voltage electronic expansion valve and a high-voltage electronic expansion valve. The mode converter in fig. 2 is a second mode converter 4, which uses an electronic expansion valve. The second mode converter 4 likewise comprises a line assembly comprising: the high-pressure air pipe section, the low-pressure air pipe section and the inner machine air pipe section, wherein one end of the high-pressure air pipe section is connected with an outdoor high-pressure air pipe, the other end of the high-pressure air pipe section is connected with the inner machine air pipe section, one end of the low-pressure air pipe section is connected with an outdoor low-pressure air pipe, the other end of the low-pressure air pipe section is connected with the inner machine air pipe section, and the inner machine air pipe section is also connected with an indoor air pipe; as shown in fig. 2, a high-pressure electronic expansion valve 10 is provided at the high-pressure gas pipe section of the second mode converter 4; a low-pressure electronic expansion valve 9 is provided in the low-pressure gas pipe section of the second mode converter 4.
When it is detected that only the second mode converter 4 is present in the system, it is controlled as follows:
the indoor unit 2 performs refrigeration operation: the corresponding mode converter low-voltage electronic expansion valve 9 is opened, and the high-voltage electronic expansion valve 10 is closed;
the indoor unit 2 heats the operation: the high-pressure electronic expansion valve 10 of the corresponding mode converter is opened, and the low-pressure electronic expansion valve 9 is closed;
when the indoor unit 2 is switched from the cooling operation to the heating operation: the high-pressure electronic expansion valve 10 is opened for a certain number of steps after t1 time, and the high-pressure electronic expansion valve 10 is completely opened after t2 time, corresponding to the closing of the low-pressure electronic expansion valve 9 of the mode converter;
when the indoor unit 2 is switched from the heating operation to the cooling operation: the high-pressure electronic expansion valve 10 of the corresponding mode converter is closed, the low-pressure electronic expansion valve 9 is opened for a certain number of steps after t1, and the low-pressure electronic expansion valve 9 is completely opened after t 2.
In a preferred embodiment 1 of the present utility model, there is further provided another air conditioning system of a heat recovery multi-split air conditioning system, and fig. 3 shows another optional schematic structural diagram of the heat recovery multi-split air conditioning system, and as shown in fig. 3, the heat recovery multi-split air conditioning system includes:
the outdoor unit 1, at least two indoor units 2 and mode converters which are arranged in one-to-one correspondence with the indoor units 2; the mode converter includes at least: a first mode converter 3 and a second mode converter 4, each of the first mode converter 3 and the second mode converter 4 including a control valve assembly for controlling a flow direction of the refrigerant;
the control valve assembly of the first mode converter 3 includes: a high-pressure electromagnetic valve 8, a high-pressure electromagnetic valve 6, a high-pressure balance valve 7 arranged in parallel with the high-pressure electromagnetic valve 8, and a low-pressure balance valve 5 arranged in parallel with the high-pressure electromagnetic valve 6;
the control valve assembly of the second mode converter 4 includes: a high-pressure electronic expansion valve 10 and a low-pressure electronic expansion valve 9;
when the indoor units 2 corresponding to the first mode converter 3 and the second mode converter 4 switch the operation modes at the same time, the first mode converter 3 and the second mode converter 4 close the opened control valve assembly at the same time, and simultaneously gradually open the control valves corresponding to the operation modes to be switched in the first mode converter 3 and the second mode converter 4.
In the embodiment, the heat recovery multi-split air conditioning system compatible with the two mode converters is provided, and for the heat recovery multi-split air conditioning system, a control scheme compatible with the two mode converters is automatically adopted, especially when an indoor unit switches an operation mode at the same time, the first mode converter and the second mode converter simultaneously close an opened control valve assembly, and meanwhile, control valves corresponding to the operation mode to be switched in the first mode converter and the second mode converter are gradually opened.
Based on the further improvement of the above scheme, when the indoor units 2 corresponding to the first mode converter 3 and the second mode converter 4 are simultaneously switched from the cooling mode to the heating mode, the low-pressure electromagnetic valve 6 and the low-pressure balance valve 5 of the first mode converter 3 are closed, and the low-pressure electronic expansion valve 9 of the second mode converter 4 is closed; after a first preset time, the high-pressure balance valve 7 of the first mode converter 3 is opened, and the high-pressure electronic expansion valve 10 of the second mode converter 4 is opened for a preset number of steps; after a second preset time, the high-pressure solenoid valve 8 of the first mode converter 3 is opened, and the high-pressure solenoid expansion valve 10 of the second mode converter 4 is fully opened;
when the indoor units 2 corresponding to the first mode converter 3 and the second mode converter 4 are simultaneously switched from the heating mode to the cooling mode, the high-pressure electromagnetic valve 8 and the high-pressure balance valve 7 of the first mode converter 3 are closed, and the high-pressure electronic expansion valve 10 of the second mode converter 4 is closed; after a third preset time, the low-pressure balance valve 5 of the first mode converter 3 is opened, and the low-pressure electronic expansion valve 9 of the second mode converter 4 is opened by a preset number of steps; after a fourth preset time, the low-pressure solenoid valve 6 of the first mode converter 3 is opened and the low-pressure solenoid expansion valve 9 of the second mode converter 4 is fully opened.
In another alternative embodiment of the present utility model, when the indoor units 2 corresponding to the first mode converter 3 and the second mode converter 4 are not simultaneously switched to the operation mode, and the indoor unit 2 corresponding to the first mode converter 3 or the second mode converter 4 is switched from the cooling mode to the heating mode, the low-pressure electromagnetic valve 6 and the low-pressure balance valve 5 are closed, the high-pressure balance valve 7 is opened after a fifth preset time, the high-pressure electromagnetic valve 8 is opened after a sixth preset time, or the high-pressure electronic expansion valve 9 is closed, the high-pressure electronic expansion valve 10 is opened for a certain number of steps after a seventh preset time, and the high-pressure electronic expansion valve 10 is completely opened after an eighth time;
when the indoor units 2 corresponding to the first mode converter 3 and the second mode converter 4 are not switched to the operation mode at the same time, and the indoor units 2 corresponding to the first mode converter 3 or the second mode converter 4 are switched to the refrigeration mode from the heating mode, the high-pressure electromagnetic valve 8 and the high-pressure balance valve 7 are closed, the low-pressure balance valve 5 is opened after a ninth preset time, the low-pressure electromagnetic valve 6 is opened after a tenth preset time, or the high-pressure electromagnetic expansion valve 10 is closed, the low-pressure electromagnetic expansion valve 9 is opened for a certain step number after an eleventh preset time, and the low-pressure electromagnetic expansion valve 9 is completely opened after a twelfth time;
the first preset time is the maximum of the fifth preset time and the seventh preset time, the second preset time is the maximum of the sixth preset time and the eighth preset time, the third preset time is the maximum of the ninth preset time and the eleventh preset time, and the fourth preset time is the maximum of the tenth preset time and the twelfth preset time. The time can be set to ensure that the control valve assembly is orderly opened in batches, and the control valves of the two mode converters can be ensured to have enough time to complete preset actions in the process of opening each batch, so that the control accuracy is ensured.
As an alternative embodiment of the above control scheme, when the simultaneous presence of the first mode converter 3 and the second mode converter 4 in the system is detected, if the internal machine under the first mode converter 3 and the internal machine under the second mode converter 4 switch modes simultaneously, the control is performed as follows, otherwise the two mode converters are controlled as described above when the first mode converter 3 or the second mode converter 4 is separately present, respectively:
when the indoor unit 2 is switched from the cooling operation to the heating operation: the low-pressure electromagnetic valve 6 and the low-pressure balance valve 5 corresponding to the first mode converter 3 are closed, and the low-pressure electromagnetic expansion valve 9 corresponding to the second mode converter 4 is closed; after time A1, the high-pressure balance valve 7 of the first mode converter 3 is opened, and the high-pressure electronic expansion valve 10 of the second mode converter 4 is opened for a certain number of steps; after time A2, the high-pressure solenoid valve 8 of the first mode converter 3 is opened, and the high-pressure solenoid expansion valve 10 of the second mode converter 4 is fully opened;
when the indoor unit 2 is switched from the heating operation to the cooling operation: the high-pressure electromagnetic valve 8 and the high-pressure balance valve 7 corresponding to the first mode converter 3 are closed, and the high-pressure electronic expansion valve 10 corresponding to the second mode converter 4 is closed; after time A3, the low-pressure balance valve 5 of the first mode converter 3 is opened, and the low-pressure electronic expansion valve 9 of the second mode converter 4 is opened for a certain number of steps; after time A4, the low-pressure solenoid valve 6 of the first mode converter 3 is opened, and the low-pressure solenoid expansion valve 9 of the second mode converter 4 is fully opened;
wherein A1 is the greater of T1 and T1; a2 is the greater of T2 and T2; a3 is the greater of T3 and T3; a4 is the larger of T4 and T4.
When two mode converters exist in the heat recovery multi-split air conditioning system, the two mode converters are automatically compatible. The mode converter control technology of the utility model can be used together with different types of mode converters, thus avoiding abnormal operation caused by mismatching and reducing the maintenance difficulty of the heat recovery multi-split air conditioning system.
Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the utility model being indicated by the following claims.
It is to be understood that the utility model is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.
Claims (4)
1. A heat recovery multi-split air conditioning system, comprising:
the outdoor unit (1), at least two indoor units (2) and mode converters which are arranged in one-to-one correspondence with the indoor units (2); the mode converter includes at least: a first mode converter (3) and a second mode converter (4), the first mode converter (3) and the second mode converter (4) each comprising a control valve assembly for controlling the flow direction of a refrigerant;
the control valve assembly of the first mode converter (3) comprises: a high-pressure electromagnetic valve (8), a high-pressure electromagnetic valve (6), a high-pressure balance valve (7) arranged in parallel with the high-pressure electromagnetic valve (8), and a low-pressure balance valve (5) arranged in parallel with the high-pressure electromagnetic valve (6);
the control valve assembly of the second mode converter (4) comprises: a high-pressure electronic expansion valve (10) and a low-pressure electronic expansion valve (9);
when the indoor units (2) corresponding to the first mode converter (3) and the second mode converter (4) switch operation modes at the same time, the first mode converter (3) and the second mode converter (4) close the opened control valve assembly at the same time, and control valves corresponding to operation modes to be switched in the first mode converter (3) and the second mode converter (4) are opened gradually at the same time.
2. The heat recovery multi-split air conditioning system of claim 1, wherein,
when the indoor units (2) corresponding to the first mode converter (3) and the second mode converter (4) are simultaneously switched from a refrigerating mode to a heating mode, the low-pressure electromagnetic valve (6) and the low-pressure balance valve (5) of the first mode converter (3) are closed, and the low-pressure electronic expansion valve (9) of the second mode converter (4) is closed; after a first preset time, the high-pressure balance valve (7) of the first mode converter (3) is opened, and the high-pressure electronic expansion valve (10) of the second mode converter (4) is opened for a preset number of steps; after a second preset time, the high-pressure solenoid valve (8) of the first mode converter (3) is opened, and the high-pressure electronic expansion valve (10) of the second mode converter (4) is fully opened;
when the indoor units (2) corresponding to the first mode converter (3) and the second mode converter (4) are simultaneously switched from a heating mode to a cooling mode, the high-pressure electromagnetic valve (8) and the high-pressure balance valve (7) of the first mode converter (3) are closed, and the high-pressure electronic expansion valve (10) of the second mode converter (4) is closed; after a third preset time, the low pressure balancing valve (5) of the first mode converter (3) is opened, and the low pressure electronic expansion valve (9) of the second mode converter (4) is opened for a preset number of steps; after a fourth preset time, the low-pressure solenoid valve (6) of the first mode converter (3) is opened and the low-pressure electronic expansion valve (9) of the second mode converter (4) is fully opened.
3. The heat recovery multi-split air conditioning system of claim 2, wherein,
when the indoor units (2) corresponding to the first mode converter (3) and the second mode converter (4) are not switched to an operation mode at the same time, and the indoor units (2) corresponding to the first mode converter (3) or the second mode converter (4) are switched to the heating mode from the cooling mode, the low-pressure electromagnetic valve (6) and the low-pressure balance valve (5) are closed, the high-pressure balance valve (7) is opened after a fifth preset time, the high-pressure electromagnetic valve (8) is opened after a sixth preset time, or the low-pressure electronic expansion valve (9) is closed, the high-pressure electronic expansion valve (10) is opened for a certain step number after a seventh preset time, and the high-pressure electronic expansion valve (10) is completely opened after an eighth preset time;
when the indoor units (2) corresponding to the first mode converter (3) and the second mode converter (4) are not simultaneously switched to an operation mode, and the indoor units (2) corresponding to the first mode converter (3) or the second mode converter (4) are switched to the refrigeration mode from the heating mode, the high-pressure electromagnetic valve (8) and the high-pressure balance valve (7) are closed, the low-pressure balance valve (5) is opened after a ninth preset time, the low-pressure electromagnetic valve (6) is opened after a tenth preset time, or the high-pressure electronic expansion valve (10) is closed, the low-pressure electronic expansion valve (9) is opened for a certain step number after an eleventh preset time, and the low-pressure electronic expansion valve (9) is completely opened after a twelfth preset time;
wherein the first preset time is the maximum of the fifth preset time and the seventh preset time, the second preset time is the maximum of the sixth preset time and the eighth preset time, the third preset time is the maximum of the ninth preset time and the eleventh preset time, and the fourth preset time is the maximum of the tenth preset time and the twelfth preset time.
4. The heat recovery multi-split air conditioning system according to claim 1, wherein the first mode converter (3) and the second mode converter (4) each comprise a piping assembly comprising: the high-pressure air pipe section, the low-pressure air pipe section and the inner machine air pipe section, wherein one end of the high-pressure air pipe section is connected with an outdoor high-pressure air pipe, the other end of the high-pressure air pipe section is connected with the inner machine air pipe section, one end of the low-pressure air pipe section is connected with an outdoor low-pressure air pipe, the other end of the low-pressure air pipe section is connected with the inner machine air pipe section, and the inner machine air pipe section is also connected with an indoor air pipe;
the high-pressure electromagnetic valve (8) is arranged on the high-pressure air pipe section of the first mode converter (3); the high-pressure balance valve (7) is arranged in parallel with the high-pressure electromagnetic valve (8), and the circulation diameter of the high-pressure balance valve (7) is smaller than that of the high-pressure electromagnetic valve (8); the low-pressure electromagnetic valve (6) is arranged at the low-pressure gas pipe section of the first mode converter (3); the low-pressure balance valve (5) is arranged in parallel with the low-pressure electromagnetic valve (6), and the circulation diameter of the low-pressure balance valve (5) is smaller than that of the low-pressure electromagnetic valve (6);
the high-pressure electronic expansion valve (10) is arranged on the high-pressure gas pipe section of the second mode converter (4); the low-pressure electronic expansion valve (9) is arranged at the low-pressure gas pipe section of the second mode converter (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321633507.1U CN220567392U (en) | 2023-06-26 | 2023-06-26 | Heat recovery multi-split air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321633507.1U CN220567392U (en) | 2023-06-26 | 2023-06-26 | Heat recovery multi-split air conditioning system |
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| Publication Number | Publication Date |
|---|---|
| CN220567392U true CN220567392U (en) | 2024-03-08 |
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ID=90100940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321633507.1U Active CN220567392U (en) | 2023-06-26 | 2023-06-26 | Heat recovery multi-split air conditioning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220567392U (en) |
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2023
- 2023-06-26 CN CN202321633507.1U patent/CN220567392U/en active Active
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