CN112413750A - Multi-split air conditioning system and refrigerating and heating method thereof - Google Patents
Multi-split air conditioning system and refrigerating and heating method thereof Download PDFInfo
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- CN112413750A CN112413750A CN202011262679.3A CN202011262679A CN112413750A CN 112413750 A CN112413750 A CN 112413750A CN 202011262679 A CN202011262679 A CN 202011262679A CN 112413750 A CN112413750 A CN 112413750A
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- Prior art keywords
- air pipe
- split system
- circulation loop
- liquid
- heat exchanger
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000010438 heat treatment Methods 0.000 title claims abstract description 11
- 238000004378 air conditioning Methods 0.000 title description 3
- 239000007788 liquid Substances 0.000 claims abstract description 49
- 239000003507 refrigerant Substances 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims 1
- 210000003437 trachea Anatomy 0.000 abstract 5
- 238000005057 refrigeration Methods 0.000 description 6
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
- F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention discloses a multi-split system and a refrigerating and heating method thereof, wherein the multi-split system comprises an outdoor unit and an indoor unit, the outdoor unit is provided with an external circulation loop, the indoor unit is provided with an internal circulation loop, a refrigerant in the internal circulation loop is water, the multi-split system also comprises a mode converter, a heat exchanger is arranged in the mode converter, and the external circulation loop and the internal circulation loop exchange heat in the heat exchanger; outer circulation circuit includes first trachea, second trachea and liquid pipe, and the switch-on is switched with first trachea or second trachea to the liquid pipe, and first tracheal pressure is greater than the second trachea. Compared with the prior art, the invention realizes the normal heating or refrigerating function of the indoor unit by the heat exchange of the heat exchanger between the external circulation loop and the internal circulation loop, and the medium circulating in the internal circulation loop is water, so that the normal use of the multi-split air conditioner is not influenced, and the potential safety hazard caused by the leakage of other types of refrigerants except water into the room is avoided.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a multi-split air conditioner system and a refrigerating and heating method thereof.
Background
The heat recovery multi-split air conditioner is a multi-split air conditioner system which can realize that part of indoor units refrigerate and part of indoor units heat simultaneously, the indoor units are connected with the outdoor units through mode converters, and the mode converters are used for controlling the connection states of the indoor unit pipelines and the outdoor unit pipelines so as to control the operation modes of the indoor units. In the existing multi-split air conditioning system, pipelines of all outdoor units and indoor units are communicated with each other, so that once a refrigerant leakage phenomenon occurs in the pipelines, all refrigerants in the system are leaked indoors, the refrigerant concentration in a room is too high, and great potential safety hazards exist.
Disclosure of Invention
The invention provides a multi-split air conditioner system and a refrigerating and heating method thereof, which solve the problem that in the prior art, the multi-split air conditioner has structural defects on the premise of meeting the refrigerating or heating function, and the refrigerant leaks into a room to bring potential safety hazards.
The technical scheme adopted by the invention is as follows: the outdoor unit is provided with an outer circulation loop, each indoor unit is provided with an inner circulation loop, a refrigerant in the inner circulation loop is water, the multi-split system further comprises a heat exchanger arranged outside the indoor unit, and the outer circulation loop and the inner circulation loop simultaneously flow through the heat exchanger to exchange heat.
Furthermore, each internal circulation loop corresponds to a heat exchanger, the external circulation loop comprises a first air pipe, a second air pipe and a liquid pipe which are externally connected with the outdoor unit, and the liquid pipe is switched and communicated with the first air pipe or the second air pipe through the heat exchanger to form a circulation loop.
Furthermore, the multiple on-line system also comprises a mode converter arranged between the indoor unit and the outdoor unit, and the heat exchanger is arranged in the mode converter.
Furthermore, the external circulation loop comprises a first main air pipe, a second main air pipe and a main liquid pipe which are connected with the outdoor unit, the first air pipe corresponding to each heat exchanger is connected in parallel with the first main air pipe, each second air pipe is connected in parallel with the second main air pipe, and each liquid pipe is connected in parallel with the main liquid pipe.
Furthermore, each liquid pipe is provided with a throttling device.
Further, the throttling device is an electronic expansion valve.
Furthermore, each first air pipe is provided with a first switch valve.
Furthermore, each second air pipe is provided with a second switch valve.
Furthermore, a water pump is arranged on the inner circulation loop.
The refrigeration method of the multi-split system as provided by the application, the pressure of the first air pipe is greater than that of the second air pipe, and the refrigeration method comprises the following steps: and communicating the second air pipe and the liquid pipe, controlling the liquid refrigerant of the outdoor unit to flow into the liquid pipe, throttling the liquid refrigerant in the liquid pipe, absorbing heat by the heat exchanger, changing the liquid refrigerant into a gaseous refrigerant, and then flowing back into the outdoor unit from the second air pipe.
The refrigeration method of the multi-split system as provided by the application, the pressure of the first air pipe is greater than that of the second air pipe, and the refrigeration method comprises the following steps: and communicating the first air pipe and the liquid pipe, controlling the gaseous refrigerant of the outdoor unit to flow into the heat exchanger through the first air pipe, and enabling the gaseous refrigerant to become a liquid refrigerant after heat release of the heat exchanger and then to flow back into the outdoor unit through the liquid pipe.
Compared with the prior art, the invention realizes the normal heating or refrigerating function of the indoor unit by the heat exchange of the heat exchanger between the external circulation loop and the internal circulation loop, and the medium circulating in the internal circulation loop is water, so that the normal use of the multi-split air conditioner is not influenced, and the potential safety hazard caused by the leakage of other types of refrigerants except water into the room is avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic diagram of a system structure of a multi-split air conditioner according to the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the multi-split air conditioner in the present application is mainly composed of three parts, i.e., at least one indoor unit 1, an outdoor unit 2, and a mode converter 3.
The outdoor unit 2 is externally connected with a first air pipe 21, a second air pipe 22 and a liquid pipe 23, and the liquid pipe 23 is switched and communicated with the first air pipe 21 or the second air pipe 22, so that an external circulation loop externally connected to the outdoor unit 2 is formed; each indoor unit 1 is externally connected with an internal circulation loop 11; the mode converter 3 is provided with the heat exchanger 31, each indoor unit 1 corresponds to one heat exchanger 31, the inner circulation loop 11 and the outer circulation loop simultaneously flow through the corresponding heat exchanger 31 for heat exchange, and the medium circulating in the inner circulation loop 11 is water.
Furthermore, in the present application, a first main air pipe 24, a second main air pipe 25 and a main air pipe 26 are externally connected to the outdoor unit 2, the first air pipe 21 of each heat exchanger 31 is connected to the first main air pipe 24 in parallel, the second air pipe 22 of each heat exchanger 31 is connected to the second main air pipe 25 in parallel, and the liquid pipe 23 of each heat exchanger 31 is connected to the main air pipe 26 in parallel, so that the circuit is simplified, and the first air pipe 21, the second air pipe 22 and the liquid pipe 23 are hidden in the mode converter 3, thereby greatly simplifying the circuit of the system.
Furthermore, each liquid pipe 23 is provided with a throttling device 231, and the throttling device 231 can be an electronic expansion valve; each first air pipe 21 is provided with a first switch valve 211 for controlling the on-off of the first air pipe, and each second air pipe 22 is provided with a second switch valve 221 for controlling the on-off of the second air pipe; each internal circulation loop 11 is also provided with a water pump 111 for controlling water circulation.
The application also provides a refrigeration method based on the multi-split system disclosed by the application, wherein the first air pipe 21 in the multi-split system is a high-pressure air pipe, the second air pipe 22 in the multi-split system is a low-pressure air pipe, and the refrigeration method comprises the following steps: when the indoor unit 1 needs to refrigerate, the corresponding throttling devices 231 on the liquid pipes 23 are opened, the second air pipes 22 are simultaneously controlled to be opened, the flowing direction of the refrigerant in the external circulation flow path is controlled to be the outdoor unit 2, the liquid pipes 23, the heat exchanger 31 and the second air pipes 22 in sequence, the liquid refrigerant flowing out of the outdoor unit 2 flows into the liquid pipes 23, the high-pressure liquid refrigerant is throttled by the throttling devices 231 and then changed into the low-pressure liquid refrigerant, the low-pressure liquid refrigerant enters the heat exchanger 31, exchanges heat with water in the internal circulation loop and evaporates, and the low-pressure liquid refrigerant is changed into the low-pressure gaseous refrigerant and then returns to the outdoor unit; the water in the internal circulation loop of the indoor unit 1 is pushed by the water pump 111, enters the heat exchanger 31 for heat release and temperature reduction, and carries the cold energy to the indoor through the internal circulation loop (which can be a fan coil).
The present application further proposes a heating method based on the multi-split system disclosed in the present application, wherein the first air pipe 21 in the multi-split system is a high pressure air pipe, the second air pipe 22 in the multi-split system is a low pressure air pipe, and the heating method is as follows: when the indoor unit 1 needs to heat, the corresponding throttling devices 231 on the liquid pipes 23 are opened, the first air pipes 21 are controlled to be opened, the flowing direction of the refrigerant in the external circulation flow path is controlled to be the outdoor unit 2, the first air pipes 213, the heat exchanger 31 and the liquid pipes 23 in sequence, the high-pressure gaseous refrigerant flowing out of the outdoor unit 2 flows into the first air pipes 213, the high-pressure gaseous refrigerant enters the heat exchanger 31 to exchange heat with water in the internal circulation loop for condensation, and returns to the outdoor unit 2 through the liquid pipes 23 after being changed into the medium-pressure liquid refrigerant; the water in the internal circulation loop of the indoor unit 1 is pushed by the water pump 111, enters the heat exchanger 31 to absorb heat and raise the temperature, and the heat is brought into the room through the internal circulation loop (which may be a fan coil).
At the time of shutdown, the throttle 231, the first on-off valve 211, the second on-off valve 221, and the water pump 111 are closed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (11)
1. The multi-split system is characterized in that the outdoor unit is provided with an outer circulation loop, each indoor unit is provided with an inner circulation loop, a refrigerant in the inner circulation loop is water, the multi-split system further comprises a heat exchanger arranged outside the indoor units, and the outer circulation loop and the inner circulation loop simultaneously flow through the heat exchanger to exchange heat.
2. The multi-online system as claimed in claim 1, wherein each of the inner circulation circuits corresponds to a heat exchanger, the outer circulation circuit includes a first air pipe, a second air pipe and a liquid pipe externally connected to the outdoor unit, and the liquid pipe is switched to communicate with the first air pipe or the second air pipe through the heat exchanger to form a circulation circuit.
3. The multi-split system as claimed in claim 2, further comprising a mode converter disposed between the indoor unit and the outdoor unit, wherein the heat exchanger is disposed in the mode converter.
4. A multi-split system as claimed in claim 3, wherein the external circulation circuit includes a first main air pipe, a second main air pipe and a main liquid pipe connected to the outdoor unit, the first air pipe corresponding to each of the heat exchangers is connected in parallel to the first main air pipe, each of the second air pipes is connected in parallel to the second main air pipe, and each of the liquid pipes is connected in parallel to the main liquid pipe.
5. A multi-split system as claimed in claim 4, wherein a throttling means is provided on each of the liquid pipes.
6. A multi-split system as claimed in claim 5, wherein the throttling means is an electronic expansion valve.
7. The multi-split system as claimed in claim 4, wherein each of the first air pipes is provided with a first switching valve.
8. A multi-split system as claimed in claim 4, wherein each of the second air pipes is provided with a second switching valve.
9. A multi-split system as claimed in claim 1, wherein a water pump is provided on the inner circulation loop.
10. A method for refrigerating a multi-split system, wherein the multi-split system is as defined in any one of claims 2 to 8, and the pressure of the first air pipe is higher than that of the second air pipe, and the method for refrigerating the multi-split system comprises: and communicating the second air pipe and the liquid pipe, controlling the liquid refrigerant of the outdoor unit to flow into the liquid pipe, throttling the liquid refrigerant in the liquid pipe, absorbing heat by the heat exchanger, changing the liquid refrigerant into a gaseous refrigerant, and then flowing back into the outdoor unit from the second air pipe.
11. A heating method of a multi-split system, wherein the multi-split system is a multi-split system as claimed in any one of claims 2 to 8, the pressure of the first air pipe is greater than that of the second air pipe, and the cooling method comprises: and communicating the first air pipe and the liquid pipe, controlling the gaseous refrigerant of the outdoor unit to flow into the heat exchanger through the first air pipe, and enabling the gaseous refrigerant to become a liquid refrigerant after heat release of the heat exchanger and then to flow back into the outdoor unit through the liquid pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011262679.3A CN112413750A (en) | 2020-11-12 | 2020-11-12 | Multi-split air conditioning system and refrigerating and heating method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011262679.3A CN112413750A (en) | 2020-11-12 | 2020-11-12 | Multi-split air conditioning system and refrigerating and heating method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112413750A true CN112413750A (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011262679.3A Pending CN112413750A (en) | 2020-11-12 | 2020-11-12 | Multi-split air conditioning system and refrigerating and heating method thereof |
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| Country | Link |
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| CN (1) | CN112413750A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022267877A1 (en) * | 2021-06-21 | 2022-12-29 | 清华大学 | Multi-mode water-fluorine multi-split system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69100574D1 (en) * | 1990-03-19 | 1993-12-09 | Mitsubishi Electric Corp | Air conditioner. |
| CN207006398U (en) * | 2017-05-31 | 2018-02-13 | 珠海格力电器股份有限公司 | Heat recovery outer unit system and air conditioning system |
| CN109386986A (en) * | 2018-10-22 | 2019-02-26 | 广东美的暖通设备有限公司 | Two pipes system heat-reclamation multi-compressors system and its air-conditioner outdoor unit |
| CN109595720A (en) * | 2018-12-11 | 2019-04-09 | 际高科技有限公司 | A kind of multi-connected machine capillary radiation system |
-
2020
- 2020-11-12 CN CN202011262679.3A patent/CN112413750A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69100574D1 (en) * | 1990-03-19 | 1993-12-09 | Mitsubishi Electric Corp | Air conditioner. |
| CN207006398U (en) * | 2017-05-31 | 2018-02-13 | 珠海格力电器股份有限公司 | Heat recovery outer unit system and air conditioning system |
| CN109386986A (en) * | 2018-10-22 | 2019-02-26 | 广东美的暖通设备有限公司 | Two pipes system heat-reclamation multi-compressors system and its air-conditioner outdoor unit |
| CN109595720A (en) * | 2018-12-11 | 2019-04-09 | 际高科技有限公司 | A kind of multi-connected machine capillary radiation system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022267877A1 (en) * | 2021-06-21 | 2022-12-29 | 清华大学 | Multi-mode water-fluorine multi-split system |
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Application publication date: 20210226 |
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| RJ01 | Rejection of invention patent application after publication |