WO2022257482A1

WO2022257482A1 - Air conditioning system

Info

Publication number: WO2022257482A1
Application number: PCT/CN2022/074349
Authority: WO
Inventors: 马振豪; 孙冬松; 袁珊珊; 杨欢
Original assignee: 青岛海尔空调器有限总公司; 青岛海尔空调电子有限公司; 海尔智家股份有限公司
Priority date: 2021-06-11
Filing date: 2022-01-27
Publication date: 2022-12-15
Also published as: CN113531958A

Abstract

The present invention belongs to the field of air conditioning technology and specifically relates to an air conditioning system. The present invention aims to solve the current problem of an air conditioning system having difficulty normally operating due to unstable voltage during a peak electricity usage period. The provided air conditioning system comprises: a compressor, an electric two way valve, a main working path, a storage path, and a control unit; the electric two way valve is configured to connect an outlet of the compressor with of one among the main working path and the storage path; the storage path comprises: an accumulator, which is used for storing a cooling medium and performing cooling; the control unit is used during a non-peak electricity usage period to trigger the electric two way valve to connect the storage path with the outlet of the compressor according to a storage instruction, causing the accumulator to store the cooling medium; and the control unit is used during a peak electricity usage period for triggering the accumulator to supply the cooling medium to an indoor heat exchange branch path of the storage path according to a refrigeration instruction, where the indoor heat exchange branch path of the storage path is configured as separate from an indoor heat exchange branch path of the main working path.

Description

Air Conditioning System

This application claims the priority of the Chinese patent application with the application number 2021106599098 and the application title "air conditioning system" filed with the China Patent Office on June 11, 2021, the entire contents of which are incorporated herein by reference.

technical field

The invention belongs to the technical field of air conditioning, and in particular relates to an air conditioning system.

Background technique

Air conditioning system refers to a system that uses manual means to adjust and control the temperature, humidity, flow rate and other parameters of the ambient air in a building or structure.

In the related art, the refrigeration function of the air conditioning system is usually realized by absorbing heat through the change of the physical state of the refrigerant. For example, the compressor of the air conditioning system compresses the gaseous refrigerant into a high-temperature and high-pressure gaseous state, and sends it to the condenser for cooling. The high-pressure liquid refrigerant is throttled and reduced by the throttling device to become a low-temperature and low-pressure gas-liquid mixture, and the low-temperature and low-pressure gas-liquid mixture absorbs heat in the air through the evaporator and vaporizes into a gaseous state, thereby achieving the cooling effect.

However, due to the large power consumption of the compressor and other components of the above-mentioned air-conditioning system, and in the peak period of power consumption, multiple high-power electrical appliances are often run at the same time, which easily leads to voltage instability, which in turn makes the air-conditioning system difficult to operate. normal operation.

Contents of the invention

In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem that the existing voltage instability during the peak period of electricity consumption makes it difficult for the air-conditioning system to operate normally, the present invention provides an air-conditioning system. The air-conditioning system includes: machine, electric two-way valve, main working passage, reserve passage and control unit; the electric two-way valve is used to connect one of the main working passage and the reserve passage to the outlet of the compressor; the reserve The pathway includes: at least one accumulator, the accumulator is used to reserve and cool the refrigerant when the reserve pathway is connected to the outlet of the compressor; the control unit is used to During the period, the electric two-way valve is triggered according to the reserve command to conduct the reserve passage with the outlet of the compressor, so that the accumulator stores refrigerant; the control unit is used to According to the cooling instruction, the accumulator is triggered to provide refrigerant to the indoor heat exchange branch of the reserve passage for cooling; wherein, the indoor heat exchange branch of the reserve passage is set independently from the indoor heat exchange branch of the main working passage .

In a possible implementation manner, the indoor heat exchange branch of the main working passage and the indoor heat exchange branch of the storage passage are arranged in parallel in the heat exchange fins.

In a possible implementation manner, the indoor heat exchange branch of the main working passage and the indoor heat exchange branch of the storage passage are respectively arranged in corresponding heat exchange fins.

In a possible implementation manner, the accumulator includes multiple accumulators, and the pressure upper limit values of the multiple accumulators increase sequentially along the direction away from the outlet of the electric two-way valve; A sequence valve is connected between the valves, and the opening pressure of the sequence valve is equal to the pressure upper limit value adjacent to it and closer to the outlet of the electric two-way valve.

In a possible implementation manner, the air-conditioning system further includes: a first pressure relay, the first pressure relay is connected to an accumulator among the multiple accumulators that is farther away from the outlet of the electric two-way valve, the The first pressure switch is used to trigger the compressor to stop working when the actual pressure value of the accumulator connected to it reaches the corresponding pressure upper limit value.

In a possible implementation manner, the air conditioning system further includes: a first electric cut-off valve, the first electric cut-off valve is connected between the accumulator and the indoor heat exchange branch of the reserve passage, for The accumulator is connected or disconnected from the indoor heat exchange branch of the reserve passage; the air conditioning system also includes: a second pressure relay and a first check valve, the second pressure relay is connected to a plurality of accumulators The accumulator in the accumulator is closer to the outlet of the electric two-way valve, and the other accumulators in the multiple accumulators are connected to the indoor heat exchange branch of the reserve passage through the first one-way valve; wherein, the The second pressure switch is used to trigger the first electric cut-off valve to disconnect the accumulator from the indoor heat exchange branch of the reserve passage when the actual pressure value of the accumulator connected to it drops to the corresponding lower pressure limit. open.

In a possible implementation manner, the air conditioning system further includes: a second electric cut-off valve, the second electric cut-off valve is connected between the electric two-way valve and the accumulator, and is used to turn the electric The two-way valve is connected or disconnected from the accumulator.

In a possible implementation manner, the air conditioning system further includes: an air storage container and a second one-way valve, the inlet of the air storage container is connected to the indoor heat exchange branch of the reserve passage, and the air storage container The outlet of the container is connected with the compressor through the second one-way valve.

In a possible implementation manner, the air-conditioning system further includes: a storage battery, where the storage battery is used to supply power to an indoor fan of the air-conditioning system when the air-conditioning system is powered off.

In a possible implementation manner, the air conditioning system further includes: a manual shut-off valve, which is used to connect or disconnect the accumulator of the reserve passage from the indoor heat exchange branch under the action of an external force. open.

In a possible implementation manner, at least a part of the outer surface of the accumulator has cooling fins.

In a possible implementation manner, the control unit is also used to trigger the main working passage to perform refrigeration when the accumulator is disconnected from the indoor heat exchange branch of the storage passage; During the non-peak period of power consumption, the main working path is triggered to perform cooling according to the cooling instruction.

Those skilled in the art can understand that the air conditioning system of the present invention includes a compressor, an electric two-way valve, a main working passage, a reserve passage and a control unit, and the accumulator of the reserve passage can When the working channel is not cooling, the refrigerant is stored and cooled. During the peak period of power consumption, the control unit can trigger the accumulator to provide cooled refrigerant to the indoor heat exchange branch of the reserve channel according to the cooling command for cooling. , so that it is beneficial to reduce the power consumption of the air-conditioning system during the peak period of electricity consumption, to avoid the adverse impact of voltage instability on the air-conditioning system during the peak period of electricity consumption, to ensure the reliability of the air-conditioning system during the peak period of electricity consumption, and to extend the life of the air-conditioning system. The operating time of the system can be guaranteed, and the cooling effect of the air-conditioning system can be ensured to better meet the cooling needs of users; moreover, by setting the indoor heat exchange branch of the reserve channel and the indoor heat exchange branch of the main working channel independently, it can ensure The reserve passage and the main working passage are independent of each other, avoiding mutual interference between the two, and effectively ensuring the refrigeration performance of the main working passage.

Description of drawings

Preferred embodiments of the air conditioner of the present invention will be described below with reference to the accompanying drawings. Attached are:

Fig. 1 is a schematic structural view of an air conditioning system provided by an embodiment of the present invention;

Fig. 2 is a schematic diagram of the electrical connection of the air conditioning system provided by an embodiment of the present invention;

Fig. 3 is a schematic diagram of the flow direction of the refrigerant when the accumulator of the air conditioning system stores the refrigerant in an embodiment of the present invention;

Fig. 4 is a schematic diagram of the flow direction of the refrigerant when the air-conditioning system stores the refrigerant through the accumulator for cooling in an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of an air conditioning system provided by another embodiment of the present invention;

Fig. 6 is a schematic diagram of the flow direction of the refrigerant when the accumulator of the air conditioning system stores the refrigerant in another embodiment of the present invention;

Fig. 7 is a schematic diagram of the flow of refrigerant when the air conditioning system stores the refrigerant through the accumulator for cooling in another embodiment of the present invention.

In the drawings: 10-compressor; 30-electric two-way valve; 50-main working passage; 51-third electric stop valve; 52-outdoor heat exchanger; 53-first throttling device; 54-main working passage 55-third one-way valve; 70-reserve passage; 71-second electric cut-off valve; 72 accumulator; 73-sequence valve; 74-first pressure relay; 75-second pressure Relay; 76-the first one-way valve; 77-the first electric stop valve; 78-the second throttling device; 79-the indoor heat exchange branch of the reserve passage; 80-the gas storage container; 81-the second one-way valve ; 82-radiating fin; 83-manual shut-off valve; 90-control unit.

Detailed ways

First of all, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the embodiments of the present invention, and are not intended to limit the protection scope of the embodiments of the present invention. Those skilled in the art can make adjustments as needed so as to adapt to specific applications.

Secondly, it should be noted that in the description of the embodiments of the present invention, terms such as "inside" and "outside" indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are only for convenience Describes, but does not indicate or imply that the device or component must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the embodiments of the present invention.

In addition, it should be noted that in the description of the embodiments of the present invention, unless otherwise specified and limited, the terms "connected" and "connected" should be interpreted in a broad sense, for example, it can be a fixed connection or a flexible connection. Disassembled connection, or integral connection; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present invention according to specific situations.

The air conditioning system usually includes a compressor, an outdoor heat exchanger (or called a condenser), an indoor heat exchanger (or called an evaporator) and a throttling device; the compressor compresses the gaseous refrigerant into a high-temperature and high-pressure gaseous state, and Send it to the outdoor heat exchanger for cooling. The high-temperature and high-pressure gaseous refrigerant becomes a medium-temperature and high-pressure liquid refrigerant after being cooled, and the medium-temperature and high-pressure liquid refrigerant is throttled and depressurized by a throttling device to become a low-temperature and low-pressure gas-liquid. Mixture, the low-temperature and low-pressure gas-liquid mixture absorbs the heat in the air through the indoor heat exchanger and vaporizes into a gaseous state, thereby achieving the effect of refrigeration; the gaseous refrigerant returns to the compressor to continue compression, and continues to cycle for refrigeration.

During the peak period of electricity consumption, such as 19:00 to 21:00, users may run kitchen appliances such as integrated stoves, ovens, refrigerators and the above-mentioned air-conditioning systems at the same time. Kitchen appliances and air-conditioning systems are usually high-power appliances, and multiple households may run at the same time The commonly used high-power devices mentioned above can easily lead to unstable voltage for users, which in turn makes it difficult for the air conditioning system to operate normally.

The embodiment of the present invention is a further improvement on the air conditioning system described above to overcome the above problems. The preferred technical solutions of the air-conditioning system of the present invention will be described below in conjunction with the above.

Fig. 1 is a schematic structural diagram of an air-conditioning system provided by an embodiment of the present invention; Fig. 2 is a schematic diagram of electrical connections of the air-conditioning system provided by an embodiment of the present invention. Please refer to FIG. 1 and FIG. 2 , the air conditioning system provided by the embodiment of the present invention includes: a compressor 10 , an electric two-way valve 30 , a main working channel 50 , a reserve channel 70 and a control unit 90 . Specifically, the compressor 10 is used to provide compressed refrigerant; the outlet of the compressor 10 is connected to the electric two-way valve 30 . The electric two-way valve 30 is used to selectively connect the main working passage 50 and the reserve passage to the outlet of the compressor 10 according to the received signal. During the non-peak period of power consumption, the reserve channel 70 can store and cool the refrigerant under the control of the control unit 90; Refrigerant for cooling. After the refrigerant stored in the reserve passage 70 is released, under the control of the control unit 90 , the main working passage 50 can be used to realize the cooling function of the conventional air conditioning system, so as to ensure that the cooling demand of the user is met.

Exemplarily, the outlet of the compressor 10 is connected to the inlet P of the electric two-way valve 30, the electric two-way valve 30 has two outlets A, B, one of the outlets A of the electric two-way valve 30 is connected to the main working passage 50, The other outlet B of the electric two-way valve 30 is connected to the reserve passage 70, the electric two-way valve 30 can be electrically connected with the control unit 90, and the electric two-way valve 30 can connect its inlet with the control unit 90 according to the received signal. One outlet is connected, so that the main working passage 50 and the reserve passage 70 are alternatively connected to the compressor 10 .

For example, when the control unit 90 receives a reserve command sent by the user through a remote control or an operation panel or a smart terminal such as a smart phone or a tablet computer, the control unit 90 sends a first signal to the electric two-way valve 30, and the electric two-way valve 30 according to the first signal control to connect its inlet P and outlet B, so as to connect the compressor 10 and the reserve passage 70, so that the reserve passage 70 can store refrigerant; when the control unit 90 receives the When a normal cooling command is sent by a smart terminal such as a smart phone or a tablet computer, the control unit 90 sends a second signal to the electric two-way valve 30, and the electric two-way valve 30 controls its inlet P and outlet A to conduct according to the second signal, thereby The compressor 10 is connected to the main working passage 50 so that the main working passage 50 performs normal cooling.

In this example, optionally, the control unit 90 is configured to trigger the reserve passage 70 to store and cool the refrigerant according to the received reserve instruction when the main working passage 50 is not in the peak period of power consumption, so that the refrigerant reserve The process is completely independent of the refrigeration process.

The main working passage 50 can adopt the refrigeration passage structure of the existing air conditioner. For example, the main working passage 50 includes: an outdoor heat exchanger 52 , a first throttling device 53 , and an indoor heat exchange branch 54 . The outdoor heat exchanger 52 can be connected with the outlet A of the electric two-way valve 30; optionally, a third electric stop valve 51 can also be connected between the outdoor heat exchanger 52 and the electric two-way valve 30, and the third electric stop valve 51 can be electrically connected with the control unit 90, and the control unit 90 is used to control the third electric shut-off valve 51 to connect or disconnect the outdoor heat exchanger 52 from the electric two-way valve 30, so that only at the entrance of the electric two-way valve 30 When P is connected to the outlet A and the third electric shut-off valve 51 connects the outdoor heat exchanger 52 and the electric two-way valve 30, the main working passage 50 can perform refrigeration, which is beneficial to ensure that the main working passage 50 and the reserve passage 70 are independent of each other. Non-interference with each other is conducive to ensuring the reliability of their work. Wherein, the third electric cut-off valve 51 is normally open when de-energized. The outdoor heat exchanger 52 is connected with the indoor heat exchange branch 54 through the first throttling device 53 . The indoor heat exchange branch 54 is connected to the inlet of the compressor 10 through a third one-way valve 55 .

Please continue to refer to FIG. 1. When the main working passage 50 performs refrigeration according to the instruction of the control unit 90, the compressor 10 starts, and the flow of the refrigerant is shown by the straight arrow in FIG. 1. The compressor 10 compresses the gaseous refrigerant to high temperature and high pressure. and send it to the outdoor heat exchanger 52 for cooling. The high-temperature and high-pressure gaseous refrigerant becomes a medium-temperature and high-pressure liquid refrigerant after being cooled, and the medium-temperature and high-pressure liquid refrigerant is throttled and depressurized by the first throttling device 53 to become The low-temperature and low-pressure gas-liquid mixture, the low-temperature and low-pressure gas-liquid mixture absorbs the heat in the air through the indoor heat exchange branch 54 and vaporizes into a gaseous state. Since the indoor heat exchange branch 54 absorbs the heat in the indoor air, the indoor temperature Will drop, so as to achieve the cooling effect. The gaseous refrigerant will enter the compressor 10 to continue compression, and continue to circulate for refrigeration.

The main working passage 50 may be arranged in parallel with the reserve passage 70 . The reserve passage 70 includes at least one accumulator 72 . The accumulator 72 is used to reserve and cool the refrigerant when the reserve passage 70 is connected to the outlet of the compressor 10 , so that the air conditioning system can reserve the cooled refrigerant in advance through the accumulator 72 . When the air-conditioning system uses the accumulator 72 to pre-reserve the cooling refrigerant for cooling, the main working passage 50 does not need to work, and components with large power consumption such as the compressor 10 do not need to work, which is beneficial to reduce the power consumption of the air-conditioning system.

The accumulator 72 can cool the refrigerant entering it through common heat dissipation methods such as conduction heat dissipation, radiation heat dissipation, and convection heat dissipation. In some examples, the outer surface of the accumulator 72 has cooling fins 82 to increase the heat dissipation area of the accumulator 72 to ensure the cooling effect of the refrigerant in the accumulator 72, thereby helping to ensure the cooling effect of the air conditioning system; Wherein, the present embodiment does not limit the specific structure of the heat sink 82, and it can only realize its heat dissipation function. For example, the heat sink 82 may include a substrate connected to the accumulator 72, and a plurality of spaced apart fins are arranged on the substrate. The fins extend in a direction away from the accumulator 72 . It can be understood that: in the case of not interfering with the installation of the accumulator 72 and the pipelines connected with other components, the more areas where the cooling fins 82 are arranged on the outer surface of the accumulator 72, the greater the impact on the energy accumulator 72. The cooling speed and cooling effect of the refrigerant are better. During specific implementation, the installation area of the heat sink 82 can be selected according to actual needs, so as to be able to take into account both the cooling speed and the cost of the system. In other examples, the accumulator 72 may have a medium with a lower temperature capable of cooling the refrigerant entering the accumulator 72, so as to achieve the purpose of cooling the refrigerant; or, the accumulator 72 is provided with a fan, through The fan accelerates the flow of air around the accumulator 72, thereby achieving the purpose of cooling the refrigerant. Certainly, the implementation manner of cooling the refrigerant by the accumulator is not limited thereto, and this embodiment is only an example for illustration.

Optionally, the accumulator 72 may be connected to the electric two-way valve 30 through the second electric cut-off valve 71 . The second electric stop valve 71 can be electrically connected with the control unit 90 , and the second electric stop valve 71 is used to connect or disconnect the electric two-way valve 30 and the accumulator 72 under the control of the control unit 90 . In this way, only when the inlet P of the electric two-way valve 30 is connected to the outlet B and the second electric stop valve 71 connects the accumulator 72 and the electric two-way valve 30, the reserve channel 70 can be reserved, which is beneficial to ensure the main work The passage 50 and the reserve passage 70 are independent of each other and do not interfere with each other, which is beneficial to ensure their respective working reliability. Wherein, the second electric cut-off valve 71 is normally closed when de-energized.

Optionally, a control valve is connected between the accumulator 72 and the indoor heat exchange branch 79 of the reserve passage 70 . The control valve is used to control the connection between the accumulator 72 and the indoor heat exchange branch 79 of the reserve passage 70 . Exemplarily, the control valve includes a first electric cut-off valve 77, and the first electric cut-off valve 77 is used to connect the accumulator 72 with the indoor heat exchange branch 79 under the control of the control unit 90 so that the accumulator 72 can The indoor heat exchange branch 79 provides refrigerant to realize cooling, and the first electric cut-off valve 77 is also used to disconnect the accumulator 72 from the indoor heat exchange branch 79 under the control of the control unit 90 so that the accumulator 72 stops charging The indoor heat exchange branch 79 provides refrigerant, and the indoor heat exchange branch 79 stops cooling the room. Wherein, the first electric shut-off valve 77 is opened by electricity. In other examples, the control valve can also use other valves with on-off functions such as reversing valves; valve instead.

In this example, the indoor heat exchange branch 79 of the storage passage 70 and the indoor heat exchange branch 54 of the main working passage 50 are set independently, so that the storage passage 70 and the main working passage 50 can be guaranteed to be independent of each other, and mutual interference between the two can be avoided. , effectively ensuring the refrigeration performance of the main working channel 50 .

In some examples, the indoor heat exchange branch 54 of the main working passage 50 and the indoor heat exchange branch 79 of the storage passage 70 are respectively disposed in corresponding heat exchange fins. In other words, the air conditioning system is provided with two sets of independent indoor heat exchangers, one set of indoor heat exchangers forms the indoor heat exchange branch 79 of the reserve passage 70 , and the other set of indoor heat exchangers forms the branch of the main working passage 50 . Indoor heat exchange branch 54.

Specifically, the indoor heat exchange branch 54 of the main working passage 50 may include a first throttling device 53, a group of indoor heat exchangers, and a third one-way valve 55 connected in sequence, and the outlet of the third one-way valve 55 is connected to Compressor 10 inlet. Wherein, the third one-way valve 55 allows the refrigerant to only flow from the indoor heat exchange branch 54 of the main working passage 50 to the compressor 10 , which can effectively prevent backflow of the refrigerant and ensure the reliability of the reserve passage 70 .

The indoor heat exchange branch 79 of the reserve passage 70 may include a second throttling device 78, another group of indoor heat exchangers, a gas storage container 80, a second one-way valve 81, and the outlet of the second one-way valve 81 connected in sequence. Connect to compressor 10 inlet. Wherein, when the refrigerant stored in the accumulator 72 is used for cooling, the compressor 10 does not work. At this time, the gas storage container 80 is used to accommodate the flow out of the indoor heat exchange branch 79 of the reserve passage 70 when the accumulator 72 supplies the refrigerant. Gas, so that the compressor 10 does not need to work, which is beneficial to further reduce the power consumption of the air conditioning system at this time; the second check valve 81 allows the refrigerant to only enter the compressor 10 from the gas storage container 80, which can effectively prevent the refrigerant from flowing backward and prevent the main operation The refrigerant in the passage 50 enters the gas storage container 80 , which is beneficial to ensure the working reliability of the main working passage 50 .

In this example, the indoor heat exchange branch 54 of the main working passage 50 and the indoor heat exchange branch 79 of the reserve passage 70 are respectively formed by using two sets of indoor heat exchangers, which is beneficial to further ensure the independence of the two passages, and the two The setting position of the corresponding pipeline in the channel is more flexible. By making the pipelines in the indoor heat exchange branch 79 of the reserve passage 70 and the indoor heat exchange branch 54 of the main working passage 50 completely independent of each other, when a part in one of the passages fails, the other passage can still be normal. work, the air conditioning system can still cool.

Fig. 5 is a schematic structural diagram of an air conditioning system provided by another embodiment of the present invention. Please refer to FIG. 5 , in some other examples, the indoor heat exchange branch 79 of the reserve passage 70 and the indoor heat exchange branch 54 of the main working passage 50 are arranged in heat exchange fins in parallel. In other words, there are two sets of mutually independent pipelines juxtaposed in the heat exchange fins of the indoor heat exchanger, one of which is used to form the indoor heat exchange branch 79 of the reserve passage 70, and the other pipeline is used to form the main The indoor heat exchange branch 54 of the working passage 50 .

Specifically, the indoor heat exchange branch 54 of the main working passage 50 may include a first throttling device 53 connected in sequence, a pipeline located at the heat exchange fin, a third one-way valve 55, and the third one-way valve 55 The outlet is connected to the compressor 10 inlet. Wherein, the third one-way valve 55 allows the refrigerant to only flow from the indoor heat exchange branch 54 of the main working passage 50 to the compressor 10 , which can effectively prevent backflow of the refrigerant and ensure the reliability of the reserve passage 70 .

The indoor heat exchange branch 79 of the reserve passage 70 may include a second throttling device 78 connected in sequence, another pipeline located at the heat exchange fin, an air storage container 80, a second one-way valve 81, and the second one-way valve The outlet of 81 is connected to the compressor 10 inlet. Wherein, when the refrigerant stored in the accumulator 72 is used for cooling, the compressor 10 does not work. At this time, the gas storage container 80 is used to accommodate the flow out of the indoor heat exchange branch 79 of the reserve passage 70 when the accumulator 72 supplies the refrigerant. Gas, the second one-way valve 81 makes the refrigerant can only enter the compressor 10 from the gas storage container 80, which can effectively prevent the refrigerant from flowing backwards, prevent the refrigerant in the main working passage 50 from entering the gas storage container 80, and help ensure the reliable operation of the main working passage 50 sex.

In this example, the cost of the air conditioning system is reduced by setting two independent sets of pipelines in an indoor heat exchanger. By making the pipelines in the indoor heat exchange branch 79 of the reserve passage 70 and the indoor heat exchange branch 54 of the main working passage 50 completely independent of each other, when a part in one of the passages fails, the other passage can still be normal. work, the air conditioning system can still cool.

The control unit 90 is used to control the working state of the air conditioning system by controlling the actions of electric devices such as the electric two-way valve 30 , the first electric stop valve 77 , the second electric stop valve 71 , and the third electric stop valve 51 . During specific implementation, the control unit 90 may include a controller. The control unit 90 can specifically control the air conditioning system to be in the state of storing refrigerant, or control the air conditioning system to be in the state of using the stored refrigerant for cooling, or control the air conditioning system to be in the state of cooling through the main working channel 50 . That is to say, the control unit 90 can control the air conditioning system to be in a state of storing refrigerant, a state of cooling with the stored refrigerant, or a state of cooling through the main working passage 50 . In other words, the control unit 90 can control the air conditioning system to be in one of the state of storing refrigerant, the state of cooling with the stored refrigerant, and the state of cooling through the main working passage 50 .

For example, when the control unit 90 receives a reserve instruction from the smart terminal, the control unit 90 can first obtain the current time and the state of the main working path 50, and then determine that it is in a non-peak period of power consumption according to the obtained current time. And according to the state of the main working passage 50, when it is determined that the main working passage 50 is not cooling, the control unit 90 triggers the electric two-way valve 30 to connect the reserve passage 70 with the outlet of the compressor 10 according to the reserve instruction, so that the accumulator 72 stores the refrigerant and Cool the refrigerant.

When the control unit 90 receives the cooling instruction from the smart terminal, the control unit 90 can first acquire the current time, and when the control unit 90 determines that it is in the peak period of electricity consumption according to the acquired current time, the control unit 90 The period cooling priority triggers the accumulator 72 to supply refrigerant to the indoor heat exchange branch 79 of the reserve passage 70 for cooling, and triggers the main working passage 50 to perform cooling after it is determined that the refrigerant stored in the accumulator 72 is released. Among them, the cooling priority during the peak period of electricity consumption can be set by the user according to his own situation.

When the control unit 90 receives the cooling command from the smart terminal, the control unit 90 can first obtain the current time, and when the control unit 90 determines that it is in a non-peak period of power consumption according to the obtained current time, the control unit 90 triggers the main work according to the cooling command Passage 50 is refrigerated.

It should be noted that: during the peak period of electricity consumption, the implementation manner of this embodiment is not limited thereto, and this embodiment is only an example for illustration. For example, when the control unit 90 determines that it is in the peak period of power consumption according to the obtained current time, the control unit 90 can first obtain the user's power consumption situation, and determine the trigger storage time according to the difference between the user's current power consumption and the limited power consumption. The energy device 72 provides refrigerant to the indoor heat exchange branch 79 of the reserve passage 70 for cooling or triggers the main working passage 50 for cooling; specifically, the difference between the user's current power consumption and the limited power consumption is greater than the preset difference , the control unit 90 can trigger the main working channel 50 to perform cooling, and when the control unit 90 determines that the difference between the user's current power consumption and the limited power consumption is reduced to a preset difference, it triggers the accumulator 72 to transfer to the reserve channel. The indoor heat exchange branch 79 of 70 provides refrigerant for cooling. For another example, the control unit 90 may determine to trigger the accumulator 72 to supply the refrigerant to the indoor heat exchange branch 79 of the reserve passage 70 for cooling or trigger the main working passage 50 to perform cooling according to the conditions of the electrical equipment activated by the user; specifically , when the overall power consumption of the electric equipment activated by the user reaches the preset power consumption, the control unit 90 can trigger the accumulator 72 to supply the refrigerant to the indoor heat exchange branch 79 of the storage channel 70 for cooling, and when the user starts When the overall power consumption of the electrical equipment is lower than the preset power consumption, the control unit 90 can trigger the main working channel 50 to perform cooling.

In this example, during the peak period of power consumption, when receiving a cooling command from the user, the accumulator 72 is preferentially used to provide refrigerant to the indoor heat exchange branch 79 of the storage channel 70 for cooling, which can reduce the power consumption of the air conditioning system It is beneficial to prolong the use time of the air conditioning system, meet the cooling needs of users for a long time, and help extend the time for users to reach the limit of power consumption or prevent users from reaching the limit of power consumption. For areas with time-based pricing, it is also conducive to reducing electricity costs.

In the air-conditioning system provided by this embodiment, the accumulator 72 of the reserve passage 70 can store and cool the refrigerant during the off-peak period and the main working passage 50 is not cooling. During the peak period of power consumption, the control unit 90 According to the cooling command, the accumulator 72 can be triggered to provide cooling refrigerant to the indoor heat exchange branch 79 of the reserve passage 70 for cooling, which is beneficial to reduce the power consumption of the air conditioning system during the peak period of power consumption and to ensure that the air conditioning system is in use. The reliability of the work during the power peak period is beneficial to prolong the service time of the air-conditioning system, and can ensure the cooling effect of the air-conditioning system to better meet the cooling needs of users; The indoor heat exchange branch 54 of the working passage 50 is set independently, which can ensure that the reserve passage 70 and the main working passage 50 are independent of each other, avoiding mutual interference between the two, and effectively ensuring the cooling performance of the main working passage 50 .

On the basis of any of the above examples, the accumulator 72 includes a plurality. For example, the accumulator 72 can include two, three or more than three, which can be specifically set according to actual needs. For example, when the area cooled by the air conditioning system is relatively large, a relatively large number of accumulators 72 can be installed, and when the area cooled by the air conditioning system is relatively small, a relatively small number of accumulators 72 can be installed . For another example, in areas with relatively high temperature, the demand for cooling is stronger, and a relatively large number of accumulators 72 may be installed; in other areas, a relatively small number of accumulators 72 may be installed. A plurality of accumulators 72 may be arranged side by side. The reserved volumes of the multiple accumulators 72 may be the same or different, or some of the stored volumes of the multiple accumulators 72 are the same.

In one of the possible implementations, along the direction away from the outlet of the electric two-way valve 30 (that is, along the direction from right to left in FIG. 1 or FIG. 5 ), the pressure upper limit values of the multiple accumulators 72 are sequentially increased. . A sequence valve 73 is connected between adjacent accumulators 72, and the opening pressure of the sequence valve 73 is equal to the pressure upper limit value adjacent to it and closer to the outlet of the electric two-way valve 30, so as to facilitate each accumulator 72 to press Store refrigerants in sequence.

Taking two accumulators 72 as an example, one accumulator 72 is relatively close to the outlet of the electric two-way valve 30, and the other accumulator 72 is relatively far away from the outlet of the electric two-way valve 30. Then, a sequence valve 73 is provided. When the control unit 90 reserves the refrigerant according to the reserve refrigeration control reserve passage 70, the refrigerant from the compressor 10 first enters the accumulator 72 relatively close to the outlet of the electric two-way valve 30, and the accumulator 72 When the actual pressure value reaches its pressure upper limit, the pressure at the inlet of the sequence valve 73 also reaches its cracking pressure, the sequence valve 73 opens, and the refrigerant from the compressor 10 enters the energy storage relatively far away from the outlet of the electric two-way valve 30. 72 for storage.

The reserve channel 70 of the air conditioning system also includes: a first pressure relay 74, the first pressure relay 74 is connected to the accumulator 72 that is farther away from the outlet of the electric two-way valve 30 among the plurality of accumulators 72, and the first pressure relay 74 is used for When the actual pressure value of the accumulator 72 connected thereto reaches the corresponding pressure upper limit value, the compressor 10 is triggered to stop working.

The reserve channel 70 of the air conditioning system also includes: a second pressure relay 75 and a first one-way valve 76, and the second pressure relay 75 is connected to the accumulator 72 that is closer to the outlet of the electric two-way valve 30 among the plurality of accumulators 72 , the other accumulators 72 in the plurality of accumulators 72 are connected to the indoor heat exchange branch 79 of the reserve passage 70 through the first one-way valve 76; When the actual pressure value of 72 drops to the corresponding lower limit value, the second electric cut-off valve 71 is triggered to disconnect the accumulator 72 from the indoor heat exchange branch 79 of the reserve passage 70 .

Fig. 3 is a schematic diagram of the flow of refrigerant when the accumulator of the air-conditioning system stores refrigerant in an embodiment of the present invention; Fig. 4 is a schematic diagram of the flow of refrigerant in an air-conditioning system when the accumulator stores refrigerant for cooling in an embodiment of the present invention; Fig. 6 is a schematic diagram of the flow direction of refrigerant when the accumulator of the air conditioning system stores refrigerant in another embodiment of the present invention; Fig. 7 is a flow direction of refrigerant in another embodiment of the present invention when the air conditioning system stores refrigerant through the accumulator for cooling schematic diagram.

Please refer to FIG. 3-4 and FIG. 6-7 , taking three accumulators 72 as an example, to illustrate the structure and implementation process of the reserve passage 70 in this embodiment. Among them, the three accumulators are respectively 72-1, 72-2 and 72-3; correspondingly, there are two sequence valves 73, respectively 73-1 and 73-2; the first one-way valve 76 is two , respectively 76-1, 76-2. Taking the upper pressure limit of the accumulator 72-1 as P ₁ , the upper limit of the pressure of the accumulator 72-2 as P ₂ , and the upper limit of the pressure of the accumulator 72-3 as P ₃ as an example, that is That is, P ₁ <P ₂ <P ₃ ; correspondingly, the opening pressure of the sequence valve 73-1 can be equal to the pressure upper limit P ₁ of the accumulator 72-1, and the opening pressure of the sequence valve 73-2 can be equal to the accumulator The pressure upper limit P ₂ of device 72-2.

When the control unit 90 receives the reserve instruction, under the control of the control unit 90, as shown in FIG. 3 or FIG. conduction, the refrigerant from the compressor 10 first enters the accumulator 72-1, and when the actual pressure value of the accumulator 72-1 reaches its pressure upper limit value P1, the pressure at the inlet _of the sequence valve 73-1 also reaches When the cracking pressure is reached, the sequence valve 73-1 opens, and the refrigerant from the compressor ₁₀ enters the accumulator 72-2. When the actual pressure value of the accumulator 72-2 reaches its pressure upper limit value P2, the sequence valve The pressure at the inlet of 73-2 also reaches its opening pressure, the sequence valve 73-2 opens, the refrigerant from the compressor 10 enters the accumulator 72-3, and the actual pressure value of the accumulator 72-3 reaches its pressure When the upper limit value P is ₃ , the first pressure relay 74 is triggered to send an electric signal, and then the compressor 10 is triggered to stop working.

When the control unit 90 determines that the current time belongs to the peak period of electricity consumption, and determines that the main working passage 50 is not cooling, it controls the opening of the first electric shut-off valve 77 according to the cooling command, so that the refrigerant stored in the accumulator 72 can enter the indoor heat exchange branch. 79 to achieve refrigeration; during this process, the compressor 10 is turned off. Specifically, as shown in Figure 4 or Figure 7, the refrigerant stored in the accumulator 72-2 enters the indoor heat exchange branch through the first one-way valve 76-1, the first electric stop valve 77, and the second throttling device 78 79. The refrigerant stored in the accumulator 72-3 enters the indoor heat exchange branch 79 through the first one-way valve 76-2, the first electric stop valve 77, and the second throttling device 78, and the refrigerant stored in the accumulator 72-1 The refrigerant enters the indoor heat exchange branch 79 through the first electric cut-off valve 77 and the second throttling device 78, the refrigerant becomes gaseous after exchanging heat in the indoor heat exchange branch 79, and the gaseous refrigerant enters the gas storage container 80; wherein, After the compressor 10 is started, the gaseous refrigerant in the gas storage container 80 can enter the compressor 10 through the second one-way valve 81 for further use. When the refrigerant stored in each accumulator 72 is released, the actual pressure value of the accumulator 72-1 drops to the pressure lower limit value P ₀ , and at this time, the second pressure relay 75 is triggered to send an electrical signal, thereby triggering the first The electric shut-off valve 77 is closed, and the reserve cooling passage stops cooling. At this time, the air conditioning system may stop cooling, or the main working channel 50 of the air conditioning system may perform cooling according to customer requirements.

In other examples, each accumulator 72 may be provided with a pressure sensor, and each pressure sensor may be electrically connected to the control unit 90 . When the control unit 90 receives the reserve command, under the control of the control unit 90, the electric two-way valve 30 and the second electric stop valve 71 connect the compressor 10 and the accumulator 72, and the refrigerant from the compressor 10 can be sequentially Enter each accumulator 72 or can enter each accumulator 72 at the same time, specifically can be set according to actual needs; According to the pressure sensor of each accumulator 72, the actual pressure in each accumulator 72 reaches the corresponding pressure upper limit , the control unit 90 controls the compressor 10 to stop working. The process of using the refrigerant stored in the accumulator 72 to realize cooling may be similar to the foregoing examples, and details will not be repeated here in this embodiment.

Optionally, the air-conditioning system further includes: a storage battery, which is used to supply power to the indoor fan of the indoor heat exchange branch 79 of the storage channel 70 when the air-conditioning system is powered off, so that the air-conditioning system can continue to operate when the air-conditioning system is powered off. Refrigeration.

In some embodiments, the air conditioning system further includes: a manual cut-off valve 83, which is used to connect or disconnect the accumulator 72 of the reserve passage 70 with the indoor heat exchange branch 79 under the action of external force. The manual stop valve 83 is provided in parallel with the first electric stop valve 77 . In actual implementation, when the air-conditioning system is powered off, start the battery, and manually operate the manual shut-off valve 83 to connect the accumulator 72 of the reserve passage 70 with the indoor heat exchange branch 79, and the accumulator will be able to exchange heat indoors. The heat branch 79 provides refrigerant, and under the action of the indoor fan, the refrigerant in the indoor heat exchange branch 79 will absorb the heat in the indoor air and vaporize into a gaseous state to achieve the cooling effect. When the working state ends, the manual cut-off valve 83 needs to be manually operated to disconnect the accumulator 72 of the reserve passage 70 from the indoor heat exchange branch 79 . In this example, by setting the manual cut-off valve 83 and the storage battery capable of supplying power to the indoor fan, when the air-conditioning system is powered off, the refrigeration can still continue.

In some other examples, the storage battery can also supply power to the first electric shut-off valve 77, so that the first electric shut-off valve 77 can connect the accumulator to the indoor heat exchange branch 79, so that the air-conditioning system can use the accumulator 72 to reserve The refrigerant realizes refrigeration. In this example, a storage battery capable of supplying power to the indoor fan and the first electric shut-off valve 77 is provided so that when the air-conditioning system is powered off, the refrigeration can still continue.

The working states of the air-conditioning system provided in this embodiment are illustrated below with examples.

Taking civilian electricity as an example, when the user uses the air conditioner for cooling during non-peak periods such as 9:00 am to 10:00 am, the user sends a cooling command to the control unit 90 through the smart terminal, and the smart terminal controls the electric two-way valve 30 according to the cooling command. The Y end of Y terminal is powered off, the electric two-way valve 30 is in the right position, the third electric stop valve 51 is normally open when the power is off, and the second electric stop valve 71 is normally closed when the power is off, so that the reserve passage 70 is closed, the compressor 10 works, and the refrigerant moves along In Fig. 1 (or Fig. 5 ), it flows in the direction of the straight arrow, that is, the refrigerant flows from the compressor 10 through the electric two-way valve 30, the third electric stop valve 51, the outdoor heat exchanger 52, the first throttling device 53, and the indoor The heat exchange branch 54, the third one-way valve 55, and then return to the compressor 10, and the air-conditioning system realizes the refrigeration function.

When the user does not use the air-conditioning system for cooling during non-peak periods such as 9:00 am to 10:00 am, that is, when the user is in non-peak periods and the main working channel 50 is not cooling, the user can report to the control unit 90 through the smart terminal. Send a reserve order. The control unit 90 controls the Y terminal of the electric two-way valve 30 to be energized according to the received reserve instruction, and the electric two-way valve 30 is in the left position. The control unit 90 controls the third electric stop valve 51 to be energized and closed according to the received reserve instruction. The second electric stop valve 71 is powered to open the compressor 10 to work, the refrigerant flows along the direction of the straight arrow in Figure 3 (or Figure 6), and the refrigerant flowing out from the compressor 10 passes through the electric two-way valve 30 and the second electric stop valve 71 Enter the accumulator 72-1, when the actual pressure in the accumulator 72-1 reaches P ₁ , the sequence valve 73-1 opens, the refrigerant enters the accumulator 72-2, when the actual pressure of the accumulator 72-2 When P2 is reached, the sequence valve _73-2 opens, and the refrigerant enters the accumulator 72-3. When the actual pressure of the accumulator 72-3 reaches _P3 , the first pressure relay 74 sends out an electric signal, and the compressor 10 is powered off Stop working, the second electric shut-off valve 71 loses power and normally closes. The accumulator 72 of the air conditioning system completes the storage of refrigerant. The accumulator can cool the stored refrigerant through the cooling fins 82 on its outer surface.

When the user uses the air conditioning system for cooling during the peak period of electricity consumption, such as from 19:00 to 21:00, after the user sends a cooling command through the smart terminal, the control unit 90 can preferentially select the reserve channel 70 for cooling according to the received cooling command. , the compressor 10 does not work at this moment. Specifically, the control unit 90 controls the second electric cut-off valve 71 to be normally closed when de-energized, and the first electric stop valve 77 is powered to open, the refrigerant flows along the dotted arrow in FIG. 4 (or FIG. 7 ), and the accumulator 72-2 reserves The refrigerant enters the indoor heat exchange branch 79 through the first one-way valve 76-1, the first electric stop valve 77, and the second throttling device 78, and the refrigerant stored in the accumulator 72-3 passes through the first one-way valve 76- 2. The first electric cut-off valve 77 and the second throttling device 78 enter the indoor heat exchange branch 79, and the refrigerant stored in the accumulator 72-1 enters the indoor heat exchange through the first electric cut-off valve 77 and the second throttling device 78 In the branch 79, the refrigerant becomes gaseous after exchanging heat in the indoor heat exchange branch 79, and the gaseous refrigerant enters the gas storage container 80 for storage. When the actual pressure in the accumulator _72-1 drops to P0, it means that the reserve refrigerant has been released, the second pressure relay 75 sends out an electric signal, the first electric shut-off valve 77 loses power and normally closes, and the reserve passage 70 works in refrigeration Finish. If the user still needs cooling, the air conditioning system can perform cooling through the main working channel 50 .

When the user is powered off, the user can start the battery to drive the indoor fan to supply air, and manually open the manual shut-off valve 83, and the refrigerant in the accumulator will enter through the check valve, the manual shut-off valve 83, and the second throttling device 78. The indoor heat exchange branch 79 is used to achieve cooling purpose, and then the refrigerant enters the air storage container 80 for storage. When the working state ends, the manual cut-off valve 83 needs to be manually operated to disconnect the accumulator 72 of the reserve passage 70 from the indoor heat exchange branch 79 .

It should be noted that: the working state of the air-conditioning system provided in this embodiment is not limited thereto, and this embodiment is only an example for illustration.

So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings, but those skilled in the art will easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

An air conditioning system, characterized in that it includes: a compressor, an electric two-way valve, a main working passage, a reserve passage and a control unit;

The electric two-way valve is used to connect one of the main working passage and the reserve passage with the outlet of the compressor;

The reserve passage includes: at least one accumulator, the accumulator is used to store and cool the refrigerant when the reserve passage is connected to the outlet of the compressor;

The control unit is used to trigger the electric two-way valve according to the reserve instruction to conduct the reserve passage with the outlet of the compressor during the non-peak period of power consumption, so that the accumulator stores refrigerant;

The control unit is also used to trigger the accumulator to supply refrigerant to the indoor heat exchange branch of the storage path for cooling according to the cooling instruction during the peak period of power consumption;

Wherein, the indoor heat exchange branch of the reserve passage is set independently from the indoor heat exchange branch of the main working passage.
The air conditioning system according to claim 1, characterized in that, the indoor heat exchange branch of the main working passage and the indoor heat exchange branch of the reserve passage are arranged in parallel in the heat exchange fins.
The air conditioning system according to claim 1, wherein the indoor heat exchange branch of the main working passage and the indoor heat exchange branch of the reserve passage are respectively arranged in corresponding heat exchange fins.
The air conditioning system according to any one of claims 1-3, wherein the control unit is configured to trigger the electric two The through valve communicates the reserve passage with the outlet of the compressor.
The air conditioning system according to any one of claims 1-4, characterized in that at least a part of the outer surface of the accumulator has cooling fins.
The air conditioning system according to any one of claims 1-5, characterized in that the accumulator includes multiple pressure upper limit values of the accumulator along the direction away from the outlet of the electric two-way valve. Incremental in sequence; a sequence valve is connected between the adjacent accumulators, and the opening pressure of the sequence valve is equal to the pressure upper limit value of the adjacent and closer to the outlet of the electric two-way valve.
The air conditioning system according to claim 6, further comprising: a first pressure relay, the first pressure relay is connected to the accumulator which is farther away from the outlet of the electric two-way valve among the plurality of accumulators. The first pressure relay is used to trigger the compressor to stop working when the actual pressure value of the accumulator connected to it reaches the corresponding pressure upper limit value.
The air-conditioning system according to claim 6 or 7, characterized in that the air-conditioning system further comprises: a first electric shut-off valve, the first electric shut-off valve is connected to the indoor heat exchange of the accumulator and the reserve passage Between the branches, it is used to conduct or disconnect the indoor heat exchange branch of the accumulator and the reserve passage;

The air conditioning system also includes: a second pressure relay and a first one-way valve, the second pressure relay is connected to the accumulator closer to the outlet of the electric two-way valve among the multiple accumulators, and the multiple accumulators The other accumulators in the storage circuit are connected to the indoor heat exchange branch of the reserve passage through the first one-way valve;

Wherein, the second pressure switch is used to trigger the first electric cut-off valve to exchange the accumulator with the chamber of the reserve passage when the actual pressure value of the accumulator connected to it drops to the corresponding lower pressure limit. Hot branch disconnected.
The air-conditioning system according to any one of claims 1-8, characterized in that the air-conditioning system further comprises: a second electric shut-off valve, the second electric shut-off valve is connected to the electric two-way valve and the energy storage Between the devices, it is used to connect or disconnect the electric two-way valve and the accumulator.
The air-conditioning system according to any one of claims 1-9, characterized in that the air-conditioning system further comprises: an air storage container and a second one-way valve, the inlet of the air storage container is connected to the In the indoor heat exchange branch, the outlet of the gas storage container is connected to the compressor through the second one-way valve.